The Effects of Phenol on Biokinetic Coefficient of Multiple Phenol Derivatives of 2,4-Dichlorophenol and 2,4-Dinitrophenol in Activated Sludge Process

활성슬러지공정에서 페놀이 2,4-디클로로페놀과 2,4-디니트로페놀을 함유한 복합페놀폐수의 미생물분해계수에 미치는 영향

  • Lim, Gye-Gyu (Department of Chemical Engineering, Hoseo University)
  • 임계규 (호서대학교 공과대학 제3(화공환경소방안전)공학부)
  • Received : 1998.08.19
  • Accepted : 1998.11.09
  • Published : 1999.05.10

Abstract

A study was carried out to see the effects of phenol on the biological degradation of a wastewater containing 2,4-dichlorophenol and 2,4-dinitrophenol and the biodegradation kinetic coefficients of Eckenfelder's modified model for the activated sludge process. The system containing base mix (BM) which was formulated with essential energy sources and nutrients was run down and washed out when 2,4-dichlorophenol and 2,4-dinitrophenol was introduced into the base mix unit without acclimation to phenol. Whereas for the system acclimated to phenol, the treatment efficiency was 91.9% in terms of $BOD_5$ and treatability for each chemical of phenol, 2,4-dichlorophenol, and 2,4-dinitrophenol was 99.8%, 43.3% and 62.5% based on concentration, respectively. Additional BM was added into the combined unit containing phenol, 2,4-dichlorophenol, 2,4-dinitrophenol so that the better treatment efficiency was achieved for each compound. The biokinetic coefficient of Eckenfelder's modified model without phenol acclimation was not estimated because the system did not reach the steady state. Thc coefficient for the phenol acclimation was 12.44 /day, however it was changed as 46.91 /day in addition of both of phenol acclimation and 47 mg/l of BM. The results presented above could be useful for the process design and further study in the field of biodegradation of benzene derivatives.

Keywords

Biokinetic Coefficient;Phenol Acclimation;2,4-Dichlorophenol;2,4-Dinitrophenol;Eckenfelder's Modified Alodel;Biodegradation

Acknowledgement

Supported by : 한국학술진흥재단

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