Is liquid or solid polyaluminium chloride better for industrial wastewater treatment?

2025-08-27 09:26 398

‌The decision between using liquid or solid polyaluminium chloride (PAC) in industrial wastewater treatment requires comprehensive consideration of multiple factors, including the specific application scenario, treatment requirements, and cost-effectiveness. The following is a comparative analysis of the advantages and disadvantages of the two forms of PAC for industrial wastewater treatment by Yilisheng:

1. Physical State and Ease of Use:

Liquid PAC: A water-based, chloride-containing polymer that is liquid at room temperature. It is easy to use and requires no additional dissolution process; it can be pumped directly into the treatment system, saving time and labor costs. Furthermore, the liquid form is dust-free, easy to transport, and relatively simple to use and manage.

Solid PAC: A solid, granular material that requires dissolution in water or other liquids before use. This requires transportation, storage, and dissolution, increasing labor, space, and process costs. 2. Treatment Effect and Scope of Application:

Treatment Effect: Both liquid and solid polyaluminum chloride (PAC) operate in similar ways in water treatment. Through the interaction of hydroxyl ion functional groups and polyvalent anion polymerization functional groups, they produce inorganic polymers with high molecular weight and high charge, effectively removing impurities such as suspended solids, heavy metal ions, organic matter, and algae from water. Therefore, there is no significant difference in treatment effect between the two.

Scope of Application: PAC is widely applicable to the treatment of various water sources, including river water, lake water, reservoir water, and industrial wastewater. It is also suitable for various water treatment processes, including conventional treatment, advanced treatment, and emergency treatment.

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3. Cost-Effectiveness:

Transportation and Storage Costs: Liquid polyaluminum chloride requires tank trucks for transportation, resulting in relatively high unit transportation costs (one ton of solid equivalent to 2-3 tons of liquid), and product sales areas may be restricted. Solid polyaluminum chloride, on the other hand, offers greater flexibility in transportation and storage, resulting in lower costs.

Usage Costs: While solid polyaluminum chloride offers lower transportation and storage costs, it requires dissolution before use, increasing labor and time costs associated with the dissolution process. Liquid polyaluminum chloride, on the other hand, eliminates this process, making direct use more convenient and economical.

4. Other Factors:

Safety: High-quality liquid polyaluminum chloride is typically transparent, virtually free of impurities, and relatively less corrosive to equipment and pipelines. Solid polyaluminum chloride, on the other hand, may produce impurities during dissolution, potentially causing blockage or corrosion to equipment and pipelines.

Environmental Impact: Both products may have certain environmental impacts during use, such as secondary pollution from unstable flocculation. Therefore, care should be taken to control usage and emissions during use to minimize environmental impact. The choice between liquid and solid polyaluminium chloride for industrial wastewater treatment requires comprehensive consideration of multiple factors, including the specific application scenario, treatment requirements, cost-effectiveness, and safety. If ease of use and consistent treatment results are desired, and the budget allows, liquid polyaluminium chloride may be a better choice. If transportation and storage costs, as well as the complexity of the dissolution process, are considered, solid polyaluminium chloride is also a viable option. In practical applications, it is recommended to conduct trials and comparisons based on specific circumstances to determine the most suitable treatment solution.

The main products of flocculant manufacturer Xinhuan Water Treatment are:

White polyaluminium chloride (food grade), drinking grade polyaluminium chlorideindustrial grade polyaluminium chlorideanionic polyacrylamidecationic polyacrylamide, nonionic polyacrylamide, petroleum recycling polyacrylamide, oil recovery polyacrylamide, polyacrylamide, polymer flocculant polymer flocculation coagulant, polymeric ferrous sulphate, polyferric aluminium chloride and other water treatment chemicals. Welcome customers to write to us to negotiate business! Tel/WhatsApp:+8619003830067 Email:joanna@xhwtm.com Contact:Joanna

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