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Effect of reactive substrates used for phosphorus removal from wastewater on the feritlity of acid soils
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
Department of Soil Science and Soil Protection, Agricultural University of Cracow.
Department of Soil Science and Soil Protection, Agricultural University of Cracow.
KTH, School of Architecture and the Built Environment (ABE), Land and Water Resources Engineering.
2008 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 99, no 10, 4308-4314 p.Article in journal (Refereed) Published
Abstract [en]

Reactive substrates used in filter systems can reduce phosphorus (P) pollution and, once saturated with P, may be recycled in agriculture. These substrates are usually calcium carbonate derivates with high pH values, which may be particularly beneficial for acid soils. Three reactive substrates (Filtra P, Polonite and wollastonite) saturated with P were used as amendments to an acid soil in a pot experiment. Substrate amendments tended to improve ryegrass yield and P uptake compared with control and potassium phosphate treatments. Polonite produced the highest yield/amendment ratio, while Polonite and Filtra P significantly increased the concentrations of P and Ca in the ryegrass. Addition of all three substrates increased the pH, AL-extractable P and cation exchange capacity of soils during the experiment. These substrates can therefore be applied to acid soils in order to recycle P and improve soil properties.

Place, publisher, year, edition, pages
2008. Vol. 99, no 10, 4308-4314 p.
Keyword [en]
Fertilizer, Filtra P, Phosphorus recycling, Polonite, Pot experiment, Ryegrass, Wollastonite
National Category
Oceanography, Hydrology, Water Resources
Identifiers
URN: urn:nbn:se:kth:diva-7348DOI: 10.1016/j.biortech.2007.08.037ISI: 000255109900044Scopus ID: 2-s2.0-40749120107OAI: oai:DiVA.org:kth-7348DiVA: diva2:12340
Note
Uppdaterad från submitted till published: 20101103. QC 20101103Available from: 2007-06-20 Created: 2007-06-20 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Phosphorus recycling from wastewater to agriculture using reactive filter media
Open this publication in new window or tab >>Phosphorus recycling from wastewater to agriculture using reactive filter media
2007 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

This thesis focused on testing the suitability of reactive filter media used for phosphorus (P) removal from wastewater as fertilizers, thus recycling P to agriculture. The work compared the P sorption capacity of several materials in order to assess their suitability as a source of P for plants. The selected materials (Filtra P, Polonite and wollastonite) were saturated with P and used as soil amendments in a pot experiment. The amendments tended to improve the yield of barley and ryegrass compared with no P addition. The amendments also increased soil pH, P availability and cation exchange capacity in the studied soils. The substrates studied here can be of particular interest for acid soils. Of the materials studied, Polonite appears to be the most suitable substrate for the recycling of P from wastewater to agriculture

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. viii, 28 p.
Series
Trita-LWR. LIC, ISSN 1650-8629 ; 2039
Keyword
Filtra P, phosphorus, Polonite, recycling, sorption, wollastonite
National Category
Oceanography, Hydrology, Water Resources
Identifiers
urn:nbn:se:kth:diva-4449 (URN)978-91-7178-715-6 (ISBN)
Presentation
2007-06-15, V23, KTH, Teknikringen 72, Stockholm, 13:15
Opponent
Supervisors
Note
QC 20101103Available from: 2007-06-20 Created: 2007-06-20 Last updated: 2010-11-03Bibliographically approved
2. Recycling Filter Substrates used for Phosphorus Removal from Wastewater as Soil Amendments
Open this publication in new window or tab >>Recycling Filter Substrates used for Phosphorus Removal from Wastewater as Soil Amendments
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis studied the viability of recycling filter substrates as soil amendments after being used in on-site systems for phosphorus (P) removal from wastewater. Focus was put on the materials Filtra P and Polonite, which are commercial products used in compact filters in Sweden. A prerequisite for this choice was to review filter materials and P sorption capacity. The filter substrates (Filtra P, Polonite and wollastonite tailings) were recycled from laboratory infiltration columns as soil amendments to a neutral agricultural soil and to an acid meadow soil to study their impacts on soil properties and yield of barley and ryegrass. The amendments tended to improve the yield and showed a liming effect, significantly increasing soil pH and the availability of P. In another experiment, samples of Filtra P and Polonite were equilibrated in batch experiments with the two soils in order to study the P dynamics in the soil-substrate system.  Batch equilibrations confirmed the liming potential of Filtra P and Polonite and showed that improved P availability in soils was strongly dependent on substrate P concentration, phase of sorbed P, and soil type. Finally, samples of Polonite used for household wastewater treatment were recycled as soil amendments to a mountain meadow and to an agricultural field for wheat cropping. The liming effect of Polonite was confirmed under field conditions and the results were similar to those of lime for the mountain meadow soil. However, the results were quite different for the agricultural field, where Polonite did not affect soil pH or any other chemical and physical soil properties investigated and had no impact on wheat yield and quality. The results from field experiments suggested that Polonite can be safely recycled to meadows and cropping fields at rates of 5-10 ton ha-1 but long-term studies are needed to forecast the effects of accumulation.

Place, publisher, year, edition, pages
Stockholm: KTH, 2009. viii, 35 p.
Series
Trita-LWR. PHD, ISSN 1650-8602 ; 1049
Keyword
Compact filter; Filtra P; Phosphorus recycling; Polonite; Soil amendment; Sorption isotherms
National Category
Soil Science Inorganic Chemistry Agricultural Science Water Engineering Environmental Sciences
Identifiers
urn:nbn:se:kth:diva-10204 (URN)978-91-7415-289-0 (ISBN)
Public defence
2009-05-15, F3, Lindstedtsvägen 26, KTH, Stockholm, 10:00 (English)
Opponent
Supervisors
Note
QC 20100708Available from: 2009-05-12 Created: 2009-04-01 Last updated: 2011-10-18Bibliographically approved

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