摘要
采用微砂强化结团絮凝工艺处理模拟废水，研究了水力停留时间、处理量、投药量、加砂量对除浊性能的影响，并分析了载体增效絮体的形成机理。结果表明，凝聚池、加注池＋熟化池、沉淀池以及总体装置的水力停留时间之比为1∶3∶7．3∶11．3，浊度去除率与进水流量具有负相关性，PAC最佳投药量为1 g/L；最优投药量、加砂条件下的连续运行浊度去除率保持在98．5%~99．5%、处理出水浊度保持在1．7 NTU以下，明显优于上述最优投药量、不加砂条件时的连续运行处理效果，较好地展示了所加微砂的增效絮凝作用。
Microsand enhanced pelleting floccu lation process has been used for treating simulated wastewater. The influences of hydraulic retention time,treatment capacity,flocculant dosage,and the dosage of sands added on tur-bidity removing capacity are investigated,and the forming mechanism of synergistic ballasted flocs are analyzed. The results show that the hydraulic retention time ratio of coagulation tank , injection tank＋maturation tank , precipita-tion tank,and the overall devices is 1∶3∶7.3∶11.3. Negative correlation is found between turbidity removing rate and influent flow rate. The optimum PAC dosage is 1 g/L. Running continuously under optimum dosages and sand adding conditions,the turbidity removing rate keeps at 98.5%-99.5%. The turbidity of treated effluent is below 1.7 NTU, obviously superior to the continuously running treatment effect above optimum dosage when sands are not added. The synergistic ballasted flocculation action of the microsands added is showed better.
作者
袁训国
桑义敏
梁存珍
韩严和
刘美丽
Yuan Xunguo Sang Yimin Liang Cunzhen Han Yanhe Liu Meili(Society and Population Institute ,Renmin University of China,Beijing 100872, China Department of Environmental Engineering ,Beijing Institute of Petrochemical Technology, Beijing 102617, China)
出处
《工业水处理》
CAS
CSCD
北大核心
2016年第12期55-58,共4页
Industrial Water Treatment
基金
国家自然科学基金项目(21677018)
北京市教委科技计划面上项目(KM201510017008)
关键词
载体絮凝
微砂增效
絮凝沉淀
ballasted flocculation
microsand synergy
flocculation precipitation
