关于举办“2011年全国水处理技术培训班”的通知

　·124 　 · 膜 　科 　学 　与 　技 　术 第 31 卷 　 A study on continuous three2stage countercurrent extraction of Hacid wastewater by liquid surfactant membranes Z HA N G L i1 , D I N G Yao 2 (1. School of Environment and Civil Engineering , Wuhan Institute of Technology , Wuhan 430074 ,China ; 2. School of Chemical Engineering and Pharmacy , Wuhan Institute of Technology , Wuhan 430074 ,China) Abstract :A process of continuous three2stage countercurrent extraction for removing COD in H acid wastewater is presented based on liquid surfactant membrane methods. The effects of the ratio of Span80 to ethylhexanol ,oil to inner reagents ( Roi) ,emulsion to water phase ( Rew) and p H of wastewater on remo2ving rate of COD has also been discussed. The results show that the total removal rate of COD is 85. 3 % in the condition of Span280 ∶ ethylhexanol = 1 ∶ 1(g ∶mL) ,Roi = 1 ∶ 1. 5 ,Rew = 1 ∶ 1 and p H = 2. 0. Key words : H acid wastewater ; Liquid surfactant membrane ; three – stage countercurrent extraction (上接第 119 页) Treatment of shrimp breeding waste water using photocatalytic2membrane filtration integrated reactorS H I Zai f eng 1 , S H EN Zhongtao2 , W A N G J iacan1 , YA N G L ili1 (1. Department of chemistry , Hainan normal university , Haikou , China 571158 ; 2. Hainan Water Affairs Bureau , Haikou , China 571158) Abstract : To study the degradation of organic in shrimp breeding waste water using photocatalytic method , TiO2 powder and membrane filtration technology were integrated to tr