LIANJie,ZHUOYang,YANGPei-zhen,et al.Start-up of UASB for Treating Thermal Hydrolyzed Filtrate of Excess Sludge with High Solid Content[J].China Water & Wastewater,2023,39(5):114-120.
Start-up of UASB for Treating Thermal Hydrolyzed Filtrate of Excess Sludge with High Solid Content
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第5期
Page:
114-120
Column:
Date of publication:
2023-03-01
- Keywords:
- UASB; exces sludge with high solid content; thermal hydrolyzed filtrate; organic loading rate
- Abstract:
- 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 (2 532.37±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.
Last Update:
2023-03-01