The use of wastewater from treatment plants, which constitutes a cheap source of nitrates, represents an interesting opportunity for the development of innovative bioprocesses enabling the simultaneous removal of H2S and nitrates.
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In this study, a semi-pilot scale biotrickling filter [BTF] was operated in a continuous co-current mode to remove high concentration of hydrogen sulfide [H2S] at optimum operational conditions. The early startup period of 6 days was needed, and then stable removal of H2S gas at inlet concentrations up to about 2000 ppm was successfully obtained at gas retention time [GRT] of 15 min and liquid recirculation rate [LRR] of 120 ml/min. The elimination capacities [ECs] increased linearly with increase in H2S loading rates [HLRs up to 38.5 g/m3 h], but a gradual decrease in removal efficiency was observed from a volumetric HLR of 18.1 g/m3 h. The LRR was further decreased from 120 to 30 ml/min, and the minimum liquid–gas ratio of 0.24 was found without decrease in removal efficiency. The MiSeq analysis revealed the presence of sulphur oxidizing bacteria [SOB] dominated by Acidithiobacillus caldus [>97%] at all portions of BTF.
Funding Information: The study was carried out with research grants from Halla-OMS, CET-ENG and Korea-India S&T Cooperation Program [NRF-2016K1A3A1A19945953]. This study was carried out with the support of MOTIE and KETEP [20172020108940].
Funding Information: The study was carried out with research grants from Halla-OMS, CET-ENG and Korea-India S&T Cooperation Program [NRF-2016K1A3A1A19945953]. This study was carried out with the support of MOTIE and KETEP [ 20172020108940 ].
- Acidithiobacillus caldus
- Biotrickling filter [BTF]
- Gas retention time
- Hydrogen sulphide [HS]
- Inlet loading rate
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Will a carbon filter remove hydrogen sulfide from air?
Treating the effluent air stream with activated carbon has been found to be one of the best ways to remove hydrogen sulfide. Most standard activated carbons have little capacity for H2S. However, General Carbon carries both impregnated and non-impregnated high H2S capacity carbons.
What is the best adsorbent to remove hydrogen sulfide from biogas?
The results confirmed the adsorption of H2S on laterite materials. Therefore, laterite can be the promising adsorbent of removing H2S from biogas.
Can you filter H2S?
Fortunately, hydrogen sulphide is effectively removed from air and biogas applications by using molecular filtration.
What are the technologies for removal of hydrogen sulfide H2S from biogas?
Common H2S removal technologies for H2S removal from biogas fall into one of the following: [1] absorption into a liquid either water or caustic solution; [2] adsorption on a solid such as iron oxide based materials, activated carbon or impregnated activated carbon and [3] biological conversion by which sulfur ...