PROCESS FOR ENHANCING POLYHYDROXYALKANOATE ACCUMULATION IN ACTIVATED SLUDGE BIOMASS

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United States of America Patent

SERIAL NO

15502052

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A process for producing PHA comprises obtaining biomass produced in the course of biologically treating a first wastewater source containing RBCOD. The biomass is to be exploited with a second wastewater source having a different RBCOD content from the first wastewater source in order to accumulate and thereby produce PHA. Before subjecting the biomass to a PHA accumulation process, the biomass PHA accumulation potential is enhanced via an acclimation process with the second wastewater source. During acclimation, the biomass is subjected to repeated feast-famine periods. During each feast period, the biomass is exposed to a fraction of the second wastewater source. The RBCOD uptake and/or biomass respiration rate is directly or indirectly measured during each feast period. The famine period is maintained for a period of time that is at least two times greater than the length of time of the proceeding feast period. After at least two feast-famine acclimation periods or after one or more measured parameters reveal an increased RBCOD relative uptake or respiration rate of the biomass during a subsequent feast period, the biomass is subjected to a PHA accumulation process using the second wastewater source.

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Patent Owner(s)

Patent OwnerAddress
VEOLIA WATER SOLUTIONS & TECHNOLOGIES SUPPORT94417 SAINT-MAURICE CEDEX

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bengtsson, Simon Olof Harald Dalby, SE 7 8
Hjort, John Markus Kungsbacka, SE 1 0
Majone, Mauro Roma, IT 2 0
Morgan-Sagastume, Fernando Malmö, FR 5 1
Valentino, Francesco Roma, IT 2 0
Werker, Alan Gideon Lomma, SE 11 8

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