Get in touch
Get in touch


Frequently asked questions about our waste management and waste transport services.

Anaerobic Digestion

Q How does anaerobic digestion work?

Anaerobic digestion is a sequence of processes by which microorganisms break down biodegradable material in the absence of oxygen. The process is used for industrial or domestic purposes to manage waste or to produce fuels. Read More

Q What are the advantages of Anaerobic Digestion?

  • Biogas can be used as electricity or for heating, and can be upgraded to make renewable natural gas.
  • Almost any biomass can be processed in AD. That includes food waste, energy crops, crop residues, slurry and manure.
  • It is a valuable source of energy.
Read More

Q How does anaerobic digestion make electricity?

By using a CHP (combined heat and power process) the AD process can be used to directly generate electricity and heated water for premises. Low cost and low impact on the environment.

Q What materials can you use in Anaerobic Digestion?

Materials high in organic content, such as municipal wastewater, livestock waste, agricultural waste, and food wastes, may all undergo anaerobic digestion. The methane gas produced is then utilised as fuel by combined heat and power (CHP) engines, which produce electricity which is sent to the electrical grid, or alternatively the gas is treated and injected to the gas grid. Read More

Q Why you should recycle food waste?

There is no amount of food waste too small, we recycle all food waste and turn it into green energy through the process of anaerobic digestion. All recycled food waste reduces that in landfill and therefore the associated greenhouse gases that would be released if the breakdown process were to happen in landfill. Recycling food waste is cheaper than sending it to landfill and has added environmental benefits, plus working with a reputable food waste recycling facility means you have more flexibility and control over the process.


Q Why is biomass considered a renewable resource?

Biomass is considered to be a renewable resource because of how it is derived. Biomass typically comes from crop waste, wood, and specific resources that have been grown to create energy. Read More


Q How do you produce biogas?

Biogas is the mixture of gases produced by the breakdown of organic matter in the absence of oxygen (anaerobically), primarily consisting of methane and carbon dioxide. Biogas can be produced from raw materials such as agricultural waste, manure, municipal waste, plant material, sewage, green waste or food waste. Biogas is a renewable energy source. Read More


Q What types of packaging can you accept?

We can accept all types of packaging from plastic, cardboard, paper and metal. Please direct any specific enquiries to us through our contact us page. Read More

Green Energy

Q What does green energy mean?

Green energy can be made up of a number of different ‘elements’ such as wind, sunshine and wave. Green energy can also be defined as renewable energy since it is not exhausted at the source. It is sustainable energy that can be used by generations to come. Green energy is referred to as clean energy due to the lack of negative impacts on the environment - for example, food waste transformed into energy through the Anaerobic Digestion process. Read More

Q How can green energy help the environment?

In addition to the benefits of the anaerobic digestion process and its immediate environmental energy benefits, the location of our regional waste management facilities means transportation costs and journeys in terms of miles are also reduced. We have a network of transportation facilities which means we will work out the most economical way of collecting and transporting your businesses waste. Read More


Q Where are your sites located?

We own and operate a group of Anaerobic Digestion facilities across the UK - 6 in total. Read More


Q What services do you offer?

We offer a full waste management package across all our sites up and down the UK - including food waste recycling, oils and fats recycling and we operate a highly versatile waste transfer station. Read More

Food Waste

Q What types of food can you accept?

We can accept almost all types of food waste, in various types of packaging. We would need confirmation of the required EWC code to ensure we’re permitted to accept it. Please direct any specific enquiries to us through our contact us page. Read More

Booking in waste

Q How do I book a load in?

Please call 01354 655953 and speak to the bookings team.

The process

Q What is the waste acceptance process?

After an initial enquiry, you'll be asked to complete a waste agreement form. Once this is complete we'll undertake a series of checks on the waste, so if it’s liquid we'll undertake some tests in advance of accepting the waste. We need to do this as part of the regulated processes we follow to adhere to our regulators processes.

Rest assured that our team of highly trained professionals will ensure each stage of the process is as transparent and easy as possible and we'll adapt it to suit your business needs.


Q What is the cost of this service?

The cost of our service is dependent on the calorific value of the food waste and upon how much packaging will need to be removed prior to the AD process. Prices can be given within 24 hours of enquiry, please call our team on 01427 667744 for specific pricing.


Q Regulation (Permits / Insurances / Accreditations)

We take our responsibility incredibly seriously and are regulated and monitored by a number of organisations to ensure that we meet our duty of care. The collection, transportation and processing of waste materials is heavily regulated and when you work with us, you can be assured that you’re complying with all the relevant regulations. In some cases we’ll also provide you with certificates that we need you to keep in file for up to 2 years as part of this process.


Q What is Biofertiliser?

Biofertiliser is created as the end product of the anaerobic digestion (AD) process. The digestate or biofertiliser produced undergoes pasteurisation to ensure that any pathogens are destroyed and is stored in large lagoons ready to be applied on farmland.

Q What are the benefits of using Biofertiliser?

The use of this high nutrient biofertiliser replaces the use of fossil-fuel derived fertilisers and ensures a complete loop of carbon and energy capture.

Q Is using biofertiliser cost-effective?

Many farmers will see the costs associated with the purchase of fertilisers dramatically decrease following the adoption of this rich nutrient filled digestate, often saving thousands of pounds a year compared to chemical fertilisers.

Q Industry standards

We take digestate quality seriously. All our plants are part of the Biofertiliser Certification Scheme (BCS) and produce only PAS110 digestate. This scheme sets out standards for the feedstock, production, and quality assurances of the final product; meaning that our digestate is consistent and is a product marketed as ‘Biofertiliser’.

Q Who should I contact at BioteCH4?

If you’d like to find out more about biofertilisers or the use of digestate then you can contact our Digestate Manager Isaac Carswell - 07999 112 279.

Oils and Fats

Q Why oils and fats are not to be poured into drains

It is illegal to dispose of oils and fats into the public drainage system, once a liquified oil is poured down a drain it will start to solidify, when done regularly this will start to build up and create blockages within the drainage systems. These blockages will contribute to over 200,000 blockages of drainage systems in the UK every year.

Q What to do with leftover cooking fat and oils at home

If you have larger quantities of oils and fats at home, you can recycle this at your local council recycling centres. For smaller quantities you can recycle it by mixing with your food waste and recycling with your food waste collection service provided by your local authority. If you are not provided with this service, store your waste oils and fats in a sealed container and mix with your general waste.

Q What to do with oils and fats from catering establishments such as hotels, restaurants, and takeaways.

Contact Changing Waste Ltd (01430 434985) as you are legally obliged to dispose of your used cooking oils and fats through a licensed disposal route. Changing Waste or its sister companies will provide you with containers to store your oils and fats in and provide all your Duty of Care paperwork to prove you are disposing of your waste through a licensed disposal route. You are legally obliged to keep and produce proof of disposal paperwork for a period of two years should your local enforcement officer request to see it.

Q Is it illegal to pour oils and fats down the drain?

Yes, if you are a commercial business you can face large fines and other financial penalties for careless disposal of oils and fats. Pouring fats and oils down the drain whether commercially or domestically should be avoided at all costs.

Q What happens to waste cooking oil?

Through the process of recycling oils and fats waste, it can be used for many purposes. For example, the waste oil we recycle is used to create Biodiesel which is blended with regular diesel to reduce the carbon content of fuel and make it into a greener renewable fuel which is far better for the environment.

Q Safe disposal of oils and fats

It’s important your business complies with all the industry rules and regulations around the safe disposal of your oils and fats waste. Our experienced team can help design, develop and deliver a bespoke disposal and recycling service for your organisation’s waste oils and fats.

Q How much is waste oil worth?

We always pay the best market rates for your waste oils and fats. We review our prices regularly and will always work with you to ensure you’re getting the best deal; your account manager is on hand for any questions you may have and will work with you through every stage of the recycling process.