2, Waste residue: For toxic and harmful waste residue, it needs to undergo special treatment, such as incineration, chemical treatment, etc. to ensure that it will not cause harm to the environment and human health.
3, waste gas: it can be treated by activated carbon adsorption, water washing, acid and alkali neutralization, etc., in order to remove the harmful substances in the waste gas before it is discharged into the atmosphere. For certain organic waste gas, new technologies such as photocatalyst and biodegradation can be used for treatment.