wastewater treatment » clarification processes and wastewater treatment plants

approved technology with optimal cleaning achievements


Wasserunion plants are equipped with different cleaning systems. Each of these processes has particularly advantages and ensures the highest degree of purification for every single project. This allows for delivery of the perfectly matching system for every purpose. Since almost every customer has individual requirements and demand, we are able to deliver individual systems considering local regulations, purposes and wastewater as well as clean water parameters.

aerated activated sludge/fixed-film reactors


These processes are automatic steered purification plants.
The biological stage consists of an aeration basin and membrane blowers for optimized fine-bubble oxygen transfer. Additionally, the fixed bed reactors consists fixed bed units in the aeration tank, where the biology settles on. Both procedures are charaterised by their high resistance against load fluctuations and can handle high concentrated wastewater. These plants are often used for decentralized wastewater cleaning up to 800 pe as well as purification of industrial wastewater from production and food industry.

fixed film wastewater treatment plant

rotating biological disc procedure


These plants are operating fully automated.
The biological stage consists of disk dipping bodies, which are assembled on a rotating high grade steel wave, rotating slowly with least demand for electrical power. This procedure is charaterised by its particularly small energy consumption.
Preliminary and secundary treatment, biology stage and sludge bin are located in one tank. The wastewater is flowing thru all stages continously in free fall without the need for pumping or aeration by blowers. These systems are often used for small scale plants from 4 to 300 pe.

WU-ST Box wwtp

SBR systems


The sequencing batch reactor is based on an time-oriented, cyclic process.
It consists of 5 different phases:
· filling
· reaction
· settlement
· empty
· wait
The SBR plants are mostly used in smaller plants for single houses or group-connected houses.