Beijing University of Civil Engineering and Architecture

China Electronics Engineering Design Institute Co., Ltd.

Ziyang Zhang

Haiyan Li

Yan Huang

Zhichao Yang

Xiaoran Zhang

Haijun Zhang

Meipeng Jian

Zhaoying Liu

Chaohong Tan

Jinxi Li

Yingjie Shen

Yuanping Fang

Liyuan Wu

The present invention provides a denitrification and dephosphorization composite filler, a preparation method and application. The composite filler is prepared with a polysulfone polymer as a skeleton and a hybrid denitrification electron donor material by an immersion precipitation phase conversion method. The composite filler designed by the present invention has uniform ball formation and strong controllable performance, solves the problem of poor stability of denitrification and dephosphorization in a system due to the disadvantages of easy system blockage, high consumption speed, weak synergy, etc. in the traditional improved medium, and has broad application prospects in wastewater treatment.

Denitrification and dephosphorization composite filler, preparation method and application

A method for permeable pavement of dirt interception comprises laying a permeable structure layer with a toothed groove between the base layer and the transition surface of the cushion layer or directly setting the upper surface of the cushion layer as a toothed structure; in the base layer, laying at least one layer of dirt interception trough; providing a water-permeable coating or fine sand at the bottom of the sewage interception trough; the present invention traps the dirt between the base layer and the cushion layer that are most likely to cause void blocking in the base layer, close to the shallow part of the surface layer is used to remove dirt by high-pressure flushing operations.

Method and device for dirt intercepting permeable pavement

Growing community of inventors

Beijing, China

Ziyang Zhang