Water treatment and reuse is the key strategy to address the problems of water shortages. To facilitate communication and application of technology and research in water reclamation, the National Conference on Water Treatment and Reuse of China was held annually from 2017 by the Committee of water treatment and reuse, Chinese society for environmental sciences.
The theme of the 5th conference was water recycling and low-carbon development. The conference, held from April 16th to 18th in 2021, brought together researchers working in different areas related to water treatment and reuse from China, USA, Australia, Ireland and many other countries and regions. More than 12,00 researchers from universities, institutes and companies attended the conference.
The conference covered 20 main topics:
Physical separation theory and technologies
Chemical transformation theory and technologies
Biological purification theory and technologies
Natural treatment theory and technologies
Water treatment theory and technology based on microalgae
Chemical risk and control
Disinfection and microbial risk control
Standard and risk control of reclaimed water environment reuse
Reclaimed water storage and reuse
Water quality detection and water characteristic research methods
Standards and policy for water quality control and water resource management
New materials, reagents, and equipment for water treatment
Design and intelligent operation of water treatment process
Urban water system and water recycling
Industrial water system and water recycling
Rural water system and water recycling
Pollution control and utilization of rainwater runoff
Water environment constructing and regional water recycling
Watershed environment remediation and water recycling
Desalination technology and processes
In this special issue of Water Reuse, 10 papers that focus on cutting-edge technology and system for water treatment and reuse, were selected among papers presented at the 5th National Conference on Water Treatment and Reuse of China. This special issue is sponsored by CSCEC Scimee Sci. & Tech. Co., Ltd to cover the article processing charges.
Each of these 10 papers focuses on a certain link of water reclamation and reuse, together forming the entire chain of treatment-distribution-detection-utilization. The first six articles focus on water treatment and risk control. Zhou et al. (2021) investigate the performance and mechanism of organic pollutants degradation in a photoelectrochemical system. Yin et al. (2021) study the removal efficiencies and mechanism of atrazine degradation by peroxymonosulfate activated with CuCo2O4 nano-particles. Hu et al. (2021) present a study on diatrizoate degradation by ozone and the formation of disinfection byproducts in the sequential chlorination. Yi et al. (2021) investigate the effect of commercial probiotics immobilized by various carriers on the remediation of aquaculture water and sediment. Yu et al. (2021) design a powder-activated carbon pre-coating membrane unit as a pretreatment for ultrafiltration system to alleviate membrane fouling and improve performance. Ren et al. (2021) investigated the efficiency of micro-flocculation as a pretreatment approach in alleviating ultrafiltration membrane fouling caused by organic matters in treated wastewater.
Further, two articles are related to distribution and water quality monitoring. Xu et al. (2021) report the effects of five pipe materials on water quality deterioration of reclaimed water produced by reverse osmosis process in large pilot-scale distribution systems by long-term running tests. Mao et al. (2021) propose a potential rapid and simple method for bacterial detection in water by excitation-emission matrix (EEM) fluorescence spectroscopy.
Lastly, two articles provide new insights to water recycling and watershed environment remediation. Liu et al. (2021) study the effects of mixed irrigation using brackish water and reclaimed water on a soil-crop system. Jiang et al. (2021) analyze the effects of large-scale compound ecological engineering system on pollution control of the estuary of a lake.
This special issue deals with various problems and investigates different treatment technologies concerning water reuse. In response to the challenges of severe water shortages and the deterioration of water quality, the focus of cutting-edge technology and system for water treatment and reuse is fast-growing worldwide. Progress is needed to provide high quality reclaimed water, minimize the risks to environment and human health, and support use of non-conventional water resources.