加碱混凝沉淀法去除蓝皮制革废水中Cr^(3+)及COD的研究  

Study on Removing Cr^(3+) and COD in the Blue-Wet Skin Wastewater Through Adding Alkali and Coagulating

作　　者：罗亚红[1] 何成达[1] 唐礼庆[1] 李悦 吴彩芳 

机构地区：[1]河海大学环境科学与工程学院,江苏南京210098 [2]昆山市自来水集团有限公司,江苏昆山215300 [3]海军东海设计院,上海200083

出　　处：《环境科学与管理》2006年第9期109-112,共4页Environmental Science and Management

摘　　要：取自扬州某外资皮革厂的蓝皮制革废水舍有大量的Cr3+和COD。通过对该废水加各种碱剂调节其pH值至8．3-8．5,均可将Cr3+去除90％以上,且对COD也有一定的去除效果。再对该废水加碱的同时试采用几种混凝剂进行混凝,Cr3+和COD的去除率都得到提高。研究表明:通过加碱混凝能取得更好的去除效果,PAC／PAM是最佳混凝剂,最佳投药量为0．4g／L,Cr3+可降到国家标准以下。The blue - wet skin wastewater getting from certain foreign capital leather factory in Yangzhou contains a mass of Cr^3＋ and COD. Through adding some kinds of alkali in wastewater to adjust its pH about 8.3- 8.5, which can remove above 90% of Cr^3＋ , at the same time have affect on removing COD. And then adding alkali and some kinds of coagulation in the wastewater, the removing rate of Cr^3＋ and COD all can be enhanced. The result suggests that ： PAC/PAM are the best coagulation accelerator, and optimal dosage is 0.4g/L, the concentration of Cr^3＋ can also be reduced below the national regulation.

关 键 词：碱剂 铬鞣 混凝 

分 类 号：X703[环境科学与工程—环境工程]