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Floating constructed wetlands (FCWs) have attained tremendous popularity for water purification purposes. However, FCW functions establishment in nutrients removal from carbon-limited wastewater, especially in cold weather, is still a challenge. Here, two drinking water treatment residual (DWTR) based biocarriers (B-I: DWTR cakes, B-II: DWTR cakes combined with woodchips) have been augmented into FCW to enhance the nutrients (N and P) removal performance. Compared to the traditional FCW, the intensified FCWs simultaneously achieved higher N and P removal efficiencies, with average pollutants removal of 52.16 ± 11.51% for TN and 92.72 ± 1.61% for TP in FCW-I and 57.65 ± 9.43% for TN and 92.17 ± 2.55% for TP in FCW-II, respectively, while their removal in FCW-III of 27.74 ± 7.11% for TN and 17.91 ± 9.27% for TP. B-II performed best in overcoming the negative influence of low temperature in nutrients removal. Mass balance budget indicated that most P was enriched in DWTR based biocarriers. Thus it is feasible to recycle and recover P from the surface water. Furthermore, P in the sediment can be changed from active P to stable P, mitigating the internal P release risk. This study can help to expand the understanding of the intensified FCWs and promote the practical application of FCWs.
Cheng Shen; Yaqian Zhao; Yan Li; Liu Ranbin; Jie Wang; Yan Yang. Treating carbon-limited wastewater by DWTR and woodchip augmented floating constructed wetlands. Chemosphere 2021, 285, 131331 .
AMA StyleCheng Shen, Yaqian Zhao, Yan Li, Liu Ranbin, Jie Wang, Yan Yang. Treating carbon-limited wastewater by DWTR and woodchip augmented floating constructed wetlands. Chemosphere. 2021; 285 ():131331.
Chicago/Turabian StyleCheng Shen; Yaqian Zhao; Yan Li; Liu Ranbin; Jie Wang; Yan Yang. 2021. "Treating carbon-limited wastewater by DWTR and woodchip augmented floating constructed wetlands." Chemosphere 285, no. : 131331.
Greening systems are among the most environmentally friendly technologies for cleaning water and air in urban settlements. The application of green walls has recently broadened from solely offering aesthetic values to focusing on solving urban environmental challenges including wastewater treatment, thereby increasing the efficiency of green buildings. Indeed, green wall is an alternative form of constructed wetlands, which has been well recognized and widely applied worldwide for various wastewater treatments, particularly in greywater treatment. This review aims in shedding light on the current state of the new application of green walls, and highlighting the potential for further system and operational developments of this technology. Initially, the types of green wall systems, their various classifications, system designs, their benefits and performance in the treatment of wastewater for reuse purposes were reviewed. It shows that though the green wall has been largely limited for greywater treatment, the system has the potential to treat high strength organic wastewater. Furthermore, the integration of the green wall with disinfecting techniques has a high likelihood of producing treated effluent that meets water regulation standards for a wider range of reuse applications. Analysis of organic pollutant and nutrient removal efficiencies from experiments and case studies reviewed show that green wall design, choice of substrate and vegetation under the right operational conditions can significantly improve the overall performance of the green wall system. Finally, the future research directions are suggested for wide and wiser application of this kind of technology.
Olivia Addo-Bankas; Yaqian Zhao; Jan Vymazal; Yujie Yuan; Jingmiao Fu; Ting Wei. Green walls: A form of constructed wetland in green buildings. Ecological Engineering 2021, 169, 106321 .
AMA StyleOlivia Addo-Bankas, Yaqian Zhao, Jan Vymazal, Yujie Yuan, Jingmiao Fu, Ting Wei. Green walls: A form of constructed wetland in green buildings. Ecological Engineering. 2021; 169 ():106321.
Chicago/Turabian StyleOlivia Addo-Bankas; Yaqian Zhao; Jan Vymazal; Yujie Yuan; Jingmiao Fu; Ting Wei. 2021. "Green walls: A form of constructed wetland in green buildings." Ecological Engineering 169, no. : 106321.
The review paper sis based on the analysis or nearly 700 research papers published during 2019 and the first half of 2020 and indexed by Web of Science under the password “constructed wetlands for wastewater treatment”. Out of this number 132 papers dealing with “new” topics such as new wastewaters treated in constructed wetlands (CW), new filtration materials, role of vegetation, floating treatment wetlands, microbiology of CW, greenhouse gas emissions from CWs, sustainability and secondary benefits of CWs. For the deeper analysis the supporting literature from previous periods has been cited. The analysis indicates increasing popularity and diversification of types and tasks of CWs. This supports the need for further research of processes and design-related properties of CWs. The research in full scale CWs and long-term studies are only rare and in order to upgrade the CWs technology, research must be also carried out in the field under full-scale conditions.
Jan Vymazal; Yaqian Zhao; Ülo Mander. Recent research challenges in constructed wetlands for wastewater treatment: A review. Ecological Engineering 2021, 169, 106318 .
AMA StyleJan Vymazal, Yaqian Zhao, Ülo Mander. Recent research challenges in constructed wetlands for wastewater treatment: A review. Ecological Engineering. 2021; 169 ():106318.
Chicago/Turabian StyleJan Vymazal; Yaqian Zhao; Ülo Mander. 2021. "Recent research challenges in constructed wetlands for wastewater treatment: A review." Ecological Engineering 169, no. : 106318.
Oxygen is the electron acceptor in cathode chamber of microbial fuel cell-constructed wetland system (MFC-CW). The objective of the study lies in creating a “tidal flow” (TF) in cathode chamber via a siphon to enhance the oxygen diffusion, thus promoting the system performance. A laboratory scale MFC-CW with a siphon driven TF recirculation was proposed and designed. It allows the variable water level being created in four operational modes. The results demonstrated the significance of the siphon which was reflected by the attractive wastewater treatment performance. Compared with the tested four operational modes under the same hydraulic condition, the highest total nitrogen removal efficiency of 96.32% and COD removal efficiency of 92.37% were achieved, respectively, in 1st full siphon recirculation mode (FSR) and 2nd FSR operation mode. Indeed, the water level variation range played an important role in pollutants removal performance. Reduced water level variation of the TF in cathode chamber hindered excessive oxygen diffusion into MFC-CW and thus adversely affected the system performance. It is clear that the siphon is a wiser input to bring about the better treatment performance, but it is believed that the enhanced microbial activities behind the oxygen promotion is the driven force to exhibiting a better performance in the MFC-CW system.
Cheng Tang; Yaqian Zhao; Chun Kang; Jintao He; Yan Yang; David Morgan. Creating tidal flow via siphon for better pollutants removal in a microbial fuel cell-constructed wetland. Journal of Environmental Management 2021, 290, 112592 .
AMA StyleCheng Tang, Yaqian Zhao, Chun Kang, Jintao He, Yan Yang, David Morgan. Creating tidal flow via siphon for better pollutants removal in a microbial fuel cell-constructed wetland. Journal of Environmental Management. 2021; 290 ():112592.
Chicago/Turabian StyleCheng Tang; Yaqian Zhao; Chun Kang; Jintao He; Yan Yang; David Morgan. 2021. "Creating tidal flow via siphon for better pollutants removal in a microbial fuel cell-constructed wetland." Journal of Environmental Management 290, no. : 112592.
A novel alum sludge-based odor-gas aerated vertical flow biofilter (Al-OAF) was developed, which aims to removal the pollutants in wastewater and simultaneously to eliminate H2S generated from wastewater treatment facility. Three lab-scale parallel columns were operated in batch model while intermittently aerated with 200 ppm H2S (Al-OAF), air (Al-AF) and unaerated (Al-F, as blank), respectively. The pollutants in wastewater and the effluent H2S concentration from Al-OAF were monitored regularly. Results showed that three columns presented a high removal efficiency (>98%) of total phosphorus (TP) and a completed removal of H2S (100%) in Al-OAF. Al-OAF and Al-AF could enhance the removal efficiency of chemical oxygen demand (COD) of 94.3 ± 3.0, 94.8 ± 1.9%, and total nitrogen (TN) of 86.2 ± 14.2, 91.6 ± 5.4%, respectively. In particular, there was no significant difference regarding the COD, TN removal performances between the “H2S driven” Al-OAF and the “air driven” Al-AF. The H2S removal mechanism lies in the alum sludge ability of H2S adsorption and the reaction by the biofilm in the biofilter. This demonstrates that the novel Al-OAF (aerated with waste gas) would be a promising “wise choice” for intensified biofilter with dual-goals of simultaneous wastewater purification and H2S elimination.
Baiming Ren; Nathalie Lyczko; Yaqian Zhao; Ange Nzihou. Simultaneous hydrogen sulfide removal and wastewater purification in a novel alum sludge-based odor-gas aerated biofilter. Chemical Engineering Journal 2021, 419, 129558 .
AMA StyleBaiming Ren, Nathalie Lyczko, Yaqian Zhao, Ange Nzihou. Simultaneous hydrogen sulfide removal and wastewater purification in a novel alum sludge-based odor-gas aerated biofilter. Chemical Engineering Journal. 2021; 419 ():129558.
Chicago/Turabian StyleBaiming Ren; Nathalie Lyczko; Yaqian Zhao; Ange Nzihou. 2021. "Simultaneous hydrogen sulfide removal and wastewater purification in a novel alum sludge-based odor-gas aerated biofilter." Chemical Engineering Journal 419, no. : 129558.
Alum sludge (AlS) refers to the inevitable by-product generated during the drinking water purification process, where Al-salt is used as a coagulant in the water industry. It has long been treated as “waste”, while landfill is its major final disposal destination. In fact, AlS is an underutilized material with huge potential for beneficial reuse as a raw material in various wastewater treatment processes. In the last two decades, intensive studies have been conducted worldwide to explore the “science” and practical application of AlS. This paper focuses on the recent developments in the use of AlS that show its strong potential for reuse in wastewater treatment processes. In particular, the review covers the key “science” of the nature and mechanisms of AlS, revealing why AlS has the potential to be a value-added material. In addition, the future focus of research towards the widespread application of AlS as a raw material/product in commercial markets is suggested, which expands the scope for AlS research and development.
Wei Zhao; Huina Xie; Jie Li; Lihong Zhang; Yaqian Zhao. Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways. Processes 2021, 9, 612 .
AMA StyleWei Zhao, Huina Xie, Jie Li, Lihong Zhang, Yaqian Zhao. Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways. Processes. 2021; 9 (4):612.
Chicago/Turabian StyleWei Zhao; Huina Xie; Jie Li; Lihong Zhang; Yaqian Zhao. 2021. "Application of Alum Sludge in Wastewater Treatment Processes: “Science” of Reuse and Reclamation Pathways." Processes 9, no. 4: 612.
There are overwhelming increases of studies and over 200,000 publications related to all the aspects of COVID-19. Among them, 262 papers were published by authors from 67 countries regarding COVID-19 with water science and technology. Although the transmission routes of SARS-CoV-2 in water cycle have not been proved, the water and wastewater play an important role in the control of COVID-19 pandemic. Accordingly, it is scholarly relevant and interesting to look into publications of COVID-19 in water science and technology to track the investigations for moving forward in the years to come. It is believed that, through the literature survey, the question on what we know and what we do not know about COVID-19 so far can be clear, thus providing useful information for helping curbing the epidemic from water sector. This forms the basis of the current study. As such, a bibliometric analysis was conducted. It reveals that wastewater-based epidemiology (WBE) has recently gained global attention with the source and survival characteristics of coronavirus in the aquatic environment; the methodology of virus detection; the water hygiene; and the impact of the COVID-19 pandemic on the water ecosystem being the main topics in 2020. Various studies have shown that drinking water is safety whereas wastewater may be a potential risk during this pandemic. From the perspective of the water cycle, the scopes for further research needs are discussed and proposed, which could enhance the important role and value of water science in warning, monitoring, and predicting COVID-19 during epidemic outbreaks.
Bin Ji; Yaqian Zhao; Ting Wei; Peiying Kang. Water science under the global epidemic of COVID-19: Bibliometric tracking on COVID-19 publication and further research needs. Journal of Environmental Chemical Engineering 2021, 9, 105357 -105357.
AMA StyleBin Ji, Yaqian Zhao, Ting Wei, Peiying Kang. Water science under the global epidemic of COVID-19: Bibliometric tracking on COVID-19 publication and further research needs. Journal of Environmental Chemical Engineering. 2021; 9 (4):105357-105357.
Chicago/Turabian StyleBin Ji; Yaqian Zhao; Ting Wei; Peiying Kang. 2021. "Water science under the global epidemic of COVID-19: Bibliometric tracking on COVID-19 publication and further research needs." Journal of Environmental Chemical Engineering 9, no. 4: 105357-105357.
Integrated constructed wetland-microbial fuel cells (CW-MFCs) use exoelectrogenic bacteria to transform the energy inherently existed in wastewater into bioelectricity and simultaneously remove the contaminants in wastewater. They have the potential to provide a solution for both water and energy challenges. In this study, a novel two-tiered CW-MFC system consisted of a dewatered Al-DWTR-based up-flow CW-MFC (Top CW-MFC) and a pyrrhotite-based downflow CW-MFC (Bottom CW-MFC) was constructed. The two-tiered CW-MFC system was operated under different COD concentrations, HRTs and operation modes over a 477-day trial. The treated effluent had an overall average COD concentration of 69.05 mg/L. High power density of the top CW-MFC of 741.36 mW/m3 (A1-C) and 339.56 mW/m3 (A2-C) at HRT of 2.49 d (Phase 7) with continuous flow and 1162.63 mW/m3 (A1-C) and 352.34 mW/m3 (A2-C) with tidal flow (Phase 10), respectively, was achieved. Co-occurrence of Feammox and iron sulphide-based denitrification were found in bottom CW-MFC, leading to the enhanced nitrogen removal in the system. The genera of SRB (Desulfosporosinus, Desulfobulbus, Desulfobacca, Desulfovibrio and members of Desulfobacteraceae), exoelectrogenic bacteria enriched in the system resulted in a low release of sulfate, and effective pollutant removal and bioelectricity production. The findings highlight the novel two-tiered CW-MFC system for efficient wastewater treatment and high performance of energy extraction, supporting a clean environment.
Yan Yang; Yaqian Zhao; Cheng Tang; Yi Mao; Tianhu Chen; Yuansheng Hu. Novel pyrrhotite and alum sludge as substrates in a two-tiered constructed wetland-microbial fuel cell. Journal of Cleaner Production 2021, 293, 126087 .
AMA StyleYan Yang, Yaqian Zhao, Cheng Tang, Yi Mao, Tianhu Chen, Yuansheng Hu. Novel pyrrhotite and alum sludge as substrates in a two-tiered constructed wetland-microbial fuel cell. Journal of Cleaner Production. 2021; 293 ():126087.
Chicago/Turabian StyleYan Yang; Yaqian Zhao; Cheng Tang; Yi Mao; Tianhu Chen; Yuansheng Hu. 2021. "Novel pyrrhotite and alum sludge as substrates in a two-tiered constructed wetland-microbial fuel cell." Journal of Cleaner Production 293, no. : 126087.
A newly emerged alum sludge-based hybrid constructed wetland-microbial fuel cells (CW-MFCs), i.e. vertical upflow CW coupled MFC as 1st stage and horizontal subsurface flow CW coupled MFC as 2nd stage (VFCW-MFC + HSSFCW-MFC), was firstly developed for swine wastewater treatment and electricity generation. Swine wastewater and multi-set air-cathodes were applied to investigate the pollutants removal behavior and the power production. Six-month trial suggested that the overall removal efficiency of SS, COD, NH4+-N, NO3−-N, TN, TP and PO43--P was 76 ± 12.4, 72 ± 7.4, 59 ± 28.3, 69 ± 25.6, 47 ± 19.7, 85 ± 9.5 and 88 ± 8.7%, respectively. The two stages hybrid system (VFCW-MFC + HSSFCW-MFC) continuously generated electrical power with average voltages of 0.44 ± 0.09 and 0.34 ± 0.09 V, and power densities of 33.3 ± 13.81 and 9.0 ± 2.5 mW/m³ in 1st and 2nd stage, respectively. The average net energy recovery (NER) of 1st stage and 2nd stage is in turn 0.91 ± 0.16 and 2.76 ± 0.70 Wh/kg·COD. It indicates that the hybrid CW-MFCs has higher removal efficiency than single stage CW-MFC, while 1st stage plays the major role both in pollutants removal and power generation.
Baiming Ren; Tongyue Wang; Yaqian Zhao. Two-stage hybrid constructed wetland-microbial fuel cells for swine wastewater treatment and bioenergy generation. Chemosphere 2020, 268, 128803 .
AMA StyleBaiming Ren, Tongyue Wang, Yaqian Zhao. Two-stage hybrid constructed wetland-microbial fuel cells for swine wastewater treatment and bioenergy generation. Chemosphere. 2020; 268 ():128803.
Chicago/Turabian StyleBaiming Ren; Tongyue Wang; Yaqian Zhao. 2020. "Two-stage hybrid constructed wetland-microbial fuel cells for swine wastewater treatment and bioenergy generation." Chemosphere 268, no. : 128803.
By 17 October 2020, the severe acute respiratory syndrome coronavirus (SARS-CoV-2) has caused confirmed infection of more than 39,000,000 people in 217 countries and territories globally and still continues to grow. As environmental professionals, understanding how SARS-CoV-2 can be transmitted via water and air environment is a concern. We have to be ready for focusing our attention to the prompt diagnosis and potential infection control procedures of the virus in integrated water and air system. This paper reviews the state-of-the-art information from available sources of published papers, newsletters and large number of scientific websites aimed to provide a comprehensive profile on the transmission characteristics of the coronaviruses in water, sludge, and air environment, especially the water and wastewater treatment systems. The review also focused on proposing the possible curb strategies to monitor and eventually cut off the coronaviruses under the authors’ knowledge and understanding.
Bin Ji; Yaqian Zhao; Abraham Esteve-Núñez; Ranbin Liu; Yang Yang; Ange Nzihou; Yiping Tai; Ting Wei; Cheng Shen; Baimimng Ren; Xingxing Wang; Ya'e Wang. Where do we stand to oversee the coronaviruses in aqueous and aerosol environment? Characteristics of transmission and possible curb strategies. Chemical Engineering Journal 2020, 413, 127522 -127522.
AMA StyleBin Ji, Yaqian Zhao, Abraham Esteve-Núñez, Ranbin Liu, Yang Yang, Ange Nzihou, Yiping Tai, Ting Wei, Cheng Shen, Baimimng Ren, Xingxing Wang, Ya'e Wang. Where do we stand to oversee the coronaviruses in aqueous and aerosol environment? Characteristics of transmission and possible curb strategies. Chemical Engineering Journal. 2020; 413 ():127522-127522.
Chicago/Turabian StyleBin Ji; Yaqian Zhao; Abraham Esteve-Núñez; Ranbin Liu; Yang Yang; Ange Nzihou; Yiping Tai; Ting Wei; Cheng Shen; Baimimng Ren; Xingxing Wang; Ya'e Wang. 2020. "Where do we stand to oversee the coronaviruses in aqueous and aerosol environment? Characteristics of transmission and possible curb strategies." Chemical Engineering Journal 413, no. : 127522-127522.
Bioelectrochemical system (BES) based biosensors for organic sensing has long been investigated. However, there is no uniform criterion to evaluate directly the performance of the BES based biosensors due to their different scale. Here, for the first time, we show that the normalized maximum detection range (NMDR) and normalized sensing time (NST) can potentially be used as the two criteria in BES based biosensors for organic sensing. Thereafter, the recently emerged, relatively larger scale BES (i.e. constructed wetland-microbial fuel cell, CW-MFC) was specifically examined in this study. The biocathode formation and the influence of anodic material on sensor performance were systematically evaluated. The system with metal-based anode was found to produce a more stable and quicker response (low NST) than that with carbon-based anode. Significantly, the continuous loading mode was found to greatly reduce the NMDR compared to the batch mode, and the hydraulic residence time (HRT) is the critical factor determining the NMDR. Furthermore, it was found that the electrical signals generated from the CW-MFC system were insignificantly influenced by some specific chemical disturbances, such as Cu2+ and herbicide. Therefore, normalized toxicity (NT) is suggested to be considered in BES based biosensor. However, for chemicals with higher reduction potentials (NO3- in this work), the system presented a high response, enabling its potential for monitoring NO3- in effluents or groundwater. This study can hopefully contribute to further development of the sustainable BES based biosensors in CW.
Lei Xu; Wenzheng Yu; Nigel Graham; Yaqian Zhao. Revisiting the bioelectrochemical system based biosensor for organic sensing and the prospect on constructed wetland-microbial fuel cell. Chemosphere 2020, 264, 128532 .
AMA StyleLei Xu, Wenzheng Yu, Nigel Graham, Yaqian Zhao. Revisiting the bioelectrochemical system based biosensor for organic sensing and the prospect on constructed wetland-microbial fuel cell. Chemosphere. 2020; 264 ():128532.
Chicago/Turabian StyleLei Xu; Wenzheng Yu; Nigel Graham; Yaqian Zhao. 2020. "Revisiting the bioelectrochemical system based biosensor for organic sensing and the prospect on constructed wetland-microbial fuel cell." Chemosphere 264, no. : 128532.
The embedding microbial fuel cell (MFC) into constructed wetlands (CW) to form CW-MFC bears the potential to obtain bioelectricity and a clean environment. In this study, a bibliometric analysis using VOSviewer based on Web of Science data was conducted to provide an overview by tracing the development footprint of this technology. The countries, institutions, authors, key terms, and keywords were tracked and corresponding mapping was generated. From 2012 to September 2020, 442 authors from 129 organizations in 26 countries published 135 publications in 42 journals with total citation of 3139 times were found. The key terms analysis showed four clusters: bioelectricity generation performance, mechanism study, refractory pollutants removal, and enhanced conventional contaminants removal. Further research themes include exploring the biochemical properties of electrochemically active bacteria, emerging contaminants removal, effective bioelectricity harvest and the use, and biosensor development as well as scaling-up for real field application. The bibliometric results provide valuable references and information on potential research directions for future studies.
Bin Ji; Yaqian Zhao; Jan Vymazal; Ülo Mander; Rauno Lust; Cheng Tang. Mapping the field of constructed wetland-microbial fuel cell: A review and bibliometric analysis. Chemosphere 2020, 262, 128366 .
AMA StyleBin Ji, Yaqian Zhao, Jan Vymazal, Ülo Mander, Rauno Lust, Cheng Tang. Mapping the field of constructed wetland-microbial fuel cell: A review and bibliometric analysis. Chemosphere. 2020; 262 ():128366.
Chicago/Turabian StyleBin Ji; Yaqian Zhao; Jan Vymazal; Ülo Mander; Rauno Lust; Cheng Tang. 2020. "Mapping the field of constructed wetland-microbial fuel cell: A review and bibliometric analysis." Chemosphere 262, no. : 128366.
In the recent years many studies have shown that wetland plants play beneficial roles in bioelectricity enhancement in constructed wetland-microbial fuel cell (CW-MFC) because of the exudation of root oxygen and root exudates. In this study, the long-term roles of plants on the bioelectricity generation and contaminant removal were investigated in multi-anode (Anode1 and Anode2) and single cathode CW-MFCs. The electrode distances were 20 cm between Anode1-cathode and 10 cm between Anode2-cathode, respectively. Additionally, the employment of natural conductive pyrrhotite mineral as cathode material was firstly investigated in CW-MFC system. A cathode potential of -98±52 mV to -175±60 mV was achieved in the unplanted (CW-MFC 1), and planted CW-MFCs with Iris pseudacorus (CW-MFC 2), Lythrum salicaria (CW-MFC 3), and Phragmites australis (CW-MFC 4). The maximum power densities of Anode1-cathode and Anode 2-cathode were 8.23 and 15.29 mW/m2 in CW-MFC 1, 8.51 and 1.67 mW/m2 in CW-MFC 2, 5.67 and 3.15 mW/m2 in CW-MFC 3, and 7.59 and 14.71 mW/m2 in CW-MFC 4, respectively. Interestingly, smaller power density was observed at Anode2-cathode, which has shorter electrode distance than Anode1-cathode in both CW-MFC 2 and CW-MFC 3, which indicates the negative role of oxygen released from the flourished plant roots at Anode2 micro-environment in power production. Therefore, recovering power from commercial CW-MFCs with flourished plants will be a challenge. The contradiction between keeping short electrode distance and avoiding the interference from plant roots to maintain anaerobic anode may be solved by the proposed modular CW-MFCs.
Yan Yang; Yaqian Zhao; Cheng Tang; Ranbin Liu; Tianhu Chen. Dual role of macrophytes in constructed wetland-microbial fuel cells using pyrrhotite as cathode material: A comparative assessment. Chemosphere 2020, 263, 128354 .
AMA StyleYan Yang, Yaqian Zhao, Cheng Tang, Ranbin Liu, Tianhu Chen. Dual role of macrophytes in constructed wetland-microbial fuel cells using pyrrhotite as cathode material: A comparative assessment. Chemosphere. 2020; 263 ():128354.
Chicago/Turabian StyleYan Yang; Yaqian Zhao; Cheng Tang; Ranbin Liu; Tianhu Chen. 2020. "Dual role of macrophytes in constructed wetland-microbial fuel cells using pyrrhotite as cathode material: A comparative assessment." Chemosphere 263, no. : 128354.
Waterworks sludge refers to the inevitable suspended and dissolved solids produced during the water purification process when producing tap water where Al-salt and/or Fe-salt are used as coagulant worldwide. Waterworks sludge is dewatered and the resultant cakes have been treated as “waste” for landfill as their major final disposal solution for a long time in practice. As waterworks sludge is the residual of potable water treatment process, it is not harmful and without toxic elements such as heavy metals in most cases in comparison to sewage sludges for instance. Actually, waterworks sludge is an underrated material with huge potential for beneficial reuse as raw material in water and environmental engineering. However, little was significantly progressed on this topic until the last two decades. Research and development (R&D) with special interest and focus on waterworks sludge reuse was conducted in our group in the last 15 years and this paper reports and discusses the main work and its novel application profile. Overall, it is believed that the R&D of waterworks sludge is useful and will help to develop national strategy of the entire waterworks sludge management, allowing its transformation from a “waste” into value-added products, and thus contribute to sustainable development.
Yaqian Zhao; Ange Nzihou; Baiming Ren; Nathalie Lyczko; Cheng Shen; Chun Kang; Bin Ji. Waterworks Sludge: An Underrated Material for Beneficial Reuse in Water and Environmental Engineering. Waste and Biomass Valorization 2020, 12, 4239 -4251.
AMA StyleYaqian Zhao, Ange Nzihou, Baiming Ren, Nathalie Lyczko, Cheng Shen, Chun Kang, Bin Ji. Waterworks Sludge: An Underrated Material for Beneficial Reuse in Water and Environmental Engineering. Waste and Biomass Valorization. 2020; 12 (8):4239-4251.
Chicago/Turabian StyleYaqian Zhao; Ange Nzihou; Baiming Ren; Nathalie Lyczko; Cheng Shen; Chun Kang; Bin Ji. 2020. "Waterworks Sludge: An Underrated Material for Beneficial Reuse in Water and Environmental Engineering." Waste and Biomass Valorization 12, no. 8: 4239-4251.
Constructed wetland (CW) works mostly depending on biological and biochemical processes. No doubt, these processes are affected by climate conditions. This is a challenge and that is why this review was made. By inspecting most of the published full-scale investigations of the CWs worldwide, it seems that the nitrogen is the most sensitive parameter to be affected in the cold climate, while organic matter and phosphorus remain relatively less affected. The low-temperature and oxygen shortcoming are together inhibited the biota activities. To face such situation, a wide range of possible intensification strategies from CW structure and operation related intensification (controlled tidal flow, batch operation, effluent recirculation, etc.) are discussed. Indeed, the effects of cold climate on CWs are an integrated issue without single solution. Future studies on the combination of multiple approaches and optimizing suitable microcosms as well as reasonable design and intensification considerations in cold climate CWs are necessary.
Bin Ji; Yaqian Zhao; Jan Vymazal; Shangxiao Qiao; Ting Wei; Jie Li; Ülo Mander. Can subsurface flow constructed wetlands be applied in cold climate regions? A review of the current knowledge. Ecological Engineering 2020, 157, 105992 .
AMA StyleBin Ji, Yaqian Zhao, Jan Vymazal, Shangxiao Qiao, Ting Wei, Jie Li, Ülo Mander. Can subsurface flow constructed wetlands be applied in cold climate regions? A review of the current knowledge. Ecological Engineering. 2020; 157 ():105992.
Chicago/Turabian StyleBin Ji; Yaqian Zhao; Jan Vymazal; Shangxiao Qiao; Ting Wei; Jie Li; Ülo Mander. 2020. "Can subsurface flow constructed wetlands be applied in cold climate regions? A review of the current knowledge." Ecological Engineering 157, no. : 105992.
Microplastics (MPs), as an emerging pollutant derived from the human daily life and industry activities, have been widely detected in ecosystem. Wastewater treatment plants (WWTPs) play a special role in the mass flow of MPs because it is not only one of the important point sources of MPs, but also a way of collecting and removing MPs from wastewater. It is necessary to analyze the fate of MPs in WWTPs and the volume released into the environment. However, the lack of standard analytical methods of MPs in WWTPs limited the accuracy assessment of MPs and comparison between different studies. This review summarized the current knowledge on analysis approaches of MPs in WWTPs and proposed an analysis process. Specifically, the MPs sampling sites of wastewater and sludge treatment route is discussed. Moreover, various processing procedure for samples collection and pretreatment including extraction and purification, as well as identification and characterization of MPs are reviewed in great detail. Finally, as an important way to ensure accuracy of studies, quality assurance and control measures are presented. It should be pointed out that the overall analysis processes are interdependent and should be chosen and harmonized according to the aim of individual study. The lack of reliable and uniformity analysis methodology is the key challenge for present studies which needs further development.
Peiying Kang; Bin Ji; Yaqian Zhao; Ting Wei. How can we trace microplastics in wastewater treatment plants: A review of the current knowledge on their analysis approaches. Science of The Total Environment 2020, 745, 140943 .
AMA StylePeiying Kang, Bin Ji, Yaqian Zhao, Ting Wei. How can we trace microplastics in wastewater treatment plants: A review of the current knowledge on their analysis approaches. Science of The Total Environment. 2020; 745 ():140943.
Chicago/Turabian StylePeiying Kang; Bin Ji; Yaqian Zhao; Ting Wei. 2020. "How can we trace microplastics in wastewater treatment plants: A review of the current knowledge on their analysis approaches." Science of The Total Environment 745, no. : 140943.
BACKGROUND Aluminum‐based drinking water treatment residual (Al‐DWTR) has been used as emergent substrates in lab‐scale and pilot‐scale biofiltration systems (biofilters and constructed wetlands (CWs)) for its good affinity for phosphorus (P) adsorption. However, there is a concern about whether P adsorption process will contribute to substrate clogging. Two lab‐scale up‐flow biofiltration systems were set up to identify the contribution of P adsorption process to the clogging under different operation conditions. RESULTS Contributions of individual processes to clogging from biosolids production (SBS, g/d), inert matter generated from the conversion of residual biomass (SIS, g/d), P adsorption (SP, g/d), and inert matter production from influent total suspended solids (SSS, g/d) during the two systems operation were accessed. After the 262‐day operation, results indicated that SBS contributed most proportion (53.16±7.73%) to the clogging, followed by SSS (41.48±8.02%), SP (3.14±0.06%), and SIS (2.20±0.27%) when treating the influent with concentrations of 284‐558 mg/L for COD, 54‐197 mg/L for SS and 5‐13 mg/L for P. CONCLUSIONS The minor contribution of P adsorption process to the substrate clogging further suggests that dewatered Al‐DWTR with a high P removal capacity is a promising substrate used in biofiltration systems. This article is protected by copyright. All rights reserved.
Yan Yang; Jiefu Wang; Yaqian Zhao; Cheng Tang; Ranbin Liu; Cheng Shen. Can phosphorus adsorption clog an alum sludge‐based biofiltration system? Evidence and insight. Journal of Chemical Technology & Biotechnology 2020, 96, 180 -187.
AMA StyleYan Yang, Jiefu Wang, Yaqian Zhao, Cheng Tang, Ranbin Liu, Cheng Shen. Can phosphorus adsorption clog an alum sludge‐based biofiltration system? Evidence and insight. Journal of Chemical Technology & Biotechnology. 2020; 96 (1):180-187.
Chicago/Turabian StyleYan Yang; Jiefu Wang; Yaqian Zhao; Cheng Tang; Ranbin Liu; Cheng Shen. 2020. "Can phosphorus adsorption clog an alum sludge‐based biofiltration system? Evidence and insight." Journal of Chemical Technology & Biotechnology 96, no. 1: 180-187.
Beneficial reuse of drinking water treatment plant residues (WTRs) has been intensively studied worldwide in the last decades, but few engineering applications can be found. The majority of WTRs were directly reused in cake form (after dewatering), e.g., alum sludge cake as main substrate used in constructed wetlands (CWs), or oven dried and ground powdery form, e.g., sorbent for pollutant removal. However, WTRs reuse in such forms has several drawbacks, i.e., difficulty of recovering and easy clogging (in CWs), which result in limited WTRs engineering applications. Granulation or pelleting could widen and be a wiser WTRs reuse route and also seems to be a promising strategy to overcome the “application bottleneck” issues. In the literature, a number of trials of WTRs granulation have been reported since 2008, including sintering ceramsite, gel entrapment and newly emerged techniques. Hence, there is a need to overlook these studies and promote WTRs granulation for further development. To this end, this review firstly provides a piece of updated comprehensive information and critical analysis regarding WTRs granulation/pelleting technology. It aims to enhance WTRs granulation studies in the developing stage and thus enlarge WTRs engineering applications.
Baiming Ren; Yaqian Zhao; Bin Ji; Ting Wei; Cheng Shen. Granulation of Drinking Water Treatment Residues: Recent Advances and Prospects. Water 2020, 12, 1400 .
AMA StyleBaiming Ren, Yaqian Zhao, Bin Ji, Ting Wei, Cheng Shen. Granulation of Drinking Water Treatment Residues: Recent Advances and Prospects. Water. 2020; 12 (5):1400.
Chicago/Turabian StyleBaiming Ren; Yaqian Zhao; Bin Ji; Ting Wei; Cheng Shen. 2020. "Granulation of Drinking Water Treatment Residues: Recent Advances and Prospects." Water 12, no. 5: 1400.
Numerical model as a simulation tool was used to describe the pollutants transformation and degradation process in constructed wetlands (CWs). It can help provide insight into the “black box” and increase the understanding of the complex processes in CWs. In the last few decades, several process-based numerical models were developed to depict the pollutants removal processes in CWs, which include biochemical model, hydraulic model, reactive-transport model, plants model, clogging model, and coupling model combining two or more sub-models. However, there was a long way to go before fully understanding the decontamination mechanisms of CWs. On the one hand, single or a composite model coupling a small number of sub-models cannot fully reveal the decontamination processes. On the other hand, a comprehensive model including all sub-models of current cognition involves numerous parameters, most of which are interaction and cannot quantitatively determined, thus making the model complex and leading to diffuse interaction. Therefore, in order to describe the reaction processes in CWs more accurately, it is expected that all parameters should be quantified as far as possible in the future model. This study aims to provide a review of the numerical models of CWs and to reveal mechanism of decontamination. Based on the advantages and disadvantages of existing models, the study presented the improvement method and future research direction: (1) new detection/monitoring technique or computing method to quantitatively assess the parameters in CWs models, (2) correcting the simulation errors caused by the assumption of Activated Sludge Models (ASMs) and developing a complete biofilm reaction sub-model, (3) simplification of the comprehensive model, and (4) need of emerging pollutants modeling.
Chunbo Yuan; Ting Huang; Xiaohong Zhao; Yaqian Zhao. Numerical Models of Subsurface Flow Constructed Wetlands: Review and Future Development. Sustainability 2020, 12, 3498 .
AMA StyleChunbo Yuan, Ting Huang, Xiaohong Zhao, Yaqian Zhao. Numerical Models of Subsurface Flow Constructed Wetlands: Review and Future Development. Sustainability. 2020; 12 (8):3498.
Chicago/Turabian StyleChunbo Yuan; Ting Huang; Xiaohong Zhao; Yaqian Zhao. 2020. "Numerical Models of Subsurface Flow Constructed Wetlands: Review and Future Development." Sustainability 12, no. 8: 3498.
Nitrogen (N) remains a great challenge in wastewater treatment while attempts to remove N has continuously been a research point for decades. In this study, the long-term performance of four identical-shape denitrification MBBRs (moving bed biofilm reactors) with four different configurations of cylindrical polyethylene as carriers (Φ25 × 12, Φ25 × 4, Φ15 × 15, and Φ10 × 7 mm) for advanced N removal of real reverse osmosis concentrate was investigated in great detail. The N of the real concentrate can be effectively removed by denitrification MBBRs when the pH, temperature, hydraulic retention time (HRT), C/N ratio, and filling rate are 7.50–8.10, 24~26 °C, 12 hours, 6.6, and 50%, respectively. The results showed that the MBBR with the Φ15 × 15 poly-carrier had the best removal efficiency on NO3-–N (78.0 ± 15.8%), NO2-–N (43.79 ± 9.30%), NH4+–N (55.56 ± 22.28%), and TN (68.9 ± 12.4%). The highest biomass of 2.13 mg/g-carrier was in the Φ15 × 15 poly-carrier was compared with the other three carriers, while the genes of the Φ15 × 15 poly-carrier reactor were also the most abundant. Proteobacteria was the most abundant phylum in the system followed by Bacteroidetes and then Firmicutes. The entire experiment with various parameter examination supported that Φ15 × 15 poly-carrier MBBR was a promising system for N removal in high strength concentrate. Despite the lab-scale trial, the successful treatment of high strength real reverse osmosis concentrate demonstrated the reality of the treated effluent as possible reclaimed water, thus providing a good showcase of N-rich reverse osmosis concentrate purification in practical application.
Tong Wang; Tong Wu; Haiyan Wang; Weiyang Dong; Yaqian Zhao; Zhaosheng Chu; Guokai Yan; Yang Chang. Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate. International Journal of Environmental Research and Public Health 2020, 17, 2667 .
AMA StyleTong Wang, Tong Wu, Haiyan Wang, Weiyang Dong, Yaqian Zhao, Zhaosheng Chu, Guokai Yan, Yang Chang. Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate. International Journal of Environmental Research and Public Health. 2020; 17 (8):2667.
Chicago/Turabian StyleTong Wang; Tong Wu; Haiyan Wang; Weiyang Dong; Yaqian Zhao; Zhaosheng Chu; Guokai Yan; Yang Chang. 2020. "Comparative Study of Denitrifying-MBBRs with Different Polyethylene Carriers for Advanced Nitrogen Removal of Real Reverse Osmosis Concentrate." International Journal of Environmental Research and Public Health 17, no. 8: 2667.