An algal monitoring protocol: the strategic link between reservoir and treatment process

1998 ◽  
Vol 37 (2) ◽  
pp. 153-159 ◽  
Author(s):  
Machiel C. Steynberg ◽  
K. Adam ◽  
A. J. H. Pieterse

Eutrophication as well as the removal of algae by the drinking water industry received dedicated attention in past three decades. An interdisciplinary approach will assist catchment and water purification managers to work to the same future – algal blooms in reservoirs dominated by the “ideal algae” which can be removed by conventional unit treatment processes. This paper will provide a futuristic picture of resource and product quality management, based on a historic perspective of eutrophication and algal removal research.

1999 ◽  
Vol 40 (6) ◽  
pp. 153-163 ◽  
Author(s):  
M. J. McGuire

There have been significant advances in the development and application of treatment processes to control off-flavor problems in drinking water in the past few years. This paper updates two major treatment process summaries that appeared in 1988 and 1995. The paper also puts the efficiencies of the treatment processes in perspective by using the drinking water flavor wheel as a reference point. Removal or control of classes of off-flavor problems are described in relation to the categories on the wheel. Specifically, processes such as oxidation, adsorption, biological treatment and membranes are described. The recent literature is reviewed and advances in treatment are identified. A new treatment process for controlling nitrification in distribution systems is introduced which has the potential to dramatically reduce the problems of chlorinous odor complaints from customers.


2007 ◽  
Vol 55 (5) ◽  
pp. 203-208 ◽  
Author(s):  
B.U. Bae ◽  
H.S. Shin ◽  
J.J. Choi

This paper reviews taste and odour (T&O) issues of South Korea's water industry. For this purpose, an overview of the water supply systems and drinking water standards is presented and some results from citizen surveys for customer satisfaction are included. A case study is presented in which the water intake was shifted from inside a main reservoir to a downstream location due to T&O problems. It is true that the South Korean water industry has long relied on the tolerance of consumers for periodic T&O events. Recently the South Korean water industry has become aware that the T&O problems are at the centre of consumers' concerns and has taken several positive approaches. These include monitoring T&O events using sensory and instrumental methods, installation of a baffled-channel PAC contactor and application of advanced water treatment processes.


2016 ◽  
Vol 17 (3) ◽  
pp. 870-878
Author(s):  
Yue Zhang ◽  
Sen Peng ◽  
Xin-hua Zhao

Research into natural organic matter (NOM) removal in drinking water treatment processes is mostly independent, distributed, disconnected and unable to meet the needs of technology application; therefore, an assessment of the value of NOM treatment processes is necessary. In this paper, a hybrid evaluation model based on rough set theory and a matter-element model was used to evaluate the value of eight NOM removal processes. The counting process of the weighting factor did not include any subjective information which avoided the artificial factor deviation and made the evaluation more objective. The result indicated that in addition to the MIEX + coagulation + sedimentation + filtration (MCSF) treatment process, the rest of the NOM treatment processes had a certain value; the coagulation + sedimentation + filtration + adsorption (CSFA) and coagulation + sedimentation + filtration + membrane (CSFM) treatment processes had the highest values which meant that these treatment processes could remove the NOM in drinking water effectively. It also illustrated that the coagulation + sedimentation + adsorption + membrane (CSAM) treatment process had high feasibility, which has important significance for guaranteeing the safety of drinking water.


2021 ◽  
Vol 1 (1) ◽  
pp. 53-60

The present study aimed to investigate the quality of drinking water and assessment the current situations from different wells before and after water treatment at east Libya in Tobruk city away from the Egyptian border by 150 kilometers. by measuring some chemical elements such as ph, EC, TDS, Na, K, Ca Cl and Nacl The samples was carried out during the December. Tennty water samples were collected mainly from ten locations. The determined types of bacteria in water and chemicals parameter comparing the result with (WHO2011), The present study showing that there are E-Coli bacteria in some wells before treatment process and after treatment was free of Bacteria It is clear of the data result from chemicals parameter was reduce of numbers of salts in all stations by using treatment processes and the higher value was shoeing in /well number 10 and all chemicals result before treatment was higher than the permissible limits of (WHO2011) for Libya


2020 ◽  
Author(s):  
Catherine Moody

<p>Peatlands export large quantities of dissolved organic matter (DOM) into surface waters. The characteristics of the peatland (e.g. vegetation cover, scale, land use) effect the concentration and composition of DOM in the water. In the UK, water companies use surface water from peatlands as a source of drinking water, and the efficiency of the treatment process depends on the concentration and composition of DOM in the incoming water. In order to better understand the link between peatland characteristics and water treatment efficiency, the composition and concentration of DOM in surface waters draining peatlands across the UK was investigated. Water samples were collected from peatland surface waters from over 300 sites across the UK. Sites with different land uses, vegetation cover, management regimes and restoration states were included.</p><p>The DOM was extracted from the water and analysed, to determine the elemental composition of the DOM. In future, targeted restoration and revegetation of peatlands could be used to alter the composition of DOM in the surface water, to produce DOM that can be more easily treated for drinking water, or treatment processes can be improved to increase treatment efficiency, based on a better understanding of the composition of DOM.</p>


2011 ◽  
Vol 335-336 ◽  
pp. 1381-1384
Author(s):  
Bin Guo Zheng ◽  
Wei Gong Peng ◽  
Ji Biao Zhang ◽  
Zheng Zheng

Harmful algal blooms have long been an issue worldwide owing to their adverse effects on drinking water treatment processes as well as drinking water quality. In this paper, chitosan-bentonite compound material was prepared by the supporting of chitosan on pillared bentonite and used for removal of harmful algae from water. The results showed that the compound material was effective for the removal of cyanobacterial Microcystis aeruginosa.


1998 ◽  
Vol 37 (2) ◽  
pp. 361-368
Author(s):  
Chris Stretton

Until recently the development of forestry sites in the United Kingdom paid little regard for their impact on the aquatic environment, with the result that there have been several instances of major damage to drinking water reservoirs, two of which are described briefly. In order to improve the formal planning of future forestry work the water industry initiated development of a joint Working Group, with the objective of producing Guidelines for use throughout the forest industry. Development of these Guidelines are described, as is the basic content of the final document which now forms an important reference work for the industry, both for the development of new forest sites and for restocking following felling of the first rotation. Concerns remain regarding the continuing management of sites, particularly with regard to artificial fertilisation and its potential to encourage algal blooms in standing waters: close liaison will be necessary between water and forestry interests.


Shore & Beach ◽  
2020 ◽  
pp. 34-43
Author(s):  
Nicole Elko ◽  
Tiffany Roberts Briggs

In partnership with the U.S. Geological Survey Coastal and Marine Hazards and Resources Program (USGS CMHRP) and the U.S. Coastal Research Program (USCRP), the American Shore and Beach Preservation Association (ASBPA) has identified coastal stakeholders’ top coastal management challenges. Informed by two annual surveys, a multiple-choice online poll was conducted in 2019 to evaluate stakeholders’ most pressing problems and needs, including those they felt most ill-equipped to deal with in their day-to-day duties and which tools they most need to address these challenges. The survey also explored where users find technical information and what is missing. From these results, USGS CMHRP, USCRP, ASBPA, and other partners aim to identify research needs that will inform appropriate investments in useful science, tools, and resources to address today’s most pressing coastal challenges. The 15-question survey yielded 134 complete responses with an 80% completion rate from coastal stakeholders such as local community representatives and their industry consultants, state and federal agency representatives, and academics. Respondents from the East, Gulf, West, and Great Lakes coasts, as well as Alaska and Hawaii, were represented. Overall, the prioritized coastal management challenges identified by the survey were: Deteriorating ecosystems leading to reduced (environmental, recreational, economic, storm buffer) functionality, Increasing storminess due to climate change (i.e. more frequent and intense impacts), Coastal flooding, both Sea level rise and associated flooding (e.g. nuisance flooding, king tides), and Combined effects of rainfall and surge on urban flooding (i.e. episodic, short-term), Chronic beach erosion (i.e. high/increasing long-term erosion rates), and Coastal water quality, including harmful algal blooms (e.g. red tide, sargassum). A careful, systematic, and interdisciplinary approach should direct efforts to identify specific research needed to tackle these challenges. A notable shift in priorities from erosion to water-related challenges was recorded from respondents with organizations initially formed for beachfront management. In addition, affiliation-specific and regional responses varied, such as Floridians concern more with harmful algal blooms than any other human and ecosystem health related challenge. The most common need for additional coastal management tools and strategies related to adaptive coastal management to maintain community resilience and continuous storm barriers (dunes, structures), as the top long-term and extreme event needs, respectively. In response to questions about missing information that agencies can provide, respondents frequently mentioned up-to-date data on coastal systems and solutions to challenges as more important than additional tools.


1983 ◽  
Vol 15 (S2) ◽  
pp. 95-101 ◽  
Author(s):  
E T Gjessing

For several reasons the surface waters in cold climate areas are coloured due to humic substances. There are two major objections against humus in drinking water, the first is concerned with aesthetical and practical problems and the second is due to indirect negative health effects. There are essentially three different methods in use today for the removal or reduction of humus colour in water: (1) Addition of chemicals with the intention of reducing the “solubility”, (2) Addition of chemicals in order to bleach or mineralize the humus, and (3) Filtration with the intention of removal of coloured particles and some of the “soluble” colour. The treatment processes are discussed.


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