一体化两相厌氧反应器处理生活污水的快速启动

Rapid Start-up of Integrated Two-phase Anaerobic Reactor for Treating Domestic Sewage

采用自行设计的一体化两相厌氧反应器处理生活污水,对启动过程进行研究。控制水温为35℃左右,在进水水质维持基本不变的情况下,通过逐步缩短水力停留时间(HRT)来提高系统的COD容积负荷(VLR),仅36 d就完成了启动。进水pH值在7.39～7.67范围内,采用动力学控制方法很好地实现了产酸相和产甲烷相的分离。启动完成后反应器运行状况良好,系统的HRT约为7 h,VLR约为1.31 kg/(m3.d),对COD的去除率约为80%,对SS的去除率达到近90%,产气量约为0.31 L/h。

An integrated two-phase anaerobic reactor was designed to treat domestic sewage, and the corresponding start-up process was investigated. Under 35℃ and constant influent quality, the COD volumetric loading rate （VLR） of the system was raised by decreasing HRT, and the start-up process was completed in only 36 days. When the influent pH was 7.39 to 7.67, the acidogenic and methanogenic phase of the reactor were separated using a kinetics method. After completing the start-up process, the reactor operated well. The COD removal rate was more than 80% , the SS removal rate was about 90% , and the gas production rate was about 0.31 L/h. VLR was 1.31 kg/（m3 ·d） and HRT was about 7 h.