The Effect of Bioinduced Increased pH on the Enrichment of Calcium Phosphate in Granules during Anaerobic Treatment of Black Water.

ABSTRACT: Simultaneous recovery of calcium phosphate granules (CaP granules) and methane in anaerobic treatment of source separated black water (BW) has been previously demonstrated. The exact mechanism behind the accumulation of calcium phosphate (Ca _x(PO₄) _y) in CaP granules during black water treatment was investigated in this study by examination of the interface between the outer anaerobic biofilm and the core of CaP granules. A key factor in this process is the pH profile in CaP granules, which increases from the edge (7.4) to the center (7.9). The pH increase enhances supersaturation for Ca _x(PO₄) _y phases, creating internal conditions preferable for Ca _x(PO₄) _y precipitation. The pH profile can

SUBMITTER: Cunha JR 

PROVIDER: S-EPMC6256346 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature