Acclimation of Anaerobic Culture Degrading 2,4-Dichlorophenol and 2,4,6-Trichlorophenol

Abstract

The experiment was conducted to examine the effect of acclimated culture on the 2,4-dichlorophenol and 2,4,6-trichlorophenol degradation. The variation of the chemical oxygen demand (COD) concentration in different degradation systems was also investigated. The results showed that, anaerobic culture began to degrade 2,4-dichlorophenol and 2,4,6-trichlorophenol almost without lag phase. In the early degradation period, the degradation rate of 2,4-dichlorophenol and 2,4,6-trichlorophenol was relatively lower, but the degradation rate improved obviously in the late degradation period. Compared to the fresh culture, the acclimated culture promoted the degradation rate of 2,4-dichlorophenol and 2,4,6-trichlorophenol. The degradation effect of the culture acclimated to 2,4-dichlorophenol and 2,4,6-trichlorophenol was the best to the other culture. In addition, the degradation rate of organics was the highest in the system of 2,4-dichlorophenol and 2,4,6-trichlorophenol acclimated culture.