Home installation – How it works

The regenerated living water in our system is free from pathogens and safe to humans.

Nexus by Sweden designs and delivers dynamic recirculating systems for the onsite treatment of residential wastewater. The system is based on natural processes and complete microbial food webs. Hence, the system does not generate any waste nor requires the addition of chemicals or a regular maintenance.

This is a small-scale but scalable solution, with multiple added values for the surrounding landscape, water security and economy.Inorganic solids in the household wastewater are separated first. Water then undergoes anaerobic fermentation where most of the organic material is converted into simpler organic molecules. The process is sustained by extensive microbial biofilm on fixed biofilm carriers. The biofilm consists of native microbial communities (biome) supplemented by specialist bacterial consortia. The key factors behind the efficiency of treatment at this stage are retention time, optimal temperature, pH, oxygenation-reduction potential (ORP) and the nutrient ratio.

That water is then further processed in a highly aerobic stage consisting of plant-root zones supported by expanded tubular structures.  The key factors ensuring efficiency of the purifications process are, innovative and precise water circulation (hydraulics) and aeration. At this stage, high biodiversity of living components ensures flow of nutrients and energy between the system and the surrounding terrestrial ecosystem. There are also possibilities for recovery and reuse of essential nutrients, such as phosphorus.

The purified water can either flow into an additional planted biochar bed or be stored in the constructed or natural retention. The stored water provides a valuable source of usable water for irrigation, reuse in the household and recharging of the groundwater aquifer.

The natural system solution by Nexus by Sweden is an ideal solution for a single-family home but also for hotels, tourist facilities, and businesses, regardless of climatic, social-economic or environmental conditions. Services offered by this small-scale solution can be expanded into the management of water and wastewater for communities of up to 2000 inhabitants, often replacing outdated centralised solutions.