water regulation Articles

  • Monitoring hydrocarbons in Bilge water - Case study

    The Situation Various processes onboard ships, such as machinery wash-down, maintenance, and leakage, generate oily wastewater. This contaminated water flow collects in the bilge of the ship. Marine diesel, lubricating oils, grease, as well as other contaminants may be present in bilge water. The bilge water is discharged overboard, with oil and grease concentrations in the discharged ...

  • Control Algae and Improve the Water Quality in Waste Stabilization Ponds

    Due to population growth, accelerated urbanisation and economic development, the quantity of waste water generated is increasing globally. Mainly in low-income areas, a large proportion of the waste water is discharged directly in the environment. When the waste water is treated, the treatment plants may not remove certain pollutants that can have a negative impact on the people and ecosystem. ...


    By LG Sonic

  • 4700 Sampler Industrial Park Wastewater Monitoring - InfraServ Knapsack, Germany - Case Study

    The Model 4700 Automatic Refrigerated Sampler from Teledyne Isco, Inc. is used for water quality monitoring at an industrial park operated by InfraServ Knapsack, Germany InfraServ Knapsack InfraServ GmbH & Co. Knapsack KG is the company that operates the Chemical Industrial Park Knapsack. The site is situated in Huerth, south of Cologne in Germany. The park is divided into ...


    By Teledyne Isco

  • Wastewater and groundwater

    Nearly 25 percent of the population in the United States—in more than 25 million homes—disposes of wastewater through onsite, or unsewered, systems that return treated effluent to the ground. This is an important public health issue because many of those same homes use wells that rely on groundwater for the drinking water supply. With ...

  • 99% of Interceptor contamination remediated - Case study

    What is an Interceptor Tank? An interceptor tank is a trap used to filter out hydrocarbon pollutants from rainwater runoff. It is typically used in road construction and on petrol station forecourts to prevent fuel contamination of the water table via runoff. Petrol interceptors work on the premise that some hydrocarbons such as petrol and diesel float on the ...


    By Slick Solutions

  • How a Specialized Automatic Control Valve Solved Flooding

    The Colombian area of Antioquia creates much of its clean power from hydropower plants along the Guadalupe River. The Guadalupe IV hydroelectric plant generates power with three vertical axis turbines that discharge water below the river level. To prevent flooding, however, the plant needed a solution that ensured the ejector ...


    By Singer Valve Inc.

  • Regulation of water service and efficient use of water

    This report highlights the need for policies targeted to sustainable use of water, which, at the same time, affect water service providers and the environment. Experience from several European countries can help us to identify efficient regulation mechanisms and the effect they could have on the Italian water sector. Some elements of United Kingdom regulation and some of the energy regulation in ...


    By IWA Publishing

  • Uncertainty in UK water regulation could hinder investment

    The stability and predictability of water company regulation in the UK by the Water Services Regulation Authority ("Ofwat"), which is mandated to ensure value for the end consumer, has been a major contributor to attracting private investment into the sector. Since privatisation in 1989, this stable regulatory framework has enabled sector companies to attract over £108 billion of ...


    By IWA Publishing

  • Frequency pressure regulation in water supply systems

    In water supply systems, pressure management in most cases is proven to be the most cost-effective activity related to water loss control. As an advanced method of pressure control, it is possible to use variable frequency drives for centrifugal pump control. Pressure regulation can be performed with constant pressure or with proportional pressure control. The application of proportional ...


    By IWA Publishing

  • A look at some contaminants regulated in drinking water

    The U.S. Environmental Protection Agency regulates just over 90 contaminants in public drinking water systems. They include manmade chemicals as well as naturally occurring contaminants from rocks and soil. A look at some of the contaminants that fall under federal or state regulations: ARSENIC: Enters drinking water through eroding natural deposits in the ground or mining and other ...


    By Associated Press

  • Reducing the Economic Friction of Regulation

    Last month, we looked at two distinctly different bioenergy business models that are merging. Energy profit centers and waste cost-recovery facilities are learning the benefits of each other's business model. The resulting projects generate maximum revenue with lower production costs. The same kind of business model duality occurs in biomass energy regulation. There are more than two kinds of ...


    By BioCycle Magazine

  • EPA Clean Water Act: New Regulations re: `Waters of the United States`

    The Environmental Protection Agency (EPA) published a final rule defining the scope of waters protected under the Clean Water Act… The rule will ensure protection for the nation’s public health and aquatic resources, and increase CWA program predictability and consistency by clarifying the scope of ‘‘waters of the United States’’ protected under the ...

  • Gray Water Characteristics and Implications on Regulations for Sustainable Water Reuse

    Different types of gray water in terms of origin (from bathing, kitchen and laundry activities) and in terms of type of source (medium and low-income residential housing and a hotel) have been studied in Gaborone, Botswana during 2004, with respect to BOD5, TSS, TP, pH, fecal coliforms and conductivity. Results show an expected high variability. No statistically significant difference was ...


    By IWA Publishing

  • Decoupling dependence on natural water: reflexivity in the regulation and allocation of water in Israel

    Since 1999, Israel has secured a decoupling between the total water supplied and water derived from the natural environment through surface and groundwater. Between 2007 and 2010, this decoupling enabled a cut of over 20% in natural water use, while maintaining overall supply volumes despite drought. By 2009–2010, natural water supply had been reduced to the levels of the early ...


    By IWA Publishing

  • Opinion: Environmental regulation in the 21st century

    INTRODUCTION I start with a statement of the obvious. The aim of environmental regulation is to produce measurable improvements in the environment. But how much environmental regulation expresses the desired environmental outcome? How much, on the other hand, sets out the regulatory process? Not enough of the former, too much of the latter. That unremarkable statement of aim is at the ...


  • Maximizing the accuracy of field‐derived numeric nutrient criteria in water quality regulations

    High levels of the nutrients nitrogen and phosphorus can cause unhealthy biological or ecological conditions in surface waters, and prevent the attainment of their designated uses. Regulatory agencies are developing numeric criteria for these nutrients in an effort to ensure that the surface waters in their jurisdictions remain healthy and productive, and that water quality standards are met. ...


    By John Wiley & Sons, Ltd.

  • The customer forum – putting customers at the centre of regulating water services

    This article will explore recent initiatives in customer engagement in water services in Scotland, UK. Scotland has a well-established and successful model for water services regulation and governance, with a public supplier performing as efficiently as the top quartile of private English companies. One recent innovation has been a form of negotiated settlement between the provider and a group ...


    By IWA Publishing

  • Consumer-inclusive economic regulation: water pricing under different regulatory regimes

    This paper investigates whether and how different regulatory regimes for water pricing incorporate mechanisms for consumer inclusion. A literature review suggests that the more separation between policymaking and economic regulation, the higher the incorporation of regulatory governance principles such as transparency, accountability and participation. Our comparative case studies of the system ...


    By IWA Publishing

  • Water-level regulation for freshwater management of Bosten Lake in Xinjiang, China

    The Bosten Lake is the largest inland freshwater lake of China, in which water level and salinity fluctuate due to the imbalance between inflows and outflows under climate change and anthropogenic activities. This paper employed system dynamics as an effective methodology to grasp the regulation rules for sustainable freshwater management of the Bosten Lake. Results show the following. (1) ...


    By IWA Publishing

  • Can regulation improve the performance of government-controlled water utilities?

    This paper provides evidence on whether regulation can improve the performance of government-controlled water utilities. While other studies have examined whether private participation combined with regulation can improve the performance of government-controlled water utilities, there has been little research on whether regulation alone can improve performance.This paper examines five case ...


    By IWA Publishing

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