Treatment leachate from MSW incineration with pretreatment/anaerobic/MBR/RO

doi:10.19965/j.cnki.iwt.2020-0785

Abstract

Abstract:

The combined process of "pretreatment/anaerobic/external MBR/RO" was used to treat the leachate in a municipal solid waste(MSW) incineration power plant in Fuzhou. The design treatment scale was 250 m³/d. The operation results showed that, the effluent concentrations of COD, BOD₅ and NH₃-N were (47.7±18.5) mg/L, (14.6±6.1) mg/L and (0.70±0.22) mg/L, respectively, which met the effluent water quality. The results of pollutants removal process showed, the removal efficiency of COD and BOD₅ in biological treatment process(both anaerobic and MBR) were respectively 98.7% and 98.6%, and the removal efficiency of TN achieved 81.5% in MBR. Therefore, COD and BOD₅ were mainly removed in anaerobic tank and MBR, while TN was primarily removed in MBR.

Key words: MSW incineration, leachate, anaerobic, external MBR, total nitrogen

摘要：

福州某垃圾焚烧发电厂采用预处理/厌氧/外置式MBR/RO工艺处理渗滤液，设计规模为250 m³/d。运行结果表明，系统出水COD、BOD₅与NH₃-N分别为(47.7±18.5)、(14.6±6.1)、(0.70±0.22) mg/L，满足出水排放限值。分析污染物降解过程发现，COD与BOD₅在生物处理系统(厌氧+MBR)中的去除率分别为98.7%与98.6%，MBR中的TN去除率为81.5%。这表明COD与BOD₅主要在厌氧池与MBR中去除，大部分TN在MBR系统中脱除。

关键词: 垃圾焚烧, 渗滤液, 厌氧, 外置式MBR, 总氮

CLC Number:

X703

Weiwei Luo,Tingyue Sun,Chunhua Huang. Treatment leachate from MSW incineration with pretreatment/anaerobic/MBR/RO[J]. Industrial Water Treatment, 2021, 41(7): 148-151.

罗威威,孙廷岳,黄春华. 预处理/厌氧/MBR/RO工艺处理垃圾焚烧渗滤液[J]. 工业水处理, 2021, 41(7): 148-151.

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URL: https://www.iwt.cn/EN/10.19965/j.cnki.iwt.2020-0785

https://www.iwt.cn/EN/Y2021/V41/I7/148

Figures/Tables 5

Table 1 Designed water quality of influent and effluent

项目	COD/(mg·L^-1)	BOD5/(mg·L^-1)	NH₃-N/(mg·L^-1)	SS/(mg·L^-1)	pH
进水	60 000	20 000	3 000	400	6~9
出水	100	30	15	30	6~9

Fig.1 Flow chart of leachate treatment process

Fig.2 Operation of leachate treatment project

Fig.3 Degradation process of primary pollutants in the process flow

Table 2 The Removal ratio of primary pollutants in each treatment unit

工序	COD	BOD₅	TN	NH₃-N
厌氧池	28.4%	28.1%	4.9%	-3.7%
MBR	70.3%	70.5%	81.5%	103.2%
RO	1.2%	1.3%	11.7%	0.4%
总去除率	99.9%	99.9%	98.1%	99.9%

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