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首页> 美国卫生研究院文献>Iranian Journal of Environmental Health Science Engineering >Use of combined coagulation-adsorption process as pretreatment of landfill leachate
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Use of combined coagulation-adsorption process as pretreatment of landfill leachate

机译：混凝-吸附联合工艺用于垃圾渗滤液的预处理

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Landfill leachate is an important pollution factor resulting from municipal landfill sites. Physical and chemical processes are the better option for pretreatment or full treatment of landfill leachate. This article presents a combination of pre-treatment method (coagulation and adsorption) for leachate collected from municipal solid waste open dumping site. Physico chemical characteristics of stabilized and fresh leachate were examined. Coagulation process was examined by using alum and ferric chloride. A low cost adsorbent, fly ash was used for adsorption studies. Coagulation studies were carried out for fresh and stabilized leachate. Adsorption studies have been conducted for alum pre-treated stabilized leachate. Effect of coagulant dose, adsorbent dose, pH and contact time were carried out. The effective optimum coagulant dosages were 0.6 g/L and 0.7 g/L for alum and ferric chloride respectively for stabilized leachate and incase of fresh leachate 0.8 g/L and 0.6 g/L for alum and ferric chloride respectively. For the alum pretreated stabilized leachate, the maximum COD removal is 28% using fly ash adsorbent with equilibrium time of 210 min and optimum dose of 6 g/L. Overall COD removal efficiency of 82% was obtained by coagulation using alum and adsorption using fly ash for stabilized leachate. The results obtained showed that combined coagulation and adsorption process can be used effectively for stabilized leachate treatment.
机译：垃圾渗滤液是城市垃圾填埋场造成的重要污染因素。物理和化学过程是垃圾渗滤液预处理或全面处理的更好选择。本文提出了一种从城市固体废物露天倾倒场收集的渗滤液的预处理方法（凝结和吸附）的组合。检查了稳定的和新鲜的渗滤液的理化特性。使用明矾和氯化铁检查混凝过程。低成本的吸附剂粉煤灰用于吸附研究。对新鲜和稳定的渗滤液进行了混凝研究。已经对明矾预处理的稳定渗滤液进行了吸附研究。进行了凝结剂剂量，吸附剂剂量，pH和接触时间的影响。对于稳定的渗滤液，明矾和氯化铁的有效最佳混凝剂剂量分别为0.6 g / L和0.7 g / L，对于新鲜渗滤液，明矾和氯化铁的有效最佳混凝剂剂量分别为0.8 g / L和0.6 g / L。对于明矾预处理的稳定渗滤液，使用粉煤灰吸附剂的最大COD去除率为28％，平衡时间为210分钟，最佳剂量为6 g / L。通过使用明矾凝结和使用粉煤灰进行吸附以稳定沥滤液，可获得的总COD去除效率为82％。所得结果表明，混凝和吸附相结合的工艺可以有效地用于稳定的渗滤液处理。

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