Plant-based biopolymers: emerging bio-flocculants for microalgal biomass recovery

Jethani, Hitesh; Hebbar, Umesh

doi:10.1007/s11157-020-09561-x

Cited by 12 publications

(4 citation statements)

References 156 publications

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“…The produced methane is mixed with carbon dioxide Requires a small area The Production of methane gas Can be inhibited by the existence of ammonia such as palm oil mill effluent, by almost 100% when using Moringa as a coagulant (Jethani and Hebbar 2021). Apart from some microalgal strains, several bacteria (e.g., Serratia marcescens) (Kurniawan et al 2022) and fungi (e.g., Aspergillus niger) (Mohd Nasir et al 2019) are capable of producing bioflocculants to treat AWW.…”

Section: Regulatory Issues On the Disposal Of Brinementioning

confidence: 99%

Aquaculture from inland fish cultivation to wastewater treatment: a review

Kashem,

Das,

Hawari

et al. 2023

Rev Environ Sci Biotechnol

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The aquaculture industry is rapidly developing, generating a high amount of wastewater. Inland aquaculture effluents contain nutrients and other substances that can cause eutrophication and the emergence of resistive organisms if released into the environment. Hence, aquaculture wastewater should be treated appropriately for reuse in different applications or safely released into the environment, promoting a sustainable industry and a circular economy. The current review provides insight into aquaculture wastewater generation, constituents, and treatment through various technologies. This study’s treatment technologies could be classified as physical, chemical, and biological. SWOT analysis was conducted on each technology to provide an in-depth understanding of the advantages and drawbacks. Suggestions were also stated to shed light on the importance of a sustainable aquaculture industry and the means to transition toward a circular economy. Graphical abstract

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Section: Regulatory Issues On the Disposal Of Brinementioning

confidence: 99%

Aquaculture from inland fish cultivation to wastewater treatment: a review

Kashem,

Das,

Hawari

et al. 2023

Rev Environ Sci Biotechnol

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“…The results suggested that the anaerobic environment inside of flocs plays an important role in activating H 2 production. Given that the single-step preparation of H 2 -producing microalgal aggregates by flocculants is both fast and inexpensive, we also envisage that with the aid of controllably self-assembling biomaterials, 45 bio-flocculants, 46 and genetically engineered microalgae, 47,48 our approach could be applied to large-scale green H 2 production to help achieve carbon neutrality. 49 ■ EXPERIMENTAL SECTION Materials.…”

Section: ■ Conclusionmentioning

confidence: 99%

Chemical Flocculation-Based Green Algae Materials for Photobiological Hydrogen Production

Chen

et al. 2022

ACS Appl. Bio Mater.

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Photobiological hydrogen production is among the most promising ways toward the mass production of hydrogen energy. The use of green algal aggregates to produce photobiological hydrogen has attracted much attention because it overcomes the limitations of sulfur deprivation and oxygen scavengers. However, the current preparation of green algal aggregates that are capable of hydrogen production is time-consuming and laborious, leading to a difficulty in large-scale applications. Here, we demonstrated that the chemical flocculation of green algae is able to generate aggregates for photobiological hydrogen production. We find that Chlorella pyrenoidosa can directly form aggregates in the original liquid cultures by a commercial chemical flocculant, cationic etherified starch, thereby achieving sustainable hydrogen production for 11 days under continuous light irradiation, and the average rate of photobiological production reaches 0.37 μmol H 2 (mg chlorophyll•h) −1 . This research provides a feasible approach for preparing a low-cost photobiological hydrogen production system helping to realize carbon neutrality.

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“…One notable advantage of employing nontoxic, biodegradable plant-based biopolymers as flocculants are recycling previous microalgal growth medium. By permitting the utilization of nutrient leftovers during biomass recovery, reusing the old medium can lower the cost of fertilizers and the water footprint (Jethani & Hebbar 2021).…”

Section: Economic and Environmental Assessment Of Natural Coagulant F...mentioning

confidence: 99%

The potential use of natural coagulants for microalgae harvesting: a review

Amr¹,

Abujazar

Alazaiza

et al. 2022

Water Quality Research Journal

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Microalgae cultivation has received much interest in foods and biofuel production and provides a significant potential option for cleaning the soil, water, and environment from several contaminants. Accordingly, microalgae harvesting becomes essential to separate the solid–liquid microalgae suspension for other green technologies and sustainable processes. Although several physical, chemical, and physiochemical methods have been widely used for microalgae harvesting, their cost, non-environmental residues, and harvesting efficiencies are still questionable. This review summarized and evaluated the performance of different natural coagulants used for harvesting cultivated microalgae. The operational factors and their effect on harvesting efficiency were discussed. Moreover, the current challenges in utilizing several natural coagulants in microalgae harvesting were considered.

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Plant-based biopolymers: emerging bio-flocculants for microalgal biomass recovery

Cited by 12 publications

References 156 publications

Aquaculture from inland fish cultivation to wastewater treatment: a review

Aquaculture from inland fish cultivation to wastewater treatment: a review

Chemical Flocculation-Based Green Algae Materials for Photobiological Hydrogen Production

The potential use of natural coagulants for microalgae harvesting: a review

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