With the global expansion of wastewater treatment, soil remediation, and waste treatment, the study and monitoring of biological cleaning treatments becomes increasingly important.

Biological tests are an important component, in addition to the usual physical-chemical measuring methods. In order todetermine the microbial activity in and biodegradability of foodstuffs, pollutants, harmful substances or waste substances,respiration (depletion) measurements are often performed.

In these measurements the respiration of the organisms is determined under defined conditions as the oxygen uptake or release of carbon dioxide.

Measurements are carried out via closed systems using the OxiTop®-C in combination with the OC 110 controller. Depending on the application, specially adapted measuring vessels are available, all of which are equipped with the necessary connection thread and some are autoclavable. Specialty packages are available with everything needed for a particular application.

For the incubation of larger measuring vessels, WTW offers the TS 1006-i thermostat cabinet as well as the IS 6-Var stirrer platform, to accomodate large diameter vessels.

Soil analysis / biodegradability of pollutants: laboratory method according to DIN 19 737

Aerobic using CO₂ absorption, quantitative CO₂ determination possible

Determination according to OECD
301 F / DIN EN 29 408 / ISO 9408

Aerobic using CO₂ absorption

Determination of anaerobic degradation processes

Anaerobic, determination of CO₂ + Methane

Growth and stress investigations:
determination of the respiration rate