@ARTICLE{Alwaeli_Mohamed_Economic_2008,
 author={Alwaeli, Mohamed},
 number={No 4},
 pages={19-34},
 journal={Gospodarka Surowcami Mineralnymi - Mineral Resources Management},
 howpublished={online},
 year={2008},
 publisher={Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN},
 publisher={Instytut Gospodarki Surowcami Mineralnymi i Energią PAN},
 abstract={The costs connected with utilizing secondary materials (waste) as substitute of the raw materials depend on many factors. In this paper, the emphasis is put on the functioning of the plant depending on: capital costs, ecological unit cost ofwaste recycling [zł/Mg], unit costs of processing I Mg ofwaste into secondary materials, marketing costs of the obtained product, mass fraction of the substitute obtained from the waste mass, social unit costs [zł/Mg] taking into account such aspects as creating new workplaces, etc., amount ofwork allocated for the production in fixed units, fixed costs and the amount of the processed raw material (waste). The factors will be considered in two ways: a)maximization ofthe production with the costs ofproduction fixed, b)minimization ofthe costs of production with the volume of production fixed. Much research has been done throughout the world to determine the economic and ecological profitability of secondary materials (waste) utilization in the substitution of raw materials. Unfortunately, Poland does not have sufficiently good solutions on this field. The deficiency in such solutions impedes the work of groups of specialists in various fields involved with the rational planning ofrecycling. These are the result ofourmathematical model of economic profitability of the secondary materials (waste) utilization as the substitute of primary materials, at the moment no empirical analyses have been carried out on this issue. We think that it might be a good topic for further applied studies.},
 title={Economic profitability of the secondary materials utilization as a substitute of raw materials},
 type={Article},
 URL={http://czasopisma.pan.pl/Content/133506/PDF/4_GSM_24_4_1_2008_Alwaeli_Economic.pdf},
 keywords={waste, cost, condition, recycling, production function},
}