GUIDING SIGNIFICANCE OF MICROBIAL BENCHMARK IN RECLAIMED WATER DETECTION

SHI Liang-liang; LU Yun; CHEN Meng-hao; LIU Gang

doi:10.13205/j.hjgc.202103004

Volume 39 Issue 3

Jul. 2021

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SHI Liang-liang, LU Yun, CHEN Meng-hao, LIU Gang. GUIDING SIGNIFICANCE OF MICROBIAL BENCHMARK IN RECLAIMED WATER DETECTION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 22-28. doi: 10.13205/j.hjgc.202103004

Citation:

SHI Liang-liang, LU Yun, CHEN Meng-hao, LIU Gang. GUIDING SIGNIFICANCE OF MICROBIAL BENCHMARK IN RECLAIMED WATER DETECTION[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 22-28. doi: 10.13205/j.hjgc.202103004

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GUIDING SIGNIFICANCE OF MICROBIAL BENCHMARK IN RECLAIMED WATER DETECTION

doi: 10.13205/j.hjgc.202103004

State Key Joint Laboratory of Environmental Simulation and Pollution Control, State Environment Protection Key Laboratory of Microorganism Application and Safety Control, School of Environmental Sciences, Tsinghua University, Beijing 100084, China

Received Date: 2020-06-29
Available Online: 2021-07-19

Abstract

Abstract

Accurate and efficient quantitative detection of pathogenic microorganism in reclaimed water is of great significance to ensure the safe recycling of water resources. Based on quantitative microbial risk assessment (QMRA) method, taking the annual infection risk of 10^-4 as the maximum tolerable risk of the public, the benchmark concentration of 4 common pathogenic microorganisms in reclaimed water under 4 main applications were calculated. Then, the scientific requirements of sampling volume in culture method and molecular biology method were discussed, and a new concept of minimum sampling volume based on water quality health standard, named benchmark detection volume, was put forward. It was found that the measured water sample volume of pathogenic microorganisms in most existing studies was much smaller than the standard detection volume. This result indicated that for some pathogenic microorganisms with low abundance, due to the limited detection volume, the negative detection of pathogenic microorganisms in the treated reclaimed water didn't mean that the reclaimed water met the safety requirements. In this case, indirect detection of the removal rate of the treatment process should be used rationally to control the health risks of pathogenic microorganisms.
- reclaimed water,
- pathogenic microorganisms,
- benchmark,
- benchmark detection volume,
- health risks

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References(37)

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