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Advantages of polyaluminum chloride in industrial wastewater treatment

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Industry News

2021-12-06

Polyaluminum chloride is widely used in wastewater treatment across various sectors, particularly in industrial wastewater treatment. Industrial wastewater is generated in large quantities and is highly polluting. It can only be discharged after being treated to meet the relevant emission standards. Polyaluminum chloride can be used to treat a wide range of industrial effluents, thereby helping to protect the environment.

So, what kind of wastewater is suitable for polyaluminum chloride? Polyaluminum chloride can be widely used to treat industrial wastewater generated in various industrial processes, such as metallurgical wastewater, paper-making wastewater, dyeing and printing wastewater, electroplating wastewater, and chemical wastewater. It can also effectively treat wastewater with high concentrations of heavy metals, such as iron and lead. Moreover, polyaluminum chloride exhibits strong capabilities in oil removal, decolorization, and COD reduction.

In industrial wastewater treatment, polyaluminum chloride is typically produced using the roller-drying method, with a polymerization degree ranging from 26% to 30%. This type of polyaluminum chloride not only exhibits excellent treatment performance for industrial wastewater but also boasts a relatively low price, allowing for large-scale use and cost savings. Polyaluminum chloride demonstrates high efficiency in treating industrial wastewater and is easy to use. It has low corrosivity, resulting in minimal corrosion of pipelines and equipment. Industrial wastewater treated with polyaluminum chloride is more likely to meet the relevant discharge standards.

Coagulants used in wastewater treatment are widely applied in the wastewater treatment industry; commonly used ones include polyaluminum chloride and polyacrylamide. In particular, products such as polyaluminum chloride and polyacrylamide significantly influence the flocculation and settling rates of wastewater, and are extensively employed in the treatment of domestic sewage, chemical wastewater, and industrial wastewater.

Polyaluminum chloride is a primary raw material used in the treatment of wastewater from oil extraction; polyacrylamide is a versatile chemical agent for oilfield applications. In oil extraction, it is used as an oil-displacement agent, water-blocking and flow-control agent, drilling-fluid conditioner, and fracturing-fluid additive. Soil crusts form on the soil surface and are characterized by high density, small pore sizes, and low saturated hydraulic conductivity. They impede the infiltration of soil moisture, increase surface runoff, and inhibit seed germination. Polyacrylamide can increase soil moisture content, suppress crust formation, and enhance water infiltration.

Aluminum chlorohydrate has a significant effect on the flocculation and sedimentation of wastewater from daily chemical production. In addition, white polyaluminum chloride is a water-purification flocculant product belonging to the class of polymeric aluminum chlorides. It can also be used as a raw material or additive in the pharmaceutical, cosmetic, and beauty industries.

How does polyaluminum chloride turn red?

1. The red color of polyaluminum chloride may be caused by iron ions present in the product, which is why it appears red. In general, its quality is primarily determined by the content of aluminum oxide. The higher the aluminum oxide content, the better the performance of the polyaluminum chloride.

2. However, polyaluminum chloride also contains iron and magnesium ions, which can affect its performance in practical applications. Practice has shown that a higher iron content is beneficial for the flocculation and sedimentation effects of polyaluminum chloride. Moreover, in water treatment, it plays a significant role in promptly treating wastewater.

Although the polyaluminum chloride has turned red, its quality and effectiveness remain unchanged. Therefore, its application performance cannot be judged by the naked eye; rather, it must be evaluated based on the actual results obtained after implementation. The reddish color also indicates that the product contains a higher concentration of iron ions, which significantly enhance its effectiveness in water treatment.

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