CN217173521U - A sewage treatment device with sludge reduction characteristics - Google Patents

Abstract

The utility model discloses a sewage treatment device with the characteristic of sludge reduction, which comprises a sewage reaction unit, an aeration tank and a filtering membrane reaction tank which are sequentially communicated along the flowing direction of sewage; the sewage reaction unit is used for producing an anoxic environment by the entering sewage; the aeration tank is communicated with the sewage reaction unit; the filtering membrane reaction tank comprises an oxygen blower and a suction disinfection unit which are communicated with each other; the oxygen blowing device and the suction disinfection unit are both arranged outside the filtering membrane reaction tank; the oxygen blower is used for supplying oxygen to the aeration tank and the filtering membrane reaction tank for aerobic reaction; the suction disinfection unit is provided with a clear water outlet; the sewage treatment device also comprises an anaerobic lateral flow reactor which is respectively communicated with the sewage reaction unit and the filtering membrane reaction tank; the anaerobic side flow reactor is used for crushing sludge and releasing organic matters; the filtering membrane reaction tank has the characteristic of efficient separation, can intercept pollutants in water, and is provided with an ultraviolet sterilizer for sterilizing filtered outlet water, so that the quality of the outlet water reaches the first-class A standard.

Description

A sewage treatment device with sludge reduction characteristics

technical field

The utility model relates to the field of sewage treatment, in particular to a sewage treatment device with sludge reduction characteristics.

Background technique

With the continuous increase in the construction scale and number of sewage treatment plants, the sewage treatment process with activated sludge method as the main body also produces a large amount of excess sludge. At present, the final disposal methods of sludge mainly include sanitary landfill, agricultural use, and building materials utilization. Wait.

Among them, sanitary landfill is the most widely used, but due to the large area of sludge landfill, and with the continuous increase of sludge production, the space that can be accommodated in the landfill is reduced, the land is tight, and the way of sanitary landfill is finally It will be difficult to cope with the huge sludge production.

In addition, sludge, as a by-product of sewage treatment, enriches many pollutants in sewage treatment, including heavy metals, pathogens and some persistent organic pollutants. 25% to 60% of the operating and management costs of the plant, and the current average cost is about 270 yuan/ton. Therefore, it is the general trend to shift sludge from terminal treatment and disposal to source reduction.

The currently used sludge reduction technologies mainly include physical, chemical, biological and other means, corresponding to ultrasonic cracking and heat treatment, ozone/chlorine gas contact and inoculation of micro-organisms, etc. From the perspective of mechanism to achieve sludge reduction, there are limitations such as immature technology and difficult engineering implementation.

Therefore, there is an urgent need for a technical solution that can solve the problem that the existing technology cannot achieve sludge reduction from the source.

Utility model content

The purpose of the utility model is to provide a sewage treatment device with sludge reduction characteristics, so as to solve the problem that the existing technology cannot realize the sludge reduction from the source.

In order to solve the above-mentioned technical problems, the utility model provides a sewage treatment device with sludge reduction characteristics, which includes a sewage reaction unit, an aeration tank and a filter membrane reaction tank connected in sequence along the sewage flow direction; the sewage The reaction unit is used for the entering sewage to create an oxygen-deficient environment; the aeration tank is connected and conducted with the sewage reaction unit; the filter membrane reaction tank includes an oxygen blower and a suction and disinfection unit that are connected and conducted; the The oxygen blower and the suction and disinfection unit are both arranged outside the filter membrane reaction tank; the oxygen blower is used to supply oxygen to the aeration tank and the filter membrane reaction tank for aerobic reaction; the suction The suction and disinfection unit is provided with a clean water outlet; the sewage treatment device further includes an anaerobic side-flow reactor connected to the sewage reaction unit and the filter membrane reaction tank respectively; the anaerobic side-flow reactor is used for crushing Sludge releases organic matter.

In one embodiment, the sewage reaction unit includes an anoxic reaction tank and an anaerobic reaction tank that are connected in sequence; the anoxic reaction tank is provided with a sewage inlet; the sludge inlet end of the anoxic reaction tank is respectively connected to The mud discharge end of the aeration tank and the mud discharge end of the anaerobic side flow reactor are connected and communicated.

In one embodiment, the filter membrane reaction tank further includes a filter membrane assembly, and the filter membrane assembly is respectively connected to the oxygen blower and the suction and disinfection unit in conduction.

In one embodiment, the suction and disinfection unit includes a suction pump, a flow meter and a sterilizer which are connected and conducted in sequence; the sterilizer is provided with the clean water outlet.

In one embodiment, the sterilizer is an ultraviolet sterilizer.

In one embodiment, the sewage treatment device further includes a clean water pool; the clean water pool is provided with a water inlet and a water outlet; the water inlet is connected and communicated with the clean water outlet.

In one embodiment, the sludge inlet end of the anaerobic side-flow reactor is connected and conducted with the sludge outlet end of the filtration membrane reaction tank; the anaerobic side-flow reactor is provided with a stirrer, and the stirrer It is extended from the upper part to the lower part of the anaerobic side flow reactor.

In one embodiment, the anaerobic side-flow reactor is further provided with a monitor; the monitor includes a sludge concentration meter, an oxidation-reduction potential probe and a temperature detection probe; the measuring end of the sludge concentration meter, Both the redox potential probe and the temperature detection probe extend into the anaerobic side flow reactor.

The beneficial effects of the present utility model are as follows:

The filter membrane reaction tank has the characteristics of high-efficiency separation, which can intercept suspended solids, organic pollutants, bacteria and viruses in the water, and the ultraviolet sterilizer is installed to sterilize the filtered effluent, thereby improving the effluent quality and realizing the effluent quality. The target of the Grade A standard; the sewage treatment device through the construction of anoxic-short-term anaerobic-aerobic-long-term anaerobic cycle cycle process, to achieve sludge sludge reduction, while strengthening the effect of denitrification and phosphorus removal.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the following briefly introduces the accompanying drawings used in the implementation manner. Obviously, the accompanying drawings in the following description are only some implementations of the present utility model. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 is a schematic structural diagram of a sewage treatment device provided by the present invention.

The reference numbers are as follows:

1- sewage reaction unit;

10- anoxic reaction tank; 11- sewage inlet; 20- anaerobic reaction tank;

30- aeration tank;

40-filter membrane reaction tank; 41-filter membrane module; 42-oxygen blower; 43-suction disinfection unit; 431-suction pump; 432-flow meter; 433-sterilizer; 434-clean water outlet;

50-clear water pool; 51-water inlet; 52-water outlet;

60 - Anaerobic side flow reactor; 61 - Stirrer; 62 - Monitor.

Detailed ways

The technical solutions in 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.

An embodiment of the sewage treatment device is shown in Figure 1, including a sewage reaction unit 1, an aeration tank 30 and a filter membrane reaction tank 40 that are connected in sequence along the flow direction of the sewage; Oxygen environment; the aeration tank 30 is connected and conducted with the sewage reaction unit 1; the filter membrane reaction tank 40 includes an oxygen blower 42 and a suction disinfection unit 43 that are connected and conducted; the oxygen blower 42 and the suction disinfection unit 43 are both located in the Outside the filter membrane reaction tank 40; the oxygen blower 42 is used to supply oxygen to the aeration tank 30 and the filter membrane reaction tank 40 for aerobic reaction; the suction and disinfection unit 43 is provided with a clean water outlet 434; The reaction unit 1 and the filtration membrane reaction tank 40 are connected to a conducting anaerobic side-flow reactor 60; the anaerobic side-flow reactor 60 is used for breaking sludge to release organic matter.

In the application, the oxygen blower 42 can be a fan when necessary. The fan can introduce oxygen into the sewage to increase the dissolved oxygen in the sewage, and can also blow air to the membrane assembly 41 to prevent the membrane assembly 41 from filtering When the sewage is polluted, the filter membrane is blocked; the sewage undergoes aerobic phosphorus uptake reaction in the aeration tank 30 .

Further, in this embodiment, as shown in FIG. 1 , the sewage reaction unit 1 includes an anoxic reaction tank 10 and an anaerobic reaction tank 20 that are connected in sequence; the anoxic reaction tank 10 is provided with a sewage inlet 11; the anoxic reaction tank 10 is provided with a sewage inlet 11; The mud ends are respectively connected to the mud discharge end of the aeration tank 30 and the mud discharge end of the anaerobic side flow reactor 60 .

In the application, after the denitrification reaction is performed in the anoxic reaction tank 10, the sewage enters the anaerobic reaction tank 20 for anaerobic phosphorus release and organic matter decomposition.

Further, in this embodiment, as shown in FIG. 1 , the filter membrane reaction tank 40 further includes a filter membrane assembly 41 , and the filter membrane assembly 41 is connected to the oxygen blower 42 and the suction and disinfection unit 43 respectively.

Further, in this embodiment, as shown in FIG. 1 , the suction and disinfection unit 43 includes a suction pump 431 , a flow meter 432 and a sterilizer 433 which are connected and conducted in sequence; the sterilizer 433 is provided with a clean water outlet 434 .

Further, in this embodiment, as shown in FIG. 1 , the sterilizer 433 is an ultraviolet sterilizer.

During application, the sterilizer 433 can kill bacteria, pathogens and other harmful organisms in the effluent.

Further, in this embodiment, as shown in FIG. 1 , the sewage treatment device further includes a clean water tank 50 ; the clean water tank 50 is provided with a water inlet 51 and a water outlet 52 ;

Further, in this embodiment, as shown in FIG. 1 , the mud inlet end of the anaerobic side flow reactor 60 is connected to the mud outlet end of the filtration membrane reaction tank 40; the anaerobic side flow reactor 60 is provided with a stirrer 61, 61 extends from the upper part of the anaerobic side flow reactor 60 to the lower part.

During application, the arrangement of the agitator 61 extending from the upper part to the lower part of the anaerobic side-flow reactor 60 is helpful to fully agitate the liquid and sludge in the reactor, avoid sludge deposition and cause blockage, and is conducive to anaerobic The sludge of the oxygen side flow reactor 60 is exchanged and circulated; the agitator 61 adopts the control method of intermittent stirring. The service life of the agitator 61 is guaranteed.

Further, in this embodiment, as shown in FIG. 1, the anaerobic side flow reactor 60 is further provided with a monitor 62; the monitor 62 includes a sludge concentration meter, an oxidation-reduction potential probe and a temperature detection probe; the measuring end of the sludge concentration meter , redox potential probe and temperature detection probe are all extended into the anaerobic side flow reactor 60 .

During application, various parameters in the anaerobic side-flow reactor 60 can be known in time by setting the monitor 62, so as to know the operation status of the anaerobic side-flow reactor 60 and perform timely regulation.

During the application, the sewage first enters the anoxic reaction tank 10, and the denitrification reaction is carried out by means of the entering sewage and the nitrate in the mixed liquid returned from the aeration tank 30, and at the same time, part of the sludge in the membrane reaction tank 40 flows into the anaerobic side. The flow reactor 60 flows back to the anoxic reaction tank 10 after a hydraulic retention time of 5 to 10 days; then the sewage passes through the anaerobic reaction tank 20 for anaerobic phosphorus release and organic matter decomposition, and enters the aeration tank 30 for aerobic uptake. Phosphorus reaction, the effluent is filtered out through the filter membrane assembly 41 of the filter membrane reaction tank 40, and then sterilized by the sterilizer 433, and flows into the clean water tank 50; Pollutants, bacteria and viruses, etc., improve the effluent quality and achieve the first-level A standard; the sludge concentration in the filtration membrane reaction tank 40 is relatively high, which can ensure that the sludge concentration in the anaerobic side-flow reactor 60 and the subsequent return to the shortage The amount of sludge in the oxygen reaction tank 10; at the same time, through the anaerobic side flow reactor 60, the impact of the higher dissolved oxygen in the return sludge of the direct filtration membrane reaction tank 40 on the anoxic reaction tank 10 is alleviated; the entire system forms An anoxic-short-term anaerobic-aerobic-long-term anaerobic cycle cycle process is developed, and the sludge undergoes cell rupture under the action of the agitator 61 in the anaerobic side-flow reactor 60, and the extracellular polymer is dispersed, and the sludge is released. A large amount of organic matter is added to the supernatant to achieve the effect of sludge reduction; at the same time, the sludge mixture (including sludge and supernatant) of the anaerobic side flow reactor can be returned to the anoxic reaction tank 10 to provide Carbon source, fully adapt to low-carbon sewage, and strengthen the effect of nitrogen and phosphorus removal; in addition, under the alternating action of anoxic-short-term anaerobic-aerobic-long-term anaerobic environment, it is conducive to the growth of slow microorganisms, and filtration The membrane reaction tank 40 prolongs the sludge age, makes the microorganisms in the endogenous respiration period, and the sludge yield is low, further realizing the sludge reduction, and theoretically realizing zero discharge of excess sludge.

During sewage treatment, the method adopted by the sewage treatment device includes the following steps:

Sewage treatment stage: low-carbon sewage enters the anoxic reaction tank 10, and the denitrification reaction is carried out by means of the sewage influent and the nitrate in the mixed solution returned from the aeration tank 30; and then the sewage passes through the anaerobic reaction tank 20 for anaerobic phosphorus release. It is decomposed with organic matter, enters the aeration tank 30 for aerobic phosphorus uptake reaction, and the effluent is filtered by the filter membrane assembly 41 of the filter membrane reaction tank 40 and flows out to the clear water tank 50. The hydraulic retention time of the aeration tank 30 is respectively 2 to 4 hours, 2 to 4 hours and 4 to 6 hours, and the internal reflux ratio from the aeration tank 30 into the anoxic reaction tank 10 is 200% to 500%, The external return ratio of the reaction tank 40 entering the anoxic reaction tank 10 is 50% to 100%. Here, the sludge concentration of the anoxic reaction tank 10 can be supplemented to adjust the bacterial community structure; Sludge and pollutant particles, and then go through the sterilizer 433 to disinfect bacteria and pathogens in the water, optimize the water quality, so as to achieve the first-level A effluent;

Sludge reduction stage: The sludge enters the anaerobic side-flow reactor 60 from the filter membrane reaction tank 40, and its exchange ratio is 10% (calculated according to the proportion of the absolute dry sludge mass in the aeration tank), and the exchange number is 4 times/ After 5 days of hydraulic retention time in the anaerobic side-flow reactor 60, the sludge undergoes reactions such as cell rupture and extracellular polymer dispersion, which reduces the sludge production, and then returns to the anoxic reaction tank 10; thus, The mixed sludge forms anoxic-short-term anaerobic-aerobic-long-term anaerobic cycle process; the sludge concentration in the filter membrane reaction tank 40 is relatively high, which can ensure the sludge concentration in the anaerobic side flow reactor 60 and the subsequent return flow At the same time, through the anaerobic flow measuring reactor, the impact of the higher dissolved oxygen in the sludge returned directly from the filter membrane reaction tank 40 to the anoxic reaction tank 10 is alleviated.

The above is the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can also be made. These improvements and modifications It is also regarded as the protection scope of the present invention.

Claims (8)

1. A sewage treatment device with sludge reduction characteristics, characterized in that, It includes a sewage reaction unit, an aeration tank and a filter membrane reaction tank that are connected in sequence along the flow direction of the sewage; The sewage reaction unit is used for the entering sewage to create an oxygen-deficient environment; The aeration tank is connected and conducted with the sewage reaction unit; The filtration membrane reaction pool includes an oxygen blower and a suction sterilization unit that are connected and conducted; both the oxygen blower and the suction sterilization unit are located outside the filtration membrane reaction pool; the oxygen blower is used for supplying Oxygen is given to the aeration tank and the filter membrane reaction tank for aerobic reaction; the suction and disinfection unit is provided with a clean water outlet; The sewage treatment device further includes an anaerobic side-flow reactor which is connected and communicated with the sewage reaction unit and the filtration membrane reaction tank respectively; the anaerobic side-flow reactor is used for breaking sludge to release organic matter. 2. The sewage treatment device according to claim 1, characterized in that, The sewage reaction unit includes an anoxic reaction tank and an anaerobic reaction tank that are connected in sequence; The anoxic reaction tank is provided with a sewage inlet; The mud inlet end of the anoxic reaction tank is respectively connected and communicated with the mud outlet end of the aeration tank and the mud outlet end of the anaerobic side flow reactor. 3. The sewage treatment device according to claim 1, characterized in that, The filter membrane reaction tank also includes a filter membrane assembly, and the filter membrane assembly is respectively connected to the oxygen blower and the suction and disinfection unit. 4. The sewage treatment device according to claim 3, characterized in that, The suction sterilization unit includes a suction pump, a flow meter and a sterilizer that are connected and conducted in sequence; The sterilizer is provided with the clean water outlet. 5. The sewage treatment device according to claim 4, characterized in that, The sterilizer is an ultraviolet sterilizer. 6. The sewage treatment device according to claim 1, characterized in that, The sewage treatment device also includes a clear water pool; The clean water pool is provided with a water inlet and a water outlet; the water inlet is connected and communicated with the clean water outlet. 7. The sewage treatment device according to any one of claims 1 to 6, characterized in that, The mud inlet end of the anaerobic side flow reactor is connected and communicated with the mud outlet end of the filtration membrane reaction tank; The anaerobic side-flow reactor is provided with a stirrer, and the agitator is extended from the upper part of the anaerobic side-flow reactor to the lower part. 8. The sewage treatment device according to claim 7, characterized in that, The anaerobic side flow reactor is also provided with a monitor; The monitor includes a sludge concentration meter, a redox potential probe and a temperature detection probe; The measuring end of the sludge concentration meter, the redox potential probe and the temperature detection probe all extend into the anaerobic side flow reactor.

Images