A complete operation cycle was 7h, which consisted of fill, aeration(5h), settling(1h),
stationary(1h) and drawing. Conventional treatment technologies were unsuccessful in treating slaughterhouse
wastewater because it contained substantial amounts of fat, oil and grease (FOG). The SBR process showed great
nutrient removal performances after 7 days prefermentation. The removals of COD, NH4+-N and PO43--P were 99%,
85% and 99%, respectively. The increase in effluent volatile fatty acid (VFA) and phosphate concentrations after
prefermentation may explain the high levels of biological carbon, nitrogen and phosphorus removal observed. The
results also showed that 30℃ was found to be the most suitable temperature as the removal efficiency of COD, NH4+-
N and PO43--P was 96%, 92% and 91%, respectively.
A complete operation cycle was 7h, which consisted of fill, aeration(5h), settling(1h),stationary(1h) and drawing. Conventional treatment technologies were unsuccessful in treating slaughterhousewastewater because it contained substantial amounts of fat, oil and grease (FOG). The SBR process showed greatnutrient removal performances after 7 days prefermentation. The removals of COD, NH4+-N and PO43--P were 99%,85% and 99%, respectively. The increase in effluent volatile fatty acid (VFA) and phosphate concentrations afterprefermentation may explain the high levels of biological carbon, nitrogen and phosphorus removal observed. Theresults also showed that 30℃ was found to be the most suitable temperature as the removal efficiency of COD, NH4+-N and PO43--P was 96%, 92% and 91%, respectively.
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