Immobilised activated sludge based biosensor for biochemical oxygen demand measurement
Författare
Summary, in English
A biochemical oxygen demand (BOD) sensor, based on an immobilised mixed culture of microorganisms in combination with a dissolved oxygen electrode, has been developed for the purpose of on-line monitoring of the biological treatment process for waste and wastewater. The sensor was designed for easy replacement of the biomembrane, thereby making it suitable for short-term use. The drawbacks of activated sludge based sensor, such as short sensor lifetime, were thereby circumvented. The sensor BOD measurements were carried out in the kinetic mode using a flow injection system, resulting in 25 s for one measurement followed by 4-8 min recovery time. Based on the results of normalised sensor responses, the OECD synthetic wastewater was considered to be a more suitable calibration solution in comparison with the GGA solution. Good agreement was achieved between the results of the sensor BOD measurement and those obtained from BOD5 analysis of a wastewater sample from a food-processing factory. Reproducibility of responses using one sensor was below +/-5.6% standard deviation. Reproducibility of responses using different sensors was within acceptable bias limits, viz. +/-15% standard deviation.
Avdelning/ar
Publiceringsår
2000
Språk
Engelska
Sidor
883-893
Publikation/Tidskrift/Serie
Biosensors & Bioelectronics
Volym
14
Issue
12
Dokumenttyp
Artikel i tidskrift
Förlag
Elsevier
Ämne
- Industrial Biotechnology
Nyckelord
- Biochemical oxygen demand
- Activated sludge
- Microbial consortium
- Kinetic mode
- Dynamic mode
- Wastewater
- BOD sensor
Status
Published
ISBN/ISSN/Övrigt
- ISSN: 1873-4235