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This paper expounds the background and significance of the national standard of the development on the minimum allowable values of energy efficiency and energy efficiency grades for submersible pushing-flow agitator and rotary aerator in wastewater treatment, and introduces the general principle of the standard, the determination of the minimum allowable values of energy efficiency, the division of the energy efficiency grades for them, as well as the testing and calculation methods. It hopes to eliminate the production of the high energy consumption sewage treatment equipment, and enhance their level of the energy efficiency effectively through development and implementation of the national standard.

The operation performance evaluation of municipal wastewater treatment plants is an extremely important and complex issue in the management of wastewater treatment plants. Based on constructing the operation performance evaluation index system of the municipal wastewater treatment plant in China, according to the characteristics of the analytic hierarchy process (AHP) and the data envelopment method (DEA), a comprehensive evaluation model combining AHP/DEA was established to evaluate the operation performance of the municipal wastewater treatment plants in China. AHP/DEA comprehensive evaluation model fully considers the subjective and objective factors with effectiveness and scientific nature.

This paper introduced the development and research advance of the submersible pushing-flow agitator for sewage treatment at home and abroad. By analyzing four factors affecting the energy efficiency of the submersible pushing-flow agitator, the energy efficiency evaluation method and calculation formula of the submersible pushing-flow agitator for sewage treatment in China are analyzed and discussed in this paper.