Abstract
A laboratory-scale experiment was carried out for fermentation wastewater treatment by intermittent aeration process using oxidation reduction potential (ORP) as a control parameter. A high concentration of activated sludge was retained in the reactor by ultrafiltration (UF) membrane during the experimental period. For simultaneous carbon and nitrogen removals, the lower and upper ORP limits should be −50 mV and +175 mV respectively. The lower total organic carbon (TOC) and total nitrogen (T-N) concentrations in the effluent was observed, which demonstrated that ORP control method was suitable for high strength fermentation wastewater treatment in a single bioreactor by intermittent aeration process.
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