wastewater utility Articles

  • A primer on energy efficiency for municipal water and wastewater utilities

    This primer is concerned with energy use and efficiency of network-based water supply and wastewater treatment in urban areas. It focuses on the supply side of the municipal water cycle, including the extraction, treatment, and distribution of water, and collection and treatment of wastewater-activities which are directly managed by Water and Wastewater Utilities (WWUs). The main challenges to ...


    By IWA Publishing

  • How big is the distributed energy opportunity for water and wastewater utilities?

    Energy costs for water utilities are large, and growing Energy is a significant cost for many water utilities, and costs are growing as more energy-intensive forms of water supply, including desalination, are being used. Energy is typically the second-largest utility budget item in developed countries, after labour. In many developing countries, energy can account for 70% or even more, of ...

  • Emergency Vs. Maintenance Repairs for Utilities.

    With populations rising throughout towns and cities in the United States there is a growing need to improve the nation’s water and wastewater infrastructures. Reliable water provisions are needed for continued development and sustenance. At the same time, it is necessary to properly discharge wastewater clinically and efficiently. Much of the inadequacies with water and wastewater assets ...


    By EnTech Engineering Company

  • The performance of water utilities in Jordan

    This paper aims to measure the relative performance of Jordan's water utilities for water sector (WS) and wastewater sector (WWS), and to investigate the major factors behind their inefficiencies. DEA (non-parametric method) and Tobit model (parametric method) were used at two stages. At the first stage DEA was used to evaluate the utilities' efficiency and to investigate the utilities' scale ...


    By IWA Publishing

  • Rehabilitation of the BNR Facilities at the Greenville Utilities Commision Wastewater Treament Plant

    ABSTRACTThe Greenville Utilities Commission Wastewater Treatment Plant (GUC WWTP) is a 17.5 mgd treatment plant designed to meet effluent total nitrogen and total phosphorus limits of 6.0 mg/L and 2.0 mg/L, respectively, through biological nutrient removal. The treatment plant is divided into two separate activated sludge systems; the north and south plants. The treatment plant has consistently ...

  • The Missing Piece: Utilizing evaporation technology to dewater RO reject wastewater

    Reverse Osmosis reject often has high salinity making it prohibitive for discharge to the local sewer facility and expensive to have hauled away. The white paper discusses the advantages of evaporation in general, as well as the differences between Thermal Evaporators and Mechanical Vapor Compression (MVC) Evaporators. Also discussed are the technical details of RO reject water chemistry as ...


    By ENCON Evaporators

  • DCWASA’s certifiable, utility-wide GHG inventory

    ABSTRACT In response to increased emphasis on sustainability and the reduction of carbon/greenhouse gas (GHG) emissions, The District of Columbia Water and Sewer Authority (DCWASA) and its program managers have developed comparisons of options intended to lower the AWTP’s GHG inventory (also called “carbon footprint”). These comparisons have used different assumptions as tothe carbon density of ...


    By Cambi Group AS

  • Utilization rates, water demand and wastewater characteristics of a shared sanitation facility in North Namibia

    Shared sanitation facilities are often the only feasible option for sanitation provision in informal settlements. When implementing infrastructure for wastewater collection and treatment, information regarding quantities and constituent loadings is required. Up to now, such data are not available for shared sanitation. In order to provide this information, this study focuses on wastewater ...


    By IWA Publishing

  • The dissolution characteristics of calcium sulfide and utilization as a precipitation agent in acidic wastewater effluent treatment

    The dissolution characteristics of CaS in the presence of CO2 has been investigated by monitoring sulfide speciation, solution conductivity and pH during dissolution. The sulfide speciation associated with CaS dissolution was utilized for metal precipitation from acidic wastewater effluents. The mechanism involved in the dissolution process was observed to be pH-dependent, characterized by ...


    By IWA Publishing

  • The Use of Water Quality and Process Models for Minimizing Wastewater Utility Greenhouse Gas Footprints

    The Use of Water Quality and Process Models for Minimizing Wastewater Utility Greenhouse Gas Footprints provides an understanding of the processes that are responsible for the major contributions to GHG emissions from WWTP and sewer systems (e.g. heterotrophic denitrification, autotrophic nitrification, autotrophic denitrification, methanogenesis). This knowledge is translated into mathematical ...


    By IWA Publishing

  • Creating a national benchmarking system for the utilities of water supply and wastewater sector in Russia

    Despite the vast resources of drinking water, Russia today is facing some serious problems in the water supply industry. The authors believe that creating a nation-wide benchmarking for Russia's water industry will play an important role in the development process for efficiently functioning water utilities. The main objective is to make improvements in quality of the services provided to ...


    By IWA Publishing

  • Protective coatings for underground utility concrete structures

    As our cities and municipalities grow older, the utility and wastewater infrastructure and corrosion preventive program for underground asset protection are aging with them. Municipalities and Utility Companies are struggling to handle rehabilitation measures and effective corrosion prevention programs to deal with prolonging the life of their buried assets. More municipalities are in the process ...


    By Sauereisen Inc.

  • The principles of aeration and mixing utilizing process aerator technology

    Aeration and mixing are necessary elements for aerobic biological wastewater treatment processes to maintain a healthy, stabilized biological population and thus, insure optimal treatment of the wastewater assuming there is adequate contact time and substrate available. In the design of wastewater treatment plants, aeration typically involves supply of both oxygen and mixing. Aeration is a large ...

  • Case Study: Georgia wastewater utility credits Ecosorb for significant reduction in odor complaints

    The Douglasville-Douglas County Water and Sewer Authority (WSA) has been delivering quality water and wastewater service to more than 90,000 Douglas County residents for over 17 years. WSA's slogan "Award-Winning Service For Our Local Community," proves to be much more than just advertising jargon. Over the past 17 years, their honors have included three citations from the U.S. Environmental ...


    By OMI Industries (OMI)

  • Internal audit, certification and maturity assessment based on ISO55001 in Sendai wastewater utility, Japan

    Sendai Wastewater Utility acquired the first certification of ISO55001 in Japan at March 2014. ISO55001 is the international standard for asset management systems and was published in January 2014. During the process towards certification, the maturity assessment, internal audit and certification exam based on ISO55001 were all executed. It was possible, therefore, to compare the three ...


    By IWA Publishing

  • Benchmarking in the wastewater sector - taking stock

    In order to analyse the success of benchmarking undertaken by utilities in the German water sector, an investigation was carried out in the wastewater sector and how benchmarking affected the efficiency of the processes that the utilities carry out. An expanded reprint of a two part paper describe the findings of a survey that aimed at highlighting the aims, effects and success factors of ...


    By IWA Publishing

  • Wastewater Treatment Plant

    Water is basic to life. It is a precious resource and has become precious commodity now. On going Industrialization, population & urbanization pose pressure on water availability. Utility value of world’s freshwater resources like lakes and rivers are diminishing rapidly due to over exploitation & pollution. Groundwater, an alternative to surface water is also a natural ...


    By Sugam Paryavaran Vikalp

  • United Utilities, Davyhulme WWTW, CHP Plant - Case Study

    At the Davyhulme wastewater treatment works (WWTW) in Greater Manchester, United Utilities is generating renewable energy from sewage gas that is created from sludge left behind after the treatment of wastewater. The produced energy is used to power the local plant and provide high levels of efficiency through ...


    By Clarke Energy

  • Charlotte-Mecklenburg Utilities` Virtual Managed Competition Using Benchmarking

    ABSTRACTThe City of Charlotte, North Carolina’s Managed Competition Program is a City initiative that seeks the best service at the lowest cost through a competition between City forces and the private sector. The program reaches into many facets of City services delivery such as solid waste collections, fleet and street maintenance, and water and wastewater utility services. The units providing ...

  • Wastewater Treatment Process

    The wastewater treatment process is complex and critical to civilization. In simplest terms, wastewater is water that has been mixed with waste matter. Wastewater can be classified as domestic, municipal, or industrial based upon the source of generation. For instance, domestic wastewater comes from everyday liquid waste, including water used to flush the toilet, to shower, or to wash dishes. ...


    By Brentwood Industries, Inc.

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