continuous sand filter Articles

  • Green Sand Filters, Chile

    INTRODUCTION In August 2013, Pure Aqua, Inc. manufactured and supplied Green Sand Filters to a major company in Chile to lower the manganese and iron level in well water. The system came complete with tank, top mounted valves, and high quality green sand media. The system was designed to produce 24 GPM. Since the initial startup, ...


    By Pure Aqua, Inc.

  • Remediation of a Community’s Cluster System Sand Filter Utilizing Continual Biological Augmentation

    This case study investigates the use of continual microbiological augmentation to remediate a community sand filter serving 22 homes in upstate New York State. The problem identification, solution development, plan implementation, and results phases of the project are covered. The project saved the community several thousand dollars over other proposed solutions while increasing treatment ...

  • The Growing Threat To Canada`s Oil Sands Boom

    The Alberta Oil Sands reserves are among the top three oil reserves in the world, and are being aggressively developed by the world's largest energy producers; The Oil Sands are being counted on to replace falling production elsewhere in the world, and are strategically important to the energy industry; Extracting oil from the sands is highly water-intensive and ...


    By Biolargo, Inc.

  • A technology for the treatment of olive-mill waste water in a continuously fed plant

    Abstract A bench-scale pilot plant has been developed for the treatment of olive-mill water. The plant is fed in a continuous mode and implements a primary treatment (sand filtering and irradiation with UV-rays) and a secondary treatment (anoxic and aerobic biological treatment). Satisfactory results were obtained and the treated green water falls under the limits of the Italian legislation. ...


    By Springer

  • Gravity self-backwashing filters

    The filtration of make-up and side-stream water in closed cooling circuits, operated through cooling towers, is a fundamental step to ensure safe and continuous operations in a power plant. Water - required in large amounts for this application - should not be wasted, and the potential damages deriving from a poor treatment must be avoided at all cost. BONO ARTES has developed a technical ...


    By Artes Ingegneria SpA

  • A pilot-scale study of Cryptosporidium-sized microsphere removals from swimming pools via sand filtration

    Cryptosporidium species are the most common cause of gastrointestinal illness in treated recreational water venues. In order to protect public health during swimming, Cryptosporidium-sized microsphere removals by high-rate sand filtration with six coagulants were evaluated with a 5.5 m3 pilot-scale swimming pool. A sand filter without ...


    By IWA Publishing

  • Continuous phosphorus removal from water by physicochemical method using zero valent iron packed column

    Excessive phosphorus in aquatic systems causes algal bloom resulting in eutrophication. To treat wastewater including effluent of wastewater treatment plant containing various amounts of phosphorus, a series of continuous experiments on removal of phosphorus from water were performed by using an electrochemical method. The spherical type of zero valent iron (ZVI) and silica sand were packed at ...


    By IWA Publishing

  • Breakthrough studies with mono-, binary- and ternary-ion systems comprised of Fe(II), F and As(III) using river sand packed columns for groundwater treatment

    Groundwater in Assam, India, contains excessive amounts of arsenic (As(III)), fluoride (F−) and iron (Fe(II)). The rural and semi-urban population of Assam uses indigenous iron filters fabricated using processed sand (PS) as one of the chief constituents to reduce Fe(II) concentration; however, no efforts have been made to reduce As(III) or F− concentrations before use. ...


    By IWA Publishing

  • Influence of powdered Moringa oleifera seeds and natural filter media on the characteristics of tapioca starch wastewater

    Moringa oleifera tree is indigenous and highly abundant in Indonesia and its seeds are widely known to be used as a natural coagulant for treating wastewater. Wastewater from tapioca starch industry, particularly in Indonesia, which contains high organic matters, was revealed by high biochemical oxygen demand (BOD) and chemical oxygen demand (COD) value. In this study the combination of powdered ...

  • A Low Cost Solution to Reduce Total Nitrogen Discharged from WWTPs – Meeting the 3 mg/L Regulatory Limit in Total Nitrogen Using Existing Downflow Tertiary Media Filters as a Medium for Denitrification

    Existing tertiary media filters for solids removal may be used as a medium for denitrification of the secondary effluent to reduce the Total Nitrogen (TN) discharged by a Wastewater Treatment Plant (WWTP). This study explores the use of tertiary media filters as a low-cost solution for WWTPs in reducing TN levels to meet upcoming nutrient discharge regulations. Three pilotscale filters with sand ...

  • Hydraulics stability of compost-based filtration media

    The longevity of compost-based storm water filtration systems has not been widely studied. Hydraulic conductivity measurements of compost amended sand media (20% and 50% v/v) within columns were undertaken. The results show that the filtration media in both columns had a reduction in the total saturated hydraulic conductivity. A tracer test showed there was no blockage due to biological or ...


    By Inderscience Publishers

  • Effects of intermittent polyelectrolyte addition on water quality in direct filtration

    The effects of intermittent polyelectrolyte addition on the quality of effluent water and on the development of filter headloss were studied. Anionic and cationic polyelectrolytes were applied to two similarly constructed pilot sand filters. The surface water used in the study was obtained from Ömerli, which is one of the main drinking water reservoirs of Istanbul. Six sets of experiments were ...


    By IWA Publishing

  • Sludge drying beds, Sarasota County, Florida

    Dewatering sludge at wastewater treatment plants has traditionally been a major operational concern. Most large operations must use mechanical filter presses or centrifuges to efficiently dewater their sludge. For many smaller operations, however, this equipment is too expensive and too large for their needs. Therefore, many smaller facilities rely on the sand filter drying beds for sludge ...


    By Presto Geosystems

  • Efficient Removal of Organic and Inorganic Suspended Solids

    ABSTRACT The Romans used sand as a filter media to treat their drinking water 2000 years ago. Centuries ago water was poured through layers of cloth to remove visible impurities in drinking water with fabric bags and paper cartridges soon following. Darcy employed sand beds in Dijon, France over 200 years ago to conduct his experiments for developing his famous equation to describe fluid flow ...

  • Mine backfill

    Mine backfill is defined as the material used to fill the cavities (i.e., stopes) created by underground mining. Backfilling can be a means to dispose of sludge and/ or tailings which may contain hazardous materials and to reduce surface environmental impacts by storing tailings underground. Alternately, backfilling with nonhazardous materials can allow for mining productivity improvements. To ...


    By WesTech Engineering, Inc.

  • Downflow filtration technology keeps contaminants at bay

    Just south of present day Lumpkin, GA, you can visit a reconstructed community from the 1850s and experience a taste of everyday life from that time period. In dramatic contrast, you will also find one of the water and wastewater industry’s most advanced filtration technologies in this same area. This technology was installed specifically to protect the Lumpkin area from the damaging effects of ...


  • PCB removal

    Project Profile:PCB Removal from Ground Water DATA: End User: Aluminum Producer Location: Pacific Northwest, USA Commisioned: Summer, 2002 Units: (3) model FDB-340P (340 ft2/filter) Flow Rate: 12,000 gpm (17.3 Million gallons of water per day) ...


    By Filtra Systems

  • Methods of Water Purification

    This article is excerpted from 'Pure Water Handbook' published by Osmonics®, Inc. of Minnetonka, Minnesota USA and is printed with permission of Osmonics, Inc. Water treatment can be defined as any procedure or method used to alter the chemical composition or natural 'behavior' of a water supply. Water supplies are classified as either surface water or groundwater. The majority of public or ...

  • Understanding Crossflow Filtration

    There's a lot of attention being given to water availability and purity, with good reason. Obtaining enough water is a struggle in some areas. In others, water is tainted with contaminants. It is therefore predictable that regulations and economics will force careful water treatment and stress water re-use. Fortunately, there are water treatment methods that can help you meet the water quality ...


  • Seatac airport third runaway

    Active Treatment with 1% ChitoVan™ Chitosan Acetate The west side of Sea-Tac airport was widened by adding 11 million cubic yards of fill dirt to create the 3rd runway. Because the west side of the airport drains to Miller Creek, a protected NW stream, all of the construction stormwater had to be captured and treated prior to discharge. During the project over 5 billion gallons of ...


    By Dungeness Environmental

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