Anaerobic Codigestion Of Biowastes Generated
In Castilla-La Mancha (Spain): Batch Studies
Author(s)
L. Rodríguez, J. Villaseñor, V. Sánchez, F. J. Fernández
& I. M. Buendía
Abstract
The combined anaerobic treatment of waste activated sludge (WAS) with olive
oil mill wastes (OMW) and waste activated sludge with wine vinasses (VN), was
investigated in batch reactors. The codigestion was studied by mixing the WAS
with different ratios of OMW or VN. The criteria used for judging the success of
the codigestion was the COD reduction, total methane production and methane
yield. The results indicate that COD removal is better when biowastes are mixed.
Total methane production in codigestion was higher than that from anaerobic
digestion of raw wastes. A maximum was reached when WAS:OMW and
WAS:VN were mixed in ratios of 6:94 and 25:75, respectively. When the ratio of
OMW was increased in the mixture, the total methane production decreased.
This effect could be explained because of the inhibition caused by the
polyphenol contained in this waste.
Keywords: anaerobic digestion, codigestion, olive oil mill waste, wine vinasses
waste activated sludge.
1 Introduction
Agro-industries play a significant role in and represent a considerable share of
the Spanish economy, mainly in central Spain in regions such as Castilla-La
Mancha. Every year 1.4-1.8 million tons of olive oil are produced in
Mediterranean countries, resulting in 30 million m3 waste [1]. Amongst other
wastes, the main agro-industrial wastes generated in Castilla-La Mancha are
olive oil mill wastes and wine vinasses. The food and drink industry of Castilla-
La Mancha represents the 28.25% of the regional industry. These industries
Keywords
anaerobic digestion, codigestion, olive oil mill waste, wine vinasses
waste activated sludge.
Related Book
Other papers in this volume
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