Calcium
Carbonate Packed Electrochemical Precipitation
Column: New Concept of Phosphate Removal and Recovery
Posted on 2019-08-23 - 20:16
Phosphorus (P) is a vital micronutrient
element for all life forms.
Typically, P can be extracted from phosphate rock. Unfortunately,
the phosphate rock is a nonrenewable resource with a limited reserve
on the earth. High levels of P discharged to water bodies lead to
eutrophication. Therefore, P needs to be removed and is preferably
recovered as an additional P source. A possible way to achieve this
goal is by electrochemically induced phosphate precipitation with
coexisting calcium ions. Here, we report a new concept of phosphate
removal and recovery, namely a CaCO3 packed electrochemical
precipitation column, which achieved improved removal efficiency,
shortened hydraulic retention time, and substantially enhanced stability,
compared with our previous electrochemical system. The concept is
based on the introduction of CaCO3 particles, which facilitates
calcium phosphate precipitation by buffering the formed H+ at the anode, releases Ca2+, acts as seeds, and establishes a high pH
environment in the bulk solution in addition to that in the vicinity
of the cathode. It was found that the applied current, the CaCO3 particle size, and the feed rate affect the removal of phosphate.
Under optimized conditions (particle size, <0.5 mm; feed rate,
0.4 L/d; current, 5 mA), in a continuous flow system, the CaCO3 packed electrochemical precipitation column achieved 90 ±
5% removal of phosphate in 40 days and >50% removal over 125 days
with little maintenance. The specific energy consumptions of this
system lie between 29 and 61 kWh/kg P. The experimental results demonstrate
the promising potential of the CaCO3 packed electrochemical
precipitation column for P removal and recovery from P-containing
streams.
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
Lei, Yang; Narsing, Santosh; Saakes, Michel; van der Weijden, Renata D.; Buisman, Cees J. N. (2019). Calcium
Carbonate Packed Electrochemical Precipitation
Column: New Concept of Phosphate Removal and Recovery. ACS Publications. Collection. https://doi.org/10.1021/acs.est.9b03795
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 (5)
YL
Yang Lei
SN
Santosh Narsing
MS
Michel Saakes
Rv
Renata D. van der Weijden
CB
Cees J. N. Buisman