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Products and services

supporting emerging circular bio-economies



We design and build equipment to order, from digesters and pasteurisers to gas holders and gas storage solutions. We also advise on system layout and ways to better integrate AD with your site including digestate management. Get in touch to find out more.


Ancillary equipment

Need a food/crop waste shredder, a biogas compression system, gas storage, a desulphuriser? We can help fill in the gaps to ensure your system runs smoothly.


Micro-scale anaerobic digesters

Looking to manage your organic waste on site? We can assess your needs and provide a solution tailored to your waste volumes and ability to utilise the by-products.

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Manufacturing to order

We specialise in developing bespoke equipment for small-scale applications. Together with our manufacturing partner Alvan Blanch, we can supply equipment to suit your processing needs.


Control and monitoring systems

We build modular, low-cost  solutions that provide remote control and monitoring capacity for a range of applications including micro AD and hydroponics.

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Courses and workshops

learn new skills for a sustainable future

Courses and workshops


We run training on demand. If you're an individual and interested in one of the courses below get in touch. We'll let you know when we have enough people to run the course. To book a course for your group or organisation, click on the green button below and let us know what you're interested in. Our rates are flexible and vary according to group size. The income we generate helps us deliver activities for more disadvantaged individuals and groups. Check out our range of courses and workshops below.

Circular Economy Training Day

A fun, brain stretching, team building introduction

Duration: Either two 3-hour sessions or one 6-hour day

Get to grips with the circular economy. We'll start with the bigger vision and zoom in to see how it can help you/your organisation become resource efficient and environmentally informed while saving the planet! 


We'll help you communicate sustainability achievements to your wider team and give you tools to identify creative approaches to lowering your carbon footprint. The training combines interactive theory and practical activities to engage mind and body.

You'll learn: 

  • the five pillars of the circular economy;

  • how to engage your team in developing new skills to identify collaborative solutions;

  • how to measure your/your organisation's progress;

  • tools to communicate your organisation's circular successes; 

  • inspiring examples of circular models, initiatives and practices.


Image courtesy of the Ellen MacArthur Foundation


Through the Microscope

Embracing breakdown: fermentation, decomposition, digestion and transformation

The Roving Microscope and LEAP Micro AD create a unique opportunity to look inside Calthorpe’s anaerobic digester. A giant mechanical stomach, the digester produces a rich liquid fertiliser and biogas, recycling food waste from nearby households and cafes.

During this workshop we will look through the microscope at the different biological communities that make this possible. We will also compare aerobic and anaerobic conditions in soil, compost and food.

In the afternoon, We will look at fermentation, harnessing specific anaerobic bacteria in an amazing alchemy of vegetables.


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Become an Urban Food Grower 2.0

Learn to grow your own food in the city

Duration: Choose from four 3-hour sessions or two 6-hour days

Try out new skills in a friendly, relaxed, green environment. We will teach a combination of hands-on activities and theory in a well established food growing site with polytunnels and raised beds. We'll help you feel confident about growing your own food, flowers, herbs etc. An AQA accreditation is available on request (£20).

You'll learn: 

  • how to grow and care for a range of crops from seed;

  • harvesting and pruning tips;

  • techniques you can use on your windowsill, balcony, garden, allotment or office;

  • soil basics and what makes healthy soil;

  • what to about about pests and diseases; 


Closed-loop food

Using micro anaerobic digestion and composting

Duration: Either two 3-hour sessions or one 6-hour day

Find out about the two ways to recycle organic waste - anaerobic digestion and aerobic composting. We will take a look at the processes that go on in a digester and composter to understand how each can benefit your soil. We'll explore how a localised approach to food, energy and waste can help reduce air pollution, carbon and methane emissions, and produce healthier, more nutritious food. We'll also discuss opportunities for hydroponics using the liquid digestate.

You'll learn: 

  • the difference between aerobic and anaerobic breakdown;

  • why the by-products from each process are complimentary;

  • how to use digestate and compost to benefit soil health;

  • the benefits of the closed-loop food approach; 

  • how to think circular inspired by innovative circular models, initiatives and practices.

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Hydrogen Utopia?

Exploring hydrogen as a clean energy source with hydrogen-stove cooking demonstration

Duration 2 hours - 1 day workshops

Join UK associate artist Nick Laessing for a conversation on energy utopias and the potential of hydrogen as a locally-produced sustainable energy source in an age of ecological and climatic emergencies. 

Nick will introduce his own research exploring our relationships with technology and usership in a time of planetary urgencies, followed by a demonstration of his hydrogen kitchen, with the chance to try some food cooked on its stove.

Hydrogen kitchen is a work consisting of a water electrolysis system, that decomposes water into oxygen and hydrogen gas, and a specially-constructed gas stove. Made in collaboration with the Chemical Engineering department at University College London, it aims towards a low cost and open source alternative to conventional hydrogen systems.

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Site visits and presentations
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Site visits and presentations

explore circular economy theory and practice


Closed-loop guided tour

Come and explore our demonstration sites with a guided tour. We'll talk you though the technology, how it works, how it links with food growing, sustainability, climate change and the bigger vision. We have sites in Central and East London

Duration:      30-60 mins

Sliding-scale fee:

Groups:        £40 - 75

Individuals:  £15 - 30

Closed-loop guided tour + practical activities

Closed-loop guided tour as above plus practical group activities. Depending on the size of your group, we'll split up into rotating groups for taster activity sessions that includes:

  • Anaerobic digestion and composting

  • Urban food growing

  • Hydroponics

  • Low cost control and monitoring

Duration:      60-90 mins

Sliding-scale fee:

Groups:        £75 - 150

Closed-loop demonstration + practical activities + presentation

Closed-loop guided tour and practical activities as above plus a presentation where you will:

  • Learn in more depth about the various elements of the closed-loop cycle

  • Why it's important and how it fits into the bigger picture

  • Think through how to build a closed loop cycle

  • Find out about the range of closed-loop applications from urban sites and rural off-grid communities to developing countries.

Duration:      90 - 120 mins


Sliding-scale fee:

Groups:        £150 - 250

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helping you navigate towards a circular future 


Want to install an anaerobic digestion system? Integrate it with other renewables? Assess the feasibility of setting up a closed-loop system on your site? Understand the environmental, economic and social benefits of decentralised organic waste management for your organisation, business, community or local area?

We can help:

assess your site

choose the right combination of renewable technologies for off-grid systems

navigate planning, regulations and H&S issues

monitor and optimise your process

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