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Your benefits in sight

From the outset, we at EnviTec have explored additional technologies that optimise the benefits of biogas plants. The development work was worth it: As the technological leader of the industry, we can offer you a number of additional technologies to further boost the added value of your plant. Here is an overview of some of these technologies:

EnviTec Kreis-Dissolver

This mixing technology can significantly accelerate gas production in the fermenter, increasing your gas yield. In a direct comparison with a conventional biogas plant equipped with a Rotacut shredder, a plant equipped with a circular dissolver grants an increased gas yield of 9% on average, with almost the same amount of electricity required (3.89%) compared to a conventional plant (3.78%).

The advantages at a glance:

  • Substrate conservation through higher gas yields
  • Increased fermenter workload through shorter delay times
  • Savings on agitator power in the fermenter
  • Better control of the fermenter through more rapid gas availability
  • More stable plant operation and therefore lower gas losses, higher CHP utilisation
  • Minimisation of settling in the digester

EnviTec Heatbox


Power-to-heat (P2H) gives HeatBox operators access to the benefits of the balancing energy market. The power output of a CHP can be rendered suitable for feeding into available district heating grids with the aid of P2H and the heat generatedby it.

The advantages of the HeatBox at a glance:

  •   Up to 100% of the power generated can be placed in the secondary balancing market
  •   The operator profits from the additional revenues
  •   It's easy on the environment: the heat produced is simultaneously used in an existing district heat   grid or by internal heat consumers

Pasteurisation of industrial input materials

Biogas plants can be operated using a very wide variety of input materials. If, for example, a biogas plant also uses industrial waste from the food industry - i.e. using "co-fermentation" - such waste will often first need to be pasteurised. The requirements of this pasteurisation process are governed by the EU Hygiene Regulation 1774/2002 of the European Parliament.

The Process:

Pasteurisation takes place in high-quality, sealed, stainless steel tanks fitted with heat insulation and plate cladding. During the process, the materials are heated to over 70°C for at least an hour to kill off bacteria and micro-organisms. Double-pipe heat exchangers are used for this purpose, heating the materials with hot water using a countercurrent exchange mechanism. The hot water required is provided by the biogas combined heat and power unit. Once the target value of 70°C has been reached, the material is stored for at least an hour in holding tanks. Afterwards, the pasteurised material is pumped into mixing tanks and substrate storage vessels. The quantities and mixing intervals can be controlled centrally from the control panel. EnviTec Biogas supplies and installs the complete sanitisation unit and connects it to existing control systems, so that the current state of pasteurisation containers can be viewed at all times.

Your contact

Your contact

Stephan Stiens

Managing Director
EnviTec Service GmbH

+49 (0) 4442 8016 7400
+49 (0) 4442 8016 97400