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首页> 外文会议>International conference on waste management and technology >Impacts of Conditioner Dose on Dewaterability and Physicochemical Characteristics of Activated Sludge
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Impacts of Conditioner Dose on Dewaterability and Physicochemical Characteristics of Activated Sludge

机译：调节剂用量对活性污泥脱水性能及理化特性的影响

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In this paper, a high molecular weight cationic organic polymer of CZ-8698 was employed to condition the activated sludge (AC), and the variation of physicochemical characteristics of the sewage sludge, such as dewaterability, surface electrical property, morphology and strength, with CZ-8698 doses were analyzed. Then some relations between the corresponding parameters to above characteristics and the conditioner doses were also investigated. The results showed that CZ-8698 doses had a great impact on the dewaterability and physicochemical characteristics of AC. The optimal range for CZ-8698 dose was 4.28-7.13g·kg-1·SS-1, and the corresponding minimum values for capillary suction Time (CST) and specific resistance to filtration (SRF) were (12.62±1.39)s and 0.56×1012m·kg-1, correspondingly. While at the CZ-8698 dose much less than 4.28g· kg-1·SS-1, the viscosity of supernatant after AC centrifugation presented the minimum value. In the optimum CZ-8698 dosage range, both the zeta potential and surface charge density of colloids in AC centrifugal supernatant changed into positive values from negative ones, AC floes showed the most irregular boundary or surface and much compact structure, which was demonstrated by their fractal dimensions of 1.09(one-dimensional fractal dimension, D1) and 1.51 (two-dimensional fractal dimension, D2). Although the particle size for AC floes increased with the increase of CZ-8698 doses, the strength of these floes gradually tended to keep constant at the conditioner doses higher than 4.60g·kg-1·SS-1, and their median diameter can reach several thousands of micrometers or larger.
机译：本文采用高分子量阳离子有机聚合物CZ-8698来处理活性污泥（AC），并处理污水污泥的理化特性，如脱水性，表面电性能，形貌和强度等变化。分析了CZ-8698的剂量。然后，还研究了与上述特性相对应的参数与调节剂剂量之间的一些关系。结果表明，CZ-8698剂量对AC的脱水性能和理化特性有很大影响。 CZ-8698的最佳剂量范围为4.28-7.13g·kg-1·SS-1，相应的毛细管抽吸时间（CST）和比过滤抗性（SRF）的最小值为（12.62±1.39）s和分别为0.56×1012m·kg-1。 CZ-8698的剂量远小于4.28g·kg-1·SS-1，而AC离心后上清液的粘度为最小值。在最佳的CZ-8698剂量范围内，交流离心上清液中胶体的zeta电位和表面电荷密度均从负值变为正值，交流絮凝物显示出最不规则的边界或表面，并且结构紧凑，这由它们的结构证明。分形维数为1.09（一维分形维数D1）和1.51（二维分形维数D2）。尽管AC絮凝剂的粒径随CZ-8698剂量的增加而增加，但在高于4.60g·kg-1·SS-1的调节剂剂量下，这些絮凝剂的强度逐渐趋于保持恒定，并且它们的中值直径可达到几千微米或更大。

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