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Facility performance often declines over time. Inefficiency, unnecessary energy use, odor complaints and substandard compost quality are all examples of underperforming facilities. In addition, new insights and innovations can increase the efficiency of the installation. We are servicing organic waste treatment facilities worldwide and focus on continuous improvement and optimization. Together with our clients we aim to maximize output and minimize operational expenditures. In addition, we train and educate staff, so our clients can be the best operators and keep their bioprocesses running.

Our Solutions

To manage a waste treatment facility, you need to be able to adapt to changing conditions. Waste composition, gate fees, personnel, equipment wear and regulations can all dramatically change a site’s business model. 

We are proud to provide high-level customer support at more than 50 facilities worldwide. Our goal is to keep your facility performing optimally and to prevent emergencies or downtime. We think ahead. In addition, we can provide upgrades that future-proof your facility by reducing greenhouse gas emissions and maximize nutrient re-use.

Project Services

Projects Services are defined on a yearly basis and are intended to help grow facility performance. This start with controlling the operation, when you have control you can optimize and when you have done everything right you can even exceed your performance.


  • Spare Parts Management
  • Revamp or Overhaul
  • Asset Maintenance
  • Site Organization
  • Safety & Documentation
  • Maintenance Management System


  • Process Optimization
  • Odour Performance
  • Biological Service


  • Energy Performance
  • Heat Harvest
  • Innovation


Service Level Agreement

With a WTT Service Level Agreement we offer continuous support for your facility. We know what to do when conditions are changing or equipment is failing. We are available to make sure that downtime is prevented or minimized and our team of professionals can answer almost any question.

In addition to our Service Level Agreement, WTT offers customized services that are aimed at increasing the year-by-year performance of your site.

Service Level Agreement

Standard Support

Service Level Agreement Plus

Standard Support + Additional Services Below

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Plant Audit

Our service team comes onsite to perform an audit on your equipment to determine their state of maintenance and recommend solutions for improved operational performance.

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Remote Process Support

From the WTT control room our team proactively monitors the plant’s performance. By analyzing trends and data we can advise on potential improvements.

Process Audit

WTT’s Process Specialists visit your site and suggest the proper recipe according to your waste characteristics and fine tune the software parameters for efficient biological process.

Alert Service

The WTT team can be on stand-by when you need it the most. Our professionals can answer incoming alerts and provide support.

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Helpdesk & Emergency Support

Our engineers are available to provide you with the right support, to make sure your plant is up and running as soon as possible.

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Every facility is unique and can require specific knowledge and experience for best operations. We visit facilities worldwide and train new and existing operators to improve their level of know-how.

Contact us to learn more information about each individual service offered or to request a quote.

is our promise.

Combine services to maximize
output and minimizing expenditures.

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“For us it is very important to control our operational expenses. In cooperation with WTT we can maximize the running efficiency of the facility and we can produce and manage the waste much better, which gives us a financial gain“

Matthew Piotrowski

Operations Manager, Veolia Southwark

Project Results

Research shows that 90% of facilities are underperforming. We are constantly working on innovative solutions and upgrades to optimize performance, reduce costs, and improve quality to maximize the re-use of nutrients and reduce greenhouse gas emissions.

Nanaimo Canada

The Nanaimo Composting facility in Canada lost over €60,000 a year in leachate disposal costs. A single €200,000 investment in a smarter aeration floor cut the cost overnight by 90%. The story gets even better with significantly higher throughput, lower maintenance costs, and lower power consumption.


Nanaimo Composting used a traditional aerated floor in its maturation bays. Air flows into the bays through ditches in the floor. Though this system is common in open windrow composting and bio-drying plants worldwide, it doesn’t live up to standards. Inconsistent airflows lead to insufficient evaporation of water. As a result, the Nanaimo Composting facility lost over €60,000 a year in leachate disposal costs. What a waste…


WTT replaced the traditional floor with a high-pressure spigot floor. The entire system is automatically controlled and only requires a cleaning procedure of ten minutes before the start of a process cycle. Systems like this can be installed relatively simply in 4 weeks’ time with little impact on the running process.


  • Typical investment of €50,000 per tunnel or bay.
  • Leachate disposal cost reduction of 90%.
  • Throughput increase of >10%.
  • Power consumption and maintenance costs decrease by >10%.

Gottingen Germany

Odour abatement systems are at the core of each organic waste treatment facility. The buildings are ventilated to remove dust from the work environment. In addition, process air is treated with a wet-scrubbing process to remove ammonia. The dust containing air that is extracted from the work environment tends to cause blockage in the wet-scrubber. To solve this issue, WTT developed a two-stage acid scrubber. This scrubber reduces pressure losses and decreases energy consumption. In addition, maintenance costs can go down with 50% and downtime is reduced.


The buildings of a facility are ventilated to remove dust from the work environment. In addition, process air is treated to remove ammonia. Ammonia removal is achieved with a wet-scrubbing process, where ammonia is captured and discharged as a liquid fertilizer product. The dust containing air that is extracted from the work environments tends to cause blockage in the wet-scrubber.


WTT has developed a two-stage acid scrubber that first removes dust from the air, and then removes the ammonia. The dust removal section utilizes spray nozzles to trap the dust particles in the water. The air can now enter the ammonia section where the ammonia is removed by using a sulfuric acid solution, creating a fertilizer product: ammonium-sulphate.

The ammonium-sulphate is pumped from the ammonia section to the dust section, here it is recirculated to neutralize the solution. From the dust section the liquid fertilizer is pumped to a storage tank.


The two-stage acid scrubber developed by WTT leads to:

  • A reduction in pressure losses
  • Lower energy consumption
  • Maintenance costs can be reduced by 50%
  • Less downtime.

London / Canada

The London Composting facility in Canada generates over 72,000,000 kWh a year in thermal energy. A single €400,000 investment in a pre-heating & re-circulation system makes that 2,500,000 kWh gets re-used & 240,000 m³ of gas gets saved. With shorter tunnel heat-up times thus a higher throughput, improved conditions in the building, and by reducing condensation and elongated lifetime of the building structure.


London Composting generates massive amounts of thermal energy through the composting process. During the winter period some of this thermal energy can be re-used to pre-heat the fresh air that’s blown into the buildings. As the temperature in the building increases, the relative humidity of the air lowers, thus improving the conditions inside. The building air is used as fresh air for the composting tunnels, which will heat-up quicker with a higher fresh air temperature. To heat the building with gas, the London Facility would have lost €25.000 a year. Through faster heat-up times, more waste can be handled during winter months, which can earn an additional €165.000 a year, what an opportunity!


WTT installed additional heat exchangers, pumps, piping and related instrumentation to catch the process heat, and transfer this to the fresh air. The entire system is automatically controlled and only requires a few manual actions before & after every winter season. A system like this can be installed relatively simply in 6 weeks’ time with little impact on the running process.


  • Facility can now generate €165,000 of extra revenue every year
  • Heat-up times reduced to within 24 hours
  • Typical investment of €400,000 per facility
  • Throughput increase of >3.5%

Halifax - Canada

The new Organics Facility in Halifax Canada has 13 composting tunnels. A single €220 000 investment in innovative headers for all tunnels resulted in energy savings of 5%. With current electricity prices the costs savings are between €20.000 and €35.000 each year. In addition, the reduced pressure losses, and more evenly distributed air flow, improves the result of the composting process.


Halifax Organics Facility processes residential and commercial organics through 13 composting tunnels. The engineers of WTT found that the standard headers for ventilation of the tunnels resulted in sub-optimal air flows causing significant pressure losses. In addition, these headers caused a sub-optimal distribution of air flow over the spigot floor. About 5% of this energy can be saved if the optimal header design would be used.


WTT designed an improved header concept that results in less backflows and thereto less pressure losses. The air flow over the spigot floor is more evenly distributed and the total system becomes more effective, saving energy. Our engineers can perform innovative Computational Fluid Dynamics (CDF) energy simulations to find inefficient air flows and thereby only redesign and replace the parts that are significantly impacting energy costs. Replacements are relatively simple, with little impact on the running process.


The single €220,000 investment saves up to 5% a year, which would be between €20.000 and €35.000 a year with current energy prices. Improved air flows can also lead to better composting process results. The return on investment is between 5 and 10 years.

View Past Client Projects


The Olper Entsorgungszentrum includes 9 composting tunnels. The facility treats 58.000 t/a of fresh biowaste. All composting tunnels are equipped with a fully automated ventilation and irrigation system. The process itself is controlled and visualized by a SCADA system located in the control room. After the in-vessel composting phase, the waste is fed by wheel loader to the compost refining line.


Ca. 40.000 t/a of waste coming from the tunnels is fed to the mechanical post-treatment line. The waste passes a series of treatment steps by which ferrous, non-ferrous, and inert materials are extracted. The material is sieved at 70mm, and in a second sieving step at 15mm. The final quality compost product is 0-15mm. All fractions are transported by conveyors to indoor storage bunkers, awaiting further transport of site. In 2017, a NIR machine was included in the mechanical line. This machine can remove foils and plastics from the waste, thereby ultimately contributing to a cleaner compost fraction at the end of the process. The addition saved significant time and money to the operator and thereby improved the biological process


9 composting tunnels, compost refining line, facility air treatment, control and visualization

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