With the acceleration of industrialization, sewage discharge has become a major issue in global environmental protection. The core of sewage treatment lies in the selection and use of flocculants in the purification process. In recent years, high-efficiency polyaluminum chloride (PAC), as an important flocculant, has gradually become a “star product” in the sewage treatment industry due to its excellent performance and wide application prospects.
Polyaluminum chloride is an inorganic polymer compound with strong flocculation effect. It is obtained by the polymerization reaction of aluminum chloride and aluminum hydroxide under specific conditions. Compared with traditional aluminum salt flocculants (such as aluminum sulfate, aluminum salt coagulant, etc.), high-efficiency polyaluminum chloride has a stronger ability to remove pollutants, especially when dealing with high turbidity and heavy oil pollution. The performance is particularly outstanding when it comes to water quality. It has been widely used in many fields such as municipal sewage treatment, industrial sewage treatment, and domestic sewage treatment.
Advantages of high-efficiency polyaluminum chloride
1. The flocculation effect is remarkable
High-efficiency polyaluminum chloride can quickly form a large number of fine flocs in water, thereby effectively adsorbing suspended solids, colloidal substances and microorganisms in the water. It can quickly adsorb and remove suspended particles, grease, heavy metal ions and other pollutants in water. Especially when dealing with complex water quality, the effect is far superior to traditional aluminum salt flocculants. In sewage treatment, high-efficiency polyaluminum chloride can increase the settling speed of the sedimentation tank in a short time, thus greatly shortening the sewage treatment cycle.
2.Wide range of application
High-efficiency polyaluminium chloride can adapt to a variety of water quality conditions, including high turbidity water, high oily sewage, water containing heavy metals, and low-temperature low-turbidity water, showing strong adaptability. It can efficiently remove most suspended solids and pollutants in water, and can be widely used in sewage treatment in different fields such as municipal administration, industry, and mining. For example, in domestic sewage treatment, pulp mill wastewater, metallurgical wastewater, food industry wastewater and other scenarios, high-efficiency polyaluminum chloride can achieve excellent treatment results.
3. Low dosage, high efficiency and energy saving
High-efficiency polyaluminium chloride is designed to achieve less dosage and better flocculation effect. The dosage for low-turbidity is 25-40% of the aluminum sulfate, and the dosage for high-turbidity is 10-25% of the aluminum sulfate. This not only reduces the cost of using chemicals, but also reduces energy consumption and sludge in the sewage treatment process. Due to its low aluminum residue, it reduces secondary pollution of water bodies and greatly reduces the overall cost of sewage treatment. Therefore, it has become an important tool to save costs and improve efficiency in practical applications.
4. Environmentally friendly
The use of high-efficiency polyaluminium chloride has less impact on the environment and low aluminum residue. Compared with other chemical flocculants, polyaluminium chloride is safer and has less impact on the pH and TA of the effluent, so the demand for chemicals to adjust pH and TA is reduced. Especially in large-scale sewage treatment and environmental protection projects, it has become a greener and more environmentally friendly choice.
5. Suitable for low temperature and high turbidity water treatment
Water treatment in low-temperature seasons is a common challenge. Especially in cold winter, the effectiveness of many traditional flocculants will be greatly reduced. However, high-efficiency polyaluminum chloride can continue to maintain high flocculation effect under low-temperature conditions. In addition, when the water turbidity is high, PAC also shows strong processing capabilities and can effectively remove suspended particles and colloidal substances in the water. For water with heavy oil pollution, high-efficiency polyaluminum chloride also has a very good degreasing effect.
6. Adapt to different pH value ranges
High-efficiency polyaluminium chloride has strong adaptability to changes in water pH and can effectively function in a wide pH range. Generally speaking, PAC can maintain good flocculation effect in water with lower (acidic) or higher (alkaline) pH value, which further expands its applicability under various water quality conditions. 5.0-9.0 vs 5.5-7.5
7. Improve sedimentation efficiency and reduce sludge volume
High-efficiency polyaluminum chloride helps accelerate the settlement of solid particles in sewage and improves the working efficiency of the sedimentation tank by improving the density and settleability of flocs. In addition, due to the high degree of polymerization of high-efficiency polyaluminum chloride, the flocs formed are tighter and settle faster, thus reducing the amount of sludge produced. This is of great significance for subsequent sludge treatment and disposal, and can reduce the cost and difficulty of sludge treatment.
Application examples of high-efficiency polyaluminum chloride in wastewater treatment
1. Municipal sewage treatment
In the field of municipal sewage treatment, high-efficiency polyaluminum chloride can be widely used in the pretreatment and secondary treatment stages of water plants. It can effectively remove suspended solids, colloidal substances, bacteria and other microorganisms in the water, improve water quality, and provide a higher quality water source for subsequent biological treatment. PAC has become one of the mainstream flocculants in sewage treatment plants in many cities at home and abroad.
2.Industrial wastewater treatment
In the field of industrial wastewater treatment, high-efficiency polyaluminum chloride is also widely used. It has good treatment effect on industrial wastewater from printing and dyeing, papermaking, leather, electroplating and other industries, and can effectively remove pollutants such as color, COD and BOD. For example, in metallurgy, electric power, chemical industry, papermaking, food processing and other industries, PAC can help remove heavy metals, oil stains, suspended particles and other pollutants in water. Especially when treating oily wastewater, PAC has shown its excellent oil removal ability and can significantly reduce the oil content of water bodies.
3. Mining wastewater treatment
In the field of mining wastewater treatment, high-efficiency polyaluminum chloride can effectively remove minerals, sediment and other suspended matter in the water, providing support for water recycling and ecological restoration in mining areas. Since the water quality in mining areas is complex and usually contains a large amount of suspended solids and heavy metals, the high efficiency of high-efficiency polyaluminum chloride is particularly outstanding in this type of wastewater treatment.
In general, high-efficiency polyaluminum chloride, as an excellent flocculant for sewage treatment, has significant technical and environmental advantages. Especially in the case of high turbidity, complex water quality, and heavy oil pollution, it can achieve more excellent treatment effects.
Post time: Dec-19-2024