This page has only limited features, please log in for full access.

Unclaimed
Probir Das
Center for Sustainable Development, College of Arts and Sciences, Qatar University, Doha 2713, Qatar

Basic Info

Basic Info is private.

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Review
Published: 25 December 2020 in Water
Reads 0
Downloads 0

The treatment of different types of wastewater by physicochemical or biological (non-microalgal) methods could often be either inefficient or energy-intensive. Microalgae are ubiquitous microscopic organisms, which thrive in water bodies that contain the necessary nutrients. Wastewaters are typically contaminated with nitrogen, phosphorus, and other trace elements, which microalgae require for their cell growth. In addition, most of the microalgae are photosynthetic in nature, and these organisms do not require an organic source for their proliferation, although some strains could utilize organics both in the presence and absence of light. Therefore, microalgal bioremediation could be integrated with existing treatment methods or adopted as the single biological method for efficiently treating wastewater. This review paper summarized the mechanisms of pollutants removal by microalgae, microalgal bioremediation potential of different types of wastewaters, the potential application of wastewater-grown microalgal biomass, existing challenges, and the future direction of microalgal application in wastewater treatment.

ACS Style

Hareb Al-Jabri; Probir Das; Shoyeb Khan; Mahmoud Thaher; Mohammed Abdulquadir. Treatment of Wastewaters by Microalgae and the Potential Applications of the Produced Biomass—A Review. Water 2020, 13, 27 .

AMA Style

Hareb Al-Jabri, Probir Das, Shoyeb Khan, Mahmoud Thaher, Mohammed Abdulquadir. Treatment of Wastewaters by Microalgae and the Potential Applications of the Produced Biomass—A Review. Water. 2020; 13 (1):27.

Chicago/Turabian Style

Hareb Al-Jabri; Probir Das; Shoyeb Khan; Mahmoud Thaher; Mohammed Abdulquadir. 2020. "Treatment of Wastewaters by Microalgae and the Potential Applications of the Produced Biomass—A Review." Water 13, no. 1: 27.

Journal article
Published: 28 September 2020 in Science of The Total Environment
Reads 0
Downloads 0

This study investigated the feasibility of microalgal biomass production using waste nitrogen fertilizers (WNFs) generated by the Qatar Fertiliser Company (QAFCO). From the plant, three types of WNFs (WNF1, WNF2, and WNF3) were collected; WNF1 and WNF2 had high solubility (e.g., 1000 g/L) whereas WNF3 had low solubility (65 g/L). For a lower dosage (i.e., 100 mg N/L) of these WNFs, >98% of nitrogen was soluble in water for WNF1 and WNF2; however, 52 mg N/L was soluble for WNF3. Nitrogen content in these wastes was 44, 43, and 39% for WNF1, WNF2, and WNF3, respectively. As these WNFs were used as the sole nitrogen source to grow Tetraselmis sp., Picochlorum sp., and Synechococcus sp., Tetraselmis sp. could utilize all the three WNFs more efficiently than other two strains. The biomass yield of Tetraselmis sp. in a 100,000 L raceway pond was 0.58 g/L and 0.67 g/L for mixed WNFs (all WNF in equal ratio) and urea, respectively. The metabolite profiles of Tetraselmis sp. biomass grown using mixed WNFs were very similar to the biomass obtained from urea-added culture – suggesting that WNFs produced Tetraselmis sp. biomass could be used as animal feed ingredients. Life cycle impact assessment (LCIA) was conducted for six potential scenarios, using the data from the outdoor cultivation. The production of Tetraselmis sp. biomass in QAFCO premises using its WNFs, flue gas, and waste heat could not only eliminate the consequences of landfilling WNFs but also would improve the energy, cost, and environmental burdens of microalgal biomass production.

ACS Style

Hareb Al-Jabri; Probir Das; Mahmoud Thaher; Shoyeb Khan; Mohammad AbdulQuadir. Potential utilization of waste nitrogen fertilizer from a fertilizer industry using marine microalgae. Science of The Total Environment 2020, 755, 142532 .

AMA Style

Hareb Al-Jabri, Probir Das, Mahmoud Thaher, Shoyeb Khan, Mohammad AbdulQuadir. Potential utilization of waste nitrogen fertilizer from a fertilizer industry using marine microalgae. Science of The Total Environment. 2020; 755 ():142532.

Chicago/Turabian Style

Hareb Al-Jabri; Probir Das; Mahmoud Thaher; Shoyeb Khan; Mohammad AbdulQuadir. 2020. "Potential utilization of waste nitrogen fertilizer from a fertilizer industry using marine microalgae." Science of The Total Environment 755, no. : 142532.

Journal article
Published: 28 August 2020 in Chemical Engineering and Processing - Process Intensification
Reads 0
Downloads 0

In this study, a hybrid ultrafiltration–forward osmosis system was compared with a dual stage ultrafiltration process for the harvesting of marine microalgae. To the best of the authors knowledge none of the previous studies compared the performance of a dual stage ultrafiltration process with a hybrid UF-FO process for the harvesting of marine microalgae. The application of the hybrid process is expected to reduce the energy consumption for harvesting the microalgae without affecting the concentration factor and final product quality. In forward osmosis, the impact of the feed and draw solutions flowrate and the membrane orientation was investigated. The feed solutions were unfiltered microalgae solution and ultrafiltered concentrated microalgae while the draw solution was brine collected from a thermal desalination plant. A maximum total algal harvesting concentration factor of 37.3 was obtained using the hybrid ultrafiltration-forward osmosis system and the dual stage ultrafiltration process. The flowrate used in the forward osmosis process was 2.5 LPM for the feed solution and 0.8 LPM for the draw solution and the active layer was facing the feed solution (i.e. FO mode). The energy consumption in the hybrid ultrafiltration-forward osmosis system was 24% less than the dual-stage ultrafiltration system.

ACS Style

Mhd Ammar Hafiz; Alaa H. Hawari; Probir Das; Shoyeb Khan; Ali Altaee. Comparison of dual stage ultrafiltration and hybrid ultrafiltration-forward osmosis process for harvesting microalgae (Tetraselmis sp.) biomass. Chemical Engineering and Processing - Process Intensification 2020, 157, 108112 .

AMA Style

Mhd Ammar Hafiz, Alaa H. Hawari, Probir Das, Shoyeb Khan, Ali Altaee. Comparison of dual stage ultrafiltration and hybrid ultrafiltration-forward osmosis process for harvesting microalgae (Tetraselmis sp.) biomass. Chemical Engineering and Processing - Process Intensification. 2020; 157 ():108112.

Chicago/Turabian Style

Mhd Ammar Hafiz; Alaa H. Hawari; Probir Das; Shoyeb Khan; Ali Altaee. 2020. "Comparison of dual stage ultrafiltration and hybrid ultrafiltration-forward osmosis process for harvesting microalgae (Tetraselmis sp.) biomass." Chemical Engineering and Processing - Process Intensification 157, no. : 108112.

Journal article
Published: 23 January 2020 in Science of The Total Environment
Reads 0
Downloads 0

Hydrothermal Liquefaction (HTL) could be a promising and better alternative to other techniques for energy recovery from municipal sewage sludge (MSS). However, the nutrients (i.e., N, and P) recovery potential from the byproducts, generated in the HTL of MSS, needs to be studied so that a comprehensive sludge management practice could be adopted. In this study, HTL process temperature (275–400 °C), and reaction time (30–120 min) were first investigated for biocrude yield and release of the nutrients to the aqueous phase liquid (APL) and biochar. The maximum energy recovery (i.e., 59%) and maximum energy return on investment (i.e., 3.5) were obtained at 350 °C and 60 min of holding time. With the increase in HTL reaction time, the concentration of nitrogen in the APL increased (5.1 to 6.8 mg/L) while the concentration of phosphorus decreased (0.89 to 0.22 mg/L); the opposite was observed for the biochar. The nutrient recycling efficiency from the APL using microalgae was found to be strain-specific; nitrogen recycling efficiency by Picochlorum sp. and Chlorella sp. were 95.4 and 58.6%, respectively. The APL, derived from 1 kg MSS, could potentially produce 0.49 kg microalgal biomass. Since the concentrations of various metals in the biochar samples were substantially lower compared to their concentrations in raw MSS, the application of biochar as a soil conditioner could be very promising. Overall, net positive energy could be recovered from MSS using the HTL process, while the nutrients in the APL could be used to cultivate specific microalgae, and biochar could be applied to enhance the soil quality.

ACS Style

Probir Das; Shoyeb Khan; Mohammed AbdulQuadir; Mahmoud Thaher; Muhammad Waqas; Ahmed Easa; Essam Shabaan Mohamed Attia; Hareb Al-Jabri. Energy recovery and nutrients recycling from municipal sewage sludge. Science of The Total Environment 2020, 715, 136775 .

AMA Style

Probir Das, Shoyeb Khan, Mohammed AbdulQuadir, Mahmoud Thaher, Muhammad Waqas, Ahmed Easa, Essam Shabaan Mohamed Attia, Hareb Al-Jabri. Energy recovery and nutrients recycling from municipal sewage sludge. Science of The Total Environment. 2020; 715 ():136775.

Chicago/Turabian Style

Probir Das; Shoyeb Khan; Mohammed AbdulQuadir; Mahmoud Thaher; Muhammad Waqas; Ahmed Easa; Essam Shabaan Mohamed Attia; Hareb Al-Jabri. 2020. "Energy recovery and nutrients recycling from municipal sewage sludge." Science of The Total Environment 715, no. : 136775.

Journal article
Published: 25 December 2019 in Energies
Reads 0
Downloads 0

This study reviewed and summarized the literature regarding the use of alcohols during hydrothermal liquefaction (HTL) of algal biomass feedstocks. The use of both pure alcohols and alcohol-water co-solvents were considered. Based upon this review, laboratory experiments were conducted to investigate the impacts of different alcohol co-solvents (ethanol, isopropanol, ethylene glycol, and glycerol) on the HTL treatment of a specific saltwater microalga (Tetraselmis sp.) at two temperatures: 300 °C and 350 °C. Based on their performance, two co-solvents, isopropanol and ethylene glycol, were selected to explore the effects of varying solvent concentrations and reaction temperatures on product yields and biocrude properties. The type and amount of added alcohol did not significantly affect the biocrude yield or composition. Biocrude yields were in the range of 30–35%, while a nearly constant yield of 21% insoluble products was observed, largely resulting from ash constituents within the algal feedstock. The benefits of using alcohol co-solvents (especially isopropanol) were the reduced viscosity of the biocrude products and reduced rates of viscosity increase with biocrude aging. These effects were attributed mainly to the physical properties of the co-solvent mixtures (solubility, polarity, density, etc.) rather than chemical processes. Under the reaction conditions used, there was no evidence that the co-solvents participated in biocrude production by means of hydrogen donation or other chemical processes. Recovery and recycling of the co-solvent present various challenges, depending upon the type and amount of the co-solvent that is used. For example, glycol solvents are recovered nearly completely within the aqueous product stream, whereas simple alcohols are partitioned between the biocrude and aqueous product streams. In commercial applications, the slight benefits provided by the use of co-solvents must be balanced by the challenges of co-solvent recovery and recycling.

ACS Style

Yang Han; Kent Hoekman; Umakanta Jena; Probir Das. Use of Co-Solvents in Hydrothermal Liquefaction (HTL) of Microalgae. Energies 2019, 13, 124 .

AMA Style

Yang Han, Kent Hoekman, Umakanta Jena, Probir Das. Use of Co-Solvents in Hydrothermal Liquefaction (HTL) of Microalgae. Energies. 2019; 13 (1):124.

Chicago/Turabian Style

Yang Han; Kent Hoekman; Umakanta Jena; Probir Das. 2019. "Use of Co-Solvents in Hydrothermal Liquefaction (HTL) of Microalgae." Energies 13, no. 1: 124.

Journal article
Published: 21 October 2019 in Bioresource Technology
Reads 0
Downloads 0

The feasibility of substituting 50% nutrients by aqueous phase liquid (APL), derived from hydrothermal liquefaction of Tetraselmis sp. biomass, in a semi-continuous cultivation of Tetraselmis sp. was studied. Growth experiments were conducted in indoor photobioreactor and outdoor raceway tank for three consecutive cycles. At the end of exponential growth pahse, 75% of the culture was harvested, and the supernatant was returned to the cultivation system. For control cultures, fresh nutrients were added; however, for the experimental cultures, an appropriate volume of APL was added to replace half of the nutrients. Either indoor or outdoor, the growth rate and biomass yield in APL-added cultures were either equal or slightly better compared to control culture; although APL had little to no effect on the metabolite content of Tetraselmis sp., metabolites profile of Tetraselmis sp. varied between APL-added and control cultures. Nevertheless, 50% nutrients requirements for microalgae cultivation could be replaced by APL.

ACS Style

Probir Das; Mohammad AbdulQuadir; Mahmoud Thaher; Shoyeb Khan; Afeefa Kiran Chaudhary; Hareb Al-Jabri. A feasibility study of utilizing hydrothermal liquefaction derived aqueous phase as nutrients for semi-continuous cultivation of Tetraselmis sp. Bioresource Technology 2019, 295, 122310 .

AMA Style

Probir Das, Mohammad AbdulQuadir, Mahmoud Thaher, Shoyeb Khan, Afeefa Kiran Chaudhary, Hareb Al-Jabri. A feasibility study of utilizing hydrothermal liquefaction derived aqueous phase as nutrients for semi-continuous cultivation of Tetraselmis sp. Bioresource Technology. 2019; 295 ():122310.

Chicago/Turabian Style

Probir Das; Mohammad AbdulQuadir; Mahmoud Thaher; Shoyeb Khan; Afeefa Kiran Chaudhary; Hareb Al-Jabri. 2019. "A feasibility study of utilizing hydrothermal liquefaction derived aqueous phase as nutrients for semi-continuous cultivation of Tetraselmis sp." Bioresource Technology 295, no. : 122310.

Journal article
Published: 24 August 2019 in Bioresource Technology
Reads 0
Downloads 0

In this study, the effect of culture salinity (4–6% NaCl) on the harvesting of two microalgal strains (i.e., Picochlorum sp., and Tetraselmis sp.) was investigated using pilot-scale TFF membranes. The cultures of these two strains were collected from their respective continuous cultivation in 2, 25,000 L raceway ponds. For both strains, an increase in culture salinity aggravated the membrane fouling and hence negatively influenced the permeate flux rate, biomass concentrating factor, and energy requirement in biomass harvesting. For the TFF membranes, an increase in 1% NaCl salinity, the volume of processed permeate reduced by 30–44 %, the energy consumption per unit volume of permeate increased by 3–63%, and the biomass concentrating factor reduced by 47–61%.

ACS Style

Probir Das; Mahmoud Thaher; Shoyeb Khan; Mohammad AbdulQuadir; Hareb Al-Jabri. The effect of culture salinity on the harvesting of microalgae biomass using pilot-scale tangential-flow-filter membrane. Bioresource Technology 2019, 293, 122057 .

AMA Style

Probir Das, Mahmoud Thaher, Shoyeb Khan, Mohammad AbdulQuadir, Hareb Al-Jabri. The effect of culture salinity on the harvesting of microalgae biomass using pilot-scale tangential-flow-filter membrane. Bioresource Technology. 2019; 293 ():122057.

Chicago/Turabian Style

Probir Das; Mahmoud Thaher; Shoyeb Khan; Mohammad AbdulQuadir; Hareb Al-Jabri. 2019. "The effect of culture salinity on the harvesting of microalgae biomass using pilot-scale tangential-flow-filter membrane." Bioresource Technology 293, no. : 122057.

Original paper
Published: 05 April 2019 in International Journal of Environmental Science and Technology
Reads 0
Downloads 0

The present study investigated the growth, harvesting, biocrude conversion, and recycling of the HTL aqueous phase for one self-settling (i.e., Chlorocystis sp.) and another non-settling (i.e., Picochlorum sp.) marine microalgae. Both the strains were grown simultaneously in 2 identical 25,000-L raceway ponds in the Qatari desert. The cell size of Picochlorum sp. was small (2–3 µm), and its biomass was harvested using a centrifuge. Cells of Chlorocystis sp. (6–9 µm) formed flocs that settled spontaneously in a sedimentation chamber. Harvested biomass of these two strains was then converted to biocrude oil, using a 500-mL Parr reactor. The biocrude yield of Picochlorum sp. and Chlorocystis sp. was 39.6 ± 1.15% and 34.8 ± 1.65%, respectively. The energy content of the biocrude oil was 32.78 and 33.38 MJ/kg for Chlorocystis sp. and Picochlorum sp., respectively. Both the strains were capable of efficiently utilizing more than 95% nitrogen of the HTL aqueous phase. Although lower biocrude yield was obtained from Chlorocystis sp., compared to Picochlorum sp., harvesting of Chlorocystis sp. would require much lower energy compared to Picochlorum sp. Therefore, a self-settling microalgae (e.g., Chlorocystis sp.) could potentially be a better candidate, over non-settling microalgae, for producing biofuel feedstock.

ACS Style

P. Das; M. I. Thaher; S. Khan; M. Abdulquadir; A. K. Chaudhary; G. Alghasal; H. Al-Jabri. Comparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment. International Journal of Environmental Science and Technology 2019, 16, 7443 -7454.

AMA Style

P. Das, M. I. Thaher, S. Khan, M. Abdulquadir, A. K. Chaudhary, G. Alghasal, H. Al-Jabri. Comparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment. International Journal of Environmental Science and Technology. 2019; 16 (11):7443-7454.

Chicago/Turabian Style

P. Das; M. I. Thaher; S. Khan; M. Abdulquadir; A. K. Chaudhary; G. Alghasal; H. Al-Jabri. 2019. "Comparison of biocrude oil production from self-settling and non-settling microalgae biomass produced in the Qatari desert environment." International Journal of Environmental Science and Technology 16, no. 11: 7443-7454.

Journal article
Published: 23 March 2019 in Bioresource Technology
Reads 0
Downloads 0

A halo-tolerant Tetraselmis sp. was grown in a 100,000 L raceway pond in the Qatari desert environment. As the biomass density reached 0.679 g/L, after 7 days, five different harvesting methods (i.e., cross-flow filtration, electrocoagulation, and coagulation-flocculation by FeCl3, NaOH, and alum) were applied to harvest the biomass. Hydrothermal liquefaction, for all the harvested biomass, was conducted at 350 °C for 30 mins in 10 mL Swagelok unions. The biocrude yield from cross-flow processed biomass (i.e., control) was 50.8%. Biocrude yield from electrocoagulation and alum processed biomass were 62.7% and 60.4% respectively where aluminum could have a catalytic effect. Biocrude yield from FeCl3 and NaOH processed biomass were 42.9% and 19.8% respectively. The total fraction of alkenes and alkanes was higher in the biocrude obtained from alum-harvested biomass, compared to other biocrude samples. However, the transition of metal species from biomass to biocrude was very low in all the biocrudes.

ACS Style

Probir Das; Shoyeb Khan; Mahmoud Thaher; Mohammed AbdulQuadir; S. Kent Hoekman; Hareb Al-Jabri. Effect of harvesting methods on the energy requirement of Tetraselmis sp. biomass production and biocrude yield and quality. Bioresource Technology 2019, 284, 9 -15.

AMA Style

Probir Das, Shoyeb Khan, Mahmoud Thaher, Mohammed AbdulQuadir, S. Kent Hoekman, Hareb Al-Jabri. Effect of harvesting methods on the energy requirement of Tetraselmis sp. biomass production and biocrude yield and quality. Bioresource Technology. 2019; 284 ():9-15.

Chicago/Turabian Style

Probir Das; Shoyeb Khan; Mahmoud Thaher; Mohammed AbdulQuadir; S. Kent Hoekman; Hareb Al-Jabri. 2019. "Effect of harvesting methods on the energy requirement of Tetraselmis sp. biomass production and biocrude yield and quality." Bioresource Technology 284, no. : 9-15.

Articles
Published: 25 January 2019 in Biofuels
Reads 0
Downloads 0

Biomass and metabolite production of three marine (Tetraselmis sp., Nannochloropsis sp., Chlorocystis sp.) and three freshwater microalgae (Scenedesmus sp., Chlorella sp., Monoraphidium sp.) were studied under different iron concentrations. The biomass concentration in control cultures (i.e., no iron added) was in the range of 291.5 – 707.5 mg/L, suggesting that these microalgae could use dissolved iron in the source water and also the carried over iron from the inoculum. In terms of biomass production, 0.05 mg/L or less Fe3+ supplementation was optimum for all the marine microalgae, however addition of iron did not have any significant effect on the biomass yield of freshwater microalgae (P < 0.05). Different iron supplementations, however, resulted in mixed trends in metabolites contents among these strains. Nevertheless, iron uptake by these microalgae was low while extra iron could remain in the culture media or precipitate. The biomass concentrations of Nannochloropsis sp. and Scenedesmus sp. cultures, when grown in outdoor 1000 L raceway tanks without iron supplementation, were 721.5 mg/L and 530 mg/L, respectively. From the indoor and outdoor experiments, it can be concluded that some microalgae have a very low iron requirement.

ACS Style

Probir Das; Mahmoud Ibrahim Thaher; Mohammed Abdul Quadir Mohd Abdul Hakim; Hareb Mohammed S.J. Al-Jabri; Ghamza Saed H.S. Alghasal. Optimization of iron dosage for microalgal biomass production as a feedstock for biofuel. Biofuels 2019, 12, 569 -577.

AMA Style

Probir Das, Mahmoud Ibrahim Thaher, Mohammed Abdul Quadir Mohd Abdul Hakim, Hareb Mohammed S.J. Al-Jabri, Ghamza Saed H.S. Alghasal. Optimization of iron dosage for microalgal biomass production as a feedstock for biofuel. Biofuels. 2019; 12 (5):569-577.

Chicago/Turabian Style

Probir Das; Mahmoud Ibrahim Thaher; Mohammed Abdul Quadir Mohd Abdul Hakim; Hareb Mohammed S.J. Al-Jabri; Ghamza Saed H.S. Alghasal. 2019. "Optimization of iron dosage for microalgal biomass production as a feedstock for biofuel." Biofuels 12, no. 5: 569-577.

Journal article
Published: 21 January 2019 in Bioresource Technology
Reads 0
Downloads 0

With objective to design cyanobacterial biorefinery, taking Lyngbya as a model organism, a detail sequential protocol has been developed for production of UV protectant and lipids. This study addresses ultra violet radiations (UVR), exposure time of UVRT, nitrogen stress, salinity, oxidative stress to produce UV protectant and lipid in cyanobacteria. To evaluate these parameters a design of experiment (DOE; using a 2k design) was performed. Based on chemical solubility property of UV protectant in form of mycosporin like amino acid (MAAs) and lipids were extracted. Quantitative and qualitative assay of UV protectant was confirmed by spectrophotometric scanning and Fourier-transform infrared spectroscopy and lipid through fatty acid methyl esters analysis. Nitrogen abundance and high oxidative stress is helpful in the synthesis of UV protectant. This study concluded, UV exposure is good strategy to induce synthesis of UV protectant and saturated lipid productivity. This biorefinery approach encourages economical and environmentally sustainable options.

ACS Style

Rashmi Chandra; Probir Das; Garima Vishal; Sunil Nagra. Factors affecting the induction of UV protectant and lipid productivity in Lyngbya for sequential biorefinery product recovery. Bioresource Technology 2019, 278, 303 -310.

AMA Style

Rashmi Chandra, Probir Das, Garima Vishal, Sunil Nagra. Factors affecting the induction of UV protectant and lipid productivity in Lyngbya for sequential biorefinery product recovery. Bioresource Technology. 2019; 278 ():303-310.

Chicago/Turabian Style

Rashmi Chandra; Probir Das; Garima Vishal; Sunil Nagra. 2019. "Factors affecting the induction of UV protectant and lipid productivity in Lyngbya for sequential biorefinery product recovery." Bioresource Technology 278, no. : 303-310.

Journal article
Published: 30 December 2018 in Bioresource Technology
Reads 0
Downloads 0

In this study, a halotolerant Tetraselmis sp. was selected for 11-month outdoor semi-continuous cultivation in one sq. m raceway tank in the Qatari desert. A fraction of the culture was harvested using ferric chloride, and the growth media was returned to the tank. The recycling of culture media continued till the culture salinity reached 8% NaCl; 90% culture was then harvested, and the remaining culture fraction was used as inoculum for a new cultivation cycle. The growth of Tetraselmis sp. was not affected by incremental salinity although the intracellular metabolites varied; the average biomass productivity was 17.8 g/m2/d. Harvesting efficiency was slightly affected by the increase in salinity. Iron content in the harvested biomass was in the range of 1.5-3.3%, and acidic solution (pH=1.48) was able to recover 91.3% iron from the harvested biomass. Nonetheless, Tetraselmis sp. could be grown continuously throughout the year in Qatar’s climate condition.

ACS Style

Probir Das; Mahmoud Thaher; Mohammed AbdulQuadir; Shoyeb Khan; Afeefa Chaudhary; Hareb Al-Jabri. Long-term semi-continuous cultivation of a halo-tolerant Tetraselmis sp. using recycled growth media. Bioresource Technology 2018, 276, 35 -41.

AMA Style

Probir Das, Mahmoud Thaher, Mohammed AbdulQuadir, Shoyeb Khan, Afeefa Chaudhary, Hareb Al-Jabri. Long-term semi-continuous cultivation of a halo-tolerant Tetraselmis sp. using recycled growth media. Bioresource Technology. 2018; 276 ():35-41.

Chicago/Turabian Style

Probir Das; Mahmoud Thaher; Mohammed AbdulQuadir; Shoyeb Khan; Afeefa Chaudhary; Hareb Al-Jabri. 2018. "Long-term semi-continuous cultivation of a halo-tolerant Tetraselmis sp. using recycled growth media." Bioresource Technology 276, no. : 35-41.

Article
Published: 03 July 2018 in Environmental Biology of Fishes
Reads 0
Downloads 0

Due to the presence of toxic organic compounds and heavy metals, it is essential to treat the produced water before reuse or discharge to the environment. In this study, produced water sample was collected from a local petroleum company. The sample had the following characteristics: pH: 4.17, total organic carbon (TOC): 720 ppm, total nitrogen (TN): 52.5 ppm, total phosphorus (TP): 0.21 ppm and salinity of 4.3 ppt. As a pretreatment, NaOH was added to raise the pH to 7.1 which removed 40% TOC, 38.3% TN, and 19% of TP. The growth viability of six microalgae strains (three freshwater and three marine) in the pretreated produced water (PPW) were studied in two conditions: (1) without additional nutrients and (2) with N and P supplementation. Out of these strains, only Chlorella sp. and Scenedesmus sp. were able to grow in both experiments. Chlorella sp. had the maximum biomass density on both occasions; it produced 1.2-g L−1 biomass density in the nutrient-supplemented PPW. Next, Chlorella sp. was grown in 1 L PBR to study the contaminant removal efficiencies. After 15 days of growth Chlorella sp. could remove 92% of the TN and 73% of the TOC from the PPW. Fish bio-assay was conducted using raw, pretreated, and biotreated produced water. Results indicate that the bioremediation process greatly reduced the toxicity of the produced water. Furthermore, the bioremediation process simultaneously generated 1.72 g L−1 biomass. Therefore, microalgal bioremediation of produced water provides an opportunity to produce a large quantity of biomass that can be used as feedstock for many products.

ACS Style

Probir Das; Mohammed Abdulquadir; Mahmoud Thaher; Shoyeb Khan; Afeefa Kiran Chaudhary; Ghamza Alghasal; Hareb Mohammed S. J. Al-Jabri. Microalgal bioremediation of petroleum-derived low salinity and low pH produced water. Environmental Biology of Fishes 2018, 31, 435 -444.

AMA Style

Probir Das, Mohammed Abdulquadir, Mahmoud Thaher, Shoyeb Khan, Afeefa Kiran Chaudhary, Ghamza Alghasal, Hareb Mohammed S. J. Al-Jabri. Microalgal bioremediation of petroleum-derived low salinity and low pH produced water. Environmental Biology of Fishes. 2018; 31 (1):435-444.

Chicago/Turabian Style

Probir Das; Mohammed Abdulquadir; Mahmoud Thaher; Shoyeb Khan; Afeefa Kiran Chaudhary; Ghamza Alghasal; Hareb Mohammed S. J. Al-Jabri. 2018. "Microalgal bioremediation of petroleum-derived low salinity and low pH produced water." Environmental Biology of Fishes 31, no. 1: 435-444.

Original paper
Published: 18 June 2018 in International Journal of Environmental Science and Technology
Reads 0
Downloads 0

Availability of N, P and other trace metals in municipal wastewater (MWW) makes it very attractive to produce microalgae biomass using MWW. Although limited organic carbon is available in MWW, supplementing flue gas as CO2 sources may enhance both the biomass production and recycling of nutrients. Five microalgae strains were grown in the primary effluent of MWW, in a small-scale indoor experiment, to compare their nitrogen and phosphorus recovery abilities. From this study, two potential strains (Chlorella sp., and Scenedesmus sp.) were selected for the large-scale (i.e., 200 L) outdoor experiment. Each of these strains was grown in four different conditions: (1) MWW without any CO2 source, (2) MWW with pure CO2, (3) MWW with simulated flue gas (SFG), and (4) modified BG-11 medium with pure CO2. For both strains, injection of either CO2 or SFG in the MWW cultures resulted in faster growth rates, and higher biomass productivities compared to cultures that did not receive CO2 or SFG. Furthermore, recovery of TN from the MWW was ≥ 95% for the microalgae cultures that received either CO2 or SFG; however, in all cases, phosphorus recovery was less than 15% of the initial concentration. Both the MWW grown microalgae biomass (MWGMB) were used as bio-fertilizer to grow the wheat plant. Both the Number of leaves and the average size of the leaves of the plants were higher for both the MWGMB compared to conventional NPK fertilizer.

ACS Style

P. Das; M. A. Quadir; M. I. Thaher; G. S. H. S. Alghasal; H. M. S. J. Aljabri. Microalgal nutrients recycling from the primary effluent of municipal wastewater and use of the produced biomass as bio-fertilizer. International Journal of Environmental Science and Technology 2018, 16, 3355 -3364.

AMA Style

P. Das, M. A. Quadir, M. I. Thaher, G. S. H. S. Alghasal, H. M. S. J. Aljabri. Microalgal nutrients recycling from the primary effluent of municipal wastewater and use of the produced biomass as bio-fertilizer. International Journal of Environmental Science and Technology. 2018; 16 (7):3355-3364.

Chicago/Turabian Style

P. Das; M. A. Quadir; M. I. Thaher; G. S. H. S. Alghasal; H. M. S. J. Aljabri. 2018. "Microalgal nutrients recycling from the primary effluent of municipal wastewater and use of the produced biomass as bio-fertilizer." International Journal of Environmental Science and Technology 16, no. 7: 3355-3364.

Article
Published: 18 June 2018 in Journal of Applied Phycology
Reads 0
Downloads 0

Date palm (Phoenix dactylifera L.) is the main fruit crop found in the arid and semi-arid regions of the world. It naturally adapts to the adverse environments of extreme heat and water scarcity and prevents further desertification in addition to producing fruits with high nutritional value. It is seen in many parts of the world that traditional cultivation practices such as mixed planting and chemical fertilizers have led to low fruit quality resulting in low market values. Long generation time also hinders production of the dates. Tissue culture is therefore considered the most promising solution for rapid large-scale production of true-to-type clonal plants. The plantlets originating from in vitro callus proliferation are transferred from synthetic media to soil. The conventional method of using chemical fertilizers also leads to low plantlet viability with increased environmental and health risk. The current research targets the use of a local microalga, Tetraselmis sp. QUCCCM8, identified as an organic source of nutrients, a substitute for chemical fertilizers to acclimatize cultured date palmlets to soil. Soil was supplemented with different concentrations of algal biomass and plant growth was monitored for 3 months. Soil without any fertilizer and soil amended with 1 g conventional fertilizer were used as negative and positive control, respectively. Supplementation with 0.5 g of algal biomass led to higher plant growth rates, 100% survival rates, high ability of rooting (3.17 ± 0.14 roots), higher number of leaves (2.5 ± 0.25 leaves), largest stem thickness, longer shoot (33.75 ± 1.56 cm), and higher total chlorophyll (159.61 ± 9.6 mg L−1) as compared to conventional fertilizer. These stated findings are significantly higher than the control. Furthermore, elemental analysis of the soil showed that supplementation with algal biomass increased the soil total nitrogen, potassium, and phosphorus contents essential for plant growth. Finally, the comparison of heavy metals composition between soils amended with conventional fertilizer and algae-based fertilizer highlights the potential use of algae as a safe and efficient biofertilizer post tissue culture mode of plantlet generation. This enhanced the viability of healthy plantlets without affecting the environment, averting usage of chemical fertilizers.

ACS Style

Imen Saadaoui; Rehab Sedky; Rihab Rasheed; Touria Bounnit; Amal AlMahmoud; Ali Elshekh; Tasneem Dalgamouni; Khaled Al Jmal; Probir Das; Hareb Al Jabri. Assessment of the algae-based biofertilizer influence on date palm (Phoenix dactylifera L.) cultivation. Journal of Applied Phycology 2018, 31, 457 -463.

AMA Style

Imen Saadaoui, Rehab Sedky, Rihab Rasheed, Touria Bounnit, Amal AlMahmoud, Ali Elshekh, Tasneem Dalgamouni, Khaled Al Jmal, Probir Das, Hareb Al Jabri. Assessment of the algae-based biofertilizer influence on date palm (Phoenix dactylifera L.) cultivation. Journal of Applied Phycology. 2018; 31 (1):457-463.

Chicago/Turabian Style

Imen Saadaoui; Rehab Sedky; Rihab Rasheed; Touria Bounnit; Amal AlMahmoud; Ali Elshekh; Tasneem Dalgamouni; Khaled Al Jmal; Probir Das; Hareb Al Jabri. 2018. "Assessment of the algae-based biofertilizer influence on date palm (Phoenix dactylifera L.) cultivation." Journal of Applied Phycology 31, no. 1: 457-463.

Review
Published: 27 April 2018 in Sustainability
Reads 0
Downloads 0

One way to encourage agricultural self-sufficiency in arid regions is to increase the productivity of conventional freshwater agriculture. Another way is to develop and implement novel strategies and technologies that do not deplete scarce freshwater. Here we describe several options for countries in the Gulf region to increase their agricultural production by taking advantage of a lesser used resource—marginal water. Marginal water can be treated sewage effluent, produced oilfield water, brackish groundwater or seawater. We describe how this resource can be used to grow salt-tolerant forage crops, microalgae and aquaculture crops. Policies needed to implement and/or scale-up such practices are also outlined.

ACS Style

J. Jed Brown; Probir Das; Mohammad Al-Saidi. Sustainable Agriculture in the Arabian/Persian Gulf Region Utilizing Marginal Water Resources: Making the Best of a Bad Situation. Sustainability 2018, 10, 1364 .

AMA Style

J. Jed Brown, Probir Das, Mohammad Al-Saidi. Sustainable Agriculture in the Arabian/Persian Gulf Region Utilizing Marginal Water Resources: Making the Best of a Bad Situation. Sustainability. 2018; 10 (5):1364.

Chicago/Turabian Style

J. Jed Brown; Probir Das; Mohammad Al-Saidi. 2018. "Sustainable Agriculture in the Arabian/Persian Gulf Region Utilizing Marginal Water Resources: Making the Best of a Bad Situation." Sustainability 10, no. 5: 1364.

Journal article
Published: 01 February 2018 in Industrial Biotechnology
Reads 0
Downloads 0

Spontaneous settling of certain aggregating microalgae or cyanobacteria could potentially alleviate the energy requirement in biomass harvesting. A locally isolated floc–forming marine cyanobacteria, Chroococcidiopsis sp., was initially grown indoor to study its self-settling efficiency; 97% of the biomass settled spontaneously in 1 h. Later, the strain was grown in outdoor raceway tanks (1 square meter) for 70 d. Every alternative day, 50% of the culture was harvested by self-settling, and the supernatant was recycled back to the tank. Average biomass productivities for the strain was 16.08 g/m2/d. The biomass had an average 2.26% water extractable phycobiliproteins that comprised of both phycocyanin (11.4 mg/g) and phycoerythrin (10.6 mg/g). Since Chroococcidiopsis sp. biomass can be harvested very efficiently, it would reduce the energy and cost of biomass production which are deemed necessary for microalgal animal feed and biofuel applications. Furthermore, its ability to produce high-value pigments will also make it economically very attractive from biorefinery approach.

ACS Style

Probir Das; Mohammed Abdul Quadir; Afeefa Kiran Chaudhary; Mahmoud Ibrahim Thaher; Shoyeb Khan; Ghamza Alghazal; Hareb Al-Jabri. Outdoor Continuous Cultivation of Self-Settling Marine CyanobacteriumChroococcidiopsissp. Industrial Biotechnology 2018, 14, 45 -53.

AMA Style

Probir Das, Mohammed Abdul Quadir, Afeefa Kiran Chaudhary, Mahmoud Ibrahim Thaher, Shoyeb Khan, Ghamza Alghazal, Hareb Al-Jabri. Outdoor Continuous Cultivation of Self-Settling Marine CyanobacteriumChroococcidiopsissp. Industrial Biotechnology. 2018; 14 (1):45-53.

Chicago/Turabian Style

Probir Das; Mohammed Abdul Quadir; Afeefa Kiran Chaudhary; Mahmoud Ibrahim Thaher; Shoyeb Khan; Ghamza Alghazal; Hareb Al-Jabri. 2018. "Outdoor Continuous Cultivation of Self-Settling Marine CyanobacteriumChroococcidiopsissp." Industrial Biotechnology 14, no. 1: 45-53.

Journal article
Published: 01 January 2018 in Desalination and Water Treatment
Reads 0
Downloads 0
ACS Style

Mohammed A. Abdul Hakim; Mohammad A. Al-Ghouti; Probir Das; Mohammed Abu-Dieyeh; Talaat A. Ahmed; Hareb Mohammed S.J. Aljabri. Potential application of microalgae in produced water treatment. Desalination and Water Treatment 2018, 135, 47 -58.

AMA Style

Mohammed A. Abdul Hakim, Mohammad A. Al-Ghouti, Probir Das, Mohammed Abu-Dieyeh, Talaat A. Ahmed, Hareb Mohammed S.J. Aljabri. Potential application of microalgae in produced water treatment. Desalination and Water Treatment. 2018; 135 ():47-58.

Chicago/Turabian Style

Mohammed A. Abdul Hakim; Mohammad A. Al-Ghouti; Probir Das; Mohammed Abu-Dieyeh; Talaat A. Ahmed; Hareb Mohammed S.J. Aljabri. 2018. "Potential application of microalgae in produced water treatment." Desalination and Water Treatment 135, no. : 47-58.

Journal article
Published: 01 February 2017 in Energy
Reads 0
Downloads 0
ACS Style

Pavan Kumar Naraharisetti; Probir Das; Paul N. Sharratt. Critical factors in energy generation from microalgae. Energy 2017, 120, 138 -152.

AMA Style

Pavan Kumar Naraharisetti, Probir Das, Paul N. Sharratt. Critical factors in energy generation from microalgae. Energy. 2017; 120 ():138-152.

Chicago/Turabian Style

Pavan Kumar Naraharisetti; Probir Das; Paul N. Sharratt. 2017. "Critical factors in energy generation from microalgae." Energy 120, no. : 138-152.

Conference paper
Published: 30 November 2016 in QScience Proceedings
Reads 0
Downloads 0
ACS Style

Mohammed Abdul Quadir Mohammed Abdu Hakim; Mehmoud Ibrahim Thaher; Hareb Mohammed S.J. Aljabri; Ghamza Saed H S Alghasal; Probir Das. Microalgae biomass production in municipal wastewater and use of the produced biomass as sustainable biofertilizer. QScience Proceedings 2016, 2016, 31 .

AMA Style

Mohammed Abdul Quadir Mohammed Abdu Hakim, Mehmoud Ibrahim Thaher, Hareb Mohammed S.J. Aljabri, Ghamza Saed H S Alghasal, Probir Das. Microalgae biomass production in municipal wastewater and use of the produced biomass as sustainable biofertilizer. QScience Proceedings. 2016; 2016 (4):31.

Chicago/Turabian Style

Mohammed Abdul Quadir Mohammed Abdu Hakim; Mehmoud Ibrahim Thaher; Hareb Mohammed S.J. Aljabri; Ghamza Saed H S Alghasal; Probir Das. 2016. "Microalgae biomass production in municipal wastewater and use of the produced biomass as sustainable biofertilizer." QScience Proceedings 2016, no. 4: 31.