sanitary wastewater treatment Articles

  • Application of batch tests to assess antibiotic loads in anaerobic processes

    The presence of antibiotics in drinking water and wastewater has not been widely studied because the sanitary engineering sector mainly focuses on the removal of organic matter and nutrients. There is a lack of environmental regulations for pollutants like antibiotics. Batch tests analyse biodegradability to measure the anaerobic degradation potential of the substrate, or they can be used as ...


    By IWA Publishing

  • Ready or not: The Changing Nature of Collection Systems Oversight

    ABSTRACT The collection and conveyance of sanitary wastewater is a principal tenet of sanitary engineering that has helped move developed countries into the modern urban age. The focus of collection system agencies has historically been to convey wastewater to treatment facilities. The operational practices of these agencies have generally been geared toward infrastructure maintenance and ...

  • Alkaline fermentation of waste activated sludge stimulated by saponin: volatile fatty acid production, mechanisms and pilot-scale application

    Volatile fatty acid (VFA) production stimulated by saponin (SP), an environmentally friendly bio-surfactant, was investigated during sludge alkaline fermentation in laboratory studies and pilot applications. The combined use of SP and pH 9 condition significantly enhanced VFA production to approximately 425 mg COD/g VSS, which was 4.7-fold of raw sludge and 1.5-fold of sole pH 10 adjustment ...


    By IWA Publishing

  • Project: Dumaguete city septage management system - Philippines

    The Septage Management System of the city of Dumaguete consists of the first city-wide septic tank maintenance program in the Republic of the Philippines to be financed by the local government coupled with a low-cost, low-maintenance decentralized wastewater treatment facility.  The project was motivated by an assessment of the city which found there to be 20,000 poorly designed and ...


    By IWA Publishing

  • Spreadsheet Implementation of Activated Sludge Model #1 for Sequencing Batch Reactors

     KEYWORDS Sequencing Batch Reactor, Simulation Modeling, ASM1, Flow Routing BACKGROUND Many small municipal wastewater treatment plants in North America use sequencing batch reactors (SBR) to provide secondary treatment. SBRs are a fill-and-draw variant of the activated sludge process in which a single reactor is used to mix raw ...

  • Manic 5 and Manic 5 PA (Hydro Québec), Quebec case study

    Part of an hydroelectric complex counting four dams, Manic 5 and Manis 5 PA are two power houses installed in the valley of the Manicouagan river, north of Québec. Unveiled in 1970, this plant represents the higher multiple-arch and buttress dam in the world. For the Manic 5 and Manic 5 PA sanitary water treatment, Hydro-Québec mandated the Groupe-conseil TDA to find a compact ...


    By H2O Innovation

  • Challenges for bathing in rivers in terms of compliance with coliform standards. Case study in a large urbanized basin (das Velhas River, Brazil)

    This paper presents a case study on the prospects of bathing in a large water course (das Velhas River, Brazil), which crosses the important metropolitan region of Belo Horizonte (25 municipalities), receiving several point and diffuse discharges. The studies were carried out based on a mathematical simulation of thermotolerant coliforms over 227 km of the river, using an adaptation of the ...


    By IWA Publishing

  • Can wetlands help the restoration effort in the California Desert?

    As shown in Figure 1 the Valley Sanitary District Wastewater Treatment Plant (VSD) is located in the Colorado River Basin Region of Southern California. Effluent from this 8.5 mgd wastewater treatment plant discharges to the Coachella ...


    By LEE & RO, Inc

  • Case Study: Barboursville, the “Best Little Village in the state,” just got better

    Barboursville, which bills itself as the “Best Little Village in the State of West Virginia,” has just completed an impressive upgrade to its wastewater treatment lagoon.  What makes the upgrade impressive?  Try this: Increased capacity of the existing lagoon from 600,000 gpd to 1,500,000 gpd. Had no disruption of treatment during construction. Total project costs of less than ...


    By Environetics, Inc.

  • Planned Biosolids Facility Forms Nucleas for Eco-Complex

    ABSTRACTCatawba County owns and operates the Blackburn Landfill, a sanitary landfill for the disposal of municipal solid waste (MSW). Methane generated within the landfill is collected and utilized to generate electricity which is sold to Duke Power. In the process of combusting methane to generate electricity a significant amount of heat energy is produced, which is not currently utilized. ...

  • Monitoring Flow Rate in a Channel to Minimize Water Pollution

    Recently a wastewater management district in Cleveland contacted CAS DataLoggers to supply an automated monitoring solution for their environmental project. In most cities, sanitary sewers and storm sewers were separate, so that storm water was diverted into a nearby lake. However, Cleveland had only one sewer available, so all of the flow went to the ...


    By CAS DATALOGGERS

  • Integration of a CMOM program, service delivery makeover program, and CMMS at Pasco County Utilities, Florida

    Pasco County, located on the Gulf Coast of central Florida, has experienced rapid growth over the past several years. As a result of the County’s rapid growth, addressing issues such as wastewater treatment facility permitting, ability to meet increasingly stringent regulatory standards, increases in Sanitary Sewer Overflow (SSO) occurrences, operation and maintenance of current and acquired ...

  • Hydraulic hydrodynamic modeling as an effective management tool for large collection systems - the LA story

    There are a many difficult challenges when it comes to managing large and complex wastewater collection systems such as the one the City of Los Angeles owns and operates. The City’s sewer system serves close to 4 million people in about 550 square miles of service area. The network consists of 6,500 miles of sewers varying in size from 8 inches to 150 inches in diameter. Of those sewers ...

  • Inland waters of Ohio cleveland-hopkins airport - case study

    Application Inland Waters of Ohio, a Division of Inland Services, is a part of a 1,100 employee environmental industrial services company. Among the services that Inland provides at airports are the containment, collection, management, recovery and recycling of spent Aircraft Deicing Fluid (SADF). At Cleveland Hopkins Airport, Inland collects spent ADF using ground recovery vehicles, and ...


  • Multifaceted sewer improvements program eliminates sewer connection moratorium and system overflows

    The sewer system serving Borough of Jewett City, Connecticut dates from the late 1800’s and was originally constructed as a combined sewer system with the discharges directed to the area rivers. In the 1970’s, the raw sewage discharges from the Borough system were removed from the rivers and redirected to a newly constructed wastewater treatment facility. However, the overflows from the ...

  • Distance Education: Past, Present, and Future

    ABSTRACTAlternative training technologies are being evaluated with increasing interest in distance education and online training. Evaluations show the benefit of distance education because of limited staffing, shrinking budget dollars for travel to short schools and conferences, and the convenience, availability, and quality of online training selections. In many industries today, distance ...

  • Atlanta upgrades to InfoWorks CS to aid environmental program

    The City of Atlanta, Georgia, in the USA, has purchased InfoWorks CS to help it meet stringent US Environmental Protection Agency (EPA) and Georgia State Environmental Protection Division (EPD) requirements for discharge of its wastewaters to the Chattahoochee River. The Chattahoochee, one of the smallest rivers in the US supplying a metropolitan area, provides 80% of the city’s water needs. ...


    By Innovyze

  • 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 ...

  • HS-200 Lowering company costs and liability

    A major printing company was experiencing difficulties with managing their wastewater treatment system due to a higly concentrated oily water influent. The grab samples performed by the local sanitary district exhibited high levels of BOD, COD and oil and grease levels in the discharge water. The problem was traced back to their compressor condensate discharge. The company has ...


    By Hydrosil International

  • New Energy BFP case study

    Clarification and Dewatering Control Industrial TSS The New Energy Corporation facility in South Bend IN produces 380,000 M3 per year (100 million gallons per year) of ethanol from corn feedstock. It also produces about 272,000 tonnes per year (300,000 tons per year) of carbon dioxide and 299,000 tonnes per year (330,000 tons per year) of distillers' dried grains with solubles (DDGS) ...


    By Komline-Sanderson

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