An implementation of the hybrid respirometric measurement principle with more reliable oxygen uptake rate (OUR) measurement

The aim of this paper is to realize fully the hybrid respirometric measurement principle with high accuracy and measuring frequency. Based on the knowledge of the difficulty in implementing "ultimate" hybrid respirometer and the drawbacks of the simpler hybrid respirometer, a novel implementation of the hybrid respirometric measurement principle was developed. It was verified that the new hybrid respirometer possessed the advantage of "ultimate" hybrid respirometer while its DO electrodes suffered no effect of flow rate change. Also the accurate and constant temperature of the whole set-up was solved. For the purpose of enhancing the availability of the respirometer proposed in this paper, software with friendly user interface was developed, in which advanced arithmetic and median filter were adopted. Finally the new hybrid respirometer system was evaluated and the accuracy and reliability were satisfied.

[1]  Elizabeth A. H. Hall,et al.  Direct toxicity assessment with a mini portable respirometer , 2005 .

[2]  M. C. Tomei,et al.  Toxicity assessment of common xenobiotic compounds on municipal activated sludge: comparison between respirometry and Microtox. , 2004, Water research.

[3]  Gustaf Olsson,et al.  Reviewing, assessing and speculating , 1998 .

[4]  Peter A. Vanrolleghem,et al.  Identification of biodegradation models under model and data uncertainty , 1996 .

[5]  L. de las Fuentes,et al.  Evaluation of wastewater toxicity: comparative study between Microtox and activated sludge oxygen uptake inhibition. , 2002, Water research.

[6]  E. Hall,et al.  Tuning the parameters for fast respirometry , 2002 .

[7]  P. Vanrolleghem,et al.  Full-scale on-line assessment of toxic wastewaters causing change in biodegradation model structure and parameters , 1996 .

[8]  S. Marsili-Libelli,et al.  Accuracy analysis of a respirometer for activated sludge dynamic modelling. , 2002, Water research.

[9]  A. Witteborg,et al.  Respirometry for determination of the influents SS-concentration , 1996 .

[10]  Peter A. Vanrolleghem,et al.  Respirometry as a tool for rapid characterization of wastewater and activated sludge , 1995 .

[11]  Paul Lant,et al.  In situ respirometry in an SBR treating wastewater with high phenol concentrations , 2000 .

[12]  Gustaf Olsson,et al.  Respirometry in control of the activated sludge process , 1996 .

[13]  Peter A. Vanrolleghem,et al.  A hybrid respirometric method for more reliable assessment of activated sludge model parameter , 1998 .