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UDC 628.161.2:546.72/.711

Govorova Zh. M., Govorov O. B.

Studies and experience of introducing the technology of ground water de-ironing and softening in the Moscow Area


The analysis of physical and chemical parameters of ground water quality from the wells of water intake facilities No. 4 and 5 in Zhukovskii town, Moscow Area, was carried out. Based on the results the priority pollutants – iron compounds, hardness salts, dissolved gases (carbon dioxide and hydrogen suphide) were identified. The technology of ground water conditioning with the use of bioreactors with jet vacuum ejection, subsequent filtration in moving bed filters and chemical water softening in a vortex reactor was substantiated. Under the conditions of an operating water intake field trials were carried out in a plant that comprised the models of bioreactor, degasifier, moving bed filter and vortex reactor. The process parameters of the main facilities operation that ensured the sustainable standard quality of the water after purification were specified. It was found that after bioreactor and filter charging water de-ironing alongside with the removal of dissolved gases was taking place. The efficiency of purification at the first stage is 88.9%, after filtration the concentration of iron in water does not exceed 0.3 mg/l. The required dosage (3.4 mg-eq/l) and concentration of sodium hydroxide solution (4%) that ensured the required level of preliminary de-ironed water softening were determined. The data on the implementation of the efficient technology of ground water conditioning at design stage and at the stage of reconstruction and upgrade of water pumping station No. 5 in Zhukovskii town are set.

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UDC 628.112.23:628.168.4

Tsabilev O. V., Strelkov A. K., Bykova P. G., Zanina Zh. V., Vasiliev V. V.

Treatment of Artesian Water for Domestic Water Supply


An example of solving the task of improvement of artesian water quality up to normative values with the help of baromembrane technologies is given. A flow chart of water treatment for household needs of a settlement optimal from the ecological and economical points of view is described. The comparative results of the technological calculation of various schemes of water demineralization and softening including the processes of ion exchange, nanofiltration and reverse osmosis are presented.

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UDC 628.168.3:662.997


Stabilization Treatment of Geothermal Water


Stabilization treatment of geothermal water with the help of degasification and with the use of a crystalline initiator are considered. The experience of operation of geothermal equipment in the case of disturbance of carbonate-calcium equilibrium in water is presented. Degasification of geothermal water treated preliminary for carbon dioxide up to the equilibrium value makes it possible to speed up crystallization of calcium carbonate in the contact medium. It is proved that the more is the drop of pressure in a crystallizer the more is the concentration of a suspension being generated. The speed of separation of the solid phase of calcium carbonate from the geothermal water solution is proportional to the component of the pressure drop in the crystallizer from equilibrium to the final value.

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