Immobilised activated sludge based biosensor for biochemical oxygen demand measurement
In: Biosensors & bioelectronics, Jg. 14 (2000), Heft 12, S. 883-893
academicJournal
- print, 27 ref
Zugriff:
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.
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Immobilised activated sludge based biosensor for biochemical oxygen demand measurement
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Autor/in / Beteiligte Person: | JING, LIU ; BJÖRNSSON, L ; MATTIASSON, B |
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Zeitschrift: | Biosensors & bioelectronics, Jg. 14 (2000), Heft 12, S. 883-893 |
Veröffentlichung: | Lausanne: Elsevier Science, 2000 |
Medientyp: | academicJournal |
Umfang: | print, 27 ref |
ISSN: | 0956-5663 (print) |
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