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Wastewater treatment plants AS-VARIOcomp N (30-50 EO)

This range of wastewater treatment plants is designed for the efficient treatment of sewage from hotels, guest houses, apartment buildings, smaller villages and townships. The AS-VARIOcomp N sewage treatment plants are suitable for use in buildings with a capacity of 30 to 50 equivalent inhabitants (EO), whether they are municipalities, accommodation facilities, apartment complexes or corporate premises…

This range of wastewater treatment plants is designed for the efficient treatment of sewage from hotels, guest houses, apartment buildings, smaller villages and townships. The AS-VARIOcomp N sewage treatment plants are suitable for use in buildings with a capacity of 30 to 50 equivalent inhabitants (EO), whether they are municipalities, accommodation facilities, apartment complexes or corporate premises.


AS-VARIOcomp N wastewater treatment plants


AS-VARIOcomp N wastewater treatment plants represent a modern, reliable and economical solution for biological wastewater treatment. They are designed for use in residential units, smaller municipalities, townships, guest houses, hotels or establishments with a capacity of 30 to 50 equivalent inhabitants (EO).

Description of how the WWTPs work:

Key features and technology


AS-VARIOcomp N is based on a proven technology solution that ensures stable operation with minimal power consumption. The technology uses aerobic biological processes with a fine-bubble aeration system to ensure balance and low operational load. This principle of low-load activation is proven by many years of experience.

Advantages of AS-VARIOcomp N

  • Low operating costs and energy consumption
  • Insulated, hinged and lockable cover on stainless steel hinges
  • Easy maintenance and simple operation
  • High operational reliability
  • Integrated wastewater storage using mammoth pumps
  • Easy to set up operation
  • Nationwide customer support and service
  • Complete delivery without hidden costs

AS-VARIOcomp N


Application areas


AS-VARIOcomp N builds on the successful AS-VARIOcomp V series and reflects the requirements of the European standard EN 12255 (parts 1-16). They are primarily intended for:

  • Residential complexes and parts of municipalities,
  • hotels and guest houses,
  • establishments, businesses and other buildings.

Thanks to its flexible design, it easily adapts to local conditions. Greater capacity can be achieved by combining multiple units or designing an atypical solution.


Description of the technology

  1. Inflow and pre-treatment
    The wastewater first flows into the settling section where mechanical impurities are separated and anaerobic digestion takes place.

  2. Activation process
    The mechanically pre-treated water proceeds to the activation area, equipped with a fine bubble aeration system, where biological treatment takes place.

  3. Dosing area
    The activated mixture passes into the dosing tank where the sludge is separated from the treated water. The sludge is returned and the excess sludge is stored.
  4. Extraction and accumulation
    The treated water is extracted by mammoth pumps. This creates an accumulation area for the even treatment of the newly flowing water.

  5. Air system
    Two blowers supply air - one to the activation section, the other to drive the pumps. The control is automatic via an electrical switchboard.



Building modifications

  • Placement on reinforced concrete base plate
  • For 30-50 EO inlet opening in the entire tank area
  • Total concreting, including roofing
  • Flexible joints on inflow and outflow pipes
  • Blower in separate plastic, ventilated shaft
  • Electrical switchboard included (standard for wall mounting or in lockable plastic stand)


Variants of AS-VARIOcomp N treatment plants

AS-VARIOcomp N
Basic model with gravity feed, no pumping shaft required.

AS-VARIOcomp N/P
Extended version with precipitant dosing device that reduces the phosphorus content of the treated water. It allows to guarantee the concentration of P total. ≤ 2 mg/l.

AS-VARIOcomp N/PUMP
Variant designed for sites with unfavourable altitude conditions. Includes integrated pumping station with sludge pump and comb wall for pre-treatment.

AS-VARIOcomp N/CONCRETE
Technology built into precast concrete tanks (60-150 EO). Advantages: quick installation, no wet processes required.

Selected references
AS-VARIOcomp 30 N/PUMP, city: Vír, CZ
AS-VARIOcomp 50 N/PUMP, city: Ostrava-Antošovice, CZ
AS-KLARO 50 EO, city: Ochoz u Brna (area of fy. PROEX 2000), CZ, year 2014
AS-VARIOcomp 40 N, town. .
Reconstruction of WWTP Milovy, town: Milovy (WWTP for Hotel 9 skal), CZ, year 2014
new DN equipment, mechanical pre-treatment, measuring object at the WWTP outlet, etc..

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