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Sodium inhibition and sulphate reduction in the anaerobic treatment of mussel processing wastewaters
Author(s) -
Soto Manuel,
Méndez Ramón,
Lema Juan M.
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280580102
Subject(s) - anaerobic filter , anaerobic exercise , chemistry , sodium , effluent , antagonism , acetic acid , food science , pulp and paper industry , anaerobic digestion , methane , biochemistry , environmental engineering , biology , environmental science , organic chemistry , physiology , receptor , engineering
An anaerobic filter treating high saline wastewaters from a sea food processing industry was subjected to sodium and sulphate shocks. Sodium concentrations ranging from 5 to 12 g dm −3 had no significant influence on the methane production rate, with maximum value of 15 kg COD CH 4m −3 day −1 . The sulphate‐reducing capacity of the filter was estimated at 2.2 kg SO 4 2‐ m −3 day −1 . When using propionic or acetic acid as substrates, the sulphate‐reducing activities were 0.021 and 0.006 g SO 4 2‐ g −1 VSS day −1 respectively. Determination of the methanogenic activity of the sludges indicated that sodium concentrations of 14 g dm −3 caused a 50% inhibition of the methanogenic activity from the anaerobic filter. However, when using the anaerobic filter effluent as the assay medium, the sodium concentration giving the same percent inhibition was 17.7 g dm −3 , indicating a beneficial effect probably due to the antagonism caused by the presence of other sea salts. The sludge showed a higher tolerance to sodium toxicity than that reported in previous literature, which can be explained as a consequence of sludge adaptation.