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UDC 628.1/.2 (211-17)
Murashev S. V.
Systems of water and wastewater treatment for offshore and coastal facilities under the conditions of Arctic climate
Summary
The aspects of designing water supply and wastewater treatment systems for offshore Arctic facilities – floating drilling units, platforms and terminals are considered. Owing to the special conditions of operating floating drilling units in Arctic marine during long ice seasons a number of additional requirements to the water treatment systems shall be taken into consideration. Among them is reduction on the use of tankers-water carriers and of the fresh water reserve at the offshore facilities inter alia by abandoning the discharge of grey wastewater after proper treatment into the sea. Designing floating facilities of special purpose with the use of advanced small-scale and efficient systems of water purification and wastewater treatment – life-support vessels that is a separate trend in shipbuilding has been suggested and justified. Life-support vessels can be used for water transportation and waste disposal or as seasonal water and wastewater treatment systems for different purposes including emergency conditions.
Key words
water treatment , desalination , membrane technology , water treatment , offshore Arctic facilities
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UDC 628.3(510 + 519.5)
Meshengisser Yu. M., Galich D. R., Gomozova E. V., Vu Min
Experience of Introduction of Ecopolymer Equipment in Countries of the Eastern-Asian Region
Summary
The experience of introduction of the EcopolymerGroup’s equipment in the countries of the Eastern Asian Region on the example of China and South Korea is described. In China aerators are used for treatment of municipal (communal) and industrial-municipal discharges (in industrial parks) and for treatment of industrial enterprises wastewater as well. The equipment introduction is made mainly at large treatment facilities of over 150 thousand m³/day capacity. In South Korea the Ecopolymer aerators are used at treatment facilities of concentrated flows with high concentration of activated sludge from unloading plants, pig farms, poultry factories, in systems with membrane technologies of wastewater treatment.
Key words
treatment facilities , municipal and industrial wastewater , aerator , interrupted aeration , membrane technology
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UDC 628.161:66.081.63
DOI 10.35776/VST.2024.03.07
Barsukov Oleg, Larionov S. Iu., Panteleev Aleksei, Riabchikov Boris
Ways to reduce fouling of separation membranes and increase the performance of membrane apparatus (a review)
Summary
The widespread use of membrane technologies in the energy sector in water purification processes, wastewater treatment and other areas poses questions of their improvement in order to increase the economic efficiency, performance of membrane separation apparatus, reduce the amount of secondary waste, etc. Potentials are being sought to improve these indicators. Moreover, if the highest level has currently been reached in the development and production of membranes, and no further dramatic improvements are visible so far, then in relation to the design it is believed that there are still potentials. The paper discusses options for increasing the efficiency of membrane separation apparatus by means of the external effects on the processed water or on the membrane apparatus. This is the pulsation of the liquid flow, ultrasonic impact on it, rotation of special inserts or the membranes themselves, vibrations of the membrane element. The complexity of their design and the prospects of application for different stages of purification and concentration processes are estimated.
Key words
membrane module , membrane technology , concentration polarization , reverse osmosis and nanofiltration plants , separating diaphragms , LF oscillations , ultrasonic waves , rotation , membrane vibrations , Roсhem apparatus , New Logic Research , VSEP system
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