Plant-availability of phosphorus removed from wastewater by different processes
2001 (English)Doctoral thesis, comprehensive summary (Other academic)
The objective of this thesis was to investigate the plant-availability of P removed from wastewater by different processes, with focus on agronomic aspects. Short-term P availability was assessed by greenhouse studies, utilizing four different filter substrates and a sludge-recovered iron phosphate. It was shown that the plant-P availability of these products was not significantly different from that obtained with a water-soluble P fertilizer. It was also found that dewatering method exerted on one FeCl3- precipitated sludge did not influence the plant-P availability. The long-term effects of sludge amendment to agricultural soil was assessed by P ion concentration in solution and P transfer from soil solid phase to solution for soil samples collected from a 19-year old field experiment. The relative plant-P availability (RPA) was found to be 60% for the sludge treatments, a value that was not significantly different from 100%.
Place, publisher, year, edition, pages
Luleå: Luleå tekniska universitet, 2001. , 76 p.
Doctoral thesis / Luleå University of Technology 1 jan 1997 → …, ISSN 1402-1544 ; 2001:18
Research subject Urban Water Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-26353Local ID: dde7aba0-74e2-11db-962b-000ea68e967bOAI: oai:DiVA.org:ltu-26353DiVA: diva2:999515
Godkänd; 2001; 20061114 (haneit)2016-09-302016-09-302016-10-20Bibliographically approved