scholarly journals Evaluating membrane performance in recycled water treatment plants for assets replacement strategy

2017 ◽  
Vol 76 (11) ◽  
pp. 2941-2948
Author(s):  
Petra J. Reeve ◽  
Rudi Regel ◽  
Isabelle Le Moigne ◽  
Ben van den Akker ◽  
Paul Monis ◽  
...  
Keyword(s):  
Water Treatment ◽  
Membrane Integrity ◽  
Full Scale ◽  
Recycled Water ◽  
Virus Challenge ◽  
Membrane Performance ◽  
Water Treatment Plants ◽  
Operational Life ◽  
Important Barrier ◽  
Asset Replacement

Abstract Membranes are an important barrier used in recycled water treatment plants for pathogen removal. Understanding performance over operational life is important to inform membrane replacement. In this study, full scale virus challenge testing was conducted on newly commissioned membranes to validate virus log removal values for accreditation. After six years of operation, the membrane integrity was repeated to ensure compliance with the state regulatory health authority and gain an understanding of the asset's condition. Membrane performance was assessed using a combination of complementary tests including membrane autopsy and chemical tolerance testing to assess individual modules and selected membrane fibres, followed by a full scale virus challenge for whole of unit assessment. The results demonstrated that the aged membrane fibres were intact and had not been affected by long-term exposure to chlorine, which provides valuable information for membrane asset replacement strategies.

Effectively Managing Source Water Quality Affecting Downstream Recycled Water Treatment Plants

2014 ◽  
Vol 2014 (14) ◽  
pp. 2625-2640
Author(s):  
Alice E. Towey ◽  
John M. Hake ◽  
Erika R. Gardner ◽  
Joseph A. Augustine
Keyword(s):  
Water Quality ◽  
Water Treatment ◽  
Source Water ◽  
Recycled Water ◽  
Water Treatment Plants ◽  
Source Water Quality

scholarly journals Membrane ageing in full-scale water treatment plants

2020 ◽  
Vol 169 ◽  
pp. 115212 ◽  
Author(s):  
Shona Robinson ◽  
Pierre R. Bérubé
Keyword(s):  
Water Treatment ◽  
Full Scale ◽  
Water Treatment Plants

Nanofiltration selection for NOM removal: pilot and full-scale operation

2011 ◽  
Vol 6 (2) ◽  
Author(s):  
Laurence Durand-Bourlier ◽  
Amandine Tinghir ◽  
Philippe Masereel ◽  
Sylvie Baig
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Water Treatment ◽  
Surface Water ◽  
Organic Carbon ◽  
Drinking Water Treatment ◽  
Resource Scarcity ◽  
Full Scale ◽  
Organic Matter Removal ◽  
Water Treatment Plants

Belgium is increasingly encountering drinking water problems because of resource scarcity and because of the quality of surface water from rivers and canal, which are often highly degraded. High organic matter concentrations are found and treated water has non-satisfying organic contents. This has a direct impact on THM formation and bacteria regrowth in the supply network. With more and more stringent regulations, organic matters concentration level in drinking water must be reduced. Nanofiltration (NF) is a suitable method for organic matter removal with reduction efficiency sometimes higher than 90 % (Orecki et al. 2004). It can be more effective than conventional technologies like activated carbon adsorption (Coté et al. 1996). This is a reason for upgrading old treatment plants by using NF treatment as a polishing step. Two drinking water treatment plants located in Eupen and La Gileppe in Belgium needed to be upgraded. These both plants treat surface water from dams and are equipped with a conventional clarification. A pilot study was carried out to compare different treatment files to remove Total Organic Carbon (TOC) and Biologically Degradable Organic Carbon (BDOC). NF process has been finally chosen. The aim of the paper is to report and discuss data supporting the choice of NF from pilot scale study and next full-scale performances of both upgraded drinking water treatment plants. The whole demonstrates the interest of NF as a suitable technology organic matter removal.

Evaluation of Particle Removal at Water Treatment Plants in Nova Scotia

2001 ◽  
Vol 36 (1) ◽  
pp. 105-119 ◽  
Author(s):  
John D. Eisnor ◽  
Kevin C. O'Leary ◽  
Graham A. Gagnon
Keyword(s):  
Drinking Water ◽  
Nova Scotia ◽  
Water Treatment ◽  
Colloidal Particles ◽  
Membrane Integrity ◽  
Particulate Material ◽  
Water Quality Parameter ◽  
Particle Removal ◽  
Filter Performance ◽  
Water Treatment Plants

Abstract The physical removal of colloidal particles, microorganisms and other particulate material is an important objective for drinking water utilities. Because of the low concentration of suspended material in drinking water, turbidity has traditionally been the main water quality parameter for assessing particle removal in water treatment. However, particle counting is becoming increasingly popular for process optimization in conventional plants and for monitoring membrane integrity in new microfiltration and/or ultrafiltration plants. The research describes a survey of particle removal at four water treatment plants in Nova Scotia. Turbidity and particle counts were analyzed in both raw and filtered water. The treatment processes of the four plants was compared using particle count data. The results indicate that particle counters are able to detect decreases in filter performance earlier than turbidimeters.

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).

Methodological approach for the optimization of drinking water treatment plants' operation: a case study

2014 ◽  
Vol 71 (4) ◽  
pp. 597-604 ◽  
Author(s):  
Sabrina Sorlini ◽  
Maria Cristina Collivignarelli ◽  
Federico Castagnola ◽  
Barbara Marianna Crotti ◽  
Massimo Raboni
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Distribution System ◽  
Methodological Approach ◽  
Experimental Studies ◽  
Drinking Water Treatment ◽  
Experimental Tests ◽  
Full Scale ◽  
Water Quality Control ◽  
Water Treatment Plants

Critical barriers to safe and secure drinking water may include sources (e.g. groundwater contamination), treatments (e.g. treatment plants not properly operating) and/or contamination within the distribution system (infrastructure not properly maintained). The performance assessment of these systems, based on monitoring, process parameter control and experimental tests, is a viable tool for the process optimization and water quality control. The aim of this study was to define a procedure for evaluating the performance of full-scale drinking water treatment plants (DWTPs) and for defining optimal solutions for plant upgrading in order to optimize operation. The protocol is composed of four main phases (routine and intensive monitoring programmes – Phases 1 and 2; experimental studies – Phase 3; plant upgrade and optimization – Phase 4). The protocol suggested in this study was tested in a full-scale DWTP placed in the North of Italy (Mortara, Pavia). The results outline some critical aspects of the plant operation and permit the identification of feasible solutions for the DWTP upgrading in order to optimize water treatment operation.

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