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):62-68.
两点进水三段A/O-MBBR生物脱氮中试研究
- Title:
- Nitrogen Removal of Pilot-scale Three Stages A/O-MBBR with Two-step-feed
- Keywords:
- three stages anoxic/aerobic; moving bed biofilm reactor(MBBR); step-feed; nitrogen removal
- 摘要:
- 针对城镇污水处理高效脱氮技术难题，利用分点进水多段A/O与MBBR两种技术的优势，构建了两点进水三段A/O-MBBR系统，考察了其在中低温条件下对有机物、NH4+-N、总无机氮（TIN）的去除效果，分析了各反应区段及其功能反应器对主要污染物的去除能力。结果表明，在温度为12~15 ℃、有机负荷为（349.71±13.40） g/（m3·d）［以溶解性COD(CODS)计］、NH4+-N负荷为（105.56±6.48） g/（m3·d）条件下，通过后置反硝化投加60 mg/L碳源（乙酸钠，以CODS计），两点进水三段A/O-MBBR系统对CODS、NH4+-N、TIN的去除率分别为（78.60±1.43）%、（99.51±0.41）%、（82.49±2.36）%，其出水浓度分别稳定在（20.97±1.51）、（0.15±0.13）、（6.24±0.57） mg/L，两点进水三段A/O-MBBR系统在中低温条件下可以实现对有机物与含氮污染物的高效去除。
- 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.
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