scholarly journals Impact of decreasing water demand on bank filtration in Saxony, Germany

2009 ◽  
Vol 2 (2) ◽  
pp. 101-126 ◽  
Author(s):  
T. Grischek ◽  
D. Schoenheinz ◽  
C. Syhre ◽  
K. Saupe
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Water Demand ◽  
Bank Filtration ◽  
Raw Water ◽  
Management Options ◽  
Flow And Transport ◽  
High Degree

Abstract. Bank filtration has been of main importance for the drinking water supply in Germany for many decades. The water quality of pumped raw water from bank filtration sites depends to a high degree on the water quality of the infiltrating surface water and the landside groundwater, the mixing portion of both as well as the flow and transport conditions in the aquifer. Since the improvement of river water quality and a drastic decrease in water demand during the last 15 years in Germany, the influence of landside groundwater quality has become more important for the raw water quality of waterworks relying on bank filtration. The hydrogeologic analysis of three bank filtration sites in Saxony and the management of abstraction rates and well operation in response to fluctuating water demand are discussed. In conclusion, a general overview on management options for bank filtration sites is provided.

scholarly journals Impact of decreasing water demand on bank filtration in Saxony, Germany

2010 ◽  
Vol 3 (1) ◽  
pp. 11-20 ◽  
Author(s):  
T. Grischek ◽  
D. Schoenheinz ◽  
C. Syhre ◽  
K. Saupe
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Groundwater Quality ◽  
Water Demand ◽  
Bank Filtration ◽  
Raw Water ◽  
Flow And Transport ◽  
High Degree

Abstract. Bank filtration has been of great importance to the drinking water supply in Germany for many decades. The water quality of pumped raw water from bank filtration sites depends to a high degree on the water quality of the infiltrating surface water and the landside groundwater, the mixed portion of both, as well as the flow and transport conditions in the aquifer. Following the improvement of river water quality and a drastic decrease in water demand during the last 20 years in Germany, the influence of landside groundwater quality has become more important for the raw water quality of waterworks relying on bank filtration. The hydrogeologic analysis of three bank filtration sites in Saxony and the management of abstraction rates and well operation in response to fluctuating water demand are discussed.

Coagulation of Two Different Kinds of Surface Water before Inlet into Lakes to Improve the Self-Purification Process

1987 ◽  
Vol 19 (5-6) ◽  
pp. 803-812 ◽  
Author(s):  
C. van der Veen ◽  
A. Graveland ◽  
W. Kats
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Substantial Effect ◽  
Quality Parameters ◽  
Subsequent Treatment ◽  
Water Demands ◽  
Set Up ◽  
High Degree

Part of the drinking water demands of the city of Amsterdam and the surrounding district are met by abstraction from nearby Lake Loenderveen that is fed by two different kinds of surface water. The lake itself is subject to rainfall, evaporation and seepage. It acts partly as a stockpiling reservoir (about 2 weeks) and partly as a self-purifying medium (retention time about 100 days). The design and management of the lake are such that a high degree of mixing of the inflowing water is obtained and an almost constant water quality, which greatly facilitates subsequent treatment to obtain high quality drinking water. To combat eutrophication the nutrient-containing water that enters the lake is dephosphated. After a number of years working with an experimental and simplified method in the lake itself, a highly efficient new coagulation and settling plant was constructed. This has been in operation since 1984. The improvements in the quality of the lake water are discussed in this paper. In addition to a considerable reduction in the phosphate content (and that of other nutrients), improvements were registered in a number of other water quality parameters (DOC, heavy metals, colour c.a.). A similar coagulation and settling system is also used to treat one kind of surface water that is fed into the adjacent Loosdrecht Lakes during dry summer spells. These lakes are of great environmental importance; they are also unique features of the landscape. Pretreatment of the water that flows into the lakes has a substantial effect on the water quality. A monitoring system has been set up to check the resulting improvement.

scholarly journals Quality of Surface Water and Groundwater in Iraq

2020 ◽  
pp. 161-199
Author(s):  
Nadhir Al-Ansari ◽  
Sabbar Saleh ◽  
Twana Abdullahand ◽  
Salwan Ali Abed
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Water Resources ◽  
Middle East ◽  
Human Life ◽  
Water Levels ◽  
Aquifer System ◽  
Surface Water And Groundwater

Insufficiency of water resources in the Middle East Region represents vital factors that influence the stability of the region and its progress. Expectations indicate that the condition will be dimmer and more complicated, especially in Iraqi territory. Iraq, which is situated in the Middle East, it covers an area of 433,970 square kilometers and populated by about 32 million inhabitants. Iraq greatly relies in its water resources on the Tigris and Euphrates Rivers as a surface water resources, and several productive groundwater aquifers in which from the hydrogeological point of view divided into several major aquifer units including Foothill, Al-Jazira, Aquifer System, Mandali-Badra-Teeb, Mesopotamian and Desert Aquifer system. Recently, Iraq is suffering from water shortage problems. This is due to external and internal factors affecting the water quality of water resources; they are controlled and uncontrolled factors. The uncontrolled factors are climate change and its consequences, such as reduction of precipitation and temperature increasing. The controlled factors have a significantly negative influence on water resources, but their effects involve more specific regions. The controlled factors are mainly represented by building dams and irrigation projects within the upper parts of the Tigris and Euphrates catchments, Al-Tharthar Scheme, waste water, solid wastes and wastes from wars, which has a significant effect on surface water in Iraq because about 80% of the water supply to Euphrates and Tigris Rivers come from Turkey. In addition, the pressures resulting from the high demand for water resources, and the continued decline in their quantity rates have led to major changes in the hydrological condition in Iraq during the past 30 years. The decrease in surface water levels and precipitation during these three decades reflects the drop in the levels of water reservoirs, lakes, and rivers to the unexpected levels. The level of main country’s water source, Tigris, and Euphrates Rivers has fallen to less than a third of its natural levels. As storage capacity depreciates, the government estimates that its water reserves have been reduced precariously. According to the survey from the Ministry of Water Resources, millions of Iraqi people have faced a severe shortage of drinking water. Since of the importance of water for human life and the need to monitor temporal and spatial changes in quality and quantity, there is a need to develop a general Iraqi Water Quality Index (Iraq WQI) to monitor surface water and groundwater and classify it into five categories, very good, good, acceptable, bad and very bad, in terms of suitability for domestics, irrigation and agriculture depending on the Iraqi and WHO standards for drinking water. In addition, strict establishment for the regular quantitative monitoring surface water and groundwater setting and processes. Prospects are more negative for all riparian countries. This implies that solving these problems requires actual and serious international, regional, and national cooperation to set a prudent plan for water resources management of the two basins. Iraq being the most affected country should seriously set a prudent, scientific, and strategic plan for the management and conservation of its water resources. Keywords: Pollution, Water Quality, Waste, Surface water, Groundwater, Iraq.

THE QUALITY OF DRINKING WATER IN SIGHETU MARMAŢIEI, MARAMUREŞ, ROMANIA

2017 ◽  
Vol 31 (2) ◽  
pp. 19-25
Author(s):  
Valeria Mirela Brezoczki ◽  
◽  
Gabriela Maria Filip ◽  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Source ◽  
Raw Water ◽  
Water Quality Control ◽  
Baia Mare ◽  
Drinking Water Distribution

This paper presents the analysis of the quality indicator of a subterranean raw water source, captured in Crăciunesti, Sighetu Marmatiei, followed by the description of the technological flow of capturing and chlorinating water with the aim of making it drinkable, and the analysis of the obtained values of the physical, chemical and bacteriological indicators. The period within which water quality was monitored for this paper covers four months (December 2016, March, April and May 2017). Within this period the analyses regarding water quality control were carried out by the laboratory of the Water Treatment Baia Mare. The analysis of the obtained results highlighted a series of problems regarding the existence of certain indicators/parameters with values above the legally admissible threshold with regard to water quality. The manganese found in raw water exceeds the admissible threshold by 160%, in December 2016, and by 120% in March 2017, but it is within limits during the months of April and May. The occurrence of colonies developed at 37 °C and 22°C in the raw water requires chemical treatment of the raw water aimed at disinfecting it. The parameters of drinking water correspond to the values admissible through the laws in force, the water being distributed to the consumers through the Drinking water distribution system in Sighetu Marmatiei.

scholarly journals Does the recycling of waste streams from drinking water treatment plants worsen the quality of finished water? A case assessment in China

2016 ◽  
Vol 17 (2) ◽  
pp. 597-605
Author(s):  
Zhiquan Liu ◽  
Yongpeng Xu ◽  
Xuewei Yang ◽  
Rui Huang ◽  
Qihao Zhou ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Ammonia Nitrogen ◽  
Raw Water ◽  
Waste Streams ◽  
Filter Backwash Water

The overall purpose was to assess the feasibilities of recycling filter backwash water (FBWW) and combined filter backwash water (CFBWW) in a drinking water treatment plant in south China. The variations of regular water-quality indexes, metal indexes (Al, Mn and Cd), polyacrylamide and disinfection by-product indexes (trihalomethanes and their formation potentials) along with the treatment and the recycling processes were monitored. Results showed the recycling procedure caused increases of turbidity, total solids, ammonia nitrogen (NH3-N), permanganate index (CODMn), and dissolved organic carbon, Al, Mn and Cd concentrations in a mixture of raw water and FBWW or CFBWW compared to those in raw water. However, the recycling procedure had negligible impacts on the qualities of settled water and filtered water because most of the contaminants could be effectively removed by the conventional water treatment process. Although recycling did cause slight increases of NH3-N and CODMn levels in settled water and filtered water, the quality of finished water always conformed to Chinese standards for drinking water quality according to the surveyed indexes in the present study. Thus, it is appropriate to recycle waste streams in water-stressed areas if the source water is well managed and the water treatment processes are carefully conducted.

scholarly journals Diversity and Significance of Mold Species in Norwegian Drinking Water

2006 ◽  
Vol 72 (12) ◽  
pp. 7586-7593 ◽  
Author(s):  
Gunhild Hageskal ◽  
Ann Kristin Knutsen ◽  
Peter Gaustad ◽  
G. Sybren de Hoog ◽  
Ida Skaar
Keyword(s):  
Drinking Water ◽  
Surface Water ◽  
Species Diversity ◽  
Water System ◽  
Fungal Species ◽  
Allergic Reactions ◽  
Raw Water ◽  
Drinking Water System ◽  
Private Homes

ABSTRACT In order to determine the occurrence, distribution, and significance of mold species in groundwater- and surface water-derived drinking water in Norway, molds isolated from 273 water samples were identified. Samples of raw water, treated water, and water from private homes and hospital installations were analyzed by incubation of 100-ml membrane-filtered samples on dichloran-18% glycerol agar. The total count (number of CFU per 100 ml) of fungal species and the species diversity within each sample were determined. The identification of mold species was based on morphological and molecular methods. In total, 94 mold species belonging to 30 genera were identified. The mycobiota was dominated by species of Penicillium, Trichoderma, and Aspergillus, with some of them occurring throughout the drinking water system. Several of the same species as isolated from water may have the potential to cause allergic reactions or disease in humans. Other species are common contaminants of food and beverages, and some may cause unwanted changes in the taste or smell of water. The present results indicate that the mycobiota of water should be considered when the microbiological safety and quality of drinking water are assessed. In fact, molds in drinking water should possibly be included in the Norwegian water supply and drinking water regulations.

scholarly journals On the issue of the Uzbekistan surface water quality assessment

2019 ◽  
Author(s):  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Surface Waters ◽  
Surface Water Quality ◽  
Water Quality Assessment ◽  
Soviet Period ◽  
Hazard Class ◽  
Difficult Situation

The article is devoted to the analysis of the quality of surface water in Uzbekistan. Analyzed their impact on the living conditions and health of the population of the republic. The most difficult situation with drinking water supply and with the growth of diseases caused by the use of poor-quality drinking water falls on the Navoi, Khorezm, Surkhandarya regions and Karakalpakstan. The stated data makes it relevant to conduct research to determine the quality of surface waters and improve the methods of its assessment. The analysis of existing methods for assessing the quality of surface waters. The technique of assessment of the index of pollution of water applied now in Uzbekistan counted in compliance with “Methodical recommendations about the formalized complex evaluation test of the surface and ocean waters about hydro/chemical indexes” was developed in Soviet period and doesn’t meet the modern requirements. The need to improve the methods for assessing the quality of surface waters as compared with that currently used in Uzhydromet is indicated. One of the most promising at present is the “Method of integrated assessment of the degree of contamination of surface waters by hydro/chemical indicators” developed and used in operational practice in Russia. The most informative comprehensive estimat water pollution and the class of water quality. The author proposed methods for assessing the quality of surface waters, the calculation of which is based on the use of a larger amount of initial information and are more reliable than those used. In particular, the proposed methodology for assessing the quality of surface waters, taking into account the hazard class of ingredients.

scholarly journals UJI COBA FILTER KERAMIK DENGAN CAMPURAN SEKAM, BEKATUL, SERBUK GERGAJI dan KOLOID PERAK DALAM PENGOLHAN AIR

2013 ◽  
Vol 11 (1) ◽  
Author(s):  
Slamet Hariyadi ◽  
Margono . ◽  
Didik Sugeng Purwanto
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Pond Water ◽  
Produce Water ◽  
E Coli ◽  
Before And After ◽  
Flow Filtration

Many people commonly are using surface water as the main source for clean and drinking water.Ironically, the quality of surface water decreases from time to time due to domestic and industrialpollution. Earthen pots with colloidal silver applied on their surface created simple coated filters where thesilver coating serves as a disinfectant that render the product water ready for consumption.This is a descriptive pre-experimental research, using one group pretest-posttest design, that isto evaluate water treatment to produce water ready for consumption by analyzing the water quality,before and after treatment with the unit, especially with regard to physical and microbioloqical parametersaccording to PERMENKES/N0.492/ MENKES/PER/IV/2010re: drinking water quality requirements.Measurements indicated that pottery filter with a mixture of clay-bran 40% is fastest flowfiltration flow filtration, which meant 5 liters of filtrate out in 21 minutes. Meanwhile a mixture clay-wood20% with an average flow of (Q) 0.254 It / jm was slowest.However clay-rice bran mixture 20% was themost is stable. Result of microbiological examination on pond water (raw condition) indicated a Coli MPNIndex of >2400, and E Coli index of 1600. After filtration with six pots coated with colloidal silversignificant reduction ini microbiological parameter was observed, indicated by MPN. Coliand E Coli indicesof O. Initial (physical) condition of the pond water have indicated no odour, no colour, no taste, and theturbidity level was 11.78 NTU, TDS level was 142mg/L, temperature was 27°C and pH 5.5. After passingthrough six filter pots coated with silver colloids, physicsl parameter i.e. TDS and turbidity decreased, andpH was normal.With respect to Permenkes No. 416/1990 and Permenkes No. 492/2010 on requirements forpotable water and drinking water respectively, suggestion for follow up research on filter pots coated withcolloidal silver pertaining to the chemistry parameters.Keywords: clay pot tilters, colloidal sitver. Coliform, TDS, turbidity, pH, cotor; temperature,odour and taste.

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