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为了提高废水处理效能,试验采用水解酸化-改进型厌氧-缺氧-好氧(MUCT)组合工艺处理畜禽废水,即在MUCT工艺前增加了水解酸化处理,将二沉池的污泥部分回流至水解酸化池。结果表明:当进水固体悬浮物(SS)为1 000~2 500 mg/L、化学需氧量(CODcr)为2 500~5 000 mg/L、氨氮(NH_4~+-N)为230~370 mg/L、总氮(TN)为150~400 mg/L、总磷(TP)为25~60 mg/L时,SS、CODcr、NH_4~+-N、TN、TP处理率分别达93.12%、94.82%、95.43%、92.79%、87.58%,出水水质达到国家畜禽养殖业污染物排放标准。说明该组合工艺对畜禽养殖废水处理效果优于传统MUCT工艺。
In order to improve the efficiency of wastewater treatment, the experimental treatment of wastewater treatment of livestock and poultry by hydrolytic acidification - modified anaerobic - anaerobic - anaerobic - aerobic (MUCT) process, that is, before the hydrolytic acidification treatment increased MUCT, the second settling tank sludge part Back to the hydrolysis acidification pool. The results showed that when the SS value of influent was 1 000 ~ 2 500 mg / L, the CODcr was 2 500 ~ 5000 mg / L, NH_4 ~ + -N was 230 ~ The treatment rates of SS, CODcr, NH_4 ~ + -N, TN and TP were 93.12%, 370 mg / L, 150 ~ 400 mg / L for total nitrogen and 25 ~ 60 mg / %, 94.82%, 95.43%, 92.79%, 87.58%. The effluent quality meets the national standards for the discharge of pollutants from livestock and poultry industries. This shows that the combined process of livestock and poultry wastewater treatment effect is better than the traditional MUCT process.