scholarly journals Microbiological Induced Corrosion on Brass in Recycling Cooling Water System Makeup by Reclaimed Water

2012 ◽  
Vol 03 (04) ◽  
pp. 253-258 ◽  
Author(s):  
Ping Xu ◽  
Zhaoyi Xu ◽  
Jin Wang ◽  
Yajun Zhang ◽  
Ting Liu
Keyword(s):  
Reclaimed Water ◽  
Water System ◽  
Cooling Water ◽  
Cooling Water System

scholarly journals Microbial Population Structure In Circulating Cooling Water System Makeup By Municipal Reclaimed Water

2001 ◽  
Vol 71 (3) ◽  
pp. 565-579
Author(s):  
Huanhuan Huang ◽  
Ping Xu ◽  
Jie Wang ◽  
Changzheng Wang
Keyword(s):  
Population Structure ◽  
Microbial Population ◽  
Reclaimed Water ◽  
Water System ◽  
Cooling Water ◽  
Corrosion Mechanism ◽  
Network Systems ◽  
Chemical Agents ◽  
Cooling Water System ◽  
Circulating Cooling Water

The municipal reclaimed water, which often reused in circulating cooling water system, can effectively alleviate the urban water crisis. However, the reclaimed water contains a large number of microorganisms while the water environment in circulating cooling water system allows the micro-organisms to further increase. Therefore, circulating cooling water system faces slime, corrosion and other microbial problems. In this work, the microbial population structure of circulating cooling water makeup by municipal reclaimed water was investigated by using modern molecular biology DNA technology. Our results demonstrated that at the level of family, there were 17 kinds of suspended microorganisms in municipal reclaimed water, in which the dominant strain belonged to Proteobacteria, Betaproteobacteria, Methylophilales, Methylophilaceae. For the circulating cooling water without chemical agents, 13 kinds of suspended bacterias and 36 kinds of immobilized bacteria were detected, in which the dominant strain respectively was Comamonadaceae and Pseudomonadaceae which belonging to Proteobacteria Betaproteobacteria. After adding chemical agents, the number of suspended bacteria increased to 26 kinds and the distribution of bacteria species was even more. And the dominant strain become Staphylococcaceae, which belonged to Firmicutes, Bacilli, Bacillales, the reason for this was the sharply increase of TOC and TP after adding scale and corrosion inhibitors. Corrosion of instrumentation and pipe network systems caused by microorganisms is particularly complicated in circulating cooling water systems and even in whole reclaimed water utilization systems. The corrosion mechanism and corrosion process caused by different microorganisms are different. Therefore, it is very important to explore the composition of microorganisms in reclaimed water to study the corrosion of microorganisms. Based on the study of microbial population structure in municipal reclaimed water, this paper explores the microbial population structure and dominant species in the water in response to the specific situation in which reclaimed water is reused in the circulating cooling water system. At the same time, it also provides some research suggestions for the future research on the corrosion caused by microorganisms in the reuse of recycled water.

scholarly journals Foulant Characteristics Comparison in Recycling Cooling Water System Makeup by Municipal Reclaimed Water and Surface Water in Power Plant

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Xu Ping ◽  
Wang Jing ◽  
Zhang Yajun ◽  
Wang Jie ◽  
Si Shuai
Keyword(s):  
Surface Water ◽  
Power Plants ◽  
Reclaimed Water ◽  
Water System ◽  
Cooling Water ◽  
Steel Corrosion ◽  
Water Shortage ◽  
Sulfate Reducing ◽  
Cooling Water System ◽  
Reducing Bacteria

Due to water shortage, municipal reclaimed water rather than surface water was replenished into recycling cooling water system in power plants in some cities in China. In order to understand the effects of the measure on carbon steel corrosion, characteristics of two kinds of foulant produced in different systems were studied in the paper. Differences between municipal reclaimed water and surface water were analyzed firstly. Then, the weight and the morphology of two kinds of foulant were compared. Moreover, other characteristics including the total number of bacteria, sulfate reducing bacteria, iron bacteria, extracellular polymeric substance (EPS), protein (PN), and polysaccharide (PS) in foulant were analyzed. Based on results, it could be concluded that microbial and corrosive risk would be increased when the system replenished by municipal reclaimed water instead of surface water.

Effect of diesel on corrosion inhibitors and application of bio-enzyme corrosion inhibitors in the laboratory cooling water system

2015 ◽  
Vol 93 ◽  
pp. 293-300 ◽  
Author(s):  
Fang Liu ◽  
Li Zhang ◽  
Xi Yan ◽  
Xianhui Lu ◽  
Ya Gao ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Water System ◽  
Cooling Water ◽  
Cooling Water System

Effect of Mixed-Species Biofilm on Copper Surfaces in Cooling Water System

2014 ◽  
Vol 24 (2) ◽  
pp. 848-858 ◽  
Author(s):  
Nihal Doğruöz Güngör ◽  
Ayşın Çotuk ◽  
Esra Ilhan-Sungur ◽  
Nurhan Cansever
Keyword(s):  
Water System ◽  
Cooling Water ◽  
Mixed Species ◽  
Copper Surfaces ◽  
Cooling Water System
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