Estimation of Chlorinated Aliphatics Critical Loading Rates for Anaerobic Wastewater Treatments

厭氧廢水處理氯化脂肪族化合物臨界負載率之估計

邱應志(Ying-Chih Chiu) ； Richard E. Speece

《國立宜蘭大學工程學刊》 8期 (2012/12) Pp. 61-77

https://doi.org/10.6176/BCE.2012.08.15

摘要

在生物轉化工業廢水之優先管制污染物過程中，厭氧反應器具備有相當的應用潛力。經過適當的馴化後，氯化脂肪族化合物可與乙酸或丙酸以顯著的速率同時被分解轉化。依據宿命模式推估顯示，在乙酸或丙酸的反應器中，生物轉化在移除氯化脂肪族化合物上為主要機制，佔了移除率的67%至99%；而揮發則為次要機制，可貢獻0.2%至33%的移除率。特定氯化脂肪族化合物之臨界負載率，定義為主要基質利用率因受氯化脂肪族化合物影響而降為原值50%時之負載率。代謝丙酸時，氯化脂肪族化合物之臨界負載率介於0.4與24 mg/g cell-day；而代謝乙酸時，此臨界負載率介於0.1與21 mg/g cell-day。而氯化脂肪族烯烴類比氯化鏈烷烴類可以較快的速率被厭氧微生物轉化。若不超過此臨界負載率，厭氧處理程序可以穩定地同時將主要基質伴同氯化脂肪族化合物一起生物轉化。

關鍵字

氯化脂肪族化合物 ； 甲烷菌 ； 揮發有機性化合物 ； 可處理性

並列摘要

Anaerobic reactors have considerable potential of biotransforming priority pollutantsfrom industrial wastewaters. With proper acclimation, selected chlorinated aliphatics were transformed simultaneously with acetic acid or propionic acid at significant rates. Based on fate model estimation. Biotransformation, accounted for from 67% to 99% of the total removal, was the major mechanism of chlorinated aliphatics removal; while volatilization, ranged from 0.2% to 33% of removal, was the secondary one for reactors supplied with either HPr or HAc. The critical loading rate was defined as the loading rate of a specific chlorinated aliphatic which resulted in reduction of the primary substrate utilization to 50%. The chlorinated aliphatics critical loading rates for the microbes metabolizing HPr were from 0.4 to 24 mg/g cell-day, while those rates for the microbes metabolizing HAc ranged from 0.1 to 21 mg/g cell-day. On the other hand, anaerobic microorganisms biotransformed chlorinated aliphatic alkenes at a higher rate than those of alkanes. Under the critical loading, an anaerobic wastewater treatment process could stably and simultaneously biotransform primary substrate along with chlorinated aliphatics.

並列關鍵字

Chlorinated aliphatics ； Methanogen ； VOCs ； Treatability