作　　者： ; ; ;

机构地区： 华南理工大学轻工与食品学院制浆造纸工程国家重点实验室

出　　处： 《中国造纸学报》 1999年第B10期68-72,共5页

摘　　要： 研究了用无机絮凝剂PAC、PSA、PFS、MgCl2、CaO及其与有机高分子絮凝剂CGA复合使用对两种不同工艺漂白废水的混凝处理特性。结果表明:不同处理工艺漂白废水的混凝特征明显不同,水质1最佳絮凝效果为CODcr、AOX去除率分别为632%、453%,水质2的COD、AOX去除率达731%、534%。氧化钙与碳酸钠具有相同的降解AOX能力,硫离子在中性条件下可显著提高AOX的去除率。复合混凝剂优于单一混凝剂的混凝效果,且投药方式、顺序和反应中的pH、搅拌方式也有很大的影响,而温度则影响不大。化学污泥具有较高的热值和较高的无机盐含量,可加以回收利用。 PAC, PES, MgCl 2 and CaO, with and without the addition of that organic coagulant, were employed for treating bleaching effluent from two different bleaching technologies, and their effects on the removal of COD,SS,and AOX were examined. Different results were being observed. Maximum removal of COD and AOX for effluent No.1 were reported as 63.2% and 45.3% respectively, whereas for effluent No.2 the corresponding figures were 73.1% and 53.4%. Sodium carbonate was found to be as effective as CaO for reducing AOX. And , AOX reduction was significantly more pronounced in the presence of sulfide ion. With the addition of CGA organic coagulant to any one of the inorganic coagulants, it was found to result in much improved removals. It was also noted that the degree of removal was much affected by the method and changing of the reaction pH, and the method of agitation. Temperature seemed to be of minor importance.The heat value of the resulted chemical sludge depended on its inorganic component content;it can be recovered as a byproduct. The mechanism of coagulation was also investigated through its kinetics.

关 键 词： 絮凝法处理 漂白废水 无机絮凝剂 混凝处理 复合混凝剂 氧化钙 工艺

领　　域： [轻工技术与工程] [环境科学与工程]