Transbaikal State University, Chita, Russia:

V. M. Gerasimov, Head of Chair, Professor, Doctor of Engineering Sciences, kafsmim@zabgu.ru
K. V. Svalova, Associate Professor, Candidate of Engineering Sciences

Monolit, Chita, Russia:
E. I. Nizhegorodtsev, Director of Testing Laboratory

Opencast mining flow charts, for instance, in gold open pit mines, widely employ circulation water treatment tanks. Contaminated process water is treated in the tanks by gravity and physicochemical methods which fail to ensure sufficient clearing up to sanitary standards. One of additional methods of advanced treatment of contaminated water is mechanical separation of solid and liquid phases on filtering machines. This article presents the research results on mechanical treatment of contaminated mine water on filtering machines using fibrous polymeric materials obtained by needle-punching and thermal bonding. The theoretical and experimental studies determined the dynamic characteristics, including filtering velocity and time, filtrate volume and rate of removal of suspended matter from water. The researchers show that the combination control of solid/liquid separation can ensure high rate of removal of suspended matter from contaminated water, which increases extraction of valuable components, e.g. placer gold in sand washing, and decreases contamination of natural water by water discharge from the tanks. It is found that the most efficient is the cartridge arrangement of filtering materials as it allows rapid replacement of contaminated filter partitions, as well as their regeneration and recovery. The use of the cartridge filters with filtering fibrous materials in different combinations improves economic efficiency and ecological safety of mining.

1. Zhurkin N. N., Alibekov S. Ya. Improvement of mechanical purification of sewage water. Vestnik Povolzhskogo gosudarstvennogo tekhnologicheskogo universiteta. Ser.: Les. Ekologiya. Prirodopolzovanie. 2013. No. 1. pp. 92–97.
2. Zenkov I. V. Review of foreign researches in the field of mining ecology. Gornyi Zhurnal. 2016. No. 10. pp. 96–99. DOI: 10.17580/gzh.2016.10.20
3. Ravi K. J., Zengdi “Cindy” Cui, Domen J. K. Environmental Impact of Mining and Mineral Processing: Management, Monitoring, and Auditing Strategies. Oxford : Butterworth-Heinemann, 2016. 322 p.
4. Northey S. A., Mudd G. M., Saarivuori E., Wessman-Jääskeläinen H., Haque N. Water footprinting and mining: Where are the limitations and opportun ities? Journal of Cleaner Production. 2016. Vol. 135. pp. 1098–1116.
5. Subbotin Yu. V., Oveshnikov Yu. M., Avdeev P. B. Open pit mining processes : teaching aid. Chita : ChitGU, 2009. 333 p.
6. Adelshin A. B., Busarev A. V., Selyugin A. S., Urmitova N. S., Muratova N. A. Proportioning of structures for process wastewater treatment. Part 1. Mechanical and chemical treatment of process wastewater : teaching aid. Kazan : KGASU, 2010. 67 p.
7. Gerasimov V. M. Fibrous polymeric materials in geotechnology. Chita : ChitGU, 2010. 207 p.
8. Svalova K. V., Nizhegorodtsev E. I. Geosynthetic materials in processes of filtering and draining. Chita : ZabGU, 2016. 221 p.
9. Tagibaev D. D., Osmonov Zh. I., Abdurasulov I. Water clarification by filtering. Innovatsionnaya nauka. 2017. No. 1-2. pp. 92–95.
10. Okuntsev A. S., Ofrikhter V. G. Use geosynthetic materials as drainage and filtration systems. Vestnik Permskogo natsionalnogo issledovatelskogo politekhnicheskogo universiteta. Stroitelstvo i arkhitektura. 2014. No. 1. pp. 134–150.
11. Houari B., Louhibi S., Tizaoui K., Boukli-hacene L., Benguella B. et al. New synthetic material removing heavy metals from aqueous solutions and wastewater. Arabian Journal of Chemistry. 2016. Vol. 9. DOI: 10.1016/j.arabjc.2016.11.010
12. Sabino De Gisi, Giusy Lofrano, Grassi M., Notarnicola M. Characteristics and adsorption capacities of low-cost sorbents for waste water treatment: A review. Sustainable Materials and Technologies. 2016. Vol. 9. pp. 10–40.
13. Svalova K. V. The apparatus for purification of waste water. Patent RF, No. 143084. Applied : 16.01.20 14. Published: 10.07.2014. Bulletin No. 19.