上流式厭氧污泥床裂解光電業TMAH廢水之研究

The study of upflow anaerobic sludge blanket to degrade The TMAH wastewater form photoelectric industry

孫瑞聰(Rui-Cong Sun)

指導教授 ： 陳賢焜

共同指導教授 ： 鄭幸雄(Sheng-Shung Cheng)

崑山科技大學/工程學院/環境工程研究所/碩士(2012年)

摘要

目前光電產業製程中大量使用氫氧化四甲基銨Tetra-Methyl Ammonium Hydroxide, TMAH作為顯影劑，其為腐蝕性且具急毒物質性，此一光電業顯影劑廢水特性，pH高達12~13，COD約在2,200~6,200 mg O/L，TKN約在1,000~1,800 mg N/L，Ammonium在5~10 mg N/L，TOC約3,300~4,200 mg C/L，廢水特性中TKN/COD比值0.2~0.5之間，遠大於一般活性污泥程序所需營養比值0.05，是屬於高氮工業廢水，而其分析COD/TOC比值0.6~0.7，遠低於其理論COD/TOC比值4.0，推論原因是其不容易被重鉻酸鉀所氧化，應以TOC代替COD來表示作為有機污染指標。
本研究利用上流式厭氧污泥床(UASB)處理光電廢水中含高濃度TMAH有機氮廢水，反應槽積65L，HRT約1天，溫度控制在37±0.1°C，pH值控制在7~7.5，ORP在-440~ -500 mV，反應槽中MLVSS 在10,000~15,000 mg/L， VLR約0.16~0.36 kg N/m3. d可轉化分解95%有機氮成為氨氮，產氣成份90%以上為甲烷，二氧化碳小於10%。經由生化甲烷產能試驗（BMP），顯示反應最佳pH約7.7 ，生長速率曲線接近monod eq.之飽和曲線，最高反應速率初始基質濃度約1,000 mg TMAH/L以上，而其最佳初始S0/X0約0.14 mg TMAH/mg VSS，此條件下可獲得最大比甲烷產氣速率 (0.015 mg CH4-C/mg VSS.d)。

關鍵字

氫氧化四甲基銨 ； TMAH ； 上流式厭氧污泥床 ； 有機氮裂解

並列摘要

Process of the optoelectronics industry,extensive use of tetramethylammonium hydroxide,ammonium the Tetra-Methyl Ammonium Hydroxide TMAH as a reagent, its corrosive possessed emergency toxic substances, a photoelectric industry the reagent wastewater characteristics, the pH as high as 12 to 13 COD of about 2,200 ~ 6,200 mg O/L, TKN about 1,000 ~ 1,800 mg N/L Ammonium in 5 of 10 mg N/L, the TOC of about 3,300 to 4,200 mg C/L, the wastewater characteristics TKN/COD ratio of 0.20.5 is much larger than the general activated sludge process required nutrient ratio of 0.05, are high nitrogen industrial wastewater, COD/TOC ratio of 0.6 to 0.7, much lower than the theory of COD/TOC ratio of 4.0, the inference becauseits not easy oxidation was potassium dichromate instead of COD to TOC as organic pollution indicators.
This study dealing with the photoelectric wastewater containing high concentrations of TMAH organic nitrogen wastewater using upflow anaerobic sludge blanket (UASB), the reaction trough trough plot 65 L, the HRT of about 1 day, the temperature was controlled at 37 ± 0.1 ° C , pH value controlled at 7~7.5, the ORP in the -440 to -500 mV of the reactor MLVSS 10,000 ~ 15,000 mg/L, the VLR is about 0.16 to 0.36 kg N/m3 d can be converted to decompose 95% of organic nitrogen as ammonia gas production more than 90% of the ingredientsmethane, carbon dioxide is less than 10%. Through the biochemical methane production test (BMP), the optimum reaction pH of about 7.7, the growth rate curve close to the Monod eq. Saturation curve, the maximum reaction rate of the initial substrate concentration of about 1,000 mg TMAH/L, and the best initial S0/X0 of about 0.14 mg TMAH/mg VSS, this condition is available under the specific methane gas production rate (0.015 mg CH4-C/mg VSS.d).

並列關鍵字

tetramethylammonium hydroxide ； TMAH ； upflow anaerobic sludge bed ； organic nitrogen decomposition

參考文獻

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