Flow Cytometry as an Operational Tool to Improve Particle Removal in Drinking Water Treatment

2000 ◽  
pp. 147-157
Author(s):  
O. Bergstedt ◽  
H. Rydberg ◽  
L. Werner
Keyword(s):  
Flow Cytometry ◽  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Particle Removal ◽  
Operational Tool

scholarly journals Online flow cytometry reveals microbial dynamics influenced by concurrent natural and operational events in groundwater used for drinking water treatment

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Michael D. Besmer ◽  
Jannis Epting ◽  
Rebecca M. Page ◽  
Jürg A. Sigrist ◽  
Peter Huggenberger ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Drinking Water ◽  
Water Treatment ◽  
Drinking Water Treatment ◽  
Microbial Dynamics

Optimization of particle removal in drinking water treatment of reservoir water in a pressure filter plant

2002 ◽  
Vol 2 (1) ◽  
pp. 241-247
Author(s):  
K. Bornmann ◽  
B. Wricke ◽  
D. Habel
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
High Efficiency ◽  
Technological Development ◽  
Drinking Water Treatment ◽  
Particle Removal ◽  
Reservoir Water ◽  
Surface Water Treatment ◽  
Drinking Water Production ◽  
Treatment Step

Most surface water treatment plants use floc-filtration as the most important treatment step in drinking water production. This paper presents a new technological development which allows floc-filtration to be carried out in pressure filters. Experiments in pilot and full scale show its high efficiency. The technological development allows us to treat algal-rich and high turbid matter containing raw water efficiently at high filtration rates. Floc formation can be realised by means of a special reaction tank in front of the filter inlet. Efficient removal of particles and turbidity is achieved if filtration with filter inlet flow controller is used.

Monitoring of three drinking water treatment plants using flow cytometry

2014 ◽  
Vol 14 (5) ◽  
pp. 850-856 ◽  
Author(s):  
K. Helmi ◽  
A. Watt ◽  
P. Jacob ◽  
I. Ben-Hadj-Salah ◽  
A. Henry ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Drinking Water ◽  
Water Treatment ◽  
Cell Activity ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Culturable Bacteria ◽  
Culture Methods ◽  
Water Treatment Plants ◽  
Sampling Campaign

A 4-month sampling campaign has been conducted for the monitoring of three drinking water treatment plants using flow cytometry and culture-based methods to provide information related to changes in bacterial concentration according to treatments. Flow cytometry is a fast and user-friendly technique enabling bacteria quantification and viability assessment in less than 1 hour. Specific profiles regarding log-reduction of total bacteria were obtained for each treatment plant. Chlorination appeared to be the most effective by causing metabolism inactivation and nucleic acid damages. Ozonation showed a significant impact on cell activity in contrast with ultraviolet treatment which strongly affected bacterial DNA. In addition, the results showed that active bacteria quantified by flow cytometry were significantly correlated with culturable bacteria. This alternative approach appeared as gainful compared to culture methods as it greatly facilitates the diagnosis of treatment plant process for drinking water production monitoring.

Enhanced particle removal in drinking water treatment plants – case studies

2000 ◽  
Vol 41 (7) ◽  
pp. 135-142
Author(s):  
P. Lipp ◽  
G. Baldauf
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Case Studies ◽  
Surface Waters ◽  
Drinking Water Treatment ◽  
Particle Removal ◽  
Water Production ◽  
Water Treatment Plants ◽  
Drinking Water Production

Measurements of parasites in surface waters in Germany showed that their presence is widely spread. Concentrations may reach values up to a maximum of 50 cysts per 100 l. Normally raw waters used for drinking water production show much lower values. In order to ensure sufficient parasite removal in drinking water treatment plants an enhancement of particle removal is required. For filtration processes parameters influencing particle removal are filter media, filtration velocity, flocculant dosage, preozonationand filter back wash. Moderate filtration conditions show best results. Three case studies show that preozonation, optimized energy input and use of flocculants improve particle removal. One case study shows results of the first ultrafiltration plant in Germany treating reservoir and spring water for drinking water production.

Enhancing the particle removal efficiency of a drinking water treatment plant by membrane filtration

2001 ◽  
Vol 1 (5-6) ◽  
pp. 377-380
Author(s):  
G. Hagmeyer ◽  
O. Kiepke ◽  
W. Dautzenberg ◽  
R. Gimbel
Keyword(s):  
Drinking Water ◽  
Water Treatment ◽  
Pressure Vessel ◽  
Membrane Filtration ◽  
Treatment Plant ◽  
Drinking Water Treatment ◽  
Pressure Vessels ◽  
Particle Removal ◽  
Reservoir Water ◽  
Particle Counter

In the first step of the project funded by the German Federal Ministry for Education and Research (BMBF) three UF pilot systems (about 10 m3/h) were evaluated for drinking water treatment of reservoir water. In the second step a 150 m3/h pilot plant with 12 6 m long pressure vessels was installed in the waterworks of Roetgen. One of the unique features of the pilot is, that the inlet and outlet flows of every pressure vessel are monitored. Further on a particle counter is installed. With this particle counter the filtrate of every pressure vessel can be monitored automatically by switching magnetic valves.

Evaluation of chitosan as a natural coagulant for drinking water treatment

2010 ◽  
Vol 61 (8) ◽  
pp. 2119-2128 ◽  
Author(s):  
R. Fabris ◽  
C. W. K. Chow ◽  
M. Drikas
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Water Treatment ◽  
Treatment Process ◽  
Drinking Water Treatment ◽  
Quality Parameters ◽  
Particle Removal ◽  
Turbidity Removal ◽  
Treatment Technologies ◽  
Treatment Step

Chitosan, a natural biopolymer, was evaluated for its ability to be used as a coagulant to treat water for potable use both in isolation and in combination with other water treatment technologies, specifically ion-exchange and activated carbon. Chitosan was found to be very effective for particle removal at doses far below those required for equivalent turbidity removal by inorganic coagulants. However in the water sources tested, chitosan was not particularly efficient for dissolved organic carbon (DOC) removal when applied as the sole treatment step. When applied as the final clarification stage of a multi-step treatment process, chitosan exhibited limited turbidity reduction due to specific flocculation requirements. This combination of treatment technologies was also unable to further reduce secondary water quality parameters, such as disinfectant demand and trihalomethane (THM) formation.

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