One of the goals of the APUSS project (assessing infiltration and exfiltration on the performance of urban sewer systems) is to assess sewer exfiltration, in order to support cities and operators to define problem-oriented rehabilitation strategies. In this paper, we review various methods currently used for the estimation of exfiltration and discuss data needs and applicability for rehabilitat...

In this paper, a stochastic finite element method (SFEM) is employed to investigate the probability of failure of cementitious buried sewer pipes subjected to combined effect of corrosion and stresses. A non-linear time-dependant model is used to determine the extent of concrete corrosion. Using the SFEM, the effects of different random variables, including loads, pipe material, and corrosion o...

The slope of sewer pipes is a major factor for transporting sewage at designed flow rates. However, the gradient inside pipe changes locally various reasons after construction. This causes disturbances requiring investigation and appropriate maintenance. study extracted internal elevation fluctuation from closed-circuit television footage, which required sanitary sewers. principle that change i...

Abstract Oil and grease are organic contaminants that detrimental to the environment. The high concentration of oil can cause clogging in sewer. Clogged sewers deteriorate sanitary conditions. Adsorption is one technique reduce wastewater. using natural resources overcome cost commercial activated carbon. Sewage sludge has potential as raw material for carbon because content. studies aim invest...

Distributed temperature sensing (DTS) with fiber-optic cables is a powerful tool to detect illicit connections in storm sewer systems. High-frequency temperature measurements along the in-sewer cable create a detailed representation of temperature anomalies due to illicit discharges. The detection limits of the monitoring equipment itself are well-known, but there is little information availabl...

The sewer inspection robot MAKRO is an autonomous multi-segment robot with worm-like shape driven by wheels. It is currently under development in the project MAKRO-PLUS. The robot has to navigate autonomously within sewer systems. Its first tasks will be to take water probes, analyze it onboard, and measure positions of manholes and pipes to detect polluted-loaded sewage and to improve current ...

Previous evidence has identified potential racial disparities in access to community water and sewer service in peri-urban areas adjacent to North Carolina municipalities. We performed the first quantitative, multi-county analysis of these disparities. Using publicly available data, we identified areas bordering municipalities and lacking community water and/or sewer service in 75 North Carolin...

Introduction An early textbook in hydrology (Mead 1919) contains a remarkable chapter on ground water as well as two chapters on geology. The author, Daniel W. Mead, a professor of hydraulic and sanitary engineering at the University of Wisconsin (now the University of WisconsinMadison), based the text on lecture notes (published earlier, Mead [1904]) for his course in general hydrology. In fac...

corrosion makes huge economic and ecologic damage all over the world. biologic corrosion of sewer pipes is considered as a serious limitation in economic perspectives. to prevent biologic corrosive damage, lining techniques can be applied by materials and aggregate resistant to attack bacterially in sewer pipes. the role of bacteria is that they convert sulfur compounds into sulfuric acid which...