Acidification is a device intended for cleaning waste water, air and production of food products, and can be used in individual housing construction in rural areas, camp sites, lodges and resorts. Operating costs for the installation ASFR minimal, as acidification serviced 1 time a year, and thereactor – 1 time per month. Coming through the fan in photoreactor the air is absorbed by green plants of vegetable crops and freed from impurities without the cost of electricity, and needs only the harvest of vegetables. The process of acidification of the organic substances of the waste water is initiated by the biocenosis held Ershova nozzle of polyamide fibers fixed in the septic tank.

Keywords: acidification, wastewater treatment, zero waste, food

The article presents a comparative analysis of modern methods of sewage sludge utilization in Russia and abroad. A comprehensive analysis of the possible use of sludge in the conditions of typical treatment facilities of the Rostov region, proposed engineering and environmental solutions for the secondary use of sludge sewage as a fertilizer on the example of the company "Istok" Kamensk-Shakhtinsky Rostov region.

Keywords: utilization of sewage sludge (OSV), environmental safety, deworming, economic efficiency

The article suggests the use of agricultural wastes of the shell of the anacard nut, cultivated in the Republic of Cote d'Ivoire, as a sorption material. This carbon sorbent (0.5 g / l) was used to remove heavy metals, namely iron (Fe), C = 1.05 mg / l, aluminum (Al), C = 0.10 mg / l) from production waste water of the machine-building plant of LLC Rostselmash (Rostov-on-Don). According to the experimental data, the efficiency of metal removal depends on the sorption time and amounts to: for iron - from 28.6 to 97.1%, for aluminum - from 10 to 90% (Table 2). The concentration of metals in treated wastewater (iron C = 0.03 mg / l and aluminum C = 0.01 mg / l) corresponds to the norms of MPC (iron C = 0.1 mg / l, and aluminum C = 0.04 mg / l), which makes it possible to discharge them into the city water drainage system. From the experimental data, it was concluded that this material can be used as a sorbent.

Keywords: walnut shell anacard, Republic of Cote d'Ivoire, agricultural waste, carbon sorbent, wastewater treatment, heavy metals removal

The advantages and disadvantages of reagent methods for cleaning groundwater from hydrogen sulphide are considered. The time of contact of hydrogen peroxide with hydrogen sulphide contained in the treated water was determined experimentally before the appearance of opalescence caused by the formation of colloidal sulfur. The equation for the time dependence for the start of the hydrogen sulfide oxidation reaction with the concentration of H2O2 is obtained, which makes it possible to calculate the required contact time of the treated water with hydrogen peroxide at a different content of hydrogen sulfide in the initial water.

Keywords: groundwater; water supply; cleaning, hydrogen sulfide, rural settlements, chlorine-containing reagents, hydrogen peroxide

"Environmental safety of rural areas" means the safety of natural and artificial ecological systems, technospheric objects and the population. On the example of Neklinovsky district of Rostov region the key role of ecological monitoring of drinking water quality in the system of environmental safety

Keywords: ecological safety of rural areas, sustainable development of rural areas

It is noted that traditional technologies do not provide removal of organic substances from water, and primary chlorination leads to the formation of highly toxic halogen organic compounds in it. The perspective of using membrane technologies for water purification of surface sources based on: micro-, ultra- and nanofiltration, reverse osmosis, allowing to solve the set task is shown. This was realized during the purification of the Don and Moscow rivers with the use of the biosorption-membrane method, which involves sorption on activated charcoal, biological oxidation of organic substances and filtration through the membrane. The obtained results give the basis for wide application of this method in treatment plants of small settlements, which is especially important for the south of the country, in particular, the Rostov region and the Republic of Kalmykia.

Keywords: микрофильтрация, ультрафильтрация, нанофильтрация, обратный осмос, ультрафильтрационные мембраны, биосорбционно-мембранный реактор, очистка природной воды, порошкообразный активный уголь, биосорбционно-мембранный метод, мембранное фильтрование

An analytical review of the production of biogas from plant substrates is giventerprise.

Keywords: biogas, substrate, bioreactor, technologies for biogas production

When reconstructing left-bank sewage treatment plants, it is proposed to intensify the work of primary sedimentation tanks by including the acidification zone. When reconstructing aerotanks, it is expedient to allocate an anaerobic zone and a nitrification zone. The introduction of projected measures allows to reach the normative parameters of nitrogen and ammonium nitrogen and phosphorus discharge with an increase in the estimated flow rate to 460 thousand m3 / day.

Keywords: sewage, treatment plants, reconstruction, best available technologies, primary settling tanks, acidification, aerotanks, anaerobic zone

Examined the effectiveness of using aeration-lighting installation in the process of biological wastewater treatment.

Keywords: biological filter, biological treatment, energy efficiency, water treatment, lighting, aeroblast, biomass, activated sludge, microorganisms, aeration tank, aerator

The article presents the opportunity to use bioengineering facilities for contaminated surface runoff treatment. Examples of existing technological solutions are given. For instance, in the Institute of hydrobiology NAS of Ukraine the use of bioplatos as post-treatment of water in channels through which water is transported from the Dnieper, was proposed and studied; in the Engineering research center (ERC) “Potential-4” various types of engineering and biological facilities based on the closed bioplate of hydroponic type used in wastewater treatment technologies as a water-protective structure that combines the main elements of treatment using microflora immobilized on an inert substrate and higher aquatic plants, were suggested; scientists of Khabarovsk Institute of Engineering Transport have developed a method for runoff treatment from an oil refinery using a "filter" from thickets of cattail and calamus. The authors of this article presented a technological scheme for treatment both acidic and weak acidic surface runoff in bioengineering construction using macrophyte plants as a complex of hydatophytes, hydrophytes, and helophytes. It is found out that runoff treatment in the proposed facility varies from 72 to 98%.

Keywords: biological pond, biocenosis, hydatophyte, hydrophyte, helophyte, heavy metal, contaminated runoff, filtration, phytophilter, sewage treatment plant

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