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Oval wastewater treatment plants - AT30 to AT250 oval

AT 30 to AT 250 oval wastewater treatment plantsAT 30 to AT 250 oval wastewater treatment plants were invented to purify sewage water for blocks of houses, small villages, parts of a village, accommodation properties, restaurants, recreational properties, manufacturing factories, industrial parks. After preliminary purification of industrial wastewater with organic pollution the plants serve as biological treatment for meat processing factories, dairy factories and slaughterhouses, wineries, etc. Furthermore the purified water can either discharge into the surface or underground water, respectively it can be reused for irrigation.

Aquatec VFL oval wastewater treatment plant includes:

  • Biological reactor of wastewater treatment unit.
  • Air pump tank intergrated in the cover of the WWTP.
  • Control unit AQC Basic with GSM remote control.
  • Air pump or Air pumps regarding the type of the WWTP.
  • 230V service plug.
Basic description of VFL® wastewater treatment plants
The compact, “one-tank system” wastewater treatment plants from AT30 oval to AT250 oval are comprised of a single vertical tank with oval ground plan, made from polypropylene - the biological reactor. The dimensions of the plants are ideally suited for transporting in a standard shipping sea container or by a regular truck.
 
The range of small wastewater treatment plants from AT30 oval to AT250 oval is designed for decentralized and semi-centralized solutions of wastewater treatment in the range of 4,5 up to 37,5 cubic meters per day (30PE-250PE).

The wastewater treatment systems comprised of the biological reactors from AT30 oval to AT250 oval can be gradually expanded by installing several units in parallel.

Design of solution for WWTP project Design of solution
for WWTP project		 Support duringing WWTP project Support duringing 
WWTP project		 Fast and simple realization of the WWTP project Fast and simple realization
of the WWTP project
Standard freight vehicles and containers transport Standard freight vehicles 
and containers transport		 Intergrated tank for the blower Intergrated tank for the 
blower 		 230 V electrical connection for WWTP 230 V electrical connection
for WWTP
Reinforced tank backfill with sorted materials Reinforced tank
backfill with sorted materials		 Stainless steel locking system for WWTP Stainless steel locking
system for WWTP		 Remote control of wastewater treatment plant
Remote control of
wastewater treatment plant 

Vertical Flow Labyrinth – VFL®

The AT 30 oval to AT 250 oval sewage treatment plants are ideally suited for transport by conventional truck or container transport.

Wastewater treatment plants of the AT 30 oval to AT 250 oval series are supplied as a standard or as a complete technological line consisting of one all-plastic biological reactor with the possibility of expansion with a pumping station with mechanical pre-treatment and a sludge tank, respectively.

The AT 30 oval to AT 250 oval sewage treatment plants are ideally suited for transport by conventional truck or container transport.

The technology Vertical Flow Labyrinth – VFL®, used in the biological reactor, is protected internationally by patent. The treatment technology ensures the high quality of purified water, low investment and operation costs.

The guaranteed and commonly achieved parameters from the outpour of the wastewater treatment plants are shown in the table below. The quality of purified water corresponds with the Directive No. 359/2022 requirements in the Collections of Laws according to the Government of the Slovak republic for discharging the water into the ground or on the surface (51-2000 PE).

The AT 30 oval to AT 250 oval sewage treatment plants are ideally suited for transport by conventional truck or container transport.

Values after biological treatment:

Parameter Commonly  achieved  values
CODCr 35 mg/l
BOD5 10 mg/l
SS 10 mg/l
N-NH4 2 mg/l
Ntot 15 mg/l
Ptot 3 mg/l

Values after tertiary treatment:

Parameter Commonly  achieved  values
CODCr 35 mg/l
BOD5 10 mg/l
SS 10 mg/l
N-NH4 2 mg/l
Ntot 15 mg/l
Ptot 1 mg/l

Technical parameters of AT30 - 250 oval wastewater treatment plants:

TYPE Daily inflow
 [m3/day]		 Designed load
[kg BOD5/day]

Usable volume
[m3]

 Length x width x height
of reactor
[mm]		 Inflow/Outflow
height
[mm]

Weight
of reactor
[kg]

 No. of
reactors		 Power
input
[kW]
AT 30 oval 4,5 1,8 11,6 3720 x 2260 x 2250 1700/1500 750 1 0,36
AT 40 oval 6,0 2,4 15,0 4660 x 2260 x 2250 1700/1500 850 1 0,45
AT 50 oval 7,5 3,0 19,5 4850 x 2260 x 2500 2200/1900 940 1 0,45
AT 75 oval 11,3 4,5 19,8 5160 x 2260 x 2500 2200/1900 1040 1 0,72
AT 100 oval 15,0 6,0 25,5 6410 x 2260 x 2500 2200/1900 1400 1 0,72
AT 120 oval 18,0 7,2 28,5 7110 x 2260 x 2500 2200/1900 1460 1 0,90
AT 150 oval 22,5 9,0 35,0 8560 x 2260 x 2500 2200/1900 1750 1 1,08
AT 175 oval 26,3 10,5 40,5 9760 x 2260 x 2500 2200/1900 2000 1 1,08
AT 200 oval 30,0 12,0 45,3 10960 x 2260 x 2500 2200/1900 2230 1 1,35
AT 225 oval 33,8 13,5 49,8 12000 x 2260 x 2500 2200/1900 2360 1 1,35
AT 250 oval 37,5 15,00 60,0 13460 x 2260 x 2500 2200/1900 2800 1 1,35

AT 30 to AT 250 oval wastewater treatment plantsAT30 to AT250 oval wastewater treatment plants installation

Are installed into the prepared hole as underground tanks on a concrete slab with a thickness of about 300 mm so that the top edge of the revision manholes overlaps about 50 mm above the terrain. Wastewater treatment plant is reinforced, without the need of putting concrete around.
 
The backfill of the tanks is done with a sorted material of 4/8 mm fraction.
 
The backfill should be done by layers, while creating a back pressure by filling the water into the tank. 
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