两相厌氧工艺处理合成制药废水的启动试验研究

Experimental study on the start-up of two-phase anaerobic process for treating synthetic pharmaceutical wastewater

设计了两相厌氧系统,以生活污水厂好氧污泥为种泥,对合成制药废水进行启动试验研究.控制水温在（35±1）℃,产酸反应器进水pH在5.5～6.5、产甲烷相进水pH在7.0±0.3,通过交替提高进水COD与增大进水流量提高系统容积负荷（VLR）.经过51 d的启动运行,系统的VLR达到4.7 kg/（m3·d）,HRT为36 h,COD去除率达到89.5％.产酸和产甲烷反应器均培养出足量的适于处理该废水的厌氧污泥,表明两相厌氧反应启动成功.

Using aerobic sludge from a domestic sewage plant as seed sludge, the start-up experiment of two-phase anaerobic system designed for treating synthetic pharmaceutical wastewater has been studied. The water temperature is controlled at （35±1）℃, and influent pH＇ s of acidogenic reactor and methanogenic reactor are maintained at 5.5- 6.5, and 7.0±0.3, respectively. The volume load rate （VLR） of the system is improved alternately by raising influent COD and increasing influent flow rate. After 51 days of start-up operation, the VLR, HRT and COD removing rates reach 4.7 kg/（m3· d）, 36 h and 89.5%, respectively. Both acidogenic reactor and methanogenic reactor have cultured a sufficient amount of anaerobic sludge for treating this kind of wastewater,indicating that the two-phase anaerobic reactor has been started up successfully.