On the basis of investigation,this p aper analyses the necessity and feasibility of trial implementation of t he flexible schooling system and credit system i n secondary vocational schools.

The effluent quality reaches the design requirements after several months of commissioning and operation,and some of the water quality index are superior to the design standard.

This paper outlines of wastewater treatment plant for the first phase project of Caofeidian Dock; states the commissioning and operation status of Sequencing Batch Bioreactor integrated with fiber balls filtering process.

Commissioning and operation of the first phase project in Jiuzhaigou Zhangzha Wastewater Treatment Plant;