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, Srinivasan (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 1H and 13C 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
Publication:	Bioresource Technology
Publisher:	Elsevier Sceince
Additional Information:	Copyright for this article belongs to Elsevier Sceince.
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:	13 Jan 2010 12:13
Last Modified:	19 Sep 2010 05:51
URI:	http://eprints.iisc.ac.in/id/eprint/24731

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