Application of Feedback Control Based on Dissolved Oxygen to a Fixed-Film Sequencing Batch Reactor for Treatment of Brewery Wastewater
Authors: Nguyen, Anh-Long; Duff, Sheldon J.B.; Sheppard, John D.
Source: Water Environment Research, Volume 72, Number 1, January/February 2000 , pp. 75-83(9)
Publisher: Water Environment Federation
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Abstract:
Treatment of brewery wastewater was performed using an aerobic fixed-film sequencing batch reactor using a feedback control system based on dissolved oxygen concentration in the mixed liquor. This control system was modeled after the self-cycling fermentation technique. The system was operated at 25 and 35 °C and under growthrate limiting conditions. Total biochemical oxygen demand (TBOD) removal efficiency was 83% after 3 hours at 25 °C and 92% after 1.5 to 2 hours at 35 °C. The treated effluent produced had a TBOD between 120 and 438 mg/L, with suspended solids contributing between 63 and 71% of the TBOD. Effectiveness of the treatment process might be improved if an efficient secondary clarifier was installed or if the suspended solids were removed from the brewery wastewater before treatment.Keywords: FEEDBACK CONTROL; BREWERY WASTEWATER TREATMENT; FIXED-FILM SEQUENCING BATCH REACTOR
Document Type: Research article
DOI: 10.2175/106143000X137130
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