优化生物接触氧化工艺处理中药废水实验研究  

Treatment of Traditional Chinese Medicine Wastewater with Optimized Biological Contact Oxidation Process

作　　者：兴虹[1] 吴丽红[1] 安长伟[1] Xing Hong;Wu Lihong;An Changwei(Liaoning Institute of Science and Technology, Benxi 117004, China)

机构地区：[1]辽宁科技学院,辽宁本溪117004

出　　处：《环境科学与管理》2022年第4期88-91,122,共5页Environmental Science and Management

基　　金：2020年度辽宁省教育厅项目(L2020lkyqn-04);2019辽宁省科技厅项目(2019-BS-128)。

摘　　要：为解决本溪某中药厂废水站长期停产再启动和出水超标问题,利用生物接触氧化装置对中药废水进行小试。进水pH调整为7.0~7.5,反应装置内水温23℃,溶解氧保持(2.0~3.5)mg/L范围。用城市污水厂回流污泥作为接种污泥,逐渐增加中药废水与城市污水的比例,24天完成挂膜驯化。当进水COD_(cr)为1920 mg/L左右,水力停留时间24 h时,COD_(cr)去除率达82%,出水COD_(cr)在340 mg/L以下,满足排入下水道要求。生物接触氧化池进水pH5.5~6.0时,活性污泥由黄褐色变为灰色,生物膜脱落,池内污泥絮体细碎,出水COD_(cr)超标。In order relaunch and reach effluent wastewater standardsafter a long-term shutdown for Chinese medicine factory in Benxi,a small-scale test was carried out on the traditional Chinese medicine wastewater by using a biological contact oxidation device.The pH of the influent water was adjusted to 7.0~7.5,the water temperature in the reaction device was 23℃,and the dissolved oxygen was maintained in the range of(2.0~3.5)mg/L.Using the sludge returned from the urban sewage plant as the inoculated sludge,the ratio of the traditional Chinese medicine wastewater to the urban sewage was gradually increased,and the film-forming domestication was completed in 24 days.The COD_(cr) of the influent was 1920 mg/L,when the hydraulic retention time was 24 h.The COD_(cr) removal rate was over 82%,and the COD_(cr) of the effluent was below 500 mg/L,which metthe discharge requirements.When the influent pH was the biological contact oxidation tank was 5.5~6.0,the activated sludge changes from yellowish brown to gray,the biofilm falls off,the sludge flocs in the tank were finely broken,and the effluent COD_(cr) exceeded the standard.

关 键 词：中药废水 生物接触氧化 COD_(cr)去除率 

分 类 号：X703.1[环境科学与工程—环境工程]