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2 Polish Journal of Chemical Technology

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Production of organic fertilizer from poultry feather wastes excluding the composting process

Tronina P., Bubel F.

Polish Journal of Chemical Technology

2008

Vol. 10, nr 2

33-36

Chicken feathers generated in large quantities by the poultry industry are hazardous for the natural environment because of their poor digestibility and their potential as a source of microbiological pathogens. Currently, the main method of feather waste management is the production of feather meal by steam pressure cooking. This technology requires a high energy input. The high costs of hydrothermal degradation of these wastes are conducive to finding other alternative possibilities of poultry wastes management. This paper describes the feather-utilization method with calcium oxide treatment in a rotational reactor, which leads to the production of organic-mineral fertilizers. The effectiveness of this method has been tested in chemical and microbiological analyses. The results of the study confirm the possibility of the environmental usage of utilization-products.

Utilization of post-slaughter wastes related to european union regulations

Anissimo I., Grzelak A., Hoffmann J.

Polish Journal of Chemical Technology

2004

Vol. 6, nr 3

1-4

Post-slaughter wastes and dead animals cause big risk for the natural environment - the decomposing carcasses and wastes may become a source of microbiological pollution and cause many diseases, also infections. The main direction for the management of the low-risk materials is the production of meat and bone meal. Legal prohibition of using meat and bone meal during livestock feeding resulted in a problem of the management of such animal by-products. This paper describes legal regulations concerning the objectives on the processing and the use or the disposal of the animal by-products, also presents the results of preliminary research on the composting of meat and bone meal.