scholarly journals Physico-chemical treatment for the degradation of cyanotoxins with emphasis on drinking water treatment—How far have we come?

2018 ◽  
Vol 6 (4) ◽  
pp. 5369-5388 ◽  
Author(s):  
Pratik Kumar ◽  
Krishnamoorthy Hegde ◽  
Satinder Kaur Brar ◽  
Maximiliano Cledon ◽  
Azadeh Kermanshahi pour
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Chemical Treatment ◽  
Drinking Water Treatment ◽  
Physico Chemical

Evaluation of a drinking water treatment process involving directly recycling filter backwash water using physico-chemical analysis and toxicity assay

RSC Advances ◽  
2016 ◽  
Vol 6 (80) ◽  
pp. 76922-76932 ◽  
Author(s):  
Bingwei Hou ◽  
Tao Lin ◽  
Wei Chen
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Water Conservation ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Pollutant Removal ◽  
Water Treatment Process ◽  
Physico Chemical ◽  
Filter Backwash Water

Recycling the filter backwash water of a drinking water treatment plant (DWTP) was considered as a feasible method to enhance the efficiencies of pollutant removal and water conservation.

scholarly journals Manganese removal processes at 10 groundwater fed full-scale drinking water treatment plants

2019 ◽  
Vol 54 (4) ◽  
pp. 326-337 ◽  
Author(s):  
I. L. Breda ◽  
L. Ramsay ◽  
D. A. Søborg ◽  
R. Dimitrova ◽  
P. Roslev
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Filter Material ◽  
Chemical Processes ◽  
Full Scale ◽  
Limited Effect ◽  
Water Treatment Plants ◽  
Physico Chemical ◽  
Removal Processes

Abstract Manganese (Mn) removal in drinking water filters is facilitated by biological and physico-chemical processes. However, there is limited information about the dominant processes for Mn removal in full-scale matured filters with different filter materials over filter depth. Water and filter material samples were collected from 10 full-scale drinking water treatment plants (DWTPs) to characterise the Mn removal processes, to evaluate the potential use of enhancers and to gain further insight on operational conditions of matured filters for the efficient Mn removal. The first-order Mn removal constant at the DWTPs varied from 10−2 to 10−1 min−1. The amount of Mn coating on the filter material grains showed a strong correlation with the amount of iron, calcium and total coating, but no correlation with the concentration of ATP. Inhibition of biological activity showed that Mn removal in matured filters was dominated by physico-chemical processes (59–97%). Addition of phosphorus and trace metals showed limited effect on Mn removal capacity, indicating that the enhancement of Mn removal in matured filters is possible but challenging. There was limited effect of the filter material type (quartz, calcium carbonate and anthracite) on Mn removal in matured filters, which can be relevant information for the industry when assessing filter designs and determining returns of investments. This article has been made Open Access thanks to the kind support of CAWQ/ACQE (https://www.cawq.ca).

Microbial activity in drinking water-associated biofilms

2013 ◽  
Vol 8 (2) ◽  
pp. 201-214 ◽  
Author(s):  
Anca Farkas ◽  
Mihail Dragan-Bularda ◽  
Vasile Muntean ◽  
Dorin Ciataras ◽  
Stefan Tigan
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Microbial Activity ◽  
Iron Reduction ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Water Treatment Plant ◽  
Bulk Water ◽  
Bulk Fluid ◽  
Physico Chemical

AbstractMicrobial biofilms from surfaces in contact with water may play a beneficial role in drinking water treatment as biological filters. However, detrimental effects such as biofouling (i.e., biocorrosion and water quality deterioration) may also occur. In this study microbiological processes and factors influencing the activity of bacteria in biofilms were investigated by conventional cultivation methods. The presence of bacteria belonging to different ecophysiological groups was assessed during drinking water treatment, in biofilms developed on concrete, steel and sand surfaces. Influences of the treatment process, type of immersed material and physico-chemical characteristics of raw/bulk water and biofilms upon the dynamics of bacterial communities were evaluated. Results revealed intense microbial activity in biofilms occurring in the drinking water treatment plant of Cluj. Ammonification, iron reduction and manganese oxidation were found to be the predominant processes. Multiple significant correlations were established between the evolution of biofilm bacteria and the physico-chemical parameters of raw/ bulk water. The type of immersed material proved to have no significant influence upon the evolution of microbial communities, but the treatment stage, suggesting that the processes applied restrict microbial growth not only in bulk fluid but in biofilms, too.

ASSESSMENT OF ELECTROCOAGULATION PROCESS FOR DRINKING WATER TREATMENT

2015 ◽  
Vol 14 (6) ◽  
pp. 1347-1354 ◽  
Author(s):  
Florica Manea ◽  
Anamaria Baciu ◽  
Aniela Pop ◽  
Katalin Bodor ◽  
Ilie Vlaicu
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Electrocoagulation Process
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