Constructed treatment wetland: Glance of development and future perspectives

It has been well recognised that the representative activated sludge process as the principal wastewater treatment technology is not only expensive but requires supervision by technical staff. In line with the need for simple, inexpensive, yet effective methods of wastewater treatment, constructed wetland (CW) is an alternative option and has been increasingly applied for wastewater treatment practice worldwide. The paper provides an informatics glance of the updated development of the CW technology, while some trends and new development including the use of CW for water recycling as irrigation and greywater reuse as well as drinking water source water treatment are discussed. Perspectives of the CW especially in China have been highlighted. Overall, CW provides environmentally friendly solution for water environmental protection, while it owns inherent benefits of aesthetic appearance and wildlife habitats. It is expected that this paper will help to promote this technology in both academic and practical peers. [Display omitted] •Updated CW technology was reviewed.•Use of CW for water recycling as irrigation and greywater reuse was discussed.•Use of CW for source water pre-treatment is highlighted.•Perspectives of the CW especially in China are addressed.