Bacterial bioflocculants: A review of recent advances and perspectives

Shahadat, Mohammad; Teng, Tjoon Tow; Rafatullah, Mohd; Shaikh, Z.A.; Sreekrishnan, T.R.; Ali, S. Wazed

doi:10.1016/j.cej.2017.07.105

Cited by 89 publications

(39 citation statements)

References 154 publications

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“…At the end of treatment, the two treatments with the most senior flocculation activities produced the most top elimination of nutrients, as well as COD and BOD 5 . Similarly, higher removal percentages of nitrate, phosphates, and COD were reported to associate with bioflocculation process of microalgae [13,18,19,38]. In general, algal cell density in flocculation forms is always higher than free forms [20,21].…”

Section: Removal Of Bod 5 and Codmentioning

confidence: 93%

“…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]. Besides, MBF can be used as a promising low-cost method for harvesting microalga biomass [14,21].…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Removal Of Bod 5 and Codmentioning

confidence: 93%

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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“…R1 (El-Salam et al, 2017) and that the functional groups induced high binding capacity. Thermal-stable bioflocculants are preferred for industrial applications (Shahadat et al, 2017). Thus, DSC analysis was performed to examine the thermal characteristics of BF-R1.…”

Section: Characterization Of Bioflocculant Bf-r1mentioning

confidence: 99%

Bioflocculant BF-R1 production by Bacillus sp. R1 using wheat bran hydrolysate and its application in wastewater treatment

Abuduaini

Bai

Cai

et al. 2020

Appl Env Biotechnol

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Bioflocculants are commonly used in wastewater treatment. In this study, an efficient bioflocculant-producing strain, Bacillus sp. R1, was isolated and identified; strain R1 could efficiently produce bioflocculant BF-R1 with wheat bran hydrolysate. The characteristics and flocculation mechanisms of BF-R1 were determined and it was then applied for the granular carbon particles treatment in wastewater. Notably, 3.71 g of BF-R1 were produced when 200 mL/L wheat bran hydrolysate was used as the sole carbon and nitrogen source. BF-R1 contained polysaccharides, proteins, and glycoproteins and showed a good flocculating efficiency of 91.00% for granular carbon particles in contaminated wastewater when 3.50 g/L BF-R1 was added, thus achieving successful recycling of fine particle-contaminated wastewater. Taken together, our findings for the first time demonstrate that BF-R1 fermented using WBH can probably be a promising candidate agent for wastewater management processes.

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“…Strains with high flocculating activity were selected for further studies. The flocculating activity was calculated according to Equation (1).…”

Section: Isolation and Screening Of Bioflocculant Producing Bacteriamentioning

confidence: 99%

“…These condition non-specific properties will make the bioflocculant an attractive alternative for bioremediation. According to Shahadat et al [1], 'Only synthetic mixtures were used for the treatment of pollutants and very limited work was carried out for the treatment of real samples'. For instance, heavy metals were easily removed by bioflocculant from pure heavy metal solutions but it failed to remove it from real industrial wastewater [16].…”

Section: Introductionmentioning

confidence: 99%

Multiple Pollutants Removal from Industrial Wastewaters Using a Novel Bioflocculant Produced by Bacillus licheniformis NJ3

Joshi

Rathod

Vyas

et al. 2018

Env Prog and Sustain Energy

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This study deals with the potential of bioflocculant for the treatment of various industrial wastewaters. Bioflocculant (BFBl) produced by Bacillus licheniformis NJ3, showed 97% flocculating activity in primary screening (kaolin assay). The characteristics of the BFBl such as temperature and pH stability, cation‐independency makes the flocculation process more economic as harmful coagulants and stabilizers are not required. BFBl efficiently treated synthetic wastewaters as compared to alum by reducing turbidity (69–87%), chemical oxygen demand (50–80%) and oil (87%). Further BFBl was used to treat pesticide, petroleum, pharmaceutical and starch processing industrial wastewaters having diversified pH. It reduced total suspended solids (61.9–80%), turbidity (54–94%), total dissolved solids (11–54%), oil and grease (75%) and heavy metals (62–100%) from wastewaters in the absence of cations without altering the temperature and pH. Additionally, Sludge settling process in the presence of BFBl was three times faster as compared to alum. Thus, BFBl successfully treats various wastewaters reducing multiple pollution indices. BFBl was a glycoprotein with 92% polysaccharide and 7% protein contents providing biodegradable nature. As a result, BFBl emerged as environment‐friendly and economical alternative for the bioremediation of various industrial wastewaters. © 2018 American Institute of Chemical Engineers Environ Prog, 38: S306–S314, 2019

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Bacterial bioflocculants: A review of recent advances and perspectives

Cited by 89 publications

References 154 publications

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

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

Bioflocculant BF-R1 production by Bacillus sp. R1 using wheat bran hydrolysate and its application in wastewater treatment

Multiple Pollutants Removal from Industrial Wastewaters Using a Novel Bioflocculant Produced by Bacillus licheniformis NJ3

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