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Rice husk filtrate as a nutrient medium for the growth of Desulfotomaculum nigrificans: characterisation and sulfate reduction studies

Chockalingam, Evvie and Sivapriya, K and Subramanian, S and Chandrasekaran, S (2005) Rice husk filtrate as a nutrient medium for the growth of Desulfotomaculum nigrificans: characterisation and sulfate reduction studies. In: Bioresource Technology, 96 (17). pp. 1880-1888.

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Abstract

The filtrate obtained by interacting a known amount of rice husk with deionised, Milli-Q water was assessed as a carbon source and nutrient medium for the growth of Desulfotomaculum nigrificans, a typical sulfate-reducing bacterium. The filtrate contained essential growth constituents such as magnesium, potassium, phosphorous apart from calcium, sodium, chloride and sulfate ions. Based on the $^{1}H$ and $^{13}C NMR$ characterization studies, the organic composition of the components dissolved from the rice husk, was found to be: (i) 66% lignocellulosic material, (ii) 24% xylose + arabinose and (iii) 10% galactose. The growth studies indicated a 15-fold increase in the bacterial cell number in about 20 days. Nearly 81% and 66% reduction in sulfate concentration could be achieved in about 28 days, from the solutions containing initial sulfate concentrations of 550 mg/l and 1200 mg/l respectively. In both the cases studied, the iron concentration could be reduced by over 85%.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier.
Keywords: Rice husk;Carbon source;SRB;NMR;FTIR;Dsm. nigrificans
Department/Centre: Division of Chemical Sciences > Organic Chemistry
Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 17 Oct 2005
Last Modified: 19 Sep 2010 04:20
URI: http://eprints.iisc.ernet.in/id/eprint/3834

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