Anaerobic Digestion (biogas)

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Introducing Anaerobic Digestion 


Harp Renewables deliver Anaerobic Digestion Projects (AD) across Ireland and UK.

The technology provided is a proven 2 stage AD process that is constructed and delivered in modular form and is sufficiently flexible to deal with processing agricultural wastes, food wastes, energy crops, and ABP (Animal By Product) to produce biogas and electricity.

Harp Renewables has a full team of experts that specialise in every aspect involved in an AD plants such as, calculation feedstock, analysis of tank sizes, civil, construction of the project, project management, and Aftersales support.

Full circular service

Harp Renewables offer a full circular service and work very closely with each client on the following:

  • AD plant location
  • Grid connection
  • Feedstock analysis
  • Planning
  • AD plant design and build
  • Operator training
  • Remote monitoring
  • Aftersales support
  • Services and maintenance

Harp Renewables is a member of the Composting Anaerobic Digestion Association of Ireland (Cre). As a Cre member, Harp have access to specialist technical advice on correct procedures for handling Animal by Products (ABP) and Harp are continuously up to date on their knowledge regarding food waste regulations.

Recent projects

High Lea Farm – Dorset, England


High Lea Farm in Dorset provides 125kw / hr to the grid and also provides 147kw of thermal heat to local butchers, a grain drying store, and also an old schoolhouse.


Site background: 

Mixed farm based project.
125kw electricity.
147kw heat/thermal.

Site feedstock: 

Fodder beet
Farmyard manure

Site clearance

The initial stage of this project was the site clearance stage. Harp Renewables oversaw the entire project with a large cut to fill in order to level up the site. This stage took several weeks to complete. This included:

  • Topo survey
  • Design levels
  • Topsoil strip and bulk excavation

Site construction

The next stage of this project was the site construction stage.

  •  Design and build
  • Construct
  • Plan and develop


Get in touch


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See what our clients say

''Great Educational Tool''

“We invested in a Harp CX5 Bio-Digester with a bespoke integrated biomass boiler as a solution to our waste costs. We are saving around £11,000 annually now.

With this solution we are also able to use the biomass boiler to heat out facilities which in turn dramatically reduces our heating’s C02 emissioons. All the excess digestate is then used as an organic fertilizer in our on-site greenhouses.

This is a great educational tool to teach all the students about sustainability so thatin the future, students are interested and determined to make this world a greener more environmentally friendly place to live.”

– Penair School


“We haven’t sent any waste offsite since we installed the bio-digester in December, The bio-digester makes people think a bit more about what they are doing and keeps everyone focused on ‘green’ ways to process waste. The process has been embraced by our tenants and has got them thinking more about waste segregation. They now unpackage their sent produce.

As a result, not only are there no contaminated bins coming through, but we are creating added revenue by bailing our plastic. In preparation for a return to normal operations, we look forward to installing a second Harp – bio digester.

We are delighted with this initiative which directly feeds into our People Planet Sustainable Strategy”

– Michael Farrell, Estate Manager at Captial Dock Aramark Properties.

''Ideal Solution''

“Our customers are delighted that they now have a solution for food waste and are not contributing to unnecessary environmental damage caused by sending the organic matter to landfill. Harp Renewables has been hugely helpful and very responsive to any questions we have had, particularly in the early days while everyone was getting used to using the bio-digester.

There has also been a lot of interest in the bio-digester from other Local Authorities and the DCCAE.

It would be an ideal solution to any organisation with excess food waste and I would have no hesitation in recommending Harp Renewables to any interested party.”

 – Bernadine Carry, Environmental Awareness Officer at Meath County Council shares

Harp Renewables