filter bed Articles
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Case study - Upper Uvdal wastewater treatment plant - Filter bed
The plant is designed as a traditional chemical and biological treatment plant, as a polishing step the effluent is going thru a filter bed with Filtralite before it is discharged into a small creek. The filter bed treatment plant is built with Filtralite P in Nore and Uvdal municipal in Norway. Uvdal ski resort, some houses and several hundred holiday homes are connected to the treatment plant. ...
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Lauvåsen wastewater treatment in filter beds Norway
Lauvåsen is a cluster of houses, holiday homes and a tourist resort in Sør-Fron municipal in Norway. 25 holiday homes, 3 houses and one tourist resort are connected to the treatment plant. This gives a dimensioning flow of: Qdim = 63 m3/day, a total of 284 pe. The treatment plant was built in 2002. Filter media used in this plant: 930 m3 Filtralite® P 0-4 mm270 m3 Filtralite® NR 2-4 mm60 m3 ...
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The impact of fractionation of hydraulic load on oxidation performances of sand filters
Infiltration–percolation is an extensive treatment technique aimed at eliminating organic matter, oxidizing nitrogen, and removing pathogens. The main purpose of this work is to evaluate the impact of fractionation of hydraulic load on oxidation performances of unsaturated sand filters. Experimental results showed that oxidation of organic matter and ammonium nitrogen has mainly occurred in ...
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Two innovative devices for depth sampling in granular filtration systems. Desalination 286: 115–119, 2012.
Appropriate devices for obtaining either interstitial water or grain particle samples or for measuring dissolved oxygen (DO) at depth within the interior of large-scale, industrial granular bed filters are currently lacking. We developed two innovative samplers for studying a Rapid Sand Filter (RSF) at an operational SWRO plant: the first for water and granular material, the second for DO ...
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A novel acoustic imaging tool for monitoring the state of rapid sand filters
A new technology based on acoustic waves is developed to monitor the state of sand filters used in drinking water treatment. Changes in the sand filter, due to the removal of suspended particles from the water and their accumulation in the pores, result in an increase of the bulk density and acoustic speed of the granular material. Consequently, the reflected acoustic response changes as the ...
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Evaluation of a hybrid upflow anaerobic sludge-filter bed reactor: effect of the proportion of packing medium on performance
The aim of this study was to determine the effects of the volume occupied by the filter bed zone on the behavior of an anaerobic hybrid UASFB reactor. This configuration contains a sludge bed in the lower part of the reactor and a filter bed in the upper part. Three such reactors, each with a working volume of 9.8-L, were studied; these differed in proportion of packing medium occupying 50, 35 ...
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Knitted Mesh Filter Element
KNITTED METAL WIRE MESH FILTER ELEMENTS We are supplier of knitted wire mesh filters mainly alloy knit mist filter elements, demsiter pad filters, actuator filters. Alloy 20 Co-Knit Metal Filter Element - for Sulfuric Acid Plant Application Mist Eliminator Element for Sulfuric Acid plant, details as below: Co-Knit Alloy 20 Metal (Impaction Bed) Filter Element Fiber woven Bed (Brownian Bed) ...
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The simple, effective and economical treatment of odourous emissions
The odours from an anaerobic digester and a waste handling depot were fed to two large biofilters with wood chip packing. The seeding of the biofilters was carried out using a microbial product, BFL Odour Clean. For the initial seeding of the biofilter with microbial cultures a manual method of application was used. Careful application of the product to the entire filter bed is key to the success ...
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Odour control case study
A Scottish maggot farm, supplying bait for fishing, faced the problem of dealing with ammonia odours emitted during production. The Scottish Environmental Protection Agency (SEPA) had given the company an emissions discharge consent level of a demanding 5ppm of ammonia. To achieve this the maggot farm commissioned a biofilter to remove the pollutants from the air stream. The design of the ...
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Rapid sand filtration pretreatment for SWRO: microbial maturation dynamics and filtration efficiency of organic matter..Desalination 286 :120, 2012
Rapid sand filtration (RSF) is used today as an effective pretreatment procedure to enhance water quality prior to reverse osmosis (RO) membranes in desalination plants. RSF in newly operated desalination facilities requires a maturation period of about three months before the feedwater may be filtered efficiently. To date the desalination industry RSF has regarded RSF mainly as a physical ...
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Performance of modified design pond sand filters
Two pond sand filters (PSFs) with modified design were constructed in Pathorghata Upazila of Barguna District located in southern Bangladesh. Performance assessment of the PSFs was done after commissioning in terms of quality of filtered water, ease of operation and maintenance, monthly check-up of production capacity/efficiency of the filters, users' participation and acceptability of the ...
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Use of bauxite for enhanced removal of bacteria in slow sand filters
Slow sand filtration (SSF) is a well-known process for drinking water treatment and is widely used for the production of biologically stable drinking water and particle removal. The removal process of particles and microorganisms is highly dependent on the buildup of the schmutzdecke at the filter surface. During the ripening period and especially for cold waters, the buildup of the ...
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Removal of Tramp Oil with an Oil Skimmer from Cooling Water in a Steel Mill - Case Study
Acchieving Process Optimisation and Cost Reduction The Problem The cooling water system at a steel rolling mill is heavily contaminated with tramp oil due to various oil leaks. Small amounts of oil and very viscous grease come from the lubrication of the roll bearings. Hydraulic systems leak small but continual amounts of hydraulic oil into the cooling water system. Burst hoses or damaged piping ...
By Friess GmbH
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Fiber Bed Filtration - Not All Filters are Designed the Same
Optimal filtration is imperative during times of heavy manufacturing and taxing demands on manufacturing plants. It has never been more important to maintain a line of quality filtration to reduce opacity and emissions. Fiber Bed Filters mist collectors are used to trap, collect, and remove liquids and soluble particulate suspended in a gas stream. Fiber bed filters, also known as Candle Filters, ...
By Kimre Inc.
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Evaluation of clogging in planted and unplanted horizontal subsurface flow constructed wetlands: solids accumulation and hydraulic conductivity reduction
This study aimed to evaluate the behaviour of two horizontal subsurface flow constructed wetland units regarding solids build up and clogging of the filter medium. In order to analyse the causes of this process, which is considered the major operational problem of constructed wetlands, studies were carried out to characterize accumulated solids and hydraulic conductivity at specific points of ...
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Sludge drying beds, Sarasota County, Florida - Case Study
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 ...
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Iron and manganese removal from groundwater by filtration through a chalcedonite bed
The aim of this research was to determine the effectiveness of iron and manganese removal from groundwater using chalcedonite sand as a filter bed in rapid filtration. The experiment was conducted at a pilot plant. At the first stage of research, chalcedonite and silica sand were compared. The ripening time for manganese removal of chalcedonite was 27 days while silica sand was ripened within ...
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Understanding the factors influencing the removal of heavy metals in urban stormwater runoff
In this research, an infiltration trench equipped with an extensive pretreatment and filter bed consisting of woodchip, sand and gravel was utilized as a low impact development technique to manage stormwater runoff from a highly impervious road with particular emphasis on heavy metal removal. Findings revealed that the major factors influencing the removal of heavy metals were the ...
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Application of recycled sludge to stabilize coagulation process
In conventional treatment of variable quality mountain water, an inability to immediately adjust the coagulant dose to variations in water quality causes overdose or underdose of coagulant in relation to its optimal value. The results of the research showed that the reuse of post-coagulation sludge was an effective method to maintain high and stable coagulation effectiveness under both ...
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Lac Mégantic disaster increases awareness of water treatment plant vulnerability - Case Study
A train pulling 72 tank cars, laden with oil from hydraulic fracturing (fracking) in North Dakota, derailed and exploded in Lac-Mégantic, Québec on July 6, 2013, killing 50 people. Such accidents are a product of the boom in “pipeline on rails” methods of shipping oil. In 2009, a mere 500 tank cars of oil were transported by rail in Canada. For 2013, this was projected ...
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