Loading the player ...
- Offer Profile
- Renewable energy from
The number of our locations is growing continuously. The reason for this is
that the advantages of biogas spread among governments, farmers and
investors. But it is also because potential plant operators prefer searching
for experienced partners.
EnviTec Biogas AG covers the entire value chain for the production of biogas
- including the planning and turnkey construction of biogas plants as well
as their commissioning.
The company provides the biological and technical service, and also offers
full plant and operating management.
- How does a biogas plant work?
Regardless of where an EnviTec biogas plant is operated, the basic principle
is relatively simple. Renewable input materials from farming, animal manures
and waste materials from the food and agricultural industry serve as input
Agricultural biogas plants
- Because of the variety of economic and ecological
benefits it affords, many farmers set up biogas plants as a further source
of income. Utilising renewable raw materials and other agricultural products
contributes to value creation in rural areas. An efficient recycling economy
is the result – reaching all the way to the use of fermentation residues as
- Many farmers use biogas production to establish a second
economic mainstay, thereby ensuring that their agricultural enterprises
continue to flourish into the next generation. Because energy generated from
biogas is not subject to price fluctuations, it represents a reliable source
Farmers additionally save on long-term energy costs when they use exhaust
heat from the co-generation unit to heat buildings or stables. The exhaust
heat can also be marketed via local heating networks to external purchasers
to further increase profits.
An alternative to the generation of electricity from biogas is upgrading it
to valuable bio natural gas.
Higher added value
- Decentralised biogas production using independent
resources strengthens value creation in rural areas. Using renewable
resources effectively reduces the dependence on foreign energy imports, so
that revenues remain in the region. More and more bioenergy villages are
showing us how biogas can be used to get the most out of local synergies.
This supports rural development and creates efficient cycles which represent
major contributions to environmental protection.
- No other use of energy is as efficient as biogas
utilisation in a co-generation plant. Because they simultaneously generate
both electricity and heat (hence "co-generation"), the efficiency of
cogeneration plants is considerably higher than that of conventional
large-scale power plants, which only generate electricity. Co-generation
plants convert between 80 and 90 percent of energy generated from biogas
into heat and electricity. By way of comparison: the average efficiency of
coal-fired power plants worldwide is 31 percent.
- Biogas can be generated from different renewable
resources. Instead of being tied to a certain crop type, farmers can adapt
flexibly to different framework conditions. Even catch crops, whole-plant
silage and energy beets deliver top yields. Plant operators can also
integrate businesses from the local community to procure substrates.
Waste to energy
- Every farm or food enterprise generates by-products
which are eminently suited to biogas production. The targeted utilisation of
organic waste can help generate energy and heat. This lowers overall
production costs and is also good for the environment. In short: what you
would normally dispose of is a valuable source of energy.
- Biogas is produced through the fermentation of organic
substrates. Many waste materials are suitable for this process, such as
those permanently available in factories from the agricultural, food and
vegetable-oil industries. Be it food waste, glycerine, slaughterhouse waste
or vegetable/animal fat: our biogas plants have an optimal technical design
to ensure that these waste materials produce the best possible yields as
- The efficient utilisation of organic waste in biogas
plants creates a cycle of economic sustainability: Continuously generated
by-products can be profitably employed to produce electricity, heat or bio
natural gas. This reduces the accumulation of waste which production plants
would otherwise have to dispose
- Specific local conditions, locally available substrates,
the most efficient possible utilisation of generated exhaust heat in the
respective production facility – every biogas plant is different. We develop
a customised concept for your project which accounts for the respective
conditions. We can provide you on demand with a turnkey plant with which you
can utilise the organic residues you have available for optimal energy
Good CO2 figures
- Thanks to the high energy yield in EnviTec "wasteto-
energy" biogas plants, the required amount of fossil fuels has been reduced,
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
Envi Than biogas upgrading
- Gas separation
by means of a polyimide hollow-fibre-membrane
Biogas is becoming increasingly important as a local, decentralised and
environmentally friendly source of energy. Particular potential is afforded
by upgrading biogas to biomethane which can be fed into the public natural
With EnviThan, EnviTec is offering a highly efficient technology for
upgrading biogas – gas separation with SEPURAN® Green by Evonik. This
process increases the amount of high-energy methane from approx. 50 percent
to up to 99 percent.
FROM BIOGAS TO HIGH-ENERGY BIOMETHANE
- Biomass fermentation produces a gas mixture of methane
and carbon dioxide, as well as small amounts of hydrogen, hydrogen sulphide
and, in some cases, ammonia. The higher the rate of methane, the higher the
energy content of the gas. In the process of upgrading biogas to biomethane
with natural gas quality, the crude gas is first cleaned and compressed.
Then the most important process steps follows: the thorough separation of
CO2 and water vapour by means of a highly selective hollow-fibre-membrane
Energy for the public gas grid
- The membrane technology exploits the fact that gases have
different permeation speeds and solubility properties. CO2 molecules are
smaller than methane molecules, are more soluble in polymers and therefore
pass through the microspores of the membrane more rapidly. While the
majority of the CO2 and water vapour permeate the molecular screen, the
valuable methane concentrates on the high-pressure side of the membrane. The
upgraded biomethane is transferred to the supply station where it is further
treated by the network operator or directly fed into the natural gas grid.
The CO2-enriched exhaust gas is post-treated in a regenerative thermal
- Successful design, progressive technique
The EnviThan membrane technology using the SEPURAN® Green membrane modules
developed by Evonik boasts essential advantages in comparison with other
technologies: It is environmentally friendly, considerably more energyand
cost-efficient and much more flexible. EnviThan is the ideal solution,
especially for a future decentralised energy supply using a large number of
Simple modular design
- The EnviThan biogas upgrading system is simple and robust
as well as compact and space-saving. Components for desulphurisation,
compression, condensation, filtration and gas separation can be installed in
closed containers. Thanks to the modular design, every system can be adapted
to the individual performance requirements of the operator. So any number of
modules can be linked depending on the plant size..
Hollow fibre membran for gas separation
- Every SEPURAN® Green module consists of several thousand
very fine hollow fibres whose ends are embedded in resin and then bundled
within a stainless steel tube. The fibres are manufactured from high
performance plastics design with high pressure and temperature resistance.
The membranes are characterised by having excellent selectivity properties.
This results in an extremely low loss of methane when the separation of CO2
and methane occurs with the added advantage of requiring lower energy input
to achieve it.
High performance through separation and pressure
- Pressure is applied within each module by compressing the
crude biogas. The resultant pressure difference between the retentate and
permeate sides creates the separation of CO2 and water vapour whilst
retaining the methane. The advanced technology of the hollow fibre SEPURAN®
Green system and its excellent selectivity, i.e. permeation of the CO2 and
retention of methane, makes it possible to achieve rates of less than 0.5%
methane passing through the membrane and retention of a gas with up to 99%
The advantages - flexible, energy saving and efficient
Up to 99 percent methane content
- Thanks to the highly selective hollow-fibre membrane, the
EnviThan technology increases the methane content to up to 99 percent. In
addition, it is also possible to reduce methane slip to less than 0.5
Profitable for smaller and large biogas plants
- The EnviThan gas upgrading system is suited both
technically and financially to smaller and large biogas plants. Thanks to
the low investment costs, an EnviThan system operates economically even with
small amounts of crude gas.
Higher flexibility thanks to modular design
- Thanks to its modular design, the technology can be
installed in a quick, smooth and cost-effective way and adapted flexibly to
different quality standards and performance capacities.
Cost-effective and environmentally friendly
- Unlike other gas separation methods, EnviThan technology
requires no chemicals, no water and no other resources. That makes EnviThan
cost-effective and environmentally friendly, as it generates no waste water.
Compact and inconspicuous
- An EnviThan system is especially space-saving.It is
delivered in a containerised format which generally do not require major
No gas drying required
- EnviThan technology requires no further gas drying
following the separation process. When the product gas leaves the membrane,
it is sufficiently dehumidified to be fed directly into the public gas grid.
Robust and low-maintenance
- The technology is simple and robust. This reduces the
demands on operation and maintenance which, in turn, saves on time and
costs. The membranes are extraordinarily durable and generally maintenance
- In comparison to other processes, EnviThan technology
requires very little energy. In addition, much of the heat generated during
the upgrading process can be recovered and utilised.
Low pressure loss
- The upgraded gas must have the same pressure as the
natural gas in the grid in order to be fed into the grid. Whereas in other
processes the pressure of the product gas is insufficient and the gas must
be subsequently compressed, gas upgraded using EnviThan technology can often
be fed directly into the public grid...
Short start-up times
- An EnviThan system can be started up and shut down within
a short time. The start-up time until full performance capacity is reached
in only a few minutes. Even operation under partial load is no problem, as
it is easily regulated via pressure and volume flow.
- All-round service and security for trouble-free
Our outstanding market position is attributed to our comprehensive services
and the high quality of our products. EnviTec offers an all-round worry-free
package – from planning, to financing and insurance, to commissioning,
maintenance, and support. Thanks to our service offering the average
efficiency of plants supported by EnviTec is greater than 90%
- Starting up
Our biological service sees you through the start-up of your new plant at no
extra charge and later you can get this service optionally at extra cost.
This service does not only consist of plant data collection of the biogas
facility by daily dialing into your host system but also of regular visits
to your plant by our staff as well as schooling of the operator in your own
Additionally we conduct regular testing of the fermenter biology and the
fermenting potential of the input substances for accurate feeding
recommendations and thus the optimal efficiency of your facility
In our laboratory input substances and fermenting residue are examined for
all important parameter and fermenting testing with different input
substances is conducted.
Our scientific staff compares the quality of the different substrates by
help of a data bank. Hence we can give you accurate feeding recommendations.
For checking the gas production in the running facility the real production
is compared to the gas prognosis on a daily basis. This way, discrepancies
can be detected at an early stage. Thus you can intervene and go against it
at an early stage.
- The best service for your facility
Regular servicing and prescribed maintenance of all facility components
protect against loss of income due to stand-still and breakdown. By using
our technical service operators have the choice between part-time and
full-time maintenance with take-over of the repair risk by EnviTec. If
desired our trained specialists will also tend to the maintenance of BHKW
including auxiliary drives, gas-, pump-, and agitator technology as well as
24 hour service
In case of emergency our technical service is there for you – 24 hours a
day. Short delivery periods for important parts that have failed are our
specialty. All components are on stock at all times. The standardised
module-system by EnviTec offers crucial advantages – our facilities contain
many non-variable parts, irrespective of the size of your plant.
- Besides building biogas plants for customers, EnviTec
invests in and operates own biogas plants. These plants are operated
together with partners from agriculture or industry and thus combine local
expertise and competent management with technical know-how by EnviTec.
In a partnership EnviTec will provide the following
We seek a long-term relationship with our partner, which means that the biogas plant is jointly operated for at least 20 years. The partner provides the location and agricultural products and residual materials as input material.
Together with our partner we will gladly calculate the profitability of the project, taking into account all location-specific factors. Different factors when planning a biogas plant make each location special and need an individual assessment.
- Assistance in choosing the right location for a plant
- Overall project management such as preplanning and authorization
- Provision of external expertises and certificates
- Building of the turn-key plant and approval by the authorities
- Connection of the plant to the public power grid and completion of contracts
concerning connection and the feed-in of electricity
- Maintenance work and repair
- Handling of all commercial aspects
Advantages and requirements
- The clear advantages of our partnership model are:
The following requirements must be fulfilled:
- Manageable equity investment
- Limited liability
- Financing negotiations
- Common operating risk
- Selection of raw materials and their contracts
- Meetings with the energy supplier
- Formulation of heating concepts
- 51% (or more, if applicable) of the company's shares are held by EnviTec
Biogas AG. Preferrably with inclusion of the existing operation
- Project-based financing
- Long-term assurance of input and output (corn, rye, liquid manure, digestate)
Our references - Biogas plants tailored to customers'
- Biogas plants for customers from agriculture or biogas
parks in industrial scale - EnviTec Biogas offers customers worldwide
Currently we have installed more than 202 MW of plant capacity. 46 MW are
under construction at the moment. (as at 31.12.2010)
These pages will give you details on some of our projects. To get an
overview of all realized projects by EnviTec please take a look at our list
The biogas plant in
Bakum / Germany
The biogas plant
in Casalvolone (Italy)
The biogas plant in Bergharen