Bismuth carbonate composite TiO2/PP suspension cascade biofilm reactor

Abstract

The invention relates to a bismuth carbonate composite TiO2 / PP suspension cascade biofilm reactor, belonging to the technical field of environmental protection. The forbidden band width and the average ionization energy of the nanometer titanium dioxide electron transition are reduced by doping heavy metal ions, so that nanometer titanium dioxide absorbs light energy more easily under the action of photocatalysis to be subjected to electron transition to generate electron hole pairs, the electron hole pairs have extremely strong electron acquisition ability and enable dissolved oxygen adsorbedon the surfaces of nanometer titanium dioxide particles to capture electrons to form superoxide anions, hydroxide ions and water adsorbed on the surface of suspended composite filler can be oxidizedto form hydroxyl radicals, and the superoxide anions and the hydroxyl radicals can oxidize most of organic matters to obtain final products CO2 and H2O. The reactor combines the advantages of biofilmand photocatalytic treatment of micro-polluted water bodies, and is set to work with a cascade process, which shortens the process flow, improves a catalytic degradation effect and lowers the cost, thereby having broad application prospects.

Description

technical field [0001] The invention relates to a bismuth carbonate composite TiO2 / PP suspended cascade biofilm reactor, which belongs to the technical field of environmental protection. Background technique [0002] Slightly polluted water sources generally refer to the sewage generated in handicraft industry, agriculture and daily life without reasonable treatment, and are directly discharged into water supply sources. The polluted water sources mainly contain trace amounts of organic matter, ammonia nitrogen, pesticides and other harmful substances. Conventional water treatment methods It is difficult to dispose of them efficiently. [0003] With the development of my country's economy and the rapid process of industrialization, many rivers are polluted at different levels, and the seriously polluted rivers have lost their original self-repair ability. In the case of serious shortage of water resources in our country, slightly polluted raw water is still used as Harmful s...

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Aiming at the existing photocatalysis-biological combination method that can remove organic matter in micro-polluted water, but has the problems of long process flow, low catalytic effect and high cost, a bismuth carbonate composite TiO 2 / PP suspension cascade biofilm reactor

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