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