磁微滤膜法高效脱氮除磷技术的试验研究

Study on Nitrogen and Phosphorus Removal Technology by Magnetic Microfiltration Membrane

通过对磁微滤膜法高效脱氮除磷技术的试验研究,对比研究了工艺流程1“微磁絮凝反应系统-磁微滤分离系统-Bio-O好氧池”与工艺流程2“Bio-O好氧池-微磁絮凝反应系统-磁微滤分离系统”的脱氮除磷效果。考察生化工艺(Bio-O好氧池)的除磷能力,以及对物化工艺(磁微滤)加药量的影响。结果表明,磁微滤分离系统对总磷去除率平均为94%,Bio-O好氧池对氨氮的去除率>90%,硝化负荷最高可达0.33 kgNH_(3)-N/m^(3)/d。工艺流程2中,生化工艺在前,Bio-O的生物除磷作用不仅减少了后段磁微滤工艺的加药量,药剂投加量上可节约40%,还有利于提高磁微滤膜法整体工艺的稳定性,系统抗冲击负荷更高。综合考虑,工艺流程2更适用于污水脱氮除磷,在减少物化加药量的同时,可保证出水总磷及悬浮物稳定达标。

Through the experimental study of the efficient nitrogen and phosphorus removal technology by magnetic microfiltration membrane method,the effect of process one "micro-magnetic flocculation reaction system-magnetic microfiltration separation system-Bio-O aerobic tank" and process two "Bio-O aerobic tank-micro magnetic microfiltration separation system" was compared and studied.The phosphorus removal capacity of biochemical process(Bio-O aerobic tank) and the influence on the dosage of chemical process(magnetic microfiltration) were investigated.The results showed that the magnetic microfiltration averaged 94% of total phosphorus removal,the Bio-O aerobic tank removed more than 90% of ammonia nitrogen,and the nitrification load was up to 0.33kgNH_(3)-N/m^(3)/d.In process two,the biochemical process is set before,the biological phosphorus removal of Bio-O not only reduced the dosage of the posterior magnetic microfiltration process,saved 40% in the dosage of the agent,but also helped to improve the stability of the overall process of the magnetic microfiltration membrane method,and the system impact resistance was higher load.In comprehensive consideration,the process flow two was more suitable for sewage nitrogen and phosphorus removal.While reducing the amount of physical and chemical dosage,the total effluent phosphorus and suspended solids could ensure the standard stably.