Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2017, Vol. 53 ›› Issue (3): 507-517.DOI: 10.13209/j.0479-8023.2017.045

• Orginal Article • Previous Articles     Next Articles

Treatment of Landfill Leachate Using A/O-Coagulation-BDD:Ⅱ. Removal Mechanism of the Organic Matters

Yingchun SHAN1, Conghe WANG1, Jingmiao WEI1, Haimei SUN2, Weiling SUN1()   

  1. 1. The Key Laboratory of Water and Sediment Sciences (MOE), College of Environmental Sciences and Engineering, Peking University, Beijing 100871
    2. School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen Key Laboratory for Heavy Metal Pollution Control and Reutilization, Shenzhen 518055; † Corresponding author, E-mail: wlsun@pku.edu.cn;
  • Received:2016-02-02 Revised:2016-03-22 Online:2017-05-12 Published:2017-05-20

A/O-混凝-BDD组合工艺处理垃圾渗滤液的研究:Ⅱ. 有机物去除机理

单迎春1, 王琮禾1, 魏婧淼1, 孙海美2, 孙卫玲1()   

  1. 1. 北京大学环境科学与工程学院, 水沙科学教育部重点实验室, 北京 100871
    2. 北京大学深圳研究生院环境与能源学院, 深圳市重金属污染控制与资源化重点实验室, 深圳 518055

Abstract:

Landfill leachate was treated by A/O-coagulation-BDD combined processes, and the organic matters during treatment processes were characterized by UV spectra, fluorescence excitation-emission matrix, GC-MS, and Fourier transform infrared spectra under optimum operating conditions. Aliphatic organic matters, tryptophan-like matters, and some fulvic acid-like organic matters can be easily removed by A/O treatment while humic acid-like organic matters can not. The removal efficiencies of ryptophan-like matters and fulvic acid-like organic matters were better as HRT increasing from 4.0 d to 10.7 d. As sludge recirculation ratio increasing from 3.0 to 3.5, the removal efficiency of ryptophan-like matters was better while the removal efficiency of fulvic acid-like organic matters was worse. Coagulation mainly removed aliphatic organic matters, proteins, and some humic acid-like organic matters, but can’t easily remove fulvic acid-like organic matters, and there were still some aroma organic matter in the effluent. BDD treatment can effectively remove kinds of refractory organic matters.

Key words: landfill leachate, group technology, organic matter, spectrum, GC-MS

摘要:

在A/O-混凝-BDD组合工艺系统最优运行条件下, 采用紫外扫描、分子荧光、GC-MS、红外光谱等多种方法从不同角度深入分析A/O-混凝-BDD组合工艺的各段工艺进出水有机物组成和结构特性的变化, 剖析不同工艺去除有机物的机理。结果表明, A/O工艺对脂肪族有机物支链和类色氨酸容易去除, 对类富里酸有较好的去除, 而对类腐殖酸较难去除; 水力停留时间(HRT)从4.0 d增加至10.7 d时, 增强了系统对类色氨酸和类富里酸的去除; 回流比从3.0增加至3.5时, 增强了系统对类色氨酸的去除, 但对类富里酸的去除效果变差。混凝过程主要去除脂肪族和蛋白质类有机物以及类腐殖酸, 对类富里酸去除效果较差, 出水中仍残留部分芳香性物质。BDD对渗滤液中残留的各种难降解有机物均能够有效降解。

关键词: 垃圾渗滤液, 组合工艺, 有机物, 光谱, GC-MS