厭氧流體化床生物反應器處理高濃度工業廢水之案例研究
Case study of full-Scale anaerobic fluidized bed bioreactors treating high-strength industrial wastewater
酚醛樹脂類廢水中的主要組成為酚與醛，其中，甲醛似乎在低於生物毒性容許濃度下是可生物降解且和不具毒性。於本案例，厭氧生物流體化床生物處理技術被成功用於處理含高濃度含酚與醛的廢水，COD去除率高達95%，且酚與醛可完全被去除。本技術處理醛的關鍵為控制進流水中醛的濃度低於生物毒性容許濃度下。因為高迴流速度下，厭氧生物流體化床可提供含醛廢水充足的處理環境。
Spent formaldehyde and phenol are the main components of wastewater
obtained from the manufacturing of
phenol-formaldehyde resins. Although toxic for microorganisms, formaldehyde appears to be biodegradable and nontoxic in concentrations below
the threshold level of toxicity. In this case
study, an anaerobic fluidized bed bioreactor successfully treated wastewater
that contained high concentrations of phenol
and formaldehyde by recycling the final effluents of wastewater treatment processes. The anaerobic fluidized bed
bioreactor reached 95 % COD removal, and
formaldehyde and phenol were completely removed. Maintaining the concentration of
formaldehyde in a bulk solution far below the concentration
of the threshold level plays the key role in degrading
formaldehyde completely. Because of the high circulation rates, the anaerobic fluidized bed bioreactor can be considered to provide an adequate
way to treat wastewater that contains formaldehyde.
作者：T.M. Liang*, S.F. Hsu*, G.H. Huang* and S.S. Cheng**
★文章出處：5th Specialised Conference on Small Water and Wastewater Treatment Systems
Istanbul-Turkey, 24-26 September 2002
