Biocoenosis and degradation in model wastewater treatment plants

Summary The bacteria and protozoa of laboratory models for wastewater treatment plants have been determined and compared to species from ordinary plants. A determination key specially designed for the bacteria of wastewater treatment plants has been developed. Large changes in the composition of the bacterial populations were found in the model open laboratory plant system. Tests with a model sterile closed plant and reproducible inoculum have been performed to get a constant bacteria population to improve the comparability and reproducibility for substance degradation test.