Wuhan University of Technology Application of New Environmental Ceramics Filter Media in Water & Wastewater treatment Presented By: Dr.Meng Li Wuhan University of Technology

Headlines: The concept of Environmental Ceramics The Current Situation and Application Perspective of Solid Wastes in China The Application of Ceramics Filter media in the Field of Water & Wastewater Treatment

Basic concept & purpose of Environmental Ceramics All (Or almost) of the raw materials come from solid wastes discharged in the Alumina plant New ceramics materials can be widely used in Environmental and Engineering protection

Recycle and Reclamation Basic Design Idea--- Recycle and Reclamation Make use of some available chemical components and mineral structure Make fully use of advanced ceramics processing techniques and equipment Produce a variety of new ceramics materials to meet the needs of environmental protection and water treatment

The mineral components of red grain: Main minerals: Calcite,60-65 % The other components: egg white stone,allophane,acerate iron mine,etc Its mineral components are not only complex, but also not in accord with those of natural clay.

The current plight of red alumina grain: The total number of red grain produced each year is 0.6 billion tons in the world as a whole. 5 million tons red grain generated each year in China Red grain piled up to 40 million tons in China Huge red grain wastes deposit

Harmful red grain pollutants Underground water source and farmland nearby heavily polluted. Lots of farmlands occupied. Underground water basified permanently due to red grain infiltration.

Leading Quality of this sort of ceramics product in china Latest headway-1: Midterm test finished in Shandong Alum Corporation with research investment up to 3 million Yuan. Leading Quality of this sort of ceramics product in china Unique advantage in application of drinking water treatment

Latest headway-2: Capacity of Product line up to 6000 t/y in Shandong Alum Corporation Similar product be developed using solid wastes discharged in Liuzhou iron-steel Corporation

Main properties of our ceramics filter media: ●All of the raw materials come from red clay & coal ash & coal mine stone ●Adjustable ratio of pores 45%-70% ●Specific surface area 1×104cm2/g ● Penetrability coefficient 1.0~4.5cm/s ● Crushing strength 0.779KN ● Average density 0.8~1.8g/cm3

Main advantages of Shandong ceramics filter media in water treatment high capacity for pollutants deposited in the filter media layer highly porous inner structure rational media size distribution Meet the water quality sanitary standard for drinking water

Environmental uses of Shandong ceramics filter media Adsorption for garbage in-leakage Exhaust gas in thermoelectricity construction materials plant

National standard of filter media for drinking water treatment

Experimental process

Keep perfect pollutants removal efficiency in the 70 hr run term Discussion-1 Pollutants deposits distribution tend to be uniform in the whole filter media Keep perfect pollutants removal efficiency in the 70 hr run term

Much longer filter run when ceramics media used compared to sand Discussion-2 Much longer filter run when ceramics media used compared to sand

Less water and electricity needed for backwash Discussion-3 Less water and electricity needed for backwash

Discussion-4 　 Keep stable treated water quality when ceramics filter media used

Process of oily wastewater treatment using Shandong ceramics material polymer bump Coagulation tank Oil separation Air diffuser Preliminary filter Bio-activated carbon Fine filter Bump network