Municipal Wastewater & Biosolids

Carmeuse offers a variety of lime-based products, including high calcium quicklime, high calcium hydrated lime, and CALSAFE® lime slurry, for treating municipal wastewater and biosolids. We also provide advanced lime handling equipment, slakers, and service solutions.

Water Treatment Plant

The Importance of Wastewater Treatment

Wastewater and domestic sewage originating from residential, commercial, and some industrial sources can contain a variety of pathogens, pollutants, organic matter, metals, pharmaceutical residues, and other contaminants that require treatment before the water can be safely reused or discharged to bodies of water. Without proper treatment, these impurities can have devastating impacts on waterways, aquatic ecosystems, and public health.

Biochemical Oxygen Demand (BOD) is a measure of the amount of oxygen depleted from water due to the breakdown of organic matter by bacteria. BOD is often used to help determine the effectiveness of municipal wastewater treatment plants, as clean water needs a certain amount of oxygen and carbon dioxide to be present before it can be disposed of safely.

Lime Slaking Systems & Upgrades

Over time, equipment at municipal wastewater treatment facilities may need updated or replaced due to normal wear and tear or for the integration of new technologies. Carmeuse supplies advanced equipment solutions for lime storage, handling, and slaking through our wholly owned subsidiary, Storage & Transfer Technologies (STT).

Our expert engineers can design the right solution to keep your water treatment operation running smoothly, from new lime handling systems and slakers, to retrofits and upgrades for your existing equipment. For additional information related to our lime handling expertise, visit the STT website.

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Lime vs Caustic Soda for Water Treatment

There are a number of considerations to take into account when comparing the use of lime products to the use of caustic soda (sodium hydroxide) in water treatment.

When compared to caustic soda, lime is often the most cost-effective product for use in water treatment plants, as quicklime has a stronger neutralizing capacity per dry ton. Slaked lime is also considered a safer alternative than caustic soda for use in water treatment processes for acid neutralization, pH adjustment. While safety measures are required when handling lime, caustic soda is more corrosive and is extremely hazardous in terms of exposure to the skin and eyes, with the potential to cause chemical burns.

For a thorough comparison on using lime versus caustic soda in water treatment, read our article, Switching to Calcium Products from Caustic Soda.