基于低高径比UASB的硫自养反硝化工艺启动试验研究  

Study on Start-up for Sulfur-driven Autotrophic Denitrification Based on an UASB Reactor with Low Height-to-diameter Ratio

作　　者：张强 李静 麻倩 骆平 王治国 ZAHNG Qiang;LI Jing;MA Qian;WANG Zhi-guo(Beijing ENFI Environmental Protection Co.,Ltd.,Beijing 100038,China)

机构地区：[1]北京恩菲环保股份有限公司,北京100038

出　　处：《环境科学导刊》2025年第1期74-81,共8页Environmental Science Survey

摘　　要：以UASB反应器为研究对象,通过改变进水量、进水硝氮负荷、回流比等控制条件,考察泥法低高径硫自养反应器的启动时间。试验以市政污水厂的缺氧污泥为接种污泥,通过人工配置的硝态氮废水为试验用水,以S_(2)O_(3)^(2-)为电子供体,以硝态氮去除率和自养去除占比为控制指标。结果表明,水温在15.8~20.7℃,使用低高径比为10的UASB反应器进行硫自养驯化,在低进水NO_(3)^(-)-N污泥负荷(2±0.03 mg-N/g-VSS/h)、低进水流量(2 L/h)和超大回流量(1000%~2059%)参数运行下,可实现41 d成功启动。The sludge-based sulfur-driven autotrophic denitrification(SADN)process generally has the disadvantage of a long startup period,which to some extent affects application of this treatment technology.In this study,an UASB reactor is employed,the main objective is to investigate the start-up time of a sludge-based SADN reactor with low height-to-diameter rate by varying the control conditions such as flow rate,NO_(3)^(-)N loading,and reflux ratio.The UASB reactor is inoculated with anoxic sludge obtained from a municipal wastewater treatment plant as the seed sludge,using artificially formulated NO_(3)^(-)-N wastewater as the experimental water and S_(2)O_(3)^(2-)as the electron donors.The results show that when the water temperature is between 15.8 and 20.7°C,using an UASB with a low height-to-diameter of 10 can achieve successful start-up within 41 days under the parameters of a low NO_(3)^(-)-N loading(2±0.03 mg-N/g-VSS/h),a low flow rate(2 L/h),and an ultra-high reflux ratio(1000%~2059%).

关 键 词：高径比 UASB 硫自养反硝化(SADN) 启动 

分 类 号：X703[环境科学与工程—环境工程]