Extracellular polysaccharides production by Arthrobacter viscosus

López, Eduardo; Ramos, Israel; Sanromán, M. Ángeles

doi:10.1016/s0260-8774(03)00078-5

Cited by 24 publications

(34 citation statements)

References 12 publications

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“…Shaker speed determines the concentration of dissolved oxygen that influences nutrient absorption and enzymatic reaction (Lopez et al. ). Li et al.…”

Section: Effect Of Temperature and Agitation On The Production Of Biomentioning

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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“…Shaker speed determines the concentration of dissolved oxygen that influences nutrient absorption and enzymatic reaction (Lopez et al. ). Li et al.…”

Section: Effect Of Temperature and Agitation On The Production Of Biomentioning

confidence: 99%

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

et al. 2016

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“…Optimum pH for polysaccharide production in other microorganisms studied were pH 7 in Pseudomonas fluorescen (with slightly thicker biofilms when there is no pH control), Arthrobacter viscosus (grown in flask), P. aeruginosa, Micrococcus sp. and Neisseria meningitidis (Oliveira et al 1994;Lopez et al 2003;Henriques et al 2006;Kiliç and Dönmez 2008), and pH 8 in Arthrobacter viscosus (grown in bioreactor) and Ochrobactrum sp. (Lopez et al 2003;Kiliç and Dönmez 2008).…”

Section: Optimization Of Temperaturementioning

confidence: 99%

“…and Neisseria meningitidis (Oliveira et al 1994;Lopez et al 2003;Henriques et al 2006;Kiliç and Dönmez 2008), and pH 8 in Arthrobacter viscosus (grown in bioreactor) and Ochrobactrum sp. (Lopez et al 2003;Kiliç and Dönmez 2008). The variance analysis by student ''t'' test presented significant differences at a level of 1% for the pH values tested.…”

Section: Optimization Of Temperaturementioning

confidence: 99%

Screening, production, optimization and characterization of cyanobacterial polysaccharide

Singh

Das

2011

World J Microbiol Biotechnol

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Biotechnological applications of algal polysaccharide as emulsifiers, thickeners and laxatives have led to the screening and selection of certain diazotrophic filamentous cyanobacteria from saline/alkaline soil of Madhya Pradesh, India. Strain specific variation in cell bound, extracellular and total polysaccharide content was quantified under laboratory conditions. Among the cyanobacterial isolates examined Nostoc calcicola RDU-3 was found to produce highest amount (105 mg l -1 ) of extracellular polysaccharide on 44th day of growth under diazotrophic growth conditions. Extracellular polysaccharide production of cyanobacterium Nostoc calcicola RDU-3 was optimal at pH-10, temperature 35°C, photoperiod of 24 h and in white light. The Gas Chromatographic analysis of polysaccharide from Nostoc calcicola RDU-3 revealed the presence of ribose (36.03%), xylose (34.13%), rhamnose (29.67%) and glucose (4.0%). The polysaccharide is novel in that it possesses ribose as the predominant monosaccharide with very low levels of glucose. Predominance of ribose monosaccharide is the unique feature which is reported to be used as metabolic supplement to the heart. IR spectrum of extracellular polysaccharide revealed the presence of sulphate group. Such sulphated polysaccharide is reported to have antiviral properties.

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“…viscosus is a non-pathogenic soil bacterium that produces a high amount of viscous extracellular polysaccharides [16,17]. This characteristic favours its adhesion to different support structures and increases its ability to remove heavy metals from liquid streams [18,19].…”

Section: Introductionmentioning

confidence: 99%

Removal of Cr(VI) from Aqueous Solutions by a Bacterial Biofilm Supported on Zeolite: Optimisation of the Operational Conditions and Scale‐Up of the Bioreactor

Pazos¹,

Branco²,

Neves³

et al. 2010

Chem Eng & Technol

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The aim of this study was to investigate the feasibility of a bioreactor system and its scale-up to remove Cr(VI) from solution. The bioreactor is based on an innovative process that combines bioreduction of Cr(VI) to Cr(III) by the bacterium Arthrobacter viscosus and Cr(III) sorption by a specific zeolite. Batch studies were conducted in a laboratory-scale bioreactor, taking into account different operating conditions. Several variables, such as biomass concentration, pH and zeolite pre-treatment, were evaluated to increase removal efficiency. The obtained results suggest that the Cr removal efficiency is improved when the initial biomass concentration is approximately 5 g L -1 and the pH in the system is maintained at an acidic level. Under the optimised conditions, approximately 100 % of the Cr(VI) was removed. The scale-up of the developed biofilm process operating under the optimised conditions was satisfactorily tested in a 150-L bioreactor.

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Extracellular polysaccharides production by Arthrobacter viscosus

Cited by 24 publications

References 12 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

Screening, production, optimization and characterization of cyanobacterial polysaccharide

Removal of Cr(VI) from Aqueous Solutions by a Bacterial Biofilm Supported on Zeolite: Optimisation of the Operational Conditions and Scale‐Up of the Bioreactor

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