scholarly journals Development of water saving technology for water supply system of industrial enterprises

2021 ◽  
Vol 274 ◽  
pp. 08004
Author(s):  
Juriy Lavirko ◽  
Eduard Akhmetov ◽  
Rimma Akhmetova ◽  
Natalia Bikeeva
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Supply ◽  
Practical Importance ◽  
Treated Wastewater ◽  
Practical Significance ◽  
Technical Solution ◽  
Industrial Enterprises ◽  
Reduction Of Emissions ◽  
Optimal Set

The object of the study is the water supply and sanitation system of an industrial enterprise. Currently, many enterprises do not use the treated industrial waste water in the water supply cycle. Therefore, the use of treated wastewater is of practical importance. The scheme of thermal treatment of waste water for obtaining pure condensate by evaporation is proposed. The main results of the study are the technical solution for the development of the enterprise's wastewater treatment complex. Pure condensate is obtained in an instant boiling evaporator. The research method is based on the calculation of energy costs in wastewater treatment for different types of waste water. The results of the study allow us to determine the optimal set of energy equipment for obtaining pure condensate and its further use. The specific practical significance lies in the development of a technical solution that helps the treatment of wastewater and the reduction of emissions into the water basin.

ENVIRONMENTAL ASPECTS OF WATER SUPPLY AND DRAINAGE AT THE ENTERPRISES OF THE TAMBOV INDUSTRIAL HUB

2020 ◽  
pp. 41-45
Author(s):  
Ryazanov A.V. ◽  
Mozharov A.V. ◽  
Zawershinskiy A.N.
Keyword(s):  
Wastewater Treatment ◽  
Surface Water ◽  
Water Supply ◽  
Negative Impact ◽  
Water Bodies ◽  
Toxic Waste ◽  
Treated Wastewater ◽  
Industrial Enterprises ◽  
Treatment Facilities ◽  
The City

One of the reasons for the current global environmental crisis is the intense anthropogenic impact on water bodies, which results in their depletion and pollution. The source of the negative impact is, in particular, insufficiently treated wastewater from industrial enterprises. Depending on the technological processes used, toxicants can enter the water bodies along with the effluents, which pose a serious threat to them. The aim of the work is to consider the features of water supply and wastewater disposal of enterprises that make up the industrial hub of the city of Tambov. The work used methods of analysis of technical documentation and statistical reporting characterizing the qualitative and quantitative composition of wastewater. Water supply of the considered enterprises is carried out from the city water supply network and own artesian wells. All enterprises do not have full-fledged treatment facilities capable of carrying out a full cycle of wastewater treatment with bringing them to a standard clean state. The use of galvanic technologies in production requires preliminary cleaning at local treatment facilities. Then the wastewater goes to the city wastewater treatment plant, where it is processed together with the municipal wastewater. Normally clean and storm water flows directly into the surface water body. The largest enterprise of the industrial hub pumps its industrial effluents into deep aquifers. Over the entire period of its operation, over 52 million m3 of liquid toxic waste was injected. As a result, a zone of contaminated groundwater was formed under the enterprise and adjacent territories. In them, the excess of the maximum permissible concentrations for a number of parameters is constantly noted. Thus, this enterprise is a source of powerful, direct negative impact on groundwater and, indirectly, on surface water. This led to the emergence of a zone of sustainable environmental risk.

scholarly journals Optimal Implementation of Wastewater Reuse in Existing Sewerage Systems to Improve Resilience and Sustainability in Water Supply Systems

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2004
Author(s):  
Aakash Dev ◽  
Timo C. Dilly ◽  
Amin E. Bakhshipour ◽  
Ulrich Dittmer ◽  
S. Murty Bhallamudi
Keyword(s):  
Wastewater Treatment ◽  
Water Supply ◽  
Wastewater Reuse ◽  
Treated Wastewater ◽  
Water Supply Systems ◽  
Test Cases ◽  
Decentralized Wastewater Treatment ◽  
Graywater Reuse ◽  
The Cost ◽  
Supply Systems

A transition from conventional centralized to hybrid decentralized systems has been increasingly advised recently due to their capability to enhance the resilience and sustainability of urban water supply systems. Reusing treated wastewater for non-potable purposes is a promising opportunity toward the aforementioned resolutions. In this study, we present two optimization models for integrating reusing systems into existing sewerage systems to bridge the supply–demand gap in an existing water supply system. In Model-1, the supply–demand gap is bridged by introducing on-site graywater treatment and reuse, and in Model-2, the gap is bridged by decentralized wastewater treatment and reuse. The applicability of the proposed models is evaluated using two test cases: one a proof-of-concept hypothetical network and the other a near realistic network based on the sewerage network in Chennai, India. The results show that the proposed models outperform the existing approaches by achieving more than a 20% reduction in the cost of procuring water and more than a 36% reduction in the demand for freshwater through the implementation of local on-site graywater reuse for both test cases. These numbers are about 12% and 34% respectively for the implementation of decentralized wastewater treatment and reuse.

Water reuse for irrigation from waste water treatment plants with seasonal varied operation modes

2004 ◽  
Vol 50 (2) ◽  
pp. 47-53 ◽  
Author(s):  
P. Cornel ◽  
B. Weber
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Treatment ◽  
Treatment Process ◽  
Waste Water Treatment ◽  
Treated Wastewater ◽  
Nitrifying Bacteria ◽  
Water Treatment Plants ◽  
Operation Modes ◽  
Waste Water Treatment Plants

Irrigation periods are usually limited to vegetation periods. The quality requirements for treated wastewater for disposal and for reuse are different. The reuse of water for irrigation allows partly the reuse of the wastewater's nutrients (N and P). Outside the irrigation period the water must be treated for disposal, thus nutrient removal is often required in order to avoid detrimental effects on the receiving surface water body. Only wastewater treatment plants with different operation modes for different seasons can realise these requirements. The nitrification is the most sensitive biological process in the aerobic wastewater treatment process. At low water temperatures the nitrifying bacteria need several weeks to re-start full nitrification after periods without NH4-removal. Therefore it is necessary to develop options for waste water treatment plants which allow a fast re-start of the nitrification process. Based on theoretical considerations and computer simulations of the activated sludge treatment process, one possibility for implementing a wastewater treatment plant with different seasonal operation modes is evaluated.

scholarly journals Epidemiological risks of endoparasitoses spread by municipal waste water

2015 ◽  
Vol 52 (3) ◽  
pp. 188-194 ◽  
Author(s):  
A. Dudlová ◽  
P. Juriš ◽  
P. Jarčuška ◽  
L. Čisláková ◽  
I. Papajová ◽  
...  
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Developmental Stages ◽  
Wastewater Sludge ◽  
Indirect Detection ◽  
Treated Wastewater ◽  
High Concentration ◽  
Epidemiological Aspect ◽  
Helminth Eggs

AbstractThe occurrence of developmental stages of endoparasite germs (cysts, oocysts, protozoa, and helminth eggs) as an indirect detection factor of endoparasitoses circulation in the environment, was examined in raw municipal wastewater, sludge and biologically cleaned waste water. Examination of municipal wastewater and sludge from five monitored wastewater treatment plants (WWTPs) in east Slovakia, from various fractions of municipal wastewater, confirmed 35.87 % positivity of samples for the endoparasitic germs. Among of all analysed samples 11.09 % were protozoan oo(cysts) and 20.87 % were helminth eggs. 3.91 % of samples showed positivity to both the helminth eggs and protozoan oo(cysts). In the raw wastewater the protozoa comprised of Giardia spp. (1.08 %) and Entamoeba spp. (1.08 %). The helminth eggs primarily consisted of Ascaris spp. (4.35 %) and strongyle-type eggs (3.26 %). No germs of protozoa or helminths were found in the treated wastewater. However, the highest presence of the germs was found in drained stabilised sludge. The average number of oo(cysts)/kg was 2.86±0.24 and the average number of helminth eggs/kg was 5.77±0.09. In all kinds of sludge, obtained during the process of wastewater treatment, there were protozoan (Giardia spp., Cryptosporidium spp., Entamoeba spp.) and helminths eggs (Ascaris spp., Trichuris spp., Taenia spp., Hymenolepis spp., or strongyle-type eggs) presented. In drained (condensed) stabilised sludge the eggs of Capillaria spp. and Toxocara spp. were also detected. From the epidemiological aspect the sewage sludge, due to high concentration of protozoal oo(cysts) or helminth eggs, represents a significant epidemiological risk for the endoparasitoses dissemination.

scholarly journals Safety of Water Supply Systems and Wastewater Treatment of Industrial Enterprises

2016 ◽  
Vol 5 (5) ◽  
pp. 64-74
Author(s):  
Шилков ◽  
Vladimir SHilkov ◽  
Аникин ◽  
Yu. Anikin
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Water Supply ◽  
Integrated Approach ◽  
Water Supply Systems ◽  
Critical Systems ◽  
Basic Principles ◽  
Strategic Risk ◽  
Industrial Enterprises ◽  
Supply Systems

In this article, the necessity of integrated approach to the analysis and solution of problems of safety of water supply and wastewater treatment are declared. The results of the study the main problems of the systems of production of water supply and wastewater treatment are described. Practical measures for solving problems are proposed. Pressing need of application of means of informatization, strategic risk analysis methods and innovative technologies of water treatment are declared. The basic principles of safe and effective critical systems of water supply and wastewater treatment in the sphere of production are proposed.

scholarly journals Methods for combined treatment of oil-containing waste water of transportation enterprises

2021 ◽  
Vol 264 ◽  
pp. 01043
Author(s):  
Irina Okhremenko ◽  
Abdumalik Rizaev
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Water Supply ◽  
Combined Treatment ◽  
Water Supply Systems ◽  
Oily Wastewater ◽  
Closed Water ◽  
Supply Systems ◽  
Compact Module

The article discusses modern schemes for the treatment of oily wastewater from transport enterprises. The features of closed water supply systems and the fundamental provisions for the design of a compact module for wastewater treatment of transport enterprises are revealed.

scholarly journals Improving the technology of closed water supply at agro-industrial enterprises

2020 ◽  
pp. 146-153
Author(s):  
Y. B. Mosiichuk ◽  
P. D. Khoruzhyi ◽  
I. P. Nedahkovskiy
Keyword(s):  
Wastewater Treatment ◽  
Water Supply ◽  
Quality Indicators ◽  
Wastewater Treatment Plants ◽  
Sewage Treatment ◽  
Water Supply Systems ◽  
Biological Wastewater Treatment ◽  
Preliminary Treatment ◽  
Industrial Enterprises ◽  
Closed Water

The article analyzes the ways to improve the water supply system at agro-industrial enterprises. It is stated that the Institute of Water Problems and Land Reclamation of NAAS proposed to improve closed water supply systems at these enterprises to spend water and energy rationally and economically by developing highly efficient wastewater treatment technology to reuse wastewater and its sediments for technological needs. During the work, the main tasks to be solved were the analysis of the reasons of unsatisfactory operation of traditional wastewater treatment plants and their current quality indicators and improvement of the rational technological scheme of closed water supply at the agro-industrial enterprises. Scientific and practical results were obtained by analyzing the operation of wastewater treatment plants of industrial enterprises dealing with agricultural products processing, their quality indicators and known methods of improving technological schemes of biological wastewater treatment. It was specified that traditional technology of biological wastewater treatment do not ensure the proper treatment quality, as the quality of wastewater from enterprises has significantly deteriorated due to the inflow of harmful impurities (xenobiotics, heavy metal ions, etc.) and high concentrations of organic matter, the content of which amount to: suspended solids> 1000 mg/dm3, COC> 10000 mgO2/dm3, BOC5> 6000 mgO2/dm3, BOCcomplete> 2000 mgO2/dm3, nitrogen and phosphorus ≤50 mg/dm3, which prevents the effective operation of aeration tanks. The practicability of improving the "bioconveyor" technology by downward filtration through fibrous loading in bioreactors and upward filtration through floating filter loading in contact and clarifying filters to increase the efficiency of wastewater treatment was scientifically substantiated. It was proved that this method provides high efficiency of biological wastewater treatment by reducing the amount of sediment and the absence of reverse activated sludge, and thus reducing capital and operating costs. Natural mechanisms of household sewage treatment with reuse of water and sediments when cultivating agricultural crops are used as much as possible are used in the specified system of water supply at agro-industrial enterprises. The optimal design and technological parameters of these structures are determined using the recommendations developed on the basis of our experimental research. The proposed technology of closed water supply at agro-industrial enterprises provides for the separation of water supplied to consumers into technical and drinking one, as well as supplements of sewage treatment plants with bioreactors and contact-clarifying filters. Such systems ensure a minimum intake of water from natural water sources having its preliminary treatment directly in water reservoir, maximum use of treated wastewater and protection of the environment against wastewater pollution.

scholarly journals ENVIRONMENTAL CONSIDERATIONS OF LARGE WASTEWATER TREATMENT PLANTS – THE CITY OF NIŠ CASE STUDY

2019 ◽  
pp. 015
Author(s):  
Dejan Vasović ◽  
Sandra Stanković ◽  
Ljiljana Takić
Keyword(s):  
Wastewater Treatment ◽  
Water Supply ◽  
Wastewater Treatment Plants ◽  
Treatment Plant ◽  
Special Problem ◽  
Public Utility ◽  
Treated Wastewater ◽  
The Republic ◽  
The City ◽  
Wastewater Collection

Nowadays, the Republic of Serbia is at the bottom of the scale of European countries in terms of public utility equipment of the respective communal infrastructure particularly within the area of wastewater collection and treatment. The current situation in the area of water resources management in the Republic of Serbia indicates that the basic problems are insufficient construction of sewerage infrastructure in cities, i.e. insufficient coverage with the sewerage network of users connected to either public or private water supply network, followed by an insufficient number of constructed and operative wastewater treatment plants. In this sense, a particular problem is a requirement for relatively large initial investments in wastewater collection and treatment sector. Also, a special difficulty is the low price of delivered and channeled water within the existing system of public utilities, which is insufficient to provide maintenance of the existing water supply and sewage systems, regardless the future development and improvement of the existing system. Currently, only 10% of total produced wastewater quantity is treated in the Republic of Serbia, with different procedures and with uneven and, most often, insufficient purification effects. In addition to wastewater generated by the population (i.e. households connected to the sewer system), the special problem is the inadequate treatment of industrial wastewater. On the other hand, disposition of treated wastewater, disposal of separated sludge from the treatment process, odor and pest control, noise control, working conditions, etc. are significant challenges for the scientists, professionals and operators. Therefore, the aim of this paper is to comprehensively examine all environmental aspects on the example of a large wastewater treatment plant which is to be gained by the city of Niš, in the very near future.

Technical solutions for prevention thermal pollution of ponds within urbolandscape

2017 ◽  
pp. 60-66
Author(s):  
Tamila Titova ◽  
Rasul Akhtyamov ◽  
Elina Nasyrova
Keyword(s):  
Heat Exchanger ◽  
Water Supply ◽  
Power Plants ◽  
System Analysis ◽  
Cold Water ◽  
Practical Importance ◽  
Thermal Pollution ◽  
Technical Solution ◽  
Domestic Water ◽  
Technical Solutions

Objective: The development and scientific substantiation of technical solutions for prevention thermal pollution of cooling pond of power facilities. Methods: Patent study, methods of system analysis. Results: Found that cooling ponds in which discharged heated water from electric power facilities, leading to thermal pollution. In connection with which the waters become unfit for housing and communal services, namely drinking and domestic water supply and recreational water use. The existing technical solution for preventing thermal pollution of water bodies have a number of drawbacks, namely low reliability due to the complexity and bulkiness of the structure; limited functionality due to not fully using the heat medium and long cold water. On the basis of the patent study of existing methods of reducing thermal pollution, the developed heat exchanger heated waters of power objects (patent RU № 134621). Designed heat exchanger characterized by enhanced functionality available ways to prevent thermal pollution due to the use of thermal energy of the heated waters of power plants for heating of cold water and correspondingly cooling the heated waters. Practical importance: The proposed by authors technical solution allows utilizing the heat energy of the heated waters of power facilities before discharge into cooling ponds. Thus, the heat exchanger prevents thermal pollution of the reservoir and consequently provides a desired level of water quality for water supply and supplies the consumers with warm water, i. e., contributes to several tasks of housing and communal services.

Study on the Surface Flow Constructed Wetland Wastewater Treatment of Furfural Wastewater

2011 ◽  
Vol 281 ◽  
pp. 233-236
Author(s):  
Ju Wei Peng ◽  
Xiang Kui Han
Keyword(s):  
Waste Water ◽  
Wastewater Treatment ◽  
Constructed Wetland ◽  
Ph Value ◽  
Removal Rate ◽  
Surface Flow ◽  
Treated Wastewater ◽  
Wetland Treatment ◽  
Cod Removal Rate ◽  
Research Show

According to the characteristics of furfural wastewater, by production enterprises located in low-lying saline land transformed into a surface flow constructed wetlands, the waste water in the wetland approach to natural consumption, no efflux, treated waste water equal to the wetland wastewater by natural evaporation, plant transpiration and plant storage Volume. Research show that, after wetland treatment the wastewater COD removal rate to an average of 94%, TN removal rate to an average of 65%, PH value of treated wastewater is 6.22, the use of surface flow constructed wetland wastewater treatment is feasible ecological processing technology for furfural.

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