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Dairy processing sludge and co-products: A review of present and future re-use pathways in agriculture
Summary
This review examines current and potential uses of dairy processing sludge and similar nutrient-rich residues as agricultural fertilizers and soil amendments. It also flags concerns about contaminants in these materials — including residues of antibiotics, hormones, and potentially microplastics — that could enter the food chain.
• DPS and STRUBIAS used in agriculture as bio-fertilizers and soil amendments. • DPS and STRUBIAS applied to crops but without knowledge of their N and P FEV. • Residues of antimicrobial drugs, hormones and pesticides need testing. • Disinfectant and persistent organic pollutant residues need to be characterised. • Quantification of micro-plastics and nano-particles in waste-soil-crop needed.
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