CN211111592U - Cellulosic ethanol wastewater treatment system - Google Patents
Cellulosic ethanol wastewater treatment system Download PDFInfo
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- CN211111592U CN211111592U CN201921864903.9U CN201921864903U CN211111592U CN 211111592 U CN211111592 U CN 211111592U CN 201921864903 U CN201921864903 U CN 201921864903U CN 211111592 U CN211111592 U CN 211111592U
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Abstract
The utility model discloses a cellulose ethanol effluent disposal system, including first equalizing basin, senior oxidation pond (1), second equalizing basin, ozone air supporting pond (2), anaerobism pond (3), good oxygen pond (4) and the sedimentation tank that communicates in proper order. The utility model discloses can effectively handle the cellulose ethanol waste water that organic concentration is high, B/C is low, have that the treatment effect is good, advantages such as system operation is stable.
Description
Technical Field
The utility model relates to a waste water treatment technical field, concretely relates to cellulosic ethanol effluent disposal system.
Background
At present, the method for producing the cellulosic ethanol adopted at home and abroad is mainly to pretreat lignocellulose such as bagasse, wheat, corn straw and the like by a series of physical and chemical methods, then carry out hydrolytic saccharification process under the action of cellulase, and finally carry out fermentation, distillation, dehydration and the like to prepare the cellulosic ethanol. During the pretreatment process, lignin and partial hemicellulose in the cellulose raw material can not be completely degraded and utilized, and some non-degradable byproducts such as aromatic aldehyde, phenols and the like are generated, and the substances can not be degraded and utilized by microorganisms such as yeast and the like in the subsequent ethanol production process, and finally become a part of the cellulose ethanol wastewater through steps such as distillation and dehydration.
The cellulosic ethanol wastewater is characterized by (1) high organic matter concentration, high Chemical Oxygen Demand (COD) and five-day biochemical oxygen demand (BOD 5) concentrations of the wastewater, high COD of about 25000 mg/L, high BOD5 of about 5000 mg/L, (2) poor biodegradability, and high B/C of the wastewater of about 0.2. the cellulosic ethanol production process generates a plurality of refractory aromatic compounds, increases the difficulty of wastewater treatment, (3) low pH value of the wastewater, the pH value of the wastewater is about 3.7, the cellulosic ethanol production process usually adopts acid for hydrolysis, and a large amount of acidic substances are generated in the process, the existence of the substances enables the pH value of the cellulosic ethanol wastewater to be low, (4) high chromaticity, the chromaticity of the wastewater is 2000 times, and the cellulosic ethanol production process has irritant odor.
At present, the treatment of cellulosic ethanol wastewater mainly adopts an anaerobic and aerobic biological treatment process, but has the conditions of higher operation cost, unstable system operation and the like, so that a plurality of production enterprises face the problems of difficult standard reaching of wastewater treatment, high treatment energy consumption and the like. Therefore, a high-efficiency and low-consumption cellulosic ethanol wastewater treatment technology and process are needed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model aims to provide a cellulose ethanol wastewater treatment system.
In order to achieve the aim, the cellulose ethanol wastewater treatment system comprises a first adjusting tank, an advanced oxidation tank (1), a second adjusting tank, an ozone floatation tank (2), an anaerobic tank (3), an aerobic tank (4) and a sedimentation tank which are sequentially communicated;
the advanced oxidation pond (1) comprises a mixing area (1-1) and a separation area (1-2), wherein the bottom of the mixing area is provided with an advanced oxidation pond water inlet pipe (1-3), and the advanced oxidation pond water inlet pipe (1-3) is communicated with a first regulating pond water outlet pipe; a liquid medicine adding meter (1-4) for adding hydrogen peroxide and ferrous salt is arranged at the middle upper part of the mixing zone, and an advanced oxidation pond stirrer (1-5) is arranged at the middle lower part of the mixing zone; the separation area is internally provided with a clapboard (1-6), the clapboard and the inner wall of the advanced oxidation pond form a wastewater channel which is used for wastewater to enter the separation area, the outlet of the separation area is provided with an advanced oxidation pond three-phase separator (1-7), the separation area is provided with an advanced oxidation pond overflow weir (1-8), and the advanced oxidation pond overflow weir (1-8) is communicated with a water outlet pipe of the advanced oxidation pond; the bottom of the separation area is provided with a high-grade oxidation pond sediment discharge valve (1-9).
Furthermore, the bottom of the separation zone is designed into a conical structure, and the lower part of the conical structure is provided with a high-grade oxidation pond sediment discharge valve (1-9); the upper part of the advanced oxidation pond is provided with a conical upper cover, the top of the conical upper cover of the advanced oxidation pond is provided with an advanced oxidation pond gas collecting pipe (1-10), and the advanced oxidation pond gas collecting pipe (1-10) is communicated with an advanced oxidation pond gas collecting pump (1-11).
Further, an ozone aeration disc (2-1) is arranged at the bottom of the ozone air-flotation tank (2), an ozone air-flotation tank water distribution pipe (2-2) is arranged above the ozone aeration disc, the ozone air-flotation tank water distribution pipe is connected with an ozone air-flotation tank water inlet pipe (2-3), and the ozone air-flotation tank water inlet pipe (2-3) is communicated with a second adjusting tank water outlet pipe; the ozone aeration disc (2-1) is connected with an ozone fan (2-4) outside the ozone floatation tank through a pipeline, and the ozone fan (2-4) is communicated with an ozone generator (2-5) through a pipeline; an overflow weir (2-6) of the ozone floatation tank is arranged at the upper part of the outlet of the ozone floatation tank, and the overflow weir (2-6) of the ozone floatation tank is communicated with a water outlet pipe of the ozone floatation tank.
Furthermore, a conical upper cover is arranged at the upper part of the ozone floatation tank, an ozone floatation tank gas collecting pipe (2-7) is arranged at the top of the conical upper cover, and the ozone floatation tank gas collecting pipe (2-7) is communicated with an ozone floatation tank gas collecting pump (2-8).
Furthermore, the anaerobic tank (3) comprises a facultative section (3-2), an anoxic section (3-3) and an anaerobic section (3-4) which are separated by a baffle plate (3-1), the head end of the facultative section (3-2) is provided with an anaerobic tank water inlet pipe (3-5) for feeding wastewater, and the anaerobic tank water inlet pipe (3-5) is communicated with an ozone floatation tank water outlet pipe; the tail end of the facultative section (3-2) is communicated with the head end of the anoxic section (3-3), and the tail end of the anoxic section (3-3) is communicated with the head end of the anaerobic section (3-4); the lower parts of the baffle plates on the water inlet sides of the anoxic section (3-3) and the anaerobic section (3-4) are provided with 45-degree corners, the tail end of the anaerobic section (3-4) is provided with an anaerobic tank three-phase separator (3-6) and an anaerobic tank overflow weir (3-7), and the anaerobic tank overflow weir (3-7) is connected with an anaerobic tank water outlet pipe; anaerobic tank fillers (3-11) are arranged in the facultative section, the anoxic section and the anaerobic section.
Furthermore, the bottoms of the facultative section (3-2), the anoxic section (3-3) and the anaerobic section (3-4) are designed into a conical structure, and the conical structure is connected with a sludge discharge valve (3-8) of the anaerobic tank; the facultative section, the anoxic section and the anaerobic section of the anaerobic tank are provided with upper covers (3-9), the upper covers (3-9) of the anaerobic tank are designed into conical structures, and methane collecting pipes (3-10) are arranged at the top ends of the conical structures.
Furthermore, an aerobic tank water inlet pipe (4-1) is arranged at the middle lower part in the aerobic tank (4), and the aerobic tank water inlet pipe (4-1) is communicated with an anaerobic tank water outlet pipe; a water distribution triangular cone (4-2) is arranged at the lower part of the water inlet pipe (4-1) of the aerobic tank; the lower part of the water distribution triangular cone (4-2) is provided with an aerobic tank aeration regulator (4-3), and the aerobic tank aeration regulator (4-3) comprises an aerobic tank aeration disc, an aerobic tank blower and a dissolved oxygen measurement regulation device.
Furthermore, the aeration disc of the aerobic tank is a microporous aeration disc which is uniformly provided with micropores; the aeration disc of the aerobic tank is connected with an air blower of the aerobic tank through an aeration pipe, and the air blower of the aerobic tank is arranged outside the aerobic tank; an oxygen measurement and regulation system is arranged at the upper part of the aerobic tank and below the water surface of the wastewater, and regulates and controls the operation of an air blower of the aerobic tank according to the oxygen content in the wastewater; an aerobic tank filler (4-4) is arranged in the upper part of the aerobic tank water inlet pipe (4-1); the bottom of the aerobic tank is provided with an aerobic tank sludge discharge valve (4-5), the outlet of the aerobic tank is provided with an aerobic tank overflow weir (4-6), and the aerobic tank overflow weir (4-6) is connected with an aerobic tank water outlet pipe; the upper part of the aerobic tank is provided with a conical upper cover, the top of the conical upper cover of the aerobic tank is provided with an aerobic tank gas collecting pipe (4-7), and the aerobic tank gas collecting pipe is communicated with an aerobic tank gas collecting pump (4-8).
In order to achieve the purpose, the utility model discloses above-mentioned system is to cellulosic ethanol waste water treatment's technology, and concrete step is as follows:
①, the cellulosic ethanol wastewater enters a first regulating reservoir to regulate the water quality, water quantity and pH value of the cellulosic ethanol wastewater;
② the waste water enters the advanced oxidation pond through the first adjusting pond water outlet pipe and the advanced oxidation pond water inlet pipe, mixes with the hydrogen peroxide and ferrous salt from the liquid medicine adding meter, and uses the advanced oxidation pond stirrer to stir, the hydrogen peroxide reacts with the ferrous salt to generate a large amount of active hydroxyl free radicals, the pollutants in the waste water are oxidized and decomposed, the oxidized and decomposed waste water enters the separation zone, the advanced oxidation pond three-phase separator realizes solid-liquid separation, the solid sinks to the lower part of the separation zone under the action of gravity, and is discharged through the advanced oxidation pond sediment discharge valve at the bottom, the waste water enters the second adjusting pond water inlet pipe through the advanced oxidation pond overflow weir and the advanced oxidation pond water outlet pipe;
③ the wastewater enters a second regulating reservoir through a water inlet pipe of the second regulating reservoir to regulate the pH value of the cellulosic ethanol wastewater;
④ the adjusted wastewater enters an ozone floatation tank through an ozone floatation tank water inlet pipe, an ozone aeration disc generates a large amount of fine bubbles to oxidize macromolecular pollutants in the wastewater into small molecular substances easy to absorb and adsorb, and the wastewater after oxidative decomposition enters an anaerobic tank water inlet pipe through an ozone floatation tank overflow weir and an ozone floatation tank water outlet pipe;
⑤ the waste water enters the lower part of the anaerobic tank through the inlet pipe of the anaerobic tank, the waste water enters the anaerobic tank and then goes up and down along the baffle plate, and passes through the sludge bed of each reaction chamber of the facultative section, the anoxic section and the anaerobic section in turn, the sludge in the reaction tank moves along with the up-and-down flow of the waste water and the rising action of the methane, the baffle plate stops and the sedimentation action of the sludge reduces the flow velocity of the sludge, so that the sludge is trapped in the reaction tank, the microorganisms in the reaction tank fully contact with the pollutants in the waste water;
⑥ the wastewater enters the middle lower part of the aerobic tank through the inlet pipe of the aerobic tank, the water is distributed evenly under the action of the triangular cone, the aeration disc of the aerobic tank generates a large amount of micro bubbles, the dissolved oxygen measurement and control device controls the blower of the aerobic tank to work, so that the oxygen content in the water in the aerobic tank is more than 2 mg/L;
⑦ the effluent of the aerobic tank enters into the sedimentation tank through the inlet pipe of the sedimentation tank, and the wastewater is discharged or recycled after reaching the standard after being precipitated by the sedimentation tank.
The utility model has the advantages that: the utility model discloses can effectively handle the cellulose ethanol waste water that organic concentration is high, B/C is low, have that the treatment effect is good, advantages such as system operation is stable.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram of an advanced oxidation pond according to an embodiment of the present invention.
In fig. 1: 1. the device comprises an advanced oxidation pond, a 1-1 mixing zone, a 1-2 separation zone, a 1-3 advanced oxidation pond water inlet pipe, a 1-4 liquid medicine adding meter, a 1-5 advanced oxidation pond stirrer, a 1-6 partition plate, a 1-7 advanced oxidation pond three-phase separator, a 1-8 advanced oxidation pond overflow weir, a 1-9 advanced oxidation pond sediment discharge valve, a 1-10 advanced oxidation pond gas collecting pipe and a 1-11 advanced oxidation pond gas collecting pump.
Fig. 2 is a schematic structural diagram of an ozone floatation tank according to an embodiment of the present invention.
In fig. 2: 2. the system comprises an ozone air floatation tank, 2-1 parts of an ozone aeration disc, 2-2 parts of a water distribution pipe of the ozone air floatation tank, 2-3 parts of a water inlet pipe of the ozone air floatation tank, 2-4 parts of an ozone fan, 2-5 parts of an ozone generator, 2-6 parts of an overflow weir of the ozone air floatation tank, 2-7 parts of a gas collection pipe of the ozone air floatation tank and 2-8 parts of a gas collection pump of the ozone air floatation tank.
Fig. 3 is a schematic structural diagram of an anaerobic pool according to an embodiment of the present invention.
In fig. 3: 3. the anaerobic tank comprises an anaerobic tank, 3-1 parts of a baffle plate, 3-2 parts of an facultative section, 3-3 parts of an anoxic section, 3-4 parts of an anaerobic section, 3-5 parts of an anaerobic tank water inlet pipe, 3-6 parts of an anaerobic tank three-phase separator, 3-7 parts of an anaerobic tank overflow weir, 3-8 parts of an anaerobic tank sludge discharge valve, 3-9 parts of an anaerobic tank upper cover, 3-10 parts of a methane gas collecting pipe and 3-11 parts of anaerobic tank filler.
Fig. 4 is a schematic structural view of an aerobic tank according to an embodiment of the present invention.
In fig. 4: 4. the device comprises an aerobic tank, 4-1 parts of an aerobic tank water inlet pipe, 4-2 parts of a water distribution triangular cone, 4-3 parts of an aerobic tank aeration regulator, 4-4 parts of an aerobic tank filler, 4-5 parts of an aerobic tank sludge discharge valve, 4-6 parts of an aerobic tank overflow weir, 4-7 parts of an aerobic tank gas collecting pipe and 4-8 parts of an aerobic tank gas collecting pump.
Fig. 5 is a process flow diagram of an embodiment of the invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Examples
As shown in figures 1-5, the utility model discloses a cellulosic ethanol wastewater treatment system, including first equalizing basin, senior oxidation pond 1, second equalizing basin, ozone air supporting pond 2, anaerobism pond 3, good oxygen pond 4 and sedimentation tank, first equalizing basin, senior oxidation pond 1, second equalizing basin, ozone air supporting pond 2, anaerobism pond 3, good oxygen pond 4 and sedimentation tank communicate in proper order.
The first adjusting tank comprises a first adjusting tank water inlet pipe and a first adjusting tank water outlet pipe and is used for adjusting the water quality, the water quantity and the pH value of the cellulosic ethanol wastewater. The first regulating tank is provided with an upper cover which is a closed structure and prevents odor from leaking.
The advanced oxidation pond 1 comprises a mixing zone 1-1 and a separation zone 1-2, the bottom of the mixing zone is provided with an advanced oxidation pond water inlet pipe 1-3, and the advanced oxidation pond water inlet pipe 1-3 is communicated with a first regulating pond water outlet pipe; a liquid medicine adding meter 1-4 for adding hydrogen peroxide and ferrous salt is arranged at the middle upper part of the mixing zone, and an advanced oxidation pond stirrer 1-5 is arranged at the middle lower part of the mixing zone; the separation area is internally provided with a clapboard 1-6, the clapboard and the inner wall of the advanced oxidation pond form a wastewater channel which is used for wastewater to enter the separation area, the outlet of the separation area is provided with an advanced oxidation pond three-phase separator 1-7, the upper part of the outlet of the separation area is provided with an advanced oxidation pond overflow weir 1-8, and the advanced oxidation pond overflow weir 1-8 is communicated with the water outlet pipe of the advanced oxidation pond; the bottom of the separation zone is designed into a conical structure, and the lower part of the conical structure is provided with a high-grade oxidation pond sediment discharge valve 1-9. The upper part of the advanced oxidation pond is provided with a conical upper cover, the top of the conical upper cover of the advanced oxidation pond is provided with a gas collecting pipe 1-10 of the advanced oxidation pond, and the gas collecting pipe 1-10 of the advanced oxidation pond is communicated with a gas collecting pump 1-11 of the advanced oxidation pond.
The second regulating reservoir comprises a second regulating reservoir water inlet pipe, a pH value measuring and controlling device and a second regulating reservoir water outlet pipe and is used for regulating the pH value of the cellulosic ethanol wastewater. The water inlet pipe of the second adjusting tank is communicated with the water outlet pipe of the advanced oxidation tank. The second regulating tank is provided with an upper cover which is of a closed structure and prevents odor from leaking.
The bottom of the ozone air-flotation tank 2 is provided with an ozone aeration disc 2-1, a water distribution pipe 2-2 of the ozone air-flotation tank is arranged above the ozone aeration disc, the water distribution pipe of the ozone air-flotation tank is connected with a water inlet pipe 2-3 of the ozone air-flotation tank, and the water inlet pipe 2-3 of the ozone air-flotation tank is communicated with a water outlet pipe of a second adjusting tank; the ozone aeration disc 2-1 is connected with an ozone fan 2-4 outside the ozone floatation tank through a pipeline, and the ozone fan 2-4 is communicated with an ozone generator 2-5 through a pipeline; the upper part of the outlet of the ozone air floatation tank is provided with an overflow weir 2-6 of the ozone air floatation tank, and the overflow weir 2-6 of the ozone air floatation tank is communicated with a water outlet pipe of the ozone air floatation tank; the upper part of the ozone floatation tank is provided with a conical upper cover, the top of the conical upper cover is provided with an ozone floatation tank gas collecting pipe 2-7, and the ozone floatation tank gas collecting pipe 2-7 is communicated with an ozone floatation tank gas collecting pump 2-8.
The anaerobic tank 3 comprises a facultative section 3-2, an anoxic section 3-3 and an anaerobic section 3-4 which are separated by a baffle plate 3-1, the head end of the facultative section 3-2 is provided with an anaerobic tank water inlet pipe 3-5 for feeding waste water, and the anaerobic tank water inlet pipe 3-5 is communicated with an ozone floatation tank water outlet pipe; the tail end of the facultative section 3-2 is communicated with the head end of the anoxic section 3-3, the tail end of the anoxic section 3-3 is communicated with the head end of the anaerobic section 3-4, and the lower parts of the baffle plates at the water inlet sides of the anoxic section 3-3 and the anaerobic section 3-4 are provided with 45-degree corners so as to avoid impact generated when water flows enter, thereby playing roles in buffering the water flows and uniformly distributing the water; the tail end of the anaerobic section 3-4 is provided with an anaerobic tank three-phase separator 3-6 and an anaerobic tank overflow weir 3-7, and the anaerobic tank overflow weir 3-7 is connected with an anaerobic tank water outlet pipe; the bottoms of the facultative section 3-2, the anoxic section 3-3 and the anaerobic section 3-4 are designed into a conical structure, and the conical structure is connected with an anaerobic tank sludge discharge valve 3-8; the upper covers 3-9 of the facultative section, the anoxic section and the anaerobic section of the anaerobic tank are designed into conical structures, and the top ends of the conical structures are provided with methane gas collecting pipes 3-10; anaerobic tank fillers 3-11 are arranged in the facultative section, the anoxic section and the anaerobic section.
The middle lower part in the aerobic tank 4 is provided with an aerobic tank water inlet pipe 4-1, and the aerobic tank water inlet pipe 4-1 is communicated with an anaerobic tank water outlet pipe; the lower part of the water inlet pipe 4-1 of the aerobic tank is provided with a water distribution triangular cone 4-2; the lower part of the water distribution triangular cone 4-2 is provided with an aerobic tank aeration regulator 4-3, and the aerobic tank aeration regulator 4-3 comprises an aerobic tank aeration disc, an aerobic tank blower and a dissolved oxygen measurement regulation device; furthermore, the aeration disc of the aerobic tank is a microporous aeration disc which is uniformly provided with micropores. The aeration disc of the aerobic tank is connected with an air blower of the aerobic tank through an aeration pipe, and the air blower of the aerobic tank is arranged outside the aerobic tank; an oxygen measurement and regulation system is arranged at the upper part of the aerobic tank and below the wastewater surface, and the oxygen measurement and regulation system regulates and controls the work of an air blower according to the oxygen content; an aerobic tank filler 4-4 is arranged in the upper part of the aerobic tank water inlet pipe 4-1; the bottom of the aerobic tank is provided with an aerobic tank sludge discharge valve 4-5, the outlet of the aerobic tank is provided with an aerobic tank overflow weir 4-6, and the aerobic tank overflow weir 4-6 is connected with an aerobic tank water outlet pipe. The upper part of the aerobic tank is provided with a conical upper cover, the top of the conical upper cover of the aerobic tank is provided with an aerobic tank gas collecting pipe 4-7, and the aerobic tank gas collecting pipe is communicated with an aerobic tank gas collecting pump 4-8.
The water outlet pipe of the aerobic tank is connected with the water inlet pipe of the sedimentation tank, and the wastewater is discharged or recycled after reaching the standard after being precipitated by the sedimentation tank.
The utility model discloses above-mentioned system is to cellulosic ethanol waste water treatment process, and concrete step is as follows:
① the cellulosic ethanol wastewater enters a first regulating reservoir through a first regulating reservoir water inlet pipe to regulate the water quality, water quantity and pH value of the cellulosic ethanol wastewater.
② the waste water enters the advanced oxidation pond 1 through the first adjusting pond outlet pipe and the advanced oxidation pond inlet pipe 1-3, and mixes with the hydrogen peroxide and ferrous salt from the liquid medicine adding meter 1-4, and uses the advanced oxidation pond stirrer 1-5 to stir, the hydrogen peroxide reacts with the ferrous salt to generate a large amount of active hydroxyl free radical, the pollutant in the waste water is oxidized and decomposed, the waste water after oxidation and decomposition enters the separation zone 1-2, the advanced oxidation pond three-phase separator 1-7 realizes solid-liquid separation, the solid sinks to the lower part of the separation zone under the action of gravity, and is discharged through the advanced oxidation pond sediment discharge valve 1-9 at the bottom, the waste water enters the second adjusting pond through the advanced oxidation pond overflow weir 1-8 and the advanced oxidation pond outlet pipe, the odor escaping from the water surface enters the waste gas treatment system through the advanced oxidation pond gas collecting pipe 1-10 and the advanced oxidation pond gas collecting pump 1-11.
③ the cellulosic ethanol wastewater enters a second regulating reservoir through a water inlet pipe of the second regulating reservoir, and the pH value of the cellulosic ethanol wastewater is regulated to be neutral.
④ the regulated waste water enters the ozone air-float pool 2 through the water inlet pipe 2-3 of the ozone air-float pool, the water distribution pipe 2-2 of the ozone air-float pool distributes water evenly, the ozone aeration disc 2-1 generates a large amount of tiny bubbles to oxidize the macromolecule pollutant in the waste water into small molecule substance which is easy to absorb and adsorb, the waste water after oxidative decomposition enters the water inlet pipe of the anaerobic pool through the overflow weir 2-6 of the ozone air-float pool and the water outlet pipe of the ozone air-float pool, the odor in the waste water is blown out of the water surface, and enters the waste gas treatment system under the action of the gas collection pump 2-8 of the ozone air-float pool through the gas collection pipe 2-7 of the ozone air-.
⑤ the waste water enters the lower part of the anaerobic tank through the inlet pipe 3-5 of the anaerobic tank, the waste water enters the anaerobic tank and moves up and down along the baffle plate, and passes through the sludge bed of each reaction chamber of the facultative section 3-2, the anoxic section 3-3 and the anaerobic section 3-4, the sludge in the reaction tank moves along with the up and down flow of the waste water and the rising action of the methane, the baffle plate stops the sludge and the sedimentation action of the sludge per se reduce the flow velocity of the sludge, therefore, a large amount of sludge is retained in the reaction tank, the microorganisms in the reaction tank fully contact with the pollutants in the waste water, the facultative bacteria of the facultative section 3-2, the anoxic section 3-3 and the heterotrophic bacteria of the anaerobic section 3-4 decompose the macromolecular pollutants in the waste water into small molecular pollutants, and the insoluble pollutants are converted into soluble pollutants, the waste water after anaerobic reaction realizes the separation of sludge, water and methane gas under the action of the three-phase separator 3-6 of the anaerobic tank, the sludge sinks to the lower part of the anaerobic section under the action of gravity, the excess sludge is discharged through the sludge discharge valve 3-8 of the anaerobic tank, and enters the anaerobic effluent pipe 3-10 of the anaerobic tank, and the methane gas collection pipe 1-.
⑥ the waste water enters the middle lower part of the aerobic tank through the inlet pipe 4-1 of the aerobic tank, the water is distributed evenly under the action of the triangular cone 4-2, the aeration disc of the aerobic tank generates a large amount of micro bubbles, the dissolved oxygen measurement and control device controls the blower of the aerobic tank to work to ensure that the oxygen content in the water in the aerobic tank is more than 2 mg/L, the activated sludge is attached to the surface of the filler 4-4 of the aerobic tank and is continuously updated due to the stirring of the biomembrane by the ascending air flow, under the condition of sufficient oxygen supply, the aerobic microorganisms on the surface of the filler 4-4 of the aerobic tank degrade the pollutants in the waste water, the updated biomembrane sinks to the lower part of the aerobic tank under the action of gravity and is discharged through the sludge discharge valve 4-5 of the aerobic tank at the bottom, the water after aerobic treatment is discharged through the overflow weir 4-6 of the aerobic tank and the outlet pipe of the aerobic tank, and the gas escaping from the water surface enters the waste gas treatment.
⑦ the effluent of the aerobic tank enters into the sedimentation tank through the inlet pipe of the sedimentation tank, and the wastewater is discharged or recycled after reaching the standard after being precipitated by the sedimentation tank.
⑧ the sediments or sludge produced in the advanced oxidation pond 1, the anaerobic pond 3, the aerobic pond 4 and the sedimentation pond are transported outside after dehydration.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a cellulosic ethanol effluent disposal system which characterized in that: comprises a first adjusting tank, an advanced oxidation tank (1), a second adjusting tank, an ozone floatation tank (2), an anaerobic tank (3), an aerobic tank (4) and a sedimentation tank which are communicated in sequence;
the advanced oxidation pond (1) comprises a mixing area (1-1) and a separation area (1-2), wherein the bottom of the mixing area is provided with an advanced oxidation pond water inlet pipe (1-3), and the advanced oxidation pond water inlet pipe (1-3) is communicated with a first regulating pond water outlet pipe; a liquid medicine adding meter (1-4) for adding hydrogen peroxide and ferrous salt is arranged at the middle upper part of the mixing zone, and an advanced oxidation pond stirrer (1-5) is arranged at the middle lower part of the mixing zone; the separation area is internally provided with a clapboard (1-6), the clapboard and the inner wall of the advanced oxidation pond form a wastewater channel which is used for wastewater to enter the separation area, the outlet of the separation area is provided with an advanced oxidation pond three-phase separator (1-7), the separation area is provided with an advanced oxidation pond overflow weir (1-8), and the advanced oxidation pond overflow weir (1-8) is communicated with a water outlet pipe of the advanced oxidation pond; the bottom of the separation area is provided with a high-grade oxidation pond sediment discharge valve (1-9).
2. The cellulosic ethanol wastewater treatment system of claim 1, wherein: the bottom of the separation zone is designed into a conical structure, and the lower part of the conical structure is provided with a high-grade oxidation pond sediment discharge valve (1-9); the upper part of the advanced oxidation pond is provided with a conical upper cover, the top of the conical upper cover of the advanced oxidation pond is provided with an advanced oxidation pond gas collecting pipe (1-10), and the advanced oxidation pond gas collecting pipe (1-10) is communicated with an advanced oxidation pond gas collecting pump (1-11).
3. The cellulosic ethanol wastewater treatment system of claim 1, wherein: an ozone aeration disc (2-1) is arranged at the bottom of the ozone floatation tank (2), an ozone floatation tank water distribution pipe (2-2) is arranged above the ozone aeration disc, the ozone floatation tank water distribution pipe is connected with an ozone floatation tank water inlet pipe (2-3), and the ozone floatation tank water inlet pipe (2-3) is communicated with a second adjusting tank water outlet pipe; the ozone aeration disc (2-1) is connected with an ozone fan (2-4) outside the ozone floatation tank through a pipeline, and the ozone fan (2-4) is communicated with an ozone generator (2-5) through a pipeline; an overflow weir (2-6) of the ozone floatation tank is arranged at the upper part of the outlet of the ozone floatation tank, and the overflow weir (2-6) of the ozone floatation tank is communicated with a water outlet pipe of the ozone floatation tank.
4. The cellulosic ethanol wastewater treatment system of claim 3, wherein: the upper part of the ozone floatation tank is provided with a conical upper cover, the top of the conical upper cover is provided with an ozone floatation tank gas collecting pipe (2-7), and the ozone floatation tank gas collecting pipe (2-7) is communicated with an ozone floatation tank gas collecting pump (2-8).
5. The cellulosic ethanol wastewater treatment system of claim 1, wherein: the anaerobic tank (3) comprises a facultative section (3-2), an anoxic section (3-3) and an anaerobic section (3-4) which are separated by a baffle plate (3-1), the head end of the facultative section (3-2) is provided with an anaerobic tank water inlet pipe (3-5) for feeding wastewater, and the anaerobic tank water inlet pipe (3-5) is communicated with an ozone floatation tank water outlet pipe; the tail end of the facultative section (3-2) is communicated with the head end of the anoxic section (3-3), and the tail end of the anoxic section (3-3) is communicated with the head end of the anaerobic section (3-4); the lower parts of the baffle plates on the water inlet sides of the anoxic section (3-3) and the anaerobic section (3-4) are provided with 45-degree corners, the tail end of the anaerobic section (3-4) is provided with an anaerobic tank three-phase separator (3-6) and an anaerobic tank overflow weir (3-7), and the anaerobic tank overflow weir (3-7) is connected with an anaerobic tank water outlet pipe; anaerobic tank fillers (3-11) are arranged in the facultative section, the anoxic section and the anaerobic section.
6. The cellulosic ethanol wastewater treatment system of claim 5, wherein: the bottoms of the facultative section (3-2), the anoxic section (3-3) and the anaerobic section (3-4) are designed into a conical structure, and the conical structure is connected with an anaerobic tank sludge discharge valve (3-8); the facultative section, the anoxic section and the anaerobic section of the anaerobic tank are provided with upper covers (3-9), the upper covers (3-9) of the anaerobic tank are designed into conical structures, and methane collecting pipes (3-10) are arranged at the top ends of the conical structures.
7. The cellulosic ethanol wastewater treatment system of claim 1, wherein: an aerobic tank water inlet pipe (4-1) is arranged at the middle lower part in the aerobic tank (4), and the aerobic tank water inlet pipe (4-1) is communicated with an anaerobic tank water outlet pipe; a water distribution triangular cone (4-2) is arranged at the lower part of the water inlet pipe (4-1) of the aerobic tank; the lower part of the water distribution triangular cone (4-2) is provided with an aerobic tank aeration regulator (4-3), and the aerobic tank aeration regulator (4-3) comprises an aerobic tank aeration disc, an aerobic tank blower and a dissolved oxygen measurement regulation device.
8. The cellulosic ethanol wastewater treatment system of claim 7, wherein: the aeration disc of the aerobic tank is a microporous aeration disc which is uniformly provided with micropores; the aeration disc of the aerobic tank is connected with an air blower of the aerobic tank through an aeration pipe, and the air blower of the aerobic tank is arranged outside the aerobic tank; an oxygen measurement and regulation system is arranged at the upper part of the aerobic tank and below the water surface of the wastewater, and regulates and controls the operation of an air blower of the aerobic tank according to the oxygen content in the wastewater; an aerobic tank filler (4-4) is arranged in the upper part of the aerobic tank water inlet pipe (4-1); the bottom of the aerobic tank is provided with an aerobic tank sludge discharge valve (4-5), the outlet of the aerobic tank is provided with an aerobic tank overflow weir (4-6), and the aerobic tank overflow weir (4-6) is connected with an aerobic tank water outlet pipe; the upper part of the aerobic tank is provided with a conical upper cover, the top of the conical upper cover of the aerobic tank is provided with an aerobic tank gas collecting pipe (4-7), and the aerobic tank gas collecting pipe is communicated with an aerobic tank gas collecting pump.
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