Deoxygenating Enzyme

Features and Advantages

• Rapid removal of hydrogen peroxide
• Substantially reduces treatment costs
• Wide range of applications: semiconductor, optoelectronics, paper, textile dyeing and printing industries.
• The formulation can be customised to the characteristics of the waste liquid
• Does not affect discharge compliance and produces no sludge
• No impact on the environment
• Metal ions such as Cu and Fe in waste liquid impair the activity of ordinary enzymes; the Hantai enzyme resists attack by metal ions

Reaction Mechanism of the Deoxygenating Enzyme

Comparison of Common Methods for Removing Hydrogen Peroxide

	Advantages	Disadvantages
Activated carbon	Strong hydrogen peroxide removal capability Can adsorb organic matter	Activated carbon breaks up easily with high loss Treatment system clogs easily
Ferrous sulfate addition (Fenton process)	Can simultaneously remove COD	Sludge must be disposed of pH adjustment required Hydrogen peroxide concentration before treatment must not be too high
Sodium thiosulfate	No sludge produced	High dosing cost and large dose required Hydrogen peroxide residue is likely Conductivity increases substantially
Deoxygenating Enzyme	Low investment cost No modification of existing equipment required Removes 90% of hydrogen peroxide effectively within a 10-minute reaction No sludge produced Does not affect COD, ammonia nitrogen and similar values Can treat high-concentration hydrogen peroxide	Dosing cost roughly equal to the Fenton process Poor thermal stability; operating above 45°C requires a higher dose