Study on Slaughterhouse Waste Water Treatment by SBR

Slaughterhouse wastewater contains diluted blood, protein, fat, and suspended solids, as a result the organic and nutrient concentration in this wastewater is very high and the residues are partially solubilized, leading to a highly contaminating effect in riverbeds and other water bodies if the same is let off untreated. The performance of a laboratoryscale Sequencing Batch Reactor (SBR) has been investigated in aerobic-anoxic sequential mode for simultaneous removal of organic carbon and nitrogen from slaughterhouse wastewater. The reactor was operated under three different variations of aerobic-anoxic sequence, namely, (4+4), (5+3), and (3+5) hr. of total react period with two different sets of influent soluble COD (SCOD) and ammonia nitrogen (NH4 + -N) level 1000 ± 50?mg/L, and 90 ± 10?mg/L, 1000 ± 50?mg/L and 180 ± 10?mg/L, respectively. It was observed that from 86 to 95% of SCOD removal is accomplished at the end of 8.0?hr of total react period. In case of (4+4) aerobic-anoxic operating cycle, a reasonable degree of nitrification 90.12 and 74.75% corresponding to initial NH4 + -N value of 96.58 and 176.85?mg/L, respectively, were achieved.