Guide to Selection of Solid and Liquid Polyaluminum Chloride
Release time: 2026-01-05
Guide to Selection of Solid and Liquid Polyaluminum Chloride
The choice between solid and liquid polyaluminum chloride (PAC) primarily depends on transportation distance, storage conditions, application scenarios, and budget constraints. Each type offers distinct advantages in performance, operational ease, and cost-effectiveness. Below is a detailed comparison and selection guide:
- Core Differences Between Solid Polyaluminum Chloride (PAC) and Liquid Polyaluminum Chloride (PAC)
Contrast dimension | Solid polyaluminum chloride | liquid polyaluminum chloride |
Active ingredient content | High, generally 28%~32% | Low, generally 10%~15% |
transportation cost | Compact and lightweight with equivalent active ingredients | High, with high water content, large transportation volume, and prone to leakage |
Storage requirements | Store in a cool, dry place. Shelf life: 6–12 months. Not prone to spoilage. | Seal tightly and protect from light. Shelf life: 3-6 months. Hydrolizable and stratified. |
Operation | The preparation requires dissolution to form a solution, involving multiple steps and necessitating the use of dissolution and stirring equipment. | It can be added directly or diluted before addition, with simple operation and no need for dissolution. |
applicable scene | Industrial/municipal water treatment requiring long-distance transportation, high consumption, and long-term storage | Close procurement, small volume, and rapid on-site dosing scenarios |
composite cost | High unit price but low cost per ton of water treatment | Low unit price but high cost per ton of water treatment |
II. Core Recommendations for Model Selection
1. Priority Selection of Solid Polyaluminum Chloride
The distance between the procurement site and the usage site is relatively far, or long-distance transportation is required: the small volume and light weight of the solid can significantly reduce transportation costs, and it is less likely to leak during transportation.
Water treatment involves large-scale operations with high consumption: such as large-scale wastewater treatment plants and industrial circulating water systems. These systems feature high solid active ingredients, lower chemical costs per ton of water, and extended storage periods, enabling bulk procurement and inventory preparation.
The site is equipped with dissolution and mixing facilities, including dedicated dissolution tanks and mixers, capable of handling the initial dissolution process.
2. Priority Selection of Liquid Polyaluminum Chloride
The proximity between procurement and usage sites enables short-distance transportation, thereby avoiding the risks of leakage and high costs associated with long-distance liquid transport.
Small-scale water treatment scenarios or emergency response: such as wastewater from small-scale livestock farms, laboratory wastewater, and emergency treatment of sudden water quality pollution. The liquid can be directly added without complex dissolution steps, ensuring high operational efficiency.
Lack of dissolution equipment or personnel at the site: For example, small township water plants and decentralized wastewater treatment stations without accompanying stirring devices, making liquids more manageable.
3. Special Precautions
Prolonged storage of liquid polyaluminum chloride may cause stratification. Thorough mixing is required prior to use to ensure optimal treatment efficacy.
When dissolving solid polyaluminum chloride, the dosing rate and stirring intensity should be controlled to prevent clumping, and the dissolution concentration is recommended to be maintained at 5%~10%.
III. Summary
-Pursuit of cost-effectiveness, long-distance transportation, and large-scale water treatment → Selection of solid polyaluminum chloride.
-Pursuit of operational convenience, short-distance use, and small-scale/emergency water treatment → Selection of liquid polyaluminum chloride.
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