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Energy neutrality versus carbon footprint minimization in municipal wastewater treatment plants

Abstract

This work aimed to compare the carbon footprint (CF) of six full-scale wastewater treatment plants (WWTPs). The CF was estimated in the range of 23–100 kg CO2e per population equivalent. In the total CF, the direct emissions held the highest share (62–74%) for the plants with energy recovery from biogas. In the plants depending entirely on the power grid, the indirect emissions due to energy consumption dominated the total CF (69–72%). The estimated CF was found highly sensitive towards the choice of N2O emission factors. A dual effect of external substrates co-digestion on the CF has been presented. After co-digestion, the overall CF decreased by 7% while increasing the biogas production by 17%. While applying the empirical model, the level of energy neutrality was strongly related to the ratio of the indirect to direct emissions.

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Details

Category:
Articles
Type:
artykuły w czasopismach
Published in:
BIORESOURCE TECHNOLOGY no. 300, pages 1 - 9,
ISSN: 0960-8524
Language:
English
Publication year:
2020
Bibliographic description:
Maktabifard M., Zaborowska E., Mąkinia J.: Energy neutrality versus carbon footprint minimization in municipal wastewater treatment plants// BIORESOURCE TECHNOLOGY -Vol. 300, (2020), s.1-9
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.biortech.2019.122647
Sources of funding:
Verified by:
Gdańsk University of Technology

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