Simultaneous removal of H2S and NH3 from raw biogas in hollow fibre membrane bioreactors

Das, Jewel; Nolan, Stephen; Lens, P.N.L.

doi:10.1016/j.eti.2022.102777

Cited by 17 publications

(2 citation statements)

References 41 publications

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“…Cellular concrete waste may exhibit an H 2 S removal performance of up to 32 (g m -3 h -1 ) (Vaiškūnaitė, 2020). The complex physicochemical interactions between H 2 S and various components of cellular concrete (primarily calcium oxide CaO from calcium silicate hydrate CaO SiO 2 nH 2 O and ferric oxide Fe 2 O 3 ) are responsible for these chemical interactions (Aryal et al, 2022;Das et al, 2022). These interactions result in the transformation of the material's structure into calcium sulfate (gypsum CaSO 4 2H 2 O) and the formation of elemental sulfur (Das et al, 2022).…”

Section: Clc Waste and Pufmentioning

confidence: 99%

“…The complex physicochemical interactions between H 2 S and various components of cellular concrete (primarily calcium oxide CaO from calcium silicate hydrate CaO SiO 2 nH 2 O and ferric oxide Fe 2 O 3 ) are responsible for these chemical interactions (Aryal et al, 2022;Das et al, 2022). These interactions result in the transformation of the material's structure into calcium sulfate (gypsum CaSO 4 2H 2 O) and the formation of elemental sulfur (Das et al, 2022). Table 2 illustrates the outcomes of employing cellular concrete waste samples as packing material in an experiment.…”

Section: Clc Waste and Pufmentioning

confidence: 99%

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Experimental Research on the Selected Biofiltration Materials Under Dynamic Conditions

Mohammadi,

Vaiškūnaitė

2024

Science - Future of Lithuania

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Hydrogen sulfide (H2S) is a hazardous chemical compound present in raw biogas and requires removal. Biofiltration offers an eco-friendly solution by utilizing sulfur oxidizing bacteria (SOBs) within a biofilter. This biofilter typically comprises packing material to house SOBs and facilitate desulfurization. To optimize removal efficiency (RE), the physicochemical properties of packing materials (organic/inorganic/synthetic) need evaluation. This study focused on the characteristics of sewage sludge and biochar samples produced via pyrolysis at temperatures of 400 °C, 500 °C, and 600 °C, along with cellular concrete (CLC) waste and polyurethane foam (PUF). Measurements included bulk density, pH, and electrical conductivity, with discussion on their impact on H2S purification from biogas under dynamic conditions. Ultimately, PUF, CLC waste, biochar after 600 °C pyrolysis, and sewage sludge exhibited superior performance in terms of lowest bulk density, optimal pH, and highest electrical conductivity.

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