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...

scholarly journals Effects of Assimilable Organic Carbon and Free Chlorine on Bacterial Growth in Drinking Water

PLoS ONE ◽  
2015 ◽  
Vol 10 (6) ◽  
pp. e0128825 ◽  
Author(s):  
Xiaolu Liu ◽  
Jingqi Wang ◽  
Tingting Liu ◽  
Weiwen Kong ◽  
Xiaoqing He ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Bacterial Growth ◽  
Free Chlorine ◽  
Assimilable Organic Carbon

A comparative study of three different assimilable organic carbon (AOC) methods: results of a round-robin test

2013 ◽  
Vol 13 (4) ◽  
pp. 1024-1033 ◽  
Author(s):  
P. S. Ross ◽  
F. Hammes ◽  
M. Dignum ◽  
A. Magic-Knezev ◽  
B. Hambsch ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Bacterial Growth ◽  
Distribution Networks ◽  
Round Robin ◽  
Biological Stability ◽  
Bacterial Strains ◽  
Round Robin Test ◽  
Assimilable Organic Carbon ◽  
Wide Range

Easily assimilable organic carbon (AOC) is frequently used for the assessment of the biological stability of drinking water, which is an important consideration in the control of bacterial growth in distribution networks. The first AOC bioassay was developed in 1982 and is based on growth of two bacterial strains (Pseudomonas fluorescens P17 and Spirillum spp. NOX) in drinking water relative to their growth on acetate. Much research was subsequently conducted to modify, simplify and increase the speed of the assay which resulted in a number of alternative AOC assays. Application of these assays raises legitimate questions about the comparison of AOC data from different studies. In the present study, a round-robin test was performed to evaluate the correlation between three established AOC methods. A total of 14 water samples, covering a wide range of AOC concentrations, were analyzed with the original ‘van der Kooij’ method, the ‘Werner & Hambsch’ method and ‘Eawag’ method. Good correlations were found between AOC concentrations measured with the various methods. The data suggest an acceptable compatibility between different AOC methods, although deviations between the methods call for careful interpretation and reporting of AOC data.

Investigation of assimilable organic carbon (AOC) in flemish drinking water

2005 ◽  
Vol 39 (11) ◽  
pp. 2259-2266 ◽  
Author(s):  
Monika Polanska ◽  
Koen Huysman ◽  
Chris van Keer
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Assimilable Organic Carbon

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)”.

A survey on levels and seasonal changes of assimilable organic carbon (AOC) and its precursors in drinking water

2011 ◽  
Vol 32 (14) ◽  
pp. 1605-1613 ◽  
Author(s):  
Yumiko Ohkouchi ◽  
Bich Thuy Ly ◽  
Suguru Ishikawa ◽  
Yusuke Aoki ◽  
Shinya Echigo ◽  
...  
Keyword(s):  
Drinking Water ◽  
Organic Carbon ◽  
Seasonal Changes ◽  
Assimilable Organic Carbon
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