• 作者： 陳秋楊
• 作者服務機構： 國立中興大學環境工程學系
• 中文摘要： 本研究之主要目的乃為探討完全混合懸浮生長系統利用單一巧泥脫氮之效果，首先於實驗室模型進行連續操作，以污泥齡與迥流比為控制因子，當操作達定常狀態時，分析脫硝槽與好氧性反應槽內各類基質濃度的變化，推演反應動力模式關係，作為預測處理效果及設計處理工程之用，並討論此一系統之最佳操作條件，以供進一步經濟評估之參考。 由實驗結果，當進流水化學需氧量為550mg/l，氨氮為30mg/l，若脫硝槽水力停留時間為二小時，好氧性反應槽為六小時，污泥齡為十五天，迴流比為300%時，處理後水質化學需氧量為14mg/l，氨氮為1.0mg/l。於本試驗流程，化學需氧量之去除與硝化作用為零階反應關係，脫硝作用則為一階反應關係，污泥齡對化學需氧量去除之影響極為顯著，而對硝化作用與脫硝作用之影響較微。系統內生物污泥之增殖主要為脫硝作用之結果，其增殖係數隨污泥齡之增加而減少。
• 英文摘要： The major objective of this study was to investigate the removal of organics (as COD) and nutrients(as N) from wastewater by a complete-mix suspended growth system. In a lab-scale continuous flow system,mean cell residence time (SRT) and recycle flow rate (or recycle ratio) were selected as operating para-meters. After steady state was established, concentrations of substrate and biomass both in the anoxicreactor (denitrification) and aerobic reactor (nitrification and organic removal) were analyzed under variousconditions. The kinetic models of biochemical reactions in the system were derived and taken into accountfor the engineering design purposes. The optimized operating conditions from the study were also evaluatedfor further economic analysis. At the conditions with influent COD of 550 mg/l, influent (方程式無法摘錄) of 30 mg/l, hydraulic detentiontimes of 2 hrs and 6 hrs in the anoxic reactor and aerobic reactor, respectively, and recycle ratio of 300%,an effluent quality with COD of 14 mg/l and (方程式無法摘錄) of 1.0 mg/l can be obtained. The COD removal andnitrification follow zero order kinetics while the denitrification is first order. It is realized that SRT levelmaintained in the system has a significant effect on the COD removal rate but the effect on the nitrogenremoval is minimal. Biomass yield in the system is mainly associated with the denitrification, and the yieldcoefficient decreases with increasing SRT.
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