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1 Polish Journal of Chemical Technology

1 2005

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Chemical and microbiological assessment of fatty residues for farming purposes

Latała A., Wierzba S., Farbiszewska T., Polaczek B.

Polish Journal of Chemical Technology

2005

Vol. 7, nr 2

28-30

The present study was aimed to make a chemical and microbiological assessment of fatty residues from the municipal and industrial liquid waste purification unit of the Odra Fat-Processing Plant of Brzeg, Poland. The assessment was made towards the land use of the residues. Microbiological tests embraced a quantitative and qualitative analysis of the residues; chemical tests were aimed at marking the contents of fatty substances, macroelements and heavy metals. The fatty residues from the present study were of a potentially high fertilizing quality as they contained considerable amounts of organic carbon, nitrogen, phosphorous and magnesium. The content of heavy metals did not exceed the maximum allowed values for the residues to be used in farming. There were two factors which inhibited the possibility of the ready use of the residues in farming: a high coli count and a 30% content of fatty substances. A significant number of lipolytical bacteria in the count of bacteria isolated from the waste, creates favourable conditions for their biodegradation by the composting method.