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Land application of sewage sludge incinerator ash for phosphorus recovery: A review.
- Source :
-
Chemosphere . Jul2021, Vol. 274, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- Phosphorus (P) is essential for all living things and an integral part of food production. However, significant amounts of P are functionally lost when wastewater byproducts, such as biosolids or sewage sludge incinerator ash (SSA), are not beneficially reused. Around 20% of sewage sludge produced in the US is incinerated and nearly 25% of sewage sludge is incinerated in European Union member countries. SSA contains significant amounts of P (up to 14% total P) and other beneficial elements but is typically sent to landfills for disposal. However, SSA has also been explored as one method of capturing and redirecting P back into the food system. Research investigating SSA characterization, P availability, and contaminant concentrations and behavior in soil is required to understand the effects of SSA land application on soil chemical properties and crop production. Several approaches for recovering P from SSA have been investigated that consider these factors. Ultimately, the opportunity for land application of SSA depends on the individual characteristics of a given SSA, ex. total P and contaminant concentrations, and the requirements and regulations of the region where it is produced and applied. In this review, we address the history of P recovery from SSA and discuss research regarding characterization, contaminants, P availability, and land application of SSA. [Display omitted] • Sewage sludge ash, currently landfilled, is a potential P source for crop growth. • Ash properties depend on influent, sludge treatment, and incinerator temperature. • Treated ash can have improved qualities but economic tradeoffs should be explored. • More studies are required to understand agronomic effects of sewage sludge ash. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00456535
- Volume :
- 274
- Database :
- Academic Search Index
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 150125153
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2021.129609