Electrodialysis-based zero liquid discharge in industrial wastewater treatment

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F19%3AN0000080" target="_blank" >RIV/28676092:_____/19:N0000080 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.2166/wst.2019.161" target="_blank" >https://doi.org/10.2166/wst.2019.161</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2166/wst.2019.161" target="_blank" >10.2166/wst.2019.161</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Electrodialysis-based zero liquid discharge in industrial wastewater treatment

Popis výsledku v původním jazyce

Over the past few decades, reverse osmosis (RO) has been the dominant technology employed in zero liquid discharge (ZLD) systems for industrial wastewater treatment. However, RO is limited to a maximum operating salinity of about 75 g/kg. Electrodialysis (ED) is a potentially attractive option as it can achieve much higher concentrations, thereby reducing the capacity and energy demand of the subsequent evaporation step. Feed-and-bleed experiments were undertaken on a laboratory-scale ED stack using a series of model solutions based on the most common inorganic salts with the aim of determination maximum achievable concentrations. In addition, a straightforward review of how ED incorporation can affect ZLD process economics is presented. The maximum salt concentration achievable via ED ranged between 104.2 and 267.6 g/kg, with levels predominantly limited by water transport. The operational cost of an ED-based ZLD system for processing RO retentate was almost 20% lower than comparable processes employing high-efficiency RO and disc tubular RO. As the ED-based ZLD system appears economically preferable, and as maximum achievable concentrations greatly exceeded RO operating limits, it would appear to be a promising approach for bridging the gap between RO and evaporation, and may even eliminate the evaporation step altogether.

Název v anglickém jazyce

Electrodialysis-based zero liquid discharge in industrial wastewater treatment

Popis výsledku anglicky

Over the past few decades, reverse osmosis (RO) has been the dominant technology employed in zero liquid discharge (ZLD) systems for industrial wastewater treatment. However, RO is limited to a maximum operating salinity of about 75 g/kg. Electrodialysis (ED) is a potentially attractive option as it can achieve much higher concentrations, thereby reducing the capacity and energy demand of the subsequent evaporation step. Feed-and-bleed experiments were undertaken on a laboratory-scale ED stack using a series of model solutions based on the most common inorganic salts with the aim of determination maximum achievable concentrations. In addition, a straightforward review of how ED incorporation can affect ZLD process economics is presented. The maximum salt concentration achievable via ED ranged between 104.2 and 267.6 g/kg, with levels predominantly limited by water transport. The operational cost of an ED-based ZLD system for processing RO retentate was almost 20% lower than comparable processes employing high-efficiency RO and disc tubular RO. As the ED-based ZLD system appears economically preferable, and as maximum achievable concentrations greatly exceeded RO operating limits, it would appear to be a promising approach for bridging the gap between RO and evaporation, and may even eliminate the evaporation step altogether.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20402 - Chemical process engineering

Projekt

<a href="/cs/project/LO1418" target="_blank" >LO1418: Progresivní rozvoj Membránového inovačního centra</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Water Science and Technology

ISSN

0273-1223

e-ISSN

—

Svazek periodika

neuveden

Číslo periodika v rámci svazku

květen

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1580-1586

Kód UT WoS článku

000474351200016

EID výsledku v databázi Scopus

2-s2.0-85067449622