Abstract:

Landfill leachate belongs to high-concentration organic wastewater，which has the characteristics of large seasonal fluctuations in water quality and quantity，and difficult treatment. After decades of rapid development，the leachate industry has made remarkable achievements. However，the existing leachate treatment process and equipment selection are too pursued to meet the basic production capacity and meet the emission standards，and ignore the requirements of low energy consumption，resulting in the large amount of carbon added，too high energy consumption. So，the professional and refined operation management needs to be strengthened. The energy-saving and efficiency-increasing technical measures in the field of leachate treatment from the aspects of optimizing the selection of biological denitrification process were discussed on improving the water flow conditions of the biological tank and the blast aeration system，and focusing on the selection of key equipment such as the mixed liquid reflux pump，blower，aerator，MBR ultrafiltration membrane，etc. Furthermore，the advanced treatment process preferentially selecting the non-membrane process under the premise of meeting the effluent discharge standard were analyzed. We applied the new biological denitrification process，changed the water flow conditions of the biological pool and the type of the mixed liquid return pump，and precisely controlled of the blast aeration system and the selection of the built-in MBR. The power consumption of the system was saved by 10.64，0.9，5.95，5.832 kW·h/m³，respectively. The energy-saving benefits are significant，in order to provide reference and reference for the construction of similar projects，thereby promoting the healthy and sustainable development of the leachate treatment industry.

Key words: landfill leachate, energy-saving and efficiency-increasing, biological denitrification, non-membrane process

摘要：

垃圾渗滤液属于高浓度有机废水，水质水量季节性波动大，处理难度大。渗滤液处理行业经过数十年快速发展，取得了显著的成就，但是现有渗滤液处理工艺和设备选型过于追求满足基本产能和达标排放，而忽视了低能耗的要求，致使碳源投加量过大，能耗过高，专业化精细化运行管理有待加强。从优化选择生物脱氮工艺，改善生物池水流条件和鼓风曝气系统，注重混合液回流泵、鼓风机、曝气器、MBR超滤膜等关键设备选型，深度处理工艺在满足出水排放标准的前提下优先选用非膜工艺等方面探讨了渗滤液处理领域节能增效技术措施。通过生物脱氮新工艺的应用、生物池水流条件和混合液回流泵型的改变、鼓风曝气系统精准控制和内置式MBR的选用，系统分别节省电耗10.64、0.9、5.95、5.832 kW·h/m³，节能效益显著，可为同类项目的建设提供借鉴和参考，从而推动渗滤液处理行业健康可持续发展。

关键词: 垃圾渗滤液, 节能增效, 生物脱氮, 非膜工艺

CLC Number: 

• X703.1