For roughly forty years, from 1870 to 1910, Americans recognized and feared gases emanating from sewers, believing that they were responsible for causing an array of diseases. Fears of sewer gas arose from deeper anxieties toward contact with decomposing organic matter and the vapors emitted from such refuse. These anxieties were exacerbated by the construction of sewers across the country duri...

This paper presents an overview of causes of sewer deterioration together with a discussion of control methods that can prevent or arrest this deterioration. In particular, the paper covers inlineand combined sewer overflow(CSO) storage-tank-flushing systems for removal of sediments and minimizing hydrogen sulfide production resulting in the reduction of associated pollution and sewerline corro...

Sewer overflows may cause communities to be vulnerable to various health problems and other monetary losses. This puts a lot of burden on responsible to minimize end user complaints. Therefore, crack prediction would be helpful to facilitate decision makers to control sewer overflow problems and prioritize inspection and rehabilitation needs . The accurate prediction of current underground sewe...

The usage of tethered, remotely controlled robot platforms in sewer pipes has become widely accepted. Research and development in engineering have moved the original application field of merely visual inspection to manipulative tasks such as the actual repair of pipe sections, installation of cable, e.g. for communication. Despite all engineering advances in the mechanical design of the platfor...

Abstract In recent years, the number of pipes that have exceeded their service life has increased. For this reason, earthworm-type robots equipped with cameras been developed to perform regularly inspections sewer pipes. However, inspection methods not yet established. This paper proposes a method for anomaly detection from images in using Generative Adversarial Network (GAN). A model combines ...

Wastewater pH affects the transfer of H2S from liquid to gas and hence impacts on the extent of odour and corrosion. Sewage pH may change significantly in sewer networks due to, for example, the fermentation of organic compounds, particularly when the hydraulic retention time is long, the discharge of trade wastes that are organic-rich or with extreme pH, and the intentional addition of alkali ...

CSOnet is a sensor actuator network that monitors and controls the frequency of combined sewer overflow (CSO) events in city sewer systems. CSO events constitute a major health and environmental hazard which numerous U.S. cities have been attempting to address. This paper describes an ongoing project building a metropolitan scale CSOnet in the City of South Bend Indiana.

In 2007, the State of Missouri and the United States Environmental Protection Agency, along with the Missouri Coalition for the Environment, filed a lawsuit against the Metropolitan St. Louis Sewer District (MSD) regarding overflows. In August 2011, the Department of Justice filed a consent decree requiring MSD to spend a minimum $4.7 billion over the next 23 years to address the issue of overf...