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Partial Replacement of Rock Phosphate by Sewage Sludge Ash for the Production of Superphosphate Fertilizers by Hartmann, Tobias Edward; Möller, Kurt; Meyer, Carsten; MÃ1⁄4ller, Torsten is a Agricultural and Biological Sciences article available to read on EtoBox.

What is Partial Replacement of Rock Phosphate by Sewage Sludge Ash for the Production of Superphosphate Fertilizers about?

Thermal utilization of sewage sludge through mono-incineration or gasification results in phosphorus (P) rich sewage sludge ash (SSA) that must be returned to agricultural production systems to fulfill the need for recycling of P resources contained in wastewater streams. As the plant-availability of P contained in SSA is low, we propose feeding SSA directly into the production of superphosphate fertilizers, thereby opening a further pathway for the recycling of phosphorus (P) from wastewater streams to agricultural production systems by using available technologies. We carried out laboratory-scale production of superphosphate test-products, in which rock phosphate (RP) was partially replaced with SSA (gasification) before digestion with concentrated sulfuric acid, and evaluated these products with regard to the solubility of P in H 2 O and neutral ammoniumcitrate solution. We further carried out a growth-chamber experiment (28 d) using maize (Zea mays L. cv. Sulano) as a model plant on a low P (0.4 mg P CAL 100g -1 ), high pH (7.6) substrate to evaluate plant P availability of the test products. Our laboratory-scale results show that at least 8% of P from RP can be replaced by P f

Who reads Partial Replacement of Rock Phosphate by Sewage Sludge Ash for the Production of Superphosphate Fertilizers?

Author

Hartmann, Tobias Edward; Möller, Kurt; Meyer, Carsten; MÃ1⁄4ller, Torsten

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-VCH Verlag; John Wiley & Sons Ltd.; Wiley - V C H Verlag GmbbH & Co.; Wiley (ISSN 0366-2136)

Published

2020

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)