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Polyaluminum chloride(PAC) plays an important role in municipal sewage treatment.

2025-01-08
Author: YuXinHuan® WhatsApp: +86 19037152650 Email:xinhuan@xhwtm.com Web: www.xhflocculant.com

 

Ⅰ. The basic characteristics of polymeric aluminum chloride

Polyaluminum chloride(PAC) is an efficient inorganic polymer coagulant, with adsorption, coagulation, precipitation and other properties. Its color is diverse, including white, light yellow, golden yellow, brown and so on, which mainly depends on the production process and raw materials. The salinity, pH value and alumina content of Polyaluminum chloride are important indicators of its quality. The salinity is closely related to the flocculation effect, the pH value affects its dissolution and reaction performance in water, and the alumina content directly reflects the active ingredient of the product.

Packaging-1    Drinking-water-grade-Polyaluminum-Chloride-5  Drinking-water-grade-Polyaluminum-Chloride-7

Ⅱ. Application of polymeric aluminum chloride in municipal sewage treatment

  1. Purification of water quality: polymerized aluminum chloride can quickly precipitate and coagulate municipal sewage in the suspended solids, colloids, organic matter and bacteria and other small particles, so that it is aggregated into a larger precipitate, so as to effectively remove the turbidity, chromaticity, suspended solids, algae and organics in the water and other impurities. This characteristic makes polymerized aluminum chloride become an indispensable water treatment agent in municipal sewage treatment.
  2. Deodorization and decolorization:Polyaluminum chloride has strong chlorine adsorption ability, which can remove the odor and stench of municipal wastewater, and at the same time, it also has certain removal ability for the color of some organic matter. This makes polymerized aluminum chloride in the need to improve the water quality of the sensory characteristics of the occasion outstanding performance.
  3. pH adjustment: Polyaluminum chloride is a kind of acidic salts, can be in the municipal wastewater treatment process to adjust the pH value, so that it is in the appropriate range. This property helps optimize the effectiveness of subsequent treatment processes and improves overall water treatment efficiency.
  4. Promote sludge settlement: as an important flocculant, polymerized aluminum chloride can improve the settlement performance of sludge in municipal wastewater treatment plants and improve the efficiency of wastewater treatment.
  5. Reduce pollutant indicators: polymerized aluminum chloride can effectively reduce the municipal sewage chemical oxygen demand (COD), biological oxygen demand (BOD) and suspended solids (SS) and other pollutants, help to improve the water quality.

 

III. Precautions for use

  1. Dosage: the dosage of Polyaluminum chloride should be adjusted according to the specific water quality of municipal sewage. Too little dosage may lead to poor treatment effect, while too much dosage may increase the treatment cost.
  2. Dissolving and stirring:before use, solid aluminum chloride should be dissolved into a certain concentration of solution, in order to quickly play a role in the effectiveness. When dissolving, it should be stirred well to ensure that the powder is fully dissolved. Inadequate stirring or agglomeration may affect the use of performance.
  3. pH adjustment: Although the pH range of polymerized aluminum chloride is wide, in some cases it is still necessary to adjust the pH value to improve the treatment effect. For example, when municipal sewage is strongly acidic or alkaline, acid and alkaline agents should be added to adjust.
  4. Use with other agents: Aluminum chloride can be used with other water treatment agents such as polymer coagulants, silicate flocculants, etc. to optimize the water treatment effect. The flocculation speed and flocculation efficiency can be further improved by adjusting the ratio and dosing order of the agents.

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