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Anaerobic biodegradability test

Anaerobic biodegradability test

Identifying potential for anaerobic preliminary stage

With the anaerobic biodegradability test, the anaerobic biodegradability of process water/effluent is checked and the potential for use of an anaerobic process stage is determined.

The evaluated data of the quick laboratory test provide information on the biodegradation behavior and kinetics, as well as the potential toxicity or inhibiting characteristic of the samples investigated with regard to the anaerobic biological activity. The water/effluent samples are taken from the process at previously defined spots.

The results provide a basis for determining whether use of an anaerobic stage for internal process water/effluent treatment is appropriate. If the test result is positive, the next step is to carry out a pilot trial using the Anaerobic Pilot Plant, the R2S or the E2E Anaerobic Demonstration Plant on site. The trial is run under realistic conditions to ensure that the decision to invest in an industrial-scale facility is justified.

There are considerable benefits associated with the use of an anaerobic process stage (installed upstream of the aerobic treatment process). The organic matter in the process water is converted to biogas with minimal energy use. Because the organic content has been reduced through an anaerobic process, the necessary output for aeration in the downstream aeration stage is reduced and energy can be saved. In addition, the volume of bio-sludge to be disposed of is reduced, as the organic matter is converted predominantly to biogas.