Industrial Wastewater Treatment with Magnesium Hydroxide Significantly Reduces Sludge

Wastes generated from industrial processes can be unpredictable, inconsistent and highly variable. Acidic industrial wastes are commonly neutralized with alkalis.

The addition of alkalis alters the concentrations of dissolved and suspended solids, facilitating their separation by sedimentation. Sedimentation is the separation of solid particles from water by gravitational settling.

In industrial wastewater treatment, the volume of sludge produced is a function of what neutralization agent is used. For example, calcium-based agents are particularly prodigious in sludge creation from sulfate-based wastewaters. Caustic soda typically produces gelatinous sludge that does not dewater easily.

A time-lapse, visual demonstration comparing relative sludge creation resulting from various chemical agents can be viewed at 1:24 in the 5-minute video in the left sidebar at

Our metal products fabrication case study identified large reductions in sludge volume by using magnesium hydroxide in wastewater treatment. As much as 50% sludge reduction resulted in significant cost savings for this company. Copy of this case study is available upon request.