Magnesium Hydroxide Wastewater Treatment Precludes Scaling

Scaling occurs when chemistry conditions cause dissolved mineral salts to precipitate and form solid deposits.  Scale is a problem because it narrows pipe widths and therefore compromises treatment system performance and increases the energy used in transporting aqueous flows through pipes, pumps and other conveyance elements.

Wastewater commonly consists of dissolved matter of calcium content in sulfate, chloride, or bicarbonate form – calcium sulfate, calcium chloride, or calcium bicarbonate, respectively.  The primary scale-forming component in wastewater is calcium carbonate which has a solubility of about 15 ppm.  Temperature or alkalinity elevation is often sufficient to decrease the solubility threshold.  At higher temperatures, bicarbonate will decompose to carbonate and can form calcium carbonate scale which consists of tiny crystals called “calcite”.  Scaling happens after the solubility limit of calcium carbonate is attained, and “saturation” is said to occur.

If calcium treatment agents such as lime are used, wastewater will have higher calcium content and will generate increased scaling.

Scaling problems are widespread.  For example, the Kentucky “city’s treatment plant experienced excessive scaling which led to flow interruptions, plugging of lines and pipe fittings, and equipment failures.”  Billions of dollars are lost each year in industry due to lime scaling, leading to corrosion in wastewater infrastructure, downtime and high maintenance costs.

Our FloMag®H Magnesium Hydroxide Slurry is trusted by many of North America’s major corporations for wastewater neutralization, pH adjustment, and alkalinity supplementation by delivering a compelling envelope of technical, economic, and safety benefits.  FloMag®H produced in our ISO-9001 Certified plant is finding increased use in industrial wastewater neutralization, in large part to preclude increased costs and interruptions arising from calcium treatment agent-induced scaling.

Posted: December 19, 2016 | In: Wastewater and Water Treatment

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