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SAFETY OF BUILDING SYSTEMS. ECOLOGICAL PROBLEMS OF CONSTRUCTION PROJECTS. GEOECOLOGY

NEW OPPORTUNITIES FOR CLARIFICATION OF INTENSELY COLORED FILTRATES OF SOLID WASTE LANDFILLS CONCURRENTLY WITH THEIR DECONTAMINATION USING LIMEMILK AND CALCIUM SALTS

Vestnik MGSU 8/2013
  • Potapov Aleksandr Dmitrievich - Moscow State University of Civil Engineering (MGSU) Doctor of Technical Sciences, Professor, Head, Department of Engineering Geology and Geoecology, Moscow State University of Civil Engineering (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Konygin Aleksandr Aleksandrovich - ECOTECH-MOSCOW Limited Liability Company principal specialist, ECOTECH-MOSCOW Limited Liability Company, 6/8 B. Pionerskaya st., Moscow, 115054, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 116-122

The authors studied the effect of the process parameters (pH, concentration of Ca2+) on precipitation of humic acids contained in the filtrate of solid waste in the process of its decontamination using lime. The content of contaminants in the filtrate was monitored through the employment of well-known methodologies using methods of optical molecular and atomic spectroscopy; pH values were monitored through the employment of the potentiometric method. In some cases, chemical oxygen demand was measured to identify changes of the content of organic substances in the solution. Concentration of humic substances was identified by measuring the absorption spectra in the UV and in the visible range and by applying the calibration curve. Samples of humic and fulvic acids produced by Ecoanalitika Open Joint Stock Company were used for benchmarking purposes.The optimal amount of lime milk for the purpose of precipitation of humic substances in the filtrate is equal to 24 g/l. It is proven that any further increase of the lime milk flow is limited by the increase of the residual calcium concentration in the purified solution. Consumption of lime milk in the course of clarification of filtrates may be reduced by sharing it with calcium salts. By adding 10% of calcium chloride to the lime milk content, lime milk consumption may be reduced by 50%.

DOI: 10.22227/1997-0935.2013.8.116-122

References
  1. Konygin A.A., Skvortsov L.S., Seliverstov A.F. Ochistka fil'trata poligonov zakhoroneniya tverdykh bytovykh otkhodov [Treatment of Filtrate of Waste Landfills]. Vodosnabzhenie i kanalizatsiya [Water Supply and Wastewater Disposal]. 2010, no. 1–2, pp. 124—127.
  2. Goncharuk V.V., Shkavro Z.N., Kucheruk D.D. Kompleksnaya ochistka stochnykh vod svalok tverdykh bytovykh otkhodov [Integrated wastewater treatment of municipal solid waste landfills]. Khimiya i tekhnologiya vody [Chemistry and Technology of Water]. 2007, vol. 29, no. 1, p. 55—66.
  3. Wilson A.L. J. Analytical Aspects of Chemically Modified Electrodes: Classification, Critical Evaluation and Recommendations. Appl. Chem. 1960, vol. 10, 377 p.
  4. Potapov P.A., Pupyrev E.I., Potapov A.D. Metody lokalizatsii i obrabotka fil'trata poligonov zakhoroneniya tverdykh bytovykh otkhodov [Methods of Containment and Processing of the Filtrate of Solid Waste Landfills]. Moscow, ASV Publ., 2004, 168 p.
  5. Stir E., Fisher M. Posobie spetsialista po ochistke stokov [Manual for Wastemater Treatment Specialists]. Warsaw, Zaydel'-Pzhivetski publ., 2002, 406 p.

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