混凝试验中效果评判的新方法

Evaluation of coagulation treatment effect

通过对两类不同的水源进行混凝试验,发现用混凝后水的浊度来评判混凝效果的方法,对一般水质的水源是有效的,但对某些特殊水质的水源如低温低浊水,或对混凝处理后水质要求较高的场合如反渗透进水,就无法准确找出最佳的混凝剂和混凝条件。因此,提出了用测量矾花(絮凝体)大小及生长速度和泥渣虚度的指标来评判混凝试验效果的新方法,与常用的以混凝后水的浊度来评判混凝效果相比,用此方法更能准确地评判混凝试验效果的优劣。

Based on the coagulation tests given to two different water sources, it is found that the method of evaluating the coagulation effect by the turbidity of the coagulated water is effective on the source of the general water quality. But it is impossible to accurately find out the best coagulant and coagulating conditions of certain water sources with special water quality, such as water with low temperature and low turbidity, and/or in the case of having higher requirement about the water quality of the coagulated water, such as reverse osmosis influent.Therefore, it is suggested that the indexes of measuring the flocculate size, growth velocity and the compressive degrees of the sludge be used for evaluating the coagulation test effect. Compared with the method of evaluating the coagulation effect by the turbidity of the coagulated water, the new method is more accurate.