Operational control of an anaerobic GAC reactor treating hazardous wastes

An expanded bed anaerobic reactor with granular activated carbon (GAC) as the support material was used to evaluate the effects of hydraulic retention time, sludge age and organic loading rate on the treatment performance for coal gasification wastewater. The toxicity of the raw feed necessitated pe...

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Bibliographic Details
Published in:Water science and technology 1989-01, Vol.21 (4/5), p.167-173
Main Authors: Nakhla, G.F, Suidan, M.T, Pfeffer, J.T
Format: Article
Language:English
Subjects:
activated carbon
anaerobic conditions
anaerobic process
Anaerobic treatment
bioreactors
Chemical oxygen demand
coal
Coal conversion
Coal industry wastewaters
COD
Conversion
Detention time
fluidized bed processing
granular activated carbon
Hazardous wastes
hazards
Hydraulic retention time
Influents
Load distribution
Loading rate
methane
methane production
Reactors
Removal
Retention
Retention time
Sludge
Studies
Toxicity
wastes
Wastewater
Wastewater treatment
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Summary:An expanded bed anaerobic reactor with granular activated carbon (GAC) as the support material was used to evaluate the effects of hydraulic retention time, sludge age and organic loading rate on the treatment performance for coal gasification wastewater. The toxicity of the raw feed necessitated periodic replacement of the bed material; the initial results concerned the minimal replacement rate needed to maintain adequate treatment at a loading of 11 g COD per g GAC per day. During subsequent tests of a bench-scale reactor at a constant 35C, very high COD removal efficiencies and methane conversion efficiencies were obtained at hydraulic retention times down to 7 h.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.1989.0220