sewer districts Articles

  • Metropolitan Sewer District (MSD), Cincinnati, Ohio U.S.A.: HTFB System

    The Metropolitan Sewer District (MSD) of Greater Cincinnati, Ohio is a 90 mgd primary treatment, 55 mgd activated sludge treatment plant. Solids processing includes gravity thickening of primary sludge, dissolved air flotation, thickening of secondary sludge, holding tank storage, belt filter press dewatering and pumping of cake to the old outdated multiple hearth ...

  • Los Angeles County WRRF Embraces Codigestion

    Technology to produce food waste slurry key to project implementation - and helps generators comply with California organics recycling mandates. The Sanitation Districts’ JWPCP in Carson (CA) treats an average of 280 million gallons/day of wastewater. One of the two anaerobic digestion tanks above has been used for codigestion, with the second serving as the control. Photos ...


    By BioCycle Magazine

  • Planning for the Unthinkable Risk Assessment and Emergency Response Planning for Catastrophic Events District of Columbia Water and Sewer Authority (DC WASA)

    ABSTRACTManager’s decision capabilities can be improved through a better understanding of a system’s inter-dependability. Communication and planning during non-emergency periods enable managers and engineers to review the impacts that would be expected during several scenarios, and what system improvements could be made to minimize those impacts. The plan that DC WASA developed helped managers ...

  • Protecting Homes from Sewage Backup - Metropolitan Sewer District of Greater Cincinnati’s Water in Basement Prevention Program

    ABSTRACT Many customers of the Metropolitan Sewer District of Greater Cincinnati (MSDGC) have experienced basement backup due to surcharging of the sanitary and combined sewer systems. The surcharging was caused by excessive infiltration and inflow entering the sanitary sewer system and a lack of capacity in the combined sewer system. As part of the Consent Decree that MSDGC signed with the ...

  • Northwest Side Relief Sewer

    Meticulous planning, design and construction management went into devising reliable solutions for this award-winning tunnel project that alleviated persistent flooding and improved the community's water quality. Like many U.S. cities, Milwaukee faced a serious and growing problem. Population growth and urban development had produced ever-increasing volumes of wastewater and stormwater. Aging and ...


    By Black & Veatch Corporation

  • Rehabilitation of a Large Semi-Elliptical Sewer

    ABSTRACTThe Sanitation Districts of Los Angeles County (Districts) own, operate, and maintain a wastewater treatment and collection system that includes approximately 1300 miles of sanitary sewers ranging from 6 to 144 inches in diameter. A portion of the Districts’ Joint Outfall “A” Trunk Sewer was constructed of cast-in-place reinforced concrete having a semi-elliptical cross section and ...

  • Q&A: The world’s eyes turn to Minnesota on district energy

    Frank Jossi reports in Midwest Energy News that for the second time in a little more than a decade St. Paul is hosting an international conference on district energy. Ken Smith is the president and CEO of District Energy St. Paul and past Chair of the International District Energy ...

  • Modeling storage capacity in Amsterdam’s sewer system

    About Waternet Waternet is a joint executive within the Amsterdam City Council and the regional management board Amstel, Gooi en Vecht, undertaking strategy, policy, design, planning, projects and administration for wastewater, groundwater and potable water. The organization controls 12 wastewater treatment plants, 3,500km of stormwater and wastewater pipelines, 500km of pressure pipes, ...


    By Innovyze

  • Innovative modeling approaches improve capacity planning at Orange County sanitation district

    The Orange County Sanitation District (OCSD or District) owns and operates the regional collection system in north and central Orange County, California. The system, which includes over 400 miles of trunk sewers, conveys approximately 250 million gallons of wastewater per day from local sewers within a 471-square-mile service area to two treatment plants. Recently, the District updated the ...

  • Avoiding Sewer Fires with Vapor Space Organics Monitoring

    ABSTRACTRegulation of flammable gases released from wastewater discharges is facilitated by the use of the Vapor Space Organics test method. Such regulation can reduce the risk of a flash sewer fire, resulting damage and potential injury. The updated 2003 VSO process developed by Severn Trent Laboratories produced data that was equivalent to the 1990 VSO process developed and used by the ...

  • Sewer Siphon Assessment and Air Jumper Design

    ABSTRACTIn response to customer complaints about sewer odor, Orange County Sanitation District (OCSD), California launched a project to investigate the ventilation requirements of existing sewer siphons, to verify adequacy of existing air jumper operation, and determine the need for new air jumpers or additional air jumper capacity. The challenge was assessing sewer siphon air jumper adequacy ...

  • Increased Pressure Removes “Pressure” for Regional Sewer Authority

    Founded in 1925, the Western Carolina Regional Sewer Authority (WCRSA) is a special purpose district of South Carolina, located in northwestern South Carolina. The organization serves over 400,000 customers in Greenville County and parts of Anderson, Spartanburg, and Laurens Counties, covering a total of 296 square miles. WCRSA maintains 300 miles of major sewer trunk lines and conducts ...


    By Gorman-Rupp Co.

  • Sewer Line Upsize in Perris, CA - Case Study

    Innovative pipebursting approach successfully upsizes old trunk sewer line to serve a new Southern California subdivision Challenge Burst a 350-foot-long trunk line, replacing 10-inch clay pipe with 14-inch SDR-17 polyethylene pipe. Solution We helped Young Homes close escrow on the 95 homes in its Perris, CA ...


    By TRIC Tools Inc.

  • Watershed characterization and planning to help District meet consent decree case study

    Sanitation District No. 1 of Northern Kentucky has signed the nation’s first wet weather consent decree based on the principles of adaptive watershed management. LimnoTech is working with the District, its gray and green infrastructure consultants, and stakeholders to develop watershed plans that meet requirements of the consent decree for sewer overflows. Problem The ...


    By LimnoTech Inc.

  • Pearl river valley water supply district case study

    Performance History and Discussion In-Pipe Technology implemented the first phase of a collection system Professional Services Program in 2001. Beginning in 2002, additional collection system basins were added to the services program. Currently, the treated areas include the North and South shore of the Pelahatchie Bay, the Main Harbor, and two Lagoon Waste Water Treatment Plant (WWTP) ...

  • Integrating Rural Wastewater Management: Crow Wing County Sanitary Management District

    ABSTRACTDouble-digit population growths and skyrocketing development has resulted in a dramatic increase in unsewered development in Minnesota’s popular lakes county. To help assure protection of human health and the quality of the waters, a county wide decentralized sanitary district with pilot subordinate districts is being established in Crow Wing County. The objective of the district is to ...

  • Feasibility study of Using GVRD sewers as heat sources and sinks

    Executive Summary As pari of the Sustainable Region Initiative (SRI) the Greater Vancouver Regional District (GRVD) Policy and Planning Department has commissioned this study to investigate the use of district sewers as heat sources or heat sinks. This conceptual study examines the technology available for sewer heat transfer, and provides a mathematical and physical model of a heat transfer ...


    By RABTHERM AG

  • Quantifying Sub-Surface Discharges from Individual Sewer Defects

    ABSTRACTThe California Regional Water Quality Control Board, Santa Ana Region (RWQCB) required wastewater collection agencies in Orange County to report discharges from “pipe breaks, leaking sewer pipes and joints, and other subsurface discharges of wastewater.” The Orange County Sanitation District (OCSD), in conjunction with a research team from University of California, Irvine (UCI), developed ...

  • Report to Congress: Combined Sewer Overflows to the Lake Michigan Basin

    The U.S. Environmental Protection Agency (EPA) is transmitting this Report to Congress on combined sewer overflows (CSOs) in the Lake Michigan basin. CSOs can occur in combined sewer systems (CSSs), which are defined as collection systems that carry both wastewater and storm water in the same pipe. A CSO is defined as “the discharge from a CSS at a point prior to the publicly-owned treatment ...

  • Another Sewer from Hell - The City of Richmond, British Columbia, Canada Experience

    ABSTRACTThe City of Richmond has a population of approximately 180,000 and is located on a flood plain at approximately sea level. These physical attributes present numerous challenges with underground utility design, including sanitary sewers. On January 21, 2005 the City declared a local state of emergency near the intersection of No. 3 Road at Cook Road due to the development of a large ...

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you