Chinese
With the development of the construction industry in recent years, the demand for building ceramics has been increasing. In the Foshan area of the Pearl River Delta alone, there are nearly 300 ceramic factories, with over 100 being large-scale, mainly distributed in Foshan, Nanhai, Shunde, and Gaoming. Due to the large volume of wastewater discharged from the ceramic production industry and its high content of suspended solids, the lack of effective control poses a significant environmental threat to the water environment.
Wastewater discharged from ceramic industrial production typically contains a large amount of suspended solids that are difficult to settle naturally. These pollutants mainly come from small-diameter solid particles formed after the raw materials are ball-milled, slurry wastewater washed into drainage ditches after dust settles, and lost clay. Clay in the wastewater is a valuable basic raw material processed through multiple steps; its loss and disposal not only waste resources but also cause serious environmental pollution.
Due to different production processes and products, the composition of wastewater varies, but the most significant pollutant is suspended solids. Large suspended solids can settle under gravity, while fine particles, including suspended solids and colloidal particles, are the root cause of water turbidity. Suspended solids and colloidal particles are largely dispersed in ceramic wastewater, and most can be removed by mechanical filtration. Sludge generated during ceramic production is pumped into a plate and frame filter press, where excess water is removed under pressure to form raw sludge cakes, reducing the moisture content of the ceramic sludge. This allows for the recovery of sludge from the ceramic wastewater, which can then be reused depending on its condition. This also effectively reduces the environmental pollution caused by ceramic wastewater.
