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Assessment of Alternative Phosphorus Fertilizers for Organic Farming: Sewage Precipitation Products

Wollmann, Iris and Möller, Kurt (2015) Assessment of Alternative Phosphorus Fertilizers for Organic Farming: Sewage Precipitation Products. Dossier/Fact sheet, no. First edition. Universität Hohenheim, ETH Zürich, Research Institute of Organic Agriculture (FiBL), Bioforsk, BOKU, Newcastle University, University of Copenhagen .

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PDF - English (Fact sheet)

Document available online at: https://www.fibl.org/en/shop-en/article/c/fertilization/p/1665-sewage-precipitation-products.html


The application of sewage sludge to agricultural land is currently prohibited in organic farming due to the risk of soil contamination from harmful compounds. Incineration or disposal to landfill of sludge is costly, leads to increased greenhouse gas emissions, and neglects the possibility of nutrient recovery. There are various technologies to recover P by crystallization or precipitation from waste water and sewage sludge. Depending on the input material, nutrient concentrations and concentration of contaminants can vary widely. Regarding the content of potentially toxic elements, the trade-offs between (potentially) toxic element concentrations and potential benefits may be more favorable for treated sewage products than for several natural phosphate rocks or even animal manures or bio waste compost. This fact sheet describes the most important aspects to assess the suitability of sewage sludge precipitation products for use in organic farming.

EPrint Type:Report
Keywords:Sewage sludge, biosolids, Recycling, Phosphorus, IMPROVE-P
Subjects: Crop husbandry > Composting and manuring
Food systems > Recycling, balancing and resource management
Soil > Nutrient turnover
Values, standards and certification > Evaluation of inputs
Research affiliation: European Union > CORE Organic II > IMPROVE-P
Austria > Univ. BOKU Wien > Sustainable Agr. Systems - IfÖL
Austria > FiBL Austria
Switzerland > ETHZ - Agrarwissenschaften
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil
Germany > University of Hohenheim > Institute of Crop Science
Denmark > KU - University of Copenhagen
Norway > Bioforsk - Norwegian Institute for Agriculture and Environmental Research > Bioforsk Soil and Environment Division
UK > Univ. Newcastle
Related Links:http://www.coreorganic2.org
Deposited By: Möller, PD Dr. Kurt
ID Code:28142
Deposited On:17 Feb 2015 12:09
Last Modified:19 May 2021 14:48
Document Language:English
Refereed:Not peer-reviewed

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