Dairy Crest – UK

Solid waste treatment, recycling & recovery: Organic waste energy valorization

Issue


The dairy sector faces the challenge of climate change and satisfies the environmental requirements of its key customers (retailers) although the economic performance of this sector is conditioned by its ability to innovate in terms of good environmental practices. 

 

The customer's objective

Play an active role, as the UK dairy market leader, in mitigating and adapting to climate change while increasing production capacity at the Davidstow site. To achieve this, focus on reducing the group's carbon footprint: use of greener energy sources, development of more efficient energy systems, and financing of renewable energy technologies.

 

Veolia's solution


Design and build a biomass-fired heating network for the largest dairy group in the UK. It must be able to supply the 100 000 tonnes of steam required for the processes (pasteurisation and drying) used to make 55 000 tonnes of cheese every year.

 

Innovation

The new biomass-fired steam plant runs on wood pellets from corporate waste, including building and public works, stores, and individuals. 

After being collected, the wood is sorted by grade (grade A for Dairy Crest) and checked to ensure it meets environmental requirements. Then it is shredded and cleaned of all contaminants (nails, staples). Once dried, it is processed into pellets.

500 million

litres of milk supplied by 330 dairy farmers and 700 million planned

28 %

reduction in CO2 emissions related to direct activities by 2021-2022 (against 2016-2017)

40 %

of energy consumed in 2017 came from the biomass-fired boiler

 

Technologies

Highly efficient and competitive (compared to conventional biomass-fired boilers), Veolia's solution is based on proven technology:

use of Byworth Chain Grate-Type Stoker boilers, a technology generally used for coal;

• boiler coupled to a gas turbine to optimise carbon emission reduction;

• advanced combustion system with efficient filters.

Les bénéfices client


Energy efficiency

 40 % reduction of energy costs (supply and operation).

• 90 % coverage of steam requirements by renewable energy.

 

Environmental performance

• 28 % reduction in Dairy Crest's carbon emissions.

• Use of wood waste helps turn it into a valuable energy source and greatly reduces landfilling.

 

Economic performance

The energy savings made as soon as the biomass-fired boiler entered into service accelerated return on investment for the customer.

 

Social performance

With a workforce of 200, including six employees dedicated to the biomass-fired boiler, the Davidstow site is one of the largest employers in northern Cornwall. It also helps to secure the dairy sector, through an exclusive partnership with 330 farmers in an area of 80 km between Devon and Cornwall.

Contract scope

Site: Davidstow, Cornwall

Population: 536 000

Equipment: Biomass-fired boiler

Contract term

10 years

Business sector

Industrial


Expertise

 Renewable energy solutions.

• Recycling biomass waste to produce green energy.

Planète

 Thanks to the success of the biomass project awards have showered down on Dairy Crest: the CEA Lord Ezra Award - Best Renewable Energy Project and RegenSW Award - Best Biomass Project.

 Local farmers recover the ash from combustion to use as a soil conditioner.

People

 With the creation of the Harper Adams Innovation Centre on the campus of one of the country's leading agricultural colleges - with which Veolia regularly works - Dairy Crest signs an original partnership. About forty employees from its technical and R&D teams are transferred there and work with students on the future of food and agriculture in the country.

• This university partnership won Dairy Crest the Most Innovative Contribution to Business-University Collaboration category in the Times Higher Education (THE) in 2016.