Biogas plants installed by Biogas Nord use a digester through-flow procedure, which involves the operation of one or more digester through which substrate is continuously fed. The digester and storage containers built by the company are stationary, cylindrical containers made of reinforced concrete. Their size, quantity and equipment depend on the type and quantity of the input substances being treated.

Powerful pumps or apparatus for loading solids such as conveying screws or sliding floors are used to load the raw materials. Substrates for co-fermentation plants must be hygenised – heated to a pre-defined temperature – before being loaded into the digesters. The digesters are fitted with up to four stirring devices and double membrane roofs for the purposes of gas storage. The double membrane comprises an inner film for holding the gas, and an outer film to protect against the weather. Wall and floor heaters are installed inside the concrete walls of the digester. The exterior walls of the digesters are thermally-insulated, and are also lined with trapezoid bodywork.

After cleaning the hydrogen sulphide content from the biogas it is converted into electrical and thermal energy in an electric generator. Part of the electrical energy produced is used for the energy needs of the biogas plant itself, the rest is fed into the public electricity network. Part of the generated thermal energy is utilised for heating the digesters, while the excess heat can be used to heat residential homes and buildings, as well as in agricultural or industrial processes with high thermal energy requirements.

Planning

Based on a detailed questionnaire, Biogas Nord draws up the optimal design for the plant, including a comprehensive profitability analysis tailored to the specific plant. This gives the site owner a breakdown of the required investment, the expected biogas and energy production and the expected profitability of the biogas plant. Then implementation plans for the construction of the plant on the premises are drawn, and the necessary approval documents which provide support for public funding applications are compiled.

Permitting

We draw up the implementation plans for the construction of the plant on your premises, compile the necessary approval documents and provide support for public funding applications. In this way Biogas Nord relieves you of the responsibility for drawing up the documents permitting the construction and other legal and administrative procedures, and administers the approval process right up until the granting of approval.

Construction

Biogas Nord’s team of qualified and experienced personnel made up of engineers, biologists, business management specialists and technicians accompanies you every step of the way, from the planning phase to construction, down to the commissioning of the biogas plant.

Biogas Nord assumes responsibility for the full implementation of the entire construction scheme with its own project and construction managers and competent and experienced assembly teams.

Start up

Once the building of the plant is completed, the plant undergoes the start-up phase. The optimal substrate composition is found. Then bacterial flora is developed with injected serum slurry, the fermenter is heated externally, and the feeding quantities and times are adjusted.