Performance Studies on Biological Treatment of Slaughterhouse Wastewater Using Mixed Culture in Sequencing Batch Reactor

TL;DRAbstract

The slaughterhouse and meat processing units generate large volumes of wastewater containing high organic and nitrogenous substances (COD, NH $_4^+$ -N), which require considerable degree of treatment before discharge to the water body. In this regard, selecting an effective treatment system is important. Amongst various biological treatment systems sequencing batch reactor (SBR) is comparatively noble bioreactor system for treating waste containing carbon and nitrogen simultaneously. The performance of a 20 L sequencing batch reactor (SBR) treating wastewater discharged from a local small-scale slaughterhouse was examined in the laboratory at ambient temperature. The reactor was operated under three different variations of aerobic-anoxic sequence, viz. 4+4, 5+3 and 3+5 hours of total react period with influent soluble COD (SCOD) and ammonia nitrogen level 1000 ± 50 mg/L & 90 ±; 10 mg/L and 2000 ± 50 mg/L & 180 ± 10 mg/L, respectively. It has been observed that 80 to 96% of SCO

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