Organic Waste Challenges

Organic waste has always been a considerable challenge. Whether separated or as part of mixed waste, it causes contamination and noxious odours. Most organic waste today still ends up in a landfill. Subsequently, decomposition produces leachate which can cause severe land and especially water pollution. It also causes emission of polluting gases, notably methane, into the atmosphere. Separating organics from mixed waste remains one of the biggest challenges for municipal and commercial waste operators.

Anaerobic digestion (AD) and composting plants successfully process pure organic waste. The digestion process produces biogas which is mostly methane. These plants, however, require large quantities of pure organic waste due to the high capital costs. In addition, they process only pure organics and cannot cope with mixed waste.

Companies use various technologies to try and separate organics when processing mixed waste. These come at a cost and as a result treatment plants tend to be large scale and are located far away from waste sources. Consequently, waste transportation is needed over long distances adding to the already high operating costs.

Downscaling Organic Waste Processing

In recent years, many companies have been exploring smaller local solutions for waste treatment. Small-scale anaerobic digestion is one such option to treat organic waste at source. However, this technology is very expensive for such a scale. Furthermore, the digestion process still leaves a considerable proportion of incoming waste as output. This is called digestate which still requires disposal. In some cases, it can be spread on land as fertiliser. However, if it originates from food waste then usually authorities do not allow such use.

How Envitech Can Help

For processing a large volume of organic waste, we can assist with developing anaerobic digestion (biogas) plants. We have extensive expertise and you can find out more on our Biogas Production page. For smaller scale, we have an innovative solution to process organic waste at source. It can eliminate up to 96% of any organic waste within 3 days and is much more cost effective than many other alternatives. Meet the extremophile digestion technology which our partners Advetec Group have developed in the United Kingdom. Envitech is the authorised reseller of Advetec technology and products for the Republic of Bulgaria and Dominican Republic.

Food waste is organic waste
Garden organic waste
Small AD for organic waste

Introducing Advetec Group

Advetec head office

Advetec is a British manufacturer of unique biotechnologies which quickly eliminate organic waste. For over 17 years it has been building very efficient as well as scalable systems. They offer possibilities for eliminating organic waste which have not been seen before. The company operates internationally with headquarters in the United Kingdom as well as an office in Florida, USA. It serves big industrial, commercial and utility companies as well as smaller organisations.

Two unique technologies are at the core of the company’s solutions. Advetec XO™ enables processing of solid waste and wastewater sludge. Similarly, Advetec Bio-Reactor™ provides a solution for additional treatment of effluents. It quickly reduces the levels of critically monitored water quality parameters. All solutions are bespoke, scalable and installed at source in order to accommodate customer needs. They reduce (or completely eliminate) the high costs of waste disposal including transportation.

Advetec Group accreditation banner

What is Advetec XO™?

Advetec XO organic waste system logo
Extremophile bacteria effectively digest organic waste
Advetec XO info sheet

Advetec XO™ (M) is an in-vessel engineered solution which quickly digests solid organic waste. It has a small and flexible footprint and we can design and install it at source. The system comes in sizes between 0.5-10 tonnes of daily throughput of solid waste. In order to cope with larger volume requirements, we can integrate and link multiple systems on a single site location. The system can handle a wide spectrum of wastes from pure organic waste to mixed waste. Notably, it also processes difficult wastes which include hard carbons, cellulose and lignin-based materials. As such, it can handle organic waste from abattoirs, sewage sludge, fat traps, septic tanks, filter cakes and many more. Likewise, it can also process garden waste.

Extremophiles – Evolution in Organic Waste Digestion

At the core of the biological process is a unique extremophile biotechnology developed by Advetec Group. It features a special proprietary blend of deep ocean extremophile bacteria which almost completely digest organic matter, producing water in the process. The process is thermal due to the high temperatures the bacteria require in their environment.

Over the years, Advetec not only perfected the bacterial mix but also developed unique natural biostimulants. They stimulate both the extremophiles and the bacteria which naturally occur in organic waste. Subsequently they grow and digest organics quickly and effectively – within 2-3 days. The biotechnology comes in a neat engineered solution with a small and cost-effective design. You can visit our Resource Centre page to watch some interesting videos about the system.

How the Process Works

  1. A shredder macerates incoming waste which then enters the Advetec XO system.
  2. An automatic dosing system disperses a bespoke blend of extremophile bacteria and biostimulants.
  3. An agitator constantly mixes the waste ensuring optimal bacterial coverage.
  4. The biostimulants stimulate the proprietary bacteria as well as those which naturally occur in the waste. Subsequently, they grow and digest the organic fraction of waste quickly and more effectively.
  5. The process produces heat and water in the form of vapour which is non-polluting. It vents out of the system into the atmosphere. Alternatively, a condenser unit (optional) converts it into water for recovery and reuse for irrigation or other similar purposes. Subject to additional purification, it can also become drinkable.
  6. The unprocessed (non-organic) part of the waste comes out into a container. Typically, it is a small proportion of the incoming waste and has a very low moisture content (<10%). It can potentially have a very high calorific value which essentially makes it a refuse derived fuel with commercial value. Its subsequent incineration can generate energy.
  7. The entire process is odour free. In addition, Advetec staff remotely monitor all parts of the system including exit gas quality. This ensures a pollution free operation.
Advetec XO solid organic waste schematic

Unique Aspects of Advetec XO™

  • Proprietary bacteria digest up to 96% of organic waste within 3 days and at source. No waste transportation is necessary which saves significant costs

  • The system is scalable and flexible. It can process between 0.5 – 10 tonnes of waste daily.  We can install multiple systems for greater capacity requirements

  • A small and efficient footprint is a unique feature of the system which requires little space

  • The system is inexpensive with typical payback period in the UK between 18-24 months (local factors in different countries determine period)

  • We optimise the system for different input waste streams. Each system is bespoke and we tailor it according to your needs

  • The system is portable and can serve multiple sites in close proximity

  • The system is simple from engineering point of view and consists of standard readily available components

  • The process is fully automatic

  • Energy requirements to run the system are minimal due to the process sustaining generated heat

  • Dedicated staff monitor and optimise the system remotely from the Advetec control centre in the UK. An integrated PLC control panel by Siemens and a SCADA system with sensors controls the system and allows remote monitoring and data storage

  • Most of the output is water, which due to the heat is in the form of vapour. It does not cause pollution and simply vents into the atmosphere. There are options to capture and reuse water if necessary

  • The system is odour free and environmentally friendly. It produces only traces of CO2 due to bacterial respiration


Major Shopping Centre, USA

Restaurant food waste

Best Western Group, UK

Food and general waste

Biffa, UK

Organic fines of MSW

Baseball Stadium, USA

Food waste

Cootehill Poultry Farm, Ireland

Poultry processing waste


You Can Benefit

You can significantly reduce your waste disposal costs and improve your green credentials. Whether you are a municipality or a business of any scale, we can help you with the right solution. See below for more info.