Hydrogen peroxide decomposition
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Is it dangerous to mix 5% hydrogen peroxide, 0.3% liquid alkali, and 94.7% wastewater in a pipeline mixer? If not handled properly, could direct contact between liquid caustic and hydrogen peroxide cause it to decompose immediately, generating gas and posing a danger?
If the medium is pure water and the temperature is not high, this mixture poses no safety risks. But it’s hard to say the same for wastewater; its components may either not affect the stability of hydrogen peroxide, or they may increase its stability, or they may reduce it. Moreover, such wastewater might contain flammable and explosive substances, and the release of oxygen when hydrogen peroxide decomposes represents a serious safety hazard.
Treat wastewater with hydrogen peroxide? Hydrogen peroxide decomposes when it comes into contact with metal ions; trivalent iron is a common example, but other metals can also cause this reaction. By controlling the feed properly, there are usually no problems. Storage of hydrogen peroxide can present issues; in some previous companies, the storage tanks rusted and led to explosions. . .
The amount of hydrogen peroxide you’re using is low, so the alkaline decomposition produces not much gas or heat, which prevents the material from flowing. . There shouldn’t be too many problems, right? If you’re still worried, you can give it a try
First, treat hydrogen peroxide separately by adding a reducing agent or an oxidizing agent, depending on its pH value; after that, carry out further treatment
Hydrogen peroxide decomposes to produce gas under alkaline conditions, but you also need to consider what the COD of your wastewater is