MADong-bing,YUEZheng,DINGXi-ming,et al.Application of Two-stage AO, Built-in Ultrafiltration and Two-stage Nanofiltration Process for the Treatment of Landfill Leachate[J].China Water & Wastewater,2022,38(18):78-82.
兩級AO+內(nèi)置式超濾+兩級納濾工藝處理垃圾滲濾液
- Title:
- Application of Two-stage AO, Built-in Ultrafiltration and Two-stage Nanofiltration Process for the Treatment of Landfill Leachate
- Keywords:
- landfill leachate; two-stage AO; NF; concentrate
摘要:- 設(shè)計采用兩級AO+內(nèi)置式超濾+兩級納濾工藝處理天津市某垃圾填埋場滲濾液，處理規(guī)模為700 m3/d。一級納濾濃縮液采用兩級芬頓高級氧化處理工藝，出水回流至均衡池，處理規(guī)模為218 m3/d；二級納濾濃縮液直接回流至超濾出水池。生化系統(tǒng)產(chǎn)生的生化污泥和濃縮液處理系統(tǒng)產(chǎn)生的化學(xué)污泥，分別經(jīng)濃縮壓濾脫水后含水率達(dá)到60%，生化污泥脫水濾液回流至均衡池，化學(xué)污泥脫水濾液回流至一級芬頓反應(yīng)池，泥餅運至填埋場填埋處置。系統(tǒng)建成后運行至今，出水水質(zhì)滿足《生活垃圾填埋場污染控制標(biāo)準(zhǔn)》（GB 16889—2008）中的表2標(biāo)準(zhǔn)，COD、NH3-N、TN及TP總?cè)コ史謩e達(dá)到99.3%、99.9%、99.0%、92.3%。該工藝處理效果良好、運行穩(wěn)定、自動化程度高。項目的實施解決了該垃圾填埋場滲濾液處理能力不足的問題，具有良好的環(huán)境效益和社會效益。
Abstract:- A process consisting of two-stage AO, built-in ultrafiltration and two-stage nanofiltration was designed to treat leachate from a landfill in Tianjin, and its treatment scale was 700 m3/d. A two-stage Fenton advanced oxidation process was employed to treat the primary nanofiltration concentrate, its treatment scale was 218 m3/d, and the effluent was returned to the equalization tank. The secondary nanofiltration concentrate was returned directly to the ultrafiltration outlet tank. The biochemical sludge produced by the biochemical system and the chemical sludge produced by the concentrate treatment system were dehydrated by concentration and pressure filtration to reduce the water content to 60%. The biochemical sludge dewatering filtrate was returned to the equalization tank, the chemical sludge dewatering filtrate was returned to the primary Fenton reaction tank, and the sludge cake was transported to a landfill for landfill disposal. Since the completion of the system, the effluent quality met the table 2 limit specified in Standard for Pollution Control on the Landfill Site of Municipal Solid Waste (GB 16889-2008), and the removal efficiencies of COD, NH3-N, TN and TP reached 99.3%, 99.9%, 99.0% and 92.3%, respectively. The process had a good treatment performance, stable operation and high degree of automation. The implementation of the project has solved the problem of insufficient leachate treatment capacity of the original project, and has good environmental and social benefits.
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