World News

Industry news and insights from Europe and around the World

UK News

Latest news and developments in the United Kingdom


Keep up-to-date with the latest new products and technology


General articles, applications and industry analysis

Cooling vital for biodigester plants

UK: Temporary chillers are being used to provide essential cooling during the service and maintenance of energy-from-waste biodigester plants.

Biodigester plants harness natural biological processes using bacteria to breakdown organic matter to produce methane. The gas is then used as a fuel source to generate electricity. The benefit is that food and agricultural waste that would otherwise be sent to landfill can be used to produce clean energy.

When new plants are commissioned, an external energy source is required to warm the organic feed stock within the biodigester, to initiate biological activity. Once this process becomes established, it produces its own heat as a result of the biological activity and becomes self-perpetuating.

During maintenance, the process must be reversed and a chiller is used to cool the contents of the biodigester in order to arrest biological activity.

Carrier Rental Systems has been in the position of being able to supply temporary equipment for both the heating and cooling processes. In addition to supplying packaged boiler plant for the start-up process, the Surrey-based company can also supply packaged Carrier AquaForce 30XA air-cooled screw chillers to stop the process.

In a recent example, Carrier Rental Systems supplied a 100kW Carrier AquaForce chiller to an energy-from-waste plant in Reading, which was due for major maintenance work. The chiller was connected to the plant’s main process heat exchanger, enabling rapid cooling of the biodigester contents as they passed through. This quickly reduced the temperature within the reactor vessel, progressively arresting biological processes, enabling maintenance work to commence.

Explaining the benefits of using hire equipment, Marc White, director of Carrier Rental Systems, said: “In the case of heating during the initial phase, it overcomes the need to invest in permanent capital plant for customers, which would in any case no longer be needed after the first few weeks of commissioning.

“At a more advanced stage of the production cycle, hire chillers are an excellent option in order to stop the activity within the biodigester, as they allow essential maintenance and upgrade work to be carried out much more quickly and effectively, and at less cost.”

Latest News

1st March 2024

Heat pump grant requests up 39%

UK: Applications for the UK’s boiler upgrade scheme in January were up 39% on January 2023, according to figures from the Department for Energy Security and Net Zero.
1st March 2024

Bitzer to launch new hydrocarbon compressors

GERMANY: Bitzer is to expand its range of compressors with new models for use with hydrocarbon refrigerants.
29th February 2024

BESA backing for WorldSkills UK

UK:The Building Engineering Services Association (BESA) is organising the refrigeration and air conditioning (RAC) category of the WorldSkills UK competition.
29th February 2024

Beijer Ref to acquire Australian firm QAE

SWEDEN/AUSTRALIA: Beijer Ref will expand its position in the Australian market with the agreement to acquire 60% of the shares in Sydney-based Quality Air Equipment (QAE).
29th February 2024

Chemours places CEO on administrative leave

USA: Chemours has placed its president and CEO Mark Newman, CFO Jonathan Lock and principal accounting officer Camela Wisel on administrative leave pending the completion of an internal review.
28th February 2024

Seeley to boost production in US export push

AUSTRALIA: Evaporative cooling equipment manufacturer Seeley International is to upgrade and expand its manufacturing plant in Lonsdale, South Australia, to boost exports to the USA.