Biogas

The allrounder among renewable energies

Whether as a source of electricity to generate heat locally, to supply heat by pipeline or to feed into the gas network after processing - Biogas is multi-talented and versatile. The weather-independent generation is a predictable source of revenue for the operator, since energy from biogas is not subject to any price fluctuations. At the same time, a biogas plant actively contributes to environmental protection and energy mix of the future.

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The advantages of biogas at a glance:

Multifunctional

Generation of electricity
Generation of heat and coldness
Conversion to natural gas

Highly efficient

Highest energy recovery amongst all biomass project types
Use of the whole crop in comparison to other bio fuels
Variety of feed-stocks can be processed (e.g. organic waste)

Storable and available

Peak load capability
Base load capability
Power generation unrelated to weather conditions

Output

Clear net positive carbon footprint
Suitable for the development of decentralised energy supply
Fermentation residues suitable for premium fertilize

How does a biogas plant work?

The basic principle of a biogas plant is relatively simple. Renewable raw materials from agriculture, animal droppings, residues from the food and agro-industry, can be used as input materials.

In airtight fermentation vessels - the so-called digesters - a fermentation process is stimulated and produces biogas using bacteria. The bacteria are similar to those which can also be found in the digestive tract of a cow. Main products of anaerobic degradation are energy-rich methane and carbon dioxide. Since both are gaseous, they separate from the fermentation substrate and form the main components of biogas. Carbon dioxide is not oxidized, but then can be supplied together with the energy-rich methane cogeneration power stations of combustion and fed into each locally existing heat network.

In our animated film, you can see the whole process of biogas production and find out more about our proven technology.

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BIOGAS IN AGRICULTURE

Energy, fertiliser and an additional source of revenue

Agricultural companies have the opportunity of generating valuable, sustainable and renewable energy with by-products of their business such as liquid manure, biomass and organic agricultural waste. Generating biogas offers plant operators a source of revenue that can be accurately calculated for years – which is a factor that can be decisive for the long-term prospects of a farming business.

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FIND OUT MORE ABOUT THE BENEFITS OF BIOGAS FOR FARMERS:

Long-term prospects for farms

Many farmers use biogas production to establish a second economic mainstay, thereby ensuring that their agricultural enterprises continue to flourish into the next generation.

No monocultures

All types of agricultural raw and residual materials can be used in our biogas plants. This assures farmers a healthy crop rotation and helps them prevent monocultures. Even catch crops, whole-plant silage and energy beets deliver top yields.

Valuable fermentation residues without smells

If a biogas plant is operated properly, there are no odour nuisances, since the produced gas cannot escape from the closed cycle. The fully fermented end product has a noticeably reduced odour after the fermentation process. As a fertiliser with a high nutrient content, these fermentation residues relieve farmers from purchasing expensive mineral fertiliser.

Since every company is different, our systems are tailored to your exact requirements. Regardless of the plant size, our field-tested EnviFarm technology ensures a high level of safety and reliability: fully automated, flexible and of the highest quality.

ENVIFARM BIOGAS PLANTS

Our solution for the agricultural sector

Our field-tested EnviFarm biogas plants offer you a flexible choice of input materials, and are tailored individually to your business and your specific requirements. As an alternative to being run as slurry-only plants, you can also operate them with biomass or with any type of organic waste. The stable and spacious technical building offered by an EnviFarm plant allows optimum temperature control with innovative ventilation technology, plus weather-independent operation and storage.

EnviFarm is equally impressive in its compact version (plant output from 75 kWel). The modular, container-based format means EnviFarm can be installed as a compact plant that makes the most of available space. Whatever the model, all our biogas plants have one thing in common: impressively high efficiency and maximum profitability.

Looking for just the right biogas plant for your agricultural business? We’re sure to have the EnviFarm you need:

Interested in finding out more? Simply click through our >> INTERACTIVE ANIMATION << and learn all about the layout of our EnviFarm plants and the advantages that are offered by each component.

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YOUR ADVANTAGES AT A GLANCE

Optimum safety and dependable EnviTec quality
A made-to-measure match for your business
High plant efficiency (gas yield up to 9% higher thanks to patented Kreis Biogas Dissolver)
CE marking for EnviTec’s scope of delivery
Technical customer service and biological service from a single source

Driven by our technological farsightedness and the very highest quality standards, we’ve been researching additional technologies capable of optimising biogas plant usage from the very start. And this hard work has paid off: our ‘Kreis Dissolver’ mixing system offers impressively high substrate savings and higher gas yields, for example. Our EnviTec Feedcontrol feeding system maximises the capacity utilisation of your biogas plant, saving you valuable input materials.

Interested in finding out more? Simply click through our interactive animation and learn all about the layout of our EnviFarm plants and the advantages that are offered by each component.

Interactive Animation

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ENVIWASTE

Turning waste into biogas

Waste materials and by-products are accrued in conjunction with every single manufacturing operation, such as enterprises associated with the food and restaurant sector, the fuel industry, the cosmetics sector and the animal husbandry sector. However, the quantity of organic waste produced by the citizenry is also significant for communes – about half a tonne per year per person. In addition to saving you the trouble of disposing of your residual products, our biogas technology also makes it possible for you to convert the waste into useful energy.

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ADVANTAGES FOR PRODUCERS

Own energy from cogeneration : electricity, steam and heat
Biogas can be used as a source of electricity or to generate heat. After it has been processed into biomethane, it may also be fed into the gas grid. In case of industrial utilisation, the heat that accrues in conjunction with the combustion process taking place in the CHP can be returned to the company in the form of process heat. This is particularly worthwhile for energy-intensive companies with high heat requirements. It makes it possible for such companies to save on heating expenses.
Odour-free, natural fermentation residues for agriculture
If a biogas plant is operated properly, there are no odour nuisances since the produced gas cannot escape from the closed cycle. The fully fermented end product has a noticeably reduced odour after the fermentation process. As high-nutrient fertilisers, these fermentation residues make it unnecessary for farmers to purchase expensive and pollutant mineral fertilisers.
Filtering and cleaning the digestate residues to process water
Ultra-modern filtration technology makes it possible to further process the digestate. This procedure yields processed service water that can be used for the subsequent industrial process.
Improved CO2 balance
Thanks to the high energy yield in the EnviWaste plants, the required amount of fossil fuels undergoes a reduction, resulting in a considerable improvement in the CO2 figures of production plants. This gives you an important competitive edge, as more and more consumers and companies are emphasising sustainable production when purchasing products.

What kinds of waste are suitable for energy production?

Many organic waste materials are well-suited for use as raw materials in biogas production. In manufacturing, substrates with a high calorific value are often found as waste materials and by-products

Slaughterhouses
The food-production industry and the food-processing industry
Supermarkets, e.g. spoiled food products
Breweries (malt spent grains)
Restaurants
Juice production
The ethanol industry (mash)
The biofuel industry, e.g. glycerine
Animal hunbandry
Purification plants: Sewage sludge
The animal feed industry

On the following page, find out more about our EnviWaste technology – from waste material to energy.

WASTE-TO-ENERGY

From project planning to service

...we offer you all the steps from one hand. Whether concept design, construction, commissioning or servicing of your EnviWaste-plant - we are on your side. With our offer you can use long-term secured regulatory conditions, guaranteed feed-in tariffs for electricity and the possibilities of the liberalized energy markets. An investment in the future of the renewable energies market pays twice: The environmental impact is reduced, the value chain optimized.

THE PROCESS STEPS IN DETAIL:

Waste materials from the industrial, business and agricultural sectors

Many different organic waste materials are well-suited for being used as raw materials for the production of biogas. When used in conjunction with the right technology as high-value substrates, food and restaurant waste, green waste, glycerine, slaughterhouse waste and botanical and animal fat can lead to an impressive income. In this regard, the advantage that residual materials have over other input materials which appear to be equally attractive from an energy-related point of view is the fact that these residues do not require any cultivation areas.

Unpacking and cleaning the waste materials

Even packaged waste can be used for biogas production following an automatic separation from its casing. It must also be cleaned, in order to ensure that it is harmless (from the point of view of hygiene) and is free of pathogens. Waste fermentation plants are subject to stringent technical requirements, since plastic packages and the like are non-recyclable and must be removed before the fermentation process is carried out.