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In recent years, many scientific studies have focused their efforts on quantifying the different types of pollutants that are not removed in wastewater treatment plants. Compounds of emerging concern (CECs) have been detected in different natural environments. The presence of these compounds in wastewater is not new, but they may have consequences in the future. These compounds reach the natural environment through various routes, such as wastewater. This review focuses on the study of tertiary treatment with advanced oxidation processes (AOPs) for the degradation of CECs. The main objective of the different existing AOPs applied to the treatment of wastewater is the degradation of pollutants that are not eliminated by means of traditional wastewater treatment.
Laura Bermúdez; Jaime Pascual; María Martínez; Jose Poyatos Capilla. Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art. Water 2021, 13, 2094 .
AMA StyleLaura Bermúdez, Jaime Pascual, María Martínez, Jose Poyatos Capilla. Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art. Water. 2021; 13 (15):2094.
Chicago/Turabian StyleLaura Bermúdez; Jaime Pascual; María Martínez; Jose Poyatos Capilla. 2021. "Effectiveness of Advanced Oxidation Processes in Wastewater Treatment: State of the Art." Water 13, no. 15: 2094.
Valorization of municipal solid waste (MSW) plays a crucial role in a sustainable society and provides an opportunity to reduce carbon emissions. The economic and social viability of the treatment of the organic fraction of MSW (OFMSW) with a multi-scenario analysis (composting and anaerobic digestion for renewable electricity or for biomethane injection into natural gas networks) was studied using a Monte Carlo simulation. The cost of treating organic fraction of MSW to neutralize financial net present value (NPV) and social NPV through greenhouse gas emissions avoided was determined for each scenario. The costs considered were the investment and the operating and maintenance costs. The financial benefits from the revenue of subproducts depended on the scenario. The lowest average fee to neutralize the financial NPV was 6.38 €/tonne treated in anaerobic digestion for biomethane injection into natural gas networks, therefore, it was the most financially viable. The average social NPV calculated for biomethane injection into natural gas networks (16.60 €/tonne) was higher than that obtained for renewable electricity (13.59 €/tonne). According to the results, anaerobic digestion for biomethane injection into natural gas networks is the most socially and economically viable alternative for the treatment of OFMSW.
Jaime Martín-Pascual; José María Fernández-González; Nicolò Ceccomarini; Javier Ordoñez; Montserrat Zamorano. The Study of Economic and Environmental Viability of the Treatment of Organic Fraction of Municipal Solid Waste Using Monte Carlo Simulation. Applied Sciences 2020, 10, 9028 .
AMA StyleJaime Martín-Pascual, José María Fernández-González, Nicolò Ceccomarini, Javier Ordoñez, Montserrat Zamorano. The Study of Economic and Environmental Viability of the Treatment of Organic Fraction of Municipal Solid Waste Using Monte Carlo Simulation. Applied Sciences. 2020; 10 (24):9028.
Chicago/Turabian StyleJaime Martín-Pascual; José María Fernández-González; Nicolò Ceccomarini; Javier Ordoñez; Montserrat Zamorano. 2020. "The Study of Economic and Environmental Viability of the Treatment of Organic Fraction of Municipal Solid Waste Using Monte Carlo Simulation." Applied Sciences 10, no. 24: 9028.
The need for new energy sources and the problems associated with waste in the agroforestry industry are an opportunity for the recovery of this waste. For the use of this agricultural waste as energy, different pretreatments, such as torrefaction, can be carried out. Torrefaction is a thermochemical treatment involving energetic densification of biomass at temperatures ranging from 200 to 300 °C under an inert and anaerobic environment. This study developed a numerical model to evaluate the effect of temperature and residence time of torrefaction on biomass from olive tree waste to determine optimum operative conditions for the process. Four temperatures and four residence times, in the operation range of the process, were tested to determine the weight loss and the higher heating values (HHVs) of the torrefied sample. From these data, a numerical model was developed to infer the complete behavior of the process in the temperature range between 200 and 300 °C and in the residence time range of a few minutes to 2 h. The HHV of the torrefied sample increased at a temperature between 200 and 275 °C. However, from 275 to 300 °C, there was an HHV decrease. The effect of the residence time depended on the torrefaction temperature. At low temperatures, there were no statistically significant differences, although an increase of HHV was detected under 120 min. However, at 250 °C this effect was reversed, and statistically significant differences were not observed between 30 and 120 min. Overall, the increase of temperature in the torrefaction process reduces the residence time needed to achieve the maximum HHV. As a result, the optimum conditions of torrefaction for this biomass were, approximately, 275 °C and 30 min of residence time. This reaction yielded an optimum 5830 cal/g HHV.
Jaime Martín-Pascual; Joaquín Jódar; Miguel Rodríguez; Montserrat Zamorano. Determination of the Optimal Operative Conditions for the Torrefaction of Olive Waste Biomass. Sustainability 2020, 12, 6411 .
AMA StyleJaime Martín-Pascual, Joaquín Jódar, Miguel Rodríguez, Montserrat Zamorano. Determination of the Optimal Operative Conditions for the Torrefaction of Olive Waste Biomass. Sustainability. 2020; 12 (16):6411.
Chicago/Turabian StyleJaime Martín-Pascual; Joaquín Jódar; Miguel Rodríguez; Montserrat Zamorano. 2020. "Determination of the Optimal Operative Conditions for the Torrefaction of Olive Waste Biomass." Sustainability 12, no. 16: 6411.
The organic fraction is usually the predominant fraction in municipal solid waste, so its recycling is a potential alternative to disposal in landfill sites, as well as helping to reach targets included in the European Circular Economy Package. The existing body of knowledge in this research field is very large, so a comprehensive review of the existing scientific literature has been considered of interest to provide researchers and professionals with a detailed understanding of the status quo and predict the dynamic directions of this field. A systematic literature review and bibliometric analysis have been performed to provide objective criteria for evaluating the work carried out by researchers and a macroscopic overview of the existing body of knowledge in this field. The analysis of 452 scientific articles published from 1980 to 2019 has shown that the application of composting technologies is relevant, especially since 2014, when policies aimed at reducing emissions to the atmosphere were increased and focused on the use of this waste fraction to produce biogas. Nevertheless, the scientific field is still evolving to impose a model of a circular economy; in fact, emerging studies are being conducted on the production of biomethane, contributing to the decarbonised energy system.
José Fernández-González; Carmen Díaz-López; Jaime Martín-Pascual; Montserrat Zamorano. Recycling Organic Fraction of Municipal Solid Waste: Systematic Literature Review and Bibliometric Analysis of Research Trends. Sustainability 2020, 12, 4798 .
AMA StyleJosé Fernández-González, Carmen Díaz-López, Jaime Martín-Pascual, Montserrat Zamorano. Recycling Organic Fraction of Municipal Solid Waste: Systematic Literature Review and Bibliometric Analysis of Research Trends. Sustainability. 2020; 12 (11):4798.
Chicago/Turabian StyleJosé Fernández-González; Carmen Díaz-López; Jaime Martín-Pascual; Montserrat Zamorano. 2020. "Recycling Organic Fraction of Municipal Solid Waste: Systematic Literature Review and Bibliometric Analysis of Research Trends." Sustainability 12, no. 11: 4798.
The challenge of sustainable cities involves rethinking some infrastructure systems and supply chains, including those for energy and waste. In this sense, the injection of green gas as biomethane into the natural gas network could contribute to the reduction of waste in landfills and to the decarbonisation of energy systems. Positive and negative aspects of this challenge have been identified and quantified in comparison with traditional composting and biogas production for electricity, in order to give guidelines to overcome the obstacles that its use shows nowadays. For this, an integrated analytic hierarchy process – strengths, weaknesses, opportunities and threats (AHP-SWOT) analysis, supported by a panel of experts, has been applied. Results have shown the strength derived from the environmental and economic benefits obtained from the by-products, as well as the opportunity of biogas for electricity and biomethane production to generate positive effects on climate change, although the investment and exploitation costs could threaten its implementation. It has been possible to conclude that the use of biomethane in gas networks shows a greater flexibility of use and avoided emissions, so it can become an alternative. Nevertheless, its implementation needs promotion from governments as well as a regulatory framework to support it.
J.M. Fernández-González; J. Martín-Pascual; M. Zamorano. Biomethane injection into natural gas network vs composting and biogas production for electricity in Spain: An analysis of key decision factors. Sustainable Cities and Society 2020, 60, 102242 .
AMA StyleJ.M. Fernández-González, J. Martín-Pascual, M. Zamorano. Biomethane injection into natural gas network vs composting and biogas production for electricity in Spain: An analysis of key decision factors. Sustainable Cities and Society. 2020; 60 ():102242.
Chicago/Turabian StyleJ.M. Fernández-González; J. Martín-Pascual; M. Zamorano. 2020. "Biomethane injection into natural gas network vs composting and biogas production for electricity in Spain: An analysis of key decision factors." Sustainable Cities and Society 60, no. : 102242.
Over the last years, an increasing concern has emerged regarding the eco-friendly management of wastewater. Apart from the role of wastewater treatment plants (WWTPs) for wastewater and sewage sludge treatment, the increasing need of the recovery of the resources contained in wastewater, such as nutrients and water, should be highlighted. This would allow for transforming a wastewater treatment plant (WWTP) into a sustainable technological system. The objective of this review is to propose a moving bed biofilm reactor (MBBR) as a novel technology that contributes to the circularity of the wastewater treatment sector according to the principles of circular economy. In this regard, this paper aims to consider the MBBR process as the initial step for water reuse, and nutrient removal and recovery, within the circular economy model.
J.C. Leyva-Díaz; A. Monteoliva-García; J. Martín-Pascual; M.M. Munio; J.J. García-Mesa; J.M. Poyatos. Moving bed biofilm reactor as an alternative wastewater treatment process for nutrient removal and recovery in the circular economy model. Bioresource Technology 2019, 299, 122631 .
AMA StyleJ.C. Leyva-Díaz, A. Monteoliva-García, J. Martín-Pascual, M.M. Munio, J.J. García-Mesa, J.M. Poyatos. Moving bed biofilm reactor as an alternative wastewater treatment process for nutrient removal and recovery in the circular economy model. Bioresource Technology. 2019; 299 ():122631.
Chicago/Turabian StyleJ.C. Leyva-Díaz; A. Monteoliva-García; J. Martín-Pascual; M.M. Munio; J.J. García-Mesa; J.M. Poyatos. 2019. "Moving bed biofilm reactor as an alternative wastewater treatment process for nutrient removal and recovery in the circular economy model." Bioresource Technology 299, no. : 122631.
The main aim of this study has been to determine the influence of total water to cement ratio, recycled fine aggregate from construction and demolition waste, and air entraining/plasticizer admixture on the properties of masonry mortar. Two mortar series were prepared using varying percentages of dry or pre-soaked recycled fine aggregate to replace natural fine aggregate, and four different dosages of air entraining/plasticizer admixture. Data were analysed using three-way and one-way ANOVA, in order to determine the effect of the factors and to compare the means of the mortars manufactured. The results showed the technical feasibility of masonry mortars manufactured with up to 100% of recycled fine aggregate. In addition, total water to cement ratio was the most determining factor for consistency, dry bulk density, and compressive and flexural strength; the recycled fine aggregate for bulk density; and the air entraining/plasticizer admixture for air content and capillary water absorption coefficient.
Gloria M. Cuenca-Moyano; Jaime Martín-Pascual; María Martín-Morales; Ignacio Valverde-Palacios; Montserrat Zamorano. Effects of water to cement ratio, recycled fine aggregate and air entraining/plasticizer admixture on masonry mortar properties. Construction and Building Materials 2019, 230, 116929 .
AMA StyleGloria M. Cuenca-Moyano, Jaime Martín-Pascual, María Martín-Morales, Ignacio Valverde-Palacios, Montserrat Zamorano. Effects of water to cement ratio, recycled fine aggregate and air entraining/plasticizer admixture on masonry mortar properties. Construction and Building Materials. 2019; 230 ():116929.
Chicago/Turabian StyleGloria M. Cuenca-Moyano; Jaime Martín-Pascual; María Martín-Morales; Ignacio Valverde-Palacios; Montserrat Zamorano. 2019. "Effects of water to cement ratio, recycled fine aggregate and air entraining/plasticizer admixture on masonry mortar properties." Construction and Building Materials 230, no. : 116929.
Numerous studies have analyzed the viability of the biodegradation and removal of different compounds of emerging concern in biological systems for wastewater treatment. However, the effect on the heterotrophic biomass of organic matter removal is sometimes missed. The aim of the present research was to study the effect of the addition of a mix of three pharmaceuticals (carbamazepine, ciprofloxacin, and ibuprofen) on the behavior of the biomass in two different membrane-based biological systems treating urban wastewater. The present research studied a membrane bioreactor (MBR) pilot plant operating at a similar mixed liquor suspended solids (MLSS) concentration (about 5.5 g/L). This system works as an MBR and is combined with a moving bed biofilm reactor (MBBR-MBR) to treat real urban wastewater at 6 and 10 h of hydraulic retention time (HRT) under three different shocks of pharmaceuticals with increasing concentrations. In all cases, the organic matter removal was, in average terms, higher than about 92% of biochemical oxygen demand on the fifth day (BOD5), 79% of chemical oxygen demand (COD), and 85% of total organic carbon (TOC). Nevertheless, the removal is higher in the MBBR-MBR technology under the same HRT and the MLSS is similar. Moreover, the removal increased during the shock of pharmaceutical compounds, especially in the MBR technology. From a kinetic perspective, MBBR-MBR is more suitable for low HRT (6 h) and MBR is more effective for high HRT (10 h). This could be due to the fact that biofilm systems are less sensitive to hostile environments than the MBR systems. The removal of N-NH4+ decreased considerably when the pharmaceutical compounds mix was introduced into the system until no removal was detected in cycle 1, even when biofilm was present.
Antonio Monteoliva-García; Juan Carlos Leyva-Díaz; Cristina López-López; José Manuel Poyatos; María Del Mar Muñío; Jaime Martín-Pascual. Heterotrophic Kinetic Study and Nitrogen Removal of a Membrane Bioreactor System Treating Real Urban Wastewater under a Pharmaceutical Compounds Shock: Effect of the Operative Variables. Water 2019, 11, 1785 .
AMA StyleAntonio Monteoliva-García, Juan Carlos Leyva-Díaz, Cristina López-López, José Manuel Poyatos, María Del Mar Muñío, Jaime Martín-Pascual. Heterotrophic Kinetic Study and Nitrogen Removal of a Membrane Bioreactor System Treating Real Urban Wastewater under a Pharmaceutical Compounds Shock: Effect of the Operative Variables. Water. 2019; 11 (9):1785.
Chicago/Turabian StyleAntonio Monteoliva-García; Juan Carlos Leyva-Díaz; Cristina López-López; José Manuel Poyatos; María Del Mar Muñío; Jaime Martín-Pascual. 2019. "Heterotrophic Kinetic Study and Nitrogen Removal of a Membrane Bioreactor System Treating Real Urban Wastewater under a Pharmaceutical Compounds Shock: Effect of the Operative Variables." Water 11, no. 9: 1785.
This study focuses on the use of advanced oxidation processes as a tertiary treatment in wastewater treatment plants to degrade contaminants of emerging concern at the natural pH of the biologically treated wastewater. Different peroxide dosages and initial concentrations of a mix of three pharmaceuticals commonly present in wastewater (carbamazepine, ciprofloxacin and ibuprofen) were tested in a batch photoreactor. The addition of Fe2+ and TiO2 as catalysts was also tested with the aim of improving the degradation rate of the pharmaceuticals. Among the contaminants tested, ciprofloxacin was the pollutant that showed the best degradation. It was completely removed from water after 20 min of treatment under any of the experimental conditions assessed. High degradation percentages, between 89.83 and 100%, were achieved for ibuprofen, while carbamazepine shows the lowest degradation, ranging from 80.14 to 100%. In terms of global efficiency, a complete degradation was achieved when the concentration of the tested contaminants was similar to current concentration levels in urban wastewater effluents. The addition of the catalysts did not significantly improve the degradation rates.
A. Monteoliva-García; J. Martín-Pascual; M. M. Muñío; J. M. Poyatos. Removal of carbamazepine, ciprofloxacin and ibuprofen in real urban wastewater by using light-driven advanced oxidation processes. International Journal of Environmental Science and Technology 2019, 16, 6005 -6018.
AMA StyleA. Monteoliva-García, J. Martín-Pascual, M. M. Muñío, J. M. Poyatos. Removal of carbamazepine, ciprofloxacin and ibuprofen in real urban wastewater by using light-driven advanced oxidation processes. International Journal of Environmental Science and Technology. 2019; 16 (10):6005-6018.
Chicago/Turabian StyleA. Monteoliva-García; J. Martín-Pascual; M. M. Muñío; J. M. Poyatos. 2019. "Removal of carbamazepine, ciprofloxacin and ibuprofen in real urban wastewater by using light-driven advanced oxidation processes." International Journal of Environmental Science and Technology 16, no. 10: 6005-6018.
A bench‐scale bioreactor was operated under two different technologies of membrane bioreactor and hybrid moving bed bioreactor‐membrane bioreactor at hydraulic retention time 6‐16 h, sludge retention time 6‐24 d and mixed liquor suspended solids 3400‐7800 mg L‐1. Analyses of their bacterial community structures showed marked differences between the two technologies for global communities but not for dominant phylotypes, and the domination of different bacterial phylotypes for the different operational conditions. Tetrasphaera genus was ubiquitous (1.1‐19.2% relative abundance) in both bioprocesses. Fodinibacter (0.04‐7.75%) was found to positively correlate with other dominant phylotypes, highlighting the relevance of Intrasporangiaceae family in membrane‐based technologies. Oligotypes distribution of dominant phylotypes showed that certain strains were favored at all operational conditions. Linkage with operational conditions determined that the presence/absence of carriers deeply impacted the relative abundance of dominant phylotypes. The results are relevant to discern the effect of operational conditions over bacterial communities in membrane‐based technologies. This article is protected by copyright. All rights reserved.
Alejandro Rodriguez-Sanchez; Gustavo Calero-Diaz; Jaime Martin-Pascual; Cristina Lopez-Lopez; Juan Carlos Torres; Jose Manuel Poyatos. Insight on the bacterial ecology in membrane bioreactor: Operational conditions effect over dominant ecological players. AIChE Journal 2018, 65, 536 -548.
AMA StyleAlejandro Rodriguez-Sanchez, Gustavo Calero-Diaz, Jaime Martin-Pascual, Cristina Lopez-Lopez, Juan Carlos Torres, Jose Manuel Poyatos. Insight on the bacterial ecology in membrane bioreactor: Operational conditions effect over dominant ecological players. AIChE Journal. 2018; 65 (2):536-548.
Chicago/Turabian StyleAlejandro Rodriguez-Sanchez; Gustavo Calero-Diaz; Jaime Martin-Pascual; Cristina Lopez-Lopez; Juan Carlos Torres; Jose Manuel Poyatos. 2018. "Insight on the bacterial ecology in membrane bioreactor: Operational conditions effect over dominant ecological players." AIChE Journal 65, no. 2: 536-548.
Primary settling tanks are used to remove solids at wastewater treatment plants and are considered a fundamental part in their joint operation with the biological and sludge treatment processes. The aim of this study was to obtain a greater understanding of the influence of operational parameters, such as surface overflow rate, hydraulic retention time, and temperature, on the removal efficiency of suspended solids and organic matter by the measurement of chemical oxygen demand and biochemical oxygen demand in the primary sedimentation process. The research was carried out in a semi-technical primary settling tank which was fed with real wastewater from a wastewater treatment plant. The physical process was strictly controlled and without the intervention of chemical additives. Three cycles of operation were tested in relation to the surface overflow rate, in order to check their influence on the different final concentrations. The results obtained show that the elimination efficiency can be increased by 11% for SS and 9% for chemical oxygen demand and biochemical oxygen demand, for variations in the surface overflow rate of around ±0.6 m3/m2·h and variations in hydraulic retention time of around ±2 h. The results also show that current design criteria are quite conservative. An empirical mathematical model was developed in this paper relating SS removal efficiency to q, influent SS concentration, and sewage temperature.
Margarita Jover-Smet; Jaime Martín-Pascual; Arturo Trapote. Model of Suspended Solids Removal in the Primary Sedimentation Tanks for the Treatment of Urban Wastewater. Water 2017, 9, 448 .
AMA StyleMargarita Jover-Smet, Jaime Martín-Pascual, Arturo Trapote. Model of Suspended Solids Removal in the Primary Sedimentation Tanks for the Treatment of Urban Wastewater. Water. 2017; 9 (6):448.
Chicago/Turabian StyleMargarita Jover-Smet; Jaime Martín-Pascual; Arturo Trapote. 2017. "Model of Suspended Solids Removal in the Primary Sedimentation Tanks for the Treatment of Urban Wastewater." Water 9, no. 6: 448.
Highlights•Temperature and flux were the most influential variables in the membrane performance.•Biofilm density in the MBBR-MBR increased transmembrane pressure.•The presence of biofilm increased the fouling rate. AbstractThe influence of operative variables in the performance of an ultrafiltration membrane in a hybrid moving bed membrane bioreactor treating real urban wastewater was studied in relation to the fouling rate and the recovery of permeability with a multivariable statistical analysis. Twenty-one cycles of operation were studied in relation to the filling ratio, flux, temperature, biomass concentration in a pilot-scale experimental plant. The pilot plant consisted of three units of ZW-10 submerged membrane and 20, 35 and 50% of K1 of Anoxkaldnes were used as carrier. The statistical analysis has shown that the most influential variables in the performance of the membrane were temperature and flux. Transmembrane pressure ranged from 22 kPa to 68 kPa, increasing with the MLSS, BFSS and flux and decreasing with temperature. The presence of biofilm negatively affected the performance of the membrane in relation to the fouling rate; this varied between 0.26 and 1.22 kPa/day, and was found to increase when viscosity and BFSS increased and temperature decreased.
Jaime Martín-Pascual; Patricia Reboleiro-Rivas; María M. Muñio; Jesús González-López; Jose Manuel Poyatos. Membrane fouling of a hybrid moving bed membrane bioreactor plant to treat real urban wastewater. Chemical Engineering and Processing - Process Intensification 2016, 104, 112 -119.
AMA StyleJaime Martín-Pascual, Patricia Reboleiro-Rivas, María M. Muñio, Jesús González-López, Jose Manuel Poyatos. Membrane fouling of a hybrid moving bed membrane bioreactor plant to treat real urban wastewater. Chemical Engineering and Processing - Process Intensification. 2016; 104 ():112-119.
Chicago/Turabian StyleJaime Martín-Pascual; Patricia Reboleiro-Rivas; María M. Muñio; Jesús González-López; Jose Manuel Poyatos. 2016. "Membrane fouling of a hybrid moving bed membrane bioreactor plant to treat real urban wastewater." Chemical Engineering and Processing - Process Intensification 104, no. : 112-119.
The present research studies the influence of the operative variable of a hybrid moving bed biofilm reactor–membrane bioreactor (hybrid MBBR–MBR) in the attached biomass, and analyses the effect of the variables on the evolution of solids retention time (SRT) treating real urban wastewater in a pilot-scale experimental plant. This was operated under mixed liquor suspended solids (MLSSs) between 2,414 ± 166 and 4,594 ± 47 mg/L, the temperature ranged between 5.00 ± 1.58 and 27.88 ± 1.52°C and the regimes of 10 and 24 h HRT with 20, 35 and 50% of the filling ratio. The biofilm density changes between 2,618 ± 272 and 6,991 ± 843 mg/L of the carrier show statistically significant differences in relation to the operative variables, so it depends mainly on MLSS and temperature, and is not dependent on the filling ratio under the condition studied. The multivariable analysis showed that the most influential operative variables in the SRT were MLSS and temperature, so two models have been proposed to consider these effects. The SRT can be modelled in relation to the HRT and MLSS throughout the F/M rate with the hyperbola for 20, 35 and 50% of the filling ratio, respectively. In relation to the temperature, the SRT increases linearly with it between approximately 5 and 30°C with linear coefficients that also increase with the filling ratio presenting the values of 0.2825, 0.3438 and 0.4615 d/°C to 20, 35 and 50% of the filling ratio, respectively.
J. Martín-Pascual; M.M. Muñío; Jose Manuel Poyatos. Behaviour of the solids retention time in relation to the operative variables in a hybrid moving bed membrane bioreactor treating urban wastewater. DESALINATION AND WATER TREATMENT 2015, 57, 19573 -19581.
AMA StyleJ. Martín-Pascual, M.M. Muñío, Jose Manuel Poyatos. Behaviour of the solids retention time in relation to the operative variables in a hybrid moving bed membrane bioreactor treating urban wastewater. DESALINATION AND WATER TREATMENT. 2015; 57 (42):19573-19581.
Chicago/Turabian StyleJ. Martín-Pascual; M.M. Muñío; Jose Manuel Poyatos. 2015. "Behaviour of the solids retention time in relation to the operative variables in a hybrid moving bed membrane bioreactor treating urban wastewater." DESALINATION AND WATER TREATMENT 57, no. 42: 19573-19581.
Studies investigating the functioning and possible utility of new wastewater treatment technologies are urgently needed if the requirements of European Directive 91/271/EEC are to be met. Here, moving bed biofilm reactor-membrane bioreactor (MBBR-MBR) technology was studied in a pilot plant of 445 L volume with ultrafiltration membrane (ZW-10) under 10 h and 24 h of hydraulic retention time (HRT) and three filling ratios (20 %, 35 % and 50 %) at temperatures between 2.5 °C and 17.3 °C. Biofilm density ranged between 1510 ± 127 and 3775 ± 247 mg/L carrier. Temperature was the operative variable with most influence in the behaviour of biomass and in organic matter and nitrogen oxidation whereas the filling ratio affected mainly biofilm density. Removal of organic matter and nitrogen increased with the amount of biofilm in the carrier. The amount of biofilm attached under the highest filling ratio was reduced as a consequence of increased collision between carriers, indicating that an optimum rate of filling ratio in this process can be determined. The organic matter removal rate reached 86.4 % and 91.5 % in terms of COD and BOD5, respectively, and no less than 13.9 % and 13.7 % ammonia and total nitrogen content, respectively, was removed by the system.
Jaime Martín-Pascual; Juan Carlos Leyva-Díaz; Jose Manuel Poyatos; José Manuel Poyatos Capilla. Treatment of urban wastewater with pure moving bed membrane bioreactor technology at different filling ratios, hydraulic retention times and temperatures. Annals of Microbiology 2015, 66, 607 -613.
AMA StyleJaime Martín-Pascual, Juan Carlos Leyva-Díaz, Jose Manuel Poyatos, José Manuel Poyatos Capilla. Treatment of urban wastewater with pure moving bed membrane bioreactor technology at different filling ratios, hydraulic retention times and temperatures. Annals of Microbiology. 2015; 66 (2):607-613.
Chicago/Turabian StyleJaime Martín-Pascual; Juan Carlos Leyva-Díaz; Jose Manuel Poyatos; José Manuel Poyatos Capilla. 2015. "Treatment of urban wastewater with pure moving bed membrane bioreactor technology at different filling ratios, hydraulic retention times and temperatures." Annals of Microbiology 66, no. 2: 607-613.
Textile wastewater is one of the main environmental pollutants which exist in our society. Textile effluents cause great concern due to the alteration of properties of water bodies such as differences in temperature, organic load, pH, colour and turbidity. Turbidity is one of the most important parameters that should be removed from industrial wastewater because the penetration of ultraviolet (UV) light into the water body can be affected. As a consequence, the main aim of this research was to study the improvements of the efficiency of advanced oxidation processes (AOPs) with the introduction of a coagulation–flocculation (CF) as a pre-treatment to remove the turbidity of textile wastewater. The experiments were carried out with five industrial coagulants under different concentrations. The turbidity was removed to a level of almost 99% with one of the coagulants (FLOCUSOL-PA/18). The total organic carbon (TOC) and colour removals were studied for each AOP after the CF process in this research. The colour removal was almost 100% for all AOPs. The higher values of TOC and turbidity removals were 94.2 and 6.9%, respectively, with the heterogeneous photocatalysis process. The data show that the use of CF as a pre-treatment of the influent with turbidity improves the efficiency of the AOP.
Cristina Lopez-Lopez; Jaime Martín-Pascual; Juan Carlos Leyva-Díaz; Maria V. Martinez-Toledo; María M. Muñio; Jose Manuel Poyatos. Combined treatment of textile wastewater by coagulation–flocculation and advanced oxidation processes. DESALINATION AND WATER TREATMENT 2015, 57, 1 -8.
AMA StyleCristina Lopez-Lopez, Jaime Martín-Pascual, Juan Carlos Leyva-Díaz, Maria V. Martinez-Toledo, María M. Muñio, Jose Manuel Poyatos. Combined treatment of textile wastewater by coagulation–flocculation and advanced oxidation processes. DESALINATION AND WATER TREATMENT. 2015; 57 (30):1-8.
Chicago/Turabian StyleCristina Lopez-Lopez; Jaime Martín-Pascual; Juan Carlos Leyva-Díaz; Maria V. Martinez-Toledo; María M. Muñio; Jose Manuel Poyatos. 2015. "Combined treatment of textile wastewater by coagulation–flocculation and advanced oxidation processes." DESALINATION AND WATER TREATMENT 57, no. 30: 1-8.
J.C. Leyva-Díaz; C. López-López; Jaime Martin Pascual; M.M. Muñío; Jose Manuel Poyatos. Kinetic study of the combined processes of a membrane bioreactor and a hybrid moving bed biofilm reactor-membrane bioreactor with advanced oxidation processes as a post-treatment stage for wastewater treatment. Chemical Engineering and Processing - Process Intensification 2015, 91, 57 -66.
AMA StyleJ.C. Leyva-Díaz, C. López-López, Jaime Martin Pascual, M.M. Muñío, Jose Manuel Poyatos. Kinetic study of the combined processes of a membrane bioreactor and a hybrid moving bed biofilm reactor-membrane bioreactor with advanced oxidation processes as a post-treatment stage for wastewater treatment. Chemical Engineering and Processing - Process Intensification. 2015; 91 ():57-66.
Chicago/Turabian StyleJ.C. Leyva-Díaz; C. López-López; Jaime Martin Pascual; M.M. Muñío; Jose Manuel Poyatos. 2015. "Kinetic study of the combined processes of a membrane bioreactor and a hybrid moving bed biofilm reactor-membrane bioreactor with advanced oxidation processes as a post-treatment stage for wastewater treatment." Chemical Engineering and Processing - Process Intensification 91, no. : 57-66.
The application of H2O2/UV, photo-Fenton and heterogeneous photocatalysis (TiO2/H2O2/UV) processes for the treatment of a highly polluted coloured wastewater was analysed. The experiments were carried out with different H2O2 concentrations (0.25, 0.5, 1, 2 and 5 g/L). The toxic properties of different H2O2 concentrations in textile wastewater were tested by the use of a Microtox bioassay with Vibrio fischeri. The efficiency of the process was checked by assessing the physicochemical parameters, total organic carbon (TOC) and colour. The use of TiO2 as a catalyst with UV photolysis was the most effective method to remove toxins, organic material and colour using the five concentrations of H2O2 tested. By using 5 g/L of H2O2, 94% TOC removal was achieved. In relation to colour removal, this was greater than 99% with 5 g/L of H2O2 in all three processes. The use of a catalyst allowed us to reduce the hydraulic retention time of the process to 30 min with Fe2+ and 45 min with TiO2. Controlling the amount of H2O2 used as the oxidant in an advanced oxidation process (AOP) is important since it was found to increase the toxicity of the influent with the addition of H2O2 by 4.99 ± 1.48%, 27.4 ± 3.24%, 39.16 ± 5.64%, 53.40 ± 4.15% and 59.39 ± 4.67% with 0.25, 0.5, 1, 2 and 5 g/L H2O2, respectively. Therefore, under the studied conditions, an H2O2 concentration greater than 1 g/L is not recommended for an AOP in order to avoid an excess of H2O2 in the effluent.
C. López-López; J. Purswani; Jaime Martin Pascual; M.V. Martinez-Toledo; M.M. Muñío; Jose Manuel Poyatos. Toxic effect of H2O2in H2O2/UV, photo-Fenton and heterogeneous photocatalysis (TiO2/H2O2/UV) systems to treat textile wastewater. DESALINATION AND WATER TREATMENT 2014, 1 -10.
AMA StyleC. López-López, J. Purswani, Jaime Martin Pascual, M.V. Martinez-Toledo, M.M. Muñío, Jose Manuel Poyatos. Toxic effect of H2O2in H2O2/UV, photo-Fenton and heterogeneous photocatalysis (TiO2/H2O2/UV) systems to treat textile wastewater. DESALINATION AND WATER TREATMENT. 2014; ():1-10.
Chicago/Turabian StyleC. López-López; J. Purswani; Jaime Martin Pascual; M.V. Martinez-Toledo; M.M. Muñío; Jose Manuel Poyatos. 2014. "Toxic effect of H2O2in H2O2/UV, photo-Fenton and heterogeneous photocatalysis (TiO2/H2O2/UV) systems to treat textile wastewater." DESALINATION AND WATER TREATMENT , no. : 1-10.
J.C. Leyva-Díaz; J. Martín-Pascual; M.M. Muñío; J. González-López; E. Hontoria; J.M. Poyatos. Comparative kinetics of hybrid and pure moving bed reactor-membrane bioreactors. Ecological Engineering 2014, 70, 227 -234.
AMA StyleJ.C. Leyva-Díaz, J. Martín-Pascual, M.M. Muñío, J. González-López, E. Hontoria, J.M. Poyatos. Comparative kinetics of hybrid and pure moving bed reactor-membrane bioreactors. Ecological Engineering. 2014; 70 ():227-234.
Chicago/Turabian StyleJ.C. Leyva-Díaz; J. Martín-Pascual; M.M. Muñío; J. González-López; E. Hontoria; J.M. Poyatos. 2014. "Comparative kinetics of hybrid and pure moving bed reactor-membrane bioreactors." Ecological Engineering 70, no. : 227-234.
Effects of temperature on the permeate flux and the permeability of the membrane have been studied in a membrane bioreactor system with a moving bed pilot plant to treat real urban wastewater. In the present study, the permeability of the membrane has been determined under four different suspended solids concentrations and three different degrees of fouling in order to compare the effects of the temperature in different operational conditions. The permeate flux, critical flux and permeability of the membrane at seven different temperatures between 10 and 35°C have been checked. The study showed that the permeate flux increased to 19.2 and 21.2% between 10 and 15°C and between 15 and 20°C respectively, which was higher than the 8.70% obtained between 20 and 25°C, and similarly it increased to 15.6 and 15.6% obtained between 25 and 30°C and between 30 and 35°C, respectively. This trend has been also observed in critical flux values, under the different conditions of suspended solids and fouling degree tested. The data obtained on the permeability of the membrane was fitted to a multiple linear regression using dynamic viscosity and temperature as independent variables.
Jaime Martin Pascual; J.C. Leyva-Díaz; C. López-López; M.M. Muñío; E. Hontoria; Jose Manuel Poyatos. Effects of temperature on the permeability and critical flux of the membrane in a moving bed membrane bioreactor. DESALINATION AND WATER TREATMENT 2013, 53, 3439 -3448.
AMA StyleJaime Martin Pascual, J.C. Leyva-Díaz, C. López-López, M.M. Muñío, E. Hontoria, Jose Manuel Poyatos. Effects of temperature on the permeability and critical flux of the membrane in a moving bed membrane bioreactor. DESALINATION AND WATER TREATMENT. 2013; 53 (13):3439-3448.
Chicago/Turabian StyleJaime Martin Pascual; J.C. Leyva-Díaz; C. López-López; M.M. Muñío; E. Hontoria; Jose Manuel Poyatos. 2013. "Effects of temperature on the permeability and critical flux of the membrane in a moving bed membrane bioreactor." DESALINATION AND WATER TREATMENT 53, no. 13: 3439-3448.
J.C. Leyva-Díaz; J. Martín-Pascual; J. González-López; E. Hontoria; J.M. Poyatos. Effects of scale-up on a hybrid moving bed biofilm reactor – membrane bioreactor for treating urban wastewater. Chemical Engineering Science 2013, 104, 808 -816.
AMA StyleJ.C. Leyva-Díaz, J. Martín-Pascual, J. González-López, E. Hontoria, J.M. Poyatos. Effects of scale-up on a hybrid moving bed biofilm reactor – membrane bioreactor for treating urban wastewater. Chemical Engineering Science. 2013; 104 ():808-816.
Chicago/Turabian StyleJ.C. Leyva-Díaz; J. Martín-Pascual; J. González-López; E. Hontoria; J.M. Poyatos. 2013. "Effects of scale-up on a hybrid moving bed biofilm reactor – membrane bioreactor for treating urban wastewater." Chemical Engineering Science 104, no. : 808-816.