Thermophilic anaerobic co-digestion of cattle manure with agro-wastes and energy crops: Comparison of pilot and full scale experiences

The paper deals with the benefits coming from the application of a proper process temperature (55 °C) instead of a ‘reduced’ thermophilic range (47 °C), that is often applied in European anaerobic co-digestion plants. The experimental work has pointed out that biogas production improve from 0.45 to...

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Bibliographic Details
Published in:Bioresource technology 2010, Vol.101 (2), p.545-550
Main Authors: Cavinato, C., Fatone, F., Bolzonella, D., Pavan, P.
Format: Article
Language:English
Subjects:
agricultural wastes
Agronomy. Soil science and plant productions
ammonia
Anaerobic co-digestion
anaerobic digestion
Anaerobiosis
Animals
Biofuel production
Biogas
Biological and medical sciences
Biological treatment of sewage sludges and wastes
Biotechnology
Cattle
Cattle manure
cost analysis
Crops, Agricultural
Economics
Energy
energy crops
Environment and pollution
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Industrial applications and implications. Economical aspects
Industrial Waste
Manure
methane production
organic wastes
Pilot Projects
Thermophilic
Use of agricultural and forest wastes. Biomass use, bioconversion
volatile fatty acids
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Summary:The paper deals with the benefits coming from the application of a proper process temperature (55 °C) instead of a ‘reduced’ thermophilic range (47 °C), that is often applied in European anaerobic co-digestion plants. The experimental work has pointed out that biogas production improve from 0.45 to 0.62 m 3/kg VS operating at proper thermophilic conditions. Moreover, also methane content was higher: from 52% to 61%. A general improvement in digester behaviour was clear also considering the stability parameters comparison (pH, ammonia, VFA content). The second part of the study takes into account the economic aspects related to the capital cost of anaerobic digestion treatment with a 1 MW co-generation unit fro heat and power production (CHP). Moreover, the economic balance was also carried out considering the anaerobic supernatants treatment for nitrogen removal. The simulation showed how a pay-back-time of 2.5 yr and between 3 and 5 yr respectively could be determined when the two options of anaerobic digestion only and together with the application of a nitrogen removal process were considered.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2009.08.043