Engineering Design of Production Wastewater Pretreatment for Ultrathin Glass Substrate Deep Processing Project
The construction scale of wastewater treatment engineering is 17800 m3/d,introduced the overview of treatment engineering,process flow,and process design of main structures.In the expected inflow composition of this project,industrial wastewater accounts for a considerable proportion,mainly composed of electronic wastewater.The biodegradability of wastewater is poor,and the difficulty of wastewater treatment is significant.Efficient hydrolysis processes are used for pre-treatment to reduce the toxicity of industrial wastewater,improve the biodegradability of wastewater,and ensure the stable operation of the secondary treatment system.The main process of wastewater treatment is recommended to use a two-stage AO process with longer sludge age,delayed aeration,and enhanced denitrification to improve the removal rate of difficult to degrade organic matter.The vast majority of incoming water has strong acidity or alkalinity,and the fluctuation range of acidity and alkalinity is large,which can easily impact the wastewater treatment process and cause significant corrosion to wastewater treatment buildings.A regulating tank with a long residence time is set at the inlet of the wastewater treatment station to uniformly regulate the incoming water,which can to some extent keep the pH value of the wastewater within a relatively stable range.A monitoring discharge tank is set up at the wastewater treatment station,and there is still a possibility of emergency pH adjustment before tail water discharge to ensure that the tail water meets the discharge standards.Through technical and economic comparison,it is proposed to adopt the process technology roadmap of combined treatment of different types of wastewater by quality in this expansion project,improve processing efficiency and reduce construction and operating costs.And the hydrolysis reaction tank type adopts advanced upflow hydrolysis sludge bed,covered with deodorization and landscape greening,collect and treat odors inside structures.
国家科技期刊平台
NSTL
万方数据
维普
