應用固定化細胞於豬糞尿水之厭氧消化

Applying the Immobilized Cells in Anaerobic Digestion of Swine Wastewater

劉安琪(An-Chi Liu) ； 周楚洋(Chu-Yang Chou)

《農業機械學刊》 19卷2期 (2010/06) Pp. 33-46

https://doi.org/10.30062/JAM.201006.0002

摘要

本研究以纖維醋酸三酯（cellulose triacetate）為固定化材質，包覆厭氧污泥製成固定化細胞（immobilized cells），以做為處理豬糞尿水之上流式流體化床（up-flow fluidized bed）的介質，同時評估其氮、磷之去除效率。操作過程中，厭氧槽溫度控制在攝氏37±1°C，進流COD濃度皆維持在7,500 mg/L，以水力停留時間（HRT）20天起動，然後漸漸增加進流的有機負荷量，實驗共分為7個試程，由0.33逐漸升高至7.5 g COD/L/d，期間觀察產氣量、有機物、氮化物及磷化物的變化情形。結果顯示BOD、COD、總有機氮（TKN）、總氮化物（TN，為TKN，NO3（上標 -）-N及NO2（上標 -）-N之總和）及正磷酸鹽（PO4（上標 -3）-P）之平均去除率分別為64-84%、62-82%、6-48%、6-47%及0.4-28%；另觀察產氣部份發現，實驗全程產氣中甲烷（methane，CH4）的百分比皆高於70%，甲烷產率（methane production rate，MPR）亦可達0.09-0.90 L CH4/L/day。與其他研究比較，本實驗在最適情況下，甲烷在產氣中的百分率及甲烷產率高於其他試驗之處理結果，且對有機物（COD）的去除率亦可達80%以上，因此應用本系統於豬糞尿水的處理相當可行。

關鍵字

固定化細胞 ； 生物膜 ； 豬糞尿水 ； 氮磷處理 ； 厭氧消化

並列摘要

Immobilized cells produced by entrapping anaerobic sludge with cellulose triacetate, were used in this study as the media of packed-bed reactor. The objective of this study is to investigate the feasibility of using these immobilized cells in the treatment of concentrated swine wastewater. A modified up-flow fluidized anaerobic system was installed and operated at 37±1 °C. The system was started up with the loading of 0.25 g COD/L/d and stood for the 20-day hydraulic retention time (HRT). Influent was maintained at a constant concentration of 7.5 g COD/L. With the increasing of the organic loading rate (OLR), totally 7 experiments were conducted. They were 0.33, 0.625, 0.75, 1, 1.5, 2.5 and 7.5 g COD/L/d. Gas production, organic components and nutrients (N, P) were monitored during experiments. In organic component and nutrient parts, the average removal efficiencies of BOD, COD, TKN, TN (the total concentrations of TKN, NO3(superscript -)-N and NO2(superscript -)-N) and PO4(superscript -3)-P ranged between 64-84%, 62-82%, 6-48%, 6-47% and 0.4-28%, respectively. In aspects of gas production, the methane content of the biogas produced was higher than 70% during experiment, and methane production rate (MPR) of 0.09-0.90 L CH4/L/day was achieved. In comparison with other researches, the methane content and MPR were higher than their tested results. Therefore, it is feasible to apply this system for swine wastewater treatment.

並列關鍵字

Immobilized cells ； Biofilm ； Swine wastewater ； Nutrients removal ； Anaerobic digestion