YUJin,ZHONGQuan-fa,DINGYu-xin,et al.Pilot Investigation on UV Fenton for Treatment of Landfill Leachate Membrane Concentrate[J].China Water & Wastewater,2025,41(1):107-114.
紫外光芬顿处理垃圾渗滤液膜浓缩液中试研究
- Title:
- Pilot Investigation on UV Fenton for Treatment of Landfill Leachate Membrane Concentrate
- 摘要:
- 选取深圳市某垃圾填埋场渗滤液膜浓缩液为研究对象，采用高功率紫外光芬顿（HP-UV Fenton）高级氧化工艺对其进行处理，同时通过正交试验优化中试运行条件，并对膜浓缩液的处理效果进行分析。此外，还对比了同等条件下HP-UV Fenton与低功率紫外芬顿（LP-UV Fenton）处理垃圾渗滤液膜浓缩液的效果，重点考察其对COD、TOC、TN的去除率与生化性提升的效果，并采用三维荧光光谱（EEM）、轨道离子阱高分辨质谱（Orbitrap MS）对两种处理系统出水中溶解性有机物（DOM）进行分析。结果表明，同等条件下HP-UV Fenton体系对COD的去除率达到83%，比LP-UV Fenton高13%；对TOC的去除率为63%，比LP-UV Fenton体系高12%；两种系统对TN的去除率无明显差异；在可生化性方面，HP-UV Fenton出水B/C达0.25，而LP-UV Fenton为0.15。光谱与质谱分析结果表明，相较于LP-UV Fenton，HP-UV Fenton对水中腐殖酸与富里酸的去除率更高，并对膜浓缩液中高氧化度的物质有更好的去除效果。经济性分析表明，浓缩液的处理成本为58.01 元/m3。综上所述，采用HP-UV Fenton工艺处理垃圾渗滤液膜浓缩液具有良好的可行性。
- Abstract:
- The landfill leachate membrane concentrate from a landfill site in Shenzhen was treated through a pilot-scale high-power ultraviolet Fenton (HP-UV Fenton) advanced oxidation process, the operation conditions were optimized by means of orthogonal test, and the treatment performance was analyzed. Furthermore, the performances of HP-UV Fenton and low-power ultraviolet Fenton (LP-UV Fenton) for the treatment of landfill leachate membrane concentrate under the same circumstances were compared, with a focus on the removal efficiencies of COD, TOC and TN and the improvement of biodegradability. Excitation-emission-matrix spectra (EEM) and orbitrap mass spectrometry were employed to analyze the dissolved organic matter (DOM) in the effluent from the two treatment systems. Under the same circumstances, the COD removal efficiency of the HP-UV Fenton system attained 83%, which was 13% higher than that of the LP-UV Fenton system. The removal efficiency of TOC amounted to 63%, being 12% higher than that of the LP-UV Fenton system. There was no significant disparity in the TN removal efficiency between the two systems. Regarding biodegradability, the effluent B/C ratio of HP-UV Fenton amounted to 0.25, while that of LP-UV Fenton reached 0.15. The findings of spectrum and mass spectrometry indicated that, in contrast to LP-UV Fenton, HP-UV Fenton had higher removal efficiencies of humic acid and fulvic acid in water and demonstrated a better removal performance for high?oxidation substances in membrane concentrate. The economic analysis indicated that the treatment cost of the concentrate amounted to 58.01 yuan/m3. In conclusion, it is feasible to treat landfill leachate membrane concentrate through the HP-UV Fenton process.
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