Waste-gas-treatment method for hermetia-illucens breeding

The invention discloses a waste-gas-treatment method for hermetia-illucens breeding. The method includes the following steps of S1, spraying liquid preparing, wherein preparing is carried out according to the mass ratio of ferric chloride to magnesium sulfate to ferrous sulfate to calcium superphosphate to water of (1.5-4.5):(0.8-1.2):(2-4):(20-30):300, the magnesium sulfate is dissolved in water,then the ferrous sulfate is added, the mixture is mixed to be even and dissolved, then the calcium superphosphate is added, the mixture is stirred and mixed to be even, and spraying liquid is obtained; S2, waste-gas treating, wherein breeding waste gas in the hermetia-illucens breeding environment is sucked, the spraying liquid is heated to 60 DEG C to 70 DEG C to spray the sucked waste gas, themixed liquid after spraying treatment enters a settling pond and is settled and filtered, the filtered liquid is heated to 60 DEG C to 70 DEG C, and then serves as spraying liquid again to spray wastegas, the operation is repe