Bioflocculation formation of microalgae-bacteria in enhancing microalgae harvesting and nutrient removal from wastewater effluent

Nguyen, Thi Dong Phuong; Le, Thi Van Anh; Show, Pau Loke; Nguyen, Thanh Thuy; Tran, Minh Hien; Tran, Thi Ngoc Thu; Lee, Sze Ying

doi:10.1016/j.biortech.2018.09.146

Cited by 144 publications

(58 citation statements)

References 42 publications

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“…Lei et al [172] have reported that microbial flocculant flocculation-flotation technology can effectively harvest chlorella, and the use of composite flocculants can also enhance the harvest of chlorella [173]. This study provided some insights on the formation of flocs and provided a theoretical basis for further improving the recovery of chlorella and removing nutrients from seafood wastewater [174][175][176].…”

Section: Understanding Of Bioflocculation Mechanismsmentioning

confidence: 71%

Preparation, Performances, and Mechanisms of Microbial Flocculants for Wastewater Treatment

et al. 2020

IJERPH

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In recent years, close attention has been paid to microbial flocculants because of their advantages, including safety to humans, environmental friendliness, and acceptable removal performances. In this review, the preparation methods of microbial flocculants were first reviewed. Then, the performances of bioflocculants in the removal of suspended solids, heavy metals, and other organic pollutants from various types of wastewater were described and commented, and the removal mechanisms, including adsorption bridging, charge neutralization, chemical reactions, and charge neutrality, were also discussed. The future research needs on microbial flocculants were also proposed. This review would lead to a better understanding of current status, challenges, and corresponding strategies on microbial flocculants and bioflocculation in wastewater treatment.

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Section: Understanding Of Bioflocculation Mechanismsmentioning

confidence: 71%

Preparation, Performances, and Mechanisms of Microbial Flocculants for Wastewater Treatment

et al. 2020

IJERPH

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“…Bio-flocculants on the other hand are much safer and eco-friendly when compared to their chemical counter parts. They are also cheaper to be used, and typically there is no pretreatment required before further downstream processing of microalgae and recycling of culture media [62,63]. Most of the bioflocculants used are biopolymers such as acrylic acid and chitosan which exist naturally or produce artificially [64].…”

Section: Flocculationmentioning

confidence: 99%

A review on microalgae cultivation and harvesting, and their biomass extraction processing using ionic liquids

et al. 2020

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The richness of high-value bio-compounds derived from microalgae has made microalgae a promising and sustainable source of useful product. The present work starts with a review on the usage of open pond and photobioreactor in culturing various microalgae strains, followed by an in-depth evaluation on the common harvesting techniques used to collect microalgae from culture medium. The harvesting methods discussed include filtration, centrifugation, flocculation, and flotation. Additionally, the advanced extraction technologies using ionic liquids as extractive solvents applied to extract high-value bio-compounds such as lipids, carbohydrates, proteins, and other bioactive compounds from microalgae biomass are summarized and discussed. However, more work needs to be done to fully utilize the potential of microalgae biomass for the application in large-scale production of biofuels, food additives, and nutritive supplements.

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“…Recent evidence indicated that the formation of microalgae-bacteria flocculation (MBF) and fungi-assisted microalgae pellets (FAMP) enhanced nutrient removal from wastewater effluent [13,14]. While MBF is a flocculation formation of microalgae cells assisted with bacteria, FAMP is a pellet formation of microalgae cells supported with fungi [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…During bioflocculation formation, the aggregation of bacteria or fungi and microalgae cells creates large flocs or pellets which accelerate the adsorption of suspended compounds in surrounding medium to form co-bioflocculate and thus enhance the removal efficiency of nitrogen and phosphorus [14][15][16]. erefore, MBF and FAMP have been used to improve nutrient removal and effluent recovery in aerobic-activated sludge technologies [13,15,17]. e bioflocculation of microalgae and bacteria have been intensively studied and reviewed for recent advances and perspectives [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Removal of Nutrients from Fertilizer Plant Wastewater Using Scenedesmus sp.: Formation of Bioflocculation and Enhancement of Removal Efficiency

Pham

Bui

2020

Journal of Chemistry

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Eutrophication of surface water has become an environmental concern in recent decades. High concentrations of nutrients, especially nitrogen- and phosphorus-rich species, have contributed to the process of eutrophication, highlighting a demand for effective and economical methods of removing nitrogen and phosphorus from wastewater. This study aimed to investigate the ability of a green microalga species, Scenedesmus sp., to remove nitrogen and phosphorus, as well as chemical oxygen demand (COD) and biochemical oxygen demand (BOD5), from fertilizer plant wastewater. Different microalgae concentrations from 10 mg/L to 60 mg/L were used to assess the growth rate, biomass production, and removal ability. The results indicated that Scenedesmus sp. grew well in the wastewater (with a growth rate from 0.3 to 0.38/day) and produced up to 70.2 mg/L of dry biomass. The algal species was able to remove ammonium (NH4+), nitrate (NO3−), phosphate (PO43−), total phosphorus (TP), COD, and BOD5 with removal rates up to 93%, 84%, 97%, 96%, 93%, and 84%, respectively. Autobioflocculation (AFL) was observed in all cultures with flocculation activity of up to 88.3% in the highest algal biomass treatment. The formation of bioflocculation enhanced the removal of nutrients, COD, and BOD5 from wastewater effluent. The results indicated that wastewater from a fertilizer plant could be used as a cost-effective growth medium for algal biomass. The autoflocculation of microalgae could be used as a more practical approach for wastewater treatment using microalgae to eliminate eutrophication.

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Bioflocculation formation of microalgae-bacteria in enhancing microalgae harvesting and nutrient removal from wastewater effluent

Cited by 144 publications

References 42 publications

Preparation, Performances, and Mechanisms of Microbial Flocculants for Wastewater Treatment

Preparation, Performances, and Mechanisms of Microbial Flocculants for Wastewater Treatment

A review on microalgae cultivation and harvesting, and their biomass extraction processing using ionic liquids

Removal of Nutrients from Fertilizer Plant Wastewater Using Scenedesmus sp.: Formation of Bioflocculation and Enhancement of Removal Efficiency

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