Mathematical modelling of autothermal thermophilic aerobic digesters

Gómez, Jairo; Gracia, M. de; Ayesa, E.; García-Heras, J. L.

doi:10.1016/j.watres.2006.11.042

Cited by 39 publications

(11 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Biological reactions and energy balances were considered [27]. The biochemical model (Figure 1b) was based on the standard ASM1 with slight modifications to make it consistent with observations from the ATAD reactors (acid-base reactions and liquid-gas transfers).…”

Section: Steady-state Analysis Of the Atadmentioning

confidence: 99%

Dual-Control of Autothermal Thermophilic Aerobic Digestion Using Aeration and Solid Retention Time

Nájera

Gil-Martínez

Rico-Azagra

2017

Water

View full text Add to dashboard Cite

Autothermal thermophilic aerobic digestion (ATAD) is an advanced sewage sludge treatment which allows compliance with increasingly demanding regulations. Concerning sludge pasteurization, a certain average temperature must be assured in the digester during batch treatment. Aeration flow is the variable most manipulated to regulate the digester temperature. Additionally, the manipulation of the batch sludge flow-which is related to the solid-retention-time-is considered to improve temperature regulation despite variations in air and sludge temperatures and the variability of raw sludge organic content. Thus, a dual-input control structure was provided where the aeration and solid-retention-time contributed as faster and slower inputs, respectively. Two controllers intervened, and the set-point for the batch average temperature was chosen to meet the minimum effluent quality established by the US regulations or European recommendations, considering that lower set point temperatures save aeration costs. A set-point for the aeration allowed us to achieve an extra goal, which aimed at either reducing operation costs or increasing production rates. The two feedback controllers were designed following the robust control methodology known as quantitative feedback theory (QFT). Improvements were compared with single-input (aeration-flow) control strategy and open-loop control strategy. Simulations were performed on a benchmark non-linear simulation model for ATAD.

show abstract

Section: Steady-state Analysis Of the Atadmentioning

confidence: 99%

Dual-Control of Autothermal Thermophilic Aerobic Digestion Using Aeration and Solid Retention Time

Nájera

Gil-Martínez

Rico-Azagra

2017

Water

View full text Add to dashboard Cite

show abstract

“…Based on the dominance of the ASM1 model in the field, its extension to the ATAD process as set out by Gomez et al (2007) appears to create a de facto standard for modeling this process. The drawbacks of the model are also obvious .…”

Section: Models Of Asp and Atadmentioning

confidence: 99%

Finite-Dimensional Methods for Optimal Control of Autothermal Thermophilic Aerobic Digestion

Grigorieva¹,

Бондаренко²,

Хайлов³

et al. 2012

Industrial Waste

View full text Add to dashboard Cite

show abstract

“…Therefore, pH and ORP were effected by dissolved oxygen and ammonia nitrogen levels. In order to avoid the shortcomings of existing equation proposed in the ADM1 of IWA, a new practical mathematical model with the ATAD process was developed for pre-treating klebsiella pneumoniae strains [9]. Based on the Monod equation, the colony growth rate of thermophilic microorganism can be defined as follows:…”

Section: B the Effects Of Ph And Oxidation-reduction Potentialmentioning

confidence: 99%

Study on Pretreatment and Kinetics of Waste Klebsiella Pneumoniae by the Autothermal Thermophilic Aerobic Digestion Process

Liu

Lin

Chen

et al. 2011

2011 Third International Conference on Measuring Technology and Mechatronics Automation

View full text Add to dashboard Cite

A innovative pretreatment technique and its kinetics for treating waste klebsiella pneumoniae strains from 1 3-propanediol (1,3-PD) fermented product by autothermal thermophilic aerobic digestion (ATAD) process were investigated in laboratory scale to inactivate and reduce pathogens, which was a pretreatment process of the up-flow anaerobic sludge bed (UASB). The feed total suspended solids (TSS) pH value, Redox potential temperature released by self-heating and the numbers of pathogens were conducted. The results showed that TSS removal rate and the temperature reached 62.75% and 65 respectively the pathogens' removal rate was 100% the results from new kinetic model developed for the ATAD process had a good agreement with actual results.

show abstract

Mathematical modelling of autothermal thermophilic aerobic digesters

Cited by 39 publications

References 11 publications

Dual-Control of Autothermal Thermophilic Aerobic Digestion Using Aeration and Solid Retention Time

Dual-Control of Autothermal Thermophilic Aerobic Digestion Using Aeration and Solid Retention Time

Finite-Dimensional Methods for Optimal Control of Autothermal Thermophilic Aerobic Digestion

Study on Pretreatment and Kinetics of Waste Klebsiella Pneumoniae by the Autothermal Thermophilic Aerobic Digestion Process

Contact Info

Product

Resources

About