BIODEGRADATION OF A NEW POLYMER BINDER BASED ON MODIFIED STARCH IN A WATER ENVIRONMENT

In this study, the results of biodegradability of new polymeric binder consist of modified starch - Polvitex Z (by Xenon) in water solution are presented. Biodegradation tests were conducted in accordance with Zahn-Wellens method, which is intended to denote the susceptibility to biodegradation by microorganisms (in high concentrations during the static test) of the non-volatile, watersoluble organic compounds. Observations of the decomposition process was carried out through regular, daily or at certain time intervals by measurement the Chemical Oxygen Demand (COD) and level of biodegradability (R T )  in the prepared samples during the test. The study showed that the starch binder is fully biodegradable material in an aqueous medium.