Phosphate Recovery from Human Waste via the Formation
of Hydroxyapatite during Electrochemical Wastewater Treatment
Version 2 2018-02-12, 20:19
Version 1 2018-02-09, 14:36
Posted on 2018-02-12 - 20:19
Electrolysis
of toilet wastewater with TiO2-coated semiconductor
anodes and stainless steel cathodes is a potentially viable onsite
sanitation solution in parts of the world without infrastructure for
centralized wastewater treatment. In addition to treating toilet wastewater,
pilot-scale and bench-scale experiments demonstrated that electrolysis
can remove phosphate by cathodic precipitation as hydroxyapatite at
no additional energy cost. Phosphate removal could be predicted based
on initial phosphate and calcium concentrations, and up to 80% total
phosphate removal was achieved. While calcium was critical for phosphate
removal, magnesium and bicarbonate had only minor impacts on phosphate
removal rates at concentrations typical of toilet wastewater. Optimal
conditions for phosphate removal were 3 to 4 h treatment at about
5 mA cm–2 (∼3.4 V), with greater than 20
m2 m–3 electrode surface area to reactor
volume ratios. Pilot-scale systems are currently operated under similar
conditions, suggesting that phosphate removal can be viewed as an
ancillary benefit of electrochemical wastewater treatment, adding
utility to the process without requiring additional energy inputs.
Further value may be provided by designing reactors to recover precipitated
hydroxyapatite for use as a low solubility phosphorus-rich fertilizer.
CITE THIS COLLECTION
DataCite
3 Biotech
3D Printing in Medicine
3D Research
3D-Printed Materials and Systems
4OR
AAPG Bulletin
AAPS Open
AAPS PharmSciTech
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg
ABI Technik (German)
Academic Medicine
Academic Pediatrics
Academic Psychiatry
Academic Questions
Academy of Management Discoveries
Academy of Management Journal
Academy of Management Learning and Education
Academy of Management Perspectives
Academy of Management Proceedings
Academy of Management Review
Cid, Clément
A.; Jasper, Justin T.; Hoffmann, Michael R. (2018). Phosphate Recovery from Human Waste via the Formation
of Hydroxyapatite during Electrochemical Wastewater Treatment. ACS Publications. Collection. https://doi.org/10.1021/acssuschemeng.7b03155
or
Select your citation style and then place your mouse over the citation text to select it.
SHARE
Usage metrics
Read the peer-reviewed publication
AUTHORS (3)
CC
Clément
A. Cid
JJ
Justin T. Jasper
MH
Michael R. Hoffmann