How to Choose Chemical Additives for Water Treatment in Energy and Mining: Key Parameters and Risks

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In the energy and mining industries, water treatment plays a crucial role – whether for cooling turbines, steam systems, or processing wastewater from mining. Incorrectly chosen chemical additives can lead to corrosion, mineral deposits, or even breaches of legislative limits for discharge. When selecting additives, it is therefore essential to consider not only the chemical composition of the incoming water but also operational temperatures, pressures, and compatibility with equipment materials. This article provides a practical guide on how to evaluate key parameters and avoid costly mistakes.

Why additives for water treatment in energy and mining are essential

In the energy and mining industries, water quality plays a crucial role in ensuring trouble-free equipment operation, extending its service life, and meeting strict environmental standards. Water is used here as a cooling medium, for steam production, equipment cleaning, or as part of technological processes. Without effective additives, mineral deposits, corrosion, microbial growth, and foam formation would occur, leading to reduced efficiency, increased maintenance costs, and the risk of failures.

Typical problems include, for example, scaling in heat exchanger tubes, corrosion of metal parts due to oxygen or aggressive salts, or biological contamination caused by bacteria and algae. Additives such as corrosion inhibitors, dispersants, biocides, or defoamers address these issues in a targeted manner and enable the optimization of operating conditions. The correct choice of additive depends on the composition of the inlet water, operating temperatures, pressures, and the specific requirements of the technology.

Key Parameters for Selecting Additives: What to Monitor

When selecting chemical additives for water treatment, it is essential to consider several technical and legislative parameters. The first step is analyzing the inlet water—its hardness, pH, content of dissolved salts, organic substances, and microbiological contamination. Based on this data, it is possible to determine whether an additive for softening, oxygen removal, or pH control is needed. Operating conditions are also important: temperature, pressure, and water flow rate, which affect the effectiveness and stability of the additive.

Another key criterion is compatibility with equipment materials. Some additives may react with metals, plastics, or seals, leading to their degradation. For this reason, it is necessary to verify the chemical resistance of construction materials to the selected additive. Equally important are safety and environmental harmlessness – additives must comply with REACH and CLP regulations, be biodegradable, and must not burden wastewater. Last but not least, the economic aspect, i.e., the price-to-performance ratio, should be considered.

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Risks associated with incorrect additive selection

An incorrectly chosen additive can cause serious operational problems that may only become apparent after a prolonged period. A typical example is an undersized corrosion inhibitor that fails to protect metal surfaces from aggressive substances, leading to pipe or heat exchanger perforation. Similarly, an unsuitable dispersing agent can cause the deposition of undissolved particles, which reduces flow and cooling efficiency.

Another risk is the incompatibility of the additive with other chemicals used in the system. For instance, combining certain biocides with defoamers can result in the formation of undesirable by-products or reduce the effectiveness of both substances. Environmental risks include the contamination of wastewater or soil, which may lead to penalties from regulatory authorities. Therefore, it is essential to conduct regular water quality checks and monitor additive effectiveness, ideally in collaboration with the supplier, who can provide technical support and laboratory analyses.

How to Choose a Reliable Supplier of Additives for the Energy and Mining Industries

When selecting a supplier of chemical additives, it is crucial to assess their expertise, technical support, and ability to tailor products to the specific needs of the customer. A reliable supplier should offer comprehensive services, including analysis of incoming water, design of an optimal solution, and regular monitoring of additive effectiveness. Transparency is also important—the supplier should provide detailed technical data sheets, safety data sheets, and certificates of compliance with applicable standards.

Another factor is the flexibility of deliveries and logistical support. Energy and mining operations often require rapid delivery of large volumes, so it is advantageous to work with a supplier that has sufficient stock levels and a distribution network. Equally important are references from existing industry customers, which confirm the reliability and quality of the supplied products. Finally, long-term cooperation should also be considered – the supplier should be able to respond to changes in technology or legislation and offer innovative solutions.

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Cost optimisation: How to balance price and performance of water treatment additives

In the energy and mining industries, the costs of chemical additives for water treatment often represent a significant portion of operational expenses. The key to efficiency is not just finding the lowest price, but understanding the total cost of ownership (TCO). For example, corrosion inhibitors with a higher initial price can save long-term maintenance costs for pipelines and equipment if their efficiency reaches 95% or more at lower dosing concentrations (typically 5–20 mg/l). Similarly, dispersants that reduce scale formation can extend heat exchanger cleaning intervals by 30–50%, which compensates for their higher purchase price.

When comparing supplier offers, it is necessary to consider not only the price per kilogram of the product but also the recommended dosage, stability of efficiency under various operating conditions (pH 5–9, temperatures 20–90 °C), and compatibility with other chemicals used. For example, chlorine dioxide-based biocides may require lower doses than traditional hypochlorite preparations, but their effectiveness is sensitive to the presence of organic substances in the water. It is recommended to conduct pilot tests under real conditions for at least 3–6 months to objectively evaluate the economic efficiency of individual solutions.

Technical Support and Analysis: Why Collaboration with the Supplier Matters

Selecting the right water treatment additive for the energy and mining industries often requires more than just the supply of the product itself. A reliable supplier should provide comprehensive technical support, including analysis of incoming water quality, design of an optimal dosing regimen, and regular monitoring of effectiveness. For example, in cooling systems, it is critical to track parameters such as corrosion inhibitor concentration, biological contamination levels (ATP tests), or the amount of suspended solids. Without this data, dosing cannot be effectively managed, and overdosage or insufficient protection can be avoided.

An important part of the collaboration is also training personnel in the safe handling of chemicals, interpretation of analytical results, and troubleshooting operational issues. For example, in the event of a sudden increase in corrosion, it may be crucial to quickly identify the cause (change in pH, increased chloride content, microbial activity) and adjust the dosage of additives. Suppliers with their own laboratories and experienced application technicians can provide rapid response and minimize downtime. Ideally, the supplier should also offer services such as regular water treatment system audits or assistance in preparing documentation for inspections (e.g., in compliance with REACH requirements or local environmental regulations).

Sustainability and Environmental Aspects of Additive Selection

In the energy and mining industries, increasing emphasis is placed on sustainability and minimizing the environmental impacts of operations. When selecting water treatment additives, it is therefore necessary to consider not only their effectiveness but also their ecological profile. For example, phosphate-based corrosion inhibitors are highly effective, but their use may be restricted due to the risk of eutrophication in water bodies. Alternatives include phosphate-free inhibitors based on organic compounds (e.g., carboxylates or phosphonates), which are more biodegradable and place less strain on the environment.

Another critical factor is the toxicity of additives to aquatic organisms. Biocides based on glutaraldehyde or DBNPA (2,2-dibrom-3-nitrilopropionamide) are effective against microorganisms, but their residues in discharged water can harm aquatic ecosystems. Solutions include biodegradable biocides (e.g., based on peracetic acid) or physical disinfection methods (UV radiation, electrolysis). When selecting a supplier, it is advisable to verify whether they offer products with certifications such as Ecolabel or that meet wastewater discharge requirements according to applicable regulations. It is also important to assess the overall carbon footprint of the supply chain—local suppliers can reduce emissions associated with transportation and better respond to specific customer requirements.

Need Help Choosing?

Every application requires an individual approach – that is why we provide detailed technical data sheets and safety data sheets (SDS) in accordance with REACH and CLP regulations for each raw material. Our experts will help you select additives tailored to your operational conditions and legislative requirements. Contact us – or browse our catalogue of over 1,300 products.