Impact of time and phosphorus application rate on phosphorus bioavailability and efficiency of secondary fertilizers recovered from municipal wastewater.

Chemosphere
Aleksandra BogdanErik Meers

Abstract

Demand for phosphorus (P) resources other than non-renewable P rock has driven the development of several P recovery technologies from municipal wastewater treatment and directed recovery of P into valuable fertilizers (struvite, ash, iron phosphate, etc.). Although the bioavailability of novel secondary P fertilizers has been examined in previous studies, insufficient attention has been paid to defining optimal plant growth duration and monitoring conditions to assess the dynamic changes in P. Accordingly, five fertilizers recovered from municipal wastewater: two struvites (STRSL and STRLQ), two ashes (ASH1 and ASH2), and iron-phosphate pelletized sludge (FeP) using triple superphosphate (TSP) as a positive control and blank (zero P) as a negative control, were applied to P poor-sand at three P doses (equivalent to 30, 60, and 90 kg P2O5 ha-1). Fertilizer impact on perennial ryegrass (Lolium perenne) dry matter (DM) and P concentration were evaluated on a monthly basis for seven months. DM and relative agronomical efficiency (RAE) have shown the same trend between the fertilizers, but only at the lowest P dose (corresponding to 30 kg P2O5 ha-1). At higher P doses (60, and 90 kg P2O5 ha-1) the differences in DM and RAE among th...Continue Reading

References

Oct 1, 2015·The Science of the Total Environment·Kimo C van DijkOene Oenema
Jul 19, 2016·Plant and Soil·Peter J TalboysPaul J A Withers
Aug 3, 2016·Waste Management·Nothando Cynthia Shiba, Freeman Ntuli
May 18, 2017·The Science of the Total Environment·O DubocW W Wenzel
May 28, 2017·Environmental Science and Pollution Research International·Ebrahem M EidKhaled F Fawy
Sep 10, 2020·The Science of the Total Environment·Mina KianiPriit Tammeorg

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