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Dairy processing sludge and co-products: A review of present and future re-use pathways in agriculture

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Show simple item record Shi, W. Healy, Mark G. Ashekuzzaman, S.M. Daly, K. Leahy, James J. Fenton, O. 2021-09-03T08:17:33Z 2021-09-03T08:17:33Z 2021
dc.description peer-reviewed en_US
dc.description.abstract The dairy industry is one of the largest global producers of wastewater and generates huge volumes of dairy processing sludge (DPS). There are two main types of DPS, lime-treated dissolved air floatation sludge and bio-chemically-treated activated sludge. These sludge types may also be converted to STRUBIAS (STRUvite, BIochar, AShes) products which have potential as fertilizers, secondary feedstocks for phosphate fertiliser granules, and soil amendments. A small number of studies indicate that these products have variable nutrient and metal contents, which differ across sludge and STRUBIAS product types. This is due to many factors such as the type of dairy plants, wastewater treatment process and production technologies. Although such products are land applied, the phosphorus (P) and nitrogen (N) fertilizer equivalency value (FEV) are often unknown and not factored into application rates, and therefore need study under field conditions (across soil and crop types). This review identifies a need to quantify antimicrobial drugs, hormones, pesticides, disinfectants, persistent organic pollutants (POPs), microplastics and nano-particles in all DPS and STRUBIAS types. Where detected, testing should follow the transfer of these contaminants to the soil, crop and water continuum. Further knowledge in the areas identified would enable both agronomic and environmental goals to be met and promote higher uptake of DPS and STRUBIAS re-use in agriculture. en_US
dc.language.iso eng en_US
dc.publisher Elsevier en_US
dc.relation.ispartofseries Journal of Cleaner Production;314, 128035
dc.subject Dairy processing sludge en_US
dc.subject Agriculture en_US
dc.title Dairy processing sludge and co-products: A review of present and future re-use pathways in agriculture en_US
dc.type info:eu-repo/semantics/article en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.identifier.doi 10.1016/j.jclepro.2021.12803
dc.contributor.sponsor Horizon 2020 en_US
dc.contributor.sponsor ERC
dc.relation.projectid 814258 en_US
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US

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