Current challenges of hydrothermal treated wastewater (HTWW) for environmental applications and their perspectives: A review

Muhammad Usman; Zhijian Shi; Nalok Dutta; Muhammad Awais Ashraf; Bushra Ishfaq; Mohamed Gamal El-Din

doi:10.1016/j.envres.2022.113532

Current challenges of hydrothermal treated wastewater (HTWW) for environmental applications and their perspectives: A review

Environ Res. 2022 Sep;212(Pt D):113532. doi: 10.1016/j.envres.2022.113532. Epub 2022 May 23.

Authors

Muhammad Usman¹, Zhijian Shi², Nalok Dutta³, Muhammad Awais Ashraf⁴, Bushra Ishfaq⁵, Mohamed Gamal El-Din⁶

Affiliations

¹ Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 2W2, Canada; Bioproducts, Sciences and Engineering Laboratory (BSEL), Washington State University, Tri-Cities, Richland, WA, 99354, United States; Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China; Shanghai Technical Service Platform for Pollution Control and Resource Utilization of Organic Wastes, Shanghai, 200438, China. Electronic address: musman4@ualberta.ca.
² Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai, 200433, China; Shanghai Technical Service Platform for Pollution Control and Resource Utilization of Organic Wastes, Shanghai, 200438, China.
³ Bioproducts, Sciences and Engineering Laboratory (BSEL), Washington State University, Tri-Cities, Richland, WA, 99354, United States.
⁴ State Key Laboratory of Multiphase Complex Systems, CAS Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, PR China.
⁵ Food Technology Section, Post-harvest Research Center, Ayub Agricultural Research Institute, Faisalabad, Pakistan.
⁶ Department of Civil and Environmental Engineering, University of Alberta, Edmonton, AB T6G 2W2, Canada. Electronic address: mgamalel-din@ualberta.ca.

PMID: 35618004
DOI: 10.1016/j.envres.2022.113532

Abstract

Hydrothermal treatment (HT) is an emerged thermochemical approach for the utilization of biomass. In the last decade, intense research has been conducted on bio-oil and hydrochar, during which extensive amount of hydrothermal treated wastewater (HTWW) is produced, containing large amount of organic compounds along with several toxic chemicals. The composition of HTWW is highly dependent on the process conditions and organic composition of biomass, which determines its further utilization. The current study provides a comprehensive overview of recent advancements in HTWW utilization and its properties which can be changed by varying different parameters like temperature, residence time, solid concentration, mass ratio and catalyst including types of biomasses. HTWW characterization, parameters, reaction mechanism and its application were also summarized. By considering the challenges of HTWW, some suggestions and proposed methodology to overcome the bottleneck are provided.

Keywords: Characteristics of HTWW; Hydrothermal treatment; Hydrothermal wastewater; Utilization of HTWW.

Publication types

Review
Research Support, Non-U.S. Gov't

MeSH terms

Biofuels*
Biomass
Catalysis
Temperature
Wastewater*

Substances

Biofuels
Waste Water