scholarly journals Chemical and ecotoxicological assessments of water samples before and after being processed by a Water Treatment Plant

2014 ◽  
Vol 9 (1) ◽  
Author(s):  
Regina Teresa Rosim Monteiro ◽  
Gabriela Helena Silva ◽  
Tâmara Guindo Messias ◽  
Sonia Claudia Nascimento Queiroz ◽  
Marcia Regina Assalin ◽  
...  
Keyword(s):  
Water Treatment ◽  
Water Samples ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Before And After

scholarly journals Enteric illness risks before and after water treatment improvements

2009 ◽  
Vol 7 (4) ◽  
pp. 581-589 ◽  
Author(s):  
Floyd J. Frost ◽  
Kristine Tollestrup ◽  
Melissa Roberts ◽  
Twila R. Kunde ◽  
Gunther F. Craun ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Phase 1 ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Water Source ◽  
Control Site ◽  
Increased Risk ◽  
Before And After ◽  
Quality Surface

This study evaluated whether occurrence of acute gastrointestinal illnesses declined after filtration and ozonation were added to a previously unfiltered, chlorinated high-quality surface water source in a northwest United States city. Enteric and other illnesses were recorded for two 6-month periods for control and intervention sites in the same city. During phase 1, chlorinated, unfiltered drinking water for both sites was obtained from protected watersheds. During phase 2, the intervention site received chlorinated, filtered and ozonated drinking water. The water was not altered in the control site. No overall differences were found in the risk of any of the illnesses after the new water treatment plant was completed. There was a significantly increased risk of diarrhoea and highly credible gastrointestinal illness in participants with three or more episodes of the same type of illness during phase 1.

scholarly journals The formation of aldehydes and ketones ozonation by-products and their variation through general water treatment plant in Hamadan, Iran

2015 ◽  
Vol 17 (4) ◽  
pp. 682-691 ◽  
Keyword(s):  
Water Treatment ◽  
Pyruvic Acid ◽  
Water Samples ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Methyl Glyoxal ◽  
Aldehydes And Ketones ◽  
Glyoxalic Acid ◽  
Treatment Train ◽  
By Products

<div> <p>The effect of pre-ozonation on the formation of four aldehydes (i.e. formaldehyde, acetaldehyde, glyoxal, methyl glyoxal) and two ketones (i.e. pyruvic acid and glioxalic acid) at the Beheshti water treatment plant in Hamadan, Iran were studied. Water samples were taken from the treatment plant at different points of the treatment train during September-January, 2013. The variation of formaldehyde, acetaldehyde, glyoxal, methyl glyoxal, pyruvic acid, and acid glioxalic concentration within treatment process were monitored in September and January. The results indicated that formaldehyde and acetaldehyde were the most abundant aldehyde species in the raw water. After pre-ozonation all of the aldehydes and ketones reached the maximum concentration. On the contrary, results show that the coagulation-filtration process was beneficial to the removal of aldehydes and ketones. Also, the results indicated that the level of aldehydes was increased after post chlorination. The percent increase was 52.3, 34.6, 12.1, 26.8 and 38% for formaldehyde, acetaldehyde, glyoxal, methyl glyoxal and glyoxalic acid, respectively, in September. Therefore, final chlorination led to increase in the formation of aldehydes in the pre-ozonated water. Ketones were not detected in the post-chlorinated water. Moreover, there was no correlation between total organic carbon (TOC) and total aldehyde and total ketone in water samples.&nbsp;</p> </div> <p>&nbsp;</p>

scholarly journals Analysis of Water Treatment Plant Operation in Ilijaš Municipality

2021 ◽  
Vol 73 (02) ◽  
pp. 153-163
Author(s):  
Stjepan Lakusic
Keyword(s):  
Water Treatment ◽  
Water Samples ◽  
Settling Tank ◽  
Treatment Plant ◽  
Water System ◽  
Water Treatment Plant ◽  
Operating Efficiency ◽  
Second Line ◽  
First Line ◽  
Efficient Operation

The operation of the Karašnica Water Treatment Plant, forming part of the water system in Ilijaš Municipality, in Bosnia and Herzegovina, is analysed in the paper. Two distinct water treatment lines are described and analysed. The first line consists of an internal circular settling tank and rapid sand gravity filters, while the second line consists of an external circular settling tank and pressure filters. In order to evaluate operating efficiency, a tour of the system facilities was made, interviews with the employees were conducted, the existing documentation was examined, and additional physicochemical and bacteriological analyses of appropriate water samples were conducted. Following analysis of all available data, appropriate conclusions and significant recommendations were made toward more efficient operation of the water treatment plant.

scholarly journals Investigation of water quality changes in drinking water supplied from Sitlee water treatment plant on River Tawi to Old Jammu City, Jammu, J&K, India

2018 ◽  
Vol 10 (2) ◽  
pp. 601-607
Author(s):  
Poonam Kundan ◽  
Deepika Slathia
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Water Samples ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Quality Parameters ◽  
Faecal Coliform ◽  
Quality Changes ◽  
Distribution Point

In the present study, an attempt has been made to evaluate the water quality changes in River Tawi water treated at Sitlee water treatment plant, and supplied for drinking to Old Jammu City, Jammu, J&K, India. Water samples from the treated water unit of Sitlee water treatment plant and around ten houses from the distribution point (Old Jammu City) were analyzed monthly for various physicochemical parameters for a period of one year (February 2014 to January 2015). The study indicated deterioration of drinking water quality during its passage through the distribution network which has been attributed to the leakages and defects in the old pipe system supplying water to the Jammu city. Comparison of analyzed water quality parameters with the drinking water standards prescribed by World Health Organization (WHO) and Bureau of Indian Standards (BIS) indicated that parameters like DO (7.49-8.24mg/l), calcium(49.93-67.08mg/l), magnesium(16.14-25.21mg/l) and potassium(6.99-7.93mg/l) were almost nearing the desirable limits but were within the permissible limits and parameters like turbidity(3.5-8.17 NTU) and total hardness(78.87-120.50mg/l) were above the desirable limits in the water samples collected from the distribution point. The collected primary data for the thirteen water quality parameters has been used to calculate the Arithmetic Water Quality Index(WQI) which has shown monsoon increase with higher values at distribution point(65.65). One time microbial analysis (MPN/100ml) for total and faecal coliform has indicated presence of faecal coliform (<1/100ml) in water samples from eight households at distribution point which indicates contamination of water with human faecal matter during its passage through the distribution network. According to microbial standards laid down by Central Pollution Control Board (2008), water contaminated with faecal coliform is unfit for drinking without conventional treatment.

Identification of Pathogenic Bacteria Isolated from Raw and After Sand Filtration Water at Lubok Buntar Water Treatment Plant

2017 ◽  
Vol 14 (1) ◽  
pp. 41
Author(s):  
Nur Hafizah Zakaria ◽  
Husnul Azan Tajarudin ◽  
Mohd Sharizal Mohd Sapingi ◽  
Mohamad Fared Murshed
Keyword(s):  
Water Treatment ◽  
Dna Sequences ◽  
Pathogenic Bacteria ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Local Alignment ◽  
Sand Filtration ◽  
Before And After ◽  
Serial Samples

This study focused on the identification of pathogenic bacteria in raw water intake and after sand filtration for drinking water treatment plant during flood event in 2014. The samples was collected from the Lubok BuntarWater Treatment Plant (WTP) and processed through bacterial isolation using chocolate agar as a media. The isolation process conducted based on serial samples dilution and streaking method prior to DNA extraction.Deoxyribonucleic acid (DNA) extraction kit was used to get selected bacteria DNA and further analysis using Polymerase Chain Reaction (PCR) test and electrophoresis to get DNA sequences. The Basic Local Alignment Search Tool (BLAST) analysis was employed to identify the species of the isolated bacteria. As a result, Pantoeaagglomerans and Enterobacter sp. were found in raw and filtered water sample and indicating the same family types. It was concluded that bacteria of the same species were found before and after sand filtration and need to be removed by disinfectant process. The findings also indicated that all the physicochemical parameters measured were within the values prescribed by the Interim National Water QualityStandard (INWQS).

scholarly journals Efficiency of Traditional Water Treatment Plant and Compact Units in Removing Viruses

2015 ◽  
Vol 3 (3) ◽  
pp. 528-536
Author(s):  
Yehia A. Osman ◽  
Waled M. El-Senousy ◽  
Adel A. El-Morsi ◽  
Mohammed K. Rashed
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Samples ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Fecal Bacteria ◽  
Rt Pcr ◽  
Drinking Waters ◽  
Pollution Indicator ◽  
Drinking Water Samples

The fecal bacteria have been taken as the gold standard for water industry. However, the spread of viral gastroenteritis due to drinking water have given a momentum to a recent push by microbiologists to consider viruses as important pollution indicator as fecal bacteria. Therefore, we designed a study to evaluate the efficiency of two types of water purification systems: the traditional water treatment plant and two types compact units. Both systems produced drinking waters free of bacteria, chemical contaminants and mostly viruses free.  However, recent advances in molecular biology techniques, such as RT-PCR have detected Rotaviruses in chlorinated drinking waters resulted from all systems. The frequency of Rotaviruses since October 2010 till September 2012 in Shark El-Mansoura WTP in drinking water samples was 12.5% similar to raw water. While the compact unit at Depo Awam (American design) the frequency of Rotavirus was 16.6% in both raw and drinking water samples.  On the other hand the virus frequency in the raw and drinking water sample in El-Danabik unit (Egyptian design) were 12.5% and 4.16% respectively. Signifying failure of the chlorination process in removing viruses completely.  However, detection of Rotavirus genome in the drinking water samples does not means the presence of its infectivity. The infectious ability of the rotaviruses was confirmed by CC-RT-PCR in all positive samples, where viral RNA was not detected in the collected drinking water samples.  In conclusion RT-PCR and CC-RT-PCR techniques high lightened the need to include viruses as mandatory pollution indicator in water treatment plants. Int J Appl Sci Biotechnol, Vol 3(3): 528-536

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