Screening, Isolation, and Some Properties of Microbial Cell Flocculants

Nakamura, Junji; Miyashiro, Shigeyoshi; Hirose, Yoshio

doi:10.1080/00021369.1976.10862059

Cited by 23 publications

(20 citation statements)

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“…Among these reports, Nakamura et a1. 3 ) reported serial studies on an Aspergillus sojae flocculant. Takagi et al 5 ) reported that Paecilomyces flocculant had a unique ability to flocculate almost all suspended solids in aqueous solution.…”

Section: Discussionmentioning

confidence: 99%

Screening for and Characteristics of Microbial Flocculants

Kurane

Takeda

Suzuki

1986

Agricultural and Biological Chemistry

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Section: Discussionmentioning

confidence: 99%

Screening for and Characteristics of Microbial Flocculants

Kurane

Takeda

Suzuki

1986

Agricultural and Biological Chemistry

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“…Nakamura et al (1976) also reported that the bioflocculant from A. sojae AJ-7002 compared favourably with synthetic flocculant like ferric chloride, sodium alginate and polyacrylamide.…”

Section: Wastewater Flocculation Assaymentioning

confidence: 99%

Characteristics of a bioflocculant produced by a consortium of <i>Cobetia</i> and <i>Bacillus</i> species and its application in the treatment of wastewaters

Ugbenyen¹,

Okoh²

2014

WSA

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The characteristics of a bioflocculant produced by a consortium of 2 bacteria belonging to the genera Cobetia and Bacillus was investigated. The extracellular bioflocculant was composed of 66% uronic acid and 31% protein and showed an optimum flocculation (90% flocculating activity) of kaolin suspension at a dosage of 0.8 mg/mℓ, pH of 8, and with Ca 2+ as a coagulant aid. The bioflocculant is thermally stable, with a high residual flocculating activity of 86.7%, 89.3% and 87% after heating at 50 o C, 80 o C and 100 o C, respectively, for 25 min. FTIR analysis of the bioflocculant indicated the presence of hydroxyl, amino, carbonyl and carboxyl functional groups. Scanning electron microscopy (SEM) revealed a crystal-linear sponge-like bioflocculant structure and EDX analysis of purified bioflocculant indicated an elemental composition in mass proportions of C:N:O:S:P of 6.67:6.23:37.55:0.38:4.42 (% w/w). The produced bioflocculant was highly efficient in removing turbidity and reducing chemical oxygen demand (COD) in brewery wastewater, dairy wastewater and river water. The bioflocculant could flocculate kaolin clay more efficiently than traditional flocculants; alum and polyethylenimine.

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“…sojae,3) which consisted of 20.9% galactosamine, 0.3% glucosamine, 35.3% 2-ketogluconic acid and 27.5% protein. 14 ) They reported that galactosamine and glucosamine residues of the polymer were not acetylated. 14 ) The· flocculation of yeast cells with the flocculant from Asp.…”

Section: Discussionmentioning

confidence: 99%

“…14 ) They reported that galactosamine and glucosamine residues of the polymer were not acetylated. 14 ) The· flocculation of yeast cells with the flocculant from Asp. sojae was explained in terms of a bridging phenomenon between discrete cells and linearly extended polymer chains forming a three dimensional matrix that is capable of settling under static conditions.…”

Section: Discussionmentioning

confidence: 99%