厭氧固定生物處理低強度污水：不同有機負荷及水力停留時間之影響

本研究利用在單一反應槽內設置固定厭氧生物平板，以克服厭氧生物工法在較短的水力停留時間處理污水之生物質量流失問題，厭氧固定生物反應槽 (AnIMMC) 以不同強度(COD 為200 ~ 700 mg/L) 和水力停留時間 (HRT：4 ~ 12 小時) 的合成污水進行試驗，COD去除率為81% ~ 96%，在HRT 為4 小時達到81% 的COD 去除率，COD 可由200 降至40 mg/L：在4 小時HRT，氣相CH_4 含量為39%，並產生0.05 L CH_4/g COD_(rem) 的氣相CH_4，相對於理論COD 轉化為CH_4 為34% 的產率 (氣相和溶解態CH_4)，而更高的COD 進流濃度將CH_4 產率提高到64%，顯示在短的接觸時間 (水力停留時間) 反應槽具有穩定處理低強度污水效能之可行性，厭氧固定生物反應槽最大的效益是可以節省傳統活性污泥法處理都市污水之龐大耗能。

關鍵字

厭氧反應槽；固定生物；低強度污水；甲烷生成；水力停留時間

並列摘要

The immobilized anaerobes in bio-plates were installed in a single-pass reactor to overcome the challenges on treating low-strength wastewaters. This bio-immobilization technique is to overcome the issue of biomass washing-out in anaerobic treatment unit during very low hydraulic retention time (HRT). The anaerobic immobilized mixed microbial cells (AnIMMC) reactor removed 81% ~ 96% of COD from a synthetic wastewater at varied strengths (COD of 200 ~ 700 mg/L) and hydraulic retention times (HRT: 4 ~ 12 h), achieving COD removal by 81% from 200 to 40 mg/L of COD at HRT of 4 h. At 4 h HRT, gaseous CH_4 content was 39% and gaseous CH_4 was produced at 0.05 L of CH_4/g of COD removed, corresponding to a 34% yield (gaseous and dissolved CH_4) relative to the theoretical COD-to-CH_4 conversion. Higher COD feeds increased CH_4 yield to 64%, indicating stable treatment performance of the reactor that promised viable treatment of low-strength wastewaters at a short contact time. This anaerobic immobilized mixed microbial cell provides huge energy saving in comparison to tradition activated sludge method in treating domestic wastewaters.

並列關鍵字

anaerobic bioreactor ； immobilized mixed microbial cell ； lowstrength wastewater ； methane yield ； hydraulic retention time

國際替代計量

厭氧固定生物處理低強度污水：不同有機負荷及水力停留時間之影響

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