磁场强化活性污泥法处理城镇污水研究

目的]探讨外加磁场及不同场强提高活性污泥法生物脱氮除磷系统运行的稳定性与系统脱氮除磷效率的可行性。方法]试验分别建立两套采用序批反应型式的平行对比试验系统,开展外加磁场强化城镇污水生物脱氮除磷技术研究,并选取典型城镇污水处理厂在不同磁场强度条件下进行了磁场强化生物脱氮除磷效果比较分析。结果]在15～24℃条件下,外加高强磁场（1 500 Gs）的活性污泥系统较对比系统COD、NH3-N、PO43--P去除率分别提高1.3%、0.2%和10.0%;外加中强磁场（800Gs）的活性污泥系统较对比系统COD、NH3-N、PO43--P去除率分别提高10.7%0、.4%和6.1%。结论]高强磁场作用下的活性污泥在试验初期能迅速提高其对有机物的去除能力,中强磁场作用下的活性污泥能提高其对有机物及磷酸盐的去除能力。

Contrastive Studies on Experiment of Activated Sludge Method Enhanced by Magnetic Field for Treating Urban Wastewater

Objective] The study aimed to discuss the additional magnetic field and different magnetic field intensity in improving the stability of biological N and P removal system operation by the activated sludge method and the feasibility of N and P removal by this system.Method] Two sets of parallel contrast test system with the sequencing batch reaction type were established in the test to conduct the study on the biological N and P removal technology enhanced by magnetic field for treating the urban wastewater and the typical town sewage treatment plant was selected to make for the comparison analysis on the biological N and P removal enhanced by magnetic field under the different magnetic field intensity.Result] Compared with the contrastive system,under the temperature of 15-24 ℃,the activated sludge system enhanced by additional high magnetic field(1 500 Gs) could increased the removal rate of COD,NH3-N and PO43—P by 1.3%,0.2% and 10.0%;the activated sludge system enhanced by additional middle magnetic field(800 Gs) could increased the removal rate of COD,NH3-N and PO43——P by 10.7%,0.4% and 6.1%.Conclusion] The activated sludge under the action of high strength magnetic field could quickly improve its removal ability on the organic matter in the early test and that under the action of middle strength magnetic field could quickly improve its removal ability on the organic matter and phosphate.