Obtaining of Biofertilisers Using Pelt Skin Wastes

摘要

Leather manufacturing companies or tanneries are highly polluting generating enormous amounts of solid and liquid waste. Given that, at this time, 99% of learner waste is stored at the landfill, and the amount of hides processed in a tannery is about 10 t/day, we can estimate the importance of this research, in economic and environmental terms. As known from the technological practice of tanning, out of 1000 kg of raw hide (raw material), 750 kg are waste and me highest amount is about 600 kg pelt waste. Pelt skin wastes can be capitalization in agriculture, as it die important sources of C, N, P and micronutrients. In tiiis study was presented a Bow diagram to capitalization ofPeltskin waste like biofertiliser using as main step to degradation, enzymatic biodegradation. Was made an investigation concerning the influence of pH, temperature, and enzymes mixture ratio from commercial Geolife-Switzerland, on biodegradation degree for Pelt skin waste for obtaining on protein hydrolysates and used in mixture with another compounds (macro and micro nutrients) like biofertilisers. Three types of enzymatic preparations torn commercial Geolife have been used in various mixing ratios: El-mainly containing hydrolases, E2-mainly containing deaminases and decarboxylases, E3-mainly containing oxide-reductases. The optimum temperature of biodegradation is in range of 40-45°C, the maximum biodegradation degrees (over 99.6%) were obtained for E1:E2:E3 mixing ratios of 2:1:2 at pH = 4, and 2:1:1 at pH = 7, and 2:1:5 at pH = 12, which allows the interpretation of biodegradation mechanisms.