Utilization of nitrogen-rich agricultural waste streams by microalgae for the production of protein and value-added compounds

Khan, Shoyeb; Das, Probir; Thaher, Mahmoud; AbdulQuadir, Mohammed; Mahata, Chandan; Jabri, Hareb Al

doi:10.1016/j.cogsc.2023.100797

Cited by 19 publications

(10 citation statements)

References 91 publications

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“…A binary culture of microalgae and bacteria could be a better solution for handling the amino acids in the soybean fermented wastewater. It is estimated that it produces a higher amount of biomass rich in protein, which could be used as a fish feed (Khan et al, 2023).…”

Section: Soybean Processing Watermentioning

confidence: 99%

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Raghuraman Rengarajan,

Detchanamurthy,

Panneerselvan

et al. 2024

Physiologia Plantarum

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Post technological advancements and industrialisation, the recovery of resources by treating wastewater is gaining momentum. As the global population continues to grow, the need for water is becoming increasingly urgent. Therefore, the re‐utilisation of water is becoming an increasingly important factor in the preservation of life on this planet. Wastewater is classified according to its source of origin. When left untreated, the effluent causes several environmental hazards and poses health issues as they have higher concentrations of nutrients and toxic heavy metals. Currently, several conventional methods exist to treat and handle wastewater, but they generate secondary waste post‐treatment and are not sustainable. Microalgae‐based treatment of wastewater is highly sustainable, cost‐efficient and aligns with the concept of circular bioeconomy. The biological treatment of effluents using microalgae has several advantages. Approximately 1.83 kg of CO2 is sequestered per kg of the dry biomass during microalgae cultivation. Among all the sustainable alternatives, microalgae offer better biomass productivity by utilising a higher concentration of nutrients in wastewater. The wastewater‐grown microalgae have higher efficiency in producing commercially important secondary metabolites. This systematic review highlights the competence of microalgae in different wastewater sources and their industrial perspectives. This also gives an overview of the biproducts produced from microalgae‐based wastewater treatment.

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Section: Soybean Processing Watermentioning

confidence: 99%

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Raghuraman Rengarajan,

Detchanamurthy,

Panneerselvan

et al. 2024

Physiologia Plantarum

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“…However, no correlation between TN and NH 4 concentrations and biomass concentration was observed. Nonetheless, the link between nitrogenated nutrient concentration and the removal rates of some pharmaceutical groups may open new avenues for research with the supplementation of wastewater with other nitrogen-rich wastes as agricultural wastes [24]. mate or wastewater composition changes than monoalgal cultures [15].…”

Section: Correlation Between Different Factorsmentioning

confidence: 99%

“…However, no correlation between TN and NH4 concentrations and biomass concentration was observed. Nonetheless, the link between nitrogenated nutrient concentration and the removal rates of some pharmaceutical groups may open new avenues for research with the supplementation of wastewater with other nitrogen-rich wastes as agricultural wastes [24]. Most studies involving the removal of pharmaceuticals from wastewater using microalgae are performed under carefully controlled conditions in the laboratory and not many outdoor pilot studies exist in the literature.…”

Section: Correlation Between Different Factorsmentioning

confidence: 99%

Pharmaceuticals Removal from Wastewater with Microalgae: A Pilot Study

et al. 2023

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Urban wastewaters contain pharmaceuticals that are not appropriately removed in conventional wastewater treatments, limiting treated water reuse. Microalgae have been shown to remove pharmaceuticals from urban wastewater in laboratory trials, but few studies have been conducted under natural conditions. In this work, pharmaceutical removal was assessed in a pilot-scale microalgal tertiary wastewater treatment in real conditions. Even after secondary treatment, the water contained measurable amounts of pharmaceuticals (an average of 218.4 ng/L) that significantly decreased to 39.83 ng/L at the exit of the microalgal system. Pharmaceuticals’ average removal rates were slightly higher in the summer (79.1%) than in autumn (71.1%). Antibiotics and antipsychotics were better removed (88.8 and 86.4%, respectively) than antihypertensives (75.3%) and others (Bezafibrate and Diclofenac; 64.0%). Physicochemical characteristics of the wastewater influenced pharmaceutical removal; significant positive correlations were observed between anti-hypertensive drug removal and ammonium concentration (r = 0.53; p < 0.05), total nitrogen and total pharmaceutical removal (r = 0.46; p < 0.05), and total nitrogen and antipsychotic drug removal (r = 0.47; p < 0.05). The results demonstrate the effectiveness of microalgal tertiary treatment in the removal of pharmaceuticals.

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“…Microalgae are photosynthetic microorganisms that can grow in seawater, brackish water, produced water, and wastewater. Microalgae can be grown on nonarable lands using waste nitrogen fertilizers and have higher areal biomass productivity than other terrestrial land plants. , The bulk of the biomass in microalgae comprises proteins, lipids, and carbohydrates . Phycobiliproteins, extracellular polysaccharides (EPS), and a range of high-value pigments (β-carotene, astaxanthin, fucoxanthin, etc.)…”

Section: Introductionmentioning

confidence: 99%

Biolubricant Synthesis by Additization and Chemical Modification from Lipid-Rich Brackish Coelastrella sp. Using a Biorefinery Approach

Khan,

Das,

Radwan

et al. 2024

ACS Sustainable Chem. Eng.

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With a sizable market share and widespread use in automotive and industrial applications, biolubricants are produced from the oils of terrestrial plants that have undergone chemical modification or additive addition. Brackish or marine microalgae utilize less arable land and have a lower freshwater footprint compared to terrestrial plants. They are thus a potential source of raw materials for the production of biolubricants. This study screened eight marine microalgae, i.e., Coelastrella sp., Chlorocystis sp., Ceatocerous sp., Neochloris sp., Picochlorum sp., Tisochrysis sp., Tetraselmis sp., and Synechococcus sp. for their lipid and pigment content as a preliminary step. Coelastrella sp., Tetraselmis sp., and Chlorocystis sp. were chosen for additional study in outdoor cultivation based on total lipid, pigments, and harvestability. Coelastrella, Tetraselmis, and Chlorocystis species had total lipid contents of 50.2, 7.6, and 9.1% (w/w), respectively. In Coelastrella sp., total carotenoids, monounsaturated fatty acid (MUFA), polyunsaturated fatty acid (PUFA), and saturated fatty acid (SFA) concentrations were 0.3, 45.8, and 51%, respectively. Based on total carotenoids, polyunsaturated fatty acid, and lipid content, Coelastrella sp. was chosen to produce biolubricants by chemical modification and addition of its lipid. Kinematic viscosities and the viscosity index of the EVA-added Coelastrella sp. biolubricant were higher than those of the chemically produced Coelastrella TMP triesters. The thermal stability of the Coelastrella biolubricant with EVA additive was higher, whereas chemically synthesized TMP triester biolubricant had considerably lower thermal stability. A 1% increase in EVA reduced the coefficient of friction of SFA biolubricant from 0.075 to 0.03 and the wear rate from 12 μ gm N −1 m −1 to 0.6 μ gm N −1 m −1 , resulting in 60% and 95% reduction in friction and wear rate, respectively, making it a potential lubricant basestock for a variety of industrial applications.

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Utilization of nitrogen-rich agricultural waste streams by microalgae for the production of protein and value-added compounds

Cited by 19 publications

References 91 publications

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Current and future perspectives of a microalgae based circular bioeconomy to manage industrial wastewater– A Systematic Review

Pharmaceuticals Removal from Wastewater with Microalgae: A Pilot Study

Biolubricant Synthesis by Additization and Chemical Modification from Lipid-Rich Brackish Coelastrella sp. Using a Biorefinery Approach

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