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混凝是水处理过程的常用工艺,良好的混凝效果对于保证优质的饮用水供应具有重要的意义。由于受研究手段的制约,目前有关原水水质、混凝剂的形态与组成对混凝过程影响的研究较为缺乏。采用南方某市水厂水源水进行了一系列的混凝试验,并针对混凝效果不佳的情况进行了新型复合药剂的制备与应用,结果表明:相比于水厂目前使用的聚合氯化铝(PACl),Al_(13)在去除浊度方面有显著优势,但水体中有机物浓度过高会在一定程度上限制Al_(13)的混凝效果。相比于浊度的去除,混凝对水体中有机物的去除需要更大的投药量。HCA作为一种阳离子有机絮凝剂,在被引入无机混凝剂之后可以显著增强复合药剂的电中和能力,在保证低投药量的同时,还能有效地提高对有机物的去除率,增大平衡时絮体的粒径,改善絮体的沉降性。
Coagulation is a commonly used process in water treatment. Good coagulation effect is of great significance to ensure the quality of drinking water supply. Due to the restriction of research methods, there is a lack of research on the quality of raw water and the influence of coagulant morphology and composition on the coagulation process. A series of coagulation experiments were carried out with the water source water of a southern city and the preparation and application of a new type of composite medicament for the poor coagulation effect were carried out. The results show that compared with the current polymerization of chlorinated Aluminum (PAC1) and Al_ (13) have obvious advantages in turbidity removal, but the high concentration of organic matter in the water will limit the coagulation effect of Al_ (13) to a certain extent. Compared with the removal of turbidity, coagulation on the removal of organic matter in water requires more dosage. As a kind of cationic organic flocculant, HCA can significantly enhance the electric neutralization ability of the composite medicament after it is introduced into the inorganic coagulant. While ensuring the low dosage, HCA can effectively improve the removal rate of organic matter and increase the balance When floc size, improve floc settlement.