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Natural freeze concentration of wastewater for nutrient recovery

Publiceringsår

2023

Upphovspersoner

John Miia; Semken R. Scott; Mikkola Aki; Häkkinen Antti

Abstrakt

Water and food are vital needs for all humans and animals living on the earth, and intensive crop cultivation that requires plentiful nutrients and water has evolved to meet food production demands. As population grows and the supply of raw material nutrient deposits and clean water begin to run out, effective recycling becomes increasingly important. However, recovering nutrients from urban waste streams is not yet technically or economically feasible. New energy efficient separation technologies are needed to meet the demand. Making use of the colder climates of polar regions is an opportunity to achieve a more efficient and economical transition to a circular economy. Hence, this study focuses on a natural cold-climate freeze concentration technique that enables the recovery of both water and material concurrently in a single process. Experiments were carried out in a winter simulator device using various waste streams originating from landfill and a biogas production plant. Average partition coefficients between 1.5 and 3 for the concentrates and 0.08 and 0.4 for the ice were achieved for different concentrate mass yields with different water quality measures, essential ions, and elements, including harmful metals. These results confirm that freeze concentration is a potential option when developing new technologies that combine water and material reclamation from wastewater towards sustainable circularity.
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Organisationer och upphovspersoner

Lappeenrannan–Lahden teknillinen yliopisto LUT

Mikkola Aki

Semken Scott

Häkkinen Antti Orcid -palvelun logo

Publikationstyp

Publikationsform

Artikel

Moderpublikationens typ

Tidning

Artikelstyp

En originalartikel

Målgrupp

Vetenskaplig

Kollegialt utvärderad

Kollegialt utvärderad

UKM:s publikationstyp

A1 Originalartikel i en vetenskaplig tidskrift

Publikationskanalens uppgifter

Förläggare

Elsevier

Volym

213

Artikelnummer

103943

Publikationsforum

53710

Publikationsforumsnivå

2

Öppen tillgång

Öppen tillgänglighet i förläggarens tjänst

Ja

Öppen tillgång till publikationskanalen

Delvis öppen publikationskanal

Parallellsparad

Nej

Övriga uppgifter

Vetenskapsområden

Teknisk kemi, kemisk processteknik

Nyckelord

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Förlagets internationalitet

Internationell

Internationell sampublikation

Nej

Sampublikation med ett företag

Nej

DOI

10.1016/j.coldregions.2023.103943

Publikationen ingår i undervisnings- och kulturministeriets datainsamling

Ja