Method for removing heavy metal chromium through mixed biological calcination

The invention discloses a method for removing heavy metal chromium through mixed biological calcination, and relates to the technical field of biochar water treatment. Comprising the following steps: treating crayfish shells; crayfish shells are subjected to decontamination, sterilization, residue removal and smashing treatment, the crayfish shells and tea seed shells are mixed, the mixture is fully stirred, the stirred mixture is dried and calcined, the dried mixture is put into a pyrolysis furnace, and pyrolysis is conducted according to certain heating and heat control logic. According to the invention, the inert gas is filled through the initial reaction atmosphere and is used as an isolation layer of the biological mixture and air, so that the biological mixture is effectively prevented from being contacted with the air to be carbonized during initial preheating, on one hand, the subsequent oxygen supply amount is conveniently controlled, and the conditions of insufficient carbonization and coking failur