环境工程学报2018，Vol.12Issue(4)：1046-1054,9.DOI:10.12030/j.cjee.201710039
超滤在乙醇厌氧沼液资源化回用中的应用
Application of ultrafiltration in treatment of ethanol anaerobic digestion effluent for recycling use
摘要
Abstract
Recycling the treated anaerobic digestion effluent (ADE) for use in ethanol production process can alleviate some problems such as large water consumption in production process and the subsequent expensive wastewater treatment for standardized discharge.Considering that ultrafiltration (UF) membrane is instrumental for the removal of microorganisms contained in the ADE,this method focused on the feasibility of tubular ultrafiltration (UF) membrane to treat the ADE for the future recycling use.Results showed that the reasonable condition was the ADE temperature of 50 ℃,membrane surface velocity of 4.5 m·s-1 and water production rate of 30％.Under the controlled condition,a desired membrane flux was obtained to be 174 L·(m2·h)-1.Further,the membrane fouling was taken into consideration.It was found that the pollutants should be divided into inorganic compounds,mainly consisting of metal elements Ca2+,Mg2+,Fe3+,and organic substances,i.e.,hydrocarbons,fatty acids and their derivatives,humic acid and fulvic acid.Exploration of membrane washing method showed that these foulants were removed using citric acid and sodium hypochlorite solution,followed by sodium hydroxide solution.With this membrane washing method,the membrane flux recovered above 98％.These results indicate that the UF treatment can effectively remove the microorganisms living in the ADE to avoid the slurry acidification in the ethanol production process.关键词
超滤/去除微生物/厌氧沼液/回用/膜污染和清洗Key words
ultrafiltration/removal of microorganism/anaerobic digestion effluent/recycling use/membrane fouling and washing分类
资源环境引用本文复制引用
王团,薛宏光,王柯,毛忠贵,张建华..超滤在乙醇厌氧沼液资源化回用中的应用[J].环境工程学报,2018,12(4):1046-1054,9.基金项目
国家自然科学基金青年科学基金资助项目(21506075) （21506075）
江苏省自然科学基金青年基金资助项目(BK20150131) （BK20150131）
111引智计划(111-2-06):江苏省连云港市“港城英才计划” （111-2-06）
