Issue 5, 2024

Low-grade waste heat recovery for wastewater treatment using clathrate hydrate based technology

Abstract

Effectively recycling low-grade waste heat is crucial for advancing decarbonization and achieving net-zero emissions, yet current methodologies are limited by inefficiencies in extracting energy from sources with low exergy. This study introduces an innovative approach leveraging hydrate formation and dissociation to utilize low-grade waste heat in purifying wastewater. By directly heating (low-grade waste heat) liquid R134a, our method induces bubble formation, thereby enhancing hydrate nucleation and growth. Our system demonstrates exceptional energy efficiencies, reaching up to 23.5%, and exhibits a high removal efficiency for wastewater with high concentrations of organic and heavy metal contaminants, including methylene blue (86.4%), Cr3+ (98.0%), Ni2+ (98.3%), Zn2+ (98.0%), and Cu2+ (97.1%). This approach not only offers a sustainable pathway for waste heat utilization but also addresses critical challenges in wastewater treatment. This technology demonstrates substantial potential in both low-grade waste heat recovery and wastewater treatment.

Graphical abstract: Low-grade waste heat recovery for wastewater treatment using clathrate hydrate based technology

Supplementary files

Article information

Article type
Paper
Submitted
06 Nov 2023
Accepted
22 Jan 2024
First published
24 Jan 2024
This article is Open Access
Creative Commons BY-NC license

Sustainable Energy Fuels, 2024,8, 1048-1056

Low-grade waste heat recovery for wastewater treatment using clathrate hydrate based technology

L. Sun, A. Hassanpouryouzband, T. Wang, F. Wang, L. Zhang, C. Cheng, J. Zhao and Y. Song, Sustainable Energy Fuels, 2024, 8, 1048 DOI: 10.1039/D3SE01440A

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