Aerobic Digester

Product Code: JL--6629

  • Aerobic Digester Aerobic Digester consists of a 2 gallon  reactor vessel mounted on a steel base, with a liquid feed pump, air  supply, and instrumentation for monitoring and controlling the  process.          
  • The cylindrical wall of the reactor is made from 2 layers of  porous plastic material to retain the suspended solids, while allowing  treated water to pass through to the outer, annular exit chamber.
  • This  design allows the essential features of the aerobic treatment process to be studied without the distractions of having to settle the solids  adequately enough for external recycle, a well known laboratory  problem.
  • The porous liners are removable for cleaning, and a spare liner is supplied.
  • Waste water is drawn from a feed tank by a 120V motor driven peristaltic pump.
  • Flow rate is controlled by a variabe run time control that determines the minutes of run time within a 10 minute cycle.
  • The  pump delivers the feed to the reactor vessel through a transparent lid.  
  • Air is supplied at a measured rate by a small air pump, and discharges  into the base of the reactor via an air distribution device.
  • This  provides the necessary oxygen for the digestion process, as well as  produces sufficient bubbling for stirring and reaction.
  • The liquid level in the reactor is maintained at a constant value of 1 or 2 gal. by an  overflow device connected to the outer annular chamber of the vessel.  
  • Discharge is by gravity to a floor-standing product tank (not supplied).
  • The reactor temperature is maintained by a 3-term PID controller which  varies power to an immersion heater within the vessel.
  • Any temperature  between ambient and 95°F may be selected, with the best conditions being a few degrees above the diurnal maximum in the user’s laboratory.
  • Dissolved oxygen and pH probes and meters are included.
  • The reactor lid contains a gas exit port, suitable for sampling the gases for subsequent analysis Specifications Feed pump 120V, peristaltic, 10 rpm, variable run time control corresponding to 0–13 gal. per day.
  • Air pump 240V/120V, 0–1.35 gpm Reactor vessel 2 gal. maxium  capacity pH meter Range 0.00 to 14.00Dissolved oxygen meter Range 0–100% saturation, resolution 2%Reactor heater Electrical immersion  250WTemperature controller 3-term PID, temperature limit set at 95°F  Chemical Engineering Laboratory lab equipment manufacturers, exporters and Chemical Engineering Laboratory Lab suppliers
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