waterworks Articles

  • Waterworks Essbio, Chile

    For the waterworks in Essbio, Chile, Grundfos Alldos developed a decentralized, computer aided disinfection system networked with the entire system of the La Mochita waterworks. The 600.000 inhabitants of Concepción are supplied with treated water from a river. The water is decontaminated with chlorine gas for economical reasons and for better handling. Exact dosing minimizes the consumption. The ...


  • Plant for the Istanbul waterworks

    Shock chlorination for a water quantity of 55,000 m³/h! This is the result of a large project carried out by Grundfos Alldos for the city of Istanbul together with Durko as the local representative.The background: the municipal waterworks of the Turkish metropolis draw their raw water from a local lake. The water is routed from there to the various waterworks for treatment.To enable problem-free ...


  • Waterworks city of Toulouse

    Two chlorine dioxide plants with very high capacities are in operation in order to supply the city of Toulouse with drinking water. Absolute safety in distribution of the decontaminated water to the households is required. During pre-chlorination and during post-chlorination of the water, the second system is in stand-by operation and is automatically switched on at a possible failure. The ...


  • Dual-media filters, Fredrikstad waterworks, Norway

    Fredrikstad Waterworks in southeastern Norway has an annual water production of 15 mill. cubic metres and supplies the municipalities Fredrikstad and Hvaler. During autumn 2003 they have renovated their dual-media filters. After around 8 years of operation, the volume of filter media in the existing sand/anthracite-filters was significantly reduced resulting in poor filtering ...

  • Characteristics of natural organic matter and formation of chlorination by-products at Masaka waterworks

    To minimise the formation of chlorination by-products (CBPs) it is imperative that attention is directed towards the structure and occurrence of natural organic matter (NOM) in raw water sources, and its flow and fate during water treatment processes. In this study, an assessment of the characteristics and flow of NOM along the treatment train at the full scale treatment plant at Masaka, Uganda, ...


    By IWA Publishing

  • APEX hose pumps replace PC pumps for reliable bentonite pumping at South African waterworks

    A major waterworks in South Africa is benefitting from the installation of Bredel APEX15 hose pumps from Watson-Marlow Fluid Technology Group. The APEX pumps have been preferred over progressive cavity (PC) pumps ...

  • A comparison study on Acid Red 119 dye removal using two different types of waterworks sludge

    This study aims to compare the performance of two waterworks sludge samples, ferric chloride sludge (FCS) and polyaluminium chloride sludge (PACS), as coagulants to remove Acid Red 119 (AR119) dye from aqueous solution. A series of batch experiments were performed to investigate the effect of initial pH, coagulant dosage and initial dye concentration on coagulation/flocculation process ...


    By IWA Publishing

  • Old mission dam and flume: preliminary findings of new research on the waterworks system of mission San Diego de Alcalá, San Diego County, California.

    The Old Mission Dam and Flume is an historically significant system of water control structures on the San Diego River, San Diego County, California. This system, designed and built from the late 1700s to the early 1800s by Franciscan missionaries and Kumeyaay Indians associated with the Mission, was intended to provide a reliable year-round supply of water to Mission San Diego de Alcalá and to ...


    By Hargis + Associates Inc

  • Water treatment Rand Water, South Africa

    Rand Water is one of the largest waterworks worldwide with a capacity of 4,8 Mio m³ per day for the water supply of 10 millions of people in a radius of 18.000 km2. The two principal works are situated in the industrial centre of South Africa. 8 different Grundfos Alldos chlorine stations with a capacity of up to 120 kg disinfect the water using chlorine gas. More than 100 dosing pumps provide ...


  • Prospective environmental and economic assessment for biotreatment of micropollutants in drinking water resources in Denmark

    A prospective environmental life cycle assessment (LCA) and financial cost assessment is performed to the application of bioaugmentation to sand filters in Danish waterworks, to remove 2,6-dichlorobenzamide (BAM) from drinking water resources. Based on pilot-scale and laboratory-scale data, we compare bioaugmentation to current alternative strategies, namely granular activated carbon (GAC) ...


    By IWA Publishing

  • Construction of delicate systems to manage water distribution systems and minimize water losses: endeavors and challenges in Beijing

    The rapid population growth in Beijing exacerbates the contradiction between social and economic development and water resource shortage. The provision of sufficient and safe drinking water with reasonable pressure to local residents is the primary goal for Beijing Waterworks Group. The South-to-North Water Diversion Project is valuable to alleviate the water resource crisis in Beijing; however, ...


    By IWA Publishing

  • Hydrogenic City 2020 Project

    Water is often taken from ecologically vulnerable areas. This movie is proposing an initiative to create a network of ecologically sensitive and aestetically compelling water reclamation centres, so the waterworks infrastructure gets a public dimension as they are integrated in the local community and serve more than one purpose. ...


    By IWA Publishing

  • Effectiveness of reconstruction of water supply system from the economic viewpoint and affecting factors – case study of a city

    To solve the issues of decreasing revenue of waterworks caused by population decline and increasing renewal cost caused by ageing facilities, it is necessary to strengthen the financial base of the waterworks by undertaking efficient reconstruction of water supply system, and the cost of future renewal demands and anti-seismic upgrading need to be reduced. This paper evaluates the effectiveness ...


    By IWA Publishing

  • Effect of oxygen deprivation on treatment processes in a full-scale drinking water biofilter

    Dissolved oxygen is critical for proper operation of waterworks that utilize anaerobic groundwater and rely on biofilters to remove iron, manganese and ammonium. In these biofilters, planned or inadvertent oxygen deprivation may occur for a variety of reasons. The water quality effects of oxygen deprivation on the function of drinking water biofilters, however, have not previously been reported. ...


    By IWA Publishing

  • Study on failure rate analysis for water distribution pipelines

    Many of the waterworks facilities in Japan were constructed during the rapid economic growth period. Today, the deterioration and renovation of these aged facilities have become a pressing issue. There are approximately 600,000 km worth of water pipelines laid out across Japan, accounting for about 70% of the nation's water-related assets (totalling ¥40 trillion). To provide water that is safe to ...


    By IWA Publishing

  • What You Need to Know about Electronic Automation of Hydraulically-operated, Diaphragm-actuated Control Valves

    Hydraulically controlled, diaphragm-actuated control valves are the mainstay of the waterworks industry to control pressure, flow, level, pump control, and at times to meter. These automatic control valves are controlled by pilots to do specific tasks and are mainly single-set-point systems. With the need to remotely actuate and control the valves and the applications becoming more complex, ...


    By IWA Publishing

  • Groundwater management: a search for better policy combinations

    Excessive groundwater pumping is now a global concern. There is no panacea for this problem, which needs to be addressed through continual policy improvements based on case studies. Good examples of the diversity of groundwater management are demonstrated by the Tokyo (Japan) and Orange County Water District (OCWD, California, USA) experiences. In Tokyo, excessive groundwater pumping was ...


    By IWA Publishing

  • Removal of arsenic from contaminated groundwater with application of iron electrodissolution, aeration and sand filtration

    The results from a new water treatment system for arsenic removal are presented. The technology is based on the employment of an electrolytic iron dissolution and efficient aeration procedure prior to sand filtration. The treatment was introduced and investigated in a pilot scale plant and full scale waterworks. The pilot scale results showed the potential for efficient arsenic removal from ...


    By IWA Publishing

  • Grundfos reference – disinfection case study

    First SELCOPERM unit installed within the Czech Republic to serve for potable water disinfection through the electrical chlorination method ŽLUTICE, Czech Republic: 1/3 of the total capacity of the waterworks at Žlutice has been designed for supplying drinking water to a group of communities found within the catchment area of Žlutice (approximate population of 14,000), the remaining 2/3 ...


  • Ceramic membranes for water treatment

    Ceramic membranes, different in pore size and membrane material, were applied to remove particulate and dissolved matter from different spent filter backwash water types as well as from dam water. The study was conducted in pilot scale under conditions typical for waterworks at a dam water treatment plant. A comparison of different ceramic membranes implied that total membrane resistance was more ...


    By IWA Publishing

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