Research on Pipeline Gas Application System

Guo, Ai Zhang; Liu, Guo Ling

doi:10.4028/www.scientific.net/amm.433-435.1836

Cited by 1 publication

(1 citation statement)

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“…In addition to the influence of pipe materials, the temperature trended to vary in a way with the change of all the water parameters, supporting the assumption that water deteriorates fiercely with the rise of temperature. On the one hand, the temperature is the main reason that causes the change in the diversity of bacteria [34]. On the other hand, biofilm formation and the release of EPS are much slower and much more separated at a lower temperature, which accounts for water deterioration [35].…”

Section: The Difference In Water Quality Due To the Activity Of Micro...mentioning

confidence: 99%

Effect of Pipe Materials on Bacterial Community, Redox Reaction, and Functional Genes

et al. 2022

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In the present study, the effect of pipe materials on water quality as well as the microbial community was researched with static devices as well as dynamic ones. Five kinds of pipe materials (SP: steel plastic composite pipe, SS: stainless steel pipe, DI: ductile iron pipe, CI: cast iron pipe, GS: galvanized steel pipe) were chosen, and the soaking experiment was carried out with bench-scale devices. To further investigate the performance of pipe materials over a long term, a pilot-scale simulated drinking water distribution system was constructed, and the water quality parameters were monitored for six months. The pipe materials were ranked as SP, DI, and CI by the order of increasing turbidity, CODMn, and NH3-N. Furthermore, the biofilm samples were analyzed via pyrosequencing and COG functional categories. The DI biofilm possessed the highest bacterial diversity with a Shannon index of 3.56, followed by SP (3.14) and CI (0.77). The presence of nitrate-reducing bacteria (NRB), iron-oxidizing bacteria (IOB), iron-reducing bacteria (IRB), and sulfate-reducing bacteria (SRB)was identified, and NRB composed the largest share in all pipe materials (13.0%–17.2%), with other redox bacteria making up a minor proportion (0.02%–1.52%). NRB and IRB inhibited the corrosion process while IOB and SRB enhanced it. Most dominant genera present in samples were derived firstly from soil or active sludge, indicating a turbidity problem due to soil contamination in the distribution network.

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Section: The Difference In Water Quality Due To the Activity Of Micro...mentioning

confidence: 99%