engleski

Stabilisation of the soil fraction of pig slurry amended with natural zeolite

Investigations were carried out to observe the influence of 1 and 2% addition of natural zeolite ( clinoptilolite ) to the solid fraction of pig slurry on decomposition processes during storage for 3 months at temperatures 18- 25 °C with mixing after 3 and 6 weeks. The presence of zeolite influenced the dynamics of temperatures in the core of substrates as well as the chemical parameters (pH, dry matter, residue on ignition/ash, total nitrogen and total phosphorus). The highest temperature was recorded in the control in the 4th week of the experiment (37.1 °C). Values of pH in water extracts corresponded to the course of temperatures in the core of the substrates. In the first stage of the experiment, statistically significant difference was recorded in the content of dry matter and total nitrogen between substrates with zeolite and the controls. The influence of zeolite was also observed in the values of total phosphorus, particularly in the substrate 3 in which the Pt values doubled in comparison with the control after 6 and 12 weeks of storage. The values of individual parameters and the course of temperatures in the core of substrates indicated different influence of 1% and 2% addition of zeolite on decomposition processes during the storage.

zeolite (clinoptilolite); solid fraction; pig slurry; aerobic microbial decomposition

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