洗浴废水处理与回用的试验研究

The Treatment and Reuse of the Bathing Wastewater

洗浴废水是一类水量大、污染程度轻的生活污水,便于实现处理及回用.对洗浴废水的处理确定了混凝,石英砂、无烟煤过滤,臭氧氧化和活性炭吸附的工艺流程.通过实验分别确定了适用的混凝剂,最优的投加量、混凝时间、搅拌速度、曝气量、曝气时间等工艺参数,研究了pH值和曝气时间对臭氧化处理的影响和不同量的活性炭对废水COD的去除效果并对其原因作了适当地分析.实验证明,对COD在80～200mg/L之间的洗浴废水,经本工艺处理后,其COD值降至10mg/L以下,且水质符合细菌学指标。

Bathing wastewatr is a kind of sewage,characterized with high flow and slight pollution, easy to be disposed and reused.In this paper,flocculation,filtration,ozone oxidation and active carbon adsorption were combined to treat bathing wastewater and analyze the result. Finally optimums were determined. In the process, polychlorination aluminum was choosed as the ideal flocculation and got the best add to 1/200. The most reasonable flocculation time is 20min. The cylinder reactor was adopted,pillar high 1000mm, inside path 45mm. Through the experiment, for 1600mL wastewater(the water pillar is high for 1000 cm), the best measure for ozone oxidation is 200mL/min, the best time is 15-20min. In addition, the raw water's PH have a big influence on the getting rid of COD, the raw water was adjusted to the tiny alkaline (pH=9-11)and immediately the COD will decline to 5 mg/L below. The active carbon is good for recycling the wastewater,particularly for the water whose COD is demanded below 10 mg/L,their COD was returned to the standard for use, and bad smell can be removed as well.It was proved that COD of effluent, which initially ranged from 80 to 200mg/L,was at last under 10mg/L.