【摘要】 为解决AnMBR（厌氧膜生物反应器）出水NH₄⁺脱除的问题,提出利用AnMBR出水中残余CODCr、溶解性CH4以及低价态硫元素,通过构建缺氧滤池和好氧滤池进行生物异养和硫自养脱氮的方法,进一步削减AnMBR出水CODCr、去除溶解性CH4、同时同步生物脱氮.结果表明:①缺氧滤池与好氧滤池经过120 d单独驯化与33 d串联驯化后,在HRT（hydraulic retention time,水力停留时间）为6 h、进水为实际AnMBR出水的工况条件下,出水ρ（TN）为17. 93 mg/L,去除率为52. 7%;出水ρ（NH₄⁺-N）为2. 78 mg/L,去除率为92. 3%,达到GB 18918—2002《城镇污水处理厂污染物排放标准》一级B标准.在HRT为8 h工况条件下,出水ρ（TN）为14. 60 mg/L,去除率为59. 0%;出水ρ（NH₄⁺-N）为2. 22 mg/L,去除率为93. 7%,达到GB 18918—2002一级A标准.②脱氮滤池中氮脱除路径主要包括残余CODCr异养反硝化、溶解性CH4异养反硝化和硫自养反硝化,并通过物料衡算评价了三者对于氮脱除的贡献,在HRT为6 h的工况条件下,脱氮滤池脱氮过程中残余CODCr异养反硝化、溶解性CH4异养反硝化和硫自养反硝化三者占比分别为54. 1%、24. 3%和21. 5%;在HRT为8 h的工况条件下,脱氮滤池脱氮过程中3种途径占比分别为70. 4%、13. 8%和15. 8%.研究显示,脱氮滤池可以实现对AnMBR出水的低耗生物脱氮以及整体水质的达标排放.更多还原

【Abstract】 A biological filter(anoxic filter combined with aerobic filter) was used for the removal of nitrogen in anaerobic membrane bioreactor(AnMBR) effluent. The anoxic and aerobic filter(A/O) were used for biological nitrogen removal using the residual CODCrin AnMBR effluent,dissolved methane and low-valence sulfur. The results demonstrated that after the anoxic filter and aerobic filter were separately acclimated for 120 d and then connected in series for further acclimation for 33 d using the real AnMBR effluent,the effluent TN of the biological filter was 17. 93 mg/L with 52. 7% removal rate at HRT = 6 h with AnMBR effluent being the influent,which met the municipal wastewater discharge level B standard(GB 18918-2002). The effluent NH4+-N of denitrification filter was 2. 78 mg/L with92. 3% removal. When HRT was set to 8 h,the effluent TN of the biological filter was 14. 60 mg/L with 59. 0% removal,which reached the municipal wastewater discharge GB 18918-2002 level A standard. Effluent NH4+-N of the biological filter was 2. 22 mg/L with 93. 7%removal. Meanwhile, nitrogen removal routes including residual CODCrheterotrophic denitrification, dissolved CH4 heterotrophic denitrification and sulfur autotrophic denitrification were discussed and the contribution of each route was calculated by mass balance analysis. It was found that the contribution of these three nitrogen removal routes were 54. 1%,24. 3% and 21. 5% respectively at HRT =6 h,and 70. 4%,13. 8% and 15. 8% respectively at HRT = 8 h. The results show that the anoxic and aerobic filter can remove the nitrogen in AnMBR effluent to meet the discharge standard with low consumption.更多还原