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URN: urn:nbn:de:swb:90-247833

Temperature dependent removal of sodium chloride (NaCl) from synthetic nitrified urine

Huber, Samuel J.

Urine is the source of the major part of plant nutrients in municipal
wastewater. Therefore, full nutrient recovery from source-separated
urine is an attractive option for both treating wastewater and gaining
a valuable fertilizer product. Full nutrient recovery can be achieved
by first stabilizing collected urine by nitrification and then
concentrating the urine by distillation. Since concentrations of all
salts in urine increase with increasing removal of water also the
sodium chloride (NaCl) content is high in the end. There are two
problems related to NaCl, the first being the synergistic
decomposition of ammonium nitrate by chloride and the second being
soil salinity and sodicity related problems when applying the product
as fertilizer. Solubility experiments using synthetic nitrified urine
were carried out in the temperature range between 40 and 90°C. The
synthetic urine solution contained seven inorganic ions at constant
composition (NH4+ , Na+, K+ // NO3- , SO4-- , PO4--- , Cl- - H2O) and
different water contents in order to determine the achievable extend
of NaCl removal. The aim was to find the conditions, ... mehr

Zugehörige Institution(en) am KIT Fakultät für Bauingenieur-, Geo- und Umweltwissenschaften (BGU)
Publikationstyp Hochschulschrift
Jahr 2011
Sprache Englisch
Identifikator KITopen-ID: 1000024783
Umfang VI, 46 S.
Abschlussart Abschlussarbeit - Diplom
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