Yangbo Qiu, Sifan Wu, Lei Xia, Long-Fei Ren, Jiahui Shao, Jiangnan Shen, Zhe Yang, Chuyang Y Tang, Chao Wu, Bart Van der Bruggen, Yan Zhao
Papermaking industry discharges large quantities of wastewater and waste gas, whose treatment is limited by extra chemicals requirements, insufficient resource recovery and high energy consumption. Herein, a chemical self-sufficiency zero liquid discharge (ZLD) system, which integrates nanofiltration, bipolar membrane electrodialysis and membrane contactor (NF-BMED-MC), is designed for the resource recovery from wastewater and waste gas. The key features of this system include: 1) recovery of NaCl from pretreated papermaking wastewater by NF, 2) HCl/NaOH generation and fresh water recovery by BMED, and 3) CO2 capture and NaOH/Na2 CO3 generation by MC...
December 2, 2022: Water Research