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Assessment of risks related to agricultural use of sewage sludge, pig and cattle slurry


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Eggers Pedersen, Kathrine; Brandt, Kristian Kofoed; Hansen, MAx; Cedergreen, Nina and Magid, Jakob (2019) Assessment of risks related to agricultural use of sewage sludge, pig and cattle slurry. Copenhagen University , Department of Plant and Environmental Sciences University of Copenhagen Thorvaldsensvej 40, 1871 Frederiksberg C, Copenhagen.

[img] PDF - Published Version - English

Online at: https://plen.ku.dk/raadgivning/rapporter/Assessment_of_risks_related_to_agricultural_use_of_sewage_sludge_pig_and_cattle_slurry.pdf


In April 2017, the Organic Business Development Team released a report with 25 recommendations for the Minister of Environment and Food (Det økologiske erhvervsteam 2017). Among these was a recommendation that organic farmers should have opportunities for utilizing nutrients from treated domestic wastewater for nutrient recycling.
A prerequisite for future use of nutrients from treated wastewater is, that quality requirements are met and that application can be explained to (and accepted by) consumers. In partial fulfilment of this, the business team identified a need for a scientific overview of the risks of using nutrients from treated municipal wastewater in relation to other authorized fertilizer sources – e.g. conventional animal manures. Thus, it was assumed that a comparative approach to assess potential risk of using sewage sludge and conventional manures, could usefully inform decision makers in the future regulation of organic farming systems.
Dependent on the result of the scientific investigation, the Organic Business Development Team foresaw that Denmark could chose to work to expand Annex 1 of the EU Ecology Regulation, to allow the organic farmers to use nutrients from municipal wastewater or other acceptable derived sludge products. Mobilization of support for this should be done by the Ministry of Environment and Food in collaboration with the Organic Farming Industry.
Thus, based on available literature, this report aims at creating an overview of the environmental and human risks associated with application of pig and cattle slurry as well as sewage sludge to agricultural soils. The risk evaluation was performed for the following compound groups: Metals, Chlorophenyls, Dioxins, Furans, Halogenated aliphatic and aromatic hydrocarbons (HAH), Linear alkylbenzenesulfonates (LAS), Polyaromatic hydrocarbons (PAH), Polybrominated diphenyl ethers (PBDE), Polychlorinated biphenyls (PCB), Poly- and perfluorinated alkylated substances (PFAS), Phenols, Phosphate-triesters
VII, Phthalates, Polychlorinated naphtalenes (PCN), Polychlorinated alkanes (PCA), Triclosan, Triclocarban, Medicines, Estrogens, Antibiotic resistance genes.
Additionally the fertilizer potential of the two nutrient sources was characterized and compared.

EPrint Type:Report
Keywords:Risk assessment, Sewage sludge, Cattle slurry, Pig slurry, medicinal residues, xenobiotic organic compounds, heavy metals, antibiotic resistance, fertilizer value
Agrovoc keywords:
Subjects: Soil > Soil quality
Values, standards and certification > Assessment of impacts and risks
Soil > Nutrient turnover
Environmental aspects > Biodiversity and ecosystem services
Farming Systems > Farm nutrient management
Values, standards and certification > Evaluation of inputs
Research affiliation: Denmark > Organic RDD 3 > NutHY
Deposited By: Magid, Assoc. Prof. Jakob
ID Code:37490
Deposited On:20 Mar 2020 10:37
Last Modified:20 Mar 2020 10:37
Document Language:English
Refereed:Not peer-reviewed

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