Biogas Plants


As a part of OWS, the DRANCOTECH division is performing its business operation within the context of an ISO 9001:2015-certified quality management system.

On the one hand, it demonstrates that we are capable of consistently delivering products and services which meet client demands and statutory and regulatory requirements. On the other hand, we focus on assuring and improving client satisfaction by means of applying the system, including through continual improvement and quality assurance.

All other activities within the DRANCOTECH division are carried out as much as possible in line with ISO 9001.

With the help of the ISO 14001 standard, an environmental management system has been set up at OWS to develop an environmental policy appropriate to the organization and to guarantee its implementation. In this way the environment can be systematically taken into account and a continuous improvement of our environment can be realized. The purpose of the environmental management system is to create added value for the environment, for OWS itself and for our stakeholders.

The ISO 14001-certificate can be found here.


(To find the OWS-certificates on the SGS-website: please search for company name: “organic waste systems” and location: “Belgium”.)



OWS est un leader mondial dans la construction et l'exploitation des digesteurs anaérobies, en contrôle de la biodégradabilité des polymères et des conseils sur la gestion des déchets.