A zero liquid discharge system integrating multi-effect distillation and evaporative crystallization for desalination brine treatment

Chen, Qian, Burhan, Muhammad, Shahzad, Muhammad Wakil, Ybyraiymkul, Doskhan, Akhtar, Faheem Hassan, Li, Yong and Ng, Kim Choon (2021) A zero liquid discharge system integrating multi-effect distillation and evaporative crystallization for desalination brine treatment. Desalination, 502. p. 114928. ISSN 0011-9164

[img]
Preview
Text
1_s2.0_S0011916420316064_main.pdf - Published Version
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

Download (1MB) | Preview
Official URL: https://doi.org/10.1016/j.desal.2020.114928

Abstract

With growing global desalination capacity, brine from desalination plants has become an environmental threat to the ecosystems. One sustainable method for brine treatment is to develop zero liquid discharge systems that completely convert seawater into freshwater and salts. This paper presents a zero liquid discharge system, which consists of multi-effect distillation and evaporative crystallization, to treat desalination brine with a salinity of 70 g/kg. A thermodynamic analysis is firstly conducted for the proposed system. The specific heat consumption, specific heat transfer area, and Second-law efficiency are found to be 600–1100 kJ/kg, 110–340 m2/(kg/s), and 10–17%, respectively. The heat consumption can be effectively reduced by increasing the number of MED stages, while the specific heat transfer area decreases significantly with higher heat source temperatures. Based on the thermodynamic performance, a techno-economic analysis is conducted for the proposed system, and the specific cost is calculated to be $4.17/m3. Cost reduction can be achieved via employing cost-effective heat sources, reducing heat consumption, and scaling up the system. By selling the freshwater and salt crystals, the system will be more competitive than other existing brine treatment methods.

Item Type: Article
Uncontrolled Keywords: zero liquid discharge, multi-effect distillation, evaporative crystallizer, yhermodynamic analysis, techno-economic analysis
Subjects: H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 15 Jan 2021 09:50
Last Modified: 15 Jan 2021 10:00
URI: http://nrl.northumbria.ac.uk/id/eprint/45229

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics