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Sensor calibration for microbial risk analysis in water

Zhang, Yilin LU (2025) In TVVR 4000 VVRL01 20251
Division of Water Resources Engineering
Abstract
In the background of intensifying global climate change and rapid urbanisation, the frequent occurrence of extreme hydrological events and the increase in surface pollution pose serious challenges to the environmental quality of water bodies. Moreover, with the significant increase in public awareness of environmental protection, higher demands have been placed on water quality monitoring techniques, and novel monitoring techniques have been developed. In this study, a novel in situ fluorescence sensor, VLux TPro, was used in combination with laboratory OD measurements in the Vombsjön watershed, Sweden, in order to assess the water quality in the region as well as the applicability and stability of the sensor. The results of the study... (More)
In the background of intensifying global climate change and rapid urbanisation, the frequent occurrence of extreme hydrological events and the increase in surface pollution pose serious challenges to the environmental quality of water bodies. Moreover, with the significant increase in public awareness of environmental protection, higher demands have been placed on water quality monitoring techniques, and novel monitoring techniques have been developed. In this study, a novel in situ fluorescence sensor, VLux TPro, was used in combination with laboratory OD measurements in the Vombsjön watershed, Sweden, in order to assess the water quality in the region as well as the applicability and stability of the sensor. The results of the study showed that (1) DOM in the watershed mainly originated from terrestrial sources of humus (TLF/FDOM ratio around 0.1), and no obvious anthropogenic pollution or algal outbreaks were detected, which was ecologically sound; and (2) the VLux TPro sensor demonstrated relatively good stability (linear regression of ABS versus OD360 R²= 0.798) and its TLF monitoring data were reliable. The study confirms that the sensor can monitor microbial risk in real time, has fast response characteristics, and shows important application prospects in water plant process optimisation and pollution early warning. (Less)
Popular Abstract
Amid growing climate change and urbanisation, extreme hydrological events and surface pollution increasingly threaten water quality. Public demand for better water monitoring techniques has led to new innovations. This study assessed water quality in Sweden's Vombsjön watershed using the VLux TPro fluorescence sensor alongside lab OD measurements. Results showed that DOM mostly came from terrestrial humus sources, with minimal anthropogenic pollution or algal outbreaks, indicating good ecological health. The sensor demonstrated stability and reliability, confirming its potential for real-time microbial risk monitoring, fast response, and application in water plant optimisation and early pollution warning.
Please use this url to cite or link to this publication:
author
Zhang, Yilin LU
supervisor
organization
alternative title
Sensorkalibrering för mikrobiell riskanalys i vatten
course
VVRL01 20251
year
type
M2 - Bachelor Degree
subject
keywords
Sensor, calibration, microbial risk, TLF
publication/series
TVVR 4000
report number
TVVR25/4003
ISSN
1101-9824
language
English
additional info
Examiner; Linus Zhang
id
9188024
date added to LUP
2025-05-15 08:42:24
date last changed
2025-05-15 08:42:24
@misc{9188024,
  abstract     = {{In the background of intensifying global climate change and rapid urbanisation, the frequent occurrence of extreme hydrological events and the increase in surface pollution pose serious challenges to the environmental quality of water bodies. Moreover, with the significant increase in public awareness of environmental protection, higher demands have been placed on water quality monitoring techniques, and novel monitoring techniques have been developed. In this study, a novel in situ fluorescence sensor, VLux TPro, was used in combination with laboratory OD measurements in the Vombsjön watershed, Sweden, in order to assess the water quality in the region as well as the applicability and stability of the sensor. The results of the study showed that (1) DOM in the watershed mainly originated from terrestrial sources of humus (TLF/FDOM ratio around 0.1), and no obvious anthropogenic pollution or algal outbreaks were detected, which was ecologically sound; and (2) the VLux TPro sensor demonstrated relatively good stability (linear regression of ABS versus OD360 R²= 0.798) and its TLF monitoring data were reliable. The study confirms that the sensor can monitor microbial risk in real time, has fast response characteristics, and shows important application prospects in water plant process optimisation and pollution early warning.}},
  author       = {{Zhang, Yilin}},
  issn         = {{1101-9824}},
  language     = {{eng}},
  note         = {{Student Paper}},
  series       = {{TVVR 4000}},
  title        = {{Sensor calibration for microbial risk analysis in water}},
  year         = {{2025}},
}