ISSN:
1476-5535
Keywords:
Activated sludge
;
Biodegradation
;
Coal slurry wastewater
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Summary Activated sludge was successful in reducing the levels of dissolved organic carbon (DOC) in coal slurry wastewaters. DOC removal by the activated sludge ranged from 61% to 97% with a large percentage (21–41%) of this DOC being completely metabolized to CO2. Second order kinetic constants (k 2) developed for DOC removal ranged from 1.39·10−4 to 2.30·10−1 liter·day−1·(mg of sludge)−1, providing evidence that biological treatment was an effective mechanism for reducing the pollution potential of the slurry wastewaters. After treatment with activated sludge a residual DOC remained in the wastewater and data from ultrafiltration studies indicated that this residual carbon was of MW〉1000. The activated sludge preferentially removed the lower (MW〈1000) molecular weight compounds and the higher molecular weight DOC was more resistant to biological attack. However, extended acclimation (greater than 1 month) enabled the activated sludge to remove the higher molecular weight DOC from the slurry wastewaters.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01569310
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