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Showing 1 to 14 of 14 for “"Sewer pipes"”.
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Acoustic monitoring of hydraulic resistance in partially full pipes.
Hydraulic losses in sewer pipes are caused by wall roughness, blockages and in-pipe sedimentation. Hydraulic resistance is a key parameter that is used to account for the hydraulic energy losses and predict the sewer system propensity to flood. Unfortunately, there are no objective methods to …
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Acid resistance of sewer pipe concrete
… of concrete used in the manufacture of pipes to sulphuric acid environments encountered in sewers. A hydrochloric acid solution (pH of 1,00) simulates the attack on concrete sewer pipes at the average daily sewage level region and in severely corrosive sulphuric acid environments (pH of …
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Aging model for commercial polymers
… and are currently used in trenchless relining of sewer pipes. The analysis uses the effective-time theory and time-temperature superposition (TTSP) methods proposed by Struik, as well as variations of these methods, as proposed by Chai and McCrum, Guerdoux et al. and others. The creep data …
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IMPACTS OF DIURNALLY EXPOSED SLIME LAYER HYDROGEN SULFIDE CONCENTRATIONS IN SEWER ATMOSPHERE
… through odor issues and is a safety concern for sewer workers. Relatively recent development and introduction of H2S data loggers has shown that H2S concentrations in the sewer headspace demonstrate a diurnal pattern that is not explained by current models. Odor complaints and toxicity are …
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Modelling the Viability of Heat Recovery from Underground Pipes. Deterministic modelling of wastewater temperatures in a 3000 sewer pipe network
… temperature variations in a network of 3048 sewer pipes was achieved in this project. Recovering heat from sewers presents attractive options for producing clean energy. However, heat recovery from sewerage may result in wastewater temperature drops which may reduce the influent temperature …
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Polymer impregnation of concrete as a means of improving corrosion resistance
… particularly relevant for the case of concrete sewer pipes, the useful life of which is critically limited by corrosion due primarily, and ultimately, to sulphide attack. Sulphides are formed from the sewage sulphates, by bacteria in the slime layers on the walls of the pipe. These diffuse, …
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Development of acoustic sensor and signal processing technique.
Sewer flooding incidents in the UK are being increasingly associated with the presence of blockages. Blockages are difficult to deal with as although there are locations where they are more likely to occur, they do occur intermittently. In order to manage sewer blockage pro-actively sewer managers …
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Aerosolization of Ebola Virus Surrogates in Wastewater Systems
… basin, and a lab-scale model of converging sewer pipes. We measured the aerosol size distribution generated by each system, spiked Ebola virus surrogates into each system, and determined the emission rate of viruses into the air. While the number of aerosols released ranged from 105 to 107 …
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The flow of water in pipe sewers
Made available in DSpace on 2017-11-30T22:46:23Z (GMT). No. of bitstreams: 2 5959305.pdf: 4898044 bytes, checksum: 3775712071969e25d52824fed3bc51ad (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1899
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Optimal sensor placement for sewer capacity risk management
… of untreated sewage that escapes combined sewer pipes each year (US EPA 2004a) and the estimated 40,000 sanitary sewer overflows and 400,000 backups of untreated sewage into basements (US EPA 2001). Failures in wastewater collection systems can be prevented if they can be detected in time …
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Hydraulic efficiency of grate and curb inlets for urban storm drainage
… comprised of streets, gutters, inlets, storm sewer pipes, and treatment facilities. Objectives of this research program included evaluating the hydraulic efficiency of three storm-drain inlet types and developing design methodology. Denver Type 13 and 16 grate inlets and Colorado Department of …
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Application of radio-frequency identification (RFID) sensors for smart- monitoring applications in sewer systems
Foul sewer and storm drainage systems are buried assets that play important roles in the prevention of diseases and the reduction of health risks for our societies. Sewer blockages and inflow/infiltration (I/I) issues in sewer systems are some of the challenges faced by water authorities. Due to …
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Composition and microstructure of concrete mixtures subjected to biogenic acid corrosion and their role in corrosion prediction of concrete outfall sewers
… and treatment facilities, which include outfall sewers, manholes, and treatment works, are among the key constituents of a country's infrastructure. Most of these facilities are made of concrete due to its low production costs, versatility, inherent strength and durability under most conditions. …
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Improved dynamics modelling for drainage sediment prediction and management
… focussing on sediment processes in sewer pipes and sediment traps. The data collected included, suspended and near bed transport rates, long-term sediment bed development and sediment trap filling patterns. These data and previous data sets were then used in the development of …