Sewer Processes

Author: Thorkild Hvitved-Jacobsen
Publisher: CRC Press
ISBN: 1439881774
Format: PDF, ePub
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Since the first edition was published over a decade ago, advancements have been made in the design, operation, and maintenance of sewer systems, and new problems have emerged. For example, sewer processes are now integrated in computer models, and simultaneously, odor and corrosion problems caused by hydrogen sulfide and other volatile organic compounds, as well as other potential health issues, have caused environmental concerns to rise. Reflecting the most current developments, Sewer Processes: Microbial and Chemical Process Engineering of Sewer Networks, Second Edition, offers the reader updated and valuable information on the sewer as a chemical and biological reactor. It focuses on how to predict critical impacts and control adverse effects. It also provides an integrated description of sewer processes in modeling terms. This second edition is full of illustrative examples and figures, includes revisions of chapters from the previous edition, adds three new chapters, and presents extensive study questions. Presents new modeling tools for the design and operation of sewer networks Establishes sewer processes as a key element in preserving water quality Includes greatly expanded coverage of odor formation and prediction Details the WATS sewer process model Highlights the importance of aerobic, anoxic, and anaerobic processes Sewer Processes: Microbial and Chemical Process Engineering of Sewer Networks, Second Edition, provides a basis for up-to-date understanding and modeling of sewer microbial and chemical processes and demonstrates how this knowledge can be applied for the design, operation, and the maintenance of wastewater collection systems. The authors add chemical and microbial dimensions to the design and management of sewer networks with an overall aim of improved sustainability for the system itself and the surrounding environment.

Sewer Networks and Processes within Urban Water Systems

Author: Jean-Luc Bertrand-Krajewski
Publisher: IWA Publishing
ISBN: 1843395061
Format: PDF, ePub, Mobi
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The papers in this volume were originally presented at the 18th European Junior Scientists Workshop (EJSW), Portugal, on 8-11 November 2003 and at the 1st Asian Junior Scientists Workshop (AJSW), Malaysia, on 7-10 February 2004. The workshops were organised by the SS&PWG (Sewer Systems and Processes Working Group) of the IWA/IAHR Joint Committee on Urban Drainage. The two separate workshops were convened under the general themes of "Sewer Processes, Networks and Urban Drainage" and specific topics covered included integrated modelling of urban water systems; modelling of pollutant loads; calibration of models; bed-load transport; sewer pipe roughness; advection in sewers; anoxic processes; infiltration and exfiltration; runoff source control; pollutant loads; ventilation and oxygen uptake. From the 37 full papers presented at the two workshops, 16 papers have been selected by independent reviewers from the SS&PWG for publication in Sewer Networks and Processes within Urban Water Systems. They reflect rather well the variety of topics presented during both workshops, and bring the high-quality work of these junior authors to the wider audience it merits.

Urban and Highway Stormwater Pollution

Author: Thorkild Hvitved-Jacobsen
Publisher: CRC Press
ISBN: 1439826862
Format: PDF
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As the world population grows, already burgeoning cities are becoming taxed in every conceivable way. One topic that receives few headlines, but significantly impacts an area’s quality of health and economic development is the challenge to maintain sustainable urban drainage (SUD). Poor drainage can hamper transportation, add to problems of pollution, and compromise essential clean water resources. While a number of references concentrate on the hydrology, hydraulics, and transport phenomena relevant for urban drainage, we must recognize that any solution requires a more comprehensive consideration of the problem. Urban and Highway Stormwater Pollution: Concepts and Engineering offers a comprehensive text on wet weather pollution originating from urban drainage and road runoff. Bringing together the empirical and theoretical approaches needed to mitigate the problem, this volume: Provides a basic understanding of sources, pathways, and impacts of pollutants associated with wet weather hydrologic cycles occurring in areas with impervious or semi-impervious surfaces Examines wet weather pollutant discharges into streams, lakes, and coastal waters, as well as soil systems Details tools to quantify physical, chemical, and biological characteristics associated with wet weather pollution and methodologies for pollution abatement, control, and monitoring runoff Offers general methodologies and site-specific approaches to deal with stormwater runoff, road runoff, and sewer overflows Supplies reliable predictive tools and modeling methods SUD is rapidly becoming a problem of crisis proportions; but while we must act quickly, any solution must be based on sound principles, accurate data, and proven methods. Written by top researchers with years of experience, this book offers those working at the front line with an accessible resource that helps ameliorate problem situations and prevent others from developing.

N2O and CH4 Emission from Wastewater Collection and Treatment Systems

Author: Jeff Foley
Publisher: IWA Publishing
ISBN: 1780407335
Format: PDF, Mobi
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In a world where there is a growing awareness of the possible effects of human activities on climate change, there is a need to identify the emission of greenhouse gases (GHG) from wastewater treatment plants (WWTPs). As a result of this growing awareness, governments started to implement regulations that require water authorities to report their GHG emissions. With these developments there exists a strong need for adequate insight into the emissions of N2O and CH4. With this insight water authorities would be able to estimate and finally reduce their emissions. The overall objectives of the different research programs performed by partners of the GWRC members WERF (United States of America), WSAA (Australia), CIRSEE-Suez (France) and STOWA (the Netherlands) were: To define the origin of N2O emission. To understand the formation processes of N2O. To identify the level of CH4 emissions from wastewater collection and treatment systems. To evaluate the use of generic emission factors to estimate the emission of N2O from individual plants

Sprayed Concrete Lined Tunnels

Author: Alun Thomas
Publisher: CRC Press
ISBN: 9780415365468
Format: PDF, ePub, Docs
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Practising engineers on site, in the design office or in client organizations will find this book an excellent introduction to the design and construction of sprayed concrete lined (SCL) tunnels. The complex behaviour of the early age behaviour of the sprayed concrete requires careful management. This book covers all aspects of SCL tunnelling – from the constituents of sprayed concrete to detailed design and management during construction. Although there is a close interdependence between all the facets of sprayed concrete, few engineers have the right breadth of experience and expertise, and this urgently needs to be transferred to the wider engineering community. Disseminating essential information for tunnelling engineers, Sprayed Concrete Lined Tunnels is key reading for all involved in or studying the process.

Sewer Processes and Networks

Author: Jean-Luc Bertrand-Krajewski
Publisher: IWA Publishing
ISBN: 9781843394365
Format: PDF, Docs
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Wastewater, biofilms and sediments in sewers are subject to important physical, chemical and microbial changes and interactions affecting not only the sewer itself but also the subsequent wastewater treatment and receiving waters via combined sewer overflows or separate sewer outfalls. This was a motivating theme behind two previous conferences (published in Water Science and Technology) on ?The sewer as a physical, chemical and biological reactor?. This third conference, building on its predecessors, aimed to bring together scientists and practising engineers in the area of environmental process engineering and management of sewer systems to present their results and discuss physical, chemical and biological processes in sewers, and related structural aspects of sewer systems. Key topics covered included: interactions between sewers and the urban wastewater system including wastewater treatment, combined sewer overflows and receiving waters; characterisation, processes and physical interactions of sewer biofilm, sediments, wastewater and air; microbial and chemical processes; solutes and sediments transport including sedimentation and erosion; sulphide formation, corrosion and odour problems; bacteriology; specific pollutants; design, operation and control related to sewer processes; and interactions between sewer structure and processes. From the 45 available papers, 22 have been selected, reviewed and revised for publication in this issue, which reflects the most important aspects of the conference. Together they are a major step towards a more comprehensive and multidisciplinary understanding of sewer behaviour and functioning, of prime importance for the design, operation and upgrading of urban sewer and wastewater systems.