BIO-AIR Wasserfloh Systems - State-of-the-art technology for new installation and upgrading

The "Bio-Air-Wasserfloh“ system is an effluent treatment system, suitable for all households, municipalities, industrial and commercial enterprises which are not connected to the public mains.
A tertiary purification stage ensures that the legally stipulated purification standards for small-scale plants are met.

The waste-water purification system “Bio-Air-Wasserfloh” was developed with the objective of offering a modern and, at the same time, cost-efficient system, which can be installed in existing or new treatment plants. The size of the plant for households of between 4 – 8 persons must not exceed 4.2 m3.

The advantages of the BIO-AIR-Wasserfloh system technology:

  • Latest state-of-the-art technology, high quality
  • Lower energy consumption
  • No pumps or electrical components in the effluent
  • Septic tank need only be evacuated every 3-5 years on average
  • Excellent discharge values
  • Low maintenance requirements and costs
  • New installation and retrofitting possible
  • Tried and tested 1000 times over

Purification Process

1. Preliminary Treatment

Preliminary Treatment The primary treatment state accounts for 50% of the treatment plant. The effluent is channelled into the primary treatment unit via an inlet with a 10 cm gradient. Due to the integrated H-pipe the floating sludge and the sedimented substances are retained in the tank and stored. These are disposed of as required.

2. Biological Purification


Located in the activation chamber are baskets filled with polyurethane growth bodies. Located beneath the baskets is the pipe membrane aerators. The growth bodies are aerated by an air/oxygen mixture generated by a membrane pump in the control cabinet and fed in through a membrane aerator. The rising air causes the growth bodies to circulate, thus ensuring optimal contact between the effluent, air (oxygen) and the micro-organisms which colonise the growth body. Due to the motion of, and the friction between, the bodies in the water, additional growth of the growth bodies is prevented and an intact bacterial culture is guaranteed.

3.. Tanks with LEVAPOR


The biological break-down of the contaminants in the effluent is guaranteed by the activated sludge flocculates and the LEVAPOR micro-organisms The purified water effluent is channelled into the post-treatment unit via the H-pipe. Growth bodies can no longer be transported as their movement is intentionally restricted by the synthetic baskets. The air is supplied via a PE pipe, measuring 25 x 2.3 mm.

4. Post-treatment

The post-treatment is conducted using a hopper tip. Located in the centre is a mammut pump (or airlift) which by means of a controlled air supply returns the sedimenting activated sludge into the preliminary treatment unit. The pump times are determined by an SPS controller, and regulated via a membrane pump with a two-way valve. The purified water leaves the plant down a natural gradient through the T-pipe.

5. Control


The PLC control system is located in a control cabinet. The operator can read off all the key data and enter this into the operational log. The air is generated via a membrane pump and fed into the aerator via 2 PE pipes, measuring 25 x 2.3 mm. The air supply to the airlift pump is controlled by a two-way valve.


All the necessary components can be easily installed without the deployment of heavy equipment into the existing on-site three-chamber plant, which complies with the technical standards stipulated by DIN 4261 Part 1. The available apertures are to be sealed and the appropriate H-pipes mounted.

Installation / Operation

The installation of the plant is carried out by our partner engineers after delivery on condition that the plant complies with parameters stipulated under current legal provisions. The plant is installed according to these stipulations. The installation is carried out through the existing manhole cover of the multichamber pit, without the cover plate having to be removed. After the baskets and sludge retention unit have been installed, the control box is mounted. The controls and the baskets/sludge retention unit are then connected to the air pipes. After the plant has been filled with waste water, the operation can commence. All the components are manufactured as a modular system, which means that the installation can be effected without difficulty - even for the layman. In order, however, to attain the highest quality standards, our partners are trained by us prior to installation.

Energy consumption

A plant for 4 persons is usually powered by a 60W membrane pump. At 12 hours of operation the electricity consumption is 0.72 W per day. This works out at an average electricity price of 0.125 euro daily, or 2.7 euro a month.

Evacuation of the septic tank

Compared to similar plants, the production of sludge on the small-scale plants retrofitted with BIO-AIR-WASSERFLOH is very low. Through the effective application of a small “treatment area” we have been able to substantially reduce the production of sludge. Providing the septic pit is only evacuated as required, ie. the evacuation is only carried out when the septic tank is half-full with sludge, then disposal is only necessary every five years on average, which results in enormous cost savings.