Light catalytic treatment reactor for organic waste water

Abstract

A technological scheme of treating organic waste water including pre-treatment, photocatalytic treatment and post-treatment, and during the photocatalytic treatment, a powerful reaction system is used and consists of TiO2 or modified TiO2 as catalyst, active carbon fiber net as catalyst carrier, and H2O2, O3 and two-valent ferrous salt as auxiliary oxidants and can result in multiple oxidation process including photocatalytic oxidation, photochemical oxidation, ferriin reagent oxidation, etc. The present invention also provides the specific design of a practical industrial photocatalytic reactor. The present invention is suitable for the effective degradation of organic matter in high-concentration difficult-to-degrade organic waste water.

Description

technical field [0001] The invention relates to a degradation treatment process for organic waste water and a treatment device thereof. Background technique [0002] In the organic wastewater produced by industries such as synthetic chemistry, polycyclic aromatic hydrocarbons (PAH) compounds, heterocyclic compounds, organic cyanides, synthetic detergents, polychlorinated biphenyls, synthetic pesticides, synthetic dyes, etc. are difficult to degrade and are toxic. Organic waste, this type of substance has a stable structure, and direct discharge is extremely harmful. At present, the treatment technologies for refractory organic wastewater mainly include adsorption method, membrane separation method, extraction method, photochemical method, ozone oxidation method, phenanthroline (Fenton) reagent method, biochar method, etc. The purpose of adsorption method, membrane separation method and extraction method is to separate the refractory organic substances, which will cause seco...

AI Technical Summary

Problems solved by technology

The purpose of adsorption method, membrane separation method, extraction method, etc. is to separate the refractory organic substances, which will cause secondary pollution

UV / H 2 o 2 with UV / O 3 It is difficult to effectively destroy the structure of substances with very stable structures such as PCBs, such as photochemical methods, ozone oxidation methods, and phenanthroline reagent methods, and the treatment efficiency is not high, and a large amount of H is consumed. 2 o 2 and other chemical reagents, high operating costs

UV / H as disclosed in WO93 / 11073 2 o 2 process to treat polluted groundwater and waste water, the H 2 o 2 The concentration far exceeds the concentration of organic matter, which is not feasible for the treatment of high-concentration organic wastewater, and the H in the effluent after treatment 2 o 2 Need to use Na 2 SO 3 Neutralization, high operating costs

The biochar method is only suitable for the treatment of slightly polluted wastewater, and the regeneration of activated carbon is difficult

The wet catalytic oxidation technology developed in recent years oxidizes and decomposes organic matter through high temperature and high pressure, and the effect is good, but this technology requires high equipment and high operating costs, which limits its application

CN1040773A and CN1050532A disclose a technology for treating phenol-containing wastewater or phenolic wastewater with photocatalysis. Since the catalyst used is in a suspension state, it is inconvenient to recycle, and the amount of water to be treated is small, so it is difficult to industrialize

The disclosed photocatalytic water purification processor of CN2232035Y and CN2280090Y, its simple photocatalytic reaction can only be processed to slightly polluted water (tap water), and adopts glass fiber as carrier fixed photocatalyst TiO to make photocatalyst film, easily blocks light, The photocatalyst is not firmly fixed, and the photocatalytic treatment ability is weak, so it is powerless to treat organic wastewater with high concentration and complex composition

Images