CN104045206A - UV/O3+BAF combined advanced oxidation sewage treatment equipment - Google Patents

Abstract

The invention discloses a UV (ultraviolet)/O3+BAF (biological aerated filter) advanced oxidation sewage treatment facility which comprises a UV/O3 catalytic reaction region, a supporting layer and haydite filter material layer region and a water outlet region, wherein the supporting layer and haydite filter material layer region is provided with a BAF. By combining the UV catalytic O3 oxidation and microbial degradation technique, the facility lowers the sewage treatment cost and enhances the COD (chemical oxygen demand) removal rate.

Description

UV/O3+BAF combined advanced oxidation sewage treatment equipment

technical field

The invention relates to a sewage treatment device, in particular to a UV/O ₃ +BAF combined advanced oxidation sewage treatment equipment.

Background technique

The biological aerated filter is a sewage treatment process that combines the contact oxidation process and the suspended solids filtration process. The process principle is to fill the filter with a certain amount of granular filter material with a small particle size, and a biofilm grows on the surface of the filter material. , the inside of the filter is aerated, and when the sewage flows through, due to the high concentration of biofilm attached to the filter material, its strong oxidative degradation ability is used to quickly degrade the pollutants in the wastewater. The biological flocculation of the membrane intercepts a large amount of suspended solids in the sewage, and ensures that the detached biofilm will not float out with the water, thereby achieving the purpose of purifying the wastewater. However, limited by the degradation ability of microorganisms, biological aerated filters cannot treat wastewater containing a large amount of refractory organic matter. Its main disadvantages are: (1) The biological aerated filter has high requirements on the SS of the influent, and needs to adopt a pretreatment process with a high treatment effect on S. Moreover, the concentration of the incoming water should not be too high, otherwise it will easily cause the filter material to agglomerate and block. (2) It cannot handle high-concentration refractory organic wastewater. In general, the influent COD cannot exceed 2000mg/L, which limits the scope of its sewage treatment.

Contents of the invention

The purpose of the present invention is to provide a UV/O ₃ +BAF combined advanced oxidation sewage treatment equipment, which can treat refractory biodegradable organic wastewater with high efficiency and low cost.

The present invention is achieved in this way. A UV/O ₃ +BAF combined advanced oxidation sewage treatment equipment includes a UV/O ₃ catalytic reaction zone, a supporting layer, a ceramsite filter material layer zone, and a water outlet zone, wherein the UV/O 3 The O ₃ catalytic reaction area contains a gas-liquid mixing pump, an ozone generator, and an ultraviolet lamp. The supporting layer and the ceramsite filter material layer area include a supporting layer, an aeration tube, a filler, and a filter head. It is characterized in that the UV/O ₃ The bottom of the catalytic reaction zone is connected to the water inlet pipe, and before the water inlet pipe is connected to the gas-liquid mixing pump, the gas-liquid mixing pump is connected to the ozone generator; the upper part of the UV/O ₃ catalytic reaction zone is equipped with a backwash water inlet pipe and a backwash intake pipe The support layer and the filter head are installed at the bottom of the support layer and the ceramsite filter material layer area, and the filter head is arranged on the support layer; the aeration pipe is installed in the middle of the support layer and the ceramsite filter material layer area; The upper part of the ceramsite filter material layer area is a filler layer for the growth of microorganisms; the water outlet area is an overflow device, and the bottom is connected with a normal outlet pipe and a backwash outlet pipe.

Further, the outlet water level of the backwash outlet pipe is lower than the normal outlet pipe.

The advantages of the present invention are: (1) good ultraviolet catalysis effect, good O ₃ oxidation ability, remarkable UV/O ₃ synergistic effect, reduced sewage treatment cost, and high COD removal rate; (2) UV/O ₃ technology Excess O ₃ remaining in the gas can float up and be used by microorganisms, the cost of tail gas treatment is low, and there is no secondary pollution. (3) The combination of UV/O ₃ technology and mature BAF technology has high processing efficiency, is economical and practical, and is popular; (4) During the operation of the equipment, various key indicators are monitored in real time to ensure the processing effect and safety.

Description of drawings

Figure 1 is a schematic structural view of the present invention.

In the figure, 1. Gas-liquid mixing pump 2. Ozone generator 3. Backwash water inlet pipe 4. Supporting layer 5. Aeration pipe 6. Packing layer 7. Shell 8. Normal outlet pipe 9. Backwash outlet pipe 10 .Filter head 11.Backwash intake pipe 12.UV lamp.

Detailed ways

As shown in Figure 1, a UV/O ₃ +BAF combined advanced oxidation sewage treatment equipment includes a shell 7, and the shell 7 is divided into a UV/O ₃ catalytic reaction zone, a supporting layer and a ceramsite filter material layer zone , water outlet area, wherein UV/O ₃ catalytic reaction zone is provided with ultraviolet lamp 12, the bottom of UV/O ₃ catalytic reaction zone is connected with water inlet pipe, before the water inlet pipe is connected with gas-liquid mixing pump 1, gas-liquid mixing pump 1 and ozone The generator 2 is connected; a backwash water inlet pipe 3 and a backwash inlet pipe 11 are installed on the upper part of the UV/O ₃ catalytic reaction zone; a support layer 4 and a filter head 10 are installed on the bottom of the support layer and the ceramsite filter layer area, A filter head 10 is arranged on the support layer 4; an aeration pipe 5 is installed in the middle of the support layer and the ceramsite filter material layer area; the upper part of the support layer and the ceramsite filter material layer area is a filler layer 6 for the growth of microorganisms; the water outlet area It is an overflow device, and the bottom is connected with a normal outlet pipe 8 and a backwash outlet pipe 9. The outlet water level of the backwash outlet pipe 9 is lower than the normal outlet pipe 8 .

The sewage inlet pipe and the ozone generator 2 are connected to the gas-liquid mixing pump 1, and the appropriate ratio of ozone and sewage is adjusted according to the concentration of pollutants. The sewage and ozone pumped into the catalytic reaction tank are catalyzed by ultraviolet light 12 A reaction occurs, and high concentrations of refractory biodegradable organics are degraded into readily biodegradable organics.

Sewage containing easily degradable organic matter passes through the filter head 10 in the supporting layer 4 (one function of the supporting layer 4 is to support and fix the filter head 10, and the other function is to block ultraviolet rays from entering the biological aerated filter tank) and enter the biological aerated filter tank , the biological aerated filter mainly includes a packing layer 6 and an aeration tube 5, microorganisms adhere to the packing layer 6 and grow, and the aeration tube 5 is fed with fresh air. Under the action of microorganisms, the easily biodegradable organic matter is completely decomposed, thereby Get clean water that meets discharge standards.

A small amount of unreacted ozone in the catalytic reaction tank floats up into the biological aerated filter, where it undergoes a redox reaction to generate oxygen, which supplies the growth and reproduction of microorganisms, reduces the pollution of the environment caused by ozone discharge, and is also conducive to the renewal of microorganisms.

The backwash water inlet pipe 3 and the backwash air inlet pipe 11 are opened regularly to purify the biological aerated filter, to remove blocking substances such as sludge on the filter head and to wash away dead microorganisms.

Claims (1)

1. A UV/O ₃ +BAF combined advanced oxidation sewage treatment equipment, including UV/O ₃ catalytic reaction zone, support layer and ceramsite filter material layer zone, water outlet zone, characterized by UV/O ₃ catalytic reaction There is an ultraviolet lamp tube in the area, and a water inlet pipe is connected to the bottom of the UV/O ₃ catalytic reaction area, and a gas-liquid mixing pump is connected before the water inlet pipe, and the gas-liquid mixing pump is connected to the ozone generator _; A backwash water inlet pipe and a backwash inlet pipe; the support layer and the filter head are installed at the bottom of the support layer and the ceramsite filter material layer area, and the filter head is arranged on the support layer; the middle part of the support layer and the ceramsite filter material layer area An aeration pipe is installed; the support layer and the upper part of the ceramsite filter material layer area are the filler layer for the growth of microorganisms; the water outlet area is an overflow device, and the bottom is connected with a normal outlet pipe and a backwash outlet pipe.