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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
Summary
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.
Key words
filter , deferrization , aeration , bioreactor , ground water , degasification , softening , floating media , field trials , conditioning , jet vacuum ejection
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UDC 66.021.3:66.069.84
DOI 10.35776/VST.2024.07.01
Riabchikov Boris, Larionov S. Iu., Kasatochkin A. S., Gizzatullin Artur, Panteleev Aleksei
Advanced solutions for aeration, deaeration-degassing and decarbonization processes
Summary
The processes of saturating water with oxygen and removing highly soluble oxygen and poorly soluble gases, such as carbon dioxide, ammonia, hydrogen sulfide, methane, radon are widely used in industry, energetics, municipal and individual water treatment. For these purposes, many designs of devices based on different operating principles are offered. JSC Research and Production Company Mediana-Filter is the only one in the Russian Federation that has developed and successfully used a series of vacuum ejection devices of different capacities for most of these purposes in its projects. A complex of vacuum ejection devices of different unit capacities has been developed – from 1 to 125 m3/h for aeration, deaeration-degassing and decarbonization, i. e., air stripping after heating, removing carbon dioxide generated by reverse osmosis and ion exchange units, removing dissolved gases – hydrogen sulfide, radon and chlorinated organics. It helps to design an effective and economical complex of industrial installations of various purposes and capacities.
Key words
vacuum , deferrization , aeration , water treatment , degasification , decarbonization , ejector , water , air , deaeration , oxygen saturation
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UDC 628.168.3:662.997
AHMEDOV G. Ya.
Stabilization Treatment of Geothermal Water
Summary
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.
Key words:
suspended substances , geothermal water , salt precipitation , calcium carbonate , degasification , softening
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