Centralized management of sewage sludge and agro-industrial waste through co-composting

In this research study, the co-composting process of a waste mixture containing strawberry extrudate, fish waste, sewage sludge and bulking agent (SEFW, 190:1:22:90 ratio) was carried out in a dynamic-solid respirometer at pilot scale. The aerobic biodegradability of the mixture was previously ensur...

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Bibliographic Details
Published in:Journal of environmental management 2017-07, Vol.196, p.387-393
Main Authors: Gutiérrez, M.C., Serrano, A., Siles, J.A., Chica, A.F., Martín, M.A.
Format: Article
Language:English
Subjects:
Biodegradability
Carbon
Co-composting
Dynamic olfactometry
Industrial Waste
Odor emission rate
Respirometric index
Sewage
Soil
Solid Waste
Temperature
Waste Management
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Summary:In this research study, the co-composting process of a waste mixture containing strawberry extrudate, fish waste, sewage sludge and bulking agent (SEFW, 190:1:22:90 ratio) was carried out in a dynamic-solid respirometer at pilot scale. The aerobic biodegradability of the mixture was previously ensured in a static-liquid respirometer. The advantages and drawbacks of the SEFW co-composting process were subsequently identified through the determination of respirometric activity and the physical-chemical characterization of the waste, as well as the monitoring of odor emissions. The evolution of the physical-chemical variables showed that pH increased slightly and that the organic matter concentration, expressed as volatile solids (VS, %) or oxidable organic carbon (COXC, %), decreased by around 15% in both cases and by approximately 56% in its biodegradable form (total organic carbon, TOC, %). The low odor emission rate (OER) in the least favorable scenario (the maximum odor generation) during SEFW composting was 1.59 ouE/s, whereas this figure reached 3.52 ouE/s when only the organic fraction of municipal solid waste (OFMSW) was composted. Consequently, the co-composting of SEFW is more favorable in terms of odor emission and permits the simultaneous treatment of different types of waste. •A mixture of sewage sludge and agro-industrial waste (SEFW) was co-composted.•A dynamic-solid respirometer at pilot scale was used.•SEFW biodegradability was previously determined in a static-liquid respirometer.•Physical-chemical and respirometric variables were evaluated during the co-composting.•Odor emissions during SEFW and OFMSW composting were compared.
ISSN:0301-4797
1095-8630
DOI:10.1016/j.jenvman.2017.03.042