Power consumption of wastewater treatment and the measures of energy saving.

With the rapid increase of waste water treatment practice and the enactment of strict standards,the power consumption in wastewater treatment attracts more and more attention.In this paper,the wastewater discharge and treatment in China are reviewed.General methods and unit components of wastewater treatment are described and the power consumption is analyzed,which warrants a proper design.With an accurate analysis of wastewater volume and components,a proper process of high power efficiency is chosen to avoid the energy waste.Three ways to save power are proposed,that is,an improvement of unit components such as charging pump and aeration system,an improvement of the process flow such as removing the circumfluence,and the development of new techniques and methods of treatment such as constructed wetland wastewater treatment and superconducting high-gradient magnetic separation wastewater treatment.