Nitrogen released from fuel combustion process reacts with oxygen and forms Nitric Oxide (NO). The Nitric Oxide is a colorless gas and it will be oxidized into Nitrogen dioxide (NO2) upon reacting with oxygen. This NO2 has odorous and acidic in nature, causes hazardous to human health and the environment, even in typically low concentrations.

https://www.apzem.in

Phosphating is the widely used pretreatment process for metal surfaces and polishing of ferrous and non ferrous materials. It plays an important role in automobile and appliances industries because of its corrosion resistance, wear resistance and speed of operation. Phosphate coating is typically used to coat any steel parts to prevent from corrosion and can be used for pre treatment of any material or equipment before doing painting or coating. Chemicals used for phosphate coatings are Manganese, Iron and Zinc.

Caustic scrubbing technology is used for removal of acidic pollutants in exhaust gas from different industries.A cylindrical column consist of packing materials and spray nozzles in which the contaminated gas is passed. Pollutants from the gas dissolve in the liquid based on the absorption technology. Spray nozzles are arranged in such a way that spray zones should cover cross sectional area of column. There is packing material in the tower to enhance contact between liquid and gas.

;