The invention relates to a method for producing polysaccharides containing -1,4-glucan chains. Each module comprises a first electronic interface for receiving data from the platform and for data communication among the plurality of modules during operation of the platform. The catalyst is a layered structure with a dense core and an active catalytic outer layer. That is, the circuit chip is provided between a bottom wall surface of the recess and the sensor chip. The detergent holder is provided with a water hole and a detergent hole, which are in communication with a water duct of the barrel. When the air-fuel ratio of the exhaust gas is lean, the storing catalyst cold stores the NO2 contained in the exhaust in the absorbent when the catalyst is inactive and hot stores the cold stored NO2 in the absorbent when the catalyst is made active.