Securing of Environmental Safety Requirements when Using Sludge of Biological Treatment Plants for Reclamation of Lands Polluted with Aniline

Abstract

There were analyzed conventional methods of polluted lands decontamination, recognized the main environmental and economic disadvantages of known methods. For cleaning of industrial areas, contaminated with organic products of production, in particular aniline,  was proposed method of biological reclamation when using sludge of biological treatment plants of the same enterprise. There were defined characteristics of environmental safety securing when using sludge of close done an enterprise: sanitation and epidemiological safety and heavy metals content. Analysis of active sludge samples and potting soils from contaminated are showed that heavy metals content not exceed standards, established in Russia and EU. For justification of allowable dose of introduced sludge, taking into account heavy metals content, was performed calculation of theoretical allowable introduced sludge. In accordance with research data, optimal dose of sludge for reclamation not exceeds calculated allowable dose. When using sludge in specified quantity adverse impact on environment is minimized by means of compliance with the requirements on heavy metals content.