Olive-Mill Wastewater Composting: Microbiological Aspects

Oxygen consumption, microbial growth, lignin and phenol degradation, urease, protease and nitrogenase activity were determined during the composting of an olive- mill wastewaters (OMW)—wheat straw mixture. Oxygen consumption, microbial growth and urease activity were greatly enhanced during the ther...

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Bibliographic Details
Published in:Waste management & research 1997-06, Vol.15 (3), p.323-330
Main Authors: Galli, E., Pasetti, L., Fiorelli, F., Tomati, U.
Format: Article
Language:English
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Summary:Oxygen consumption, microbial growth, lignin and phenol degradation, urease, protease and nitrogenase activity were determined during the composting of an olive- mill wastewaters (OMW)—wheat straw mixture. Oxygen consumption, microbial growth and urease activity were greatly enhanced during the thermophilic phase, reaching their maximum in about three weeks. Casein-hydrolysing protease showed a high initial activity which sharply decreased after 2 weeks. At the end of the thermophilic phase both phenols and lignin were reduced by about 70%. Composting enhanced diazotrophic microflora as indicated by nitrogenase activity which increased at the end of the thermophilic phase. © 1997 ISWA
ISSN:0734-242X
1096-3669
DOI:10.1177/0734242X9701500309