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


Mutlu Salmanlı Ö., Kazak A., Türken T., Paşaoğlu M. E., Zeytuncu B., Koyuncu İ.

Desalination, vol.547, 2023 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 547
  • Publication Date: 2023
  • Doi Number: 10.1016/j.desal.2022.116229
  • Journal Name: Desalination
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, Environment Index, Food Science & Technology Abstracts, INSPEC, Metadex, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, Civil Engineering Abstracts
  • Keywords: Boron recovery, Crystallization, Pilot scale, Vacuum-assisted air gap membrane distillation
  • Istanbul Technical University Affiliated: Yes

Abstract

© 2022Boron 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.