Latest progress in bio-trickling filter technology for the purification of biogas

This article is introducing the latest progress and important results of bio-trickling filter for the purification of biogas. The paper summarized the mechanism of bio-trickling filter, the selection of bacterial species, and the automatical control system of the reactor. The survey also indicated that the main parameters such as pH, dissolved oxygen (DO), residence time and fillers are the critical factors in the bio-desulfurization process. However, this technology is not so immature that more intensive research activities are needed to improve the process of bio-desulfurization. This paper may provide reference for further research in the purification of biogas.