The results of experimental studies on the sorption properties of the material ODM - 2F in aluminum, iron and petroleum products
Keywords: Water preparation, filtering material, the sorption isotherm, ODM-2F
There were considered the processes of electrochemical coagulation and contact filtration for clarification, bleaching and disinfection of the Don River. There were made the experiments to compare electrochemical coagulation to chemical treatment of water with different reagents in conditions of contact filtration. There were defined feculence change, water chromaticity depending on reagent dose and the changе of the total microbial number.
Keywords: Extraordinary situations, water-supply, coagulation, clarification, bleaching, filtration, purification effect.
The problems of drinking water supply of Russian population in rural areas, where the level of life support is lower than in urban areas are not just escalated but become depopulation factor in some regions. While developing and recommending any water treatment technology first of all it is necessary to be guided by the chemical composition of source water. In many rural areas groundwater has become the only source of drinking water, because the level of surface water contamination and hydrometric characteristics make them unsuitable for use. The data for the survey of physical and chemical composition of groundwater and groundwater from wells and public wells used in the drinking water supply of Kuibyshev district in Rostov region are delivered. The analysis showed that Kuibyshev region belongs to the areas of virtual absence in fresh groundwater resources, where groundwater with increased salinity and high content of sulfates and hardness are prevailed .The ecological assessment of using this water desalination method as reverse osmosis was carried out in this study. In areas with no centralized sewerage and sewage treatment facilities, the Kuibyshev region belongs to, using of this method is inappropriate.
Keywords: rural settlement, underground water, drinking water, salinity, hardness, purification, reverse osmosis, soil salinization.
In our work we researched the possibility of producing active chlorine out of fresh natural water through it's direct elecrolysis. We discovered how the anode's corrosion resistanse relates to the ruthenium oxide and iridium oxide ratio in the anode's coating. We also researched their properties: chlorine outcom dependance on current, cell voltage, and active chlorine concentration increase dynamics in processed water from Don river.
Keywords: Emergencies, water supply, disinfection, electrolysis of natural water, chlorides, active chlorine, current density, electrode's lifetime
Examines the main issues concerning the analysis of statistical data from organizations specializing in the operation and maintenance of gas pipelines, as well as dealing with the fixation of accidents and emergency situations in the gas and oil pipelines. For an analytical review of selected reports were five different global gas organization (including the organization of the Russian Federation) that specialize in the collection and analysis of information associated with leaks and blowouts that occur on pipelines.
Keywords: analytical review, the network of gas pipelines, natural gas, alarm, gas industry
The article presents the results of experimental studies exploring the possibility of applying the dewatered sludge water treatment as a component of concrete mixtures to address the issue of disposal. The study of the properties of concrete samples made with sediment content from 0 to 33 percents allow to state the fact of the deterioration of strength by increasing the volume of the dried sludge. If the sludge volume in the concrete is 11%, the strength is reduced by 33 ÷ 35 percents; the strength of the concrete is reduced by 57 ÷ 61 percents when the content of sludge in the solution of about 20 percents; the strength of the concrete is reduced by 75 ÷ 77 percents when the content of sludge in the solution of about 30 percents.
Keywords: Drainless technology, waterworks sludge, waste, concrete, utilization, concrete.
The article is devoted to the scientific research task the determination of the location and size of the leaks in gas pipelines. Shows the main methods for determining the location of leaks, and proposed a mathematical model which can be used to find leaks in gas pipelines. Analyzes the process of change of pressure at different operating modes. Considered three variants of leaks gas.
Keywords: gas leaks, the network of gas pipelines, natural gas, change network settings, test on gas pipeline
Consider the choice of coating anodes for electrolysis of sodium hypochlorite nizkokontsentrovannogo 3% solution of sodium salt of food and water of the Black Sea. Defined corrosion resistance of anodes with different laying oxides of ruthenium and iridium and their characteristics: yield chlorine-current voltage on the cell growth dynamics of the concentration of active chlorine in the solution.
Keywords: oxide coatings, iridium, ruthenium, low concentration of sodium hypochlorite, the corrosion resistance of anodes according to the output current of chlorine, the electrolysis of a 3% solution of sodium edible salt and sea water.
Chlorination is the most common, and in fact no alternative method of disinfection using in Baghdad water supply system. Thus there is an urgent need to control the trihalomethanes (THMs) in drinking water. One of the objectives of this study is to investigate the content of THMs in Baghdad water supply network. Studies showed that the substantial amount of THMs formed in water distribution system, THMs content tends to increase with the distance from the starting point coupled with a decrease of residual chlorine concentration. It is observed that in summer total THMs concentration growth rate in water supply network was 1.3-1.4 times higher than in winter as well as total amount of THMs increase by 30 percent in summer. It was found that the concentration of total THMs never exceeded 80 μg/l – the level specified in National Primary Drinking Water Regulations: Disinfectants and Disinfection Byproducts (Stage 1) established by USEPA. However, in summer total THMs concentration in the water always exceeded 40 μg/l – the level set in accordance with Stage 2 of this Rule. The most of total THMs (73-80%) were bromine compounds (CHCl2Br, CHClBr2 and CHBr3). It is shown that the most efficient way to reduce THMs in Baghdad water supply network is to use the chlorine dioxide for chlorination.
Keywords: chlorine dioxide, chlorination, drinking water, trihalomethanes (THM), water supply network, water supply system
The principal methods of clearance of surface sewage of the motor and transport undertakings were considering.
Keywords: sewage, admixtures, oil products, cleaning
The article contains the approaches of improving the reliability and environmental safety of cleaning waste water treatment plants in the industrial environment, with the help of the express - control methods (oxidation - reduction potential respirometry) and modern technology (biologics, intraband circulation biomass)
Keywords: safety, environmental safety, sewage treatment, waste water, oxidation - reduction potential, respirometry, biologics, intraband circulation biomass
A new device was made to catch and receive surface runoff to sewerage system. The device increases wastewater flow and velocity in the wastewater networks which is provided by flushing and reducing decay of organic and inorganic substances in the networks.
Keywords: Device, surface runoff, flow, flushing, siltation
In conditions of reduction of the costs of wastewater actual value of the minimum speed and current case does not provide the required conditions of self-purification of networks. The studies conducted on the silt areas of current collectors of various diameters made of various materials with the purpose of determining the resistance of precipitation in the trays pipes.
Describes the methodology and instruments of research. The data obtained allowed with sufficient certainty have established roughness coefficient bottom sediments of sewers.
Keywords: drainage network, the rate of self-purification, sewer, roughness, bottom sediments.
The question of an assessment of emission of greenhouse gases from a water complex of housing and communal services is considered. The bundled software, allowing to calculate emission of dioxide of carbon from sewage treatment processes taking into account specific conditions of their course is created. Having defined specific emissions from concrete constructions and stages of transportation and sewage treatment it is possible to supervise and regulate processes of transportation and processing of sewage
Keywords: emission of greenhouse gases, emission of dioxide of carbon, processing of sewage, bundled software, specific emissions
Measurements of partial pressure of carbon dioxide on various treatment facilities of the sewerage are carried out. It is revealed that the partial pressure of carbon dioxide can be an indicator of environmental friendliness of work of treatment facilities. It is offered to apply an indicator of redox process to expeditious control of work of sewer treatment facilities - rH2. The bundled software is developed for simplification of calculations of emission of carbon dioxide
Keywords: emission of greenhouse gases, emission of dioxide of carbon, partial pressure of carbon dioxide, processing of sewage, bundled software
In the model aeration tank and pilot conditions, there are shown the effectiveness of ceramic aerators made of Artik tufa which is mined in the Republic of Armenia and determined technological parameters of biological and oxidative purification of waste water in the continuous and discontinuous mode of aeration.
Keywords: aerators tuff, continuous and discontinuous mode of aeration, Artik field, biological and oxidative purification, waste water, process parameters.
The basic problem in systems engineering (water), high-rise buildings, and buildings with unusual design and space-planning decisions. The task of research work in this field - the development of the algorithm optimization of water supply systems of buildings.
Keywords: water system, optimization, hydraulic reliability, energy efficiency, automation, the algorithm
The influence magnetic field on treatment of electroplating wastewater and sludge has been investigated. The increase in efficiency of processing electroplating wastewater and sludge by using magnetic field has been noted.
Keywords: water treatment, electroplating wastewater, magnetic field, electrocoagulator
The treatment of electroplating wastewater in electrocoagulator with bulk anodes has been described. Passivation and depassivation in metal shavings process chemistry has been analyzed.
Keywords: water treatment, electroplating wastewater, activation, electrocoagulator, electrode, passivation
The mathematical model of storage reservoir has been deduced. The deposition rate of particles in reservoir has been calculated. It is concluded that storage reservoir is a preliminary sedimentation tank.
Keywords: storage reservoir, preliminary sedimentation tank, mathematical model, deposition rate
The results of the study ambulances unpressurized water filter Alexander Rostov-on-Don. Studied the results of operation of rapid filters in the application of organic and mineral coagulant flocculent and exceeding design capacity of more than 1.5 times. The measures to restore the characteristics of the filter load.
Keywords: rapid filters, filter loading, washing, residual contamination
The model of a platform of a predrying of the precipitation which is forming at stations of purification of natural waters of superficial sources, with data presentation of the comparative characteristic of its work is described. The specified methodology of calculation of a platform of a predrying of a deposit taking into account factors of an intensification of process is offered by engineering and technological means.
Keywords: water deposit, predrying platform, evaporation, filtration, capillary phenomenon
Article is devoted studying of design parameters water jet aerator. Water jet aerator it is used for saturation of water by oxygen on purification works. In article research methods are described, in particular, possibility of use of computer modeling by means of program complex ANSYS 11 is considered.
Keywords: Water jet aerator, purification works, computer modeling, and jet aeration.