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Student Number 89326005
Author Wei-Liang Kuo(郭威良)
Author's Email Address No Public.
Statistics This thesis had been viewed 2705 times. Download 1322 times.
Department Graduate Institute of Environmental Engineering
Year 2001
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title The research of dynamic treatment characteristics of step-feeds system in removal nitrogen and phosphorus
Date of Defense 2002-05-31
Page Count 163
Keyword
  • BNR process
  • dynamic treatment
  • nitrogen and phosphrous removal
  • step-feeds
  • Abstract Activated Sludge Process and its modified methods had used very widely. The daily wastewater quality would vary with time or in different regions. Generally, the strategies treating the dynamic inflow in wastewater treatment plants were used to set up equilibrium basins, design by safe factors and long-term experiences as modified operations and control rules. However, these strategies were not efficient methods or increased the capital cost. Therefore, it is a test for the efficiencies and the optimal operations of BNR process(Biological Nutrient Removal Process) during the dynamic inflow. TNCU-3 process (Taiwan National Central University-3) is used in this research.
    It is controlled that SRT was 10 days, inflow quantity Q was 240ml/min, COD was 300mg/L, TN was 40mg/L, TP was 5mg/L and HRT was 9.5 hours in steady state. The six runs were operated at Q1:Q2:Q3 was 1:0:0:0, 0.9:0.1:0, 0:8:0.2:0, 0.7:0.3:0, 0.8:0.1:0.1 and 0.7:0.2:0.1 and the return sludge rate Qr was 0.5Q. The effluent SCOD was less than 20mg/L and the removal efficiency more than 94%. The effluent phosphate and phosphorus weren’t detected. The suspended solid was about 6 to 14 mg/L. The removal efficiency of total nitrogen was about 69.2% to 76.4%. All of the nutrient removal efficiencies in TNCU-3 were higher than other BNR processes.
    It is controlled that SRT was 14.6 days, inflow quantity Q was 80 to 240ml/min, COD was 100 to 300mg/L, TN was 25 to 40mg/L, TP was 3~5mg/L and HRT was about 9.5 to 14 hours in dynamic operations. 6 step-feed runs were separated to Qr:Q was 0.5 and 0.25. In summary 12 runs operated and monitored the treatment qualities by computer. The computer monitoring results as followings: ORP was -50 to 370 mV in anaerobic zone, pH was 6.3 to 6.9 anaerobic zone, DO was 1.5 to 4(mg/L)in aerobic-1 zone、effluent COD was 4 to 15(mg/L), effluent nitrate was 5 to 14(mg/L), effluent pH was 7 to 7.5 effluent SS was 2 to 10(mg/L) and the return suspended solids was 2800 to 6800(mg/L)。
    In 24 hours batch experiments the total F/M of the process was 0.15 to 0.18. Average MLSS was about 1,600 to 2,000mg/L and less than steady-state. It was influenced by F/M in anaerobic zone. When the F/M was high in anaerobic zone the average MLSS would be high in whole process. MLSS was diluted 200 to 400 mg/L and was obviously in two step-feed. Effluent COD in each run was about 4 to 12 mg/L and its removal efficiency was higher than 93%. This result was similar to steady-state. Effluent nitrate was 5 to 11 mg/L and its removal efficiency was 65 to 84%. It was found when the C/N was high in anoxic zone then the remaining nitrate in aerobic zone would be low if the control volume was anoxic zone and aerobic zone. When the C/N was controlled between 4 to 8 in 1st anoxic zone the remaining nitrate would be between 5 to 8 mg/L in 3rd aerobic zone. When the C/N was controlled between 3 to 5 in first 2nd anoxic zone the remaining nitrate would be between 5 to 7 mg/L in 4th aerobic zone. The removal efficiency of phosphorus is obviously less than steady-state. Effluent phosphate was about 0.03 to 0.7 mg/L in dynamic operation and its removal efficiency is between 68.2 to 98.7%. The optimal efficiency of nutrient removal was run-0.7:0.2:0.1 in the research.
    Table of Content 誌謝
    摘要Ⅰ
    英文摘要Ⅲ
    目錄Ⅴ
    圖目錄Ⅶ
    表目錄Ⅹ
    第一章 前言1
     1.1 研究緣起1
     1.2 研究目的與內容2
    第二章 文獻回顧4
     2.1 活性污泥法BNR程序之沿革與發展4
     2.2 活性污泥法BNR程序之機制原理10
      2.2.1 氮的代謝11
      2.2.2 氮的硝化作用12
      2.2.3 氮的脫硝作用13
      2.2.4 磷的代謝14
     2.3 動態操作監測項目與擾動因子17
      2.3.1 BNR程序自動化監測項目17
      2.3.2 BNR程序自動化控制項目18
    2.4 活性污泥法BNR程序動態操作與監控發展25
    第三章 實驗設備與方法29
     3.1 實驗模廠設備29
    3.2 實驗自動監控設備32
    3.2.1 自動監測設備33
     3.3 實驗基質39
     3.4 實驗計畫41
      3.4.1 實驗架構41
      3.4.2 實驗試程43
     3.5 實驗分析方法與設備44
      3.5.1 分析方法44
      3.5.2 分析設備45
    第 四 章 實驗結果與討論46
    4.1 穩態操作各試程水質特性46
     4.2 動態操作各試程水質特性48
     4.2.1 不分流操作 1:0:0系列(Run-1及Run-2)49
     4.2.2 不分流動態操作處理特性59
     4.3 兩段分流操作62
      4.3.1 0.9:0.1:0系列(Run-3及Run-4)62
      4.3.2 0.8:0.2:0系列(Run-5及Run-6)73
      4.3.3 0.7:0.3:0系列(Run-7及Run-8)83
      4.3.4 兩段分流動態操作處理特性95
     4.4 三段分流操作96
    4.4.1 0.8:0.1:0.1系列(Run-9及Run-10)96
      4.4.2 0.7:0.2:0.1系列(Run-11及Run-12)107
    4.4.3 三段分流動態操作處理特性117
     4.5 電腦監測資料119
      4.5.1 不分流操作電腦監測資料119
      4.5.2 兩段分流操作電腦監測資料120
      4.5.3 三段分流操作電腦監測資料122
     4.6 綜合討論125
      4.6.1 不同試程處理特性125
      4.6.2 監控指標參數130
    第五章 結論與建議132
    5.1 結論132
    5.2 建議133
    參考文獻136
    附錄141
    附錄一 各試程好氧槽DO濃度變化142
    附錄二 各試程反應槽平均COD濃度變化圖145
    附錄三 各試程厭氧段氨氮濃度變化圖148
    附錄四 各試程缺氧槽C/N變化圖150
    附錄五 LAB VIEW圖控軟體介面154
    附錄六 電腦監測資料155
    附錄七 各反應槽平均MLSS變化圖161
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  • Chaio-Fuei Ouyang(歐陽嶠暉)
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    Date of Submission 2002-06-18

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