Phycoremediation of municipal wastewater by microalgae to produce biofuel

Singh, Amit Kumar; Sharma, Nikunj; Farooqi, Humaira; Abdin, Malik Zainul; Möck, Thomas; Kumar, Shashi

doi:10.1080/15226514.2017.1284758

Cited by 42 publications

(4 citation statements)

References 45 publications

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“…A higher heating value (HHV) is the amount of heat released by the full combustion of a unit quantity of fuel. According to prior investigations, the HHV values found in this study were acceptable [ 55 – 57 ], and it concurs with earlier results for P. kessleri (39 and 40 MJ/kg) [ 30 ]. The highest long-chain saturated factor (LCSF) and the highest biodiesel quality [ 57 , 58 ] were also recorded in strain M8.…”

Section: Resultssupporting

confidence: 92%

Enhancing biomass and lipid productivity of a green microalga Parachlorella kessleri for biodiesel production using rapid mutation of atmospheric and room temperature plasma

Elshobary

Zabed

et al. 2022

Biotechnol Biofuels

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Background Microalgae, with their high adaptability to various stress conditions and rapid growth, are considered excellent biomass resources for lipid production and biodiesel feedstocks. However, lipid yield and productivity of the natural strains are common bottlenecks in their large-scale use for lipid production, which can be overcome by evolving new strains using conventional and advanced mutagenic techniques. It is challenging to generate microalgae strains capable of high lipid synthesis through natural selection. As a result, random mutagenesis is currently considered a viable option in many scenarios. The objective of this study was to explore atmospheric and room temperature plasma (ARTP) as a random mutagenesis technique to obtain high lipid-accumulating mutants of a green microalga for improved biodiesel production. Results A green microalgal species was isolated from the Chinese Yellow Sea and identified as Parachlorella kessleri (OM758328). The isolated microalga was subsequently mutated by ARTP to obtain high lipid-accumulating mutants. Based on the growth rate and lipid content, 5 mutants (named M1, M2, M4, M5, and M8) were selected from 15 pre-selected mutants. These five mutants varied in their growth rate from 0.33 to 0.68 day−1, with the lipid content varying between 0.25 g/L in M2 to 0.30 g/L in M8 at 10th day of cultivation. Among the mutants, M8 showed the maximum biomass productivity (0.046 g/L/day) and lipid productivity (20.19 mg/L/day), which were 75% and 44% higher than the wild strain, respectively. The triglyceride (TAG) content of M8 was found to be 0.56 g/L at 16th day of cultivation, which was 1.77-fold higher than that of the wild strain. Furthermore, M8 had the highest saturated fatty acids (C16-18) with the lowermost polyunsaturated fatty acid content, which are favorable properties of a biodiesel feedstock according to international standards. Conclusion The mutant strain of P. kessleri developed by the ARTP technique exhibited significant improvements in biomass productivity, lipid content, and biodiesel quality. Therefore, the biomass of this mutant microalga could be a potential feedstock for biodiesel production.

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Section: Resultssupporting

confidence: 92%

Enhancing biomass and lipid productivity of a green microalga Parachlorella kessleri for biodiesel production using rapid mutation of atmospheric and room temperature plasma

Elshobary

Zabed

et al. 2022

Biotechnol Biofuels

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“…Microalgae require nitrogen (N) and phosphorus (P) and are highly efficient at removing both elements from municipal wastewater that can have typical concentrations of 30-40 mg•L −1 N and 5-10 mg•L −1 P [63]. Parachlorella kessleri-I removed 81% of the total N and 98% of the P from the water from Neela Hauz Lake (India) polluted by sewage [64].…”

Section: Microalgal Wastewater Treatment For Biogas Productionmentioning

confidence: 99%

“…Some species of algae can thrive in many wastewaters, but others do not perform well in wastewater depending on the source and type of waste [64]. Scenedesmus and Chlorella have both been shown to grow in a broad range of wastewaters [80].…”

Section: Microalgal Wastewater Treatment For Biogas Productionmentioning

confidence: 99%

A Brief Review of Anaerobic Digestion of Algae for Bioenergy

et al. 2019

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The potential of algal biomass as a source of liquid and gaseous biofuels has been the subject of considerable research over the past few decades, with researchers strongly agreeing that algae have the potential of becoming a viable aquatic energy crop with a higher energy potential compared to that from either terrestrial biomass or municipal solid waste. However, neither microalgae nor seaweed are currently cultivated solely for energy purposes due to the high costs of harvesting, concentrating and drying. Anaerobic digestion of algal biomass could theoretically reduce costs associated with drying wet biomass before processing, but practical yields of biogas from digestion of many algae are substantially below the theoretical maximum. New processing methods are needed to reduce costs and increase the net energy balance. This review examines the biochemical and structural properties of seaweeds and of microalgal biomass that has been produced as part of the treatment of wastewater, and discusses some of the significant hurdles and recent initiatives for producing biogas from their anaerobic digestion.

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“…Chlamydomonas reinhardtii, Chlorella sp., Parachlorella kessleri-I, and Nannochloropsis gaditana were investigated by the study [43] for their effectiveness in phycoremediation of municipal waste and prospective usage in biodiesel generation. P. kessleri-I outperformed the other three studied strains in terms of growth rate and biomass output in 100% municipal waste.…”

Section: Figure 4 Heavy Metals Removal Mechanisms [32]mentioning

confidence: 99%

Phycoremediation: Algae as an Effective Agent for Sustainable Remediation and Waste Water Treatment

Ogundele¹,

Adewumi²,

Oyegoke³

2023

EESRJ

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This article gives a brief review of the use of algae for remediation, including an introduction to its general principles, reported applicability, and utilization. Algae comprises of a broad fusion of photosynthesizing organisms. Based on size and morphology, algae are classified into macro-and microalgae. Algae were the first photosynthetic inhabitant on the earth surface as a result of their ability to utilize sunlight for synthesis of carbon dioxide, nutrients, water and the ability to increase atmospheric oxygen levels. Algae's growth within the environment is determined by the availability of nitrogen, carbon, phosphorous compounds, and other essential trace nutrients within the ecosystem. In line, algae enhance the air with oxygen (O2) synthesized from the photosynthetic mechanism. Phycoremediation have always utilized algae species in the clean-up of various domestic, agricultural, municipal, and industrial wastewaters. Therefore, unlike conventional technologies that have the potential for secondary pollution, high operating costs, insufficient utilization of the natural resources, and a general public health burden brought on by the potential waterborne diseases, phycoremediation technology offers a sustainable, economical, and environmentally friendly method of remediating wastewater pollutants.

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Phycoremediation of municipal wastewater by microalgae to produce biofuel

Cited by 42 publications

References 45 publications

Enhancing biomass and lipid productivity of a green microalga Parachlorella kessleri for biodiesel production using rapid mutation of atmospheric and room temperature plasma

Enhancing biomass and lipid productivity of a green microalga Parachlorella kessleri for biodiesel production using rapid mutation of atmospheric and room temperature plasma

A Brief Review of Anaerobic Digestion of Algae for Bioenergy

Phycoremediation: Algae as an Effective Agent for Sustainable Remediation and Waste Water Treatment

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