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Evoqua United States - Canada - EN

ADI® AnDGF

See All Anaerobic Systems

Anaerobic Treatment Process using Dissolved Gas Flotation (DGF) process as pretreatment

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  • Smaller footprint
  • Less operator intensive
  • Lower power and sludge handling requirements
  • Potential for energy production
Discontinued product
evoqa

Anaerobic Treatment Process using Dissolved Gas Flotation (DGF) process as pretreatment

  • Smaller footprint
  • Less operator intensive
  • Lower power and sludge handling requirements
  • Potential for energy production
Discontinued product

Description

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

Features

Costing Savings

  • 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

Environmental Benefits

  • 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

Process Advantages

  • 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

Simplified Operation & Maintenance

  • 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

Specs

Reactor Type (Organic Loading Rate)
  • Intermediate Rate