HUANG Zi-hong,XIANG Ting,FANG Hua,et al.Operational Condition Optimization and Mathematical Simulation of Biological Denitrification in Step-feed SBR Process[J].China Water & Wastewater,2020,36(23 23):89-93.
Operational Condition Optimization and Mathematical Simulation of Biological Denitrification in Step-feed SBR Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
23 23
Page:
89-93
Column:
Date of publication:
2020-12-01
- Keywords:
- SBR; step-feed; biological denitrification; operational condition optimization; mathematical simulation
- Abstract:
- Biological denitrification efficiency and process optimization of step-feed SBR process treating low carbon nitrogen ratio sewage were explored by combining lab-scale bioreactor experiments and mathematical simulation. Due to process limitation, the total nitrogen removal efficiency of conventional SBR was low. Step-feed SBR process could remove COD and NH4+-N efficiently, and the removal efficiency of total nitrogen was higher than that of the traditional SBR process, but lower than the theoretical removal value. The biological denitrification process could be properly simulated through the established mathematical model based on STOAT software. Optimized operational conditions were determined by using mathematical simulated orthogonal experiments, which were as follows: HRT of 9 hours, flow distribution ratio of 5 ∶3 ∶2 and anoxic and oxic operational time ratio of 3 ∶2.
Last Update:
2020-12-01