Closed-loop Controlled Environment Agriculture through Aerobic Composting

dc.contributor.advisorGraham, Thomas
dc.contributor.advisorDixon, Mike
dc.contributor.authorDsouza, Ajwal of Environmental Sciencesen_US of Guelphen of Scienceen_US Sciencesen_US
dc.description.abstractControlled environment agriculture (CEA) is a nascent technology for sustainable vegetable production. However, mismanagement of biowaste produced stymies CEA's sustainability. Closed- loop CEA systems follow a circular resource-loop, wherein the biowaste is valorized to recover resources. This work investigated the viability of composting CEA biowaste to close the CO2 loop for CEA systems. First, a theoretical framework was delineated for a compost-based closed-loop CEA system. Next, a respirometric system was developed to characterize the CO2 recovery of CEA biowaste. Theoretical analyses indicated a substantial deficit of CO2 recoverable by composting CEA biowaste of baby lettuce needed for atmospheric enrichment. Therefore, spent coffee grounds (SCG) as an additive to meet the deficit was tested using respirometric methods. Composting baby lettuce biowaste and SCG at a 1:1 ratio could still be insufficient to meet the CO2 deficit. Large-scale composting of external waste could be required to establish a viable closed-loop CEA system.en_US
dc.description.sponsorshipOntario Agri-Food Innovation Alliance
dc.description.sponsorshipWe The Roots
dc.description.sponsorshipGreenhouse Technology Network
dc.description.sponsorshipFederal Economic Development Agency for Southern Ontario
dc.identifier.citationDsouza, A., Price, G. W., Dixon, M., & Graham, T. (2021). A Conceptual Framework for Incorporation of Composting in Closed-Loop Urban Controlled Environment Agriculture. Sustainability, 13(5), 2471.
dc.publisherUniversity of Guelphen
dc.rightsAttribution-ShareAlike 4.0 International*
dc.subjectcircular bioeconomyen_US
dc.subjectcarbon dioxide enrichmenten_US
dc.subjectresource recoveryen_US
dc.subjectwaste managementen_US
dc.subjectgreenhouse gasesen_US
dc.subjectvertical farmsen_US
dc.titleClosed-loop Controlled Environment Agriculture through Aerobic Compostingen_US


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