Choosing the right coagulant is a critical decision for any water treatment facility. The effectiveness of the treatment process, the quality of the finished water, and the overall operational costs are all heavily influenced by this selection. At NINGBO INNO PHARMCHEM CO.,LTD., we often guide our clients through the nuances of different coagulants. Today, we're focusing on a vital comparison: Aluminum Chlorohydrate (ACH) versus Alum (Aluminum Sulfate). Understanding the distinct properties and performance characteristics of each will help you make the most informed decision for your specific needs.

Alum, or aluminum sulfate, has been a workhorse in the water treatment industry for decades. It's relatively inexpensive and widely available, making it an attractive option. Alum functions by neutralizing the negative charges on suspended particles in water, causing them to aggregate into flocs. However, alum's effectiveness is highly dependent on water pH, typically performing best in a slightly acidic to neutral range. It also requires a higher dosage compared to more advanced coagulants and can lead to a significant drop in pH, often necessitating the addition of alkalinity-boosting chemicals. Furthermore, alum typically produces a larger volume of sludge, which increases disposal costs.

Aluminum Chlorohydrate (ACH), on the other hand, represents a significant advancement in coagulant technology. As an inorganic polymer salt, ACH is characterized by its higher molecular weight, increased basicity, and a more concentrated form of aluminum oxide (Al2O3). These properties translate into several key advantages. Firstly, ACH's high cationic charge density allows it to destabilize impurities more effectively, often requiring lower dosages than alum. This reduced dosage directly contributes to lower chemical costs and less residual aluminum in the treated water.

Secondly, ACH exhibits a much broader effective pH range and a lower impact on water alkalinity. This means it can perform efficiently in waters where alum might struggle, and it requires less or no pH adjustment, streamlining the treatment process. This is a crucial factor when considering aluminum chlorohydrate vs alum, especially in waters with naturally low alkalinity. The reduced need for secondary chemicals also contributes to cost savings and simplified operations.

The difference in sludge production is another significant point of comparison. ACH generally produces a more compact and dewaterable sludge compared to the voluminous, gelatinous sludge often associated with alum. This translates into reduced sludge handling and disposal costs, a critical consideration for facilities looking to optimize their environmental and financial performance. Examining the aluminum chlorohydrate applications in sludge reduction highlights this benefit.

In summary, while alum remains a viable option for some applications, ACH offers superior performance across a broader range of conditions, with lower dosages, less pH impact, and reduced sludge generation. For water treatment facilities aiming for higher water quality, greater operational efficiency, and cost savings, investing in ACH is often the more strategic choice. NINGBO INNO PHARMCHEM CO.,LTD. offers a comprehensive range of water treatment chemicals, including high-quality ACH. We are equipped to provide the technical expertise to help you navigate the complexities of coagulant selection and application. Contact us today to discuss your specific water treatment needs and discover how ACH can benefit your operations.