Production and characterization of high efficiency bioflocculant isolated from Klebsiella sp. ZZ-3

Yin, Ya Jie; Tian, Zun Ming; Tang, Wei; Li, Lei; Song, Li; McElmurry, Shawn P.

doi:10.1016/j.biortech.2014.08.094

Cited by 76 publications

(27 citation statements)

References 32 publications

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“…ZZ‐3 had a molecular weight range of 603–1820 kDa (Yin et al. ). The average molecular weight of a novel bioflocculant produced by B. licheniformis was approximately 1.76 × 10 6 Da (Xiong et al.…”

Section: Factors Influencing the Flocculating Activity Of Bioflocculantmentioning

confidence: 99%

Implications for public health demands alternatives to inorganic and synthetic flocculants: bioflocculants as important candidates

et al. 2016

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Chemical flocculants are generally used in drinking water and wastewater treatment due to their efficacy and cost effectiveness. However, the question of their toxicity to human health and environmental pollution has been a major concern. In this article, we review the application of some chemical flocculants utilized in water treatment, and bioflocculants as a potential alternative to these chemical flocculants. To the best of our knowledge, there is no report in the literature that provides an up‐to‐date review of the relevant literature on both chemical flocculants and bioflocculants in one paper. As a result, this review paper comprehensively discussed the various chemical flocculants used in water treatment, including their advantages and disadvantages. It also gave insights into bioflocculants production, challenges, various factors influencing their flocculating efficiency and their industrial applications, as well as future research directions including improvement of bioflocculants yields and flocculating activity, and production of cation‐independent bioflocculants. The molecular biology and synthesis of bioflocculants are also discussed.

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Section: Factors Influencing the Flocculating Activity Of Bioflocculantmentioning

confidence: 99%

Implications for public health demands alternatives to inorganic and synthetic flocculants: bioflocculants as important candidates

et al. 2016

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“…For example, Klebsiella sp. ZZ-3, isolated from activated sludge yields an effective, pH-tolerant, and thermostable bioflocculant [31]. In this case, the bioflocculant composition was found to be 84.6% polysaccharides (containing, specifically, rhamnose, mannose, and galactose) and 6.1% protein.…”

Section: Bacteriamentioning

confidence: 94%

“…Likewise, several strains belonging to the Gamma proteobacteria class were isolated from various sources. River water [30], activated sludge [31] and starch wastewater [32] were used to select Klebsiella sp. strains.…”

Section: Bacteriamentioning

confidence: 99%

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Microbial Flocculants as an Alternative to Synthetic Polymers for Wastewater Treatment: A Review

2018

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Microorganisms such as bacteria, fungi, and microalgae have been used to produce bioflocculants with various structures. These polymers are active substances that are biodegradable, environmentally harmless, and have flocculation characteristics. Most of the developed microbial bioflocculants displayed significant flocculating activity (FA > 70–90%) depending on the strain used and on the operating parameters. These biopolymers have been investigated and successfully used for wastewater depollution in the laboratory. In various cases, selected efficient microbial flocculants could reduce significantly suspended solids (SS), turbidity, chemical oxygen demand (COD), total nitrogen (Nt), dye, and heavy metals, with removal percentages exceeding 90% depending on the bioflocculating materials and on the wastewater characteristics. Moreover, bioflocculants showed acceptable results for sludge conditioning (accepted levels of dry solids, specific resistance to filtration, moisture, etc.) compared to chemicals. This paper explores various bioflocculants produced by numerous microbial strains. Their production procedures and flocculating performance will be included. Furthermore, their efficiency in the depollution of wastewater will be discussed.

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“…Sodium nitrate, ammonium chloride and urea allowed the production of glycoprotein by Klebsiella sp. ZZ-3 with a FA superior to 90% (Yin et al 2014). In contrast, pH, temperature, inoculation and growth time course have critical effect on microbial growth, polymer production and flocculating activity.…”

Section: Introductionmentioning

confidence: 99%

Agro-industrial waste materials and wastewater as growth media for microbial bioflocculants production: a review

Siddeeg

Tahoon

Rebah

2019

Mater. Res. Express

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Various microbial strains (bacteria, fungi, and microalgae) produced polymers variable in composition (protein, cellulose, polysaccharide, etc) with interesting flocculation properties such as the ability to remove large spectrum of pollutants (organic and inorganic materials, etc) from wastewater and the stability over a wide range of temperature, pHs and salt concentrations. These bioflocculants have been characterized and successfully tested in wastewater treatment and sludge dewatering. The production of microbial bioflocculants involves the culture step of the bioflocculant-producing microorganism in an appropriate medium, followed by polymer extraction. The production processing is mostly controlled by the microbial growth medium cost. Agro-industrial wastes including agricultural by-products (rice hull, rice stover potato by-products, peanut hull, corn cob, wheat bran, etc), sugar processing wastes and fermentation liquors contain nutrients such as nitrogen and carbon, which can sustain the microbial growth and bioflocculant production. Recently, the potential use of wastewater and sludge as growth media for various bioflocculant-producing microorganisms has been demonstrated. Interestingly, waste pre-treatments may be essential to enhance the microbial growth and the bioflocculant production. Bioflocculant properties (polymer yield, polymer composition, flocculating activity, etc) are controlled by the growth conditions. Moreover, the produced materials showed acceptable results for wastewater treatment and sludge dewatering. This new strategy reported in this review can decrease to some extent the environmental problems related to the disposal of agro-industrial wastes and wastewater sludges. At the same time, this could reduce the cost of microbial bioflocculant production.

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Production and characterization of high efficiency bioflocculant isolated from Klebsiella sp. ZZ-3

Cited by 76 publications

References 32 publications

Implications for public health demands alternatives to inorganic and synthetic flocculants: bioflocculants as important candidates

Implications for public health demands alternatives to inorganic and synthetic flocculants: bioflocculants as important candidates

Microbial Flocculants as an Alternative to Synthetic Polymers for Wastewater Treatment: A Review

Agro-industrial waste materials and wastewater as growth media for microbial bioflocculants production: a review

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