The project consists of a biogas plant in Waalwijk. The system aims to produce biomethane (green gas) from different waste flows, such as roadside grass, vegetable waste, flotation sludge and supermarket waste. The installation consists of a supply of solid and liquid substances, digester installation, separator for waste water and solid substances, water purification, heat recovery, gas refining and biogas analysis for the network supply.


The assignment

As from the start of this new construction project, the lead time was very tight and we had to pull out all the stops in order to realise the ambitious planning. We decided to split the installation of the system into 4 parts so that all components could be completed on time. The first part of the installation to be completed was the digester with its supply. Following the completion of this step, the fermentation installation could be filled with digestate so that a few weeks later, gas would be produced ready to be refined. In the time required for the process to get going, we first supplied the waste water separator and then the water treatment system so that the released waste water could be processed and the process could maintain momentum. The last part to be completed was the gas refining system, with its own control panels and software, which meant that green gas could be supplied to the gas network.


The work

  • engineering and constructing the control panels and RIO panels for the fermentation plant;
  • engineering and constructing the control panels for the waste water separator;
  • engineering and constructing the control panels for the water purification system;
  • engineering and constructing the control panels for the gas refining system, including a 330kW frequency controller;
  • installing cable ladders;
  • installing all field and supply cables;
  • testing the entire installation;
  • creating software for the different components and integrating the software into the existing control system. The overall control system was operational on site from the start, but other software components had to be developed in-house due to the short lead time;
  • special, self-contained software for the gas refining system, so that it could be sold as a separate unit;
  • a continued development stage and cooperation with the customer to improve the operation of the first full-scale gas refining system.

As a result of a long-term relationship with HoSt, a standard package has been developed in Proleit software in conjunction with a Siemens PLC for their fermentation plant. This Proleit software package enables users to gather more information from the control system than is the case with standard packages and, provided this information is released, it can be adjusted if necessary.



A project that was completed very quickly, but also retained its flexibility. With the help of RIO panels, Proleit software and flexible staff, we have been able to make adjustments until the end of the project.
We are also able to offer efficient support for service and maintenance work with remote assistance for visualisation and PLC software.