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2 Polish Journal of Chemical Technology

2 2007

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Utilization of poultry droppings in mineral-organic fertilizers

100%

Hoffmann K. , Lewandowska B. , Borowiec M. , Hoffmann J.

Polish Journal of Chemical Technology

2007

tom 9

nr 3

12-14

The results of physicochemical analyses of raw and composted turkey droppings and those of germination tests carried out using the droppings are presented. On the basis of the results formulas for microelement mineral-organic fertilizers have been developed and fertilizer rates have been determined for winter wheat.

Biodegradability of the compounds introduced with microelement fertilizers into the environment

100%

Borowiec M. , Polańska P. , Hoffmann J.

Polish Journal of Chemical Technology

2007

tom 9

nr 3

38-41

The results of laboratory studies into the oxygen biodegradation of chelating substances in aqueous medium under kinetic and static test conditions with added glucose as an additional source of carbon, are presented. It has been found that S,S-ethylenediaminedisuccinic acid (S,S-EDDS) and methylglycinediacetic acid (MGDA) are more readily degradable than ethylenediaminetetraacetic acid (EDTA), most commonly used in the production of microelement fertilizers. It has also been found that the presence of additional carbon sources accelerates biodegradation.