CN109694130B - Device for realizing sludge suspension and avoiding sludge loss and use method thereof - Google Patents
Device for realizing sludge suspension and avoiding sludge loss and use method thereof Download PDFInfo
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- CN109694130B CN109694130B CN201910174656.8A CN201910174656A CN109694130B CN 109694130 B CN109694130 B CN 109694130B CN 201910174656 A CN201910174656 A CN 201910174656A CN 109694130 B CN109694130 B CN 109694130B
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention discloses a device for realizing sludge suspension and avoiding sludge loss and a use method thereof, comprising a reactor body, a water outlet control part and a multi-loop gas utilization part, wherein the reactor body comprises a water inlet gallery, a reactor, a three-phase separator and a water outlet, the water inlet is connected with the water inlet gallery, the bottom end of the water inlet gallery is communicated with the reactor, the three-phase separator is positioned at the upper part of a reaction zone in the reactor, and the top of the reactor is communicated with the water outlet; the water outlet control part is arranged at the top of the reactor and is connected with the water outlet in series; the multi-loop gas utilization part comprises a gas stirring system, a gas stripping reflux system and a gas disturbance system, and the three systems are respectively communicated with the water inlet gallery and the reactor to realize gas disturbance. The environment created by the device is not only beneficial to granulating the sludge, but also effectively avoids the loss of the sludge, quickens the granulating and enriching of microorganisms, realizes the effective interception of microorganisms and shortens the starting time of the reactor.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a device for realizing sludge suspension and avoiding sludge loss and a use method thereof.
Background
Biochemical treatment of sewage has been considered as the most economical treatment. The key to realize the efficient treatment of pollutants in sewage is to realize the efficient enrichment of related functional microorganisms in the unit volume of a reactor under specific environment. Sludge granulation has been considered as one of the methods for achieving efficient sludge enrichment. In recent years, studies on the formation process and mechanism around sludge granulation have never been interrupted. However, many researchers found that in the reactor for promoting the granulation and enrichment culture of the gas-producing microorganism sludge, the problem that the sludge is not effectively separated due to irregular granulation, and the sludge is promoted to float up in the precipitation area is serious. The amount of sludge lost is often greater than the amount produced by the system relative to slow-growing autotrophic microorganisms, often resulting in difficult enrichment of microorganisms in the reactor and even start-up failure, such as autotrophic denitrification sludge, granulation and enrichment culture of anaerobic ammoxidation sludge. Therefore, how to realize sludge granulation, promote solid-gas separation and enhance the interception capability of a reactor is always a problem which needs to be solved urgently in researchers and engineering application processes.
In the process of promoting granulation of sludge, the currently developed reactors rely mainly on mechanical stirring or by mechanical reflux of liquid, promoting the sludge in the reactor zone in suspension and thorough mixing with the nutrient solution. Few researchers have suspended sludge by gas and mixed with nutrient solutions, and most if not all have been accomplished with additional gases, such as air, nitrogen, etc., and few have utilized the gas produced by the microorganisms themselves as a medium. Regarding the problem of sludge interception in a reactor, the current method of repeated precipitation, membrane separation or rotary separator arranged at the top of the reactor is adopted for intercepting granular sludge, and the method has not been found that the gas generated by microorganisms is adopted as power and medium to cause disturbance of a precipitation area so as to promote solid-gas separation to realize sludge interception. Aiming at the problems of high inlet water concentration and large fluctuation, which is easy to cause irregular granulation of sludge, the adoption of a reflux pump for refluxing and diluting the outlet water is always the first choice of researchers and engineering users, and the development of a reactor for realizing the refluxing and diluting the outlet water by using gas generated by microorganisms as power is rarely realized. Therefore, in the sludge granulation culture process, how to simplify the device, reduce the equipment requirement and the additional power consumption, and meanwhile, a novel device capable of realizing efficient interception of the sludge is still required to be further developed.
Disclosure of Invention
The invention aims to provide a device for realizing sludge suspension and avoiding sludge loss and a use method thereof, which are used for solving the problems of the prior art, and have the characteristics of simple structure, less equipment, low power requirement, easiness in control and effective interception of granular sludge.
In order to achieve the above object, the present invention provides the following solutions: the invention provides a device for realizing sludge suspension and avoiding sludge loss, which comprises a reactor body, a water outlet control part and a multi-loop gas utilization part,
the reactor body comprises a water inlet gallery, a reactor, a three-phase separator and a water outlet, wherein the water inlet is connected with the water inlet gallery, the bottom end of the water inlet gallery is communicated with the reactor, the three-phase separator is positioned at the upper part of a reaction zone in the reactor, and the top of the reactor is communicated with the water outlet;
the water outlet control part is arranged at the top of the reactor and is connected with the water outlet in series;
the multi-loop gas utilization part comprises a gas stirring system, a gas stripping reflux system and a gas disturbance system, and the three systems are respectively communicated with the reactor and the water inlet gallery to realize sludge suspension and avoid sludge loss.
Preferably, the reactor body is cylindrical or square, the water inlet gallery is positioned on the periphery or one side of the reactor, a cover plate is arranged at the top of the water inlet gallery, and the bottom of the water inlet gallery is communicated with the reaction zone.
Preferably, the three-phase separator comprises a horn-shaped gas collecting cover and guide plates positioned at two sides of the bottom end of the gas collecting cover.
Preferably, a submerged water outlet weir is arranged above the reactor and positioned on the outer side of the top of the gas collecting cover, and the whole body of the submerged water outlet weir comprises water outlet holes with equal height.
Preferably, the water outlet control system comprises a liquid level floating ball and a water outlet valve, an upper perforation baffle and a lower perforation baffle are arranged at the horn mouth of the horn-shaped gas collection cover, and the liquid level floating ball is positioned between the upper perforation baffle and the lower perforation baffle and is connected with the water outlet valve arranged at the water outlet through a traction rope.
Preferably, the gas stirring system comprises a first gas guide pipe, a gas reflux pump and an aeration disc, wherein the aeration disc is arranged at the bottom of the inner side of the reactor, one end of the first gas guide pipe and the aeration disc are connected with the gas reflux pump, and the other end of the first gas guide pipe is connected with the top of the gas collecting cover.
Preferably, the gas stripping reflux system comprises a water outlet reflux pipe and a second air guide pipe, wherein one end of the water outlet reflux pipe is connected with a sedimentation zone positioned at the top of the reactor, and the other end of the water outlet reflux pipe is connected with the water inlet gallery; one end of the second air duct is connected with the top of the gas collecting cover and the front end of the gas reflux pump, and the other end of the second air duct is connected with the water outlet reflux pipe in the water inlet gallery.
Preferably, the gas disturbance system comprises a third gas duct and a perforated pipe, one end of the third gas duct is connected with the top of the water inlet gallery, and the other end of the third gas duct is connected with the perforated pipe in the precipitation zone.
Preferably, the perforated pipes are uniformly distributed on the surface of the sedimentation zone.
The invention also provides a method for realizing sludge suspension and avoiding sludge loss, which is applied to the device for realizing sludge suspension and avoiding sludge loss, and comprises the following steps:
inoculating the activated sludge containing microorganisms into a reactor, entering a nutrient solution from a water inlet gallery, giving the environment such as temperature, DO, pH and the like required by the growth of the microorganisms, and collecting the gas generated by the microorganisms in a reaction zone into a bell mouth of a three-phase separator;
the gas collected in the three-phase separator is blown into the aerobic zone again through an aeration disc by a gas reflux pump of a gas stirring system, so that the suspension growth of the sludge is realized;
simultaneously, the gas stripping reflux system utilizes gas stripping in the bell mouths of the three separators to gas-lift liquid in the water outlet reflux pipe into the water inlet gallery, so as to realize dilution of water quality in the water inlet gallery;
the gas after gas stripping is collected above the water inlet gallery, solid-gas separation of suspended sludge in a precipitation zone of the reactor is realized through a gas disturbance system, and finally, the gas is discharged above the precipitation zone;
meanwhile, the liquid level continuously floats up and down in the upper baffle and the lower baffle due to continuous collection of gas in the horn mouth of the three-phase separator and discharge of the gas disturbance system, so that a liquid level floating ball of a water outlet valve also floats up and down, and a water outlet switch is closed through a traction rope, namely, when the liquid level floating ball is close to an upper gear, a water outlet valve is opened, the floating ball is close to a lower gear, and the water outlet valve is closed.
Compared with the prior art, the invention has the following technical effects:
the device for realizing sludge suspension and avoiding sludge loss and the use method thereof in the invention are actually a device and a method for realizing sludge suspension, granulation and avoiding sludge loss based on gas disturbance, which utilize gas generated by microorganisms as a medium of sludge-water disturbance to realize bottom sludge-water mixing, simultaneously utilize redundant tail gas as power to realize self-refluxing dilution water inflow of effluent, collect gas again, disturb floating sludge in a precipitation area, promote the solid-gas separation of the floating sludge and then precipitate, enhance the separation effect of a three-phase separator, and avoid the consumption of extra substances and power. The created environment is not only beneficial to granulating the sludge, but also effectively avoids the loss of the sludge, accelerates the granulating and enriching of the microorganism for the culture of the autotrophic microorganism with slow growth, realizes the effective interception of the microorganism and shortens the starting time of the reactor. Compared with the existing device with mechanical stirring, water outlet pump backflow and membrane interception, the reactor structure is simplified, the equipment requirement is reduced, and the control is easier.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of an apparatus for achieving sludge suspension and avoiding sludge loss;
wherein, 1 a reactor; 2, a water inlet gallery; 3, a water inlet; 4, a water outlet; 5 a three-phase separator; 6, submerged water outlet weir; 7, punching a baffle up and down; 8, a liquid level floating ball; 9, a water outlet valve; a first airway tube 10; 11 a gas reflux pump; 12 aeration disc; 13 a second airway; 14 a water outlet return pipe; 15 a third air duct; 16 perforated pipes.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. 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.
The invention aims to provide a device for realizing sludge suspension and avoiding sludge loss and a use method thereof, which are used for solving the problems of the prior art, and have the characteristics of simple structure, less equipment, low power requirement, easiness in control and effective interception of granular sludge.
Based on the device, the device for realizing sludge suspension and avoiding sludge loss comprises a reactor body, a water outlet control part and a multi-loop gas utilization part, wherein the reactor body comprises a water inlet gallery, a reactor, a three-phase separator and a water outlet, the water inlet is connected with the water inlet gallery, the bottom end of the water inlet gallery is communicated with the reactor, the three-phase separator is positioned at the upper part of a reaction zone in the reactor, and the top of the reactor is communicated with the water outlet; the water outlet control part is arranged at the top of the reactor and is connected with the water outlet in series; the multi-loop gas utilization part comprises a gas stirring system, a gas stripping reflux system and a gas disturbance system, and the three systems are respectively communicated with the reactor and the water inlet gallery to realize sludge suspension and avoid loss.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Referring to fig. 1, fig. 1 is a schematic diagram of an overall structure of an apparatus for suspending sludge and avoiding sludge loss.
As shown in fig. 1, the invention provides a device for suspending and avoiding loss of granular sludge based on gas disturbance, which comprises a reactor body, a water outlet control system and a multi-loop gas utilization system, wherein the reactor body comprises a water inlet gallery 2, a reactor 1, a three-phase separator 5, a submerged water outlet weir 6 and a water outlet 4, the water outlet control part comprises a liquid level floating ball 8 and a water outlet valve 9, the multi-loop gas utilization part comprises a gas stirring system, a gas stripping reflux system and a gas disturbance system, the gas stirring system further comprises a first gas guide pipe 10, a gas reflux pump 11 and an aeration disc 12, the gas stripping reflux system comprises a water outlet reflux pipe 14 and a second gas guide pipe 13, and the gas disturbance system comprises a third gas guide pipe 15 and a perforated pipe 16.
Further, the reactor body may be cylindrical or square; the water inlet gallery 2 is positioned on the periphery or one side of the reactor 1, the water inlet gallery 2 is a closed space, the top is provided with a cover plate, and the bottom is communicated with the reaction zone.
The three-phase separator 5 comprises a horn-shaped gas collection cover and guide plates, wherein the guide plates are positioned at two sides of the bottom of the horn opening of the gas collection cover, and the guide plates enable gas to enter the horn opening of the three-phase separator.
The submerged water outlet weir 6 is positioned above the reactor 1, the whole body of the submerged water outlet weir comprises water outlet holes with equal height, and the water outlet holes are positioned 10-20 cm below the water surface.
Further, a water outlet valve 9 of the water outlet control part is positioned at the water outlet 4 and is connected with a liquid level floating ball 8 by a traction rope. The liquid level floating ball 8 is positioned between the upper perforation baffle 7 and the lower perforation baffle 7 in the gas collecting cover, the liquid level floating ball 8 is close to the upper gear, the water outlet valve 9 is opened, the liquid level floating ball 8 is close to the lower gear, and the water outlet valve 9 is closed.
Further, an aeration disc 12 of the gas stirring system is positioned at the bottom of the reactor 1, and the aeration quantity is determined according to the size of the bottom of the reactor 1. One end of the first air duct 10 is connected with the top end of the gas collecting cover, and the other end is connected with the gas reflux pump 11.
The water outlet return pipe 14 of the gas stripping return system is connected with the sedimentation zone at one end and the water inlet gallery 2 at the other end (the gas stripping return system is a method commonly used by a professional, the gas direction is upward, the water of the return pipe is also carried out, the water falls on the water inlet gallery 2 due to gravity after coming out of the pipe, and the gas stripping collection is collected at the top of the water inlet gallery 2). One end of the second air duct 13 is connected with the gas collecting cover, and also connected with the front end of the gas reflux pump 11, and the other end is connected with the water outlet reflux pipe 14 in the water inlet gallery 2
In the gas disturbance system, one end of a third air duct 15 is connected with the top of the water inlet gallery 2, and the other end of the third air duct is connected with a perforated pipe 16 in the sedimentation zone; the third air duct 15 is to reuse the gas collected in the water inlet gallery 2 after the second air duct 13 is used, and the gas enters the perforated pipe 16 through the third air duct 15 and then is discharged. The perforated pipe 16 is located 3-5 cm below the water surface or the perforated pipe 16 is uniformly distributed on the surface of the sedimentation area.
The invention also provides a method for realizing the suspension and avoiding the loss of the granular sludge based on the gas disturbance, which comprises the following steps:
inoculating activated sludge containing microorganisms into a reactor 1, introducing nutrient solution from a water inlet 3 of a water inlet gallery 2, giving the environment such as temperature, DO, ph and the like required by the growth of the microorganisms, and collecting gas generated by the microorganisms in a reaction zone into a bell mouth of a three-phase separator 5;
the gas collected in the three-phase separator 5 is blown into the aerobic zone again through the aeration disc 12 by the gas reflux pump 11 of the gas stirring system, so that the suspension growth of the sludge is realized;
simultaneously, the gas stripping reflux system utilizes gas stripping in the bell mouths of the three separators to gas-lift the liquid in the water outlet reflux pipe 14 into the water inlet gallery 2, so as to realize dilution of water quality in the water inlet gallery 2;
the gas after gas stripping is collected above the water inlet gallery 2, solid-gas separation of suspended sludge in a settling zone of the reactor 1 is realized through a gas disturbance system, and finally the gas is discharged above the settling zone;
meanwhile, the liquid level continuously floats up and down in the upper baffle and the lower baffle due to continuous collection of gas in the horn mouth of the three-phase separator 5 and discharge of the gas disturbance system, so that the liquid level floating ball 8 of the water outlet valve 9 also floats up and down, and the switch of the water outlet 4 is closed through a traction rope, namely, when the liquid level floating ball 8 is close to the upper gear, the water outlet valve 9 is opened, the floating ball is close to the lower gear, and the water outlet valve 9 is closed.
The method is characterized in that gas generated by microorganisms is collected in a gas collection cover, the gas collected in the gas collection cover is refluxed to a reaction zone by utilizing a gas reflux pump 11 in a gas stirring system, so that the mixing of the microorganisms and nutrient solution is ensured, sludge granulation is promoted, and meanwhile, the residual tail gas is used as power, and the effluent of a precipitation zone is refluxed to a water inlet gallery 2 by utilizing a gas stripping reflux system, so that the concentration of water inlet substances in the gallery is diluted. And collecting the tail gas after gas stripping above the water inlet gallery 2, and carrying out solid-gas separation on the floating mud in the precipitation zone through a gas stripping stirring system again to promote the precipitation of the mud and strengthen the three separation functions of the three separators.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
1. The utility model provides a device that realizes mud suspension and avoid mud to run off which characterized in that: comprises a reactor body, a water outlet control part and a multi-loop gas utilization part,
the reactor body comprises a water inlet gallery, a reactor, a three-phase separator and a water outlet, wherein the water inlet is connected with the water inlet gallery, the bottom end of the water inlet gallery is communicated with the reactor, the three-phase separator is positioned at the upper part of a reaction zone in the reactor, and the top of the reactor is communicated with the water outlet;
the water outlet control part is arranged at the top of the reactor and is connected with the water outlet in series;
the multi-loop gas utilization part comprises a gas stirring system, a gas stripping reflux system and a gas disturbance system, and the three systems are respectively communicated with the reactor and the water inlet gallery to realize sludge suspension and avoid sludge loss;
the three-phase separator comprises a horn-shaped gas collection cover and guide plates positioned at two sides of the bottom end of the gas collection cover; the gas stirring system comprises a first gas guide pipe, a gas reflux pump and an aeration disc, wherein the aeration disc is arranged at the bottom of the inner side of the reactor, one end of the first gas guide pipe and the aeration disc are connected with the gas reflux pump, and the other end of the first gas guide pipe is connected with the top of the gas collecting cover; the gas stripping reflux system comprises a water outlet reflux pipe and a second gas guide pipe, one end of the water outlet reflux pipe is connected with a sedimentation zone positioned at the top of the reactor, and the other end of the water outlet reflux pipe is connected with the water inlet gallery; one end of the second air duct is connected with the top of the gas collecting cover and the front end of the gas reflux pump, and the other end of the second air duct is connected with the water outlet reflux pipe in the water inlet gallery; the gas disturbance system comprises a third air duct and a perforated pipe, one end of the third air duct is connected with the top of the water inlet gallery, and the other end of the third air duct is connected with the perforated pipe positioned in the precipitation zone;
the water outlet control part comprises a liquid level floating ball and a water outlet valve, an upper perforation baffle and a lower perforation baffle are arranged at the horn mouth of the horn-shaped gas collection cover, and the liquid level floating ball is positioned between the upper perforation baffle and the lower perforation baffle and is connected with the water outlet valve arranged at the water outlet through a traction rope.
2. The apparatus for achieving sludge suspension and avoiding sludge loss as claimed in claim 1, wherein: the reactor body is cylindrical or square, the water inlet gallery is located on the periphery or one side of the reactor, a cover plate is arranged at the top of the water inlet gallery, and the bottom of the water inlet gallery is communicated with the reaction zone.
3. The apparatus for achieving sludge suspension and avoiding sludge loss as claimed in claim 1, wherein: and a submerged water outlet weir is arranged above the reactor and outside the top of the gas collecting cover, and the whole body of the submerged water outlet weir is provided with water outlets with equal height.
4. The apparatus for achieving sludge suspension and avoiding sludge loss as claimed in claim 1, wherein: the perforated pipes are uniformly distributed on the surface of the sedimentation area.
5. A method for realizing sludge suspension and avoiding sludge loss, which is applied to the device for realizing sludge suspension and avoiding sludge loss as claimed in any one of the claims 1-4, and is characterized in that: the method comprises the following steps:
inoculating activated sludge containing microorganisms into a reactor, entering nutrient solution from a water inlet gallery, giving temperature, DO and pH environments required by the growth of the microorganisms, and collecting gas generated by the microorganisms in a reaction zone in a bell mouth of a three-phase separator;
the gas collected in the three-phase separator is blown into the aerobic zone again through an aeration disc by a gas reflux pump of a gas stirring system, so that the suspension growth of the sludge is realized;
simultaneously, the gas stripping reflux system utilizes gas stripping in the bell mouth of the three-phase separator to gas-lift liquid in the water outlet reflux pipe into the water inlet gallery, so as to realize dilution of water quality in the water inlet gallery;
the gas after gas stripping is collected above the water inlet gallery, solid-gas separation of suspended sludge in a precipitation zone of the reactor is realized through a gas disturbance system, and finally, the gas is discharged above the precipitation zone;
meanwhile, the liquid level continuously floats up and down in the upper baffle and the lower baffle due to continuous collection of gas in the horn mouth of the three-phase separator and discharge of the gas disturbance system, so that a liquid level floating ball of a water outlet valve also floats up and down, and a water outlet switch is closed through a traction rope, namely, when the liquid level floating ball is close to an upper gear, a water outlet valve is opened, the floating ball is close to a lower gear, and the water outlet valve is closed.
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| CN110980936B (en) * | 2019-12-14 | 2022-04-29 | 浙江永续环境工程有限公司 | Biological nitrogen and phosphorus removal device for HJDLZYS and application thereof |
| CN114590884A (en) | 2020-12-03 | 2022-06-07 | 苏州科技大学 | Gas-liquid recycling device |
| CN112759201A (en) * | 2021-01-15 | 2021-05-07 | 西安建筑科技大学 | Self-maintenance sewage treatment integrated equipment and sewage treatment method thereof |
| CN113772895A (en) * | 2021-10-09 | 2021-12-10 | 肇庆市鹏凯环保装备有限公司 | Sewage treatment system capable of being superposed up and down |
| CN115591501B (en) * | 2022-11-29 | 2023-06-20 | 天津高能时代水处理科技有限公司 | Reactor with two-phase reaction and three-phase separation function |
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