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Calix Newsletter - Issue 30 - February 2019

Welcome to Issue 30 of the Calix Newsletter.


Dr Phil Hodgson - Calix Managing Director & CEO

We at Calix hope you all had a great Christmas, New Year and Lunar New Year!


With our LEILAC Project drawing to end-of-construction in Lixhe, Belgium, we look forward with great anticipation to commissioning the pilot in April, on-time and on-budget. Our special sustainability report focuses on CO2 emissions reduction, and hopefully helps explain why we are so excited by the LEILAC Project and its potential in the cement and lime industries to help curb emissions, and why this is a technology that is coming into its own at the right time for Calix.


With the hot summer months in Australia, we also devote this newsletter to our products and R&D that may be particularly topical here. The production of rotten egg gas from sewers and waste waters increases with temperature, and its effects on sewer infrastructure and also potentially human health are significant. We have introduced a new formulation for PROTECTA-Mag to make it even more durable in protecting vital sewer assets. We also cover our freshwater lake remediation project in Kuala Lumpur at its half-way mark – even more topical given the recent news of the Darling River fish kills in Australia due to nutrient run-off causing blue-green algae and loss of dissolved oxygen. We are progressing as fast as we can on developing this solution – it is clearly needed.


We look forward to 2019 in what will be an important year in our development. In addition to the LEILAC Project delivery, we will work on the completion of our new advanced battery materials facility, continue to expand our Asian business in Aquaculture and biogas, continue to pursue our US market entry in sewer and waste water treatment, develop our project in health and pharmaceuticals, and look for other new applications for this versatile, unique platform technology.


We wish you all the very best for the New Year and thank you for your support and interest in Calix.

Work continues on the LEILAC Project, with the silo now being installed next to the tower at HeidelbergCement Lixhe plant in Europe

A great start of the year for the AQUA-Cal team at the Shrimp Masters Conference in China (Zhuhai) with our partner Honlex Jones - Exchanging ideas on the latest technologies & trends on aquaculture, the fastest growing food-producing sector.





After outlining six sustainability challenges over the next decade, this series
will dive deeper into each of these challenges in a dedicated special feature.


Click Here to Read





The structure at HeidelbergCement’s Lixhe, Belgium, cement plant is largely complete and the electrical and control systems work is well underway. We are looking forward with great anticipation to starting the LEILAC reactor in April!


The LEILAC tower with the new control room in the foreground







The wet well before application

After application, the new PROTECTA-Mag formula adhering well to the walls

With a constant flow from 2 other pump stations, a sewer pump station at North East Water had suffered a significant amount of acid damage, with its concrete surface visibly pitted.


Calix coated the asset with the new formulation of PROTECTA-Mag, which allows better control of hardening time and improves adherence to the concrete walls. The new formulation proved very resistant to wear in flowing / splashing conditions. The application of PROTECTA-Mag involved no confined space entry and no network shutdown. PROTECTA-Mag prevents corrosion by raising surface pH, which neutralises acids and inhibits the formation of acid-producing bacteria.


Picture 1 - The wet well before application.

Picture 2 - After application, the new PROTECTA-Mag  adhering well to the walls.



Calix's ACTI-Mag Product | Waste Water ManagementHYDROGEN SULPHIDE



Highly toxic, hydrogen sulphide (H2S) gas can be produced in large quantities in animal farms, industrial plants, sewers or sewage treatment plants, and has a distinctive and unpleasant rotten egg smell causing frequent odour complaints.


H2S gas is a consequence of anaerobic mechanisms at low pH which favour sulphate reducing bacteria (SRB), and results in the generation of this poisonous "rotten egg" gas in sewers.


People can usually smell hydrogen sulphide at very low concentrations in the air, ranging from 0.0005 to 0.3 parts per million (ppm). There is no way to tell whether concentrations of hydrogen sulphide are low or high by smell alone.


In fact, very hazardous concentrations (>100ppm) will temporarily eliminate ability to smell the gas. You should not rely on your nose to evaluate possible H2S danger!


Hydrogen sulphide levels can change based on a number of factors such as fluctuations from the source, or from changes in weather patterns.


In general, low pH and high temperature tend to favour evaporation of hydrogen sulphide, putting people and infrastructure at higher risks.


Odorous emissions from wastewater treatment plants (WWTPs) can create a nuisance for surrounding neighbourhoods. As population increases, houses are being built closer to WWTPs, with buffer zones around WWTPs that offer protection from unwanted odours decreasing. In many councils around
Australia, there is a growing pressure to control odorous emissions.


Emissions of odorous compounds increase during the summer months, not only because of increased H2S volatility (evaporation) but also because of an increase in anaerobic bacterial activity, as oxygen is less soluble at higher temperatures.


It is recommended that plant operators measure H2S more regularly in the summer months, and step up odour control measures, such as dosing ACTI-Mag magnesium hydroxide, which keeps the pH high and stops the formation of H2S from dissolved sulphides.




Hydrogen Sulfide Reduction Chart






Taman Tasik Aman. PJ. Kuala Lumpur


With the recent dreadful fish kills in the Darling River, the general public are becoming starkly aware of the dangerous impact of high fertliser water run-off into water systems with little drainage or flow-through.


Calix’s AQUA-Cal+ is being tested as a key remediation treatment for a recreational lake in Kuala Lumpur that suffered fish kills, blue-green algal blooms and bad odours. We are nearly 12-months into a two-year trial with our local partners MahaChem and Thalassa Aqua.


Treatment with AQUA-Cal+ began in April, 2018, and has resulted in the elimination of the odour, and there has been no evidence of fish kills since the beginning of the project. Water quality has greatly improved, and with AQUA-Cal+ as the cornerstone of the treatment regime, the blue-green algae has been controlled
while maintaining good DO (dissolved oxygen) making this lake usable once again for the local people.


In addition to treating the symptoms of an unhealthy system, AQUA-Cal+ is also being assessed on its ability to help reduce the accumulated sludge (more than 1 metre deep), via aiding bio-digestion in the lake bottom, after years of accumulation and ineffectual probiotic treatment. If the sludge digestion progresses well, AQUA-Cal+ will have made a significant contribution to the longer-term health of the lake ecosystem.


Lake condition – February 2018

Lake condition – February 2018

Lake condition – January 2019

Lake condition – January 2019

Watch this space for data on sludge depth readings as the
project moves toward its two-year conclusion.


The Economist

How to get the carbon out the industry


Australian Medicine

Global connections fund granted for work on new pathway for treatment of diseases


The Sustainability Report

Calix identifies six sustainability challenges impacting clients


Council Leader

How the right manhole rehabilitation can extend lifespan and reduce maintenance costs

Audrey Barucchi - Calix Marketing Communications ManagerINTRODUCING



Audrey joined Calix in 2012 and is responsible for all marketing and communication activities including developing Calix's brand, customer relationship management, public relations, and events. Together with the Business Development and sales teams, she supports the development and implementation of sales and marketing plans for Calix's business units.


Audrey graduated with a Master of Business from SKEMA, a top ranked European Business School, and followed an MBA Program at the prestigious Indian Institute of Management. She started her career in Asia where she worked in finance, procurement and setting up the first Hong Kong office for one of the leaders in luxury packaging.

She landed in Australia in 2008 where she joined the global group Bouygues Construction as a Marketing Manager for the Ductal (Ultra-High Performance Fiber-Reinforced Concrete) division. She then became the National Marketing Manager for Douglas Partners, an Australian leader in geotechnical engineering before she joined the Executive Management Team at Calix.


Outside of work, Audrey is a certified yoga and prenatal yoga instructor. She is also the proud mum of two bubbly young children.