SodaFlexx International, BONTRUP, and Aggregate Industries  accelerate sustainable SOx abatement

SodaFlexx International, BONTRUP, and Aggregate Industries  accelerate sustainable SOx abatement

Press Release – 18 July 2022

The operators of “Bontrup Amsterdam”, BONTRUP, and Aggregate Industries, have contracted the next generation SodaFlexx dry powder exhaust gas cleaning system. This is after the successful  installation on the vessel “Yeoman Bridge.”

The 96,772 dwt “Yeoman Bridge” was equipped with a SodaFlexx dry powder exhaust cleaning system in early 2021, and it has proven to be extremely efficient and cost-effective. The SodaFlexx system allows owners to burn HSFO and treats the exhaust gas with simple NaHCO3 (sodium bicarbonate). At today’s spreads between MGO and HSFO, the “Yeoman Bridge” is saving in excess of $17,000 per day on fuel costs.

“The transition to an emissions-free future might be a serious challenge, but it is also an opportunity for the business to make environmentally responsible strategic decisions and achieve business goals within sustainability targets. BONTRUP’s vision as a worldwide service provider to the maritime & offshore industry is to create new opportunities and innovate with nature. SodaFlexx International represents an outstanding innovation, well balanced in terms of cost-effectiveness and environmental impact. We are pleased to expand our cooperation and enhance our environmental strategy with one of the most promising solutions on the market” – Sipke de Vries, BONTRUP Logistics General Manager.

The absorbent handling and dosing equipment design is based on decades of experience in dry powder handling and ensures that the system doses optimally and safely for the required emissions zone. There are no special construction standards for handling sodium bicarbonate, so no high-alloy steel or unobtainium is required, and all non-proprietary components are off-the-shelf equipment selected for low maintenance operation.


SodaFlexx International has now been contracted for the installation of a dry exhaust gas cleaning system on the 65,402 dwt “Bontrup Amsterdam.” Detailed survey work has been completed, and installation is scheduled for early September 2022 in Poland. All works will take place alongside in 3-5 days and no drydock is required for any SodaFlexx system.

SodaFlexx is also your global partner for sodium bicarbonate delivery and residue disposal and offers supply in most major ports.
“With the maritime industry heavily dependent on oil prices, ship owners are looking for an effective and reliable solution to allow burning of HSFO rather than much more expensive MGO or VLSFO. Burning HSFO with an exhaust gas cleaning system has proven to be less CO2 intensive than using MGO or VLSFO on a “well to wake” basis, and as most engines were designed to burn HFO, maintenance and lubrication protocols are as intended. SodaFlexx provides innovative solutions that are attractive from both economic and environmental perspectives, and we feel that during the transition to alternative fuels, there is still a need to operate the existing fleet in the most sustainable way possible. We are committed to the environment and the sustainable future of the maritime industry” – Sander Castel, SodaFlexx Chief Technical Officer.


The BONTRUP family business creates long-term shared value in a clever way for customers, partners, employees and the company. Our entrepreneurial experts are determined to create high-performing operations, and systematically work to reduce negative impact and enhance positive impacts on people, society and the environment. We innovate with nature to create new opportunities for sustainable infrastructures, offshore developments, logistics and agricultural production. With our company, BONTRUP Logistics, we specialise in the global supply of stone by a bulk carrier. We use our own dedicated, world’s largest self-loading and unloading bulk carriers in the range of 35,000 up to 100,000 DWT. The delivery of many different types of stone using these ships is possible – from aggregates to quarry stone larger than 10 tons. Our bulk carriers ship more than 12 million tonnes of rock products per year. For more information, please visit

About Aggregate Industries

We’re at the frontline of the construction and infrastructure industries, producing and supplying an array of construction materials. With over 200 sites and around 3700 dedicated employees, we’re home to everything from aggregates, asphalt, ready-mixed concrete and precast concrete products. On top of that, we produce import and export supply materials for cement and offer national road surfacing and contracting services.

About SodaFlexx International

SodaFlexx International is an equipment innovator with innovative solutions for exhaust gas cleaning and is presently trialling a Carbon Capture System that will change the way CO2 is captured and treated aboard ocean-going vessels.