Innovative & environmentally friendly

Making wastewater treatment safer, more sustainable & economical.

About ACTI-Mag

Calix’s ACTI-Mag is a safe, cost-effective and environmentally friendly solution for wastewater treatment.

It is non-hazardous, non-toxic and has low solubility. This makes it perfect for acid neutralisation and hydrogen sulphide gas (H2S) control in sewers, while maintaining water quality for downstream use.

Produced using Calix’s platform technology, ACTI-Mag is a safe and cost-effective alternative to the use of sodium hydroxide (caustic soda) and lime for wastewater alkalinity and pH adjustment.

Magnesium hydroxide provides more CaCO3 equivalent alkalinity on an equal weight basis when compared with caustic soda, delivering significant cost savings from lower chemical consumption.

Magnesium hydroxide is also non-hazardous and non-corrosive, making handling safer and easier.

The opportunity

Water and wastewater management threatens vital waterways, with potential negative consequences for human health and the environment.

Effective management of our water and wastewater helps to protect freshwater systems, our oceans and human health by preventing detrimental pathogens, nutrients and other types of pollution from entering the environment.

There is a global imperative for every nation to contribute to smarter, more effective water treatment.

Our solution

Calix’s ACTI-Mag provides a safe, effective, economical and sustainable solution for the treatment of water and wastewater.

Magnesium hydroxide is the least expensive and most powerful alkaline chemical treatment available on the market for pH control applications.

Key features & benefits

Odour & H₂S control

ACTI-Mag offers a safe and cost-effective strategy for managing odour, unlike other agents, which can be costly, potentially hazardous, and target a single issue. Hydrogen sulphide is present due to anaerobic activity, which favours sulphate reducing bacteria (SRB) and results in the generation of a poisonous rotten egg gas called H2S.

Alkalinity & pH adjustment

ACTI-Mag provides more CaCO3 equivalent alkalinity on an equal weight basis when compared with hydrated lime and caustic soda, lowering chemical consumption. Unlike caustic soda, ACTI-Mag is non-hazardous and non-corrosive, and even beneficial to the environment, while sodium is a salinity hazard.

Caustic soda (sodium hydroxide) replacement

ACTI-Mag is significantly less expensive than caustic soda because every 1.0 kg of 50% NaOH can be replaced by 0.6 kgs of 60% Mg(OH)2 to provide the same number of moles of hydroxide (OH-) for pH neutralisation.

Fats, oils & greases control

Higher concentration of Fats, Oils and Greases (FOGs) can lead to the formation of fat bergs, scamming, pump blockages, pipe restriction and pipe blockage, in addition to the formation of odour related issues like hydrogen sulphide gas (H₂S). ACTI-Mag is a safe and environmentally friendly solution for FOGs in wastewater.

Phosphorus removal

To meet environmental standards, phosphorus – usually in the form of phosphates – has to be treated and reduced from wastewater before it is discharged into a local water body or land irrigation. With a chemistry similar to the antacids used in human digestive systems, Calix can safely and cost-effectively remove phosphate from municipal and industrial wastewater.

BOD/COD reduction

Calix can help reduce the organic component in wastewater streams. Reducing Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD) means sewage will support the growth of less bacteria and effluent will be better able to infiltrate tight soils.

Active monitoring services

Calix has developed robust, field ready H2S and pH monitoring solutions to allow continuous performance tracking, as well as sewer network dosing optimisation.

Integrated supply chain

Calix's magnesite (magnesium carbonate) is mined and calcined in-house. Vertically integrated manufacturing means better service, reliability and performance.

Calix is certified ISO 9001:2015 for process development, manufacture, delivery and application of mineral based products.

How it works

ACTI-Mag is a concentrated and stabilised suspension of magnesium hydroxide (also known as milk of magnesia).

It is produced using Calix’s platform technology, which creates unique nanoporous materials with enhanced chemical and bioactivity.

Chemical dosing in wastewater treatment is the controlled delivery of chemicals into the process stream either to adjust and maintain the pH, reduce hydrogen sulphide odours, prevent corrosion of sewer assets, or remove undesirable elements, such as phosphorus or fats, oils and grease.

Calix’s standard dosing systems are a compact, reliable solution for making magnesium hydroxide liquid dosing simple and easy. ACTI-Mag has proven to flow easily in most dosing systems.

ACTI-Mag’s pH peaks at 10.3 and buffers in the solution between 8.5 and 9. The MHL dissolves slowly over time with particles remaining in suspension for as long as needed.

The results from this study indicate that porous micron-sized particles produced from hydrated, high surface area MgO powders have great potential for beneficial application in agriculture as a new, non-lethal, and non-toxic active for the suppression of plant pathogens.

Andreadelli et al. Microorganisms 2021, 9(6), 1217

The results from this study indicate that porous micron-sized particles produced from hydrated, high surface area MgO powders have great potential for beneficial application in agriculture as a new, non-lethal, and non-toxic active for the suppression of plant pathogens.

Andreadelli et al. Microorganisms 2021, 9(6), 1217

Case study

A preferred solution for odour control

ACTI-Mag Magnesium Hydroxide liquid dosing helped solve H₂S odour issues along the pristine Cassowary Coast Region of Queensland, Australia.

Sustainable Development Goals

Water sits at the heart of sustainable development.

Clean water and sanitation are a universal human right and underpin all economic development, poverty reduction and environmental sustainability.

Calix’s safe and sustainable products for water and wastewater management reduce pollution and minimise the release of hazardous chemicals and materials into our water systems.

Contact us Calix Limited

Make your wastewater treatment safer, more sustainable & economical.

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ACTI-Mag: request a quote

You could be making cost-savings and gaining other benefits by switching to ACTI-Mag. Request a quote today.

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