WANG Xue-xin,BI Xue-jun,MA Chi-zhang,et al.Nitrogen Removal of Pilot-scale Three Stages A/O-MBBR with Two-step-feed[J].China Water & Wastewater,2021,37(17 17):62-68.
Nitrogen Removal of Pilot-scale Three Stages A/O-MBBR with Two-step-feed
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
17 17
Page:
62-68
Column:
Date of publication:
2021-09-01
- Keywords:
- three stages anoxic/aerobic; moving bed biofilm reactor(MBBR); step-feed; nitrogen removal
- Abstract:
- To achieve efficient biological nitrogen removal in urban sewage treatment processes, a pilot-scale three stages A/O-MBBR system with two-step-feed was built by making use of the advantages of the multistage anoxic/aerobic(A/O) with step-feed and moving bed biofilm reactor(MBBR). The removal performance of organics, ammonia nitrogen and total inorganic nitrogen(TIN) at medium-low temperature was investigated, and the removal capacity of major pollutants in each unit and its functional reactor was analyzed. When the reaction temperature, organic loading rate［calculated as dissolved organic matter (CODS)］and ammonia nitrogen loading rate were 12-15 ℃, (349.71±13.40) g/(m3·d) and (105.56±6.48) g/(m3·d), respectively, the removal efficiencies of CODS, NH4+-N and TIN in the system were (78.60±1.43)%, (99.51±0.41)% and (82.49±2.36)% by adding 60 mg/L carbon source (sodium acetate,calculated as CODS) in the post-annoxic tank, and the CODS, NH4+-N and TIN in the effluent were (20.97±1.51) mg/L, (0.15±0.13) mg/L and (6.24±0.57) mg/L, respectively. Therefore, the three stages A/O-MBBR system with two-step-feed had high removal efficiencies of organics and nitrogenous pollutants at medium-low temperature.
Last Update:
2021-09-01