Safeguarding the microbial water quality from source to tap

AbstractAnthropogenic activities and climate change can deteriorate the freshwater quality and stress its availability. This stress can, in turn, have an impact on the biostability of drinking water. Up to now, the microbiological quality of drinking water has been maintained through the selection of high-quality water sources allied to the use of disinfectants and the removal of organic carbon. But as freshwater becomes richer in other nutrients, strategies used so far may not suffice to keep a steady and high-quality supply of drinking water in the future. This article readdresses the discussion on drinking water biostability. We need to reframe the concept as a dynamic equilibrium that considers the available nutrients and energy sources (potential for growth) relative to the abundance and composition of the bacterial community (potential to consume the available resources).

Download Full-text

Appraisal of Microbiological Quality of Food with Respect to Drinking Water in Punjab

Indian Journal Of Applied Research ◽

10.15373/2249555x/june2014/199 ◽

2011 ◽

Vol 4 (6) ◽

pp. 1-3

Author(s):

Pandove G Pandove G ◽

◽

Sahota S Sahota S

Keyword(s):

Drinking Water ◽

Microbiological Quality ◽

Quality Of Food

Download Full-text

Microbiological quality of residues from drinking water preparation

Water Science & Technology ◽

10.2166/wst.1995.0565 ◽

1995 ◽

Vol 31 (5-6) ◽

pp. 75-79 ◽

Cited By ~ 5

Author(s):

M. Würzer ◽

A. Wiedenmann ◽

K. Botzenhart

Keyword(s):

Waste Water ◽

Escherichia Coli ◽

Pseudomonas Aeruginosa ◽

Drinking Water ◽

Water Treatment ◽

Pathogenic Bacteria ◽

Waste Water Treatment ◽

Microbiological Quality ◽

Detection Limits

In Germany the application of procedures such as flocculation and filtration in the preparation of drinking water results in the annual production of an estimated 500,000 t of sediments and sludges. Some of these residues have a potential for being reused, for example in agriculture, forestry, brickworks or waste water treatment. To assess the microbiological quality of residues from waterworks methods for the detection of enterobacteria, Escherichia coli, Salmonella, Pseudomonas aeruginosa, Legionella, poliovirus, Ascaris suis eggs and Cryptosporidium have been evaluated regarding their detection limits and were applied to various residues from German waterworks. Results show that sediments and sludges may contain pathogenic bacteria, viruses and protista. When residues from waterworks are intended to be reused in agriculture or forestry the microbiological quality should therefore be considered.

Download Full-text

The possibility of using lactic additives and sonochemical technology in the production of preserves

E3S Web of Conferences ◽

10.1051/e3sconf/202016406012 ◽

2020 ◽

Vol 164 ◽

pp. 06012

Author(s):

Vera Demchenko ◽

Irina Asfondiarova ◽

Nina Katkova ◽

Marina Ivanova ◽

Elena Belokurova

Keyword(s):

Ultrasonic Treatment ◽

Storage Temperature ◽

Food Additives ◽

Microbiological Quality ◽

Point Scale ◽

Resource Saving ◽

High Quality ◽

Processing Power ◽

Fish Product

The priority in improving the existing methods of processing fish is salting with the use of food additives with different functional orientations. The aim of the study was the development of preserves with the introduction of lactate-containing additives and using sonochemical technologies; examination of the quality of the products obtained according to organoleptic and microbiological safety indicators. The article proposes a resource-saving technology for the production of fish products with prolonged shelf life due to the use of a complex food additive consisting of lactic, acetic, propionic acids and their salts in different proportions with subsequent ultrasonic treatment using the ultrasonic generator of the Wave series model UZTA-0 2/22-OM. There was established the optimal mode of using the ultrasonic processing power of 75 W / m2 in the manufacture of fish preserves from herring. Organoleptic and microbiological quality indicators were studied during storage of preserved products with the addition of additives and ultrasonic treatment compared to the control. Organoleptic assessment was carried out on a five-point scale, microbiological indicators were studied by standard methods. The Dilactin Forte Plus dietary supplement in the composition of preserves in the amount of 3% and in combination with the use of sonochemical technologies makes it possible to obtain a safe high-quality fish product. Manufactured preserves at a storage temperature of 0 ± 2 ° C can maintain their high quality for 5 months.

Download Full-text

The Prediction and Evaluation of the Groundwater Quality of Taikang Formation in Tertiary in West of Daqing Oilfield by Using Resistivity Logging Data

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.726-731.3538 ◽

2013 ◽

Vol 726-731 ◽

pp. 3538-3541

Author(s):

Kun Xiao ◽

Chang Chun Zou ◽

Biao Xiang

Keyword(s):

Drinking Water ◽

Groundwater Quality ◽

Total Dissolved Solids ◽

Formation Water ◽

The South ◽

High Quality ◽

Dissolved Solids ◽

Well Location ◽

Resistivity Logging

In order to research the groundwater quality of the Taikang Formation in Tertiary in west of Daqing Oilfield, resistivity logging data of 140 wells in the study area were analyzed to forecast the groundwater total dissolved solids (TDS) distribution of the plane. When the resistivity logging value (Rt) of the Taikang Formation in Tertiary is above 45Ω.m and its corresponding value of Formation water TDS is below 1000 mg/L, the quality of groundwater accords with life standards for drinking. The south area of Hongweixing well area and the east of Xishuiyuan well area, including Ranghulu, Qianjincun, Dulitun and Nanshuiyuan well area are favorable for high quality groundwater. The research provides the evidences to evaluate the groundwater quality in west Daqing Oilfield and determine specific well location, improving the efficiency of exploring the underground drinking water.

Download Full-text

GENETIC VARIATION OF HUMPBACK GROUPER (Cromileptes altivelis) ON F1 AND F3 GENERATIONS

Jurnal Ilmu dan Teknologi Kelautan Tropis ◽

10.29244/jitkt.v5i1.7755 ◽

2013 ◽

Vol 5 (1) ◽

Author(s):

Sari Budi Moria Sembiring ◽

Tridjoko Tridjoko ◽

Haryanti Haryanti

Keyword(s):

Body Weight ◽

Genetic Variation ◽

Body Length ◽

Quantitative Characteristic ◽

Breeding Program ◽

High Quality ◽

Culture Technology ◽

Selection Of ◽

Rapd Method

Hatchery and culture technology of Humpback grouper has been developed. However, sometimes it is still found constraint in sedd production and caused instability of production due to failure by many factors. Breeding program become necessary to provide seed with high quality and good genetic variation. Quantitative characteristic selection is one of breeding program to improve productivity in grouper aquaculture. The aim of this research was to produce good phenotyphic and genotypic quality of Humpback grouper candidate broodstock. Selection of Humpback grouper F1 and F3 was done based on quantitative characteristic (body length and weight) and genotyphic characteristic by using ramdom amplified polymorphism DNA (RAPD) method. The results of conventional selection were found candidate broodstock of Humpback grouper F1 and F3 with body weight range from 170-210 g and 160-170 g consecutively. Heterozygosity values of Humpback grouper analized by RAPD of F1 and F3 were 0.7940 and 0.7749 consecutively and it was not significantly different. This value emphasis that population of this F3 Humpback grouper was still good to grow for broodstock. Keywords: genetic variation, humpback grouper, F1, F3.

Download Full-text

QUALITY PREDICTION OF DENSE POINTS GENERATED BY STRUCTURE FROM MOTION FOR HIGH-QUALITY AND EFFICIENT AS-IS MODEL RECONSTRUCTION

ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences ◽

10.5194/isprs-archives-xlii-2-w13-95-2019 ◽

2019 ◽

Vol XLII-2/W13 ◽

pp. 95-101

Author(s):

R. Moritani ◽

S. Kanai ◽

H. Date ◽

Y. Niina ◽

R. Honma

Keyword(s):

Structure From Motion ◽

Point Clouds ◽

Quality Prediction ◽

Construction Site ◽

Model Reconstruction ◽

High Quality ◽

Bridge Column ◽

Dense Point ◽

Selection Of

<p><strong>Abstract.</strong> In this paper, we introduce a method for predicting the quality of dense points and selecting low-quality regions on the points generated by the structure from motion (SfM) and multi-view stereo (MVS) pipeline to realize high-quality and efficient as-is model reconstruction, using only results from the former: sparse point clouds and camera poses. The method was shown to estimate the quality of the final dense points as the quality predictor on an approximated model obtained from SfM only, without requiring the time-consuming MVS process. Moreover, the predictors can be used for selection of low-quality regions on the approximated model to estimate the next-best optimum camera poses which could improve quality. Furthermore, the method was applied to the prediction of dense point quality generated from the image sets of a concrete bridge column and construction site, and the prediction was validated in a time much shorter than using MVS. Finally, we discussed the correlation between the predictors and the final dense point quality.</p>

Download Full-text

Microbiological Quality of Drinking Water in Sachets Sold in the City of Yaoundé in Cameroon: Tests of Sensitivity to the Antibiotics of Bacteria Isolated

Journal of Applied Biotechnology ◽

10.5296/jab.v8i1.16684 ◽

2020 ◽

Vol 8 (1) ◽

pp. 27

Author(s):

Nguepidjo Gilbert ◽

Kapso Tchouankep Mireille ◽

Ngong Ankiambom Innocent ◽

Tonmeu Douyong Chimène Sandrine ◽

Enoka Patrice ◽

...

Keyword(s):

Drinking Water ◽

Low Cost ◽

Bacterial Species ◽

Microbiological Quality ◽

Positive Culture ◽

Human Beings ◽

Salmonella Spp ◽

Cross Sectional ◽

The City

Water is the basic drink for human beings and drinking water in sachets is very popular because of its relatively low cost and availability. The aim of this study is to determine the bacteriological profile of sachet drinking water sold in the city of Yaounde. It was a descriptive cross-sectional study covering the period from March to June 2019, carried out in the application laboratory of ETMS-Yaounde. A total of 230 samples of drinking water in sachets purchased in different markets in the city of Yaounde were analyzed using Mac Conkey's flooding method. The identification was done on the API 20 E Gallery and the susceptibility test on Mueller Hinton media. The size of the sample was 230 packaged sachet drinking water and 213 of the 230 revealed 92% of positive culture of germs, and only 17 samples gave a negative culture, at a percentage of 8% of isolated germs. The isolated bacterial species and their respective abundances in samples were Enterobacter gergoviae (3%), Klebsiella pneumoniae (5%), Proteus mirabilis (5%), Serratia fonticola (5%), Salmonella choler arizonae cloacae (8%), Salmonella spp. (8%), Enterobacter cloacae (10%), Staphylococcus aureus (10%), Pseudomonas aeruginosa (18%) and Staphylococcus epidermidis (28%). All these tested germs were resistant to Amoxicillin and Erythromycin and 70% of tested germs were sensitive to Gentamycin. Overall, the results revealed poor microbiological quality of these waters. This exposes consumers to health risks, and it is important to inform and sensitize consumers about the risks involved, to educate producers and to control their activities by the health services.

Download Full-text

MODERN TECHNOLOGIES OF PRELIMINARY WATER PURIFICATION AT RAISED TECHNOGENIC LOADS OF THE WATER SOURCE

URBAN CONSTRUCTION AND ARCHITECTURE ◽

10.17673/vestnik.2013.s4.25 ◽

2013 ◽

Vol 3 (4S) ◽

pp. 93-95

Author(s):

Anna E USYNINA ◽

Ludmila V BORONINA

Keyword(s):

Drinking Water ◽

Water Purification ◽

New Technologies ◽

Water Source ◽

Modern World ◽

High Quality ◽

Technogenic Loads ◽

Treatment Facilities ◽

Modern Technologies

In the modern world indisputable value for the population is represented by qualitative water. The extremely unsatisfactory quality of drinking water is caused by limited opportunities of work of treatment facilities in the conditions of anthropogenous loads of water sources. Search of new technologies of high-quality prewater purifi cation it is extremely necessary.

Download Full-text