Removal of 3-chlorobenzoate using an upflow anaerobic sludge blanket reactor under light conditions.
The possibility of 3-chlorobenzoate removal from water using an upflow anaerobic sludge blanket (UASB) reactor without the addition of any extra dechlorinating culture under light conditions has been studied on a laboratory scale. Benzoate removal was observed in the first three months of operation under light conditions, but the 3-chlorobenzoate removal was not observed. After three months of operation under light conditions, the 3-chlorobenzoate concentration in the UASB reactor effluent gradually decreased to less than 1 mg x h(-1). The 3-chlorobenzoate concentration in the effluent did not increase under dark conditions. The DOC concentration in the effluent decreased according to the removal of the 3-chlorobenzoate by the UASB granules. These results indicated that granules in the UASB reactor provided the 3-chlorobenzoate removability after 80-100 d of adaptation to the 3-chlorobenzoate, and that the UASB reactor is useful for 3-chlorobenzoate removal.
Biomass Research Group, Institute for Energy Utilization, National Institute of Advanced Industrial Science and Technology, Onogawa, Tsukuba, Ibaraki, Japan.
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Sawayama
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Tsukahara
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Yagishita
D001421:Bacteria, Anaerobic / Q000502:physiology*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002723:Chlorobenzoates / Q000378:metabolism*; D008027:Light; D012722:Sewage / Q000737:chemistry / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000379:methods*
D002723:Chlorobenzoates; D012722:Sewage; C036427:3-chlorobenzoic acid