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Alkalinity & pH control

A safe and cost effective alternative to the use of sodium hydroxide (caustic soda) or other chemicals for wastewater alkalinity and pH adjustment.

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  •  Is low pH adversely affecting your treatment process ?
  • Trouble with your water and its alkalinity ?
  • Excess usage of lime and caustic soda leading to higher operations and maintenance cost ?
  • Do you have safety concerns with operators handling hazardous chemicals ?

The role of alkalinity in wastewater treatment

Alkalinity can be defined as the ability of a water to neutralize acid or to absorb hydrogen ions. In municipal and industrial wastewater, many factors contribute to alkalinity such as the type of dissolved inorganic and organic compounds present in the water, the amount of suspended organic matter in the water, the presence or absence of free hydroxide alkalinity, the amount of bicarbonate in the water, or the bicarbonate to dissolved CO2 ratio etc.

The ability to strongly buffer wastewater within a desired pH range as it undergoes treatment is crucial to maintaining optimal conditions for microbiological activity and reliable wastewater treatment performance.  Alkalinity is what provides strong pH buffering, which is why it is so important for the wastewater treatment industry.

AMALGAM-60 to stabilise pH and boost alkalinity

AMALGAM-60 (60% Mg(OH)2) has a higher neutralizing value per pound than any other alkaline additive.  This translates into a 40% reduction in chemical usage when compared with caustic soda, while being significantly safer for operators to handle and more nutritive for the microorganisms being maintained – making it the most cost-effective option.

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Key Benefits

High neutralization potential without high pH
Reduced sludge volume making for lower cost disposal
Eliminate sodium discharge issues by substituting for caustic
Safer to handle than traditional neutralization chemicals (Lime and Caustic)



More alkalinity than caustic soda

When an alkaline compound dissolves in water it produces hydroxide ions, OH. These ions are responsible for the alkalinity of the solution.

Because magnesium hydroxide (Mg(OH)2) provides two hydroxides for alkalinity compared to one with NaOH (caustic soda), the usage rate for Mg(OH)2 is much less than that required for NaOH.

Lower cost-per-pound ≠ cheaper

While AMALGAM-60 is typically more expensive then 50% NaOH on a “price per unit” basis, it is significantly less expensive in use – because every 1.0 lb of 50% NaOH can be replaced by 0.6 lbs of 60% Mg(OH)2 to provide the same number of moles of hydroxide (OH) for pH neutralization.

Safer and greener means more savings

Unlike caustic soda, AMALGAM is non-hazardous and non-corrosive, which makes it easier and safer to handle. Spills are not reportable.

Because magnesium is a macronutrient – it is the core element of chlorophyll (makes leaves green!) – it is also beneficial to the environment, while sodium from caustic soda is a salinity hazard.

Magnesium also has coagulation properties that sodium does not. This can result in reduced sludge volume and reduced sludge hauling fees.

Caustic (sodium hydroxide) is strongly irritating and corrosive. It can cause severe burns and permanent damage to skin tissue ⇒

Customer Stories

Improving the Sustainability of Water Treatment \ Food & Beverage
An innovative mixed-metal hydroxide for pH control and wastewater microorganism activity

An innovative mixed-metal hydroxide for pH control and wastewater microorganism activity at a meat processing facility in the United-States.

Improving the Sustainability of Water Treatment \ Municipalities
Hydrogen Sulfide (H2S) in wastewater odor control case study, El Centro

ACTI-Mag reduces the odor to manageable levels at El Centro, Southern California, United-States.

High quality products | Proactive customer service

We take pride in providing high-quality products, technical credibility in the applications of water, process water, and wastewater treatment, dedicated delivery specialists and equipment, and proactive on-site technical service.

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Latest news

October 23, 2020 \ Improving the Sustainability of Water Treatment

A safe, environmentally-friendly, and cost-effective alternative to the use of Sodium Hydroxide (Caustic Soda, NaOH) for wastewater pH and alkalinity control.

September 29, 2020 \ Improving the Sustainability of Water Treatment
pH & Alkalinity – How are they related?

The relationship between pH & alkalinity is intimately connected with the chemistry of the aqueous bicarbonate equilibrium system. 

September 25, 2020 \ Improving the Sustainability of Water Treatment
Introducing John Van Wingerden

John enjoys giving proactive service to his own customers and leads business development of AMALGAM products for the wastewater industry.


Because we truly care about sanitation

Almost 2 billion people do not have a decent toilet or access to basic and safely managed sanitation. In many cases, faeces and urine end up untreated in the environment, contaminating it and threatening people’s health.

This is why IER supports WaterAid programs, to facilitate access to safe water, sanitation and hygiene in the world’s poorest and most marginalized communities.