TECHNOLOGY FOCUS - CHEMICAL ENGINEERING - Preferred Apparatus: The biomass adsorption refiner has a biomass adsorption tower (6) packed with biomass, a biomass injection unit (7) for supplying the biomass to an adsorption tower, an inlet (4) for gas generated by the gasifier, and a discharge port (5) of gas. A lower biomass emission unit (8) and an upper biomass emission unit are provided at the lower portion and upper portion of the adsorption tower, respectively. The absorption tower is further equipped with a biomass stirring unit. The biomass gasification system further has an adsorbed biomass transmission unit (9) to transmit the adsorbed biomass emitted from the adsorption tower to the gasifier, as a gasification biomass material, and dust removal apparatus utilizing water-jet stream for the upstream side of the adsorption tower, provided in the gas-purification line. The dust removal apparatus has drive nozzle to suck the generated gas and to form a water-jet stream at the lead direct-axis direction, scrubber portion to clean the generated gas, and circulating the water tank to store the jet-stream water as circulating water. Gas-liquid mixing of water-jet stream and generated gas is carried out such that the jet blast discharge from the drive nozzle is recovered. A suction inner cylinder is arranged in the circulating water tank. The cylinder is equipped with an opening having a weir opposing the opening of the scrubber exit. A discharge pipe to emit the circulating water is arranged in the suction inner cylinder with a circulation pump. A strainer is interposed in the discharge pipe. The liquid level of the suction inner cylinder is always maintained at a level lower than that of the circulating water tank.Preferred Process: The adsorbed biomass is transmitted to the gasifier as adsorption material and utilized as gasification biomass material. Cleaning of generated gas is carried out using water jet stream before carrying out adsorption process using the biomass adsorption agent.