sand filter Articles
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Numerical prediction of the performance of horizontal sand filters as the pitch of the spiral protrusion changes
The height of vertical sand filters are limited due to their structural cost. A horizontal sand filter may offer a better alternative; however, flow channels to the least resistance zone generated at the top of the filter as the sand gets wet and settles. A horizontal sand filter, internally baffled with spiral protrusion, is numerically modelled to study the effect of these spirals in reducing ...
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A farewell to sand filters
By replacing the filter sand with Filtralite, Bedrichov Water Treatment Plant reduced energy cost by 75 %, doubled the production capacity of each filter and today delivers the best drinking water ...
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Simulation of oxidation processes and biomass growth in intermittent sand filter
Infiltration percolation is an extensive treatment process aimed at eliminating organic pollution, oxidizing ammonia and removing pathogens. The main purpose of this work was to improve, by means of a numerical model, the understanding of oxidation processes and biomass development in an intermittent sand filter. Hydrodynamic, dispersion and biologic parameters were calibrated and validated after ...
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Project - WTP Metakor
Process: Toveko sand filter Flow: 6 m3/h SS out: less than 10 mg/l Application: heavy metals removal ...
By KAMPS s.a.
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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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Effects of earthworms on surface clogging characteristics of intermittent sand filters
Intermittent sand filters (ISFs) are effective and economical in treating wastewater, but they are easy to clog up. To explore a feasible and simple method to alleviate clogging, two pilot-scale ISFs were constructed, one of which contained earthworms and the other did not. During the operation, the effects of earthworms on the hydraulic behaviour of ISFs were investigated. The results showed ...
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Project - WTP SO.TRA.EX
Process: Toveko sand filter Application: Drinking water producer: back-wash filtration Flow: 30 m3/h SS out: ...
By KAMPS s.a.
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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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A farewell to sand filters
By replacing the filter sand with Filtralite, Bedrichov Water Treatment Plant reduced energy cost by 75 %, doubled the production capacity of each filter and today delivers the best drinking water ever A new filtering medium is born After six months of testing the new filtering medium Filtralite in full operation at Bedrichov Water, regional manager Ladislav Rainis (right) and local ...
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Test of precoat filtration technology for treatment of swimming pool water
The technical performance of a precoat filter was compared with that of a traditional sand filter. Particle concentration and size distribution were measured before and after the filtration of swimming pool water. Both the sand and precoat filters could reduce the particle concentration in the effluent. However, higher particle removal efficiency was generally observed for the precoat filter, ...
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Hong Kong University of Science & Technology Outdoor Swimming Pool
The Site: The outdoor swimming pooi has three sand filters, two carbon filters and one ozonator. The ozonator broke down regularly, whenever the temperature in the operating room was too high. The Ozonator was used because management wanted to reduce the chiorine dosage from 3ppm to lppm. Back washing frequency of the sand filters was weekly and the carbon in the carbon filters was replaced ...
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Disinfection of tertiary wastewater effluent prior to river discharge using peracetic acid; treatment efficiency and results on by-products formed in full scale tests
This is an investigation of chemical disinfection, with peracetic acid (PAA), in a tertiary sand filter at a full scale activated sludge plant with nitrification/denitrification and P-removal. The reduction efficiency of Escherichia coli and intestinal enterococci in the sand filter is reported. E. coli log reductions of between 0.4 and 2.2 were found with contact times from 6 to 37 min and ...
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Limited effectiveness of household sand filters for removal of arsenic from well water in North Vietnam
Since well water utilized for domestic purposes in the Red River Delta of North Vietnam has been reported to be polluted by arsenic, barium, iron, and manganese, household sand filters consisting of various components are used. Information regarding the effectiveness of various sand filters for removal of the four toxic elements in well water is limited. In this study, arsenic levels in 13/20 ...
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Drinking water treatment, AFM replaces sand in sand filters
Drinking Water Treatment by AFM, 30% - 80 improvement in sand filter performance Cryptosporidium problem and THM's eliminated. All sand filter will suffer to some degree from bacterial fouling. The alginates excreted by the bacteria cause coagulation of the sand grains which in turn leads to wormhole channeling of water through the filter bed. The worm holes provide a conduit for the ...
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Removals of cryptosporidium parvum oocysts and cryptosporidium-sized polystyrene microspheres from swimming pool water by diatomaceous earth filtration and perlite-sand filtration
Removal of Cryptosporidium-sized microspheres and Cryptosporidium parvum oocysts from swimming pools was investigated using diatomaceous earth (DE) precoat filtration and perlite-sand filtration. In pilot-scale experiments, microsphere removals of up to 2 log were obtained with 0.7 kg·DE/m2 at a filtration rate of 5 m/h. A slightly higher microsphere removal (2.3 log) was obtained for these ...
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Sand Filters for Cargill Food Industry O - Case Study
Specifications: Capacity: 90 m3/h, inside and outside sandblasting + epoxy coating, full automatic. Complete weight: 24 tons. Scope of work: Project of filter tanks and piping, manufacturing, transportation, erection and piping as turnkey basis. ...
By ASTIM A.S.
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Nova Scotia - Communal Development case study
Site: Voyager Lakes Development Location: Nova Scotia, Canada “Unique” and “Visionary” are terms that have been used to describe the new equestrian oriented Voyageur Lakes development outside Halifax, Nova Scotia. Voyageur Lakes is a mixed-use development that includes, residential homesites, shops and at the heart of the development an Equestrian Center. Voyageur ...
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Experimental study on performance of sand filter layer to remove non-point source pollutants in rainwater
Clogging characteristics of conventional sand filter layers with different grain-size distributions were experimentally studied to estimate their filtration capacity to capture non-point source pollutants in an artificial rainwater reservoir. A series of laboratory-scale chamber tests was conducted for artificial urban runoff synthesized with non-point source pollutants collected from a real ...
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YANG PYUNG, Korea: Ecoskid–Elimination of turbidity and microbiological retention
The Yang Pyung drinking water treatment plant was equipped with a sand filter process up until 2005. To improve water quality, the city chose the Aquasource technology to modernize its plant. It is the first unit equipped by Aquasource in ...
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Tula Project - Case Study
Customer: Hager & Elsässer (Germany) Project Name: Tula WWTP (Russia) Manufacturing year: 2008 Scope of supply 2 pcs. Ø 2.500 x 2.500 mm. Sand Filter Tanks supplied complete with supporting legs, manholes, sight glasses, nozzles etc. Maximum Working Pressure of 6 bars; Material: CS 2 pcs. Ø 2.600 x 5.120 mm. Bio-Filter Tanks supplied complete with supporting ...
By ASTIM A.S.
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