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Retrospective analysis of scientific and technical literature concerning natural and wastewaters treatment in terms of nanoeffects is performed. It’s shown that the present level of nanotechnology development allows to achieve high efficiency in removing chemical and biological polluants from water using such processes as ultra- and nanofiltration, sorption, photocatalytic mineralization and coagulation.
Key words: treatement and usage of wastewaters; displaying and usage of nanoeffects; ultra- and nanofiltration; sorption; photocalitic mineralization; coagulation.
Bibliogr.: 23 ref.

Results of bench tests of two-membrane elements with ultrafiltration membranes of «Norit» and «Inge» companies for the evaluation of possibilities of modernization of technology of water treatment for the purpose of increasing of protective functions of treatment facilities are presented.
It is shown that the most favorable in terms of economic and technical parameters for processing of river water with added coagulator is the ultrafiltration membrane produced by «Norit» company.
Key words: water treatment, potable water posttreatment; membrane technology; an ultrafiltration on hollow fiber membranes; membranes of «Norit» and «Inge» companies; technical and economic parameters.<>br Tabl. 3, ill. 3, bibliogr.: 4 ref.

Real technological possibilities of utilization of flush water of filtering facilities independently of the accepted scheme for water treatment are shown. The presented engineering solutions offered as a result of collaboration of FGUP Saint-Petersburg of scientific research institute KH and Joint-Stock Company «PI «Leningrad Vodokanalproekt», allow to utilize the flush waters at both one-stage and two-stage water treatment schemes.
Key words: water treatment plants; filtering facilities; flush water; utilization; one-stage water treatment scheme; two-stage water treatment scheme.

The approached equation of filtration speed with a minimum number of the coefficients defined experimentally on the basis of which it is possible to calculate the speed and the volume of filtrate at any moment of time is resulted. The technique of experimental data processing is developed on the basis of which the coefficients and parameters of investigated process are calculated.
Examples of practical usage of established equation are presented.
Key words: submerged membrane bioreactor; the equation for filtration speed; the technique of experimental data processing for calculation of investigated process coefficients and parameters; practical usage of the equation.
Ill. 3, bibliogr.: 3 ref.

The problems of stability of water feed systems operating with closed irrigation system with application of adjustable pump units (APU) are considered.
Criteria and conditions for continuous management of distributed systems of water feed and water distribution when using АPU are presented.
Key words: water feed systems; closed irrigation system; adjustable pump units; throttleable systems and systems with frequency control of pump impeller rotation; comparative analysis of stability; stability margin.
Ill. 2, bibliogr.: 4 ref.

The comparative analysis of validity and reliability of measurements of water flow in pipelines of big diameters by commonly used on practice pulse-time-and vortex immersed flowmeters, proceeding from the physical principles on which the operation of these devices is based, is presented. It is shown that the usage of vortex immersed counters has a number of advantages over ultrasonic flowmeters; a fair stability to external influencing factors provides a reliability of instrument readings in real practice operation.
Key words: pipelines of big diameters; water flow; pulse-time flowmeters; vortex immersed flowmeters; efficiency and reliability analysis
Tabl. 1.

A new method of recurrent xenobiotic additions (on exemples of dodecyl sulfate and synthetic detergent) is developed and successfully applied to studying the tolerance of plants that are prospective tools to remediate polluted aquatic systems. The method was applied and proved to be efficient when studying 5 species of aquatic macrophytes (Elodea canadensis Michx., Potamogeton crispus L., Najas guadelupensis L., Fontinalis antipyretica L., and the macrophyte OST-1). Under the experimental conditions used, the maximal tolerable load of the surfactant sodium dodecyl sulphate on the system with the macrophyte OST-1 was 460,0 mg/L the incubation time being 213 days over this period. The maximal tolerable load of detergent for this macrophyte was 1687,5 mg/L (the incubation time being 314 days).
Key words: ecotechnology; polluted water treatment; phytoremediation; aquatic plants; macrophytes; xenobiotics; recurrent additions; surfactants; sodium dodecyl sulphate; detergents.
Tabl. 4, bibliogr.: 12 ref.

In the aquatic microcosms with the anionic surfactant, (sodium dodecyl sulphate), in presence of the phytomass of the macrophyte OST1, the acceleration occurred of the restoration of the normal level of the surface tension. The level of the surface tension changed towards those of the pure water. This result was in accord with the hypothesis that in the presence of the macrophyte, an increase in the rate of the removal of the surfactant from water takes place. The results contribute to better understanding of the role of plants in the fate of the aquatic pollutant that represents the class of synthetic surfactants. The results confirm also the suggestion that plants are prospective agents to be used to phytoremediate the environments polluted with synthetic surfactants and detergents.
Key words: surface tension; ecotechnology; phytotechnology; polluted water treatment; phytoremediation; aquatic plants; macrophytes; xenobiotics; surfactants; sodium dodecyl sulphate.
Tabl. 1, bibliogr.: 8 ref.

The inaccuracies and basic errors (from the author’s point of view) in the text of the document are discussed.
Key words: polluting substances; admissible standards of discharge with treated waters; admissible discharge mass; necessary and sufficient degree of wastewater treatment; efficiency of treatment facilities; dilution ratio; mixture factor.
Tabl. 2, bibliogr.: 2 ref.

The paper is aimed to solve the issues related to methodology of establishing and adjusting the standards of natural water quality in compliance with European Classification of water bodies and methodologies to determine the environmental status of rivers.
The paper provides for analysis of regulatory documents on management of water quality of water bodies, describes the requirements of regulatory documents, and highlights strengths and weaknesses of water quality standardization mechanism.
Key words: standards of water storage quality; water bodies, admissible concentration limit Concentrations (ACL); admissible discharge limit (ADL); water quality standardization; discharge limits.
Bibliogr.: 10 ref.

The hydroaudit actuality as a current expert estimation of water storage state in the conditions of increasing deficiency of fresh water is shown. Hydroaudit carrying out at all stages of investment or industrial activity allows to minimise financial losses for operating water legislation violation, in need of emergency liquidation of consequences of exhaustion of water-bearing horizont, and also at the decision of variety of other problems of water consumption and water removal.
Key words: water supply; water removal; fresh water world’s reserves; hydroaudit as a stage of investments validation for water supply and water removal of object.

Company KSB offers a novelty: pump Amarex N 32 – very ligntweight and compact.
Owing to constructive modifications the efficiency of the engine is increased by 10%.
Pump Amarex N 32 is applied for pumping of sewage water of any sort: in municipal services, the industry and technological processes. Due to its compact sizes this pump fits for installation in tanks and narrow mines. Because of stators are not pasted in the engine case, but are connected with it by plug-in connector, the engine efficiency managed to be increased by 10%.
Key words: pump Amarex N 32; plug-in connection of stators; efficiency.
Ill. 3.