Bulk pH and Carbon Source Are Key Factors for Calcium Phosphate Granulation
| Autor: | Sara Morais, Joana C. Silva, Grietje Zeeman, Renata D. van der Weijden, Cees J.N. Buisman, Lucía Hernández Leal, Jorge Ricardo Cunha |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Calcium Phosphates
chemistry.chemical_element 010501 environmental sciences Calcium 01 natural sciences Waste Disposal Fluid Article Granulation Bioreactors Bioreactor Life Science Environmental Chemistry Anaerobiosis 0105 earth and related environmental sciences WIMEK Sewage Phosphorus General Chemistry Hydrogen-Ion Concentration Carbon chemistry Wastewater Chemical engineering Environmental Technology Composition (visual arts) Milieutechnologie Biological Recovery & Re-use Technology Waste disposal |
| Zdroj: | Environmental Science and Technology, 53(3), 1334-1343 Environmental Science & Technology Environmental Science and Technology 53 (2019) 3 |
| ISSN: | 0013-936X |
| Popis: | Recovery of calcium phosphate granules (CaP granules) from high-strength wastewater is an opportunity to reduce the natural phosphorus (P) scarcity, geographic imbalances of P reserves, and eutrophication. Formation of CaP granules was previously observed in an upflow anaerobic sludge bed (UASB) reactor treating source separated black water and is enhanced by Ca2+ addition. However, the required operating conditions and influent composition for CaP granulation are still unknown. In this study, we have experimentally demonstrated that the carbon source and bulk pH are crucial parameters for the formation and growth of CaP granules in a UASB reactor, operating at relatively low upflow velocity (1.4 mm diameter from 9 to 5 wt % P. Moreover, for bulk pH 7.5, co-precipitation of CaCO3 with Cax(PO4)y was reduced. |
| Databáze: | OpenAIRE |
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