IMPACT OF THE PROXIMITY TO THE LANDFILL OF MUNICIPAL SOLID WASTE ON THE LEVEL OF MICROBIOLOGICAL CONTAMINATION OF THE UNDERGROUND WATERS BY THE TOTAL MICROBIOLOGICAL COUNT (TMC)

Abstract

In recent years the total area of municipal solid waste landfills and dumps, including the overloaded, which violate the norms of ecological safety and are the objects of the intensive ecological loading has grown. These landfills may cause the pollution of the environment with microorganisms (colibacilli bacteria, streptococci, staphylococci and ascarids) including bacteriological contamination of the soil and underground waters. Determination of the regression dependence of the level of microbiological contamination of the underground waters according to total microbiological count on the distance to the landfill of municipal solid waste is an important scientific-technical problem. Objective of the research is the determination of the regression dependence of the level of the microbiological contamination of the underground waters according to total microbial count on the distance to the landfill of municipal solid waste. In the process of the investigation the method of the regression analysis of the results of single-factor experiments and other paired dependences with the selection of the rational type of function from the sixteen most widely used options by the criterion of maximum value of the correlation factor was used. Regression was performed on the base of the linearizing transformations, which enable to reduce non-linear dependence to linear one. Determination of the coefficients of the regression equations was carried out, using the methods of the least squares by means of the developed computer program "RegAnaliz", protected by the Certificate of the state registration of the rights to the copyright object. Adequate regression dependence of the level of microbiological contamination of the underground waters, according to the total microbial count of the ground waters on the distance to the landfill of municipal solid waste was obtained, the given regression is used for the determination of the safe distance of MSW landfill location from the sources of the portable water according to the level of microbiological contamination of the ground waters by the total microbic count. Graphic interpretation of the dependence of the microbiological contamination level of the underground waters according to the total microbial count on the distance to the landfill of municipal solid waste has been constructed, it enables to illustrate the dependence and show the coincidence of the theoretical results with actual results on the level of 0.99259. It was established that the safe distance for the location of municipal solid waste landfills from the sources of the portable water according to the level of microbiological contamination of the underground waters by total microbial count is 1387 m.