Production and characterization of a bioflocculant produced by Aspergillus flavus

Aljuboori, Ahmad H. Rajab; Idris, Azni; Abdullah, Norhafizah; Mohamad, Rosfarizan

doi:10.1016/j.biortech.2012.09.016

Cited by 149 publications

(112 citation statements)

References 23 publications

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“…Pu et al (2014) [11] observed that Rhizopus sp., strain M9 and M17, showed good turbidity removal rates of 54% and 92% from the potato starch wastewater, respectively. Similar results were obtained for Aspergillus flavus due to the presence of hydroxyl, amide, carboxyl and methoxyl groups which are suitable functional groups for the coagulation process [12].…”

Section: A Screening For Fungal Coagulantsupporting

confidence: 78%

Fungal Coagulant for Reduction of Water Turbidity

Al‐Mamun¹,

Jebun²,

Alam³

et al. 2016

3rd International Conference on Civil, Biological and Environmental Engineering (CBEE-2016) Feb. 4-5, 2016 Bali (Indonesia)

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Abstract-Turbidity from raw water is, usually, removed from by adding chemical coagulants. These chemicals are hazardous to human body and not much environmentally friendly. Therefore, this study was intended to discover microbial coagulant which would be a new replacement for the chemical coagulants. There are potential microorganisms, those can produce bioactive compounds, which can lead to different charges and surface properties. As such, the main goal of this project was to reduce turbidity of river water using natural coagulant. The discovered microbial coagulant showed promising results which can be considered as safe and environmentally friendly as compared to the conventional chemical coagulants. Thus far, a potential fungal strain is successfully identified which could reduce turbidity of water from 900 NTU to 54 NTU. It is expected that further optimization of the process parameters will help reduce the turbidity of the water. However, the full-scale application of the findings and the economic evaluation of the new coagulant is not determined yet.

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Section: A Screening For Fungal Coagulantsupporting

confidence: 78%

Fungal Coagulant for Reduction of Water Turbidity

Al‐Mamun¹,

Jebun²,

Alam³

et al. 2016

3rd International Conference on Civil, Biological and Environmental Engineering (CBEE-2016) Feb. 4-5, 2016 Bali (Indonesia)

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“…1 Many chemical flocculants, including aluminum sulfate (AS), ferric chloride and polyacrylamide are widely used, although their use may incur some environmental and health problems. 2 Bioflocculants, extracellular biopolymeric substances secreted by bacteria, fungi, algae and yeast, are biodegradable and nontoxic flocculants. 3 The study of bioflocculants has attracted considerable scientific and biotechnological attention over the years because of their biodegradability, harmlessness and lack of secondary pollution.…”

Section: Introductionmentioning

confidence: 99%

Production of a novel bioflocculant and its flocculation performance in aluminum removal

Zuo

2016

Bioengineered

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A novel bioflocculant CBF with high flocculating activity, produced by mixed culture of Rhizobium radiobacter F2 and Bacillus sphaericus F6 from soil, was investigated with regard to its production and flocculation performance in Al(III) removal. The most preferred carbon source, nitrogen source and C/N ratio (w/w) for strains F2 and F6 to produce CBF were glucose, urea and 20, respectively. The optimal inoculum size for CBF production was 10 % (v/v). The optimal initial pH, culture temperature and shaking speed were 7-8, 30C and 140 r/min for 24 h, respectively, under which the flocculating activity of the bioflocculant reached 98.52 %. According to literature review, flocculant dosage, coagulant aid dosage, pH, hydraulic condition of coagulation and sedimentation time are considered as influencing parameters for CBF flocculation performance in Al(III) removal by L16 (4 5 ) orthogonal design. The optimal conditions for Al(III) removal obtained through analysis and verification experiments were as follows: CBF, 28 mg/L; coagulant aid, 1.5 mL/L; initial pH, 8.0; and hydraulic conditions of coagulation: stir speed, 160 r/min; stir time, 40 s; and sedimentation time, 30 min. Under the optimal conditions, the removal efficiency of Al(III) was 92.95 %. Overall, these findings indicate that bioflocculant CBF offers an effective alternative method of decreasing Al(III) during drinking water treatment.

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“…Cosa et al [27] reported that tryptone was the nitrogen source of choice for bioflocculant production by Oceanobacillus sp. Pinky, whereas in the findings of Aljuboori et al [42], peptone was the best nitrogen source that supported bioflocculant production by Apergillus flavus (among other nitrogen sources investigated). The production of extracellular polysaccharide by Aureobasidium pullulans was greatly supported in the medium containing NaNO 3 [47].…”

Section: Effect Of Nitrogen Source On Mbf-ufh Productionmentioning

confidence: 77%

“…Chemical analyses of purified MBF-UFH showed that it is a glycoprotein composed of polysaccharide (76%) and protein (14%). The observed thermal stability is an indication of MBF-UFH predominantly composed of a polysaccharide [42,44]. The decrease in flocculating activity noticed at 100 o C might be due to the denaturation of the protein component of MBF-UFH [11].…”

Section: Effect Of Temperature On Mbf-ufh Flocculating Activitymentioning

confidence: 85%

“…SSB81, and Cordyceps ophioglossoides L2 reached optimal in the medium containing glucose as a sole carbon source [14,[39][40][41]. In contrast, Aljuboori et al [42] found that sucrose was more preferable to other carbon sources assessed for bioflocculant production by Aspergillus flavus. The production of bioflocculant was optimal in the medium where ethanol was used as a carbon source by Pseudomonas aeruginosa [43].…”

Section: Effect Of Carbon Source On Mbf-ufh Productionmentioning

confidence: 99%

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