wastewater engineering Articles

  • Five principles of uncertainty for modelers discussed in November-December issue of Groundwater

    If you’re a member of the NGWA Scientists and Engineers Section, you will soon receive your copy of the November-December 2017 of Groundwater®, an issue brimming with a wide range of topics. In his Guest Editorial, Randall J. Hunt offers five principles of uncertainty for groundwater modelers. He argues that uncertainty must ...

  • Wastewater engineers go with the flow

    The efficiency of maintenance work has been improved by water treatment engineers employing Intellisonde monitors in their final effluent. Designed primarily to measure water quality, the Intellisondes also measure flow, and this reading is being used to detect the accumulation of debris that necessitates a maintenance visit. Wastewater treatment efficiency is often measured by the analysis of ...


    By Intellitect Water Ltd

  • Wastewater Solutions: Design Tools for Engineers

    These tool kits originally appear on the Wastewater Solutions for Development site.  Click here to view. All tools are works in progress and presented in Beta Test mode - comments are requested. ...


    By IWA Publishing

  • The construction of an engineered bacterium to remove cadmium from wastewater

    The removal of cadmium (Cd) from wastewater before it is released from factories is important for protecting human health. Although some researchers have developed engineered bacteria, the resistance of these engineered bacteria to Cd have not been improved. In this study, two key genes involved in glutathione synthesis (gshA and gshB), a serine acetyltransferase gene (cysE), a Thlaspi ...


    By IWA Publishing

  • Uncertainty Analysis in Wastewater Engineering Modeling: Understanding the Limitations

    ABSTRACT Design engineers commonly rely on physical and mathematical approximations or models of real complex phenomena. During the development of these physical or mathematical models, simplifications and assumptions need to be made to develop such tools. It is unrealistic to expect that the modeling process will give an answer that is a perfect match to the real case, and it is, therefore, ...

  • Chemical Engineering Magazine: Odor Issues and Solutions for Wastewater Treatment

    Today, there has been a dramatic increase in the number of industrial operations that are located within or near small towns and even large cities. When local residents constantly smell these industrial processes – particularly from wastewater treatment — unhappy neighborhoods are generally the result. In addition, many wastewater facilities can no longer produce odors without facing ...


    By OMI Industries (OMI)

  • Refinery Wastewater

    A refinery was storing wastewater in several tanks and needed to meet the city discharge limits before they were allowed to dispose of the water. The problem was with soluble sulfides (1,000 ppm in the water) as the discharge was 0.5 ppm. Integrated Engineers was contacted to see if they could create a treatment process to reduce the sulfides to discharge limits. Several large water treatment ...


    By Integrated Engineers Inc.

  • A review of the detection, fate and effects of engineered nanomaterials in wastewater treatment plants

    Engineered nanomaterials (ENMs) are increasingly found in a wide range of products and processes, and consequently increasing loads are expected to reach wastewater treatment plants (WWTPs). To better assess the potential risk of ENMs to the environment via input through WWTP effluents, this review considers ENM detection methods, fate in WWTPs and potential effects on biota exposed to ...


    By IWA Publishing

  • The application of surface engineered silica for the treatment of sugar containing wastewater

    The removal of sucrose and fructose from water at various high concentrations by surface engineered silica (SES) was studied using dissolved sugar in pure water. The results indicate that sugar at concentrations of up to 800 g/L can be removed by SES at a relatively high dose of 250 to 300 g/L. Based on these results, process water from a soft drink filling station which was contaminated by ...


    By IWA Publishing

  • An Advanced Engineered Wetlands Process for Treating Wastewaters Containing Recalcitrant Contaminants

     Abstract Constructed wetlands are more economic to build and operate than conventional (mechanical) wastewater treatment systems, and there is an increasing move to consider them. However, although they are widely used in cold climates, winter operability often presents problems, and constructed wetlands normally only remove part of any nutrients (nitrogen and phosphorus compounds) in ...


  • Environmental Engineering case study

    USX Corporation, Fairless Hill, Bucks County Evaluated hydraulics of water distribution system and its capability to meet very high fire flow requirements for Industrial Park. Assisted with presentation and discussion with Falls Township. Upper Makefield Township, The Arbors Reviewed and approved design of water supply ...


    By Mercuri & Associates, Inc.

  • Nanotechnology in Industrial Wastewater Treatment

    Nanotechnology in Industrial Wastewater Treatment is a state of the art reference book. The book is particularly useful for wastewater technology development laboratories and organizations. All professional and academic areas connected with environmental engineering, nanotechnology based wastewater treatment and related product design are incorporated and provide an essentialresource. ...


    By IWA Publishing

  • Wastewater Aeration - Ventura, CA

    Ventura Shopping Center Avoids Litigation by Resolving Sewer Odor Problems Ventura, CA The Problem: A new shopping center in Ventura, CA with several major retail stores, was suffering from a sewer odor problem. Hydrogen sulfide odors flooded the entrances of the stores in the shopping center, causing complaints from customers and employees. The local and corporate divisions of these retailers ...


    By Mazzei Injector Company, LLC

  • Reducing EC-TDS in Wastewater

    Integrated Engineers, Inc. has developed a product that will reduce the EC/TDS addition as compared to the use of acids/caustics for pH adjustment and coagulants in industrial wastewater. The products are our FloccinAgent tm product line, manufactured in Fresno, California. They add far less EC/TDS to waste streams and are usually equal or more cost effective than conventional wastewater ...


    By Integrated Engineers Inc.

  • Wastewater solutions for a hospital in Libya

    Continuing the trend of significant growth in Libya for WPL Ltd and El Zulal, the most recent development has been to provide wastewater treatment solutions for a hospital near Ubari. These facilities were provided as part of a co-operation project between El Zulal and the Libyan Government. El Zulal are the local expert distributors and installers for WPL's wastewater treatment solutions across ...


    By WPL Ltd

  • Restaurant Wastewater Treatment

    Restaurant Wastewater Treatment Grease Trap Wastewater Treatment, Fats, Oils & Grease Easily Removed Wastewater Recycled A grease trap waste hauling operation requested assistance on determining ...


    By Integrated Engineers Inc.

  • Long-term effects of engineered nanoparticles on enzyme activity and functional bacteria in wastewater treatment plants

    The pervasive use of engineered nanoparticles (NPs) in a wide range of fields raises concerns about their potential environmental impacts. Previous studies confirmed that some NPs had already entered wastewater treatment plants (WWTPs). Wastewater nutrient removal depends on the metabolisms of activated sludge bacteria and their related key enzymes. Therefore, this study compared the possible ...


    By IWA Publishing

  • Biologically Engineered Biofilm Modifications for the Enhancement of Collection System Transformations and Impacts on BNR Wastewater Treatment

    ABSTRACTIncreased influent RBCOD and heterotrophic plate counts coincided with the start of bioaugmentation in this study. Observed influent sulfide levels were also lower duringbioaugmentation. RBCOD increases could potentially improve biological phosphorus or nitrogen removal. Lowered sulfides in the influent could lower corrosion and odors in the collection system ...

  • What makes the InfoWorks CS Simulation Engine the best of breed for wastewater and stormwater modelling?

    Untitled Document Modeling software is only as good as its simulation engine. But the engine is the least ...


    By Innovyze

  • The natural way to clean wastewater

    John Todd founded Ocean Arks International in the 1980s, where he started to experiment with processes that mimic natural ways to purify wastewater. He built a greenhouse and ran sewage through a series of tanks, with plants suspended in the flowing waters, and constructed marshes made of sand and gravel. No chemicals were added, but plenty of aquatic creatures from snails to small fish were ...


    By BioCycle Magazine

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