A breeding wastewater decoloring treatment device

Abstract

The application belongs to the technical field of sewage treatment equipment, and particularly relates to a breeding wastewater decoloring treatment equipment, which comprises a rough filtration device, a sludge pool and an anaerobic tank are connected to the rough filtration device, the anaerobic tank is communicated with an oxygen enrichment tank through a pipeline one and a reflux pipeline, the oxygen enrichment tank is connected with an inclined filter water collecting tank, the oxygen enrichment tank comprises an oxygen enrichment tank body with an open upper side, a liftable air supply device is arranged in the oxygen enrichment tank body, and the air supply device is connected with a plurality of gas collecting aeration heads arranged in the oxygen enrichment tank body. The depth of aeration is controlled by arranging the liftable air supply device on the oxygen enrichment tank, the exchange time of the gas and the water body is controlled without changing the air inlet amount, the oxygen content of the wastewater in the oxygen enrichment tank is controlled, the gas collecting aeration heads are arranged to realize aeration after gas collection to form a bubble ring, and the wastewater in the oxygen enrichment tank has good fluidity and is not prone to precipitation.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment equipment, and in particular relates to a decolorization treatment device for aquaculture wastewater. Background Art

[0002] Aquaculture is a vital food production sector worldwide, but its wastewater discharge has become a growing environmental problem. Aquaculture wastewater contains large amounts of organic matter, suspended solids, nitrogen compounds, and pigments, all of which negatively impact aquatic ecosystems and the surrounding environment. Pigment contamination in wastewater not only negatively impacts water quality but also hinders photosynthesis, affecting the survival and growth of aquatic organisms. Therefore, effective decolorization treatment is essential.

[0003] At present, there are many decolorization methods for treating aquaculture wastewater, including chemical precipitation, biological treatment, adsorption, redox, etc. For example, a large-scale pig farm aquaculture wastewater treatment system and method disclosed in the invention patent with patent announcement number CN107010788B mainly solves the problems of large footprint, low treatment efficiency and low degree of automation control in the existing technology. The large-scale pig farm aquaculture wastewater treatment system includes a pretreatment system, an anaerobic treatment system, an aerobic treatment system and a deep treatment system connected in sequence. The deep treatment system includes an MBR reaction tank, an electro-oxidation decolorization device and a clear water tank connected in sequence. However, this system has a problem shared by the existing technology. During the aerobic and anaerobic circulation process, the oxygen content of the aerobic system is not easy to control. Simply adjusting the air intake of the aeration system can easily cause an increase in precipitation in the aerobic and anaerobic systems, which requires regular cleaning. Therefore, there is a need for a decolorization treatment equipment for aquaculture wastewater that can easily adjust the oxygen content of the wastewater during the circulation process of the aerobic and anaerobic systems, while ensuring that precipitation is not easily accumulated during the circulation process. Summary of the Invention

[0004] In response to the above problems, the present invention proposes a decolorization treatment equipment for aquaculture wastewater, which effectively solves the problem in the prior art that the oxygen content of wastewater is difficult to control and that reducing the aeration amount easily produces precipitation and requires regular cleaning.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is as follows: a decolorization treatment equipment for aquaculture wastewater, comprising a coarse filtration device, the coarse filtration device is connected to a sludge tank and an anaerobic box, the anaerobic box is connected to an oxygen-enriched box through a pipe 1 and a return pipe, the oxygen-enriched box is connected to an inclined filtration water collecting box, the coarse filtration device comprises a filter box body, a filter screen is arranged in the filter box body, the filter screen divides the filter box body into a discharge area and a filter area, the discharge area is provided with a sewage inlet and a sewage outlet, the sewage outlet is connected to the sludge tank, the filter area is connected to the anaerobic box, the anaerobic box is a closed box body, a pressure relief valve is arranged on the anaerobic box, the oxygen-enriched box comprises an oxygen-enriched box body with an open upper side, a liftable air supply device is arranged in the oxygen-enriched box body, the air supply device is connected to a plurality of air collecting aeration heads located in the oxygen-enriched box body, and the air collecting aeration heads include The air filter is a kind of air filter that is installed in the air filter housing, and the air filter is a kind of air filter that is installed in the air filter housing.

[0006] By setting a liftable air supply device on the oxygen enrichment box, the aeration depth is controlled, and the exchange time between gas and water is controlled without changing the air intake volume to control the oxygen content of the wastewater in the oxygen enrichment box. The air is collected and aerated to form a bubble ring through the set air collecting aeration head, so that the wastewater in the oxygen enrichment box has better fluidity and is not prone to precipitation.

[0007] Furthermore, the air supply device includes a pipe bracket, and a lifting mechanism is provided on the outer wall of the oxygen-enriched box. The lifting mechanism is fixedly connected to the pipe bracket, and the air supply pipe is fixedly installed on the pipe bracket and connected to an air pump through a hose. The height of the lifting frame is controlled by the lifting mechanism, thereby controlling the depth of the air supply pipe inserted into the wastewater.

[0008] Furthermore, a plurality of colony plates are fixedly installed on the air supply pipe, and the colony plates make it easier for nitrifying bacteria to settle, thereby improving the nitrification effect.

[0009] Furthermore, the lower side of the sliding block is convex outward, so that the sliding block can slide downward after aeration without being affected by bubbles.

[0010] Furthermore, an outer shell is provided outside the air collecting aeration head, and the bottom of the air collecting rubber barrel is fixedly connected to the inner side surface of the bottom of the outer shell. A clamping ring is provided on the upper edge of the air collecting rubber barrel, and a limiting ring is provided on the inner side surface of the outer shell, and the inner diameter of the limiting ring is larger than the sliding block and smaller than the clamping ring. An aeration port is opened around the side of the outer shell. By means of the limiting ring provided in the outer shell, more stable air collection and aeration is achieved, and it is not easy to pull the material of the machine rubber barrel and cause aging.

[0011] Furthermore, the aeration port is opened downwardly and tilted from the inside to the outside. By controlling the angle of the aeration port, the air collecting aeration head can effectively spray and drive the sediment at the bottom of the box when it is located at the bottom of the oxygen enrichment box.

[0012] Furthermore, the shells are fixedly connected by support rods, and the provision of support rods reduces vibration of the air supply pipe during aeration, thereby improving the overall structural strength.

[0013] Furthermore, the cross-section of the filter is U-shaped, the filter is tilted, the sewage outlet is located on the filter box at the lower end of the filter, filter holes are provided on both sides of the U-shaped surface of the filter, and the inner bottom surface of the filter is a polished surface. The U-shaped filter facilitates sewage discharge from the sewage outlet while preventing solid matter produced by filtration from accumulating in the filter.

[0014] Furthermore, the water collecting tank is provided with an automatic feeding device connected to the water collecting tank, and a decolorizing agent or a flocculant is added to the treated water in the water collecting tank through the automatic feeding device.

[0015] Furthermore, an automatic spraying device is provided on the upper part of the oxygen enrichment box, and a defoaming agent is sprayed on the aquaculture wastewater through the automatic spraying device to defoam bubbles generated during the nitrification process of the aquaculture wastewater.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention uses a lifting air supply device in conjunction with an air collecting aeration head to control the aeration depth while maintaining a good stirring effect on the wastewater during the nitrification cycle, making it difficult for sediment to accumulate in the oxygen enrichment box, avoiding the need for regular cleaning of the equipment due to sedimentation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the open state of the present invention;

[0019] Figure 2 Schematic diagram of the structure of the coarse filtration device;

[0020] Figure 3 This is a schematic diagram of the structure of the inclined filter water collection tank;

[0021] Figure 4 This is a schematic diagram of the structure of the gas-gathering aeration head;

[0022] Figure 5 Schematic diagram of the oxygen enrichment box structure;

[0023] Figure 6 for Figure 4 A magnified schematic diagram of the structure of part A in the middle;

[0024] Figure 7 Schematic diagram of the side cross-section structure of the filter.

[0025] In the figure: 1. Coarse filtration device; 101. Filter box; 102. Filter screen; 103. Sewage inlet; 104. Sewage outlet; 2. Sludge tank; 3. Anaerobic box; 301. Observation window; 302. Pressure relief valve; 4. Sewage pump 1; 5. Sewage pump 2; 6. Pipe 1; 7. Return pipe; 8. Oxygen enrichment box; 9. Sewage pump 3; 10. Sewage pump 4; 11. Inclined filter water collection tank; 111. Inclined filter box; 112. Vertical filter tube; 113. Filter plate; 114. Water collection pipe; 115. Water collection tank; 116. Drain pipe; 117. Water pump 6; 1 18. Mud storage funnel; 119. Sewage pump seven; 12. Sewage pump five; 13. Air supply device; 131. Pipe support; 132. Lifting mechanism; 133. Air supply pipe; 134. Air pump; 14. Air collecting aeration head; 141. Sliding block; 142. Air collecting rubber barrel; 143. Threaded connection seat; 144. Aeration port; 145. Housing; 147. Snap ring; 148. Limiting ring; 15. Colony plate; 16. Automatic feeding device; 17. Automatic spraying device; 171. Spray pipe; 172. Rotating spray head; 173. Spray water pump. DETAILED DESCRIPTION

[0026] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] like Figure 1-Figure 7As shown, a decolorization treatment equipment for aquaculture wastewater includes a coarse filtration device 1, which is connected to a sludge tank 2 and an anaerobic tank 3 through a pipeline. A sewage pump 1 4 and a sewage pump 2 5 are respectively arranged on the pipeline connecting the sludge tank 2 and the anaerobic tank 3 on the coarse filtration device 1. The anaerobic tank 3 is connected to the oxygen-enriched tank 8 through a pipeline 1 6 and a return pipeline 7. A sewage pump 3 9 is arranged on the pipeline 1 6. The sewage pump 3 9 can pump the wastewater in the anaerobic tank 3 into the oxygen-enriched tank 8. A sewage pump 4 10 is arranged on the return pipeline 7. The sewage pump 4 10 can pump the wastewater in the oxygen-enriched tank 8 into the anaerobic tank 3. The pipeline 1 6 connects the oxygen-enriched tank 8 and the lower part of the anaerobic tank 3. The return pipeline 7 connects the anaerobic tank 3 and the upper part of the oxygen-enriched tank 8. The oxygen-enriched tank 8 is connected to the oblique filtration water collection tank 11 through a pipeline. The oxygen-enriched tank 8 is connected to the oblique filtration water collection tank A sewage pump 5 12 is provided on the pipeline of the water tank 11, and the coarse filtration device 1 includes a filter box 101. A horizontal filter screen 102 is welded and fixed in the filter box 101. The filter screen divides the filter box 101 into a discharge area and a filtration area from top to bottom. A sewage inlet 103 is provided on the filter box 101 on the left side of the discharge area, and a sewage outlet 104 is provided on the filter box 101 on the right side of the discharge area. The sewage outlet 104 pipeline is connected to the sludge tank 2, and the filtration area pipeline is connected to the anaerobic box 3. The anaerobic box 3 is a closed box. An openable observation window 301 is provided on the upper side of the anaerobic box 3. A pressure relief valve 302 is provided on the anaerobic box 3. The oxygen-enriched box 8 includes an oxygen-enriched box with an open upper side. A liftable air supply device 13 is provided in the oxygen-enriched box. The air supply device 13 is connected There are multiple air collecting aeration heads 14 located in the oxygen-enriched box. The air collecting aeration head 14 includes a sliding block 141. A magnet groove is provided on the lower side of the sliding block 141. An annular magnet is embedded and fixed in the magnet groove. An air collecting rubber barrel 142 is provided at the lower part of the sliding block 141. An iron ring is passed through the upper side of the air collecting rubber barrel 142. The size of the iron ring is the same as that of the annular magnet. The upper part of the air collecting rubber barrel 142 is fitted with the lower part of the sliding block 141 through magnetic adsorption. The air supply device 13 includes multiple air supply pipes 133 that are vertically inserted into the oxygen-enriched box. A vertical circular hole is provided in the middle of the sliding block 141. The lower part of the air supply pipe 133 slides through the circular hole on the sliding block 141 and the outer wall of the air supply pipe 133 is fitted with the gap between the circular hole and the inner bottom surface of the air collecting rubber barrel 142. A threaded connection seat 143 is provided with an integral body, and an external thread is provided on the outer side surface of the bottom of the air supply pipe 133. The lower end of the air supply pipe 133 is fixedly connected to the threaded base in the air collecting rubber barrel 142 by a thread. The side wall of the air supply pipe 133 is provided with an air supply hole located in the air collecting rubber barrel 142. The inclined filter water collecting box 11 includes an inclined filter box body 111. A vertical filter tube 112 is provided in the inclined filter box body 111. The upper end is connected to the oxygen enrichment box 8 through a pipe seal. The vertical filter tube 112 is surrounded by a filter plate 113 inclined upward. A hollow interlayer is provided in the middle of the filter plate 113, and the interlayer is connected to the vertical filter tube 112. A surrounding water collecting pipe 114 is welded on the side of the filter plate 113 away from the vertical filter tube 112. The interlayer of the filter plate 113 is connected to the inside of the water collecting pipe 114.The lower end of the water collection pipe 114 is closed, and the upper end of the water collection pipe 114 is connected to the inside of the water collection tank 115. The water collection tank 115 is equipped with a drain pipe 116, and the drain pipe 116 is equipped with a water pump 117. The lower end of the vertical filter tube 112 is connected to a sludge storage funnel 118. The bottom of the sludge storage funnel 118 is connected to a sewage discharge device, which includes a sewage pump 119 and a pipe connected to the sludge tank 2.

[0028] In this embodiment, the air supply device 13 includes a pipe support 131, which is a square tube horizontally arranged and welded into a square platform. The four sides of the pipe support 131 are provided with downwardly extending square tubes. A lifting mechanism 132 is fixedly installed on the outer wall of the oxygen-enriched box 8. The lifting mechanism 132 can be a rack lifter. The downward-extending square tubes arranged on the four sides of the pipe support 131 are fixedly welded to the output end of the rack lifter. The air supply pipe 133 is fixedly installed on the pipe support 131. The air supply pipe 133 includes a horizontal tube arranged horizontally on the pipe support 131. The horizontal tube is fixed by a clamp along the top of the square tube. The two sides of the horizontal tube are connected to downward-extending vertical tubes. The horizontal tube is connected to the air pump 134 through a hose. The hose is reserved for a length greater than the stroke of the rack lifter.

[0029] In this embodiment, a plurality of colony plates 15 are fixedly mounted on the air supply pipe 133. The colony plates 15 are disc-shaped with circular holes and hollow patterns on the surface of the colony plates. The colony plates 15 are sleeved on the air supply pipe 133 and fixed by clamps mounted on the upper and lower parts of the colony plates 15.

[0030] In this embodiment, the lower side surface of the sliding block 141 is conical.

[0031] In this embodiment, an outer shell 145 is provided on the outside of the air collecting aeration head 14. The outer shell 145 is square and a cylindrical cavity is provided inside the outer shell 145. The bottom of the air collecting rubber barrel 142 is bonded and fixed to the inner side surface of the bottom of the outer shell 145. The upper edge of the air collecting rubber barrel 142 is provided with an integrally connected rubber clamping ring 147. The inner side surface of the outer shell 145 is integrally formed with a limiting ring 148 located on the upper part of the clamping ring 147. The inner diameter of the limiting ring 148 is larger than the sliding block 141 and smaller than the outer diameter of the clamping ring 147. The four sides of the outer shell 145 are surrounded by aeration ports 144.

[0032] In this embodiment, the aeration opening 144 is opened from the inside to the outside and is inclined downward.

[0033] In this embodiment, a socket is provided on the side of the shell 145 , and support rods are inserted into the sockets between the shells 145 , and both ends of the support rods are clamped and fixed in the sockets.

[0034] In this embodiment, the cross-section of the filter screen 102 is U-shaped, the upper two sides of the filter screen 102 are welded and fixed to the filter box 101, the filter screen 102 is set at an angle, the sewage outlet 104 is located on the filter box 101 at the lower end of the filter screen 102, and filter holes are opened on both sides of the U-shaped surface of the filter screen 102, and the U-shaped inner bottom surface of the filter screen 102 is a polished surface.

[0035] In this embodiment, the water collecting box 115 is provided with an automatic feeding device 16 connected to the water collecting box 115. The automatic feeding device 16 can adopt the automatic feeding machine of the existing technology. A pipe connected to the inside of the water collecting box 115 is installed at the discharge port of the feeding machine, and the feeding is performed regularly through the automatic feeding machine.

[0036] In this embodiment, an automatic spraying device 17 is provided on the upper part of the oxygen enrichment box 8. The automatic spraying device 17 can be adopted by setting up a spraying pipe 171 on the oxygen enrichment box 8 and installing a rotating spraying head 172 on the spraying pipe 171. The spraying pipe 171 is connected to a spraying water pump 173.

[0037] When the present invention is in use, the sewage inlet 103 on the filter box 101 is connected to the aquaculture wastewater discharge port, and the aquaculture wastewater can be filtered through the filter screen 102. The filtered sludge will be accumulated at the sewage outlet 104. The sludge can be cleaned into the sludge pool 2 by regularly starting the sewage pump 104. The sewage filtered by the filter screen 102 enters the anaerobic box 3 through the sewage pump 25, and then enters the oxygen-enriched box 8 through the pipe 16. The air supply device 13 is started to aerate the wastewater in the oxygen-enriched box 8, so that the wastewater completes the nitrification reaction, and the reflux is started. The sewage pump 4 10 on the pipeline 7 allows the nitrified wastewater to enter the anaerobic box 3 to complete the denitrification cycle. The circulated wastewater can enter the vertical filter tube 112 through the sewage pump 5 12. The sewage pump 7 119 is in the closed state. The wastewater will pass through the filter plate 113 and enter the water collection pipe 114 and then be stored in the water collection tank 115. The sediment in the wastewater will sink and filter through the filter plate 113 and be concentrated in the sludge storage funnel 118. After the water collection is completed, the filtered impurities can be discharged into the sludge pool 2 by starting the sewage pump 7 119 connected to the sludge storage funnel 118.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A decolorization treatment device for aquaculture wastewater, including a coarse filtration device, characterized in that: The coarse filtration device is connected to the sludge tank and the anaerobic box, the anaerobic box is connected to the oxygen-enriched box through pipe 1 and the return pipe, the oxygen-enriched box is connected to the oblique filtration water collection box, the coarse filtration device includes a filter box body, a filter screen is provided in the filter box body, the filter screen divides the filter box body into a discharge area and a filter area, the discharge area is provided with a sewage inlet and a sewage outlet, the sewage outlet is connected to the sludge tank, and the filter area is connected to the anaerobic box; the anaerobic box is a closed box body, and a pressure relief valve is provided on the anaerobic box; the oxygen-enriched box includes an oxygen-enriched box body with an open upper side, and a liftable air supply device is provided in the oxygen-enriched box body, and the air supply device is connected to a plurality of air-collecting aeration heads located in the oxygen-enriched box body; the air-collecting aeration head includes a sliding block, and an air-collecting rubber barrel is provided at the lower part of the sliding block. The upper part of the air collecting rubber barrel is fitted with the lower part of the sliding block by magnetic adsorption, and the air supply device includes a plurality of air supply pipes vertically inserted into the oxygen-enriched box body, the lower part of the air supply pipe slides through the sliding block and is fixedly connected to the bottom of the air collecting rubber barrel, and the side wall of the air supply pipe is provided with an air supply hole located in the air collecting rubber barrel; the inclined filter water collecting box includes an inclined filter box body, a vertical filter pipe connected to the upper end of the oxygen-enriched box is provided in the inclined filter box body, a filter plate inclined upward is provided around the vertical filter pipe, a side of the filter plate away from the vertical filter pipe is connected to a water collecting pipe, the upper end of the water collecting pipe is connected to the water collecting box, a drain pipe is provided on the water collecting box, the lower end of the vertical filter pipe is connected to a sludge storage funnel, the bottom of the sludge storage funnel is connected to a sewage discharge device, and the sewage discharge device is connected to a sludge tank; An outer shell is provided outside the air collecting aeration head, and the bottom of the air collecting rubber barrel is fixedly connected to the inner side surface of the bottom of the outer shell. A clamping ring is provided on the upper edge of the air collecting rubber barrel, and a limiting ring is provided on the inner side surface of the outer shell, and the inner diameter of the limiting ring is larger than the sliding block and smaller than the clamping ring. An aeration port is opened around the side of the outer shell, and the aeration port is opened downwardly from the inside to the outside.

2. The aquaculture wastewater decolorization treatment equipment according to claim 1, characterized in that: The gas supply device includes a pipe bracket. A lifting mechanism is provided on the outer wall of the oxygen-enriched box. The lifting mechanism is fixedly connected to the pipe bracket. The gas supply pipe is fixedly installed on the pipe bracket and is connected to an air pump through a hose.

3. The aquaculture wastewater decolorization treatment equipment according to claim 2, characterized in that: A plurality of bacterial colony plates are fixedly mounted on the air supply pipe.

4. The aquaculture wastewater decolorization treatment equipment according to claim 1, characterized in that: The lower side surface of the sliding block protrudes outward.

5. The aquaculture wastewater decolorization treatment equipment according to claim 1, characterized in that: The shells are fixedly connected via support rods.

6. The aquaculture wastewater decolorization treatment equipment according to claim 1, characterized in that: The filter screen has a U-shaped cross section and is tilted. The sewage outlet is located on the filter box at the lower end of the filter screen. Filter holes are provided on both sides of the U-shaped surface of the filter screen, and the inner bottom surface of the filter screen is a polished surface.

7. The aquaculture wastewater decolorization treatment equipment according to claim 1, characterized in that: The water collecting tank is provided with an automatic feeding device which is connected to the water collecting tank.

8. The aquaculture wastewater decolorization treatment equipment according to claim 1, characterized in that: An automatic spraying device is provided on the upper part of the oxygen-enriched box.

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