Squeezing Wastes In A Wastewater
Treatment Plant
Author(s)
I. M. Buendía, F. J. Fernández, J. Villaseñor
& L. Rodríguez
Abstract
In this study, the performance of an anaerobic digester placed in a conventional
wastewater treatment plant was evaluated. For that purpose, two different kinds
of sludges were studied: a mixture of primary and secondary sludge, i.e. waste
sludge, and the sludge after being anaerobically degraded, i.e., stabilized sludge.
The practical biogas potential of the two wastes was studied in batch anaerobic
reactors under mesophilic conditions and was compared with the theoretical
methane potential that was expected from the analyses of different organic
fractions of the two wastes. The obtained results indicated that there was
approximately a 30% of biogas potential without recovering when the waste
sludge was treated in the anaerobic digester. The theoretical and practical
methane potential of the stabilized sludge, 0.16 L CH4 g VS-1 and 0.33 L CH4 g
VS-1 respectively, showed that there were still organic fractions in the stabilized
sludge that could be anaerobically degraded. That means that it is possible to
enhance the methane production of the anaerobic digester of a conventional
wastewater treatment plant by changing some operational conditions, for
instance, the hydraulic retention time.
Keywords: anaerobic digestion, waste sludge, wastewater treatment plant.
1 Introduction
The rapidly increase of population in recent years has resulted in the generation
of a large amount of organic wastes. That makes necessary to change the
methodology for treating those wastes or to improve the existing infrastructure.
Keywords
anaerobic digestion, waste sludge, wastewater treatment plant.
Related Book
Other papers in this volume
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