Fillers in purification of waste gas by biological trickling filter method

This paper summarizes the working principle of biological trickling filter method and the equipment of biological trickling filter tower, and carries out simple classification on biological fillers. As for a single filler, there exists problems that biological compatibility, strength and porosity and other properties cannot be compatible, the relevant scholars put forward some methods such as filler modification and fillers combination to improve the performances of biological trickling filter tower, and reduce possibilities of packing compaction, difficulty in hanging film, blocking and channeling and so on. At present, the development of new biological fillers is difficult. This paper proposes to strengthen research on combination and modification of fillers.