Advanced membrane technology for application to water treatment

1998 ◽  
Vol 37 (10) ◽  
pp. 91-99 ◽  
Author(s):  
Yasumoto Magara ◽  
Shoichi Kunikane ◽  
Masaki Itoh
Keyword(s):  
Water Treatment ◽  
Organic Contaminants ◽  
Drinking Water Treatment ◽  
Treatment Method ◽  
Pilot Scale ◽  
Membrane Technology ◽  
Successful Implementation ◽  
Treatment Processes ◽  
Further Development ◽  
By Products

Following the successful implementation of the ‘MAC21’ Project, the ‘New MAC21’ Project is being implemented for further development of membrane technology in Japan. The project includes various pilot-scale and laboratory experiments on 1) nanofiltration system, and 2) MF/UF system combined with advanced treatment processes such as activated carbon treatment, ozonation and biological treatment. As the result, it has been shown that both systems are applicable to drinking water treatment. Although a NF system was very effective for the removal of organic contaminants such as precursors of disinfection by-products, it is considered that the development of a proper treatment method for the concentrate will be very important in the future.

Evaluation of Drinking Water Treatment Alternatives for Taste and Odour Reduction

1984 ◽  
Vol 19 (1) ◽  
pp. 119-131
Author(s):  
N. Fok ◽  
P.M. Huck ◽  
G.S. Walker ◽  
D.W. Smith
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Chlorine Dioxide ◽  
Drinking Water Treatment ◽  
Pilot Scale ◽  
Ethyl Benzene ◽  
The North ◽  
Treatment Processes ◽  
Treatment Alternatives ◽  
The City

Abstract The City of Edmonton draws its drinking water from the North Saskatchewan River. Periodic taste and odour episodes have been related to organic compounds from urban runoff draining into the river. This paper describes the testing of 3 water treatment processes to reduce taste and odour. Chlorine dioxide, ozone and granular activated carbon were evaluated at pilot scale. Ethyl benzene was spiked into the water as a surrogate for taste and odour to permit quantitative comparisons. Under the conditions tested, ozone provided better removals than chlorine dioxide. GAC provided effective removals as well.

Variation of Disinfection By-Products Formation Potential Species at Several Stages of Drinking Water Treatment Plants

2013 ◽  
Vol 777 ◽  
pp. 337-340
Author(s):  
Qiang Zhang ◽  
Bin Liu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Biological Activated Carbon ◽  
Formation Potential ◽  
Treatment Processes ◽  
Water Treatment Plants ◽  
Microbial Products ◽  
Water Plants ◽  
By Products

The variation of disinfection by-products (DBPs) at several stages of drinking water treatment plants was investigated in two drinking water plants. The results clearly indicate that the low molecular weight total organic carbon (TOC) which has been identified as primary precursor for chlorinated DBPs was difficult to remove by coagulation. Plant A which used conventional coagulation/sedimentation could not decrease the species of trihalomethanes (THMs) and haloacetic acids (HAAs) formation potential. Biological activated carbon (BAC) was applied in Plant B which removed the maximum amount of TOC, while more kinds of microbial products were produced in BAC unit which could be the potential precursors of DBPs. Therefore, the species of DBPs formation potential still increased in the treatment processes of Plant B. Because different components of organic precursors produced different DBPs species, the processes of Plant B could decrease TOC efficiently but the species of THMs and HAAs formation potential.

Removal of disinfection by‐products and their precursors during drinking water treatment processes

2019 ◽  
Vol 92 (5) ◽  
pp. 698-705 ◽  
Author(s):  
Qiufeng Lin ◽  
Feilong Dong ◽  
Yunxia Miao ◽  
Cong Li ◽  
Weicheng Fei
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Treatment Processes ◽  
By Products

Use of a stable carbon isotope to assess the efficiency of a drinking water treatment method with CO2

2012 ◽  
Vol 65 (6) ◽  
pp. 983-988 ◽  
Author(s):  
M. Poberžnik ◽  
A. Leis ◽  
A. Lobnik
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Dissolved Inorganic Carbon ◽  
Tap Water ◽  
Stable Carbon Isotope ◽  
Research Work ◽  
Drinking Water Treatment ◽  
Treatment Method ◽  
Water Supply Systems ◽  
Co2 Gas

CO2 gas with a special isotopic signature (δ13C = −35.2‰ vs. VPDB) was used as a marker to evaluate the efficiency of a drinking water treatment method and the effect of an ultrasonic (US) stirrer. This treatment was developed to prevent precipitation and corrosion effects in water–supply systems. The research work was performed using a laboratory-scale pilot plant that was filled with tap water. The stable isotope analyses of δ13C-DIC (Dissolved Inorganic Carbon) in the water samples indicated that the maximum content of added CO2 gas in DIC was in the range of 35 to 45%. The use of the US stirrer during the entire experiment decreased the method's overall efficiency by 10%, due to degassing at a late stage of the experiment but accelerated the dissolution process in the early experimental stage.

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