RCC Bio-Digester Hybrid STP
Zero-power anaerobic first stage, built for the long term
How it works
A hybrid of anaerobic digestion and aerobic polishing, built in permanent RCC civil construction. The anaerobic first stage removes a substantial share of the BOD and COD load with zero power input to the biological process, so only the polishing stage needs aeration — the lowest-running-cost option we build.
How the plant is arranged
Click any vessel to read what it does.
The lowest-energy biological train Aqua builds.
The diagram separates the zero-power fixed-film first stage from the smaller aerated polishing stage and shows the complete route to reuse.
Anaerobic Bio-Digester
Wastewater rises through structured PVC media where attached anaerobic biomass removes a substantial share of BOD and COD without aeration.
Process flow
Follow the numbered train from inlet to treated-water reuse. Click any stage for its engineering note.
Pre-Treatment
Bar screen and oil / grease chamber.
Why RCC Bio-Digester
Zero power input to the anaerobic biological process — the single largest operating cost saving.
40–50+ year structural life in monolithic RCC construction.
Large volumes buffer hydraulic and organic shock loads.
Suited to permanent burial and high water table sites.
Spacious compartments, standard equipment for maintenance access.
Lower lifecycle cost than prefabricated packaged alternatives.
Who it's for
Other technologies
Considering RCC Bio-Digester for your site?
Tell us your flow and footprint — we'll confirm the right sizing.