BioSTAR™ AD CSTR System

Modular high performance CSTR (continuous stirred-tank reactor) anaerobic digestion systems.

BioSTAR™ AD CSTR (continuous stirred-tank reactor) biogas systems offer an advanced solution for efficient biogas production with significantly lower capital costs.

The BioSTAR AD reduces reactor volume and capital expenditure by up to three times compared with conventional CSTR technology, making it an ideal choice for projects that need compact, high-efficiency systems.

Hart Bioenergy - STAR Biogas System
ROUND Biogas System
  • Factory built and tested: Ready for plug and play operation for low setup and operating cost with high throughput.
  • High-Solids Content Processing: Manages up to 20% solids within the reactor, optimising high-rate biogas production
  • Space-Efficient Design: Built to operate in settings with space and height limitations, this modular digester handles high volumetric loading rates without compromising treatment efficiency
  • Reliability and Performance: Engineered for stability and high performance, offering a cost-effective (CapEx-friendly) option without sacrificing durability or efficiency

The Base System provides automated controls for the digestion tanks, biogas management and measurement, pretreatment, pumping, heat exchangers and biologic processes.


Uniquely suited to treat high salinity, nitrogen and sulphur waste streams.


High biogas output, plus biofertiliser product for full circularity. Maximum gas bubbles through a granule sludge bed, result in maximum water cleaning for easy post treatment and water reuse potential.


Excellent biomass capacity for stable digestion.


Low energy requirement for operation.


Superior gas and liquid separation of high strength wastewater streams.


Completely closed reactor to minimise emissions.


Compact design with small footprint.


Efficiently handles high COD load with low retention time.

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