REGRESSIVE DEPENDENCE OF THE BIOLOGICAL PROCESSES ACTIVITY IN SOLID HOUSEHOLD WASTE ON THE DEGREE OF ITS COMPACTION IN THE COURSE OF TIME

Abstract

In recent years the total area of solid waste landfills and landfill sites, including overloaded sites has increased, this violates the ecological norms, besides the overloaded landfills are   the objects of intensive ecological loading, threatening the pollution of the environment with harmful substances: heavy metals, microorganisms (colibacilli, streptococci, staphylococci and ascarids, high toxic filtrates, landfill gas, etc). The paper contains the results of determination of the regressive dependence of the biologic processes activity in the solid household waste on the degree of the compaction with the course of time by means of planning of multifactorial experiment applying Box-Wilson method. Аdequate regressive dependence of the biologic processes activity in solid household waste on the degree of the compaction in the course of time in the form of the quadratic regression with the effects of interaction of the first order is obtained. The adequacy of the regression model was verified by means of Fischer test and the significance of the regression coefficients – by Student`s test. The suggested mathematical model proves the need of the waste compaction before burying to minimize the negative impact on the environment and can be used for the design of the mechanisms of waste compaction in the dust-carts. By Student’s test it was determined that among the studied factors of the impact the activity of biological processes in solid household waste depends greatly on the density and to a lesser extent – on time. The response surface of the efficiency function – dehydrogenase activity of the solid household waste and its 2D cross-section in the plane of the impact parameters is constructed, which allows to represent the obtained dependence and the character of the simultaneous impact of several factors on the efficiency function.