Abstract：
:Production of polyhydroxyalkanoates (PHAs) in activated sludge treating wastewater represents an economical and environmental promising alternative to pure culture fermentations. A process for production of PHA from a paper mill wastewater was examined at laboratory scale. The three stage process examined consisted of acidogenic fermentation to convert wastewater organic matter to volatile fatty acids (VFAs), an activated sludge system operating under feast/famine conditions to enrich for PHA producing organisms and accumulation of PHA in batch experiments. After fermentation of the wastewater, 74% of the soluble COD was present as VFA (acetate, propionate, butyrate and valerate) and the resulting PHA after batch accumulation consisted of 31-47 mol% hydroxybutyrate and 53-69 mol% hydroxyvalerate. The maximum PHA content achieved was 48% of the sludge dry weight and the three stage process exhibited a potential to produce 0.11 kg of PHA per kg of influent COD treated.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Bengtsson S,Werker A,Christensson M,Welander Tdoi
10.1016/j.biortech.2007.01.020subject
Has Abstractpub_date
2008-02-01 00:00:00pages
509-16issue
3eissn
0960-8524issn
1873-2976pii
S0960-8524(07)00081-8journal_volume
99pub_type
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