Water Treatment Monitoring Articles

  • Wastewater Treatment Plant Monitors Greenhouse Gas Emissions

    Globally, little attention is paid to gaseous emissions from wastewater treatment processes. This contrasts greatly with the regulatory monitoring that is applied to the quality of water emissions from such facilities. However, in Helsinki, Finland, a large municipal wastewater treatment facility continuously monitors its emissions of greenhouse gases (GHGs) to help in the city’s efforts to ...


    By Gasmet Technologies Oy

  • Fate and behavior of rotenone in Diamond Lake, Oregon following invasive tui chub eradication

    In September 2006, Diamond Lake was treated by the Oregon Department of Fish and Wildlife with a mixture of powdered and liquid rotenone in the successful eradication of invasive tui chub Gila bicolor. During treatment, the lake was in the middle of a phytoplankton (including cyanobacteria Anabaena sp.) bloom, resulting in an elevated pH of 9.7. Dissipation of rotenone and its major metabolite ...


    By John Wiley & Sons, Ltd.

  • Endospore recovery from large volumes using fieldable ultrafiltration for the diagnosis of drinking water treatment plants

    Anaerobic sulfite-reducing and aerobic spore-forming bacteria are used as indicators to verify the reliability of water treatment plant efficiency. The objectives of this study aimed to highlight the more accurate endospore indicator for water treatment monitoring and to select an efficient filtration system in order to detect low amounts of endospores from large volumes. The performance of two ...


    By IWA Publishing

  • Lessons learnt from evaluating full-scale ammonium feedback control in three large wastewater treatment plants

    Three large wastewater treatment plants in Sweden participate in a project evaluating different types of ammonium feedback controllers in full-scale operation. The goal is to improve process monitoring, maintain effluent water quality and save energy. The paper presents the outcome of the long-term evaluation of controllers. Based on the experiences gained from the full-scale implementations, a ...


    By IWA Publishing

  • An inexpensive, temporally‐integrated system for monitoring occurrence and biological effects of aquatic contaminants in the field

    Assessment of potential risks of complex contaminant mixtures in the environment requires integrated chemical and biological approaches. Our laboratory is developing these types of methods for assessing possible risks of aquatic contaminants in near‐shore Great Lakes sites. A component of this involves an exposure system for caged fathead minnow (Pimephales promelas) adults suitable for the ...


    By John Wiley & Sons, Ltd.

  • Household survey of installation and treatment efficiency of point-of-use water treatment systems in Hanoi, Vietnam

    Since urban water supply is not yet available for every inhabitant in Hanoi City, numerous residents look for alternative sources such as groundwater and rainwater to compensate the supply shortage. However, in parts of Hanoi, it was reported that groundwater is polluted by various contaminants including arsenic (As) and ammonia (NH4-N). Therefore, numerous types of point-of-use (POU) water ...


    By IWA Publishing

  • Excel Spreadsheets for Descriptive Statistics of Wastewater Treatment Plant Performance

    I would like to share with you simple Excel spreadsheets that we developed for doing descriptive statistics of wastewater treatment plant performance. They are very simple to use, and the user has only to fill in cells marked in yellow with information and monitoring data (copy from your own spreadsheet and paste as VALUES). The spreadsheets are entirely open (no macros or anything protected), ...


    By IWA Publishing

  • Lamella settlers for storm water treatment – performance and design recommendations

    Three lamella settlers were monitored over a period of 4 years. The main objective was to determine removal efficiencies for total suspended solids and associated pollutants. For this purpose a new sampling method based on large volume solid samplers was developed allowing a detailed analysis of solids. With regard to total suspended solids the average removal efficiency of the plants range from ...


    By IWA Publishing

  • Assessing Upstream Process Changes with ATP Monitoring

    While the Biomass Stress Index (BSI) parameter is most often used to reveal when a biological population has been subjected to toxicity, it can also indicate when an upstream change has relieved a stressful condition. In this month’s featured case study, a pulp & paper wastewater treatment plant made a change to its papermaking process that changed the properties of the wastewater ...


    By LuminUltra Technologies Ltd.

  • Steroid oestrogens in the environment: an Australian perspective

    Endocrine disrupting compounds (EDCs) have been in the scientific spotlight since the 1980s. However, there has been much less research reported in Australia than in other developed countries and little information is known about how these compounds interact with native Australian species compared to European and North American fauna. This is of concern because Australia has distinct wildlife ...


    By IWA Publishing

  • Short-term performance analysis of sludge treatment reed beds

    Sludge treatment reed beds (STRBs) represent an established technology for managing sludge produced by wastewater treatment plants (WWTPs). In this study, an analysis conducted on sludge stratigraphy in a STRB serving the municipal WWTPs of Helsinge (42,000 person equivalent, Denmark) is presented. The STRB has been in operation since 1996. The analysis was conducted for four months including ...


    By IWA Publishing

  • Monitoring and Treatment of Selected Nanoparticles

    With their increasing use, nanoparticles will become concentrated in urban effluents in the future. Both adequate monitoring methods and water treatment technologies will be necessary to assess and avoid consumer exposure. This paper reports results in these two challenging areas for both organic and inorganic nanoparticles. Treatment experiments indicate that lamellar settling is better adapted ...


    By IWA Publishing

  • Management and treatment of landfill leachate by a system of constructed wetlands and ponds in Singapore

    Lorong Halus, Singapore's first landfill leachate treatment system, consists of a pre-treatment system (8,000 m2), five constructed reed beds (38,000 m2), five polishing ponds (13,000 m2), an education centre and a learning trail for visitors. Eight species of wetland plants (total 160,000 plants) were selected for their ability to uptake nutrients, tolerance to low ...


    By IWA Publishing

  • Relating water quality monitoring to disinfection by-product formation in four pilot treatment streams

    With increasing focus on the health implications from disinfection by-products (DBP) in drinking waters, appropriate monitoring parameters are required that can give rapid information on the potential of a treated water to form DBPs. Given that the most effective strategy for the reduction of concentrations of DBPs is the removal of their precursor, natural organic matter, parameters that relate ...


    By IWA Publishing

  • Final effluent monitors protect wastewater treatment efficiency

    Southern Water operates 370 wastewater treatment plants (WWTP), many of which are unmanned for most of the time and most have numeric environmental permits, so a network of online monitors has been established to improve treatment and protect discharge compliance. This has involved the installation of final effluent monitors at over 300 sites in a programme that has lasted for more than ten ...


  • Dynamic soft sensors for detecting factors affecting turbidity in drinking water

    Effective monitoring of water quality is critical for water safety. In particular, online monitoring based on modeling is useful in several applications such as process assessment, hazardous event detection or common fault diagnostics in the water processes. Soft sensors have lately established themselves as a good alternative for different tasks of process control such as the acquisition of ...


    By IWA Publishing

  • Application Focus: Biological Wastewater Treatment

    In knowing the size and health of the active biomass population in a wastewater treatment process, cause-and-effect relationships can then be established with process variables. If a change in the process is beneficial or detrimental to the population, ATP results will indicate to what degree the population is helped or harmed by the change. Since ATP measurements isolate the living population, ...


    By LuminUltra Technologies Ltd.

  • Reliability of on-site greywater treatment systems in Mediterranean and arid environments – a case study

    On-site greywater (GW) treatment and reuse is gaining popularity. However, a main point of concern is that inadequate treatment of such water may lead to negative environmental and health effects. Maintenance of single-family home GW systems is usually performed by home owners with limited professional support. Therefore, unless GW systems are reliable, environmental and public health might be ...


    By IWA Publishing

  • Water Treatment using Wireless I/0

    Rugged Wireless I/O network from Banner Engineering for remote sensing and actuation Banner Engineering offers a rugged, self-contained wireless network that provides reliable configured I/O for remote sensing and actuation. The DX series are designed for process and assembly/manufacturing automation, remote tank level management and waste water treatment installations. Monitoring ...


    By Banner Engineering Corp.

  • Photoelectrocatalytic disinfection of water and wastewater: performance evaluation by qPCR and culture techniques

    Photoelectrocatalytic oxidation (PEC) was evaluated as a disinfection technique using water and secondary treated wastewater spiked with Escherichia coli and Enterococcus faecalis. PEC experiments were carried out using a TiO2/Ti-film anode and a zirconium cathode under simulated solar radiation. Bacterial inactivation was monitored by culture and quantitative ...


    By IWA Publishing

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