This manuscript presents the registration process of a purple phototrophic bacteria (PPB) pilot plant and the development of a model in extended reality with the A-Frame framework. In this first phase, the space has been registered with a 3D scanner and from photographs, and a first scalable prototype has been modelled to investigate the design of interactions and the implementation of content information layers.

For the development of this first model, the A-Frame framework has been used, with the intention of scaling its development by adding layers of information and interactions at different levels, and trying to analyse the most appropriate option for the implementation of triggers depending on the content and format to be used. All phases of the process for the standardisation of the development of this prototype are taken into account, from documentation and blockout to modelling and texturing, and taking into account the distribution of the spaces.

The pilot-scale system has been designed for wastewater treatment using purple phototrophic bacteria (PPB), and consists of the following main sections, which have been integrated into the model developed in A-Frame: Homogenization tank, Primary Truncated Cone Settler, Pilot-Scale Anaerobic Open Raceway Photobiorreactors, a Secondary Truncated Cone Settler for Biomass Recovery, and a SCADA Control System.

These five components of the pilot plant have been recreated to scale with 3D modelling technologies and integrated into the framework in extended reality format for visualisation by users and the design of future scalable versions at the level of implementation of interactions, as well as the assignment of functions to these components.

The model developed in this manuscript is a prototype that serves as a basis for scaling it to different functions, including, fundamentally, educational, informative or training and practice.

The aim of this text is to show the educational potential of extended reality and, in particular, virtual reality, as well as the scalability of the technology and its interoperability for the development of immersive and interactive multimedia content, and to represent different levels of information in the field of science and technology.

Keywords: Virtual reality, extended reality, immersive technologies, media, 3D environments, science communication.