Assessment of alternative phosphorus fertilizers for organic farming: Sewage precipitation products
Abstract
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 of precipitation from waste waster and sewage sludge. Depending on the input material, nutrient concentrations and concentration of contaminants can cary 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. Show more
Publication status
publishedJournal / series
Fact Sheet of Improve-PPublisher
Universität HohenheimOrganisational unit
03427 - Frossard, Emmanuel / Frossard, Emmanuel
More
Show all metadata
ETH Bibliography
yes
Altmetrics