Revised Modeling for Removal of H2S-Laden Contaminants by Biofilter

使用動力修正模式預測生物降解擴散能力－以利用固定式生物濾料處理含硫化氫廢氣為例

張章堂(Chang-Tang Chang) ； 陳博彥(Bor-Yann Chen)

《Journal of the Chinese Institute of Chemical Engineers》 36卷4期 (2005/07) Pp. 339-348

https://doi.org/10.6967/JCICE.200507.0339

摘要

本研究目的為利用固定式生物濾料在好氧環境下代謝含硫化氫廢氣，並探討其動力模式之預測能力及研求動力參數與擴散係數。因生物處理系統在非穩定進流負荷下之處理效率及其穩態下系統動力行為之研究較為欠缺，尤其針對含硫化氫廢氣之處理。並由相關研究得知較不易預測低流量（停留時間較長或負荷較小）時之生物降解能力，常易導致預測結果偏高。本研究乃使用含擴散項之H-D動力修正模式，並使用最小平方差數值分析，以預測氣液固三相下污染物之質傳係數及生物降解常數所結合的動力參數k值與擴散係數，並與實驗結果進行比對。研究結果得知，所使用修正模式預測結果頗佳，尤其針對低濃度時之生物降解；另由本研究亦可得知所求得之動力參數與擴散係數分別為0.018s^(-1)與0.78平方公分/s，皆與相關文獻頗為接近。

並列摘要

The study presents a modified mass transfer model for predicting the kinetic parameters and diffusivity coefficient of biofiltration using entrapped mixed microbial cells (EMMC) for industrial applications. This revised model describes fundamental mass transport processes among the air and solids/water phases, biodegradation of the substrate, CO2 production, and accumulation. Governing equations of the model are also verified by means of simplified examples with analytical solutions. Experimental data are also used to compare model predictions and experimental results in steady-state regimes. The kinetic constant 0.018s^(-1) and diffusivity coefficient 0.78cm^2/s evaluated based on our revised model are found to be fairly close to previously reported values (ca. 0.02-0.05s^(-1) and 0.81-1.02cm^2/s, respectively). In addition, our revised model shows that the optimum height/flow rate is 1.9m/Lpm.

並列關鍵字

Entrapped mixed microbial cell EMMC ； Hydrogen sulfide H2S ； Reaction model ； Kinetic analysis ； Diffusion coefficient