How We Close The Loop

Resources are scarce and valuable. We aim to maximize the re-use of nutrients in the food chain and utilize their renewable energy potential. We cooperate with local partners to deliver technology for building sustainable and state-of-the-art organic waste treatment facilities and enable our partners to become the best operator. We use our advanced global experience to push boundaries and apply the best available technology to reduce greenhouse emissions.


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Why We Offer Solutions

Because we care. Because we can. We inspire and empower communities to close the loop for a sustainable future for our children. We give resources new life!

Closing the Loop for a Better Future™

What We Do

We design state-of-the-art and sustainable facilities, we deliver advanced technology to build facilities, and we provide customer support, so your facility keeps running in the most efficient way. Our biological processes build on extensive know-how and years of experience. We can control the entire project and operation cycles to help our customers avoid costly duplications, suboptimal technological solutions and maintain consistent uptime. Our solutions combine quality, creativity and technological expertise to craft a plan that is tailor-made to your specific needs. A one stop solution.

Our History

Our history begins in 1996, where our founders shared one simple goal: to design, build and maintain waste recovery and recycling projects around the world. Right from the start Waste Treatment Technologies (WTT) was characterized by innovative designs and functionality.  In 2007 the development of anaerobic digestion opened a realm of possibilities for WTT. During this time, WTT closed various large contracts as a turnkey supplier of aerobic and anaerobic technologies.  In 2013 WTT was acquired by Convent Capital, a long-term Dutch investor that focuses on buying and improving sustainable businesses. Over the next few years, they worked closely together to focus their strategy on services, operational excellence and project sales. In 2014 WTT landed its first Canadian project in cooperation with Orgaworld (later named Renewi). Together they were awarded a contract to Design Build and Operate an organic waste facility for the City of Surrey, British Columbia. This became the first closed-loop organic waste facility in Surrey, a milestone for the waste industry and working towards a sustainable future for all.  In 2019 Convertus was created by the merger of Renewi Canada and WTT.  Convertus North America has a focus on operating facilities, while WTT Netherlands delivers knowledge, technology and customer support.  With 120 projects installed worldwide, we have the expertise to design, build, finance and operate any type of organic waste treatment facility.

Our World, Our Responsibility

We understand that our activities can have an impact on the communities we operate in. Our goal is to always act in partnership with the local communities around our sites. We aim to be a responsible partner by minimizing the impact of our sites on the environment that we share with nearby residents, community organizations and businesses. We have been delighted to work with a growing number of community groups who share our commitment.

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Building a more sustainable world means giving back and growing together.

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