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  • Offer Profile
  • Renewable energy from biogas plants

    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.
     
Product Portfolio
  • Biogas Plants

  • Biogas - the allrounder among renewable energy

    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 subject to any price fluctuations. At the same time, a biogas plant actively contributes to environmental protection and energy mix of the future.

      • Agricultural biogas plants

      • 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.

          • 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.
          • Added value for the region

          • Decentralised biogas production using independent resources strengthens the added value 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.
          • 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.
        • Waste to energy

        • 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.

          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.
          • Odor-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.
            • 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.
            • Pre-processing and disintegration

            • In order to ensure that the raw materials are fermented in the best possible manner, they must be broken down to the highest possible degree. Our patented Kreis-Biogas-Dissolver optimally mixes and shreds the input materials to a fine dimension, thereby increasing the biogas output. Various other mixing devices ensure that substrates of varying consistencies can be fed in.
            • Production of biogas in the digester

            • In the heated and air-tight digester, the biomass ferments in conjunction with the production of methane, the so-called biogas. The resultant residual product, i.e. the fermented biomass, can be used instead of expensive mineral fertilisers as a low-odour, natural fertiliser in the agricultural or horticultural sector. The filtration of the fermentation residues can also yield process water.
            • Combustion of the biogas in the CHP

            • The biogas is incinerated in the combined heat and power plant (CHP), and electricity for which compensation can be obtained is generated. The accruing heat can either be returned to the respective company or fed into the district heating grid. The CHP can be regulated in terms of its utilisation. Consequently, it can correspond to various remuneration regulations and be complemented through other heating concepts.
            • Production of electricity, heat, bio-natural gas and fuel

            • Biogas can be used in a variety of ways: It can be used to produce electricity and heat for private residences, and it can also be used to supply public buildings or the selfsame manufacturing company. Apart from that, biogas can be channelled into the gas grid after it has been processed into biomethane. It can also be utilized as a fuel that may, for example, be used to facilitate motor vehicle transportation or the actuation of in-house motors.
          • Water Treatment

          • EnviDrain and EnviClear - the all-in-one solution for clean surface water

            At biogas plants, highly contaminated surface water is found near roadways and silos. Channelling this into ditches and waterways is increasingly frowned upon by surveillance authorities and the general public. As an alternative to the expensive construction of new storage containers, our subsidiary A3 Water Solutions GmbH has developed EnviDrain and EnviClear: a low-cost, all-in-one technical solution for the handling of contaminated surface water. The solution works by preventing soiling in the first place while also reducing its environmental impact.

            Prevention - EnviDrain

            The compression of maize silage means that the silage effluent cannot drain away through the installed gullies as intended. In addition, the gullies on the silage slab often become clogged with maize, resulting in effluent becoming backed-up. It then spills over the sides, where it mixes with rain water.

            This is where EnviDrain comes in: it offers a clog-free drainage system for the effluent. The special fleece material increases the effective drainage surface area 500-fold, keeping rain water clean and allowing contaminated water to be properly routed to the biogas plant.

            The EnviDrain material is easily installed before silage storage and can be driven over safely even if covered by only a shallow layer (30 cm) of maize.

            Routing - The intelligent separator

            Often, rain water and highly contaminated surface water end up in the same tank – whether due to a failure to separate silage effluent and rain water or as a result of rain water runoff being collected from soiled roadways.

            To lessen the burden on the downstream EnviClear plant while making effective use of organic materials, an intelligent separator is used at this point in the system: it measures the contamination level and decides how the water should be routed automatically.

            Upstream of the catch basin, the separator sends

            • highly conatminated water to the biogas plant; and
            • moderately or slightly contaminated water to the EnviClear plant

            Treatment - EnviClear

            To ensure compliance with threshold values for discharges, even moderately or slightly contaminated water must also be treated:

            it is therefore collected in a tank and pumped to the EnviClear plant as a continuous process. The lowmaintenance EnviClear process is based on the proven membrane revival method, a combination of biological degradation and membrane filtration. The pores in the MaxFlow membranes used are so small that only water molecules may pass through them – but bacteria and particulates are trapped. As a result, only clean water is discharged.

            If necessary, we can provide you with a packaged solution, consisting of planning, construction, service and operation monitoring.

              • Digestate Treatment

              • Innovative, economical and sustainable: Our digestate processing using the membrane process

                Owing to their nutrient density and decreased odour, fermentation residues are exceptionally suitable as fertilisers. But how can we save storage and transportation costs and still protect the environment? Our subsidiary, A3 Water Solutions GmbH, has developed a holistic modular concept for the processing of accumulated fermentation residues. The membrane process separates the fermentation residues into solid and liquid parts and thus provides fertiliser products that can be transported, stored and sold. Nutrients in the appropriate form can thus be distributed exactly at the places where they are required.

                The process results in three individually usable substances:

                • The solid substance is used as a soil additive or compost
                • The resultant liquid nutrient concentrate replaces the mineral fertiliser
                • The separated water is processed such that it is directly routed in the surrounding water body or  can be used as processing water

                We offer a personal on-site consultation to clarify whether a digestate processing system is worthwhile for your company and what benefits it will provide.

                  • Repowering

                  • Efficiency for your plant

                    You want to get the highest return of your investment? So do we. The new plant technology is far more efficient than it was years ago. Moreover, as the owner of the existing plant, you want to stay competitive. Your system can be most easily adapted to the latest technological developments. An investment in the" health" of your investment is worthwhile, because it usually pays for itself in a short time.

                    Depending on the plant quality we offer

                    •  Technology for better utilization of different input materials
                    •  Technology for the reduction of operation costs
                    •  Technology for a higher energy output
                    •  Technology to maximize storage capacity
                    •  Technology for biogas upgrading by EnviThan
                      • Case Studies Biogas Plants

                      • Sustainable reuse of waste materials? Benefits for manufacturing and municipalities!

                        Several companies and communes make use of the financial assistance that the political system provides for the realisation of the energy-related potential of waste management or just benefit from producing their own energy. Since the year 2002, we have developed technologies for biogas plants that produce impressive income from food waste, glycerine, slaughterhouse waste and fats.


                          • Prize-winning biogas plant in the USA

                            • Location: Stanley, New York
                            • Capacity: 541 kWel
                            • Input materials: Manure from 1,500 Holstein dairy cows, feed refusal, yogurt processing wastes, food waste
                            • Features: Since 2014, the average degree of capacity utilization exceeds 91%.
                          • Waste material recycling with a small footprint

                            • Location: Kishiwada, Osaka (Japan)
                            • Capacity: 249 kWel
                            • Input materials: Food Waste
                            • Features: Complete container solution, Power to the public grid, Heat utilization by the adjacent factory
                          • Flagship project in Linwood, N.Y., USA

                            • Location: Linwood, N.Y. USA
                            • Capacity: 440 kWel
                            • Input materials: Liquid pig manure and food waste
                          • Unpacking and cleaning of waste materials in Ribeauvillé (France)

                            • Location: Ribeauvillé (France)
                            • Capacity: 1,4 MWel
                            • Input materials: Cattle slurry, renewable resources, waste materials from the food industry
                            • Features: Separate hygienisation plant with a capacity of 25,000 t/a.
                          • Heat and electricity for L’Oreal

                            • Location: Libramont (Belgium)
                            • Capacity: 3,2 MWel
                            • Input materials: Maize, food waste, fats
                            • Features: The plant in Libramont is unique in that it completely utilises the generated electricity
                            • and the heat that has been transformed into vapour within the factory itself.
                        • Biomethane – the renewables all-rounder

                        • Biomethane upgrading opens up a promising future market for the biogas industry. With feed-in into the public natural gas grid, the green all-rounder is perfect for the decentralised supply of energy, offering a long-term replacement for fossil natural gas and driving the energy transition forward. What’s more, the biomethane manufactured in the gas upgrading plant has the exact same properties as natural gas, being just as flexible in its usage and easier to store than other energy sources. Plus, it’s renewable.

                          How is this valuable bio natural gas produced?

                          Anaerobic digestion of organic materials creates a gas composed of methane and carbon dioxide. To upgrade the biogas to natural gas-quality biomethane, the crude gas is first purified and compressed. The membrane technology we use then exploits the different sizes and permeation speeds of the two kinds of gas molecules involved: since carbon dioxide molecules are smaller than methane molecules, they can migrate through the membrane much more quickly. As a result, the methane remains on the high-pressure side, while the CO2 molecules in the biogas pass through. As a result, the gas upgrading needs neither chemicals nor water nor any other resources.

                          The starting point for producing biomethane doesn’t have to be biogas, however.  After a preliminary purification stage, gas from landfill and wastewater treatment plants can also be used to produce biomethane.

                          The biomethane so produced is the all-rounder among renewable energy sources, and can replace fossil fuel-based natural gas anywhere it is used. On the following pages, you can find out about the many uses for this valuable and renewable natural gas, and how it can play a part in an environmentally-friendly energy supply system.

                          The advantages of biomethane at a glance:

                          • Flexibility of use
                            Whether in the home, as a carbon-neutral fuel (CNG) for the transport sector or converted on-demand into electricity and heat, biomethane is a true all-rounder that can also be used in a decentralised system
                          • Independent
                            Biomethane frees us from our dependence both on fossil natural gas and natural gas importers, thereby helping to support predictable long-term pricing trends in domestic energy market.
                          • Excellent public acceptance
                            Biomethane is renewable. This means heating consumers benefit from an improved CO2 footprint and potential savings resulting from the more efficient use of energy. As a highly efficient fuel, biomethane is also a star performer in the fuel market and can help to reduce emissions many times over.
                          • Strong market potential
                            Since crude gas sources and gas grid infrastructure are both available, neither time nor capital investment is necessary to establish them. On the contrary: the use of biomethane can unburden the electricity network and contribute to a temporary easing of cost-intensive upgrading work.
                          • Regional value chains
                            Biomethane promotes economic growth both in the feed-in region – which is in the immediate vicinity of the gas generating plant – and in the consuming region, which is independent of the feed-in location.
                          • An additional pillar for your business
                            Since our gas upgrading systems are exceptionally efficient and cost-effective, they can offer biogas plant operators another attractive source of revenue from biomethane production.

                           

                            • Technology

                            • EnviThan gas upgrading – refreshingly simple and flexible

                              Before biogas can be fed into the natural gas grid or used as a fuel, it must first be upgraded to natural gas quality. Our answer to the requirements of the future is therefore EnviThan – our integrated solution from organic waste to the filling station pump!

                              Our technology and your advantages at a glance:

                              • Integrated model
                                Our EnviThan model offers you a tailor-made solution along the entire value chain, from the initial pre-treatment of your raw gas, gas upgrading into biomethane, various options for gas marketing (CNG, electricity, heat), and all rounded off by our comprehensive after sales service.
                              • Straightforward, compact and modular design
                                EnviThan gas upgrading is simple and robust while also being compact and space-saving. The components for desulphurisation, compression, condensation, filtration and gas purification are installed in self-contained modules. Thanks to its modular design, the technology can be installed quickly and easily, and flexibly adapted to the specific quality standards and performance capacities of each operator. The system is also designed to ensure impressively low maintenance costs. The modular construction of an EnviThan plant also offers plenty of reserve capacity, making subsequent expansion of the plant easily possible.
                              • Strong partner
                                We use SEPURAN® Green modules from Evonik Industries for the membrane separation process in our gas upgrading plants. These hollow-fibre membranes purify the raw biogas generated in the biogas plants from 50 to over 97 percent by volume – a very high figure compared with other technologies. The successful partnership between EnviTec and Evonik is not only reflected in the fact that we are the world’s largest buyer of these leading Evonik modules, but also in the fact that EnviTec is the only company worldwide that operates an internal gas upgrading plant for the purpose of carrying out R&D into these innovative membrane systems.
                              • Rapid controllability for short start-up times
                                Our gas upgrading plants have short start-up times and can be quickly adjusted to changes in volume flow rates thanks to good controllability. This guarantees the simple and flexible operational management of EnviThan plants.
                              • Extremely efficient
                                Compared with other approaches to biogas upgrading, EnviThan technology requires less energy, which ensures its running costs stay as low as possible. Nor does this gas upgrading method require any chemicals, water or other resources. Much of the heat generated during the upgrading process can also be recovered and utilised. Compared with other methods – such as amine scrubbing, pressure swing adsorption or high-pressure water scrubbing – it is also inexpensive and environmentally friendly since it produces no wastewater or emissions.
                              • Top quality and maximum safety – Made in Germany!
                                Quality is our top priority at EnviTec Biogas. To ensure we can meet our high standards at all times, all EnviThan plants are designed and built at our facility in Saerbeck (Germany).  In addition, we also work only with hand-picked suppliers that share our commitment to quality – and our business relationships with these suppliers now go back many years.
                              • Seasoned expertise
                                Apart from the efficiency and technical quality of our gas upgrading systems, our long-standing international expertise in biogas plant construction is another reason why customers worldwide entrust their projects to EnviTec. Germany, UK, France, China and Denmark – EnviThan is conquering the gas upgrading market on a global scale. 
                                • Gas to grid - our biomethane projects!

                                • EnviThan gas upgrading – a global success story

                                  Cost-effective, efficient and reliable technology, plus smart business models that cover the entire value chain for the biomethane market. Our expertise is in demand worldwide.

                                    • From the source to the steering wheel: EnviThan makes inroads into fuel market in China

                                      • Location: Penglai City (Shangdong province, China)
                                      • Capacity: 2 x 1000 Nm³/h biomethane
                                      • Input materials: Poultry litter from the owner’s approx. 1 million head of poultry
                                      • Features: This plant is the first biogas upgrading plant from EnviTec Biogas in China. Both of the structurally identical EnviThan upgrading systems, each with a capacity of 1.000 Nm³/h biomethane, deliver bio-CNG (compressed natural gas from biogas) as the end product of biomethane treatment. The bio-CNG is used as a green fuel in the company’s own filling station and in the nearby city of Yantai.
                                    • We make efficient technology even better – with our own R&D plant to ensure optimal results

                                      • Location: Sachsendorf (Germany)
                                      • Capacity: 350 Nm³/h biomethane
                                      • Special features: Whatever our many successes, we don’t rest on our laurels. We work continuously on the further improvement and optimisation of our technologies. In the EnviThan demonstration plant that we run in Sachsendorf, Germany, the components and materials are operated to the limits of their capacity, and the results analysed in order to ensure an optimal plant design and control response while extracting the maximum possible added value and efficiency. Forward-thinking, reliable and efficient – EnviThan.

                                    • Energy for 2,150 households: our flagship project in Icknield (UK)

                                      • Location: Ipsden, Oxfordshire (UK)
                                      • Capacity: 700 Nm³/h biomethane + 360 kWel CHP
                                      • Input materials: Pig slurry, farm by-products, energy crops
                                      • Special Features: The plant is capable of supplying enough gas to meet the annual needs of around 2,150 households. The subsequent reuse of the digestate as fertiliser also helps to reduce the use of chemical fertilisers by local agricultural businesses.
                                    • Compact, modular design offers customers maximum flexibility: EnviThan gas feed-in France

                                      • Location: Senlis (France)
                                      • Capacity: 130 Nm³/h biomethane
                                      • Input materials: Silage, sugar beet pulp, agricultural waste
                                      • Special features: This is EnviTec’s first gas upgrading plant in France. Our Senlis-based customer enjoys multiple benefits from the compact, modular design used by EnviThan plant. Thanks to the quick and easy installation of the technical systems, the operator started feeding biomethane into the local gas grid after a construction period of just ten months. The modular design of EnviThan plants and the built-in performance reserves also offer a straightforward approach to expanding gas upgrading capacity. 
                                    • Proven technology + reliable after sales service = satisfied customer!

                                      • Location: Hammel (Denmark)
                                      • Capacity: 1335 Nm³/h biomethane
                                      • Input materials: Grass silage, sugar beet, straw, turkey litter and glycerine
                                      • Special features: Our customer is Denmark’s largest land-owner, with over 10,000 hectares to its name. Apart from our efficient EnviThan technology, we also impressed the client as a solid partner with a portfolio of successful international references. EnviTec’s flexibility and the reliability of our gas upgrading plants, plus our comprehensive – and local – after sales service were decisive factors for winning this contract. And we continue to impress: the customer has already made multiple expansions to the plant.