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Experimental research on the selected biofiltration materials under dynamic conditions

Abstract

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.


Article in English.


Eksperimentinis pasirinktos biofiltracijos medžiagos tyrimas dinaminėmis sąlygomis


Santrauka


Vandenilio sulfidas (H2S) yra vienas iš nepageidaujamų toksiškų cheminių junginių, esančių biodujose, todėl jį reikia pašalinti. Šių dujų biofiltravimas yra aplinkai nekenksmingas būdas. Įprastą biofiltrą sudaro filtravimo medžiaga kaip sieros oksiduojančių bakterijų gyvenamoji vieta. Siekiant optimizuoti H2S pašalinimo efektyvumą, eksperimentų metu turi būti įvertinta pasirinktų organinių filtravimo medžiagų fizikinių ir cheminių savybių įtaka biofiltravimo procesui. Tyrimo metu buvo nagrinėtos svarbiausios nuotekų dumblo mėginių charakteristikos ir bioanglis (po pirolizės: 400 °C, 500 °C ir 600 °C), taip pat akytojo betono atliekos ir poliuretano putos. Filtravimo medžiagų pasirinktos frakcijos buvo: mažesnės nei 0,6 mm ir nuo 0,6 mm iki 1 mm. Atlikti matavimai apėmė tūrinį tankį, pH ir elektrinį laidumą bei buvo aptartas šių savybių poveikis H2S valymui iš biodujų.


Reikšminiai žodžiai: H2S šalinimas, biofiltravimas, pakavimo medžiagos, fizikinės ir cheminės savybės.

Keyword : H2S removal, biofiltration, packing materials, physicochemical properties

How to Cite
Mohammadi, K., & Vaiškūnaitė, R. (2024). Experimental research on the selected biofiltration materials under dynamic conditions. Mokslas – Lietuvos Ateitis / Science – Future of Lithuania, 16. https://doi.org/10.3846/mla.2024.21297
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May 31, 2024
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