Evaluating the potential of biofilm control in water supply systems by removal of phosphorus from drinking water

2007 ◽  
Vol 55 (8-9) ◽  
pp. 211-217 ◽  
Author(s):  
Jānis Rubulis ◽  
Tālis Juhna
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Correlation Coefficient ◽  
Water Distribution ◽  
Water Distribution Network ◽  
Plate Count ◽  
Available Phosphorus ◽  
Water Supply Systems ◽  
Biofilm Development ◽  
Supply Systems

Effect of microbially available phosphorus (MAP) on biofilm development in drinking water systems was investigated at the pilot-scale experiments over 3 years. Completely mixed biofilm reactors Propella® (water detention time 24 h, flow rate 0.25 m s−1, PVC pipe coupons) were used as water distribution network models. Four experimental runs were carried out with water containing different levels of phosphorus which was limiting nutrient for bacterial growth. Positive correlation between MAP in the inlet water and heterotrophic plate count (correlation coefficient 0.95) in biofilm, as well as for the total bacteria number (correlation coefficient 0.71), was observed. However, our experiments showed that removal of phosphorus down to very low levels (below detection limits of chemical method and MAP < 1 μg L−1) was not an efficient strategy to eliminate bacterial regrowth and biofilm formation (<51,00,000 cells/cm2) in drinking water supply systems.

scholarly journals GIS use of Land Use/Land Cover layers and historical data for water losses indices

2019 ◽  
Vol 85 ◽  
pp. 07009
Author(s):  
Alexandru Aldea ◽  
Mihaela Aldea ◽  
Sorin Perju
Keyword(s):  
Water Supply ◽  
Water Distribution ◽  
Historical Data ◽  
Water Distribution Network ◽  
Distribution Networks ◽  
Water Supply Systems ◽  
Land Use Land Cover ◽  
Water Losses ◽  
Decision Factors ◽  
Supply Systems

The population growth and/or its use and development of the land is a continuous preoccupation of the decision factors regarding the water supply system in general and the development of the potable water distribution networks in particular. This issue is even more critical especially in the areas of big cities and important urban growing. As the urbanization of land outgrows the existing water supply systems, one of the possible solutions is to expand the water distribution network in order to cover this urban growth. The present paper analyses further the possibilities to define and use certain indices of urban development together with water loss indices in order to determine trends or issues related with the provision of water supply services and connectivity.

Contamination potential of drinking water distribution network biofilms

2004 ◽  
Vol 49 (11-12) ◽  
pp. 277-286 ◽  
Author(s):  
J. Wingender ◽  
H.-C. Flemming
Keyword(s):  
Drinking Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution Network ◽  
Galvanized Steel ◽  
Detection Methods ◽  
Coliform Bacteria ◽  
Plate Count ◽  
Drinking Water Distribution ◽  
Biofilm Development

Drinking water distribution system biofilms were investigated for the presence of hygienically relevant microorganisms. Early biofilm formation was evaluated in biofilm reactors on stainless steel, copper, polyvinyl chloride (PVC) and polyethylene coupons exposed to unchlorinated drinking water. After 12 to 18 months, a plateau phase of biofilm development was reached. Surface colonization on the materials ranged between 4 × 106 and 3 × 107 cells/cm2, with heterotrophic plate count (HPC) bacteria between 9 × 103 and 7 × 105 colony-forming units (cfu)/cm2. Established biofilms were investigated in 18 pipe sections (2 to 99 years old) cut out from distribution pipelines. Materials included cast iron, galvanized steel, cement and PVC. Colonization ranged from 4 × 105 to 2 × 108 cells/cm2, HPC levels varied between 101 and 2 × 105 cfu/cm2. No correlation was found between extent of colonization and age of the pipes. Using cultural detection methods, coliform bacteria were rarely found, while Escherichia coli, Pseudomonas aeruginosa and Legionella spp. were not detected in the biofilms. In regular operation, distribution system biofilms do not seem to be common habitats for pathogens. However, nutrient-leaching materials like rubber-coated valves were observed with massive biofilms which harboured coliform bacteria contaminating drinking water.

scholarly journals STRATEGI PENGAWASAN PENYEDIAAN AIR MINUM DALAM RANGKA EFEKTIVITAS PEMANFAATAN SUMBER DAYA ALAM

2017 ◽  
Vol 6 (2) ◽  
pp. 54-72
Author(s):  
Lina Lina
Keyword(s):  
Drinking Water ◽  
Rural Communities ◽  
Water Supply ◽  
Poverty Reduction ◽  
Water Distribution ◽  
Water Discharge ◽  
Shared Responsibility ◽  
Drinking Water Supply ◽  
Water Supply Systems ◽  
Supply Systems

The water sector is a public service which has close links with poverty reduction. Inadequate infrastructure and facilities for drinking water and sanitation, especially in rural and suburban areas (peri-urban) adversely affect the health and environmental conditions that have a continuing impact on the level of the family economy. Provision of drinking water infrastructure and improved sanitation will have an impact on improving the quality of the environment and public health, and time can be saved from efforts to obtain drinking water and good sanitation. The third impact will further impact the community in the form of increased productivity. Theaim of this study include(1.) To determine the effectiveness of the management of drinking water supply systems in rural communities basedPamsimas receiver in the district. (2.) To find out the various components that can affect the effectiveness of water supply systems in rural communities based mimum Pamsimas receiver in the district. The method used in this is for descriptive theoretical research.conclusionIf the drinking water supply control strategies implemented in accordancewith                thefunctionmanajememenuseofnatural resourceswill be effective in order to meet the water needs of the community . From the results of this study should be carried out supervisory functions of planning to terbangunya means awall should start from the village level to the district level (government departments associated with drinking water peyediaan). Water Agency business does not just manage the financial system alone , fermented well functioning and sustainability of facilities ( From spring to prime the public water distribution ) . Management of the environment is also a shared responsibility of theuser and BPSPM Preferably in the springs need for regular supervision so awake kelestarianya sehinngga water discharge can be maintained.

Methodological Approaches to Organization of Drinking Water Quality Monitoring Programs

2020 ◽  
pp. 4-8
Author(s):  
Yu.A. Novikova ◽  
I.O. Myasnikov ◽  
A.A. Kovshov ◽  
N.A. Tikhonova ◽  
N.S. Bashketova
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Supply ◽  
Cold Water ◽  
Water Quality Monitoring ◽  
Drinking Water Quality ◽  
Quality Monitoring ◽  
Water Supply Systems ◽  
Monitoring Programs ◽  
Supply Systems

Summary. Introduction: Drinking water is one of the most important environmental factors sustaining life and determining human health. The goal of the Russian Federal Clean Water Project is to improve drinking water quality through upgrading of water treatment and supply systems using advanced technologies, including those developed by the military-industrial complex. The most informative and reliable sources of information for assessing drinking water quality are the results of systematic laboratory testing obtained within the framework of socio-hygienic monitoring (SGM) and production control carried out by water supply organizations. The objective of our study was to formulate approaches to organizing quality monitoring programs for centralized cold water supply systems. Materials and methods: We reviewed programs and results of drinking water quality laboratory tests performed by Rospotrebnadzor bodies and institutions within the framework of SGM in 2017–2018. Results: We established that drinking water quality monitoring in the constituent entities of the Russian Federation differs significantly in the number of monitoring points (566 in the Krasnoyarsk Krai vs 10 in Sevastopol) and measured indicators, especially sanitary and chemical ones (53 inorganic and organic substances in the Kemerovo Region vs one indicator in the Amur Region). Discussion: For a more complete and objective assessment of drinking water quality in centralized cold water supply systems, monitoring points should be organized at all stages of water supply with account for the coverage of the maximum number of people supplied with water from a particular network. Thus, the number of points in the distribution network should depend, inter alia, on the size of population served. In urban settlements with up to 10,000 inhabitants, for example, at least 4 points should be organized while in the cities with more than 3,000,000 inhabitants at least 80 points are necessary. We developed minimum mandatory lists of indicators and approaches to selecting priority indices to be monitored at all stages of drinking water supply.

scholarly journals Microbial diversity in full-scale water supply systems through sequencing technology: a review

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25484-25496
Author(s):  
Wei Zhou ◽  
Weiying Li ◽  
Jiping Chen ◽  
Yu Zhou ◽  
Zhongqing Wei ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Microbial Diversity ◽  
Full Scale ◽  
Water Supply Systems ◽  
Sequencing Technology ◽  
Supply Systems

Drinking water microbial diversity influence in full-scale water supply systems.

scholarly journals Water contamination events in UK drinking-water supply systems

2008 ◽  
Vol 6 (S1) ◽  
pp. 21-26 ◽  
Author(s):  
John Gray
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Water Supply Systems ◽  
Water Company ◽  
Health Authorities ◽  
The Uk ◽  
Contamination Events ◽  
Supply Systems

Water supply companies in the UK have a duty under prime UK legislation to notify the Drinking Water Inspectorate of events affecting or potentially affecting the quality of drinking-water supplies. Under the same legislation, the Inspectorate has a duty to investigate each event. After assessing all of the information available, including companies' reports, the Inspectorate advises on the way in which the event was handled and whether any statutory requirements were contravened. If appropriate, a prosecution of the water company may be initiated. Copies of the assessment are sent to the water company, relevant local and health authorities, Ofwat (the economic regulator), the regional Consumer Council for Water and any other interested parties, including consumers who request it. Generic guidance may be issued to the industry on matters of wider concern. This paper considers the role of the Inspectorate, the powers available to it and reporting arrangements. An overview is presented of events that occurred between 1990 and 2005 and common features are identified. Causes of different types of event are discussed. The importance of well-established contacts between the various interested parties involved in protecting public health is emphasised through discussion of example incidents.

Sign in / Sign up

Export Citation Format

Share Document