应用铁铝共聚物对垃圾渗滤液进行预处理的研究

Pre -Treatment of Landfill Leachate with Flocculant Copolymers of Al(Ⅲ) and Fe(Ⅲ)

采用室内试验方法,研究了无机高分子絮凝剂——铁铝共聚物(CPAFC)(B=1.5,0.1mol·L-1)对太原市新沟垃圾卫生填埋场渗滤液的絮凝处理效果。结果表明,将聚合氯化铝(PAC)、聚合氯化铁(PFC)和不同配比(Fe/Al)CPAFC应用于垃圾渗滤液处理工艺中,其沉降时间、浊度去除率和CODCr去除率不同,其中,CPAFC(Fe/Al=7/3)最为理想。结果还表明,CPAFC(Fe/AL=7/3)投加量和垃圾渗滤液pH值均会对其絮凝效果产生影响,当絮凝剂投加量为35mL·L-1,pH值在7.0左右(中性条件)时,对渗滤液的絮凝处理效果最好。

A treatment of landfill leachate wi th an inorganic -macromolecular -flocculant copolymers of Al (Ⅲ)and Fe(Ⅲ)(CPAFC,B =1.5,0.1mol·L -1 )was studied.The results showed that during the pre -treatment of landfil l leachate,settling character and the removal rates of tu rbidity and COD Cr were different with the flocculants:polyaluminiumchloride(PAC),polyferric chloride(PFC),and CPAFC of different ratio(Fe /Al ),and CPAFC(Fe /Al =7/3)has a better effect.The results also indicated that under the condition of the addition of CPAFC(Fe /Al =7/3)at around 35mL·L -1 ,pH at ca.7.0,the best flocculating effect of treatment could be achieve d.