复合有机物污染的含铁、锰源水生物净化研究  

Performance of Biofilter for Simultaneous Removal of Iron,Manganese and COD_(Mn)

作　　者：蔡言安[1] 曾辉平[2] 李冬[2] 毕学军[1] 张杰[2,3] 

机构地区：[1]青岛理工大学环境与市政工程学院,山东青岛266033 [2]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [3]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《中国给水排水》2016年第17期34-38,共5页China Water & Wastewater

基　　金：国家自然科学基金优秀青年科学基金资助项目(51222807)

摘　　要：对受铁、锰及可生物降解有机物污染的水体,采用模拟生物滤柱进行同步净化试验研究。装置采用重力流过滤和上向流曝气过滤两种运行模式,结果表明,当进水DO浓度满足污染物氧化需求时,重力流过滤可实现对三者的同步去除,出水水质满足饮用水卫生标准要求;继续提高进水COD_(Mn)浓度时,DO不足导致除锰效果恶化,而铁与COD_(Mn)的去除效果受影响较小。上向流底部曝气可解决DO不足的问题,但曝气作用使滤层的截留能力减弱,导致铁锰氧化物随水流流出滤层;曝气强度较高时易引起出水铁、锰浓度超标,而弱曝气强度可实现三者的出水达标。曝气强度对去除COD_(Mn)的影响不明显,去除率始终高达80%。A pilot-scale biofiher was constructed to remove iron, manganese and CODMn from a simulated water source. The biofilter was operated by gravity flow and upward flow filtration with aera- tion. The results indicated that these contaminants could be simultaneously removed in the gravity flow mode when dissolved oxygen （DO） in the influent met the oxidation demand. A higher CODMn concentra- tion in the influent could lead to an insufficient DO for manganese removal, but the removal of iron and CODMn was little affected. Upward flow filtration with aeration at the bottom of the biofilter provided a bet- ter way to improve DO. While the aeration could impair the interception capacity of filter bed and force the metal oxides to flow out of the biofiher. The concentrations of iron and manganese in the effluent could exceed the discharge standards when the aeration intensity was high. While the weak aeration in-tensity could ensure that the concentrations of iron, manganese and CODMn in the effluent met the dis- charge standards. CODMn removal efficiency in the whole operation period was in the level of 80% and not significantly affected by the aeration intensity.

关 键 词：生物滤池 微污染水体 曝气强度 过滤模式 

分 类 号：TU991.2[建筑科学—市政工程]