國內合成皮、樹脂、油漆、電子等事業每年排放大量含甲苯、二甲苯、二氯甲烷等含低濃度揮發性有機物物(VOC)之排氣，亟需防治。生物法(生物濾床法、生物滴濾塔法、生物洗滌法)適合處理含中低濃度(<1000 mg C/m3)揮發性有機物之廢氣，其相對處理費用較其他方法為低，頗值推廣應用。
為探討以活性污泥曝氣池洗滌法各種操作參數對甲苯、二甲苯及二氯甲烷去除率和污泥沉降性的影響，本研究以一3 m深、0.4 m×0.4 m斷面積的活性污泥池，在四個不同的液位高度(0.50、1.10、1.75、2.25 m)下，分別通入含250-1000 ppm (濃度以甲烷計)之三種VOC的空氣，以探討各參數對各VOC去除率的影響。
結果顯示，在曝氣強度3.75-11.25 m3/m2.h、pH值6-8、污泥濃度(MLSS) 1600-2800 mg/L、液位高度1.10 m之操作條件下：甲苯體積負荷L = 0.26 -14.7 g/m3.h時，系統對其去除能力為K = 0.25-6.6 (?) g/m3.h，去除率h = 93.1%。在類似操作條件下，處理二甲苯之K = 0.2-10.0 g/m3.h、L = 0.30 - 13.9 g/m3.h、h = 93.9%；處理二氯甲烷之L = 0.16 - 4.97 g/m3.h 、K = 0.15-2.27 g/m3.h、h = 98.8%。污泥沉降性良好(SVI30＝72-120 mL/L.g)。

Biological processes have been proven to be economical and effective for control of volatile organic compounds (VOCs) with concentration of <1,000 mg C/m3 and VOCs such as toluene, xylenes, and dichloromethane(DCM) have been shown to be biodegradable. An activated sludge tank can be used as a bioscrubber for the purpose. Into the tank, an air stream is introduced through the spargers originally for aeration. Water-soluble contaminants in the air stream are absorbed into the mixed liquid and, subsequently, degraded by the microorganisms in the aeration tank.
In this study, a pilot-scale activated-sludge tank (0.4 m×0.4 m in cross-sectional area and 3 m in water depth) was used as a bioscrubber to study the treatability of gas-borne toluene, xylenes, and DCM. Synthetic gases with the three VOCs with concentrations in the rang of 250-1000 ppm (measured as methane) were used as the test gases. Effects of volumetric aeration rate (Q/V), influent VOC concentration, and submerged liquid depth on the removal efficiency of the influent VOCs were tested.
Results show that with Q/V = 3.75-11.25 m3/m2.h, pH = 6-8, MLSS (mixed liquor suspended soilds concentration) = 1600-2800 mg/L, and submerged liquid depth D = 1.1 m, removal efficiencies were 93.1, 93.9, and 98.8%, respectively, for toluene, xylenes, and DCM. The removal efficiencies were nearly independent of the operating conditions.

第一章 前言 1
1.1研究背景及動機 1
1.2研究方法及目的 2
第二章 文獻回顧 8
2.1生物處理法 8
2.1.1生物濾床法 10
2.1.2生物滴濾塔法 11
2.1.3生物洗滌法 14
2.2生物洗滌塔排氣處理之相關文獻 20
第三章 實驗設備與方法 27
3.1實驗設備 27
3.1.1設備組成 27
3.2實驗材料 31
3.2.1植種污泥 31
3.2.2藥品名稱：試驗使用藥品，如表3-3所示。 31
3.3實驗方法 32
3.3.1植種活性污泥每日之換水量 32
3.3.2微生物馴養 32
3.3.3實驗項目 32
3.3.4分析方法 33
第四章 結果與討論 35
4.1甲苯之實驗結果 35
4.1.1 pH值、MLSS值與SVI30 35
4.1.2曝氣量與去除率之關係 35
4.1.3甲苯體積負荷與體積分解能力之關係 38
4.1.4不同液面高度與進氣濃度之去除關係 40
4.2二甲苯之實驗結果 44
4.2.1 pH值、MLSS值與SVI30 44
4.2.2曝氣量與去除率之關係 44
4.2.4二甲苯體積負荷與體積分解能力之關係 48
4.2.4不同液面高度與進氣濃度之去除關係 49
4.3二氯甲烷之實驗結果 54
4.3.1 pH值、MLSS值與SVI30 54
4.3.2曝氣量與去除率之關係 55
4.3.2二氯甲烷體積負荷與體積分解能力之關係 57
4.3.4不同液面高度與進氣濃度之去除關係 58
4.3.5水中氯離子濃度與pH值之關係 62
4.4氣相污染物在活性污泥混合液中之「氣-液」質傳 65
4.4.1甲苯之吸收 67
4.4.2二甲苯之吸收 69
4.4.3二氯甲烷之吸收 71
第五章 結論與建議 76
5.1結論 76
5.1.1甲苯 76
5.1.2二甲苯 77
5.1.3二氯甲烷 78
5.2建議 79
附錄-1 分析儀器與型號 83
附錄-2 實驗數據 84

參考文獻
1.行政院環保署，“有害空氣污染物排放管制規範研定計劃”EPA-82-F103-09-13，中華民國八十三年。
2.Den, W., M. Pirbazari, C. C. Huang, and K. P. Shen, (1998) “Technology Review for Vapor Phase Biofiltration Part I：Technology Development and Applications”,Joural of Chinese Institute of Environmental Engineering,Vol. 8, No. 3, pp. 159-179
3.行政院勞工安全委員會勞工安全衛生研究所「物質安全資料表」，
http://192.192.46.66/DATABASE.HTM
4.環保署(1999)，「揮發性有機廢氣生物處理技術手冊」，行政院環保署，民國八十九年十二月。
5.Edwards,F. G. and Nirmalakhandan, N. (1999): J. Environ. Engrg., November, 1062-1070.
6.Nishimura, S. and Yoda, M. (1997): Removal of hydrogen sulfide from an anaerobic biogas using a bio-scrubber, Wat. Sci. Technol., 36 (6-7), 349-356.
7.Hammervold R. E., Overcamp, T. J., Grady, C. P. L. Jr., and Smets, B. F. (2000): A sorptive slurry bioscrubber for the control of acetone, J. Air & Waste Manage. Assoc., 50, 954-960.
8.Wubker, S. -M. and Friedrich, C. G. (1996): Reduction of biomass in a bioscrubber for waste gas treatment by limited supply of phosphate and potassium ions, Appl. Microbiol. Biotechnol., 46, 475-480.
9.Wubker, S. -M., Laurenzis, A., Werner, U., and Friedrich, C. (1997), Controlled biomass formation and kinetics of toluene degradation in a bioscrubber and in a reactor with a periodically moved trickle-bed, Biotechnol. Bioeng., 55(4), 686-692.
10.DeHollander G. R., Overcamp, T. J., Grady, Jr., C. P. L. (1998): Performance of suspended-growth bioscrubber for the control of methanol, J. Air & Waste Manage. Assoc., 48, 872-876.
11.Croonenberghs, J. and Varani, F. (1994): Use of bioscrubber to control ethanol emissions, Proc. 87th Annual Meeting & Exhibition, Air & Waste Manage. Assoc., Cincinnati, Ohio, June 19-24.
12.黃世傑、吳奕禎(1998)：應用氣舉式生物反應器處理含甲苯、丙酮廢氣之研究，第十五屆空氣污染控制技術研討會論文集，pp.380-386，中華民國環境工程學會。
13.周明顯、莊政道(1998)：以活性污泥吸收氧化法處理排氣中揮發性有機物之理論解析及驗證，第十五屆空氣污染控制技術研討會論文集，pp.387-392，中華民國環境工程學會。
14.周明顯、程建源(2000)：以活性污泥吸收氧化法處理排氣中揮發性有機物之理論解析及驗證，第十五屆空氣污染控制技術研討會論文集，pp.387-392，中華民國環境工程學會。
15.邱創汎、張鴻均、張坦卿、鄭鴻鉸：有機廢氣生物處理可行性評估方法建立，第十二屆空氣污染控制技術研討會論文集，中華民國八十四年十一月。
16.朱振華、盧重興、林明瑞(1998)：操作溫度對生物濾床處理含BTEX廢氣之研究，第十五屆空氣污染控制技術研討會論文集，pp.414-420，中華民國環境工程學會
17.Chou, M. S. and Wu, F. L. (1999): Treatment of Toluene in Air Stream by A Biotrickling Filter Packed with Slags, J. Air and Waste Manage. Asso.,49, 386-398.
18.Devinny, J. S., Deshusses, M. A., and Webster, T. S. (1999): Biofiltration for Air Pollution Control, Lewis Publishers, USA, 1999.
19.Wu, B. G., Lerous, C. A,and Brzezinski, R.(1999): A High Performance Biofilter for VOC Emission Control, J. Air and Waste Manage. Asso. ,49, 185-192.
20.Don, J. A., Feenstra, L., “Odour Abatement through Biofiltration,” Lecture given in Louvain-La Neuve (Belgium) in April 1984 at Symposium on Characterization and Control of Odoriferious Pollutants in Process Industries, 1984.
21.Groenestijn, J. W. and Hesselink, P. G. M., “Biotechniques for Air Pollution Control,” Biodegradation , 4:283-301, 1993.
22.Ottengraf, S. P. P. (1986). “Exhaust gas purification,” In Biotechnology; Rehm, H.J.; Reed, G., Eds.; VCH Verlagsgesellsch: Weinheim, 1986, Vol. 8, pp. 425-452.
23.Hsieh, C. C., Babcock Jr., R. W., and Stenstrom, M. K. (1993). “Estimating emissions of 20 VOCs. II: Diffusion aeration,” J. Envir. Engng., ASCE, 119 (6), 1099-1118.
24.Hsieh, C. C., Ro, K. S., and Stenstrom, M. K. (1993). “Estimating emissions of 20 VOCs. I: Surface aeration,” J. Envir. Engng., ASCE, 119 (6), 1077-1098.
25.Perry, R. H. and Green, D. (1984). Perry’s Chemical Engineers’ Handbook, 6th Ed., McGraw-Hill International Ed. p. 3-103.
26.Ziminski, R. W., and Yavorsky, J. (1994) Control of Hazardous Air Pollutant Using a Commercial Biofilter, A＆WMA, Proc. 87th Annual Meeting ＆Exhibition, WA74A. 02, 1994
27.王嘉禧(2000)，「以生物滴濾塔處理排氣中氨之操作性能研究」，國立中山大學環境工程研究所碩士論文，民國八十九年六月。
28.張家豪(1999)，「纖維床生物反應器處理甲苯氣體污染物之研究」，國立中央大學環境工程研究所碩士論文，民國八十八年六月。