摘要：

佛山市某印染企业废水产生量约为2 000 m³/d, 采用HA-MBR-臭氧的处理工艺。运行结果表明, HA段对废水色度、COD去除率分别为54%～65%、48%～58%;MBR段对废水COD、色度和氨氮的去除分为2个不同阶段, 16～45 d为Ⅰ阶段, 46～70 d为Ⅱ阶段, 相对于Ⅰ阶段, Ⅱ阶段的COD、色度和氨氮去除率明显上升, 至此阶段, COD、色度和氨氮去除率分别达到94%～98%、78%～84%和88%～92%;臭氧对废水色度和COD去除率分别为58%～78.1%和25%～46%, 出水色度为27～43倍。出水水质满足相关排放标准和回用水水质要求。直接运行成本为4.03元/m³。

关键词: 水解酸化, 膜生物反应器, 臭氧, 印染废水

Abstract:

The wastewater output of a printing and dyeing mill by HA-MBR-ozone treatment process in Foshan, Guangdong Province, is about 2 000 m³/d. The running results show that in HA section, the removing rates of chroma and COD are about 54%-65% and 48%-58%, respectively. In MBR section, the removal of wastewater COD, chroma, and ammonia-nitrogen can be divided into two different stages:16-45 days is Stage l, and 46-70 days is Stage 2. The removing rates of COD, chroma and ammonia-nitrogen in Stage 2 are obviously higher than those in Stage l. So far, the removing rates of COD, chroma and ammonia-nitrogen are 94%-98%, 78%-84% and 88%-92%, respectively. The removing rates of wastewater chroma and COD by ozone are 58%-78.1% and 25%-46%, respectively, and effluent chroma is 27-43 times. The effluent water quality can meet the requirements for relevant discharge standard and recycling water quality. The direct running cost is 4.03 yuan/m³.

Key words: hydrolytic acidification, membrane bioreactor, ozone, printing and dyeing wastewater

中图分类号: 

• X703.1