Process and equipment for treating wastewater by ozone and activated carbon

Abstract

The invention discloses a process and equipment for treating wastewater by ozone and activated carbon. The equipment comprises a flocculation system, a pre-ozone contact treatment system, a precipitation system, a main ozone contact treatment system and a biological activated carbon adsorption system which are arranged in sequence; according to the flocculation system disclosed by the invention, ahigh-frequency oscillation dispersion medicine feeding mode is realized through the matching of a feeding mechanism and a vibration dispersion mechanism, so that the flocculation reaction of wastewater is uniform and sufficient, and the phenomena of only local reaction and secondary pollution are avoided; through precipitation after pre-ozone contact treatment, the precipitation impurity removaleffect can be improved, the precipitation duration time is effectively shortened, the overall working efficiency is improved, and the effect of adsorbing and removing harmful substances can be effectively improved through two times of ozone sterilization treatment. Ozone treatment and activated carbon adsorption treatment are combined together, so that secondary derivatives generated in the treatment process can be effectively absorbed and treated, and the wastewater treatment effect is greatly improved.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment equipment, in particular to a process and equipment for treating wastewater with ozone activated carbon. Background technique [0002] With the rapid development of the national economy and the improvement of people's living standards, people's demand for the use of various resources has also risen sharply. Among them, the use and reprocessing of water resources has become an important issue. For example, the waste water that has been used by people will become raw water after preliminary screening, but the raw water still contains a large amount of heavy metals, organic molecules, oxidized and decomposed chelates, bacteria and viruses, impurities of a certain particle size or Sediment, etc., which requires the treatment of raw water (ie waste water) before it can be reused, such as for spray irrigation, mobile dust removal or landscaping and greening. The ozone-biological activated ...

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Problems solved by technology

[0003] However, at present, most of the equipment for ozone activated carbon treatment of wastewater has the following problems: (1) Most of the flocculant dosing process only adopts a simple single-point feeding method, and the flocculant cannot be uniformly dispersed after being added to the wastewater , it is easy to cause localized reactions. On the one hand, additional stirring devices are even required and the optimization effect cannot be guaranteed. On the other hand, the amount of flocculant needs to be continuously increased, and secondary pollution may even occur; (2) the current equipment Most of them only use static sedimentation after completing the flocculation operation. However, on the one hand, the time-consuming process of static sedimentation leads to the inability to improve the efficiency of the overall process monomer working hours. On the other hand, static sedimentation is easy to remove impurities due to layer boundaries (3) Most of the existing equipment adopts the method of air-in-water for ozone contact reaction treatment, which easily leads to excessive ozone consumption on the one hand, and on the other hand, most of the contact reactions using this method only A single ozone sterilization treatment can be carried out, which makes the ozone sterilization effect poor; (4) most of the current equipment completely separates the ozone treatment and the activated carbon adsorption treatment, on the one hand, it is easy to cause the process to be broken, so that the secondary derivatives produced during the treatment process The substances cannot be absorbed and treated, resulting in low water treatment effect. On the other hand, a single activated carbon adsorption in a certain process will easily cause the consumption rate of activated carbon consumables to be too fast

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