forces at low speed shaft LSS Types H to H B to B4-CH9A Bevel-helical speed reducer B4

Flender/Flender Gear Units/Bevel-helical speed reducer B4

tested under scientific monitoring. 2. Working steps The working pro ramme included the necessary preparator work, such as collecting liter- ature, testing ancqdeveloping the required analytical metho&, actinometric measurements, preliminary experiments on oxidation of the substances mentioned above and, finally, deter- mining the reactor geometry, the most favourable parameters for operation and possible syn- ergistic effects, constructing industrial-scale test installations and testing them under practical conditions. 3. Results The trials showed that unsaturated chlorinated organic compounds, such as trichloroethylene and tetrachloroethylene, and chlorinated aromatic compounds, such as chlorophenols, can be successfully decomposed into carbon dioxide, water and hydrochloric acid. Ring fission occurs first in the aromatic compounds. Polyaminoacetic acids, such as nitrilotriacetic acid and ethylenediaminetetraacetic acid and their heavy metal complexes, can also be decomposed. Up to now, there has been no treat- ment process for the non-copper complexes of the complexin agents mentioned. In this case, the trials showed that oxidation takes place via fragments of t8e molecules, which can also be complexing. However, oxidation should only be continued until the metals present can be pre- cipitated using conventional methods (hydroxides, sulfides). All the resultant fragments of these molecules are readily biodegradable. Figure 1 shows that EDTA is decomposed very rapidly, while certain complex bonding capa- city (CBC) remains longer. In this case however, the metals can be precipitated conventionally. The COD is reduced by more than 9%. Cyanides and even hexacyanoferrate can be oxidised using this process. 2 . .. Many COD-forming substances can be oxidised to form carbon dioxideand water Phenol,sur- factants and dyes, among many others, belong to this group of substances The process was tested under practical conditions in industrial-scal