Title: Process regulation for monomer composition of polyhydroxyalkanoates produced by activated sludge
Abstract: Polyhydroxyalkanoates(PHAs)are environmental-friendly bio-thermoplastics with the potential of wide application.PHAs synthesis by activated sludge is cost-saving and beneficial for waste recycle.The monomer composition and content of PHAs determine the physicochemical characteristics of the polymer.Based on the technology of optimizing PHAs production,the process manipulation and biochemical metabolism for regulating the hydroxyvaleryl content in poly(3-hydroxybutyrate-co-3-hydroxyvalerate)(PHBV)by activated sludge were summarized.Literature review indicated that under aerobic condition the nature of carbon substrate was crucial to the final composition of PHBV.Generally,decrease of dissolved oxygen concentration(DO)led to hydroxyvaleryl content enhancement,and variation of sludge source,pH and carbon to nitrogen and/or phosphorus ratio all tended to alter hydroxyvaleryl content.The effects of the above parameters on hydroxyvaleryl content were inter-related with each other.Further research to regulate the composition of PHAs from activated sludge was forecasted.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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