Study the Composition and Environmental Impact of Sewage Sludge

Abstract

The article examinee the characteristics of sewage sludge and its impact on the environment. The description of technical installations, sludge sites in the municipal wastewater treatment systems, which are sources of unfavorable sanitary and epidemiological condition of the studied territory, was presented. A detailed analysis of the structure, composition and morphology of sludge sediment was given. It was found that the sludge presents a loose, rough heterogeneous porous structure represented by the presence of a fibrous substrate with amorphous scalycrystalline inclusions. During laboratory analyses of the composition of the dry residue, the presence of such types of heavy metals as chromium, manganese, nickel, copper, zinc, lead, cobalt, molybdenum, cadmium was revealed. The excess of permissible concentrations of various elements was observed: chromium more than 7.1 at MPC -6.0 by 1.18 times; copper more than 3.3 at MPC -3.0 by 1.1 times; zinc more than 27.3 at MPC -23.0 by 1.18 times; lead more than 34.3 at MPC -32.0 by 1.07 times; cobalt more than 6.4 at MPC -5.0 by 1.28 times; molybdenum more than 6.9 at MPC -5.0 by 1.3 times. Soil analysis revealed a pH of 7.1, which is neutral, may be optimal for plants; the concentration of calcium, iron and chromium does not exceed the established maximum permissible values. When analyzing the air environment of the territory of the treatment facilities, the presence of gaseous pollutants, such as methane, ammonia, nitrogen dioxide, hydrogen sulfide, carbon monoxide, was established. It has been established that anthropogenic sludge landfills are the sources that create a technogenic load on the atmospheric air, polluting it with methane, since the concentration of methane exceeds the MPC by more than 3 times.

Adsorption of phosphate over a novel magnesium-loaded sludge-based biochar

“…These findings align with the precipitation mechanism. In the specified pH range, the phosphate present in the solution was shown to exist as HPO 4 and H 2 PO 4 ions.…”

“…Excessive discharge of phosphorus containing wastewater can lead to eutrophication of surface water, and sludge is composed of organic matter, trace elements, microorganisms [ 3 ]. and other toxic substances such as pathogens and heavy metals [ 4 , 5 ]. Therefore, strengthening sludge treatment is of great significance in addressing environmental pollution risks and phosphorus crises.…”

Theoretical Researching of Particle Movement in Cleaning Zone of Dust-Arrester

“…depends on the efficiency of its cleaning. At the initial stages, a lot of dust is released, and in the later stages, the dust concentration decreases and can reach up to 10 g per 1 m 3 of air [23][24][25][26][27][28][29].…”

Improvement of Methods of Analysis and Forecasting of Industrial Injuries in the Electric Workshop of the Mining and Processing Plant

“…Various statistical data on accidents in the electric power industry as a whole are contained in the works of [13][14][15][16][17][18][19][20] and other authors.…”