System for wastewater advanced treatment

Abstract

The invention belongs to the technical field of wastewater treatment, and particularly relates to a system for wastewater advanced treatment. The system comprises a regulating tank, a flocculation sedimentation tank, a biochemical reaction tank, a sedimentation tank and an advanced treatment reactor which are connected in sequence, wherein the upper part of the sedimentation tank is connected witha liquid inlet pipeline of the advanced treatment reactor, the interior of a cylinder of the advanced treatment reactor is divided into a heterogeneous Fenton synergistic ozone reaction zone and a biological aeration filtration tank zone, the liquid inlet pipeline is arranged at the lower part of the cylinder and communicates with the heterogeneous Fenton synergistic ozone reaction zone, a heterogeneous Fenton catalyst is introduced to make hydrogen peroxide can be reacted under the neutral condition to generate hydroxyl radicals to degrade organic matters in the wastewater, and the requirement of the pH adjustment to the acidic condition required by a Fenton oxidation system is avoided. At the same time, no iron mud is generated in the whole reaction, no secondary pollution is generated,the air source after the ozone oxidation is fully utilized, the aeration electricity consumption cost is reduced while ensuring the effect of the biological filtration tank, and the outlet water reaches the standard and is directly discharged.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a system for advanced treatment of wastewater. Background technique [0002] For a long time, the treatment of refractory organic wastewater has not been effectively treated due to a series of problems such as difficult to degrade, long-lasting hazards, and difficult treatment. The large discharge of pollutants seriously pollutes the environment and threatens human health. At present, there are three main types of treatment methods for refractory organic wastewater, namely: biological method, physical method and chemical oxidation method. [0003] Due to the low cost of biological treatment and convenient operation and management, it is widely used in various wastewater treatment. However, with the increasingly stringent national pollutant discharge standards, the biological treatment technology used by most enterprises cannot meet the latest industry wa...

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Problems solved by technology

[0006] Fenton technology is an advanced oxidation technology that has received more attention in recent years and is widely used in organic wastewater treatment: Fe 2+ Catalytic H 2 o 2 Generate ˙OH with extremely high oxidation ability, ˙OH further oxidizes organic matter, but Fenton technology needs to adjust the pH value, add ferrous sulfate to generate sludge, and need to build a sedimentation flocculation tank and add flocculant to remove iron sludge. The operation procedure is complicated. high operating costs

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