ADI®-AnDGF is a contact anaerobic biological pre-treatment system that uses a dissolved gas flotation (DGF) system for the clarification of biological solids and removal of product solids and O&G. The biological solids are returned to the contact anaerobic reactor to maintain treatment levels in the reactor.

• Pretreatment with of wastewater with high BOD concentrations (> 2,000 mg/L)
• Wastewater that contains moderate to high levels of product TSS and O&G that ordinarily would require physical/chemical pretreatment prior to anaerobic treatment

• Save on energy costs
• Low energy consumption design
• Significantly less energy-intensive than aerobic systems
• Recover energy from biogas to reduce plant’s fossil fuel usage
  • Eliminate wastewater surcharges
  • Reduce or eliminate chemical usage

• Continuously meet discharge requirements
• Convert organic waste to recoverable green energy (heat and power)
• Waste sludge suitable for land application as liquid fertilizer due to high nutrient content
• Improve local and global water security

• Yields higher quality effluent than other anaerobic processes
• Does not require difficult to maintain granular sludge or expensive media
• Has a much lower sludge yield (up to 90% less) than aerobic processes
• Requires considerably less electricity (up to 95% less) than an aerobic process
• Can better sustain slug loading than an aerobic system
• Produces higher solids sludge (up to 8%), lower sludge volume than other biological processes
• Produces methane-rich biogas, use-able as a plant energy source

• Few equipment and moving parts results in low maintenance requirements
• Minimal operator attention
• Flexible sludge wasting program
• Data trending for process control
• Cover provides easy access for sampling and maintenance