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Improving the livestock sector is a priority for the development of agricultural production in the Russian Federation. The development of animal husbandry to a certain extent depends on the use of clean drinking water. The use of contaminated drinking water for animals and birds leads to the accumulation of harmful and toxic substances in meat, milk and eggs. The use of such products by people significantly affects their health, leads to various diseases and shortens life expectancy. To filter water from various impurities, slotted filters are used in livestock complexes that do not provide high-quality water purification. A prototype of a filter for water purification with a central perforated pipe with a productivity of 5 m3/h with an increased service life of the filter bag has been developed. The developed filter provides water purification from high concentration of salts of iron, manganese, chlorine, hardness salts, hydrogen sulfide, pesticides, and also various organic compounds. The purified water is clean and transparent, has a pleasant taste, contains the optimal chemical composition of various impurities, does not contain pathogens and helminth eggs, and therefore meets the high sanitary and hygienic requirements for the safe drinking water for farm animals in the water treatment line of the livestock complex. It can also be used in chemical water treatment units of thermal power plants and other organizations.
Improving the livestock sector is a priority for the development of agricultural production in the Russian Federation. The development of animal husbandry to a certain extent depends on the use of clean drinking water. The use of contaminated drinking water for animals and birds leads to the accumulation of harmful and toxic substances in meat, milk and eggs. The use of such products by people significantly affects their health, leads to various diseases and shortens life expectancy. To filter water from various impurities, slotted filters are used in livestock complexes that do not provide high-quality water purification. A prototype of a filter for water purification with a central perforated pipe with a productivity of 5 m3/h with an increased service life of the filter bag has been developed. The developed filter provides water purification from high concentration of salts of iron, manganese, chlorine, hardness salts, hydrogen sulfide, pesticides, and also various organic compounds. The purified water is clean and transparent, has a pleasant taste, contains the optimal chemical composition of various impurities, does not contain pathogens and helminth eggs, and therefore meets the high sanitary and hygienic requirements for the safe drinking water for farm animals in the water treatment line of the livestock complex. It can also be used in chemical water treatment units of thermal power plants and other organizations.
Introduction. It is widely known that the operation of sewage treatment facilities requires a significant amount of energy, consumed by the pumping equipment, the automated control system, lighting, heating, ventilation, etc. To ensure the reliable operation of pressure sewerage pipelines, it is necessary to analyze the flow parameters and adequately protect these structures from pressure surges (fluid shocks), that demonstrate unique features in the process of wastewater discharge. The proposed method of analyzing principal hydrodynamic parameters in case of a fluid shock takes into account the multi-phase nature of the pressure flow. The hydrodynamic cleaning of water supply and sewerage networks involves special equipment used to clean pipes, having the diameter of over 150 mm which are made of any material. The process of the hydrodynamic cleaning of networks is expensive and laborious. Therefore, the authors of the article propose to prepare a preliminary justification report for such an expensive operation. The purpose of the research is to identify the pipe characteristics, that can justify the application of the hydraulic method for the removal of a layer of internal deposits. Materials and methods. Dependencies, derived by the authors for the purpose of the hydraulic analysis of gravity drainage networks, are used in the article. Results. Dependence between the actual pipe filling and the thickness of the sediment layer in the pipe gully was confirmed. A specific example is provided by the authors to confirm the existence of such a dependence. The graph shows dependence between the actual pipe filling level and the thickness of the sediment layer in the gully and dependence between the value of the hydraulic slope and the thickness of the actual sediment layer. Conclusions. It is shown that the hydrodynamic cleaning of pipes, having a gully sediment layer exceeding 70 mm, is justified for the case analyzed in the article.
Introduction. The practical operation of water supply networks, made of steel and gray cast iron, has proven that deposits accumulate on the inner surface of pipes under certain conditions. Deposition depends on the quality of transported water and the water flow regime, same as in gravity sewerage networks. A sediment layer accumulates in the flume of pipes if the actual flow rate is smaller than the minimum standard one. A layer of deposits in metal water pipes changes the value of the actual inner diameter of pipes and rises the pressure loss due to resistance along the pipeline length, which contributes to an increase in the energy consumption by the pumping equipment and affects the pressure value at the end point of a network. A layer of sediment in the flume of a gravity drainage network also rises losses along its length, slows down the flow rate and may block the water flow in the network. The purpose of the study is to find dependence between the remaining service life of water supply and sewerage networks, having internal deposits, and the thickness of the layer of deposits on pipe walls. Materials and methods. The authors use the dependences, that they have already derived for the hydraulic analysis of metal water supply networks and gravity sewerage networks, having internal deposits. Results. The authors have identified dependence between the remaining service life of water supply pipelines and sewerage systems and the thickness of deposits on the inner walls of pipes. Examples, confirming such a relationship, are provided. They are substantiated by graphs showing dependence between the remaining service life and the thickness of the layer of deposits in pipelines. A hydraulic criterion is proposed for projecting the term of operation of water supply and sewerage networks with internal deposits. Conclusions. The authors have proven the need to use special tables to analyze the characteristics of pipes within the framework of a hydraulic analysis of water supply and sewerage networks, having internal deposits.
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