CUSS Applications - Chriwa Group - Water matters. We care.

Mechanical pretreatment

Mechanical pre-treatment takes place as standard at the beginning of every wastewater treatment process.

Dosing

Many different technologies are used in wastewater technology. To achieve optimal results, it may be necessary to condition the wastewater in different ways.

Equalisation basin

Industrial wastewater in particular is subject to strong fluctuations in its characteristics during the course of the day.

Emergency tank

At production sites where particularly strong temporary fluctuations in the load of the waste water are possible, the equalisation tank can be extended by an emergency tank.

Anaerobic biological processes

Different reactors are possible for the anaerobic processes. The suitability depends on the industry or the water properties and related factors.

Aerobic biological processes

Aerobic treatment of wastewater in the activated sludge tank is the most widely used treatment process in wastewater treatment and has proven itself over decades. In addition, there is SBR, biological phosphorus elimination or (de)nitrification.

Membrane technology

Space problems, increased effluent limits, corporate sustainability goals or the desire to reuse wastewater for irrigation systems and the associated conservation of natural resources are reasons for using membrane bioreactors in wastewater treatment plants.

Aeration systems

Diaphragm pressure diffuser, submersible motor diffuser, surface diffuser

Disinfection

During the disinfection of the treated wastewater, remaining bacteria and germs are killed. This fulfils particularly high requirements for the biological quality of the wastewater.

Sludge dewatering

In biological treatment steps, the organic load in the wastewater is used by activated sludge as a food source. This purifies the wastewater and produces sludge. To keep the amount of sludge in the bioreactors constant, sludge must be removed regularly.

Water reuse

In view of advancing climate change and increasing water scarcity, the reuse of wastewater is becoming more and more attractive. Depending on the use of the treated wastewater, additional steps are necessary.

Energy recovery

Biogas can be produced from wastewater with high concentrations of biodegradable carbon (BOD). Fermentation processes are stimulated by creating anaerobic conditions in a reactor designed for this purpose (CSTR, UASB or EGSB). Before the biogas produced can be used for energy generation, the following processing steps are necessary.

Solid-liquid separation

In order to maintain the specified clear water values, the removal of solids in the water often plays an essential role. These suspended substances can be, for example, fats from the food industry or activated sludge residues from biological purification.