Manukonda, Suresh Kumar and Mudliar, S N and Reddy, K M K and Chakrabarti, T (2004) Production of biodegradable plastics from activated sludge generated from a food processing industrial wastewater treatment plant. Bioresource Technology, 95 (3). pp. 327-330. ISSN 0960-8524

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Abstract

Most of the excess sludge from a wastewater treatment plant (60%) is disposed by landfill. As a resource utilization of excess sludge, the production of biodegradable plastics using the sludge has been proposed. Storage polymers in bacterial cells can be extracted and used as biodegradable plastics. However, widespread applications have been limited by high production cost. In the present study, activated sludge bacteria in a conventional wastewater treatment system were induced, by controlling the carbon: nitrogen ratio to accumulate storage polymers. Polymer yield increased to a maximum 33% of biomass (w/w) when the C/N ratio was increased from 24 to 144, where as specific growth yield decreased with increasing C/N ratio. The conditions which are required for the maximum polymer accumulation were optimized and are discussed.

Item Type:	Article
Uncontrolled Keywords:	Activated Sludge; Poly-b-hydroxybutyrate; Storage Polymer; Biodegradable Plastics; PHB
Subjects:	Environmental Biotechnology
Divisions:	UNSPECIFIED
Depositing User:	Dr. Suresh Kumar Manukonda
Date Deposited:	25 Mar 2014 11:58
Last Modified:	25 Mar 2014 12:03
URI:	http://neeri.csircentral.net/id/eprint/466

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