膜分离法处理乙醇发酵废水研究  

Study on Ethanol Fermentation Wastewater Treatment by Membrane Separation Method

作　　者：张振闯 韩秀丽[1,2] 方书起 常春[1,2] ZHANG Zhenchuang;HAN Xiuli;FANG Shuqi;CHANG Chun(School of Chemical Engineering and Energy,Zhengzhou University;Engineering Laboratory of Henan Province for Biorefinery Technology and Equipment： Zhengzhou 450001,China)

机构地区：[1]郑州大学化工与能源学院 [2]生物质炼制技术与装备河南省工程实验室,河南郑州450001

出　　处：《水处理技术》2018年第8期57-60,共4页Technology of Water Treatment

基　　金：河南省科技攻关项目(162102210002)

摘　　要：以2级厌氧发酵生产沼气后的乙醇发酵废水为研究对象,采用微滤、超滤膜分离技术对其进行处理,考察了操作压力对膜分离效果的影响、4种超滤膜对废水COD和色度的处理效果,以及清洗方式对超滤膜通量恢复的影响。结果表明,尼龙66微滤膜在0.15 MPa下对废水COD和色度具有较好的处理效果。选取截留相对分子质量为103的聚酰胺复合膜作为超滤膜。经微滤和超滤膜2级处理后的废水COD和色度分别小于400 mg/L和80,达到GB 27631-2011的间接排放标准。酸洗+碱洗+次氯酸钠溶液组合清洗方式能有效恢复超滤膜通量,其纯水膜通量和废水膜通量分别可恢复至93.74%、91.55%。表明膜分离技术可以有效地处理乙醇废水。Ethanol fermentation wastewater was treated by MF and UF separation technology, which was from production of biogas after secondary anaerobic fermentation. Effects of operating pressure on membrane separation efficiency were investigated, the effect of four kinds of ultrafiltration membranes on COD and chroma treatment efficiency in wastewater and the effect of different cleaning methods on recovery of UF membrane flux were studied. The results showed that, nylon 66 microfiltration membrane had good performance on removal of COD and chroma at 0.15 MPa. A polyamide composite membrane with a relative molecular mass cut-off of 103 was selected as the ultrafiltration membrane. The COD and chroma of the effluent after two-stage treatment of microfiltration and ultrafiltration were less than 400 mg/L and 80, respectively, which reached the sindirect discharge regulation of GB 27631-2011. The UF membrane flux could effectively recovered by the cleaning method of acid washing, alkali washing and sodium hypochlorite washing, and the pure water membrane flux and the wastewater membrane flux recovered to 93.74% and 91.55%, respectively. The ethanol wastewater could be treated by membrane separation technology effectively.

关 键 词：乙醇发酵废水 微滤 超滤 膜污染 

分 类 号：TQ028.8[化学工程] X797[环境科学与工程—环境工程]