Glass production enterprises are large consumers of water. They need a large amount of water resources in the industries of melting kiln cooling, steam production with waste heat and compressed air production by air pressure mechanism. In China's glass industry, it is common to discharge glass manufacturing wastewater directly without treatment. Although the water quality of these waste water relative to the chemical industry pollution is light, but because of its large emissions, and the discharge of waste water contains oil, SS, fluorine and heavy metals and other pollutants, these pollutants to the natural environment and human harm is serious, so the glass factory waste water must be treated before discharge.

Glass deep processing wastewater is characterized by large amount of water, high concentration of glass powder, and difficult biochemical degradation. In addition, there are some additives and oils in the water, so the wastewater is mostly acidic.

Glass wastewater is mainly inorganic materials, are the loss of raw materials, can be reused, does not affect the quality of products. A small amount of precipitating agents can be added to treat glass wastewater, such as polyaluminum chloride, polyacrylamide, etc. Polyacrylamide manufacturers, especially polyacrylamide, can be very good to flocculate and precipitate suspended solids, and then filter after precipitation. There are also some glass manufacturers will waste water to ceramics factories as water reducing agent.

In the treatment of glass wastewater generally choose the content of 30%-33% of polyaluminum chloride, polyaluminum chloride with high content of polyacrylamide price can quickly precipitate its suspended matter, iron, fluorine, arsenic and bacteria in the water have strong adsorption removal effect.

For the selection of polyacrylamide, glass factory generally uses higher molecular weight anionic polyacrylamide, because the suspended particles in glass wastewater is more complex, high molecular weight polyacrylamide has stronger adsorption, treatment of the wastewater flocculation settlement speed, flocculation large characteristics.

The treatment effect of anionic polyacrylamide and polyaluminum chloride is better, with less input and obvious effect. It can achieve the sewage treatment effect more quickly, that is, reduce the production cost of enterprises and greatly improve the sewage treatment capacity.

Polyacrylamide flocculation precipitation is the process of flocculation precipitation of particulate matter in water. After adding coagulant in water, the colloids and dispersed particles of suspended matter form flocculent under the interaction of molecular force, and they collide with each other and coagulate in the sedimentation process, its size and mass continuously increase, and the sedimentation rate keeps increasing. The removal rate of suspended matter depends not only on precipitation rate but also on precipitation depth. The alum formed by adding coagulant to the surface water, the organic suspended matter in domestic sewage and the activated sludge will flocculate and precipitate in the process of precipitation.