The Continuously Stirred Tank Reactor (ADI-CSTR) is a moderate-rate, complete-mix, anaerobic digestion process. This proven technology maximizes contact between the anaerobic biomass and degradable organics, making it a good choice for digesting difficult-to-treat waste streams with high concentrations of solids, and fat, oil, and grease (FOG). Additionally, primary sludge or waste activated sludge can be digested in the ADI-CSTR to further increase biogas production.  

A solids separation stage can be used to decouple the hydraulic and solids retention times, which can result in increased biogas production and stability. The ADI-CSTR can be paired with a membrane barrier, resulting in the cutting-edge Anaerobic Membrane Bioreactor (ADI-AnMBR) system that maximizes biogas production and generates the highest possible quality anaerobic effluent.

The ADI-CSTR can turn waste solids into green energy and offer the following advantages:

Cost Savings

  • Recover energy from biogas to reduce plant’s fossil fuel usage
  • Eliminate hauling of raw liquid/solid waste streams
  • Reduce trucking costs and tipping fees for solids disposal

Environmental Benefits

  • Convert organic waste to recoverable green energy (heat and power)
  • Alternative, energy-producing approach to handling solid waste streams as opposed to traditional methods such as landfilling or incineration
  • Improve local and global water security

Process Advantages

  • Digests the most difficult-to-treat wastewater and slurry streams
  • Consistent operation during variations in influent feedstock characteristics
  • Solids recycle for increased biogas production and stability
  • Easily upgraded to an ADI-AnMBR system

Simplified Operation & Maintenance

  • Consistent operation and performance
  • Geomembrane cover provides easy access for sampling and maintenance
  • Data trending for process control
  • Continuous biogas production rate results in simple integration with utilization source

Learn more about the ADI-CSTR wastewater treatment system:

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