IER takes pride in being a technically credible wastewater treatment company, not simply a magnesium hydroxide supplier.
For over 20 years, IER has worked with plant engineers and operators to offer the most cost effective solutions for their speciﬁc needs.
This results driven approach is what allows us to work with plant management to determine a minimum amount of calcium required as a feed supplement into the system. With this information, a proprietary blended product was formulated to contain predominantly magnesium hydroxide, with a minor component of calcium hydroxide. In this case, the Ca(OH)2 was formulated at a level sufﬁcient for improved microorganism metabolism and not in an excess to cause an increase in the “inert” solids as was observed with straight lime feed.
This results driven approach is what brought us together with plant management to understand that the incoming wastewater was low in divalent cations (Mg2+ and Ca2+) due to softening of incoming hard water, as well as brine discharge into the wastewater stream (both high in sodium, Na+). As we were already feeding magnesium hydroxide, we were able to determine a minimum amount of calcium required as a feed supplement in order to optimize the microbiological system.
The feed of this blended product, called AMALGAM-55, resulted in improved microorganism activity while not impacting the ratio of Volatile Solids to Total Solids.
The plant has been using AMALGAM-55 for the past 12 years while maintaining the percentage of Volatile Solids in the range of 75-85%, identical to that observed with the use of straight magnesium hydroxide.
In addition, though formulated to contain only 55% total solids, the required dose for AMALGAM-55 to maintain the desired pH and alkalinity was equal to or less than that required for 60% Mg(OH)2.
By combining the lower cost raw material of hydrated lime into the formula, the overall product price for AMALGAM-55 was less per lb than that for straight magnesium hydroxide.