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首页> 外文期刊>Journal of Solid Waste Technology and Management >ENGINEERING PROPERTIES OF WASTEWATER TREATMENT SLUDGE MODIFIED BY HYDRATED LIME AND FLY ASH
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ENGINEERING PROPERTIES OF WASTEWATER TREATMENT SLUDGE MODIFIED BY HYDRATED LIME AND FLY ASH

机译：石灰和粉煤灰改性废水处理污泥的工程性能

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摘要

This paper presents experimental results concerning the engineering properties of modified sludge from wastewater treatment using hydrated lime and fly ash. The proper mixing ratio was determined as the ratio required to keep the pH of the modified sludge above 12.0 for 2 hours. Extensive laboratory tests were carried out, including particle size analysis, compaction and CBR tests, SEM, unconfined compression tests, permeability tests, and TCLP tests. Although the main function of lime is to sterilize microorganisms in the sludge, it has an effect on mechanical properties as well. The unconfined compressive strength of the sludge modified by fly ash and lime was found to satisfy the criteria for landfill cover soil, which requires a value above 0.1 MPa. The hydraulic conductivity of all the mixtures was approximately 10~(-7) cm/sec. Extraction tests revealed the modified sludge to contain quantities of cadmium, copper, and lead. Judging from the extensive testing presented here, the use of fly ash and hydrated lime to modify or stabilize wastewater treatment sludge would be an interesting way to transform this waste material into a usable construction material.
机译：本文介绍了有关用熟石灰和粉煤灰处理废水的改性污泥的工程特性的实验结果。确定合适的混合比例为将改性污泥的pH保持在12.0以上2小时所需要的比例。进行了广泛的实验室测试，包括粒度分析，压实和CBR测试，SEM，无侧限压缩测试，渗透性测试和TCLP测试。尽管石灰的主要功能是对污泥中的微生物进行灭菌，但它也对机械性能产生影响。发现粉煤灰和石灰改性的污泥的无限制抗压强度满足填埋覆盖土壤的标准，该标准要求其值高于0.1 MPa。所有混合物的水力传导率约为10〜（-7）cm / sec。提取测试表明，改性污泥中含有一定量的镉，铜和铅。从这里提出的广泛测试来看，使用粉煤灰和熟石灰来改性或稳定废水处理污泥将是一种有趣的方式，可以将这种废料转化为可用的建筑材料。

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