| 摘要: | 本研究利用連續與循序批式曝氣薄膜生物反應槽（Membrane Bioreactor，MBR）、（Sequencing Batch Membrane Bioreactor , SBMBR）處理化糞池出流水，固定污泥停留時間（Sludge retention time，SRT） 20天及水力停留時間（Hydraulic retention time，HRT）6小時之條件下，探討處理化糞池出流水之效率。
研究實驗分為三個階段，第一階段，污泥馴養，植入MBR槽污泥濃度為5000mg/L；第二階段，利用連續曝氣薄膜生物反應槽（Membrane Bioreactor，MBR），生物薄膜槽持續曝氣，HRT=6小時，SRT=20天；第三階段，利用循序批式反應槽（Sequencing Batch Membrane Bioreactor , SBMBR）。探討即時監測（pH、DO、Temp、ORP）、微生物的生長（MLSS、MLVSS）、碳（COD）、氮（TKN、NH4+-N、Org-N、NO2--N及NO3--N）之處理效應。
結果顯示，第一階段，經本系統處理後顯示，COD、TKN、有機氮、氨氮、總氮，其去除率分別為，84 %、99.6 %、99.9 %、91.6 %、47.98%，因系統在實驗開始時不穩定，所以造成系統厭氧，總氮去除率偏高，後加入沉浸式馬達，使污泥均勻混合，系統成純好氧，進入第二階段。第二階段，研究結果顯示，COD、TKN、有機氮、氨氮、總氮，其去除率分別為，88 %、99.5 %、99.9 %、95.2 %、9.8 %，在連續曝氣薄膜生物操作下，看出碳的去除率明顯增加，有機氮、氨氮有效的轉換率都有95 %以上。第三階段，研究結果顯示，COD、TKN、有機氮、氨氮、總氮，其去除率分別為，80 %、99.4 %、99.9 %、90.1 %、25.9 %，在循序批式曝氣薄膜生物操作下，在總氮的去除率比第二階段明顯提高，在氮的轉換率上也都有90 %以上。
In this case study, setup the system which the continuous running with aerobic tank (membrane bioreactor, MBR) and sequential batch membrane bioreactor (SBMBR) that for treating the septic tank wastewater operated by fixed the sludge retention time (SRT) about 20 days and 6 hrs. of Hydraulic retention time (HRT) for prove the efficiency of treated septic tank effluent.
This case study separated to 3 phases (1) the first phase; applied the sludge concentration in the aerobic tank (MBR tank) for 4,000 mg/L, (2) the second phase; setup condition with 6 hrs of hydraulic retention time (HRT) and fixed the sludge retention time (SRT) about 20 days and continuous running the system, (3) the third stage; running of sequencing batch membrane bioreactor (SBMBR) with feeding the influent water for 15 minutes, aeration for 90 minutes, mixing in MBR tank for 90 minutes, the water treated in MBR tank for 105 minutes and effluent for 60 minutes which means 1 batch running is 360 minutes and 6 hours for rerun the system, so one day can run for 4 batches.
For the parameters to prove the efficiency of treating the septic tank wastewater in this case study are pH, DO, Temperature, Oxidation-Reduction Potential (ORP), Microbial growth (MLSS, MLVSS), Carbon source (TCOD, SCOD), Nitrogen (TKN, Ammonia-Nitrogen, Organic-Nitrogen, Nitrite-Nitrogen and Nitrate-Nitrogen).
The results showed that the first stage, the removal efficiency of this system processed (COD, TKN, Organic Nitrogen (Org-N), Ammonia Nitrogen (NH4-N), Total Nitrogen (TN)) were 84%, 99.6%, 99.9% 91.6% and 47.98% respectively due to the starter of the system was unstable, also the anaerobic process in the system was high efficiency removal rate and after addition of immersive motor, sludge mixing due to the aeration aerobic system for the second stage. For this stage, COD, TKN, Organic Nitrogen (Org-N), Ammonia Nitrogen (NH4-N), Total Nitrogen (TN) were removal efficiency show 88%, 99.5%, 99.9%, 95.2% and 9.8% respectively, also the operation in MBR the results showed the COD removal efficiency is increased about 95%. The third stage, the removal efficiency of COD, TKN, Organic Nitrogen (Org-N), Ammonia Nitrogen (NH4-N), Total Nitrogen (TN) were shown 80%, 99.4%, 99.9%, 90.1% and 25.9% respectively which in the sequentially batch MBR removal efficiency is more efficient than the second stage about 90 %, that including the removal efficiency of the total nitrogen. |
