摘要:通过小试研究了微量Fe^3+对活性污泥系统的影响。将浓度为3mg/L,5mg/L,10mg/L,20mg/L,30mg/L,50mg/L和80mg/L的Fe^3+分别投加到活性污泥系统中,反应4h后测定系统出水COD、活性污泥的SVI、脱氢酶活性及其EPS组分。结果表明,FeFe^3+浓度小于50mg/L时对活性污泥的脱氢酶活性具有促进作用,浓度为10mg/L时促进作用最强;Fe^3+浓度在80mg/L以下均具有良好的絮凝作用,浓度在30mg/L以下时絮凝作用最强。两种作用的共同结果影响系统对COD的去除效果。对活性污泥EPS组分的测定表明,Fe^3+的絮凝作用对SVI的影响是主要的。
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