洗毛废水的原水浓度对絮凝效果的影响

对ＰＡＣ、ＰＡＭ复合使用于洗毛废水时原水浓度与投药量关系进行了小试和中试。实验表明，ＰＡＣ与废水形成２０～３０μｍ的小絮粒，ＰＡＭ连接小絮粒形成矾花。以原水ＣＯＤ１００００ｍｇ／Ｌ为界，呈自由絮凝和拥挤絮凝两种状态。在自由絮凝时，原水ＣＯＤ：ＰＡＣ：ＰＡＭ呈７５：１：００１３，ＣＯＤ、ＳＳ去除率分别达８５％，９５％以上。拥挤絮凝时ＰＡＣ、ＰＡＭ的投量激剧增加。建议洗毛废水在自由絮凝状态下处理。

THE EFFECT OF INFLUENT DENSITY ON THE FLOCCULATION PROCESS OF WOOL SCOURING EFFLUENT

By bench scale and pilot tests using PAC and PAM as agents for Wool Scouring Effluent(WSE),the effect of influent density on the flocculation process was investigated.Results showed that particles with 20～30um was formed in WSE by PAC,then PAM connected them to become floc.Free flocculation state was recognized when influent COD10000mg/L,while crowded state was if influent COD>10000mg/L.Under free state,influent COD:PAC:PAM showed 7.5:1∶0 013 and COD and SS removal were over 85%and 95%respectively But under crowded state,the dose fo PACand PAM increased more than free state It was suggested that WSE should be treated under free state.