Back To ASIM User Forum | Submit A Message | Reply To This Message
From: laila bahgat
I need to find the stiochiometric matrix related to model ASM3 + the EAWAG module for Bio-P removal using default parameters, The one published in WST needs performing some calculation. Can someone provide any help from this respect? Thanks.
Laila, I can send you the Bio-P model for ASIM. You have to copy it into the \text subdirectory. Then the model can be loaded from ASIM by choosing Model/Load ASIM Model. Kind regards, Rolf
Thank you for your help and for sending me the files. If I may ask for further help (really I am bothering you with an issue that is not related to WinASIM): The only copy I have related to the EAWAG Bio-P module is the one published in Wat. Sci. Tech. Vol. 45 no.6 pp. 61-67. The matrix published there represents only the additional 11 processes related to the module and only the process rates of these 11 processes. Now it is stated in the mentioned paper that Bio-P module adds P removal to ASM3 both physiological P uptake during growth and enhanced biological P removal (EBPR) of PAO. The module of 11 additional processes describes EBPR and for the physiological P uptake the growth processes of ASM3 must be completed by terms for the physiological limitation. Through your help I now have the complete ASM3 + Bio-P stoichiometric matrix but I don't know whether I can use the same proccess rates of ASM3 as provided in the original models or these need to be completed by terms for phosphorous limitation to account for physiological P uptake as stated earlier. I'll very much appreciate it if you'll clarify this issue and if the ASM3 processes need some modification, is it possible to easily find the complete set of process rates? Thank you very much for your interest and for dedicating some time to enquiries not related to this forum.
I don't understand your question. Process kinetics and rate constants are already included in the model. So you don't need to input them. But I am not a modeling expert. Maybe another paper may clarify your question: 'The EAWAG Bio-P Module for Activated Sludge Model No. 3', L. Rieger et al. in Water Research Vol.35, No.16, pp. 3887-3903, 2001. There the model is described more detailed than in the paper you mentioned. Kind regards, Rolf
Thank you for answering my message and for the information about the second paper. As my question was unclear I'll try to rephrase it. An ASM model is usually presented as a stoichiometric matrix accompanied with a table for the kinetic rate expressions. Since it was mentioned that to use the Bio-P module with ASM3, ASM3 must be completed by terms for phosphorous physiological limitation, I understood from this statement that the kinetic expressions of ASM3 need some adjustment along with the additional 11 processes of the Bio-P module. Am I wrong there? Thank you for your continuous help.