scholarly journals Performance of geotextile-based slow sand filter media in removing total coli for drinking water treatment using system dynamics modelling

Heliyon ◽  
2020 ◽  
Vol 6 (9) ◽  
pp. e04967
Author(s):  
Nurina Fitriani ◽  
Maritha Nilam Kusuma ◽  
Budisantoso Wirjodirdjo ◽  
Wahyono Hadi ◽  
Joni Hermana ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
System Dynamics ◽  
Drinking Water Treatment ◽  
Filter Media ◽  
Sand Filter ◽  
System Dynamics Modelling ◽  
Slow Sand Filter ◽  
Dynamics Modelling

Novel dual media combination for drinking water treatment

2007 ◽  
Vol 7 (5-6) ◽  
pp. 131-139 ◽  
Author(s):  
A. Mikol ◽  
C.S.B. Fitzpatrick ◽  
M.J. Chipps ◽  
M.E.J. Steele ◽  
R.G.W. Bayley
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
High Density ◽  
Low Density ◽  
Sand Filter ◽  
Suitable Alternative ◽  
Slow Sand Filter ◽  
Adequate Quality ◽  
Run Lengths

A novel media combination comprising of two layers of commercially available expanded clay (EC) media was tested for use in existing roughing filters (RF). Results have indicated a potentially suitable alternative to anthracite/sand, a dual media combination of a fine grade of high density EC media and a coarse grade of low density EC media. This novel dual media consistently achieved longer run lengths, whilst producing filtrate of adequate quality for slow sand filter influent – even when challenged with algal laden water.

Diagnosis and Renovation of a Time-worn Rapid Sand Filter used for Drinking Water Treatment

2016 ◽  
Vol 25 (7) ◽  
pp. 999-1005
Author(s):  
Sang-Goo Kim ◽  
◽  
Hyun-Seog Park ◽  
Hee-Jong Son ◽  
Jeong-Gyu Lee ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Sand Filter

scholarly journals The Use of Multi-criteria Analysis in Selecting Water Treatment Units in Sadu Water Treatment Plant, Bandung District, West Java Province, Indonesia

2019 ◽  
Vol 3 (2) ◽  
pp. 65
Author(s):  
Riana Ayu Kusumadewi ◽  
Indry Kemala Sani ◽  
Winarni Winarni
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Supply ◽  
Treatment Unit ◽  
Sand Filter ◽  
Complete Treatment ◽  
Slow Sand Filter ◽  
Multi Criteria Analysis ◽  
Sludge Drying ◽  
Water Supply Company

Abstract: Increasing the number of residents and still not fulfilling the scope of drinking water services for resident of Bandung Regency, Tirta Raharja Regional Water Supply Company is developing in the field of drinking water supply. To improve community drinking water services in the Bandung Regency area, Tirta Raharja Water Supply Company plans to add a drinking water tratment plant with a capacity of 150 liters/second located in Sadu Village, Soreang District, Bandung Regency. In the planning of the Sadu WTP (Sdau Water Treatmnet Plant) was carried out several stages of planning, i.e. literature study, preliminary survey, data collection, alternative selection of treatment units using multi criteria analysis, and calculation of treatment unit dimensions. the parameters under review are those that exceed the standard of quality according to the Minister of Health Regulation No. 492 of 2010, i.e. turbidity, BOD, COD and fecal coliform. The selection of Sadu WTP units is based on parameters that exceed drinking water quality standards. There were two alternative proposed (Alternative I and Alternative II) in drinking water treatment, i.e. complete unit (Alternative I) consisting of intake; hydraulic coagulation; hydraulic flocculation; tube settler sedimentation; rapid sand filter; reservoir; disinfection; and sludge drying bed, and slow sand filter unit (Alternative II) consisting of intake, pre-sedimentation, slow sand filter, reservoir, disinfection, and sludge drying bed. The method to be used in determining the unit plan is multi-criteria analysis which refers to aspects based on Minister of Public Works Regulation No. 18/PRT/M/2007. Based on the results of the scoring obtained, the complete treatment unit has the highest score, i.e. 4.05, so the alternative treatment used in the Sadu WTP is the complete treatment unit (Alternative I).

Characterization of Particles in Slow Sand Filtration at North Caribou Water Treatment Plant

2003 ◽  
Vol 38 (1) ◽  
pp. 153-168 ◽  
Author(s):  
Beata Gorczyca ◽  
David London
Keyword(s):  
Water Treatment ◽  
Microscopic Analysis ◽  
Plant Design ◽  
Raw Water ◽  
Filter Media ◽  
Sand Filters ◽  
Sand Filter ◽  
Particle Counter ◽  
Filter Performance ◽  
Slow Sand Filter

Abstract Microscopic analysis of particles in water can indicate the size of filter media required, and can be used to monitor filter performance. This study investigated a malfunctioning slow sand filter in a water treatment facility on a First Nations community in Northern Ontario. There has been a boil-water advisory in the community due to high turbidity in the drinking water since the plant was put into operation. Also, the slow sand filters in the plant clog frequently resulting in outflow volumes significantly below the plant design capacity. On-line particle counts and microscopic analysis of water were conducted in the plant at various points before and after the slow sand filters. Microscopic analysis of the slow sand filter effluent showed that the high water turbidity was due to an increased concentration of particles smaller than 2 µm in size. This observation could not have been made with the particle counter data alone, as it is not capable of measuring particles of that size. Visual inspection of microscopic images of these small particles indicated that they were being washed out from the filter media, and did not originate from the raw water. Significant numbers of large filter-clogging diatoms (up to 50 µm in size) were identified under the microscope; yet, the particle counter did not report particles larger than 15 µm in raw water supply. Turbidimeters and particle counters were found to be unable to identify these diatoms, due to the transparent nature of the cell walls of these microorganisms. It is likely that most of these diatoms originated from sediment accumulated in the raw water intake pipe.

scholarly journals Microbial degradation pathways of the herbicide bentazone in filter sand used for drinking water treatment

2019 ◽  
Vol 5 (3) ◽  
pp. 521-532 ◽  
Author(s):  
Mathilde J. Hedegaard ◽  
Carsten Prasse ◽  
Hans-Jørgen Albrechtsen
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Microbial Degradation ◽  
Drinking Water Treatment ◽  
Filter Material ◽  
Transformation Products ◽  
Degradation Pathways ◽  
Sand Filter

Three bentazone biodegradation pathways were identified in rapid sand filter material and relevant transformation products were less hazardous than bentazone.

scholarly journals Bioaugmented sand filter columns provide stable removal of pesticide residue from membrane retentate

2020 ◽  
Author(s):  
Lea Ellegaard-Jensen ◽  
Morten Dencker Schostag ◽  
Mahdi Nikbakht Fini ◽  
Nora Badawi ◽  
Alex Gobbi ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Pesticide Residues ◽  
Drinking Water Treatment ◽  
Residual Water ◽  
Sand Filters ◽  
Water Stream ◽  
Sand Filter ◽  
Degrading Bacteria ◽  
Membrane Treatment

ABSTRACTDrinking water resources, such as groundwater, are threatened by pollution. The pesticide metabolite 2,6-dichlorobenzamide (BAM) is one of the compounds frequently found in groundwater. Studies have attempted to add specific BAM-degrading bacteria to sand-filters at drinking water treatment facilities. This biotechnology has shown great potential in removing BAM from contaminated water. However, the degradation potential was formerly lost after approximately 2-3 weeks due to a decrease of the degrader population over time.The aim of the present study was to overcome the constraints leading to loss of degraders from inoculated filters. Our approach was threefold: 1) Development of a novel inoculation strategy, 2) lowering the flowrate to reduce washout of cells, and 3) increasing the concentration of nutrients hereunder the pollutant in a smaller inlet water stream. The two latter were achieved via modifications of the inlet water by applying membrane treatment which, besides producing an ultra-pure water fraction, produced a residual water stream with nutrients including BAM concentrated in an approximately 10-fold reduced volume. This was done to alleviate starvation of degrader bacteria in the otherwise oligotrophic sand-filters and to enable a decreased flowrate.By this approach, we achieved 100% BAM removal over a period of 40 days in sand-filter columns inoculated with the BAM-degrader Aminobacter sp. MSH1. Molecular targeting of the degrader strain showed that the population of degrader bacteria persisted at high numbers throughout the sand-filter columns and over the entire timespan of the experiment. 16S rRNA gene amplicon sequencing confirmed that MSH1 dominated the bacterial communities.IMPORTANCEMany countries rely partly or solely on groundwater as the source of drinking water. Here groundwater contamination by pesticide residues poses a serious threat to the production of high quality drinking water. Since scarcity of clean groundwater may occur in progressively larger areas both locally and globally, the need for efficient purification technologies is growing. This study shows that a novel system combining membrane treatment and bioaugmented sand-filters can efficiently remove pesticide residues in laboratory columns when applying specific inoculation and flow conditions. Once upscaled, this system can be used directly for pump-and-treat of contaminated groundwater wells or at drinking water treatment plants.

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