Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment

Abstract Energy neutrality and reduction of carbon emissions are significant challenges to the enhanced sustainability of wastewater treatment plants (WWTPs). Harvesting energy from wastewater carbonaceous substrates can offset energy demands and enable net power generation; yet, there is limited re...

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Autores principales:	Yanbo Li, Xu Wang, David Butler, Junxin Liu, Jiuhui Qu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eabf2f9c20b24480a1570326ef885c12
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spelling	oai:doaj.org-article:eabf2f9c20b24480a1570326ef885c122021-12-02T15:05:58ZEnergy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment10.1038/s41598-017-00245-12045-2322https://doaj.org/article/eabf2f9c20b24480a1570326ef885c122017-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00245-1https://doaj.org/toc/2045-2322Abstract Energy neutrality and reduction of carbon emissions are significant challenges to the enhanced sustainability of wastewater treatment plants (WWTPs). Harvesting energy from wastewater carbonaceous substrates can offset energy demands and enable net power generation; yet, there is limited research about how carbonaceous substrates influence energy and carbon implications of WWTPs with integrated energy recovery at systems-level. Consequently, this research uses biokinetics modelling and life cycle assessment philology to explore this notion, by tracing and assessing the quantitative flows of energy embodied or captured, and by exploring the carbon footprint throughout an energy-intensive activated sludge process with integrated energy recovery facilities. The results indicate that energy use and carbon footprint per cubic meter of wastewater treated, varies markedly with the carbon substrate. Compared with systems driven with proteins, carbohydrates or other short-chain fatty acids, systems fed with acetic acid realized energy neutrality with maximal net gain of power from methane combustion (0.198 kWh) and incineration of residual biosolids (0.153 kWh); and also achieved a negative carbon footprint (72.6 g CO2). The findings from this work help us to better understand and develop new technical schemes for improving the energy efficiency of WWTPs by repurposing the stream of carbon substrates across systems.Yanbo LiXu WangDavid ButlerJunxin LiuJiuhui QuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yanbo Li Xu Wang David Butler Junxin Liu Jiuhui Qu Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment
description	Abstract Energy neutrality and reduction of carbon emissions are significant challenges to the enhanced sustainability of wastewater treatment plants (WWTPs). Harvesting energy from wastewater carbonaceous substrates can offset energy demands and enable net power generation; yet, there is limited research about how carbonaceous substrates influence energy and carbon implications of WWTPs with integrated energy recovery at systems-level. Consequently, this research uses biokinetics modelling and life cycle assessment philology to explore this notion, by tracing and assessing the quantitative flows of energy embodied or captured, and by exploring the carbon footprint throughout an energy-intensive activated sludge process with integrated energy recovery facilities. The results indicate that energy use and carbon footprint per cubic meter of wastewater treated, varies markedly with the carbon substrate. Compared with systems driven with proteins, carbohydrates or other short-chain fatty acids, systems fed with acetic acid realized energy neutrality with maximal net gain of power from methane combustion (0.198 kWh) and incineration of residual biosolids (0.153 kWh); and also achieved a negative carbon footprint (72.6 g CO2). The findings from this work help us to better understand and develop new technical schemes for improving the energy efficiency of WWTPs by repurposing the stream of carbon substrates across systems.
format	article
author	Yanbo Li Xu Wang David Butler Junxin Liu Jiuhui Qu
author_facet	Yanbo Li Xu Wang David Butler Junxin Liu Jiuhui Qu
author_sort	Yanbo Li
title	Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment
title_short	Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment
title_full	Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment
title_fullStr	Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment
title_full_unstemmed	Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment
title_sort	energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: an integrated exploration of biokinetics and life-cycle assessment
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/eabf2f9c20b24480a1570326ef885c12
work_keys_str_mv	AT yanboli energyuseandcarbonfootprintsdifferdramaticallyfordiversewastewaterderivedcarbonaceoussubstratesanintegratedexplorationofbiokineticsandlifecycleassessment AT xuwang energyuseandcarbonfootprintsdifferdramaticallyfordiversewastewaterderivedcarbonaceoussubstratesanintegratedexplorationofbiokineticsandlifecycleassessment AT davidbutler energyuseandcarbonfootprintsdifferdramaticallyfordiversewastewaterderivedcarbonaceoussubstratesanintegratedexplorationofbiokineticsandlifecycleassessment AT junxinliu energyuseandcarbonfootprintsdifferdramaticallyfordiversewastewaterderivedcarbonaceoussubstratesanintegratedexplorationofbiokineticsandlifecycleassessment AT jiuhuiqu energyuseandcarbonfootprintsdifferdramaticallyfordiversewastewaterderivedcarbonaceoussubstratesanintegratedexplorationofbiokineticsandlifecycleassessment
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Energy use and carbon footprints differ dramatically for diverse wastewater-derived carbonaceous substrates: An integrated exploration of biokinetics and life-cycle assessment

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