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Polyhydroxyalkanoate synthesis using different carbon sources by two enhanced biological phosphorus removal microbial communities

Paper ID Volume ID Publish Year Pages File Format Full-Text
35656 45100 2009 9 PDF Available
Title
Polyhydroxyalkanoate synthesis using different carbon sources by two enhanced biological phosphorus removal microbial communities
Abstract

Polyhydroxyalkanoate (PHA) is a biodegradable plastic synthesised by bacteria as energy and carbon storage material. PHA production is mostly based on pure cultures operated under sterile conditions, which increase the costs of this biopolymer. The use of inexpensive mixed culture biomass, such as activated sludge, to produce biodegradable plastics from renewable waste streams has been proposed as an alternative.The effect of carbon sources (acetate, propionate, butyrate and glucose) on the type and quantity of PHA synthesis obtained with different enhanced biological phosphorus removal (EBPR) microbial communities enriched with acetate and propionate are reported in this work. Two sequencing batch reactors (SBRs) were seeded with biomass withdrawn from a non-EBPR wastewater treatment plant (WWTP). The same operational conditions were kept, but using acetate or propionate as the sole carbon source of each reactor. These conditions produced two microbial communities with different P-removal capacity. The results presented in this study show the effect of the carbon source on the PHA composition (amount of polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV) and polyhydroxy-2-methylvalerate (PH2MV)), which differed not just between substrates but also between the two EBPR communities used. In addition, some monomers not always analysed contribute significantly to the total amount of PHA, especially when using butyrate, showing that if they are not considered this can lead to erroneous calculated yields.

Keywords
Volatile fatty acid (VFA); Enhanced biological phosphorus removal (EBPR); Polyhydroxyalkanoate (PHA); Polyphosphate accumulating organisms (PAO)
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Polyhydroxyalkanoate synthesis using different carbon sources by two enhanced biological phosphorus removal microbial communities
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 44, Issue 1, January 2009, Pages 97–105
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us