高铁酸钾强化磁絮凝去除污水厂二级出水有机物  

Potassium Ferrate Enhanced Magnetic Flocculation for the Removal of Organic Matters in Effluent from Secondary Treatment Process

作　　者：关鹤达 杨博暄 温沁雪 邹东雷 马军 陈志强 GUAN He‑da;YANG Bo‑xuan;WEN Qin‑xue;ZOU Dong‑lei;MA Jun;CHEN Zhi‑qiang(School of Environment,Harbin Institute of Technology,Harbin 150090,China;College of New Energy and Environment,University of Jilin,Changchun 130021,China)

机构地区：[1]哈尔滨工业大学环境学院,黑龙江哈尔滨150090 [2]吉林大学新能源与环境学院,吉林长春130021

出　　处：《中国给水排水》2023年第21期73-77,共5页China Water & Wastewater

基　　金：国家重点研发计划项目(2022YFC3203101)。

摘　　要：磁絮凝工艺已广泛用于城镇污水的深度处理,为强化磁絮凝单元对出水有机物的去除能力,从投加量和预氧化时间两个方面探究高铁酸钾强化磁絮凝对二级出水中有机物的去除效果。结果表明,高铁酸钾可强化磁絮凝工艺对有机物的去除效果,在投加量为20 mg/L、预氧化时间为10 min时处理效果达到稳定,对二级出水TOC的去除率为16.21%,对UV_(254)的去除率为43%。三维荧光总体积减少的结果表明,高铁酸钾可以去除水中微生物的代谢产物、腐殖酸、富里酸类有机物。分子质量分布的结果表明,高铁酸钾氧化能力有限,主要是将大部分腐殖酸类大分子质量物质分解成大量小分子质量的腐殖酸类单体,且是一个两阶段的动态分解过程。Magnetic flocculation process is widely used for the advanced treatment of urban sewage.The performance of potassium ferrate enhanced magnetic flocculation for the removal of organic matters was investigated from two aspects of potassium ferrate dosage and pre‑oxidation time,so as to enhance the ability of magnetic coagulation unit for the removal of organic matters in the effluent from the secondary treatment process.Potassium ferrate enhanced the performance of magnetic flocculation process for the removal of organic matters,and the treatment performance was stable when the dosage was 20 mg/L and the pre‑oxidation time was 10 min,which demonstrated the removal rates of 16.21%for TOC and 43%for UV_(254).The decrease of total three‑dimensional fluorescence volume showed that potassium ferrate could remove the organic matters such as microbial metabolites,humic acids,and fulvic acids from water.The molecular weight distribution showed that potassium ferrate had limited oxidation capacity,and mainly decomposed most large molecular weight humic acids into a large number of small molecular weight humic acid monomers,and the degradation was a two‑stage dynamic decomposition process.

关 键 词：高铁酸钾 磁絮凝 二级出水 有机物 

分 类 号：TU992[建筑科学—市政工程]