Combined titrimetric respirometer as a real-time sensor to monitor the aerobic biodegradation process of different substrates

Hoque, M. A. and Aravinthan, V. and Pradhan, N. M. and Sakhiya, A. (2011) Combined titrimetric respirometer as a real-time sensor to monitor the aerobic biodegradation process of different substrates. Journal of Applied Sciences, 11 (13). pp. 2299-2305. ISSN 1812-5654

Abstract

Off-line analysis of liquid phase samples have traditionally been used for the determination of organics and nitrogen load for process control or optimization in full-scale wastewater treatment plants. However, these sampling and analysis methods are labor-intensive and time-consuming. Besides, the results are not generally available on real-time to the operators who struggle on daily basis to meet the constant discharge license conditions of the effluent while the influent conditions change diurnally with varying loads. Combined respirometric titrimetric sensor is an on-line method that has been developed recently, indicating the oxygen demand exerted by organic and nitrogen loadings. This sensor monitors both the oxygen uptake as well as the proton production/consumption resulting from the biological reactions in activated sludge system. The basic-data can then be interpreted to find out the short-term BOD, which can be used effectively for process control and optimization. Data interpretation and model development are still in progress as researchers keep on unraveling the mystery of how the substrates are biodegraded by activated sludge. Hence, in this study, it is aimed to develop an in-depth understanding about the aerobic biodegradation process using real-time biosensors through addition of different substrates such as acetate, surfactant (SDS) and ammonium to batch cultures of activated sludge by maintaining the pH of 7.8. Basic data interpretation was carried out to calculate oxygen uptake rate (OUR) as well as proton production/consumption rate from the raw data. Besides, the improved bio-kinetic model calibration was presented in this paper explaining the oxidation of different substrates in activated sludge system.


Statistics for USQ ePrint 19818
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Pagination of 2009 Conference copy is pp.454-460.
Depositing User: Dr Vasantha Aravinthan
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 22 Mar 2012 12:31
Last Modified: 03 Jul 2013 00:49
Uncontrolled Keywords: oxygen uptake rate; OUR; proton; activated sludge; substrate; biodegradation
Fields of Research (FOR2008): 09 Engineering > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling
09 Engineering > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.3923/jas.2011.2299.2305
URI: http://eprints.usq.edu.au/id/eprint/19818

Actions (login required)

View Item Archive Repository Staff Only