CN116332415A - Sewage treatment system and sewage treatment process - Google Patents

Abstract

The invention discloses a sewage treatment system which is applied to a brewing workshop, wherein a gas steam boiler is arranged in the brewing workshop, the gas steam boiler is connected with a steamer, and the steamer is provided with a condenser. The invention discloses a sewage treatment process, which comprises the sewage treatment system. The sewage treatment system and the sewage treatment process disclosed by the invention have the advantages that the biogas yield is obviously improved while the acidolysis neutralization of caustic soda flakes is not needed, the energy is fully utilized, and the economic benefit is great.

Description

Sewage treatment system and sewage treatment process

Technical Field

The invention belongs to the technical field of sewage treatment, and particularly relates to a sewage treatment system and a sewage treatment process.

Background

Sewage treatment is a process of purifying sewage to meet the water quality requirement of being discharged into a certain water body or reused. The sewage treatment is widely applied to various fields such as buildings, agriculture, traffic, energy, petrifaction, environmental protection, urban landscapes, medical treatment, catering and the like. Methods for treating sewage can be generally classified into physical methods, chemical methods, biological methods, and the like. The UASB (anaerobic) +SBR (aerobic) combined sewage treatment mode is widely applied, and caustic soda flakes are generally added for hydrolysis and neutralization pretreatment before UASB (anaerobic) treatment, so that the sewage treatment cost is increased, the methane conversion amount is low, and the resources are not fully utilized.

Disclosure of Invention

In order to solve the problems, the invention provides a sewage treatment system and a sewage treatment process, which do not need to add caustic soda acid hydrolysis for neutralization, and meanwhile, the biogas yield is obviously improved, the energy is fully utilized, and the sewage treatment system and the sewage treatment process have great economic benefits.

The embodiment of the invention is realized by the following technical scheme:

the utility model provides a sewage treatment system, is applied to the making wine workshop, is provided with gas steam boiler in this making wine workshop, and gas steam boiler connects the steamer, the steamer is provided with the condenser, including collecting vat, hydrolysis neutralization pond, allotment pond, anaerobic tank, aeration tank, biochemical sedimentation tank and the biological detection pond that connects gradually, the anaerobic tank is provided with the three-phase separator, and the three-phase separator is connected with the gas holder, the allotment pond is provided with the temperature adjustment mechanism that is used for adjusting sewage temperature, the anaerobic tank is provided with the back flow, this back flow connection allotment pond.

Two three-phase separators are arranged in the anaerobic tank.

The water temperature adjusting mechanism comprises a water temperature detecting unit, a temperature adjusting unit and a control unit, wherein the water temperature detecting unit comprises a plurality of temperature sensors, the temperature sensors are arranged in the anaerobic tank, the temperature adjusting unit is used for adjusting and controlling the temperature in the blending pool, and the water temperature detecting unit and the temperature adjusting unit are respectively connected with the control unit.

The temperature regulating unit comprises a hot water storage tank, the hot water storage tank is connected with a condenser and used for storing cooling water after heat exchange of the condenser, the hot water storage tank is provided with a connecting pipe, the connecting pipe is connected to the blending pool, the connecting pipe is provided with a water pump, and the water pump is connected with the control unit.

The temperature regulating unit comprises a water heater and a hot water pipe, the air storage tank is connected with the water heater and used for providing the combustion energy of the water heater, one end of the hot water pipe is connected with the water heater, the other end of the hot water pipe is connected with the blending pool, and the water heater is provided with an electric control switch which is connected with the control unit.

A wastewater treatment process comprising a wastewater treatment system, the wastewater treatment process comprising the steps of:

s1, discharging workshop sewage into a collecting tank for precipitation;

s2, conveying the precipitated workshop sewage to a hydrolysis neutralization tank, and discharging the sewage into a blending tank after hydrolysis acidification;

s3, regulating the temperature of the sewage in the blending pool to 20-32 ℃ and then transporting the sewage to an anaerobic tank;

s4, carrying out medium-temperature anaerobic fermentation on sewage in an anaerobic tank, digesting and degrading pollutants in the sewage to generate biogas, carrying out three-phase separation on gas, water and sludge through a three-phase separator to obtain biogas, treated water and sludge, storing the biogas in a gas storage tank, refluxing part of sludge to a hydrolysis neutralization tank, discharging the residual sludge for dehydration treatment, and discharging the treated water into an aeration tank;

s5, performing aerobic fermentation on the treated water in an aeration tank, further digesting and degrading pollutants in the treated water to obtain a cement mixture, and then discharging the cement mixture into a biochemical sedimentation tank;

s6, precipitating the cement mixture in a biochemical sedimentation tank to obtain purified water and precipitated sludge, discharging the precipitated sludge for dehydration treatment, and discharging the purified water into a biological detection tank;

s7, the biological detection pool detects indexes of the purified water, and the purified water is discharged into a river after the indexes reach the drainage standard.

In the step S7, if the water purification index does not reach the drainage standard, the purified water is returned to the blending pool.

In the step S3, the temperature sensor detects the temperature in the anaerobic tank and transmits temperature data to the control unit, and the control unit controls the temperature regulating unit to regulate the temperature of sewage in the blending tank.

The technical scheme of the embodiment of the invention has at least the following advantages and beneficial effects:

(1) According to the sewage treatment system provided by the invention, the sewage is pretreated, and the sewage temperature is regulated and controlled, so that the stability of the environment in the anaerobic tank is ensured, the existence of anaerobic microorganisms is easy, the activity of the anaerobic microorganisms in the anaerobic tank is improved, the biogas yield is stable and high, the resources are fully utilized, and the cost is saved.

(2) The sewage treatment process provided by the invention realizes acidolysis neutralization pretreatment of sewage by utilizing sewage backflow of the anaerobic tank, and has the advantages that the sewage temperature is regulated to be 20-32 ℃, the environment in the anaerobic tank is stable, the biogas improvement amount is obvious, and the economic benefit is higher

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of embodiment 2 of the present invention;

FIG. 3 is a schematic illustration of the middle process according to example 3 of the present invention.

Icon: 101-gas steam boiler, 102-steamer, 103-condenser, 01-collecting tank, 02-hydrolysis neutralization tank, 03-blending tank, 04-anaerobic tank, 041-return pipe, 05-aeration tank, 06-biochemical sedimentation tank, 07-biological detection tank, 08-three-phase separator, 09-air storage tank, 010-temperature sensor, 020-hot water storage tank, 021-water pump, 022-connecting pipe, 031-water heater, 032-hot water pipe.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, if the azimuth or positional relationship indicated by the terms "inner", "outer", etc. appears to be based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship that the inventive product is conventionally put in use, it is merely for convenience of describing the present invention and simplifying the description, and it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "configured," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

Example 1

Referring to fig. 1, the present embodiment provides a sewage treatment system, which is applied to a brewing workshop, wherein a gas steam boiler 101 is configured in the brewing workshop, the gas steam boiler 101 is connected with a steamer 102, steam generated by the gas steam boiler 101 is transmitted to the steamer 102 for steaming raw materials or distilled distillers' grains, the steamer 102 is configured with a condenser 103, and the steam generated during steaming or distillation is subjected to heat exchange by the condenser 103 to distill raw wine and generate cooling water; the sewage treatment system of the embodiment comprises a collecting tank 01, a hydrolysis neutralization tank 02, a blending tank 03, an anaerobic tank 04, an aeration tank 05, a biochemical sedimentation tank 06 and a biological detection tank 07 which are sequentially connected, wherein the anaerobic tank 04 is provided with a three-phase separator 08, the three-phase separator 08 is connected with a gas storage tank 09, the gas storage tank 09 can be used as internal combustion energy of a brewing workshop, such as the gas energy of a gas steam boiler 101, and can also be used for replacing or assisting natural gas in hot water in canteens and dormitories; the blending tank 03 is provided with a water temperature adjusting mechanism for adjusting the temperature of sewage, and the anaerobic tank 04 is provided with a return pipe 041, and the return pipe 041 is connected with the blending tank 03.

Through the arrangement, sewage generated in a brewing workshop is intensively discharged into the collecting tank 01 for sewage treatment, the sewage is discharged into the hydrolysis neutralization tank 02 for acidolysis neutralization pretreatment after being precipitated, then the sewage is pumped into the anaerobic tank 04 for anaerobic fermentation after being regulated by the regulating tank 03 to decompose pollutants, the sewage after being regulated by the temperature provides a proper living environment for anaerobic microorganisms, the anaerobic microorganisms improve the activity, further the biogas yield is improved, the biogas yield is obviously improved, the biogas is pressurized and stored by the air storage tank 09 and then is used as the combustion energy of the brewing workshop, the utilization of energy is realized, resources are saved, in addition, the sewage in the anaerobic tank 04 is returned to the hydrolysis neutralization tank 02 for pretreatment, and as the alkaline digestion effect of methane bacteria in the anaerobic tank 04 is realized, part of alkaline sludge is returned to the hydrolysis neutralization tank 02 for acidolysis neutralization pretreatment, no additional addition of caustic sheets are needed for neutralization, and the sewage treatment cost is saved, and the returned sludge contains a large amount of microorganisms, so that the sewage treatment effect in the anaerobic tank 04 is further improved; and finally, carrying out aerobic fermentation on the sewage treated by the anaerobic tank 04 in an aeration tank 05, further decomposing residual pollutants, depositing the sewage in a biochemical deposition tank 06, discharging the sewage in a biological detection tank 07 for storage, and discharging after the sewage reaches the discharge standard.

In this embodiment, two three-phase separators 08 are disposed in the anaerobic tank 04, and the two three-phase separators 08 are stacked on the upper portion of the anaerobic tank 04, so that the effect of separating gas, liquid and sludge in the anaerobic tank 04 is improved by using the two three-phase separators 08.

The embodiment further, temperature adjustment mechanism includes temperature detection element, temperature regulation unit and control unit, temperature detection element includes a plurality of temperature sensor 010, and a plurality of temperature sensor 010 dispose in anaerobic jar 04 in the bottom, temperature regulation unit is used for regulating and controlling the interior temperature of blending pond 03, temperature detection element and temperature regulation unit are connected with control unit respectively, specifically, control unit is the PLC controller, utilizes temperature sensor 010 to detect the temperature in the anaerobic jar 04 to carry out the adaptability to getting into the mud in the anaerobic jar 04 and adjust, thereby guaranteed anaerobic jar 04 internal environment's stability, provided good living environment for anaerobic microorganism, and then guaranteed the high-quantity and the stable production of marsh gas.

In this embodiment, the temperature adjusting unit further includes a hot water storage tank 020, the hot water storage tank 020 is configured with an insulation layer, the hot water storage tank 020 is connected to the condenser 103, after the steam generated in the use of the steamer 102 exchanges heat with the cooling water in the condenser 103, the cooling water is heated, and the heated cooling water is stored in the hot water storage tank 020, and it should be noted that the cooling water in the brewing workshop is usually tap water; the hot water storage tank 020 is provided with a connecting pipe 022, the connecting pipe 022 is connected to the blending pool 03, the connecting pipe 022 is provided with a water pump 021, and the water pump 021 is connected with a control unit, so that when the temperature of sewage in the blending pool 03 is regulated, the water pump 021 is utilized to convey the cooled water after heat exchange to the blending pool 03 to regulate the temperature, and resources are further fully utilized.

Example 2

Referring to fig. 2, this embodiment discloses a sewage treatment system, which has the same basic structure as the sewage treatment system described in embodiment 1, except that: the temperature adjusting units are different in structure; the temperature regulation unit of this embodiment includes water heater 031 and hot-water line 032, water heater 031 is connected to gas holder 09 for provide water heater 031 and fire the ability, water heater 031 is connected to the one end of hot-water line 032, and the other end and the allotment pond 03 of hot-water line 032 are connected, water heater 031 is furnished with automatically controlled switch, and this automatically controlled switch is connected with the control unit, and this embodiment utilizes water heater 031 to heat water, then utilizes hot water to regulate and control sewage in the regulation and control pond, and water heater 031 fires the ability and provides for the marsh gas that produces in the sewage treatment system, has also fully utilized the resource, has practiced thrift the energy.

Example 3

Referring to fig. 3, the present embodiment discloses a sewage treatment process, including the sewage treatment system described in embodiment 1 or embodiment 2, the sewage treatment process includes the following steps:

s1, draining workshop sewage into a collecting tank 01 for precipitation;

s2, conveying the precipitated workshop sewage to a hydrolysis neutralization pond 02, and discharging the sewage into a blending pond 03 after hydrolysis acidification;

s3, a temperature sensor 010 detects the temperature in the anaerobic tank 04 and transmits temperature data to a control unit, the control unit controls a temperature adjusting unit to adjust the temperature of sewage in the blending tank 03, specifically, in the sewage treatment system described in the embodiment 1, the control unit controls a water pump 021 to be turned on or off so that hot water is transmitted or stopped to be transmitted into the blending tank 03, the temperature of the sewage in the blending tank 03 is adjusted, the control unit is used for setting the temperature of the sewage to be adjusted, and the temperature of the sewage in the blending tank 03 is adjusted to 20-32 ℃ and then is transmitted to the anaerobic tank 04;

s4, carrying out medium-temperature anaerobic fermentation on sewage in an anaerobic tank 04, digesting and degrading pollutants in the sewage under the action of anaerobic microorganisms, generating methane under the digestion action of methane bacteria, carrying out gas, water and sludge three-phase separation on the decomposed sewage through a two-layer three-phase separator 08 to obtain methane, treated water and sludge, storing the methane in a gas storage tank 09, refluxing part of the sludge to a hydrolysis neutralization tank 02, discharging the residual sludge for dehydration treatment, and discharging the treated water into an aeration tank 05;

s5, performing aerobic fermentation on the treated water in an aeration tank 05, further digesting and degrading pollutants in the treated water to obtain a cement mixture, and then discharging the cement mixture into a biochemical sedimentation tank 06;

s6, precipitating the cement mixture in a biochemical sedimentation tank 06 to obtain purified water and precipitated sludge, discharging the precipitated sludge for dehydration treatment, and discharging the purified water into a biological detection tank 07;

s7, detecting indexes of the purified water by using the biological detection tank 07, and discharging the purified water into a river after the indexes reach the drainage standard; if the water purification index does not reach the drainage standard, the purified water is returned to the blending pool 03 for degradation treatment again, so that the water drainage index is guaranteed to be reached, and environmental pollution is avoided.

Experimental example 1

Experimental example 1A sewage treatment system as described in example 1 was used, 5 tons of sewage was introduced from a brewery to a collection tank 01, and the treatment was carried out according to the sewage treatment process in example 3, wherein the temperature of a blending tank 03 was controlled to about 25℃and after anaerobic fermentation in an anaerobic tank 04 and aerobic fermentation in an aeration tank 05, the amount of biogas collected was recorded after the index of water measured in a biological detection tank 07 reached the standard, as shown in Table a.

Experimental example 2

Experimental example 2 a sewage treatment system as described in example 2 was used, 5 tons of sewage was introduced from a brewery to a collection tank 01, and the treatment was performed according to the sewage treatment process in example 3, wherein the temperature of the blending tank 03 was controlled to about 25 °, after anaerobic fermentation in an anaerobic tank 04 and aerobic fermentation in an aeration tank 05, the amount of biogas collected was recorded after the index of water measured in a biological detection tank 07 reached the standard, as shown in table a.

Comparative example 1

Comparative example 1A sewage treatment system as described in example 1 was used, 5 tons of sewage was introduced from a brewery to a collection tank 01, and the treatment was carried out according to the sewage treatment process in example 3, wherein the temperature of a blending tank 03 was controlled to about 10℃and an anaerobic tank 04 stopped refluxing sludge to a hydrolysis neutralization tank 02, and the hydrolysis neutralization tank 02 was subjected to a pretreatment of hydrolysis neutralization of sewage by adding caustic soda flakes, and after anaerobic fermentation in the anaerobic tank 04 and aerobic fermentation in an aeration tank 05, the amount of biogas collected was recorded after the index measured in a biological detection tank 07 reached the standard, as shown in Table a.

Comparative example 2

Comparative example 1A sewage treatment system as described in example 1 was used, 5 tons of sewage was introduced from a brewery to a collection tank 01, and the treatment was carried out according to the sewage treatment process in example 3, wherein the temperature of a blending tank 03 was controlled at about 36℃and an anaerobic tank 04 stopped refluxing sludge to a hydrolysis neutralization tank 02, and the hydrolysis neutralization tank 02 was subjected to pretreatment of hydrolysis neutralization of sewage by adding caustic soda flakes, and after anaerobic fermentation in the anaerobic tank 04 and aerobic fermentation in an aeration tank 05, the amount of biogas collected was recorded after the index measured in a biological detection tank 07 reached the standard, as shown in Table a.

Table a

As can be seen from the table a, the sewage treatment system and the sewage treatment process provided by the invention have the advantages that the biogas yield is obviously improved, the use of caustic soda flakes is not needed, the sewage treatment cost is saved, and the economic benefit is great.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. The utility model provides a sewage treatment system, is applied to the making wine workshop, is provided with gas steam boiler in this making wine workshop, and gas steam boiler connects the steamer, the steamer is provided with the condenser, and its characterized in that includes collecting vat, hydrolysis neutralization pond, allotment pond, anaerobic jar, aeration tank, biochemical sedimentation tank and the biological detection pond that connect gradually, the anaerobic jar is provided with the three-phase separator, and the three-phase separator is connected with the gas holder, allotment pond is provided with the temperature adjustment mechanism that is used for adjusting sewage temperature, the anaerobic jar is provided with the back flow, and this back flow is connected allotment pond.

2. A sewage treatment system according to claim 1, wherein two three-phase separators are disposed in the anaerobic tank.

3. The sewage treatment system according to claim 1 or 2, wherein the water temperature adjusting mechanism comprises a water temperature detecting unit, a temperature adjusting unit and a control unit, the water temperature detecting unit comprises a plurality of temperature sensors, the temperature sensors are configured in the anaerobic tank, the temperature adjusting unit is used for adjusting and controlling the temperature in the blending tank, and the water temperature detecting unit and the temperature adjusting unit are respectively connected with the control unit.

4. A sewage treatment system according to claim 3, wherein the temperature regulating unit comprises a hot water storage tank connected to the condenser for storing the cooling water after heat exchange by the condenser, the hot water storage tank is provided with a connection pipe connected to the deployment tank, the connection pipe is provided with a water pump, and the water pump is connected to the control unit.

5. A sewage treatment system according to claim 3, wherein the temperature regulating unit comprises a water heater and a hot water pipe, the air storage tank is connected with the water heater for providing the water heater with fuel, one end of the hot water pipe is connected with the water heater, the other end of the hot water pipe is connected with the blending tank, and the water heater is provided with an electric control switch which is connected with the control unit.

6. A wastewater treatment process comprising the wastewater treatment system of claim 3, the wastewater treatment process comprising the steps of:

s1, discharging workshop sewage into a collecting tank for precipitation;

s2, conveying the precipitated workshop sewage to a hydrolysis neutralization tank, and discharging the sewage into a blending tank after hydrolysis acidification;

s3, regulating the temperature of the sewage in the blending pool to 20-32 ℃ and then transporting the sewage to an anaerobic tank;

s4, carrying out medium-temperature anaerobic fermentation on sewage in an anaerobic tank, digesting and degrading pollutants in the sewage to generate biogas, carrying out three-phase separation on gas, water and sludge through a three-phase separator to obtain biogas, treated water and sludge, storing the biogas in a gas storage tank, refluxing part of sludge to a hydrolysis neutralization tank, discharging the residual sludge for dehydration treatment, and discharging the treated water into an aeration tank;

s5, performing aerobic fermentation on the treated water in an aeration tank, further digesting and degrading pollutants in the treated water to obtain a cement mixture, and then discharging the cement mixture into a biochemical sedimentation tank;

s6, precipitating the cement mixture in a biochemical sedimentation tank to obtain purified water and precipitated sludge, discharging the precipitated sludge for dehydration treatment, and discharging the purified water into a biological detection tank;

s7, the biological detection pool detects indexes of the purified water, and the purified water is discharged into a river after the indexes reach the drainage standard.

7. The process according to claim 6, wherein in the step S7, if the water purification index does not reach the drainage standard, the purified water is returned to the blending tank.

8. The sewage treatment process according to claim 6, wherein in the step S3, the temperature sensor detects the temperature in the anaerobic tank and transmits the temperature data to the control unit, and the control unit controls the temperature adjusting unit to adjust the temperature of the sewage in the blending tank.

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