Influence of a supplemental carbon source on anaerobic dechlorination of pentachlorophenol in granular sludge

Article Abstract:

The dechlorination of pentachlorophenol (PCP) in two upflow anaerobic sludge blanket reactors was discussed. One reactor served as control while the other one used glucose as a supplemental carbon source. Results showed 99% of PCP was dehalogenated in the glucose-supplied reactor while only 32-77% was removed from the control reactor. Tests indicated that the glucose-amended reactors performed better because of higher concentration of biomass and the direct effect of glucose on dehalogenation rate. Further analysis also showed that PCP dechlorination involved an initial para cleavage followed by two ortho cleavages.

Pentachlorophenol, Scission (Chemistry)

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Improved dechlorinating performance of upflow anaerobic sludge blanket reactors by incorporation of Dehalospirillum multivorans into granular sludge

Article Abstract:

A study was conducted to examine the dechlorination of perchloroethylene in an upflow anaerobic sludge blanket reactor which was incorporated with a perchloroethylene-degrading bacterium Dehalospirillum multivorans. Immunological and analytical methods were utilized in investigating the dechlorinating performance of the upflow anaerobic sludge blanket reactor with the said bacterium. Results revealed the bacterium grew in microcolonies which were located at the centers of the granules obtained from the reference 1 reactor.

Analysis, Anaerobic bacteria, Perchloroethylene, Chlorination

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Introduction of a de novo bioremediation ability, aryl reductive dechlorination, into anaerobic granular sludge by inoculation of sludge with desulfomonile tiedjei

Article Abstract:

Pure cultures of Desulfomonile tiedjei are capable of mineralizing 3-chlorobenzoate (3-CB), although mineralization rates are increased by syntrophic interactions within amicrobial consortium. Pure cultures of D. tiedjei and a consortium consisting of D. tiedjei, a benzoate degrader and a hydrogen-utilizing methanogen were used to seed anarobic granular sludge in methanogenic upflow anaerobic granular-sludge blanket reactors. Both treatments were able to confer the ability to dechlorinate 3-CB within the reactors.

Physiological aspects, Bioremediation, Sewage, Sewage microbiology, Water, Water treatment, Chlorophenols

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