Waste gas treatment is the process of purifying harmful gases emitted from industries, daily life, etc. Through technologies such as adsorption, combustion, and catalysis, dust, sulfides, nitrogen oxides, and other pollutants are removed, which is an important part of environmental protection and governance.

Wastewater treatment is a process that uses physical, chemical and biological methods to remove pollutants such as organic substances, heavy metals and suspended solids from wastewater.