Application of Response Surface Methodology for H2S Removal from Biogas by a Pilot Anoxic Biotrickling Filter
Abstract
:1. Introduction
2. Materials and Methods
2.1. Experimental Set-up
2.2. Experimental Design
2.3. Ottengraf’s Model
- There is no diffusion limitation and the biofilm is fully active, and hence the conversion rate is controlled by a zero-order reaction rate. The solution is described by Equation (6). K0 is a pseudo zero-order rate (g·m−3·s−1) and is proportional to the zero-order reaction rate constant (k0, Equation (7)).
- There is diffusion limitation and therefore the mass transfer rate to the biofilm is insufficient compared to biological substrate utilization rate. The solution is described by Equation (8).
- There is no diffusion limitation and the biofilm is fully active, and hence the conversion rate is controlled by a first-order reaction rate. The solution is described by Equation (6). K1 is a pseudo first-order rate constant (s−1) (Equation (10)) and is proportional to the first-order rate constant (k1, Equation (10)).
3. Results and Discussion
3.1. Empirical Model
3.2. Ottengraf’s Model
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Factor | Levels of Factors | ||
---|---|---|---|
(–1) | (0) | (+1) | |
FG (m3·h−1) | 1 | 3 | 5 |
FL (m3·h−1) | 1 | 2 | 3 |
[N-NO3−] (mg·L−1) | 1.4 ± 1.1 | 35.3 ± 2.4 | 70.5 ± 10.2 |
IL1 (gS·m3·h−1) | 35.1 ± 1.5 | 109.1 ± 11.7 | 172.4 ± 3.4 |
TLV2 (m·h−1) | 5.09 | 10.18 | 15.27 |
EBRT1 (s) | 600 | 200 | 120 |
TLV (m·h−1) | EBRT (s) 1 | ||
---|---|---|---|
600 | 200 | 120 | |
5.09 | 99.39 | 84.73 | 79.31 |
10.18 | 99.24 | 93.08 | 83.06 |
15.27 | 99.53 | 97.65 | 92.13 |
Factor | ‘C Model’ | ‘EC Model’ | ||
---|---|---|---|---|
Maximum | Minimum | Maximum | Minimum | |
TLV | 0.0078 | –0.1579 | 4.3303 | –1.252 |
IL | 0.0177 | 0.0045 | 1.1553 | 0.1657 |
[N-NO3−] | 0.0038 | –0.159 | 0.4363 | –0.1801 |
IL (gS·m−3·h−1) | TLV (m·h−1) | Zero-Order Diffusion | Zero-Order Kinetic | First-Order Kinetic | |||
---|---|---|---|---|---|---|---|
r2 | k (s−1) | r2 | k (s−1) | r2 | k (s−1) | ||
36 | 5.09 | 0.62 | 0.0018 | 0.3 | 0.012 | 0.95 | 0.008 |
35 | 10.18 | 0.57 | 0.0018 | 0.26 | 0.012 | 0.92 | 0.0087 |
33 | 15.27 | 0.52 | 0.0018 | 0.22 | 0.011 | 0.93 | 0.0092 |
130 | 5.09 | 0.95 | 0.0011 | 0.94 | 0.011 | 0.93 | 0.0031 |
108 | 10.18 | 0.91 | 0.0012 | 0.82 | 0.01 | 0.93 | 0.0036 |
104 | 15.27 | 0.93 | 0.0014 | 0.77 | 0.01 | 0.96 | 0.0057 |
170 | 5.09 | 0.97 | 0.0009 | 0.96 | 0.0079 | 0.96 | 0.0025 |
176 | 10.18 | 0.88 | 0.001 | 0.79 | 0.0091 | 0.93 | 0.0029 |
167 | 15.27 | 0.86 | 0.0011 | 0.74 | 0.0092 | 0.95 | 0.0034 |
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Almenglo, F.; Ramírez, M.; Cantero, D. Application of Response Surface Methodology for H2S Removal from Biogas by a Pilot Anoxic Biotrickling Filter. ChemEngineering 2019, 3, 66. https://doi.org/10.3390/chemengineering3030066
Almenglo F, Ramírez M, Cantero D. Application of Response Surface Methodology for H2S Removal from Biogas by a Pilot Anoxic Biotrickling Filter. ChemEngineering. 2019; 3(3):66. https://doi.org/10.3390/chemengineering3030066
Chicago/Turabian StyleAlmenglo, Fernando, Martín Ramírez, and Domingo Cantero. 2019. "Application of Response Surface Methodology for H2S Removal from Biogas by a Pilot Anoxic Biotrickling Filter" ChemEngineering 3, no. 3: 66. https://doi.org/10.3390/chemengineering3030066