Optimization of polyhydroxyalkanoate storage using mixed cultures and brewery wastewater

摘要

BACKGROUND: Brewery wastewater is a potential feedstock for polyhydroxyalkanoates (PHA) production since it contains high concentrations of easily biodegradable organic matter. Activated sludge was submitted to aerobic dynamic feeding conditions in a sequencing batch reactor fed fermented brewery wastewater in order to select a microbial culture with high storage capacity. The effect of several operational parameters, such as substrate concentration (57, 79 and 109 Cmmol L-1), pH (7 and 9 and without pH control (8-9)) and temperature (15 and 30 degrees C and without T control (15-28 degrees C)) was investigated.