We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Removal of Ammonium as Struvite from Wet Scrubber Wastewater.
- Authors
Huang, Ariel; Liu, J.
- Abstract
Removal of ammonium (NH) as struvite from the wet scrubber wastewater of a composting plant was investigated. Magnesium salts and phosphate salts were added to the wastewater containing high concentration (29.33 mmol/L) of NH for the precipitation of struvite. Two sets of chemicals, including reagent A (MgCl + KHPO) and reagent B (MgO + 85 % HPO) were used, respectively, at stoichiometric ratio ([Mg]:[NH]:[PO] = 1:1:1) and at different pH ranging from 8 to 9. Experimental results showed that reagent A performed better than reagent B, and 73.3 % NH was removed and recovered as struvite at pH 8.5. Removal efficiency of NH did not improve when molar ratio became higher than stoichiometry. The formation of struvite was confirmed by field emission scanning electron microscope (FESEM), X-ray spectroscopy (EDX), X-ray diffractometer (XRD), and wet chemical analysis. Experimental results were compared with model predictions by PHREEQC. NH removal efficiency was not affected by 5-10 mg/L of Fe(III). The study demonstrated that removal and recovery of NH as struvite from the wet scrubber wastewater is feasible.
- Subjects
AMMONIUM; SEWAGE; COMPOSTING; MAGNESIUM salts; PRECIPITATION (Chemistry); STOICHIOMETRY; SCANNING electron microscopy; X-ray spectroscopy
- Publication
Water, Air & Soil Pollution, 2014, Vol 225, Issue 8, p1
- ISSN
0049-6979
- Publication type
Article
- DOI
10.1007/s11270-014-2062-2