N-甲基吡咯烷酮(N-methyl-pyrrolidone, NMP)為半導體產業中常用到之光阻剝離劑。近年隨著使用量逐漸增加，若不謹慎處理即排放至自然水體可能危害生態環境與人類健康，成為重要的環境課題。
本研究目的主要係瞭解實廠生物處理系統各單元的效能，並藉由批次實驗與實驗室規模反應槽評估各生物程序處理含NMP廢水的可行性。結果顯示，好氧單元的硝化作用容易受到有機物抑制，當初始NMP濃度高於1000 mg/L時，硝化作用便受到明顯抑制；在缺氧環境下，作為碳源的NMP在高濃度時會造成基質抑制，但是該廠活性污泥可經過馴養後適應，在初始NMP濃度為2000 mg/L時COD與NMP之最大比降解速率分別能達到27.0 g /g VSS-h及 18.2 g /g VSS-h。經過模式模擬評估該廠生物處理系統後，可發現硝化速率慢、有機負荷低以及磷酸鹽的缺少。經建議後該廠提高食微比(F/M)與額外添加磷酸鹽，其生物處理系統整體處理量提高約20%，並且進一步提高總氮的去除。
而針對含NMP廢水的厭氧降解，實驗室厭氧反應器在249 mg COD/L/d的有機負荷下，可降解含NMP之廢水並有96%以上的COD、NMP去除率；批次實驗的結果亦指出厭氧微生物能夠利用NMP作為唯一碳源產生甲烷與少量二氧化碳，甲烷產率最高可達0.47 L CH4/g COD，顯示未來應用於實廠的可能性。
關鍵字：NMP、含氮有機物、生物處理、厭氧反應器

The removal of nitrogenous compounds (e.g., n-methyl-pyrrolidone, NMP) in semiconductor wastewater is getting more concern. The purposes of this study are to investigate the COD removal and nitrogen removal of NMP-containing wastewater in a full-scale wastewater treatment plant and to evaluate the feasibilities for treating NMP-containing wastewater under aerobic, anoxic and anaerobic conditions, respectively.
Batch results indicate that nitrification was completely inhibited when initial NMP concentration was higher than 1000 mg/L. In anoxic condition, denitrification works after acclimation but was limited at high NMP concentration due to substrate inhibition, where maximum specific degradation rate of COD and NMP could achieve 27.0 g/g VSS-h and 18.2 g/g VSS-h, respectively, with initial NMP concentration of 2000 mg/L. Meanwhile, the organic loading capacity and nitrogen removal were improved in full-scale wastewater treatment plant when increasing Food-to-Microorganism Ratio (F/M) and spiking additional phosphate.
The results of lab-scale anaerobic reactor show that the anaerobic reactor can degrade NMP-containing wastewater with 96% of removal both on COD and NMP under 249 mg COD/L/d of organic loading capacity. In this study, we also conducted anaerobic batch experiments using NMP as the only carbon source to evaluate the degradability and the biochemical methane potential of NMP in anaerobic condition.
Keyword: NMP, nitrogenous organic compounds, biological treatment, anaerobic reactor

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