Back to Search
Start Over
Phosphate recovery and simultaneous nitrogen removal from urine by electrochemically induced struvite precipitation
- Source :
- Environmental Science and Pollution Research. 28:5625-5636
- Publication Year :
- 2020
- Publisher :
- Springer Science and Business Media LLC, 2020.
-
Abstract
- The direct discharge of urine into water bodies leads to environmental pollution, and an increase in the water treatment cost, whereas recycling of the nutrients in urine is of significant economic value. A single-compartment reactor was investigated for the recycling of phosphate and simultaneous removal of nitrogen from urine wastewater by electrochemical magnesium induction, and electrochemical oxidation for the removal of residual nitrogen from the supernatant. The results demonstrated that phosphate recovery capacity was greater than 11 mg P cm−2 h−1 at a current density of 15 m A cm−2 and anodizing time of 20 min; the removal rates of ammonium and total nitrogen in the synchronous electrochemical oxidation were 80% and 75%, respectively, at a current density of 45 m A cm−2 and anodizing time of 60 min. The anodizing time and initial pH were determined to be critical control factors in the electrochemical struvite induction and nitrogen electrochemical oxidation. The on-site electrochemical nitrogen oxidation could rapidly utilize the alkaline supernatant following phosphate recovery. Thus, the integration of the single-compartment reactor, electrochemical magnesium dosage, and simultaneous nitrogen electrochemical oxidation demonstrates potential for application to decentralized reactors to treat source-separated urine.
- Subjects :
- Nitrogen
Struvite
Health, Toxicology and Mutagenesis
Magnesium Compounds
chemistry.chemical_element
Environmental pollution
010501 environmental sciences
Waste Disposal, Fluid
01 natural sciences
Phosphates
chemistry.chemical_compound
Chemical Precipitation
Environmental Chemistry
Ammonium
0105 earth and related environmental sciences
Chemistry
Magnesium
General Medicine
Phosphate
Pollution
Wastewater
Denitrification
Water treatment
Nuclear chemistry
Subjects
Details
- ISSN :
- 16147499 and 09441344
- Volume :
- 28
- Database :
- OpenAIRE
- Journal :
- Environmental Science and Pollution Research
- Accession number :
- edsair.doi.dedup.....394ac96eaa215d0a73d9b5eb223319dd