• 作者： 張添晉; 歐陽驕暉; 吳永成
• 作者服務機構： 國立中央大學土木工程學研究所; 美國國科會﹑紐澤西州危害性毒物研究中心
• 中文摘要： 本文利用兩相分離之系統，進行污泥厭氧消化之研究，酸相以懸浮生長方式操作，溫度控制在37°C，甲烷相則以固定生物膜法方式操作，溫度控制在50°C。根據實驗結果，酸相的水力停留時間為2天時，槽中之揮發酸濃度及揮發性固體物減少率分別為2200 mg/l及13%，且受投入濃度影響不大，當酸相之水力停留時間由2天縮短為1天時，消化氣體甲烷之含量由28％降至18％，但槽中之揮發酸濃度仍然相同。全系統之水力停留時問為10天時，以兩相分離之方式，其揮發性固體物減少率及消化氣體產量皆較傳統單段消化方式為高，由於反應槽體積減少及甲烷產量增加，故可用於平衡甲烷相高溫之能量消耗。
• 英文摘要： The phase separation of sludge digestion was investigated in this study using the suspended growthsystem for the acid-phase and the fixed-biofilm system for the methane-phase. Further, the thermophilictemperature of 50°C was used in the methane digester. In general, the volatile acid concentration and thereduction of volatile solids during the acid-phase averaged approximately 2,200 mg/1 as HAc and 13%,respectively, at hydraulic retention time of 2 days. These parameters were not significantly affected by theapplied solids concentration. The reduction of retention time from 2 to 1 day in the acid-phase reactorresulted in less methane content (28% versus 18%) in the digester gas, but produced the same amount ofvolatile acids. The volatile solids reduction and gas production at overall retention time of 10 days is con-siderably higher than that normally produced by the conventional single-stage anaerobic sludge digestionsystem. The significant saving in reactor volume and enhanced methane generation should offset the energyrequired for maintaining thermophilic temperature of methane-phase.
• 中文關鍵字： two-phase digestion; anaerobic sludge stabilization; mesophilic and thermophilic digestion
• 英文關鍵字： --