摘要
针对高含固剩余污泥热水解滤液采用UASB处理的启动特性,开展连续运行试验(HRT为26~7.8 d)并分析启动过程中有机物去除率、甲烷产量的变化。结果表明,COD去除率及甲烷产率随着有机负荷的提升而增加,当HRT为7.8 d时COD去除率可达(65.92±2.44)%。相比于COD去除率,系统启动过程中更应关注甲烷产量的变化。当HRT为7.8 d时,出水氨氮浓度及pH分别为(2532.37±129.93)mg/L、8.02±0.28。负荷提升过程中,应更注重氨抑制风险。由于沼气产量及进水量较低,系统启动初期可采用间歇进水并增设内回流的方式增加UASB内的上升流速。
To investigate the start‑up characteristics of UASB for treating thermal hydrolyzed filtrate of excess sludge with high solid content,a continuous running test(HRT ranging from 26 days to 7.8 days)was carried out and the changes of organic matter removal rate and methane yield during the start‑up process were analyzed.The COD removal rate and methane yield rate increased with the organic loading rate.When the HRT was 7.8 days,the COD removal rate reached(65.92±2.44)%.Compared with COD removal rate,more attention should be paid to the change of methane yield during system start‑up.When the HRT was 7.8 days,the effluent ammonia nitrogen and pH were(2532.37±129.93)mg/L and 8.02±0.28,respectively.In the process of load increase,more attention should be paid to the risk of ammonia inhibition.Due to the low biogas yield and influent volume,intermittent feeding and internal reflux can be adopted to increase the up‑flow velocity in UASB at the initial start‑up stage.
作者
连洁
卓杨
杨培真
田国兴
齐泽宁
韩芸
LIAN Jie;ZHUO Yang;YANG Pei‑zhen;TIAN Guo‑xing;QI Ze‑ning;HAN Yun(School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Xi’an Engineering Investigation&Design Research Institute of China National Nonferrous Metals Industry Co.Ltd.,Xi’an 710043,China;Xi’an Abstract Yiwei Putai Environmental Protection Co.Ltd.,Xi’an 710077,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2023年第5期114-120,共7页
China Water & Wastewater
基金
国家自然科学基金资助面上项目(52070153)
陕西省重点研发计划一般项目(2020SF-357)。
关键词
UASB
高含固剩余污泥
热水解滤液
有机负荷
UASB
sludge with high solid content
exces thermal hydrolyzed filtrate
organic loading rate
