硅藻土在城市污水处理中的应用研究

采用硅藻土对污水处理厂进水进行混凝处理,尝试将硅藻土混凝和微滤分离膜处理技术相结合对污水进行处理。试验结果表明,硅藻土用于城市污水处理,效果显著。当硅藻土用量为300mg/L时,结合微滤分离膜系统,能够满足生活杂用和市政杂用所需水质要求。应用环境扫描电镜表征硅藻土混凝前后的组分和表观特征,初步提出了硅藻土的污水处理机理为吸附、混凝和中和三个协同作用。

Study on application of diatomite in municipal wastewater treatment

Diatomite has been used in municipal wastewater treatment as coagulating agent combined with membrane micro-filtration technique. The results of this operation seem fair, in case when diatomite dosing is 300 mg/L, and the effluent is good enough to meet the requirements of miscellaneous water for municipal and domestic reuses. The apparent characters of diatomite before and after coagulation are observed by a electronic scanning microscope and it is believed that there are synergisms of adsorption, coagulation and neutralization in the diatomite process.