What are the terminal treatment methods to control VOCs emission?

The terminal processing and comprehensive utilization of VOCs mainly include the following types.

(1) Encourage the recycling of VOCs in industrial production, giving priority to recycling in production systems.

(2) For the waste gas containing high concentration of VOCs, condensation recovery and adsorption recovery technologies should be given priority for recycling, and other treatment technologies should be supplemented to achieve up-to-standard discharge.

(3) For the waste gas with medium VOCs concentration, adsorption technology can be used to recover organic solvents, or catalytic combustion and thermal incineration technology can be used to purify the waste gas and meet the discharge standards. When catalytic combustion and thermal incineration technology are used for purification, waste heat should be recovered.

(4) For the waste gas containing low-concentration VOCs, adsorption technology and absorption technology can be used to recover the organic solvent, and the waste gas can be discharged up to the standard when it has recycling value; When it is not suitable for recycling, adsorption concentration combustion technology, new biological technology with environmental advantages, absorption technology, plasma technology or advanced ultraviolet oxidation technology can be used for purification and discharge.

(5) Waste gas containing organic halogen component VOCs should be treated by non-incineration technology.

(6) Odor gas pollution sources can be purified by using new biological technology, plasma technology, adsorption technology, absorption technology, advanced ultraviolet oxidation technology or combined technology with environmental advantages. The purified malodorous gas should not only meet the discharge standard, but also be discharged at high altitude to avoid disturbing people.

(7) Promote the use of fume extraction and exhaust devices with oil mist recovery function in catering service industry, and adopt efficient fume and VOCs purification devices according to scale, site and climate conditions, and then discharge them up to standard.

(8) Strictly control the secondary pollution generated in the process of VOCs treatment. Inorganic waste gas containing sulfur, nitrogen and chlorine generated in the process of catalytic combustion and thermal incineration, and organic waste water generated in the process of adsorption, absorption, condensation and biological treatment should be treated and discharged up to standard.

(9) Non-renewable filtration materials, adsorbents, catalysts and other purification materials should be treated and disposed of in accordance with the relevant provisions of the national solid waste management.