Boron removal and recovery via vacuum assisted air gap membrane distillation-crystallization (VAGMD-C): A pilot-scale study

Oyku Mutlu-Salmanli, Anil Kazak, Turker Turken, Mehmet Emin Pasaoglu, Bihter Zeytuncu, Ismail Koyuncu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Boron is an essential element that is widely used in many industries. Due to its importance, it is beneficial to recover boron from water streams. The concentrate stream contains high boron content and is the major obstacle for membrane processes, due to its high salinity and contaminant content. Since membrane distillation (MD) can be used successfully to treat highly concentrated waters, the pilot scale vacuum-assisted air gap MD (VAGMD) unit was investigated in this study and boron removal efficiency from raw water and RO concentrate was evaluated. This operation was carried out with different recovery ratios through flow rate, conductivity, pressure and removal efficiencies and presented in this study. After the VAGMD operation the crystallization process was applied and up to 43.9 % B2O3 concentrated boron crystals were obtained.

Original languageEnglish
Article number116229
JournalDesalination
Volume547
DOIs
Publication statusPublished - 1 Feb 2023

Bibliographical note

Publisher Copyright:
© 2022

Funding

This study was supported by the ETI Mine General Directorate-Emet Boron Works , Kutahya (Turkey).

FundersFunder number
ETI Mine General Directorate-Emet Boron Works

    Keywords

    • Boron recovery
    • Crystallization
    • Pilot scale
    • Vacuum-assisted air gap membrane distillation

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