discharge measurement tracer system Articles

  • New simple methodology to estimate degree of dilution in CSO discharges from sewer systems

    INTRODUCTION Performance measures relating to combined sewer overflow (CSO) operation are widely known to have limitations. In the UK they have evolved from simplistic settings based on six times dry weather flow, to Formula A (Government, 1970) and eventually to more complex consent conditions of spill volumes, spill frequency and water quality. Performance measures related to the quality of ...


    By Innovyze

  • 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 ...

  • Residence time distribution in large industrial flotation cells

    The radioactive tracer technique was used to measure the Residence Time Distribution (RTD) of the liquid and solid in a rougher flotation bank consisting of seven cells of a volume of 130 m³. Thus, a pneumatic system of high reliability was used in order to introduce a small amount of radioactive tracer (around 100 mL of liquid or pulp) at the feed pulp entrance. Then, the time response of the ...


    By Inderscience Publishers

  • Automatic reactor model synthesis with genetic programming

    Successful modeling of wastewater treatment plant (WWTP) processes requires an accurate description of the plant hydraulics. Common methods such as tracer experiments are difficult and costly and thus have limited applicability in practice; engineers are often forced to rely on their experience only. An implementation of grammar-based genetic programming with an encoding to represent hydraulic ...


    By IWA Publishing

  • Why does the market need a new Phosgene indicator badge?

    Usage of Phosgene Phosgene (COCl2) is a non combustible but very toxic gas. It is a raw material for plastics like Polycarbonates (i. e. Macrolon) or Polyurethanes. Monitoring of Phosgene Plants using or manufacturing Phosgene of course underlay strict safety regulations. Therefore they are equipped with portable and fixed gas detectors for Phosgene. While ...

  • Properties and Behavior of Inorganics in Contaminated Soil

    Often, specific technologies may be ruled out, or the list of potential technologies may be immediately narrowed, on the basis of the presence or absence of one or more of the chemical groups. The relative amounts of each may tend to favor certain technologies. Metals may be found in the elemental form, but more often they are found as salts mixed in the soil. At the present time, treatment ...

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