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首页> 外文期刊>Water Science and Technology >Ferric coagulant recovered from coagulation sludge and its recycle in chemically enhanced primary treatment
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Ferric coagulant recovered from coagulation sludge and its recycle in chemically enhanced primary treatment

机译：从混凝污泥中回收的铁凝结剂及其在化学强化一级处理中的再循环

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An investigation was conducted to study the feasibility of ferric coagulant recovery from chemical sludge and its recycle in chemically enhanced primary treatment (CEPT) to make the process more cost-effective, as well as reduce sludge volume. The optimum conditions and efficiency of the acidification for ferric coagulant recovery from coagulation sludge were investigated. Experimental results showed that the recovered coagulants can be used in CEPT and the pollutants removal efficiency is similar to that of fresh coagulant, and for some aspects the effect of recovered coagulants is better than that of fresh ones, such as turbidity removal. Although some substances will be enriched during recycle, they have little effect on treated wastewater quality. Acidification condition also had significant influence on reduction of sludge volume. The efficiency of coagulant recovery had a linear relationship with sludge reduction. Experiments verify that it would be a sustainable and cost-effective way to recover ferric coagulant from coagulation sludge in water treatment and chemical wastewater treatment, and then recycle it to CEPT, as well as reduce sludge volume.
机译：进行了一项研究，以研究从化学污泥中回收铁凝结剂及其在化学强化一级处理（CEPT）中循环使用的可行性，以使该过程更具成本效益，并减少污泥量。研究了从混凝污泥中回收铁酸混凝剂的最佳酸化条件和效率。实验结果表明，回收的混凝剂可用于CEPT，其污染物去除效率与新鲜混凝剂相似，在某些方面，混浊去除效果优于新鲜混凝剂。尽管某些物质在回收过程中会富集，但它们对处理后的废水质量影响很小。酸化条件对减少污泥量也有重要影响。凝结剂回收效率与污泥减少量成线性关系。实验证明，这是一种在水处理和化学废水处理中从混凝污泥中回收铁凝结剂，然后将其再循环到CEPT并减少污泥量的方法，将是一种可持续且具有成本效益的方法。

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