水解+AO工艺处理化工园区混合废水的运行总结

Operation Summary of Treatment of Mixed Wastewater in Chemical Industrial Park by Hydrolysis-AO Process

针对化工园区混合废水水质变化大、生物毒性强、可生化性差及难生物降解等特点,采用"水解+AO+混凝沉淀"系统对园区混合废水进行处理。运行结果表明,该系统对混合废水的COD、NH_4^+-N和TP的去除率分别为75.76%、93.98%和86.58%,出水可达标排放;废水中COD的降解通过水解池、AO池和混凝池的联合作用,NH_4^+-N的去除主要通过AO池的硝化作用,TP的稳定达标主要通过混凝池的吸附、混凝沉淀作用。

Hydrolysis ＋ AO ＋ coagulation-settlement process was applied to treat mixed wastewater form chemical industrial park which characterized by great variation of water quality, high toxicity, poor biochemical and poor biodegradability. The results showed that, the removal rates of COD, NH4^＋-N and TP were 75.76 %, 93.98 % and 86.58 % respectively, and the effluent can achieve the wastewater discharge standard. The degradation of COD in wastewater depended on the combination of hydrolysis reactor, AO reactor and coagulation reactor. The removal of NH4^＋-N mainly depended on the nitrification of AO reactor, and TP mainly depended on the adsorption and coagulation sedimentation of coagulation reactor to meet the requirements of discharge standards.