Evaluation of Drinking Water Treatment Technology: An Entropy-Based Fuzzy Application

2006 ◽  
Vol 132 (10) ◽  
pp. 1264-1271 ◽  
Author(s):  
Shakhawat Chowdhury ◽  
Tahir Husain
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Treatment Technology ◽  
Water Treatment Technology

Efficiency of Removal of Iron, Manganese, Ammonium and Organic Matter from Groundwater

2017 ◽  
Author(s):  
Ramunė Albrektienė ◽  
Mindaugas Rimeika
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Organic Compounds ◽  
Quartz Sand ◽  
Drinking Water Treatment ◽  
Ammonium Ions ◽  
Treatment Technology ◽  
Well Field ◽  
Water Treatment Technology ◽  
Iron Manganese

The acceptable concentrations in groundwater are usually in excess of iron, ammonium and manganese. These compounds are inefficiently removed by means of ordinary technologies of ammonium ions, iron and manganese compounds removal from groundwater (water aeration and filtration through granular filter fillings) where groundwater contains high concentrations of organic compounds. Increased concentrations of organic compounds in groundwater occur in well fields where exploited aquifers have contact with surface water wells and are supplemented with water from open water bodies. Such well field is located in the town of Nida (Lithuania). The norms permitted by Council directive 98/83/EC on the quality of water intended for human consumption are exceeded by iron, ammonium, manganese and organic compounds in this well field. The present study examines the efficiency of drinking water treatment technology of three-stage filtration with aeration and insertion of coagulant (polyaluminum chloride) where ammonium ions, iron, manganese and organic compounds are removed from groundwater in an integral manner. Three fillings were used for filtration: quartz sand, zeolite and quartz sand with oxidizing bacteria. The drinking water treatment technology examined removes ammonium ions, iron, manganese and organic compounds from groundwater in an integral manner until the requirements of the norms of directive 98/83/EC are achieved.

scholarly journals Potential Repair of Escherichia coli DNA following Exposure to UV Radiation from Both Medium- and Low-Pressure UV Sources Used in Drinking Water Treatment

2002 ◽  
Vol 68 (7) ◽  
pp. 3293-3299 ◽  
Author(s):  
J. L. Zimmer ◽  
R. M. Slawson
Keyword(s):  
Escherichia Coli ◽  
Drinking Water ◽  
Water Treatment ◽  
Uv Radiation ◽  
Drinking Water Treatment ◽  
Low Pressure ◽  
Plate Count ◽  
Treatment Technology ◽  
Medium Pressure ◽  
Uv Lamp

ABSTRACT The increased use of UV radiation as a drinking water treatment technology has instigated studies of the repair potential of microorganisms following treatment. This study challenged the repair potential of an optimally grown nonpathogenic laboratory strain of Escherichia coli after UV radiation from low- and medium-pressure lamps. Samples were irradiated with doses of 5, 8, and 10 mJ/cm2 from a low-pressure lamp and 3, 5, 8, and 10 mJ/cm2 from a medium-pressure UV lamp housed in a bench-scale collimated beam apparatus. Following irradiation, samples were incubated at 37°C under photoreactivating light or in the dark. Sample aliquots were analyzed for up to 4 h following incubation using a standard plate count. Results of this study showed that E. coli underwent photorepair following exposure to the low-pressure UV source, but no repair was detectable following exposure to the medium-pressure UV source at the initial doses examined. Minimal repair was eventually observed upon medium-pressure UV lamp exposure when doses were lowered to 3 mJ/cm2. This study clearly indicates differences in repair potential under laboratory conditions between irradiation from low-pressure and medium-pressure UV sources of the type used in water treatment.

scholarly journals Application of microfiltration–nanofiltration combined technology for drinking water advanced treatment in a large-scale engineering project

2021 ◽  
Author(s):  
Mu Liu ◽  
Shaohua Wang ◽  
Tongchun Wang ◽  
Mengyuan Duan ◽  
Yingqiang Su ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Large Scale ◽  
Removal Rate ◽  
Drinking Water Treatment ◽  
Advanced Treatment ◽  
Treatment Technology ◽  
Engineering Project ◽  
Pilot Testing ◽  
Water Plant

Abstract By analyzing and comparing the pressurized-pot microfiltration (MF) system and the ultrafiltration membrane as the pretreatment technology of the nanofiltration (NF) system through pilot testing, the research demonstrates the feasibility of combined technology of NF with pressurized-pot MF for the practical application in engineering. The testing result indicates that the combined technology performs over 90% removal rate for organic substances and humus (UV254) and 70–80% removal rate for disinfection by-products including chloroform, bromoform and carbon tetrachloride. In addition, the combined technology also shows 70% minimum removal rate for pigments including chlorophyll and phycocyanobilin, 20–60% removal rate for water hardness, over 95% removal rate for sulfates which occupies the major part of bivalent salts, and 50–70% removal rate for odorous substances. Based on the pilot testing results, a new water purification process, which is sequentially combined by the conventional drinking water treatment technology, pressurized-pot MF and NF, is creatively applied in the large-scale engineering project of drinking water advanced treatment of Zhangjiagang Third Water Plant for the first time in China. The designed water-production amount of this project is 100 thousand tons per day, and the project is aimed at reforming and upgrading the drinking water treatment technology which is currently used in the Zhangjiagang Third Water Plant. The recovery rate of the NF system applied in the project is able to reach 90%, and the predicted electricity consumption of pressurized-pot MF system and NF system is, respectively, 0.003 and 0.197 kWh/ton of water. After accomplishing the project, Zhangjiagang Third Water Plant will be capable of supplying drinking water with higher quality and will simultaneously possess higher capability of replying to water contamination emergencies.

scholarly journals APLIKASI SISTEM PENYEDIAAN AIR BERSIH BERBASIS MASYARAKAT DI PULAU PANDANGAN, KABUPATEN PANGKAJENE, SULAWESI SELATAN

2018 ◽  
Vol 9 (1) ◽  
Author(s):  
Arie Herlambang
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Reverse Osmosis ◽  
Sea Water ◽  
Shallow Groundwater ◽  
Silica Sand ◽  
Treatment Technology ◽  
Treatment Unit ◽  
Produce Water ◽  
Water Treatment Technology

Pangkajene archipelago, is archipelago comprising 117 islands scattered in the West Coast District Pangkajene. The islands were inhabited by populations ranging from 10 to 250 heads of families. Most of the population livelihood as a fisherman. To support the daily basic needs are still supplied from the mainland, including the need for clean water. Community water needs during this time a lot depends on rain water that collected or from shallow groundwater. In line with population growth, water demand increases, so frequent water shortages, especially during the dry season. Sea water treatment technology with reverse osmosis systems is an alternative to the settlement of water shortage on the island, but because the number of islands many, it will be difficult to meet the needs of water in a short time. Therefore chosen the middle position of the three islands (Cakdi Saroppe Island, Island and Island Sanane view) as a distribution center. Installed capacity for each of the islands is 10 m3/day, which can serve to the needs of drinking water a thousand people. Water treatment technology with reverse osmosis pretreatment consist of the form of multi-media filter consisting of silica sand, zeolite, and activated carbon, followed by cartride filter and a reverse osmosis membrane. Construction of the water treatment unit involves people since it began surveying best location, construction, training and initial operation. Water that has been processed can drink for everyday purposes, therefore, to support the operations of the water is sold to the public for replacement of operational money. The biggest cost needed to produce water is the cost of fuel. By managing the sale of water expected operating costs can be met and comunity get drinking water at an affordable price.Keyword : dringking water, reverse osmosis, society engangement.

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