A novel zero-liquid discharge desalination system based on the humidification-dehumidification process: a preliminary study

Qian Chen, Faheem Akhtar, Muhammad Burhan, M Kumja, Kim Choon Ng

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

As a byproduct of desalination plants, brine is increasingly becoming a threat to the environment, and the design of zero-liquid discharge desalination (ZLDD) systems is gaining increasing attention. Existing ZLDD systems are limited by a high energy intensity and high plant costs of their crystallizers. This study proposes a novel crystallization method based on the humidification-dehumidification (HDH) process, which exhibits the advantages of a low energy consumption, low component costs and a reduced scaling and fouling potential. A simple experimental setup is first designed to demonstrate the feasibility of the proposed system. Brine concentration and salt crystallization are successfully achieved with air heated to 40 ℃ as the heat source. Afterwards, a thermo-economic analysis is conducted for the whole system. The specific thermal energy and electricity consumption levels are found to range from 700-900 and 5-11 kJ, respectively, per kg of feed brine. The energy consumption is 56% lower than that of a conventional evaporative crystallizer, and the initial plant cost is reduced by 58%. Keywords: zero-liquid discharge desalination; crystallization; humidification-dehumidification.
Original languageEnglish (US)
Pages (from-to)117794
JournalWater Research
DOIs
StatePublished - Oct 25 2021

ASJC Scopus subject areas

  • Water Science and Technology
  • Pollution
  • Ecological Modeling
  • Waste Management and Disposal

Fingerprint

Dive into the research topics of 'A novel zero-liquid discharge desalination system based on the humidification-dehumidification process: a preliminary study'. Together they form a unique fingerprint.

Cite this