Model-based optimization of microaeration for biogas desulfurization in UASB reactors

Pokorná-Krayzelová, Lucie; Mampaey, Kris E.; Vannecke, Thomas; Bartacek, Jan; Jenı́ček, P.; Volcke, Eveline

doi:10.1016/j.bej.2017.06.009

Cited by 36 publications

(13 citation statements)

References 43 publications

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“…We assume that biochar functions here as an effective sorbent agent, a property that has already been reported for soil and other aqueous environments [57]. This is important since H 2 S negatively affects human health and causes major problems in biogas facilities due to its corrosive properties damaging metal compounds of bioreactors, sensors, gas turbines and biogas upgraders [58,59]. Our data show that biochar addition might be a potential approach for managing H 2 S problems in AD.…”

Section: Gas Measurement and Physico-chemical Analysissupporting

confidence: 54%

Can the addition of biochar improve the performance of biogas digesters operated at 45°C?

Masebinu

Fanoro

Insam

et al. 2021

Environmental Engineering Research

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Biogas from anaerobic digestion (AD) may contribute towards a green energy scene in the future. Despite many benefits, AD plant operators are still challenged by limitations of the technology. This study aimed at evaluating the effect of biochar addition to AD reactors operated at 45°C to optimize productivity, efficiency and stability of the process. Biochar is characterized by a large surface area and may therefore facilitate the creation of biofilms on the one hand and remove environmental contaminants on the other hand. Moreover, biochar may serve as pH control agent due to its alkaline properties, counteracting reactor acidification. Our results showed that the addition of biochar reduced efficiently the amount of H2S that initially occurred in the headspace during reactor start-up. Nevertheless, no impact on biogas- and methane yields was observed. This might be explained with an already well-working AD system without any severe disturbances, where the balancing nature of biochar did hardly count. Future studies, however, need to evaluate the effect on stressed systems. The microbiome analysis provided a detailed view of the microbial dynamics during the start-up phase, revealing Methanosarcina as dominant methanogen in the end. The addition of biochar did not alter the microbial community composition.

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Section: Gas Measurement and Physico-chemical Analysissupporting

confidence: 54%

Can the addition of biochar improve the performance of biogas digesters operated at 45°C?

Masebinu

Fanoro

Insam

et al. 2021

Environmental Engineering Research

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“…Furthermore, modeling is recognized as one the future needs to be addressed in AD [10]. Recent studies have developed models for the microaerobic process in AD, for both liquid effluents and for systems with immobilized biomass, UASB [11] and biotrickling filters [12]. Therefore, to the best of our knowledge, no mathematical model has been so far adapted and implemented for the microaerobic H 2 S removal during sewage sludge AD in a continuous stirred reactor.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modelling of in-situ microaerobic desulfurization of biogas from sewage sludge digestion

Donoso‐Bravo¹,

Sadino-Riquelme

Díaz

et al. 2018

Biotechnology Reports

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“…For modeling of anaerobic digestion, the generally accepted Anaerobic Digestion Model no.1 (ADM1) (Batstone et al, 2002) is used. In Pokorna-Krayzelova et al (2017b), ADM1 was extended by sulfur reactions (sulfate reduction and sulfide oxidation) in anaerobic/microaerobic fermenters. The resulting model ADM1-S/O was later extended by chemical oxidation of hydrogen sulfide (Pokorna-Krayzelova et al, 2018b).…”

Section: Model-based Optimizationmentioning

confidence: 99%

Biological H₂S removal from gases

Andreides¹,

Pokorná-Krayzelová²,

Bartáček³

et al. 2020

Environmental Technologies to Treat Sulphur Pollution: Principles and Engineering

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Hydrogen sulfide (H 2 S) is an odorous and poisonous gas present in biogas (the main product of anaerobic digestion), in sour gas (i.e. natural gas with a high content of H 2 S) or in general in the gases coming as a concomitant with crude oil extraction. H 2 S can also be produced abiotically, e.g. through the reaction of anhydrite and hydrocarbons as reported in deep carbonate gas reservoirs (Worden & Smalley, 1996). In environmental engineering applications, H 2 S is most often generated during anaerobic fermentation of substrates containing sulfur compounds. Sulfate-reducing bacteria (SRB) with a respiratory metabolism use sulfate as an electron acceptor while producing sulfide, which is toxic both in its liquid as well as in its gaseous form. Gaseous hydrogen sulfide causes the corrosion of concrete and steel digesters (see Chapter 5) and other equipment such as pipes, burners and combined heat and power (CHP) units, which increases the operational costs since the engine oil is acidified and its replacement interval is significantly shortened. While burning, the acid rain precursors SO 2 and SO 3 are emitted to the environment. Last but not the least, gaseous hydrogen sulfide is extremely toxic and causes health risks for the operators of fermenters and sewer maintainers. The olfactory nerve responding to the smell of hydrogen sulfide is paralyzed after a few inhalations of 100-150 ppm,

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Model-based optimization of microaeration for biogas desulfurization in UASB reactors

Cited by 36 publications

References 43 publications

Can the addition of biochar improve the performance of biogas digesters operated at 45°C?

Can the addition of biochar improve the performance of biogas digesters operated at 45°C?

Mathematical modelling of in-situ microaerobic desulfurization of biogas from sewage sludge digestion

Biological H₂S removal from gases

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Model-based optimization of microaeration for biogas desulfurization in UASB reactors

Cited by 36 publications

References 43 publications

Can the addition of biochar improve the performance of biogas digesters operated at 45°C?

Can the addition of biochar improve the performance of biogas digesters operated at 45°C?

Mathematical modelling of in-situ microaerobic desulfurization of biogas from sewage sludge digestion

Biological H2S removal from gases

Contact Info

Product

Resources

About

Biological H₂S removal from gases