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

doi:10.13209/j.0479-8023.2017.045

Abstract

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

Yingchun SHAN, Conghe WANG, Jingmiao WEI, Haimei SUN, Weiling SUN. Treatment of Landfill Leachate Using A/O-Coagulation-BDD:Ⅱ. Removal Mechanism of the Organic Matters[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2017, 53(3): 507-517.

单迎春, 王琮禾, 魏婧淼, 孙海美, 孙卫玲. 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[J]. 北京大学学报自然科学版, 2017, 53(3): 507-517.

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URL: https://xbna.pku.edu.cn/EN/10.13209/j.0479-8023.2017.045

https://xbna.pku.edu.cn/EN/Y2017/V53/I3/507

Figures/Tables 11

Fig. 1 SUVA254 value of landfill leachate out of each treatment

Fig. 2 SUVA254 value of landfill leachate out of each treatment at different HRT (a) and sludge recirculation ratios (b)

Fig. 3 EEM analysis of landfill leachate out of each treatment

Fig. 4 F/DOC value of landfill leachate out of each treatment

Fig. 5 F/DOC value of effluent from each treatment at different HRT

Fig. 6 Standardized peak strength of effluents from each treatment under different sludge recirculation ratios

Fig. 7 IA/IC value of effluent from each treatment

Fig. 8 IA/IC value of leachate effluent from each treatment at different HRT and sludge recirculation ratios

Fig. 9 FTIR spectra of landfill leachate effluents after each treatment

Table 1 Qualitative analysis of organic compounds from effluent of each treatment

序号	出峰时间/min	响应值	有机物	匹配度/%
1	8.103	110678	丁酸	64
2	14.632	178999	戊酸	83
3	22.486	385157	己酸	72
4	25.269	151829	庚酸	64
5	27.638	123858	环己烷羧酸	78
6	30.114	92762	苯甲酸	83
7	34.866	117828	苯乙酸	83
8	40.341	26969	苯丙酸	94
9	65.198	49858	嘧啶	97
10	73.288	80685	十六烷酸	98
11	81.907	37335	4,4′-{1-异亚丙基苯酚}聚合物	98
12	91.282	134829	苯氧基-2,2′-亚甲基[6-(1,1-二甲基乙基)]-4-甲基	97
13	96.257	29826	1,2-苯二羧酸单脂	91

Fig. 10 GC-MS analysis of leachate effluent from each treatment

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