Using Ruditapes philippinarum conglutination mud to produce bioflocculant and its applications in wastewater treatment

Gao, Qi; Zhu, Xiaoming; Mu, Jun; Zhang, Yi; Dong, Xiaoli

doi:10.1016/j.biortech.2009.05.035

Cited by 79 publications

(39 citation statements)

References 18 publications

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“…Heavy metals from industrial processes are of special concern because they produce water or chronic poisoning in aquatic animals (Ellis 1989). More researchers are focusing their attention on industrial wastewater treatments (El-Sheekh et al 2005;Gao et al 2009;Liu et al 2009;Lu et al 2005;Wang et al 2007) and on drinking water treatment (Liu et al 2009) using microbial bio-flocculants. The use of bio-flocculants in wastewater treatment seems to be an economical alternative to physical and chemical means (Vijayalakshmi, Raichur 2003).…”

Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metals Using Bacterial Bio-Flocculants of Bacillus Sp. And Pseudomonas Sp.

Azzam

Tawfik

2015

Journal of Environmental Engineering and Landscape Management

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Abstract. Trinitrotoluene (TNT), a commonly used explosive for military and industrial applications, can cause serious environmental pollution. 28-day laboratory pot experiment was carried out applying bioaugmentation using laboratory selected bacterial strains as inoculum, biostimulation with molasses and cabbage leaf extract, and phytoremediation using rye and blue fenugreek to study the effect of these treatments on TNT removal and changes in soil microbial community responsible for contaminant degradation. Chemical analyses revealed significant decreases in TNT concentrations, including reduction of some of the TNT to its amino derivates during the 28-day tests. The combination of bioaugmentation-biostimulation approach coupled with rye cultivation had the most profound effect on TNT degradation. Although plants enhanced the total microbial community abundance, blue fenugreek cultivation did not significantly affect the TNT degradation rate. The results from molecular analyses suggested the survival and elevation of the introduced bacterial strains throughout the experiment. Keywords: TNT, bioaugmentation, biostimulation, phytoremediation, microbial community.

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Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metals Using Bacterial Bio-Flocculants of Bacillus Sp. And Pseudomonas Sp.

Azzam

Tawfik

2015

Journal of Environmental Engineering and Landscape Management

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“…The EPS secretion of Bacillus group was previously reported to have a flocculation effect on metal and kaolin suspension (Fang et al 2014;Li and Yu 2014;Yuan et al 2011), and dye removal by EPS extracted from Klebsiella mobilis and Rothia sp. has also been reported (Gao et al 2009;Wang et al 2007). Thus, future works on the coefficient removal of azo dyes by extracellular adsorption and bio-decolorization of this strain must be interesting.…”

Section: Discussionmentioning

confidence: 79%

Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form

Zhang

Tang

et al. 2015

Appl Microbiol Biotechnol

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Strain CICC 23870 capable of decolorization of various azo dyes under high saline conditions was isolated from saline-alkali soil. The oxygen-insensitive azoreductase in crude extracts exhibited a wide substrate adaptively in the presence of NADH as a cofactor. The decolorization process by free cells followed first-order kinetics, with a high Methyl Orange (MO) tolerance concentration up to 100 mg l(-1) estimated by Haldane model. The average decolorization rate of free cell system was 26.30 mg g(-1) h(-1) at initial MO concentration of 32.7 mg l(-1). However, the values for the systems of immobilized cells (4 mm) in alginate, alginate and nano-TiO2, and alginate and powered activated carbon (PAC) were 6.83, 4.64, and 11.34 mg g(-1) h(-1), respectively. The effective diffusion factors in the tree different matrices were calculated by diffusion-based mathematic model. The diffusion step controls the overall decolorization rate, and the effective diffusion coefficients varied with internal structure of the bead matrices. The diffusion coefficients were increased from 4.98 × 10(-9) to 2.25 × 10(-8) cm(2) s(-1) when PAC was added, but decreased to 6.62 × 10(-10) cm(2) s(-1) when nano-TiO2 was added. The immobilized matrices could be reused for at least three cycles but with a decreased decolorization rate, possibly due to the breakage of beads at the end of each cycle, which led to the loss of immobilized bacteria.

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“…SM9913 was optimal at pH 7 [54]. Gong et al [21] reported that the crude bioflocculant produced by Serratia ficaris flocculated well at pH 5-7, whereas Gao et al [10] and Zhu et al [55] found that the flocculating activity of bioflocculants produced by Rothia sp. and Chlamydomonas reinhardtii were maximal at pH 9 and 10, respectively.…”

Section: Effect Of Ph On the Flocculating Activity Of Mbf-ufhmentioning

confidence: 99%

“…Bioflocculants, on the other hand, have enormous advantages such as biodegradability, lack of secondary pollution from intermediate degradation, and being innocuous to humans, hence their relevance in water -treatment technology has gained much popularity [10]. Bioflocculants are secondary metabolites secreted by microorganisms during growth [11].…”

mentioning

confidence: 99%

Studies on Bioflocculant Production by Bacillus sp. AEMREG7

Okaiyeto¹,

Nwodo²,

Okoli³

et al. 2016

Pol. J. Environ. Stud.

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Using Ruditapes philippinarum conglutination mud to produce bioflocculant and its applications in wastewater treatment

Cited by 79 publications

References 18 publications

Removal of Heavy Metals Using Bacterial Bio-Flocculants of Bacillus Sp. And Pseudomonas Sp.

Removal of Heavy Metals Using Bacterial Bio-Flocculants of Bacillus Sp. And Pseudomonas Sp.

Decolorization characteristics of a newly isolated salt-tolerant Bacillus sp. strain and its application for azo dye-containing wastewater in immobilized form

Studies on Bioflocculant Production by Bacillus sp. AEMREG7

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