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Abstract

A laboratory scale bioreactor has been designed and set up in order to degrade hydrogen sulfide from an air stream. The reactor is a vertical column of 7 litre capacity and 1 meter in height. It is divided into three modules and each module is filled with pellets of agricultural residues as packing bed material. The gas stream fed into the reactor through the upper inlet consists of a mixture of hydrogen sulfide and humidified air. The hydrogen sulfide content in the inlet gas stream was increased in stages until the degradation efficiency was below 90%. The parameters to be controlled in order to reach continuous and stable operation were temperature, moisture content and the percentage of the compound to be degraded at the inlet and outlet gas streams (removal or elimination efficiency). When the H2S mass loading rate was between 10 and 40 g m(-3) h(-1), the removal efficiency was greater than 90%. The support material had a good physical performance throughout operation time, which is evidence that this material is suitable for biofiltration purposes.

Data Driven Modelling and Control Strategies to Improve Biogas Quality and Production from High Solids Anaerobic Digestion: A Mini Review

“…Biological removal. Biofiltration consists of wet beds in which many microorganism species are capable of degrading sulfur compounds [56]. The final concentration of H 2 S mainly depends on porosity, temperature, pH, humidity and H 2 S initial concentration in the gas phase.…”

Desorption and Biofiltration for the Treatment of Residual Organic Gases Evolved in Soil Decontamination Processses

“…Thus, the overall diameter of the pellets was 10.36 ± 1.94 mm and the overall length was 5.89 ± 0.18 mm. The compost was stored in sealed plastic bags at room temperature, and its complete characterization can be found elsewhere [23].…”