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首页> 外文期刊>Journal of Environmental Engineering >Effects of Chemical Conditioners on Deep Dewatering of Urban Dewatered Sewage Sludge in the Temporary Sludge Lagoon
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Effects of Chemical Conditioners on Deep Dewatering of Urban Dewatered Sewage Sludge in the Temporary Sludge Lagoon

机译：化学条件对临时污泥泻湖城市脱水污水深水深水的影响

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摘要

To solve problems regarding the urgent need for deep dewatering of massive urban dewatered sewage sludge in the temporary sludge lagoon (UDSS-TSL), this study investigated the effects of various chemical conditioners on the deep dewatering of UDSS-TSL. The study used sludge-specific resistance to filtration, coefficient of consolidation, permeability coefficient, bound-water content, total nitrogen (TN), total phosphorus (TP), and chemical oxygen demand (COD) in the filtrate as indices to evaluate the conditioning effect. It was found that the influence of flocculation conditioners on the deep dewatering of UDSS-TSL is relatively low. Skeleton-builder conditioners, coal powder for example, did not improve the dewaterability of UDSS-TSL. Since CaO has the capabilities of flocculation, skeleton building, and cell disruption, the experimental results showed that, compared with other conditioners used in this study, CaO had the most significant effect. With a CaO dosage of 67% dry solids, specific resistance to filtration decreased by 80% compared with that of the raw sludge, the consolidation coefficient at each level of stress increased 3.5-8.2 times that of the raw sludge, and the water content was 40% after complete consolidation under 100 kPa. These results indicate that CaO conditioning for deep dewatering of UDSS-TSL is feasible.
机译：为了解决关于临时污泥泻湖（UDSS-TSL）在临时城市脱水污水污泥的迫切需要迫切需要的问题，本研究研究了各种化学调理剂对UDSS-TSL的深水脱水的影响。该研究使用污泥特异性抗过滤，固结系数，渗透系数，结含水含量，总氮（TN），总磷（TP）和滤液中的化学需氧量（COD）作为评估调理的索引影响。发现絮凝式调理剂对UDSS-TSL的深水的影响相对较低。骨架 - 助洗剂，例如煤粉，没有改善UDSS-TSL的脱水性。由于CAO具有絮凝，骨架建筑和细胞破坏的能力，因此实验结果表明，与本研究中使用的其他护发素相比，CAO具有最显着的影响。对于67％干固体的CaO剂量，与原料污泥相比，对滤液的特异性抗过滤减少了80％，每个压力水平的固结系数增加了3.5-8.2倍的原料污泥，水含量为3.5-8.2倍在100 KPA下完全合并后40％。这些结果表明，用于UDSS-TSL的深脱水的CAO调理是可行的。

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