Circular wastewater treatment plants - VFL®

Small wastewater treatment plants with circular ground plan from AT30 to AT300 (transport with oversize transportation truck)

The compact, “one-tank system” wastewater treatment plants from AT30 to AT300 are comprised of a single vertical cylindrical tank, made from polypropylene - the biological reactor. The biological reactors can be transported ready-for-use by oversize transportation truck “convoi exceptionnel”.

The range of small wastewater treatment plants from AT30 to AT300 is designed for decentralized and semi-centralized solutions of wastewater treatment in the range of 3.8 up to 45.0 cubic meters per day (30PE-300PE).

The small wastewater treatment systems comprised of the biological reactors from AT30 to AT300 can be gradually expanded up to the capacity of 135 cubic meters per day (900PE) by installing several units in parallel.

Technical parameters of oval wastewater treatment plants from AT30 to AT300:

Type Max. no. of inhabitants No. of tanks Diameter Height Weight Daily inflow BOD5 load Power input Voltage
      [mm] [mm] [kg] [m3/day] [kg/day] [kW] [V]
AT30 25 1 2400 2700 490 3,8 1,5 0,23 230
AT40 35 1 2850 2700 630 5,3 2,1 0,23 230
AT50 50 1 2950 3000 760 7,5 3,0 0,55 400
AT75 75 1 3300 3000 1120 11,3 4,5 0,75 400
AT100 100 1 3500 3000 1280 15,0 6,0 0,75 400
AT120 120 1 4000 3000 1450 18,0 7,2 0,75 400
AT150 150 1 4500 3000 1720 22,5 9,0 1,50 400
AT200 200 1 5000 3000 2000 30,0 12,0 1,50 400
AT250 250 1 5300 3000 2150 37,5 15,0 1,50 400
AT300 300 1 5500 3000 2300 45,0 18,0 1,50 400
 
Accessories:
  • Tank for blower for wastewater treatment plant
  • Pumping station with mechanical pretreatment for wastewater treatment plant
  • Sludge tank for wastewater treatment plant
  • Control unit or electrical control panel for wastewater treatment plant
Features and advantages:
 
Compact wastewater treatment plants
  • Very small footprint due to patented Vertical Flow Labyrinth VFL®.
  • Minimized construction work.
  • Quick and easy installation of wastewater treatment plant.
  • One-tank system.
  • Modular and expandable up to 900PE wastewater treatment plant.
Low operation cost wastewater treatment plants
  • Low power consumption due to patented Vertical Flow Labyrinth VFL®.
  • Easy to operate.
  • Simple control systems for wastewater treatment plant.
  • Minimal amount of moving parts inside of wastewater treatment plant.
  • Maintenance interval 1-4x/year.
  • No primary sludge production in the wastewater treatment plant.
  • Low excess sludge production due to patented Vertical Flow Labyrinth VFL®.
  • No mechanical mixing in the anaerobic-anoxic zone due to patented Vertical Flow Labyrinth VFL®.
Easy to transport wastewater treatment plants
  • Low weight, made from plastic (polypropylene) up to 135 cubic meters per day (900PE).
  • Installation without heavy equipment up to 7.5 cubic meters per day (50PE).
Reliable operation of wastewater treatment plants
  • Handles highly fluctuating flows due to patented integrated retention chamber and flow control device.
  • Maintains stable operating stability in a wide range of loading conditions from 25% up to 125% of nominal load due to patented Vertical Flow Labyrinth VFL®.
High effluent quality
  • Biological N removal with high efficiency (denitrification over 90% and nitrification over 80%) due to patented Vertical Flow Labyrinth VFL®.
  • Biological P removal with high efficiency over 80% due to patented Vertical Flow Labyrinth VFL®.
  • Reuse of treated water possible.
  • P-removal by dosing can be integrated into the tank.
  • Discharge into sensitive water, groundwater, bathing water.
Remote monitoring and control
  • Low-cost remote monitoring of failures of wastewater treatment plants.
  • Log function.
  • Adaptation of the operation mode of the treatment plant to individual conditions.
  • Comfortable selection among operation modes makes possible to adjust the capacity of the plant to the current load.
  • Changing the operation modes remotely.
Odor free operation of wastewater treatment plants
  • No primary sludge production, only aerobically stabilized sludge which not smells.
Low noise level of wastewater treatment plants
  • Using of silent diaphragm air pumps up to 5.3 cubic meters per day (35PE) and silent roots blowers from 7.5 up to 180 cubic meters per day (from 50PE up to 900PE).

Circular wastewater treatment plants VFL

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