Washing and Heat Treatment of Aluminum-Based Drinking Water Treatment Residuals to Optimize Phosphorus Sorption and Nitrogen Leaching: Considerations for Lake Restoration

Abstract

Drinking water treatment residuals (DWTRs) generated during drinking water treatment have been proposed for use in lake restoration as a solid-phase sorbent to inactivate phosphorus (P) in lake sediment. However, treatments that minimize leaching of nitrogen (N) and optimize P sorption capacity may be necessary prior to use. This study assessed seven different treatment methods, including washing and heat treatments at different temperatures and with and without oxygen limitation, among two DWTRs from Thailand. Results showed that oxygen-limited heat treatment at 600 degrees C substantially reduced N leaching (

Keywords

adsorption; alum sludge; binding efficiency; biochar; coagulant; eutrophication; oxidation; pyrolysis

Published in

Water
2021, volume: 13, number: 18, article number: 2465

SLU Authors

• Huser, Brian

  • Department of Aquatic Sciences and Assessment, Swedish University of Agricultural Sciences
    

Global goals (SDG)

SDG6 Clean water and sanitation

UKÄ Subject classification

Water Treatment

Publication identifier

• DOI: https://doi.org/10.3390/w13182465

Permanent link to this page (URI)

https://res.slu.se/id/publ/113670