SBR工艺处理预发酵屠宰废水的应用研究

Application Research of the Prefermentation Slaughterhouse Wastewater Treatment with SBR

针对屠宰废水碳氮比高、水质变化大的特点,研究采用序批式活性污泥法（SBR）处理屠宰废水,在pH值为6.0-8.5、温度30-35℃、MLSS为2000-3500 mg/L条件下,考察进水氨氮负荷、溶解氧（DO）、挥发性脂肪酸（VFA）及添加预处理废水对SBR脱氮除磷效果的影响。结果表明：进水采用原屠宰废水的条件下,当DO为2.0 mg/L时,VFA为430 mg/L,COD为3580 mg/L,NH4^＋-N约为270 mg/L,出水COD和NH4^＋-N去除率分别为79%和88%左右;然而,在进水采用预发酵废水的条件下,VFA为1093 mg/L,COD为1370 mg/L,NH4^＋-N约为230 mg/L,出水COD和NH4^＋-N去除率分别高达93%和90%。系统运行30 d左右,投加适量碳源,TN及TP去除率均为90%左右,提高了系统脱氮除磷效果。

Aiming at the characteristics of slaughterhouse wastewater carbon nitrogen ratio,water quality changes,the sequencing batch reactor（ SBR） was used to treat slaughterhouse wastewater.Effect of influent ammonia load,dissolved oxygen（ DO）,volatile fatty acid（ VFA） and add the prefermentation wastewater on N and P removal efficiency were investigated when pH,temperature were 6.0-8.5,30-35℃,and MLSS was 2000-3500 mg/L.The results showed that removal efficiency of COD and NH4^＋-N were 79% and 88% when the influent using slaughterhouse wastewater,DO was 2.0 mg/L,VFA was430 mg/L,COD was 3580 mg/L,influent of NH4^＋-N was 270 mg/L.However,the influent using prefermentation wastewater,removal efficiency of COD and NH4^＋-N were 93% and 90% when VFA was1093 mg/L,COD was 1370 mg/L,influent of NH4^＋-N was 230 mg/L.After 30 d system-run,adding proper amount of carbon source,TN and TP removal rates were about 90%,improve the effect of nitrogen and phosphorus removal system.