Microbial kinetic for In-Storage-Psychrophilic Anaerobic Digestion (ISPAD)

Madani-Hosseini, Mahsa; Mulligan, Catherine N.; Barrington, Suzelle

doi:10.1016/j.jenvman.2014.07.028

Cited by 5 publications

(6 citation statements)

References 72 publications

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“…Table 5 compared the kinetic coefficients obtained in this study using 2012 ISPAD inoculum, to that of a previous study (Madani-Hosseini et al, 2014) using 2009 ISPAD inoculum and that of another research conducted at 6 °C but for cattle manure. Model fitting of the AD experimental data was used to establish the 2012 ISPAD kinetics values.…”

Section: Estimated Kinetic Parameters and Conversion Factorsmentioning

confidence: 99%

“…Whereas the Keshtkar et al (2001) model only considers one operating temperature, the ISPAD model must include a temperature function for the maximum microbial growth rate, , and the acid/base dissociation constant ( ). Such temperature effect can be defined by the Arrhenius and Square Root equations (Madani-Hosseini, Barrington, & Mulligan, 2014).…”

Section: Selecting the Most Appropriate Base For The Ispad Modelmentioning

confidence: 99%

“…The ISPAD system depends on microbial acclimation to low temperatures and low organic loads diluted over time as the system fills up. The developed ISPAD model will be initialized using kinetic values estimated for each AD group from 2009 ISPAD samples tested in the laboratory using substrate activity tests, and then fitted by Madani-Hosseini et al (2014) to the Monod equation. Such initial kinetic values facilitate the fitting process using experimental data with less chance of being trapped in local minima.…”

Section: Selecting the Most Appropriate Base For The Ispad Modelmentioning

confidence: 99%

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In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process. Part I: Model Development and Calibration

Hosseini¹,

Mulligan²,

Barrington³

2015

EMSD

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In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) is a treatment system applicable to wastewaters stored for over 100 days, such as livestock wastes and municipal sludge. The ISPAD system differs from conventional reactors by being a sequentially fed batch process operating at a temperature fluctuating with ambient. The objective of this study was to develop a mathematical model to simulate the ISPAD process, verify the value of its microbial kinetics, and to simulate the pH evolution of its content along with its methane (CH 4 ) production. Furthermore, the values of the ISPAD microbial kinetics were compared to that of previous years to track for further acclimation to psychrophilic conditions. Simulation of ISPAD was achieved using the Simulink/Matlab software. The model was calibrated using laboratory data obtained from batch experiments using 7-year-old ISPAD inoculum, and glucose as substrate, and where glucose, VFAs and pH changes were monitored along with biogas production. The ISPAD model showed good agreement with the experimental data representing the system behaviour between 4 and 35 º C. Although microbial activity at 4 °C was much slower than that at 18 and 35 º C, it showed acclimation to low temperatures. Furthermore, comparison of microbial kinetic values over 3 years of field ISPAD monitoring demonstrated continued population acclimation, especially for the methanogens.

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Section: Estimated Kinetic Parameters and Conversion Factorsmentioning

confidence: 99%

Section: Selecting the Most Appropriate Base For The Ispad Modelmentioning

confidence: 99%

Section: Selecting the Most Appropriate Base For The Ispad Modelmentioning

confidence: 99%

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In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process. Part I: Model Development and Calibration

Hosseini¹,

Mulligan²,

Barrington³

2015

EMSD

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“…Therefore, the kinetic parameters obtained by Madani-Hosseini et al (2014a) and the ISPAD model built for a batch fed system produced a tool capable of predicting the behaviour of ISPAD inoculum when glucose was used as substrate under temperatures ranging from 4 to 35 °C. This model needs to be further refined using data obtained from prototype testing and field applications.…”

Section: =078mentioning

confidence: 99%

“…The ISPAD system is a long term sequentially fed batch operation functioning under ambient temperature, where wastewater is added sequentially over the treatment period of at least 100 days. Using as base the Keshtkar, Ghaforian, Abolhamd, and Meyssami (2001) model developed for batch systems, a new mathematical model was developed to predict the specific behaviour of the ISPAD process (M. Madani-Hosseini, S. Barrington, & C. Mulligan, 2014a; M. Madani-Hosseini, S. Barrington, & C. Mulligan, 2014b). The proposed model was calibrated with experimental data obtained with ISPAD inoculum fed glucose as substrate.…”

Section: Introductionmentioning

confidence: 99%

In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process. Part II: Model Validation

Hosseini¹,

Mulligan²,

Barrington³

2015

EMSD

Self Cite

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In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) is a sequentially fed batch treatment system operating at a temperature fluctuating with that of ambient. Because of its specific operation modes and the acclimation of its microbial groups, its microbial kinetics were determined from laboratory data, and a specific mathematical model was developed to simulate its process and to optimize its management. The objective of this study is therefore to validate this ISPAD model using further laboratory data obtained from batch tests conducted in flasks. For this purpose, glucose at 630 mg/L, was fed to 8-year-old ISPAD inoculum and digested at 18 °C. Changes in glucose, VFAs and pH were monitored along Environmental Management and Sustainable Development ISSN 2164-7682 2015 www.macrothink.org/emsd 194 with biogas production. The cross-validated coefficient of determination ( ) was used to determine the fit between the model prediction and the experimental values. The ISPAD model was able to strongly predict glucose degradation, VFAs, pH, and methane. However, the model weakly predicted the early CO 2 changes over time, likely because of its water solubility.

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Acidification of In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process to reduce ammonia volatilization: Model development and validation

2016

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Microbial kinetic for In-Storage-Psychrophilic Anaerobic Digestion (ISPAD)

Cited by 5 publications

References 72 publications

In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process. Part I: Model Development and Calibration

In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process. Part I: Model Development and Calibration

In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process. Part II: Model Validation

Acidification of In-Storage-Psychrophilic-Anaerobic-Digestion (ISPAD) process to reduce ammonia volatilization: Model development and validation

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