Treatment of Wastewater Contained Phenol and Sulfide by Submerged Aerated Biofilter

• Main Author: 黃俊哲
• Other Authors: 楊萬發
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/83665926542219938825

碩士 === 國立臺灣大學 === 環境工程學研究所 === 91 === A submerged aerated biofilter was operated under steady condition in order to determine the effects of different operation strategies to remove phenol and sulfide.The result shows that under pH8, at 30℃ and hydraulic loading of 13 m3/m2-day,the biofilter achieved a removal efficiency of 84% for chemical oxygen demand(COD) with initial COD concentrations of 300mg/l .Under the same condition, the removal efficiency is 97% for phenol with initial phenol concentration of 100mg/l. In the aerated biofilter,the impact of temperature on organic removal is due to dissolved oxygen (DO) limitation and bacterial growth rate. When oxygen is limited,the decrease in saturation DO concentration as temperature increases results in a negative temperature impact upon the organic removal rate.the result show that the removal efficiency of phenol at 30℃ is better than that at 25℃under pH6 and pH8.Under pH8,the influent phenol concentration is 200 mg/l ,the removal efficiency is 57% ,while removal efficiency is 29% as the influent phenol concentration is 400mg/l. It is found that there is no significant efficiency on sulfide removal .The study shows that the best removal efficiency of phenol is at pH6 and pH8 while the influent phenol concentration is under 400mg/l.