Polymer materials in contact with drinking water: evaluation of bacterial growth stimulation with a dynamic testing approach

2010 ◽  
Vol 41 (2) ◽  
pp. 89-107 ◽  
Author(s):  
Éric Chauveheid ◽  
Nadine Hansen
Keyword(s):  
Drinking Water ◽  
Bacterial Growth ◽  
Dynamic Testing ◽  
Growth Stimulation ◽  
Polymer Materials ◽  
Testing Approach

The assessment of biofilm community composition on plumbing materials in filtered and unfiltered water distribution systems

2003 ◽  
Vol 3 (1-2) ◽  
pp. 187-191
Author(s):  
M.M. Critchley ◽  
N.J. Cromar ◽  
H.J. Fallowfield
Keyword(s):  
Drinking Water ◽  
Fatty Acid ◽  
Community Composition ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Polymer Materials ◽  
Fatty Acid Profiles ◽  
Water Supplies ◽  
Drinking Water Distribution Systems

Biofilms have been extensively characterised within drinking water distribution systems. However, the significance of materials on biofilm species diversity is not established. This study investigated the community composition of biofilms on plumbing materials receiving filtered and unfiltered water supplies. Biofilms were extracted from polybutylene, polyethylene, cross-linked polyethylene, unplasticised polyvinyl chloride and copper tubes in sampling rigs receiving Murray-Onkaparinga water before or after filtration. Biofilms were extracted and analysed for fatty acid composition using the FAME™ methodology. There were differences in the fatty acid profiles of biofilms and the respective water supplies, indicating differences in the attached and planktonic communities. The results also showed significant differences in the fatty acid profiles of biofilms on the polymer materials compared to copper, suggesting variations in biofilm populations on the different materials. The potential for materials to select for microbial populations has significant implications for the ecology of drinking water biofilms.

Modeling Bacterial Growth in Drinking Water: Effect of Nutrients

2004 ◽  
Vol 96 (5) ◽  
pp. 129-141 ◽  
Author(s):  
Veeriah Jegatheesan ◽  
George Kastl ◽  
Ian Fisher ◽  
Joseph Chandy ◽  
Mark Angles
Keyword(s):  
Drinking Water ◽  
Bacterial Growth ◽  
Water Effect

Occurrences and changes in bacterial growth-promoting nutrients in drinking water from source to tap: A review

2021 ◽  
Author(s):  
Jiwon Park ◽  
Jin Hyung Noh ◽  
Thi Huyen Duong ◽  
Sang-Yeop Chung ◽  
Heejong Son ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Bacterial Growth ◽  
Assimilable Organic Carbon ◽  
Growth Promoting ◽  
Community Changes

Biostable drinking water, which does not support bacterial growth and community changes, is obtained by removing bacterial growth-promoting nutrients, such as assimilable organic carbon (AOC), through a range of treatment...

Understanding the impacts of sodium silicate on water quality and iron oxide particles

2019 ◽  
Vol 5 (8) ◽  
pp. 1360-1370 ◽  
Author(s):  
Bofu Li ◽  
Benjamin F. Trueman ◽  
Mohammad Shahedur Rahman ◽  
Yaohuan Gao ◽  
Yuri Park ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Iron Oxide ◽  
Water Treatment ◽  
Sodium Silicate ◽  
Bacterial Growth ◽  
Drinking Water Treatment ◽  
Iron Oxide Particles ◽  
Oxide Particles

Silicates represent an alternative drinking water treatment for colour and turbidity due to iron. They may avoid the drawbacks of polyphosphates: increased lead solubility, the potential for increased bacterial growth, and phosphorus in wastewater.

Effects of AOC and Phosphorus on Bacterial Growth under Oligotrophic Condition (1)

2011 ◽  
Vol 138-139 ◽  
pp. 981-987
Author(s):  
Deng Ling Jiang ◽  
Guo Wei Ni ◽  
Yu Min Zhang
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Bacterial Growth ◽  
Water Samples ◽  
Phosphorus Concentration ◽  
Lag Phase ◽  
Limiting Factor ◽  
Bacterial Number ◽  
In The Beginning ◽  
Oligotrophic Condition

The effects of phosphorus and organic carbon on bacterial growth were investigated in the laboratory. The bacteria sampled from the drinking water network of Tianjin were inoculated into water samples with different content of phosphorus (0～15µg PO43--P/L) and assimilable organic carbon (10～200µgAOC/L). The inoculated water samples were incubated at 20°C. Bacterial growth was monitored in every 2 days in the beginning of cultivation and in every 4 days or more in the later of the cultivation. Results showed that Phosphorus had obvious promotion on bacterial growth, which included shortening the lag phase evidently, increasing the growth rate and the maximum cell count in stationary phase. Carbon can only increase bacterial number. Under oligotrophic condition，when ratio of AOC: P in nutrients of water was more than 100:5, phosphorus was the limiting factor of bacterial growth. The bacterial yield factors against phosphorus and AOC were 1.1×109CFU/µgP and 9.0×107CFU/µgAOC respectively. Phosphorus was more sensitive than AOC. When the phosphorus concentration was less than 0.7µg/L in water samples, it was very difficult for bacteria to obtain phosphorus, and then growth of bacteria was very slowly or in lag phase in the first nine days of incubation time. In drinking water with low concentration of phosphorus (<0.7µg/L) and disinfectants, bacterial regrowth may be controlled. The paper will be Narrated in two parts, “Effects of AOC and Phosphorus on Bacterial Growth under Oligotrophic Condition (1)” and “Effects of AOC and Phosphorus on Bacterial Growth under Oligotrophic Condition (2)”.

scholarly journals Bacterial Growth Stimulation with Exogenous Siderophore and Synthetic N-Acyl Homoserine Lactone Autoinducers under Iron-Limited and Low-Nutrient Conditions

2000 ◽  
Vol 66 (7) ◽  
pp. 2797-2803 ◽  
Author(s):  
Le Luo Guan ◽  
Hiroyuki Onuki ◽  
Kei Kamino
Keyword(s):  
Bacterial Growth ◽  
Culture Medium ◽  
Cell Communication ◽  
Direct Interaction ◽  
Growth Stimulation ◽  
Homoserine Lactone ◽  
Marine Sponges ◽  
Siderophore Production ◽  
Iron Binding ◽  
Chemical Signal

ABSTRACT The growth of marine bacteria under iron-limited conditions was investigated. Neither siderophore production nor bacterial growth was detected for Pelagiobacter sp. strain V0110 when Fe(III) was present in the culture medium at a concentration of <1.0 μM. However, the growth of V0110 was strongly stimulated by the presence of trace amounts of exogenous siderophore from an alpha proteobacterium, V0902, and 1 nM N-acyl-octanoylhomoserine lactone (C8-HSL), which is known as a quorum-sensing chemical signal. Even though the iron-binding functionality of a hydroxamate siderophore was undetected in the supernatant of V0902, a hydroxamate siderophore was detected in the supernatant of V0110 under the above conditions. These results indicated that hydroxamate siderophore biosynthesis by V0110 began in response to the exogenous siderophore from V0902 when in the presence of C8-HSL; however, C8-HSL production by V0110 and V0902 was not detected. Direct interaction between V0902 and V0110 through siderophore from V0902 was observed in the dialyzing culture. Similar stimulated growth by exogenous siderophore and HSL was also observed in other non-siderophore-producing bacteria isolated from marine sponges and seawater. The requirement of an exogenous siderophore and an HSL for heterologous siderophore production indicated the possibility that cell-cell communication between different species was occurring.

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