CN210825843U

CN210825843U - Wastewater treatment system

Info

Publication number: CN210825843U
Application number: CN201921320448.6U
Authority: CN
Inventors: 张巧; 许德超; 杨晟; 彭盛华
Original assignee: SHENZHEN ACADEMY OF ENVIRONMENTAL SCIENCES
Current assignee: SHENZHEN ACADEMY OF ENVIRONMENTAL SCIENCES
Priority date: 2019-08-14
Filing date: 2019-08-14
Publication date: 2020-06-23
Anticipated expiration: 2029-08-14

Abstract

The utility model discloses a can high-efficient waste water treatment system who handles TFT-LCD organic waste water, this waste water treatment system includes: the ozone reaction chamber is used for enabling the wastewater to be in contact reaction with ozone; the anaerobic chamber is used for receiving the wastewater treated by the ozone reaction chamber and carrying out anaerobic treatment; the aerobic chamber is used for receiving the wastewater after the anaerobic treatment and carrying out aerobic treatment; and the sedimentation tank is used for receiving the wastewater after the aerobic treatment and carrying out phase separation. An ozone reaction chamber is additionally arranged before anaerobic treatment and aerobic treatment, and the step of ozone oxidation pretreatment is adopted, so that the biodegradability of the wastewater is improved, organic pollutants difficult to degrade in TFT-LCD organic wastewater, especially pollutants with characteristics of difficult degradation in liquid crystal panel organic wastewater such as TMAH, DMSO and the like, are removed through oxidation, the subsequent anaerobic treatment and aerobic treatment are facilitated, the improvement of the wastewater degradation efficiency is promoted, the hydraulic retention time is shortened, the wastewater treatment speed is accelerated, and the effluent quality is improved.

Description

Wastewater treatment system

Technical Field

The utility model relates to a sewage treatment technical field especially relates to a wastewater treatment system.

Background

Thin film transistor liquid crystal displays (TFT-LCDs) are currently the dominant technology for flat panel displays. In the manufacturing process of the TFT-LCD, various complex production and processing processes are involved, the amount of generated wastewater is large, and the pollutant components in the wastewater are complex. Wherein, the organic wastewater accounts for more than one third of the total wastewater, contains high-strength organic nitrogen and organic sulfur substances, mainly dimethyl sulfoxide (DMSO), ethanolamine (MEA), tetramethylammonium hydroxide (TMAH) and the like. The wastewater is a typical representative of high-Nitrogen industrial wastewater, the ratio of TN (Total Nitrogen) to COD (Chemical Oxygen Demand) is about 0.17-0.2, which is 3-4 times higher than that of conventional activated sludge, and if the wastewater is not properly treated, the wastewater is discharged to cause serious water body pollution.

The main pollutants contained in the TFT-LCD organic wastewater generally have toxic action on microorganisms or can inhibit the biological activity of the microorganisms. If a general biological denitrification process is adopted for treatment, poor sludge sedimentation performance is easily caused, or nitrification and denitrification inhibition are caused due to too high ammonia nitrogen concentration, so that nitrogen substances cannot be effectively removed. Research shows that peripheral electrons of organic carbon of pollutants such as TMAH, DMSO and the like are not easily oxidized by chemical oxidants such as potassium dichromate. If traditional activated sludge is adopted, longer HRT (Hydraulic Retention Time) and higher dissolved oxygen are needed to degrade, and when further nitrification and denitrification are needed, ammonia nitrogen and totally undecomposed organic matters exist in a nitrification system at the same Time, so that the inhibition phenomenon of the autotrophic microorganisms is caused, and the degradation efficiency is seriously influenced. Therefore, the general activated sludge method is difficult to treat the TFT-LCD organic wastewater, and the treatment efficiency is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of how to provide a waste water treatment system that can high-efficient handling TFT-LCD organic waste water.

According to the utility model discloses a first aspect, the utility model provides a wastewater treatment system, according to the utility model discloses an embodiment, this wastewater treatment system includes:

the ozone reaction chamber is used for enabling the wastewater to be in contact reaction with ozone;

the anaerobic chamber is used for receiving the wastewater treated by the ozone reaction chamber and carrying out anaerobic treatment;

the aerobic chamber is used for receiving the wastewater after the anaerobic treatment and carrying out aerobic treatment;

and the sedimentation tank is used for receiving the wastewater after the aerobic treatment and carrying out phase separation.

The utility model has the advantages that:

an ozone reaction chamber is additionally arranged before anaerobic treatment and aerobic treatment, and the step of ozone oxidation pretreatment is adopted, so that the biodegradability of the wastewater is improved, organic pollutants difficult to degrade in TFT-LCD organic wastewater, in particular the pollutants with characteristics of difficult degradation in liquid crystal panel organic wastewater such as TMAH, DMSO and the like, are removed through oxidation, the subsequent anaerobic treatment and aerobic treatment are facilitated, the toxic action on microorganisms in the subsequent biological treatment process is avoided or the biological activity of the microorganisms is inhibited, the improvement of the wastewater degradation efficiency is promoted, the hydraulic retention time is reduced, the wastewater treatment speed is accelerated, and the effluent quality is improved.

Particularly, the anaerobic chamber, the aerobic chamber and the sedimentation tank can be integrated into an integrated three-dimensional ecological reaction system, and the system has the advantages of small floor area, economic operation, convenient management and the like.

According to the embodiment of the utility model, the vertical curtain type biological composite packing layer is arranged in the anaerobic chamber and/or the aerobic chamber.

The facade curtain type biological composite filler layer adopts novel biological filler with a special facade curtain type structure, the filler forms a net-shaped matrix structure by polypropylene ropes, and a large amount of filament-shaped synthetic chemical fiber materials are distributed on the net-shaped ropes. The specific surface area of the filler is 2000-3500 m²·m^-3The filler is far larger than the soft fibrous filler, the elastic three-dimensional filler and the combined filler which are applied in the current industry, can provide sufficient attachment surface and internal space for microorganisms, and enables the biomass in the reactor to be 2-4 times higher than that in the conventional process.

According to the embodiment of the utility model, the top of anaerobic room and/or good oxygen room still is equipped with ecological foundation bed, and ecological foundation bed includes filter screen layer and filter bed, and the filter bed is located the filter screen layer top.

According to the embodiment of the utility model, still be equipped with aquatic plant layer on the precoat, by planting the aquatic plant between them, especially emergent aquatic plant forms.

The biological film growing on the plant root system and the biological filler and the microorganism suspending in the anaerobic chamber and/or the aerobic chamber are fixed in the anaerobic chamber and/or the aerobic chamber, and under the condition of reasonable aeration, the organic matters in the sewage are oxidized and decomposed and converted into stable inorganic matters, so that the organic pollutants in the sewage are degraded and removed. The three-dimensional ecological treatment system is a three-dimensional ecological treatment technology which has the advantages of beautiful landscape, good effluent quality, low operation cost, high treatment efficiency, sludge source reduction, carbon dioxide emission reduction, aesthetic value and the purpose of realizing water resource recycling. The difference from other traditional full-fixed biofilm reactors is that an ecological system suitable for growth and propagation of microorganisms can be constructed by planting aquatic plants, particularly emergent aquatic plants, in a filter material layer of an ecological base bed, partial organic matters can be removed by using plant growth, and an auxiliary biological carrier can be constructed by using plant root systems, so that the aims of reducing the residual sludge amount, purifying the odor generated in the sewage treatment process and improving the microclimate and landscape environment of biochemical units are fulfilled.

According to the embodiment of the utility model, the filter material layer is the haydite layer.

According to the embodiment of the utility model, the particle size of the ceramsite in the ceramsite layer is 16 mm-22 mm.

According to the utility model discloses an embodiment, the air inlet of ozone reaction chamber is equipped with flowmeter and first flow control valve, the gas vent of ozone reaction chamber is equipped with the second flow control valve, and the ozone that ozone generator produced lets in the reaction of ozone reaction chamber by the air inlet, and the remaining ozone of reaction is discharged from the gas vent.

When the direction of the first flow control valve to the ozone reaction chamber is in a closed state, the concentration of the ozone generated by the reaction can be directly measured, and the reaction condition of the ozone reaction chamber can be monitored at any time.

According to the utility model discloses an embodiment, ozone reaction chamber still is equipped with the pH monitor that is used for detecting waste water pH.

The pH monitor can monitor the pH change condition in the ozone reaction chamber in time, and adjust the proportion of ozone and wastewater in time to improve the treatment efficiency.

According to the utility model discloses an embodiment, the sedimentation tank is the pipe chute sedimentation tank, and the pipe chute sedimentation tank is equipped with pipe chute and mud groove by last to down in proper order.

The inclined tube sedimentation tank has the advantages of easy construction, high hydraulic load, high sedimentation efficiency, short retention time, small occupied area and the like in the actual use process.

According to the utility model discloses an embodiment still includes and is used for carrying out the inorganic equalizing basin of preliminary treatment to waste water.

The water quantity and the water quality of the wastewater to be treated are regulated and homogenized by an inorganic regulating tank so as to reduce the impact load of the incoming water.

Drawings

Fig. 1 is a schematic view of a wastewater treatment system according to an embodiment of the present invention.

Detailed Description

The conception, specific structure, and technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features, and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.

Example 1

Fig. 1 is a schematic view of a wastewater treatment system according to an embodiment of the present invention. As shown in fig. 1, the arrow portion on the upper left indicates the flow direction of ozone, and the remaining portion indicates the flow direction of wastewater. The wastewater treatment system comprises an inorganic adjusting tank 1, an ozone reaction chamber 2, an anaerobic chamber 3, an aerobic chamber 4 and a sedimentation tank 5 which are arranged in sequence. The factory waste water of the liquid crystal panel factory firstly enters the inorganic adjusting tank 1 to adjust the water quantity and homogenize the water quality so as to reduce the impact load of the incoming water. The effluent of the inorganic regulating reservoir enters the ozone reaction chamber 2 through a first lift pump 11. The oxygen generator 21 generates oxygen and then ozone into the ozone generator 22, the generated ozone is regulated by a flow meter 23, and a first flow control valve 241 is further provided in a pipeline of the flow meter 23 leading to the ozone reaction chamber 2. Ozone is introduced through the air inlet and enters the air dispersion plate 26, and the ozone and the wastewater to be treated are fully mixed through the stirring of the stirrer 27. A pH detector 28 is further disposed in the ozone reaction chamber 2 to monitor the pH change of the wastewater in the ozone reaction chamber 2 in real time, and the residual ozone is discharged from the exhaust port through the second flow control valve 242 during the reaction process.

The wastewater treated by the ozone reaction chamber 2 sequentially enters the anaerobic chamber 3 and the aerobic chamber 4 through the peristaltic pump 25 for anaerobic treatment and aerobic treatment to remove pollutants such as organic matters, nitrogen, phosphorus and the like, and then enters the sedimentation tank 5. The inside of anaerobic chamber 3 and aerobic chamber 4 is equipped with facade curtain formula biological composite packing layer 6, and the section of this facade curtain formula biological composite packing layer 6 is tubular or circular, the rhombus structure, has guaranteed the equipartition of biomembrane in the reaction chamber, and rivers can form special flow state after getting into facade curtain formula biological composite packing layer 6, promote pollutant and the filler contact each other in the waste water, provide sufficient attached surface and inner space for the microorganism, are favorable to getting rid of the pollutant, reduce mud output by a wide margin. The bottom of the anaerobic chamber 3 is provided with a submersible stirrer 31 which can fully stir the wastewater and improve the contact efficiency of the wastewater and the filler, thereby improving the reaction efficiency. The bottom of the aerobic chamber 4 is provided with a micropore aeration pipe 41, and the outlet water of the anaerobic chamber 3 and the sludge are fully subjected to biological contact oxidation reaction through aeration by the micropore aeration pipe 41. An ecological bed 7 is arranged on the upper surfaces of the anaerobic chamber 3 and the aerobic chamber 4. The bottom of the ecological base bed 7 is provided with a support (not shown in the figure), the support is provided with a filter screen layer (not shown in the figure) formed by spreading a filter screen, the filter screen layer is also filled with a filter material layer 71 with the height of about 10cm, and the filter material layer 71 is a ceramic particle layer which is made of ceramic particles with the diameter of 16-22 mm. Aquatic emergent aquatic plants 72 such as canna, iris, spider orchid and the like are planted on the ecological base bed 7. The emergent aquatic plant 72 has developed root system, which is favorable for hanging membrane on the vertical curtain type biological composite filler layer 6, further purifying water body, beautifying landscape and reducing odor.

After sufficient reaction in the anaerobic chamber 3 and the aerobic chamber 4, the wastewater mixed liquid is precipitated by a precipitation tank 5. The sedimentation tank 5 in this embodiment is an inclined tube sedimentation tank, and includes an inclined tube 51 and a sludge discharge tank 52 located below the inclined tube 51. The wastewater mixed liquor enters the inclined tube sedimentation tank and then enters the inclined tube 51 to move, the wastewater is separated from sludge which is easy to settle, wherein the clarified wastewater is discharged from the upper part of the inclined tube 51, and the settled sludge enters the sludge discharge tank 52 through the sludge collecting hopper 521 and is discharged through the sludge pump 53.

Example 2

A wastewater treatment system, which is different from the system of example 1 in that the sedimentation tank is a horizontal flow type sedimentation tank.

Example 3

A wastewater treatment system, which is different from the embodiment 1 in that an elastic three-dimensional packing layer is adopted in an anaerobic chamber and an aerobic chamber.

Example 4

A wastewater treatment system was distinguished from example 1 in that no ecological bed was provided.

Example 5

A wastewater treatment system differing from example 1 in that the filter material layer is a gravel layer.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the foregoing and various other changes, omissions and deviations in the form and detail thereof may be made without departing from the scope of this invention.

Claims

1. A wastewater treatment system, comprising:

2. The wastewater treatment system of claim 1, wherein the anaerobic chamber and/or the aerobic chamber is provided with a vertical curtain type biological composite filler layer.

3. The wastewater treatment system of claim 2, wherein an ecological bed is further disposed above the anaerobic chamber and/or the aerobic chamber, the ecological bed comprising a filter screen layer and a filter material layer, the filter material layer being disposed above the filter screen layer.

4. The wastewater treatment system of claim 3, wherein an aquatic plant layer is further disposed on the filter bed.

5. The wastewater treatment system of claim 3, wherein the filter layer is a ceramic layer.

6. The wastewater treatment system according to claim 5, wherein the ceramsite in the ceramsite layer has a particle size of 16mm to 22 mm.

7. The wastewater treatment system of claim 1, wherein the inlet of the ozone reaction chamber is provided with a flow meter and a first flow control valve, the outlet of the ozone reaction chamber is provided with a second flow control valve, ozone generated by the ozone generator is introduced into the ozone reaction chamber through the inlet to react, and residual ozone after reaction is discharged from the outlet.

8. The wastewater treatment system of claim 1, wherein the ozone reaction chamber is further provided with a pH monitor for detecting the pH of the wastewater.

9. The wastewater treatment system according to claim 1, wherein the sedimentation tank is a tube-chute sedimentation tank, and the tube-chute sedimentation tank is provided with a tube chute and a sludge discharge groove in sequence from top to bottom.

10. The wastewater treatment system according to any one of claims 1 to 9, further comprising an inorganic conditioning tank for pretreating the wastewater.