ECOLOGICAL RISK ASSESSMENT OF LEAD AND CADMIUM CONTENT IN EGGS FOUND IN ECOTECHNOLOGICAL SYSTEMS

Abstract

Lead and cadmium studies have been conducted in the egg eco-system trophic chain, which is a continuation study on the chemical heterogeneity of the biosphere, assessed at the ecosystem level. For the realization of the ecologilization, a two-module model of an eco-technical system for production of eggs with models of the two main types of trophic chains is proposed: pasture and detritus type.The main product of the linearity of the technological processes in livestock breeding is fertilizer. From the point of view of efficient management of eco-technical systems to minimize environmental risk, the ecological assessment of the fertilizer for the purpose of its utilization is appropriate. It belongs to the Odum Classification Conglomerates I (1975), which includes organic substances that are potentials of nutrients and energy, and should be utilized as resources for recipients in agro-ecological or aquatic ecosystems. The fertilizer is materially different from other products under this group due to the large number of pathogenic microorganisms. Organic substances in the fertilizer are a risk factor due to the emission of greenhouse gases and toxic substances to the atmosphere and pathogenic microorganisms are biological pollutants with high risk potential due to the risk of it causing human and animal diseases.Our research has focused on the quality of products used for human food and the particularities of the movement of matter in eco-technical systems (Baykov, 1994, Baykov &amp; Tyrawska, 1991, Baykov et al., 1996, Baykov et al. 2003). The experiments were carried out in models of eco-technical systems for eggs on the scale of "mesocosmos" via classification of Odum (1986) by analyzing the physicochemical indicators of the two elements of the incoming stream: feedstock and drinking water and an assessment of the chemical heterogeneity at the ecosystem level was performed by analyzing and hygienically assessing the physical characteristics of products used for human food.Proposed, are criteria for assessing the ecological risk of chemical heterogeneity at ecosystem level: eco-technical Clark (Ec), Clark of safety (Cs), Clark of concentrating (Cc) and Clark of technology (Ct). The results show the possibility of assessing environmental risk through the Cs criterion applied to mass of the egg/ feedstock /and for the processed manure. The ecological risk is managed through the Cs and Ct criteria by regulating the amount of toxic factors in the input stream to guarantee safe for human health secondary biological production.</jats:p