Simultaneous urea and phosphate recovery from synthetic urine by electrochemical stabilization

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F23%3A00574005" target="_blank" >RIV/61389013:_____/23:00574005 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/2077-0375/13/8/699" target="_blank" >https://www.mdpi.com/2077-0375/13/8/699</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/membranes13080699" target="_blank" >10.3390/membranes13080699</a>

Result language

angličtina

Original language name

Simultaneous urea and phosphate recovery from synthetic urine by electrochemical stabilization

Original language description

Urine is a widely available renewable source of nitrogen and phosphorous. The nitrogen in urine is present in the form of urea, which is rapidly hydrolyzed to ammonia and carbonic acid by the urease enzymes occurring in nature. In order to efficiently recover urea, the inhibition of urease must be done, usually by increasing the pH value above 11. This method, however, usually is based on external chemical dosing, limiting the sustainability of the process. In this work, the simultaneous recovery of urea and phosphorous from synthetic urine was aimed at by means of electrochemical pH modulation. Electrochemical cells were constructed and used for urea stabilization from synthetic urine by the in situ formation of OH- ions at the cathode. In addition, phosphorous precipitation with divalent cations (Ca2+, Mg2+) in the course of pH elevation was studied. Electrochemical cells equipped with commercial (Fumasep FKE) and developmental (PSEBS SU) cation exchange membranes (CEM) were used in this study to carry out urea stabilization and simultaneous P-recovery at an applied current density of 60 A m−2. The urea was successfully stabilized for a long time (more than 1 month at room temperature and nearly two months at 4 °C) at a pH of 11.5. In addition, >82% P-recovery could be achieved in the form of precipitate, which was identified as amorphous calcium magnesium phosphate (CMP) by using transmission electron microscopy (TEM).n

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Membranes

ISSN

2077-0375

e-ISSN

2077-0375

Volume of the periodical

13

Issue of the periodical within the volume

8

Country of publishing house

CH - SWITZERLAND

Number of pages

11

Pages from-to

699

UT code for WoS article

001055248300001

EID of the result in the Scopus database

2-s2.0-85169021923