CN114477633A - Maotai-flavor liquor wastewater advanced treatment process and system for bundled seed liquor brewing process - Google Patents
Maotai-flavor liquor wastewater advanced treatment process and system for bundled seed liquor brewing process Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/325—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from processes relating to the production of wine products
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
Abstract
The invention provides a system and a method for deeply treating Maotai-flavor liquor wastewater in a seed-bundling liquor brewing process, wherein the system comprises the following steps: the device comprises a denitrification filter for removing nitrate in the wastewater, a biological aerated filter for removing residual organic pollutants in the wastewater passing through the denitrification filter, an ozone reaction tower for removing residual organic pollutants and colored groups in the wastewater, and a high-density clarification filter tank for filtering suspended solids in the wastewater, which are sequentially arranged along the direction of water flow.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a deep treatment process and a deep treatment system for Maotai-flavor liquor wastewater in a seed-bundling liquor brewing process.
Background
The Renhuai city is located in the red river basin of Guizhou province and is the biggest high-quality Maotai-flavor liquor production base in China. Renhuai uses wine to make a stand-up market, uses wine to make a prosperous market, and the production of Maotai-flavor liquor is the pillar industry in Renhuai market. Besides large-scale wine enterprises in the middle and middle schools, a plurality of small wine enterprises and small workshops are densely distributed along two banks of the red river. With the rapid development of the liquor industry in Renhuai, the discharge amount of brewing wastewater increases year by year, and certain pressure is exerted on the ecological environment of the river basin of red water. Different from other white spirits, the Maotai-flavor white spirits have large water quantity and water quality fluctuation due to multiple times of stewing and fermentation, and have the characteristics of high SS concentration, high organic matter concentration, high nitrogen and phosphorus concentration, high chroma and the like. In 2011, new discharge standard of pollutants of fermented alcohol and distilled spirit industrial water begins to be implemented. As the river basin of red water belongs to a sensitive basin, the requirements of the Renhuai city on the discharge of the brewing wastewater meet the strictest industrial table 3 standard, the COD of the effluent is required to be less than or equal to 50mg/L, the TN is required to be less than or equal to 15mg/L, and the chroma is required to be less than or equal to 20 mg/L.
The Maotai-flavor liquor prepared by the brewing process of the bundled seed liquor generally needs repeated fermentation and distillation for many times in the brewing process, the chroma of the produced wastewater is gradually deepened along with the increase of the distillation times, the pollutant concentration is gradually increased, particularly in 5, 6 and 7 batches (namely 5-9 months), and the drainage pollution concentration of the Maotai-flavor liquor wastewater is higher and higher due to the improvement of the integral clean production requirement of the industry and the improvement of the cooling water recycling rate. The existing single and original advanced treatment process has poor TN and chroma removal effect and is difficult to ensure to stably reach the discharge standard shown in the table 3 of the discharge standards of pollutants for fermented alcohol and white spirit industrial water.
Disclosure of Invention
The invention mainly aims to provide a process and a system for deeply treating Maotai-flavor liquor wastewater in a seed-bound liquor brewing process.
In order to achieve the above purposes, the technical scheme adopted by the invention is as follows: a deep treatment system for Maotai-flavor liquor wastewater of a bundled seed liquor brewing process comprises: the device comprises a denitrification filter for removing nitrate in the wastewater, a biological aerated filter for removing carbon sources and organic pollutants in the wastewater passing through the denitrification filter, an ozone reaction tower for removing residual organic pollutants and colored groups in the wastewater, and a high-density clarification filter tank for filtering the pollutants in the wastewater, which are sequentially arranged along the direction of water flow.
Preferably, the denitrification filter comprises:
the opening of the first tank body is upward, and a first water outlet is formed in the upper end of the first tank body;
the first filter plate is arranged in the first tank body, a first gap is formed between the first filter plate and the bottom of the first tank body, the first gap is connected with the first water inlet pipe, and wastewater enters the first gap along the first water inlet pipe;
the first supporting layer is arranged on the first filter plate and consists of pebbles laid on the first filter plate;
the first packing layer is arranged on the first bearing layer and consists of ceramsite laid on the first bearing layer, and the average grain size of the ceramsite is smaller than that of pebbles;
and the first filter head is arranged on the first filter plate and penetrates through the first bearing layer.
Preferably, the biological aerated filter comprises:
the opening of the second tank body is upward, and a second water outlet is formed in the upper end of the second tank body;
the second filter plate is arranged in the second tank body, a second gap is formed between the second filter plate and the bottom of the second tank body, the first water outlet is arranged with the second gap through a second water inlet pipe, and the second gap is lower than the first water outlet;
the second supporting layer is arranged on the second filter plate and consists of pebbles laid on the second filter plate;
the second packing layer is arranged on the second bearing layer and consists of ceramsite laid on the second bearing layer, and the average particle size of the ceramsite is smaller than that of the pebbles;
and the second filter head is arranged on the second filter plate and penetrates through the second bearing layer.
Preferably, the device also comprises a first backwashing water inlet pipe, the first backwashing water inlet pipe is respectively communicated with the first gap of the denitrification filter tank and the second gap of the biological aerated filter tank through a third valve, a first backwashing water outlet is arranged at the top of the denitrification filter tank, and a second backwashing water outlet is arranged at the top of the biological aerated filter tank.
Preferably, the ozone reaction tower comprises:
the tower body is cylindrical, and a first water inlet is formed in the top of the tower body;
the aeration module, the setting just is close to the position department of tower body bottom in the tower body, the aeration module communicates with the first intake pipe that sets up in the tower body outside, inputs ozone to the aeration module through first intake pipe, the aeration module includes main trachea, a plurality of bronchus of arranging along main tracheal axis direction and set up a plurality of gas distribution dish on the bronchus, main trachea with first intake pipe intercommunication is a plurality of the bronchus with main trachea intercommunication, main trachea horizontal arrangement, a plurality of bronchus are located same horizontal plane to be provided with the support respectively in the both sides of main trachea, the support is used for connecting a plurality of bronchus, all is provided with a plurality of gas distribution dishes on each bronchus, the vertical setting of axis of gas distribution dish and the end of giving vent to anger up.
Preferably, the high density clarification filtration tank comprises:
a third tank body with an upward opening;
the coagulation tank is arranged in the third tank body, a coagulation mixer is arranged in the coagulation tank, and a first medicine adding pipe is arranged on one side of the coagulation tank and is used for adding a PAC (poly aluminum chloride) medicine into the coagulation tank;
the flocculation tank is arranged in the third tank body, a flocculation stirrer is arranged in the flocculation tank on at least one side of the coagulation tank along a first direction, a second dosing pipe is arranged on one side of the flocculation tank and used for heating a PAM (polyacrylamide) medicament in the flocculation tank, the flocculation tank is communicated with the coagulation tank at a position close to the bottom, and the first direction is a horizontal direction;
the water distribution tank is arranged on one side of the coagulation tank along a second direction, the second direction is perpendicular to the horizontal direction of the first direction, the water distribution tank extends along the first direction, and a first water passing hole is formed in the position on the examination on the side wall shared by the flocculation tank and the water distribution tank.
Preferably, the high density clarification filtration tank further comprises:
the first sedimentation tank is arranged on one side of the water distribution tank opposite to the two coagulation tanks, the depth of the first sedimentation tank is greater than that of the water distribution tank, the tank bottom of the water distribution tank is communicated with the first sedimentation tank, an inclined plate filter is arranged in the first sedimentation tank, and the highest position of the inclined plate filter is not lower than the tank bottom of the water distribution tank;
the mud scraper is arranged in the first sedimentation tank, and a mud scraping mechanism of the mud scraper is positioned at the bottom of the first sedimentation tank;
the sludge return pipe is arranged at the bottom of the first sedimentation tank and located below the sludge scraping mechanism, one end of the sludge return pipe extends to the outer side of the third tank body, and a sludge return pump is connected to one end of the sludge return pipe, which extends to the outer side of the third tank body.
Preferably, the method further comprises the following steps:
the water outlet weirs are arranged in the first sedimentation tank and are positioned above the inclined plate filters, the plurality of water outlet weirs are arranged along the first direction, each water outlet weir extends along the second direction, and the height of each water outlet weir is lower than that of the first water passing hole;
the water collecting weir is arranged on one side of the water outlet weir, which is far away from the water distribution tank, the upper end opening of the water collecting weir is lower than the bottom of the water outlet weir, and water in the water outlet weir automatically flows into the water collecting weir;
the first filtering ponds have two, set up the weir that catchments with the opposite one side of first sedimentation tank has set gradually third packing layer, third supporting layer, third filter plate from the top down in every first filtering pond be provided with the third filter head on the third filter plate, the third filter plate with have the third clearance between the bottom of the pool of first filtering pond, a plurality of third clearances and same outlet pipe intercommunication.
The invention also provides a high-density clarification filter tank, which is characterized by comprising the following components:
a third tank body with an upward opening;
the coagulation tank is arranged in the third tank body, a coagulation mixer is arranged in the coagulation tank, and a first dosing pipe is arranged on one side of the coagulation tank and used for adding a PAC (poly aluminum chloride) medicament into the coagulation tank;
the flocculation tank is arranged in the third tank body, a flocculation stirrer is arranged in the flocculation tank on at least one side of the coagulation tank along a first direction, a second dosing pipe is arranged on one side of the flocculation tank and used for heating a PAM (polyacrylamide) medicament in the flocculation tank, the flocculation tank is communicated with the coagulation tank at a position close to the bottom, and the first direction is a horizontal direction;
the water distribution tank is arranged on one side of the coagulation tank along a second direction, the second direction is a horizontal direction perpendicular to the first direction, the water distribution tank extends along the first direction, and a first water passing hole is formed in a position on a test on the common side wall of the flocculation tank and the water distribution tank;
the first sedimentation tank is arranged on one side of the water distribution tank opposite to the two coagulation tanks, the depth of the first sedimentation tank is greater than that of the water distribution tank, the tank bottom of the water distribution tank is communicated with the first sedimentation tank, an inclined plate filter is arranged in the first sedimentation tank, and the highest position of the inclined plate filter is not lower than the tank bottom of the water distribution tank;
the mud scraper is arranged in the first sedimentation tank, and a mud scraping mechanism of the mud scraper is positioned at the bottom of the first sedimentation tank;
the sludge return pipe is arranged at the bottom of the first sedimentation tank and is positioned below the mud scraping mechanism, one end of the sludge return pipe extends to the outer side of the third tank body, and one end of the sludge return pipe extending to the outer side of the third tank body is connected with a sludge return pump;
the water outlet weirs are arranged in the first sedimentation tank and are positioned above the inclined plate filters, the plurality of water outlet weirs are arranged along the first direction, each water outlet weir extends along the second direction, and the height of each water outlet weir is lower than that of the first water passing hole;
the water collecting weir is arranged on one side of the water outlet weir, which is far away from the water distribution tank, the upper end opening of the water collecting weir is lower than the bottom of the water outlet weir, and water in the water outlet weir automatically flows into the water collecting weir;
the first filtering ponds have two, set up the weir that catchments with the opposite one side of first sedimentation tank has set gradually third packing layer, third supporting layer, third filter plate from the top down in every first filtering pond be provided with the third filter head on the third filter plate, the third filter plate with have the third clearance between the bottom of the pool of first filtering pond, a plurality of third clearances and same outlet pipe intercommunication.
The invention also provides a method for deeply treating the Maotai-flavor liquor wastewater in the seed wine bundling brewing process, which is characterized by comprising the following steps of:
step one, performing denitrification treatment on wastewater;
step two, adding a carbon source into the wastewater obtained in the step one for carbonization treatment;
step three, introducing ozone into the wastewater obtained in the step two for oxidation and decoloration treatment;
and step four, sequentially carrying out coagulation, flocculation, precipitation and filtration treatment on the wastewater obtained in the step four.
Compared with the prior art, the invention has the following beneficial effects:
the system and the method treat the wastewater through a plurality of processes such as denitrification, nitrification, oxidation decoloration, coagulation, flocculation, precipitation, filtration and the like, and can achieve better treatment effect.
Drawings
FIG. 1 is a schematic diagram in accordance with a preferred embodiment of the present invention;
FIGS. 2 and 3 are structural views of a denitrification filter and a biological aerated filter;
FIGS. 4 to 7 are structural views of an ozone reaction tower;
fig. 8-13 are block diagrams of high density clarification filtration tanks.
Detailed Description
The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.
Example one
As shown in fig. 1-13, the system for deeply treating Maotai-flavor liquor wastewater in a seed wine brewing process comprises a denitrification filter 2, an aeration biological filter 3, an ozone reaction tower 3 and a high-density clarification filter 6 which are sequentially arranged along the direction of water flow, wherein the denitrification filter 2 is used for removing nitrates in the wastewater, the aeration biological filter 3 is used for removing residual carbon sources and organic pollutants in the wastewater passing through the denitrification filter, and the ozone reaction tower 3 is used for removing residual organic pollutants and colored groups in the wastewater, so that COD removal and decoloration are achieved.
The number of the denitrification filter chambers 2 is two, and the wastewater is respectively communicated with the denitrification filter chambers 2 through two first water inlet pipes 208. Each denitrification filter 2 includes first cell body 201 that the opening faces upwards, set up in first cell body 201 and be close to first filter plate 202 at the bottom of the pool of first cell body 201, support first supporting layer 204 on first filter plate 202, support first packing layer 205 on first supporting layer 204 be provided with a plurality of first filter heads 203 on first filter plate 202, first filter head 203 extends from top to bottom and runs through first filter plate 202. The first filter plate 202 and the bottom of the first tank 201 have a first gap, the first water inlet pipe 208 is communicated with the first gap, that is, the wastewater in the first water inlet pipe 208 enters from the bottom of the first tank 201, flows from bottom to top, and sequentially passes through the first filter head 203 and the first packing layer 205. First valves are arranged on the first water inlet pipes 208, and the first valves can control the conduction and the closing of the first water inlet pipes 208. A carbon source dosing pipe (methanol or sodium acetate) 211 is respectively arranged on the two first water inlet pipes 208 and is used for dosing the first water inlet pipe 208 through a pipeline mixer to provide a carbon source for denitrification reaction. One end of the first water inlet pipe 208, which is far away from the first gap, is connected with a first water pump 1, and wastewater is injected into the denitrification filter 2 through the first water pump 1.
The first supporting layer 204 is composed of pebbles laid on the first filter plate 202, and the diameter of the pebbles is 16-32 mm. The first filler layer 205 is composed of ceramsite which is laid on the first bearing layer 204, and the diameter of the ceramsite is 4-6 mm.
The biological aerated filter 3 comprises a second filter body 301, a second filter plate 302 which is arranged in the second filter body 301 and is close to the bottom of the filter body, a second supporting layer 304 which is supported on the second filter plate 302, and a second filler layer 305 which is supported on the second supporting layer 304, wherein a plurality of second filter heads 303 are arranged on the second filter plate 302, and the second filter heads 303 penetrate through the second filter plate 302 and the second supporting layer 304. A second gap is formed between the second filter plate 302 and the bottom of the second tank body 301. A first water outlet 206 is arranged at the top of the first tank body 201, and the first water outlet 206 is communicated with the second gap by a second water inlet pipe 306. The wastewater from the first water outlet 206 of the denitrification filter 2 enters the second gap, passes through the second filter head 302 and the second filler layer 305 from bottom to top, and is discharged from a second water outlet 307 arranged at the top of the second tank body 301. The upper end of the second tank body 301 is opened.
The second supporting layer 304 is composed of pebbles which are laid on the second filter plate 302 and are arranged on the second filter plate 302, and the diameter of each pebble is 16-32 mm. The second filler layer 305 is composed of ceramic grains laid on the second bearing layer 304, and the diameter of the ceramic grains is between 4 and 6 mm.
The denitrification filter 2 and the biological aerated filter 3 are respectively provided with two, the second water inlet pipe 306 is simultaneously connected with the first water outlet 206 of the two denitrification filters 2 and is simultaneously communicated with the second gap of the two biological aerated filters 3, and the height of the first water outlet 206 is lower than that of the second water outlet 307, so that the wastewater discharged from the first water outlet 206 can automatically flow into the biological aerated filter 3 and can be discharged from the second water outlet 307. Preferably, the second water inlet pipe 306 is respectively communicated with the second gap through two second valves 311, and the second valve 311 can control which biological aerated filter 3 is filled with water.
The system is also provided with a first back-washing water inlet pipe 209, the first back-washing water inlet pipe 209 is respectively communicated with the first gap of the denitrification filter 2 and the second gap of the biological aerated filter 3 through a third valve 210, and the back washing of one of the denitrification filter 2 and the biological aerated filter 3 can be controlled by controlling the opening and closing of the third valve 210. A first back washing water outlet 207 is arranged at the top of each denitrification filter 2, and a second back washing water outlet 308 is arranged at the top of each aeration biological filter 3, so that the back washing water can be discharged to a designated place through the first back washing water outlet 207 and the second back washing water outlet 308. The denitrification filter 2 and the biological aerated filter 3 can be washed by backwashing.
Preferably, the system further comprises two first air inlet pipes 309, wherein the two first air inlet pipes 309 are respectively communicated with an aeration pipeline of a second supporting layer arranged in the biological aerated filter 3, and air introduced into the biological aerated filter 3 is discharged from the water surface. The introduction of air is used to supply dissolved oxygen to the microorganisms.
The ozone reaction tower 5 has three. The water discharged from the biological aerated filter 3 is introduced into the first intermediate tank 4, the water in the first intermediate tank 4 is introduced into the three ozone reaction towers 5 through the lift pump and the third water inlet pipe 59, respectively, and a second water pump 41 is connected to one end of the third water inlet pipe 59 located in the first intermediate tank 4, the second water pump 41 being for feeding the water in the first intermediate tank 4 into the three ozone reaction towers 45 along the third water outlet pipe 59.
The three ozone reaction towers 5 have the same structure, and each ozone reaction tower comprises a cylindrical tower body 51 and an aeration module 52 arranged in the tower body 51, wherein the aeration module 52 is arranged at the bottom of the tower body 51, the aeration module 52 is communicated with a first air inlet pipe 512 arranged at the outer side of the tower body 51, and ozone is input into the aeration module 52 through the first air inlet pipe 512. The top of the tower body 51 is provided with a first water inlet 57, and the third water inlet pipe 59 is connected to the first water inlet 57. The aeration module 52 comprises a main air pipe 53, a plurality of branch air pipes 54 arranged along the axial direction of the main air pipe 53 and a plurality of air distribution discs 55 arranged on the branch air pipes 54, wherein the main air pipe 53 is communicated with the first air inlet pipe 512, the plurality of branch air pipes 54 are communicated with the main air pipe 53, the main air pipe 53 is horizontally arranged, the plurality of branch air pipes 54 are positioned on the same horizontal plane, brackets 56 are respectively arranged on two sides of the main air pipe 53, and the brackets 56 are used for connecting the plurality of branch air pipes 54, so that the stability of the whole aeration module 52 is improved. All be provided with a plurality of air distribution dish 55 on each bronchus 54, the vertical setting of axis of air distribution dish 55 and the end of giving vent to anger is up, can make ozone disperse to aquatic evenly through aeration module 52, reacts with the material in aquatic, reaches better treatment.
The bottom of the tower body 51 is communicated with a fourth water discharge pipe 516, the fourth water discharge pipe 516 is communicated with the high-density clarifying and filtering tank 6, and the water in the ozone reaction tower 5 enters the high-density clarifying and filtering tank 6 through the fourth water discharge pipe 516.
A first air outlet 58 is provided at the upper end of the tower body 51, and the first air outlet 58 is connected to a corresponding exhaust gas treatment device 510 through a first air outlet pipe 515 to treat the discharged ozone gas which is not used yet.
The high-density clarifying and filtering tank 6 comprises a third tank body 61 with an upward opening, two coagulation tanks 63 are arranged in the third tank body 61, and the two coagulation tanks 63 are arranged along a first direction which is a horizontal direction. And flocculation ponds 64 are arranged on two sides of each coagulation pond 63 along the first direction, each coagulation pond 63 is communicated with the corresponding two flocculation ponds 64 at the bottom, and water in the coagulation pond 63 enters the two flocculation ponds 64 from the bottom. And a first dosing pipe 623 for adding PAC (polyaluminium chloride) agents is arranged on one side of the coagulation tank 63, and a second dosing pipe 624 for adding PAM agents is arranged on one side of the flocculation tank 64. A coagulation mixer 65 is provided in the coagulation tank 63 for uniformly mixing the PAC reagent and the wastewater. A flocculation stirrer 66 is provided in the flocculation tank 64 for mixing the PAM chemical with the wastewater.
A water distribution groove 67 is provided on one side of the coagulation tank 63 along a second direction, which is a horizontal direction perpendicular to the first direction. A first water through hole 625 is formed in the position, close to the upper side, on the side wall where the flocculation tank 64 is connected with the water distribution tank 67, and water in the flocculation tank 64 enters the water distribution tank 67 through the first water through hole 625.
A second water inlet 62 is provided on the side of the coagulation tank 63 facing away from the water distribution tank 67, and the wastewater discharged from the ozone reaction tower 5 can be uniformly distributed and fed into the coagulation tank 63 through the second water inlet 62 and the water distribution weir.
The side of the water distribution tank 67 opposite to the two coagulation tanks 63 is respectively provided with a first sedimentation tank 68, the depth of the first sedimentation tank 68 is greater than that of the water distribution tank 67, the bottom of the water distribution tank 67 is communicated with the first sedimentation tank 68, an inclined plate filler 611 is arranged in the first sedimentation tank 68, and the highest position of the inclined plate filler 611 is not lower than the bottom of the water distribution tank 67, so that the wastewater entering the first sedimentation tank 68 must pass through the inclined plate filler 611 when flowing upwards, and flocculates and other pollutants in the wastewater are removed.
A mud scraper 610 is arranged in each first sedimentation tank 68, and a mud scraping mechanism of the mud scraper 610 is positioned at the bottom of the first sedimentation tank 68 and is used for scraping sediment deposited at the bottom of the first sedimentation tank to a middle mud discharging hole. A sludge return pump 613 is arranged at the bottom of the first sedimentation tank 68 and below the mud scraping mechanism, one end of the sludge return pump 613 extends to the outside of the third tank body 61, and a sludge return pump 614 is connected to one end of the sludge return pump 613, which extends to the outside of the third tank body 61, through which the sludge return pump 614 can discharge the sediments sedimented in the first sedimentation tank 68.
A plurality of effluent weirs 69 are disposed in the first settling tank 68 above the inclined plate packing 611, the plurality of effluent weirs 69 are arranged along the first direction, each effluent weir 69 extends along the second direction, and the height of the effluent weir 69 is lower than that of the first water through hole 625, so as to ensure that water flowing out of the water distribution tank 67 can automatically enter the effluent weir 69 without external force. A water collecting weir 626 is arranged on the side of the water outlet weir 69, which is far away from the water distribution tank 67, a plurality of water outlet weirs 69 corresponding to the same sedimentation tank 68 are connected with the same water collecting weir 626, the upper end opening of the water collecting weir 626 is lower than the bottom of the water outlet weir 69, and the water in the water outlet weir 69 automatically flows into the water collecting weir 626.
Two first filter tanks 612 are arranged on one side of each water collecting weir 626 opposite to the first sedimentation tank 68, a third filler layer 619, a third supporting layer 620 and a third filter plate 621 are sequentially arranged in each first filter tank 612 from top to bottom, a third filter head 622 is arranged on the third filter plate 621, a third gap is formed between the third filter plate 621 and the bottom of the first filter tank 612, a plurality of third gaps are communicated with the same water outlet pipe 615, and water discharged from the water outlet pipe 615 meets the discharge standard. The third packing layer 619 is made of quartz sand, the particle diameter of the quartz sand is 1-2mm, and the third bearing layer 620 is made of pebbles.
A second backwash water inlet pipe 616 communicated with the third gap is arranged on each first filter tank 612, and the second backwash water inlet pipe 616 can inject wash water into the third gap, wherein the injected wash water flows from bottom to top. A back-washing drainage groove 618 is arranged in the first filter tank 612 and right above the third filler layer 619, the back-washing drainage groove 618 extends along the second direction, the height of the upper end of the back-washing drainage groove 618 is lower than that of the water collection groove 626, the height of the back-washing drainage groove 618 gradually decreases along the direction away from the water collection groove 626, and during back washing, when the back-washing water in the first filter tank 612 rises to the height of the back-washing drainage groove 618, the back-washing water enters the back-washing drainage groove 618 and is discharged along the back-washing drainage groove 618. A second backwash water discharge pipe 617 is connected to a lower end of the backwash water discharge tank 618, and backwash water discharged from the backwash water discharge tank 618 can be guided to a predetermined position by the second backwash water discharge pipe 617.
Preferably, a back-flushing air inlet pipe 612 is arranged on the side wall of the first filtering tank 612 and at a position corresponding to the third gap, and during back flushing, air can be introduced for back flushing.
Example two
This embodiment provides a sauce flavor type white spirit waste water advanced treatment process of bundle seed wine brewing technology, adopts above-mentioned system, specifically includes the following step:
firstly, feeding wastewater to be treated into a first gap from the bottom of a denitrification filter 2 along a first water inlet pipe 208, sequentially passing through a first filter head 203 and a first filler layer 205 from bottom to top, discharging the wastewater from a first water outlet 206, and injecting a carbon source into the first water inlet pipe 208 in the process of feeding the wastewater into the denitrification filter 2;
step two, wastewater discharged from the first water outlet 206 enters a second gap through a second water inlet pipe 306, and the wastewater entering the second gap sequentially passes through a second filter head 303 and a second filler layer 305 from bottom to top and is discharged from a second water outlet 307;
step three, the wastewater discharged from the second water outlet 307 enters from the top of the ozone reaction tower 5 through the third water discharge pipe 59, and in the process that the wastewater enters into the ozone reaction tower 5, the aeration module 52 aerates and discharges the wastewater in the ozone reaction tower 5 from the bottom thereof;
and step four, the wastewater discharged from the ozone reaction tower 5 enters the high-density clarifying filter tank 6 through a fourth water discharge pipe 516 for filtering and clarifying, and the water discharged from the high-density clarifying filter tank 6 meets the discharge standard.
Preferably, after the first step and the second step are performed for a while, water may be injected into the first gap or the second gap through the first backwash water inlet pipe 209 to backwash the denitrification filter 2 and the biological aerated filter 3, and backwash water is discharged from the first backwash water outlet 207 or the second backwash water outlet 308, respectively.
Preferably, the fourth step specifically includes the following steps:
step 4.1: the wastewater discharged from the ozone reaction tower 5 is sent into a coagulation tank 63 through a second water inlet 62, a coagulation mixer 65 in the coagulation tank 63 continuously rotates, and a PAC agent is added into the coagulation tank 63 through a first agent adding pipe 623;
step 4.2: the water in the coagulation tank 63 is sent into a flocculation tank 64, a flocculation stirrer 66 in the flocculation tank 64 continuously rotates, and a PAM medicament is added into the flocculation tank 64 through a second medicament adding pipe 624;
step 4.3: the wastewater discharged from the flocculation tank 64 enters the bottom of a first sedimentation tank 68 through a water distribution tank 67, the water in the first sedimentation tank 68 flows from bottom to top and passes through an inclined plate filter 611, and a mud scraper 610 continuously rotates;
step 4.4: the water discharged from the upper end of the first sedimentation tank 68 enters the water collection weir 626 through the water outlet weir 69, the water in the water collection weir 626 flows into the first filter tank 612, and enters the third gap through the third packing layer 619, the third support layer 620 and the third filter head 622 in sequence, and the water in the third gap is discharged from the water outlet pipe 615.
In step 4.3, the sludge-return pump 614 is simultaneously operated to discharge the sludge in the first sedimentation tank 68 through the sludge return pipe 613.
After a period of operation, the first filter tank 612 needs to be backwashed. At this time, back washing water is fed into the third gap through the second back washing water inlet pipe 616, the back washing water flows from bottom to top and enters the back washing water discharge groove 617, and water in the back washing water discharge groove 618 is discharged to a prescribed position from the second back washing water discharge pipe 617.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A system and a method for deeply treating Maotai-flavor liquor wastewater in a seed-bundling liquor brewing process comprise the following steps: the device comprises a denitrification filter for removing nitrate in the wastewater, a biological aerated filter for removing the residual organic pollutants in the wastewater passing through the denitrification filter, an ozone reaction tower for removing the residual organic pollutants and colored groups in the wastewater and a high-density clarification filter tank for filtering solid suspended matters in the wastewater, which are sequentially arranged along the direction of water flow.
2. The system of claim 1, wherein the denitrification filter comprises:
the opening of the first tank body is upward, and a first water outlet is formed in the upper end of the first tank body;
the first filter plate is arranged in the first tank body, a first gap is formed between the first filter plate and the bottom of the first tank body, the first gap is connected with the first water inlet pipe, and wastewater enters the first gap along the first water inlet pipe;
the first supporting layer is arranged on the first filter plate and consists of pebbles laid on the first filter plate;
the first packing layer is arranged on the first bearing layer and consists of ceramic particles paved on the first bearing layer, and the average particle size of the ceramic particles is smaller than that of pebbles;
and the first filter head is arranged on the first filter plate and penetrates through the first bearing layer.
3. The system of claim 2, wherein the biological aerated filter comprises:
the opening of the second tank body is upward, and a second water outlet is formed in the upper end of the second tank body;
the second filter plate is arranged in the second tank body, a second gap is formed between the second filter plate and the bottom of the second tank body, the first water outlet is arranged with the second gap through a second water inlet pipe, and the second gap is lower than the first water outlet;
the second supporting layer is arranged on the second filter plate and consists of pebbles laid on the second filter plate;
the second packing layer is arranged on the second bearing layer and consists of ceramic particles laid on the second bearing layer, and the average particle size of the ceramic particles is smaller than that of pebbles;
and the second filter head is arranged on the second filter plate and penetrates through the second bearing layer.
4. The system of claim 4, further comprising a first backwash water inlet pipe, wherein the first backwash water inlet pipe is respectively communicated with the first gap of the denitrification filter and the second gap of the biological aerated filter through a third valve, a first backwash water outlet is arranged at the top of the denitrification filter, and a second backwash water outlet is arranged at the top of the biological aerated filter.
5. The system of claim 1, wherein the ozone reaction tower comprises:
the tower body is cylindrical, and a first water inlet is formed in the top of the tower body;
the aeration module, the setting just is close to the position department of tower body bottom in the tower body, the aeration module communicates with the first intake pipe that sets up in the tower body outside, inputs ozone to the aeration module through first intake pipe, the aeration module includes main trachea, a plurality of bronchus of arranging along main tracheal axis direction and set up a plurality of gas distribution dish on the bronchus, main trachea with first intake pipe intercommunication is a plurality of the bronchus with main trachea intercommunication, main trachea horizontal arrangement, a plurality of bronchus are located same horizontal plane to be provided with the support respectively in the both sides of main trachea, the support is used for connecting a plurality of bronchus, all is provided with a plurality of gas distribution dishes on each bronchus, the vertical setting of axis of gas distribution dish and the end of giving vent to anger up.
6. The system of claim 1, wherein the high density clarification filtration tank comprises:
a third tank body with an upward opening;
the coagulation tank is arranged in the third tank body, a coagulation mixer is arranged in the coagulation tank, and a first dosing pipe is arranged on one side of the coagulation tank and used for adding a PAC (poly aluminum chloride) medicament into the coagulation tank;
the flocculation tank is arranged in the third tank body, a flocculation stirrer is arranged in the flocculation tank on at least one side of the coagulation tank along the first direction, a second dosing pipe is arranged on one side of the flocculation tank and used for adding a PAM (polyacrylamide) medicament into the flocculation tank, the flocculation tank is communicated with the coagulation tank at a position close to the bottom, and the first direction is a horizontal direction;
the water distribution tank is arranged on one side of the coagulation tank along a second direction, the second direction is perpendicular to the horizontal direction of the first direction, the water distribution tank extends along the first direction, and a first water passing hole is formed in the position on the examination on the side wall shared by the flocculation tank and the water distribution tank.
7. The system of claim 6, wherein the high density clarification filtration tank further comprises:
the first sedimentation tank is arranged on one side of the water distribution tank opposite to the two coagulation tanks, the depth of the first sedimentation tank is greater than that of the water distribution tank, the tank bottom of the water distribution tank is communicated with the first sedimentation tank, an inclined plate filter is arranged in the first sedimentation tank, and the highest position of the inclined plate filter is not lower than the tank bottom of the water distribution tank;
the mud scraper is arranged in the first sedimentation tank, and a mud scraping mechanism of the mud scraper is positioned at the bottom of the first sedimentation tank;
the sludge return pipe is arranged at the bottom of the first sedimentation tank and located below the sludge scraping mechanism, one end of the sludge return pipe extends to the outer side of the third tank body, and one end of the sludge return pipe extending to the outer side of the third tank body is connected with a sludge return pump.
8. The system of claim 7, further comprising:
the water outlet weirs are arranged in the first sedimentation tank and are positioned above the inclined plate filters, the plurality of water outlet weirs are arranged along the first direction, each water outlet weir extends along the second direction, and the height of each water outlet weir is lower than that of the first water passing hole;
the water collecting weir is arranged on one side of the water outlet weir, which is far away from the water distribution tank, the upper end opening of the water collecting weir is lower than the bottom of the water outlet weir, and water in the water outlet weir automatically flows into the water collecting weir;
the first filtering ponds have two, set up the weir that catchments with the opposite one side of first sedimentation tank has set gradually third packing layer, third supporting layer, third filter plate from the top down in every first filtering pond be provided with the third filter head on the third filter plate, the third filter plate with have the third clearance between the bottom of the pool of first filtering pond, a plurality of third clearances and same outlet pipe intercommunication.
9. A high density clarification filtration tank comprising:
a third tank body with an upward opening;
the coagulation tank is arranged in the third tank body, a coagulation mixer is arranged in the coagulation tank, and a first dosing pipe is arranged on one side of the coagulation tank and used for adding a PAC (poly aluminum chloride) medicament into the coagulation tank;
the flocculation tank is arranged in the third tank body, a flocculation stirrer is arranged in the flocculation tank on at least one side of the coagulation tank along a first direction, a second dosing pipe is arranged on one side of the flocculation tank and used for heating a PAM (polyacrylamide) medicament in the flocculation tank, the flocculation tank is communicated with the coagulation tank at a position close to the bottom, and the first direction is a horizontal direction;
the water distribution tank is arranged on one side of the coagulation tank along a second direction, the second direction is a horizontal direction perpendicular to the first direction, the water distribution tank extends along the first direction, and a first water passing hole is formed in a position on a test on the common side wall of the flocculation tank and the water distribution tank;
the first sedimentation tank is arranged on one side of the water distribution tank opposite to the two coagulation tanks, the depth of the first sedimentation tank is greater than that of the water distribution tank, the tank bottom of the water distribution tank is communicated with the first sedimentation tank, inclined plate filler is arranged in the first sedimentation tank, and the highest position of the inclined plate filler is not lower than the bottom of a baffle of the water distribution tank;
the mud scraper is arranged in the first sedimentation tank, and a mud scraping mechanism of the mud scraper is positioned at the bottom of the first sedimentation tank;
the sludge return pipe is arranged at the bottom of the first sedimentation tank and is positioned below the mud scraping mechanism, one end of the sludge return pipe extends to the outer side of the third tank body, and one end of the sludge return pipe extending to the outer side of the third tank body is connected with a sludge return pump;
the water outlet weirs are arranged in the first sedimentation tank and are positioned above the inclined plate filters, the plurality of water outlet weirs are arranged along the first direction, each water outlet weir extends along the second direction, and the height of each water outlet weir is lower than that of the first water passing hole;
the water collecting weir is arranged on one side, away from the water distribution tank, of the water outlet weir, an opening at the upper end of the water collecting weir is lower than the bottom of the water outlet weir, and water in the water outlet weir automatically flows into the water collecting weir;
the first filtering ponds have two, set up the weir that catchments with the opposite one side of first sedimentation tank has set gradually third packing layer, third supporting layer, third filter plate from the top down in every first filtering pond be provided with the third filter head on the third filter plate, the third filter plate with have the third clearance between the bottom of the pool of first filtering pond, a plurality of third clearances and same outlet pipe intercommunication.
10. The deep treatment method of the Maotai-flavor liquor wastewater in the seed-bundling liquor brewing process is characterized by comprising the following steps of:
step one, performing denitrification treatment on wastewater;
step two, adding a carbon source into the wastewater obtained in the step one for carbonization treatment;
step three, introducing ozone into the wastewater obtained in the step two for oxidation and decoloration treatment;
and step four, sequentially carrying out coagulation, flocculation, precipitation and filtration treatment on the wastewater obtained in the step four.
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