Removal of 2,4-dichlorophenol by suspended and immobilized Bacillus insolitus.
In this experiment, Bacillus insolitus was isolated and selected from a mixed culture that have been acclimated to chlorophenols. Decomposition of chlorophenolic compounds will be studied using this pure culture in both suspended and immobilized form. The results are: at lower initial concentrations of 2,4-dichlorophenol (10-50 mg/l), immobilized Bacillus insolitus shows a higher removal of 2,4-dichlorophenol than Bacillus insolitus in suspended growth. When the 2,4-dichlorophenol concentration becomes higher (50-200 mg/l), both immobilized and suspended Bacillus insolitus have approximately the same efficiency for removal of 2,4-dichlorophenol. Higher concentrations of 2,4-dichlorophenol are inhibitive to the growth of either suspended or immobilized Bacillus insolitus. At lower concentrations of 2,4-dichlorophenol, immobilized mixed culture may have the same removal efficiency of 2,4-dichlorophenol as immobilized pure culture of Bacillus insolitus. But with regard to the overall 2,4-dichlorophenol removal efficiency, immobilized pure culture is considered to be superior to immobilized mixed culture.
Wang
C C
CC
Department of Environmental Engineering, National Chung Hsing University, Taichung, Taiwan, ROC. wang@enve.ev.nchu.edu.tw
Lee
C M
CM
Kuan
C H
CH
D001407:Bacillus / Q000502:physiology*; D001673:Biodegradation, Environmental; D002733:Chlorophenols / Q000737:chemistry*; D006801:Humans; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D018508:Water Purification / Q000379:methods
D002733:Chlorophenols; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; C004762:2,4-dichlorophenol