UNITANK-ASSR combined sewage sludge reduction device

Abstract

The utility model relates to the technical field of sewage treatment, and particularly discloses a UNITANK-ASSR combined sewage sludge reduction device, which consists of a UNITANK device and an anaerobic sidestream reactor, sewage inlets are respectively connected with the three partition tank bodies in the UNITANK, and the three partition tank bodies share part of wall bodies; stirrers and aeration devices are respectively arranged in the three tank bodies; the middle tank is connected with the anaerobic sidestream reactor through a pipeline, and a sludge outlet of the anaerobic sidestream reactor is communicated with the side tank. The system is suitable for treating urban domestic sewage, the functions of a biochemical tank and a sedimentation tank are integrated in a UNITANK reaction tank to form a UNITANK-ASSR combined treatment framework, a middle tank is used as an aeration tank and a transition tank, side tanks have the functions of the biochemical tank and the sedimentation tank, sewage is controlled to enter each reaction tank and treated water is discharged through a PLC automatic control system, and the sewage treatment efficiency is improved. Meanwhile, the anaerobic sidestream reactor is used for reducing the sludge source, so that the treatment and disposal cost of the sludge is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely relates to a UNITANK-ASSR combined sewage sludge reduction device. BACKGROUND

[0002] The sewage treatment system based on the activated sludge method can produce a large amount of residual sludge, and the treatment and disposal of the residual sludge causes a high cost, and improper treatment can cause certain threat to the ecological environment.

[0003] The UNITANK process has been widely applied to small and medium-sized sewage treatment plants at home and abroad, and is a kind of efficient, economical and flexible sewage treatment process, which can completely remove organic pollutants and has certain denitrification and phosphorus removal effect, and has the advantages of plug flow activated sludge method, can be operated at constant water level, resistant to impact load and stable operation. However, the high sludge yield is still one of the problems that cannot be avoided in the process, and the sludge treatment and disposal cost causes the burden of operation. And the corresponding subsequent treatment and disposal method of sludge, such as sludge dewatering, sludge incineration and sanitary landfill, has the disadvantages of high cost, large energy consumption and ecological environment hazard.

[0004] Compared with the subsequent sludge treatment, the sludge source reduction process has outstanding advantages. The ASSR (Anaerobic Side-stream Reactor (ASSR), modified aerobic-sediment-anaerobic) process forms sludge source reduction by constructing periodic aerobic-sediment-anaerobic alternation, so that part of the return sludge occurs sludge decay, energy uncoupling and extracellular polymeric substance dissociation under the condition of nutrient deficiency, and drives the process microbial community to the community structure of chronic growth microorganisms, thereby forming sludge source reduction. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a UNITANK-ASSR combined sewage sludge reduction device, which can solve the problem of high sludge yield while ensuring the pollutant removal capacity of the system.

[0006] To solve the above problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a UNITANK-ASSR combined sewage sludge reduction device, which comprises an anaerobic side stream reactor, a first side pool, a second side pool and a middle pool.

[0008] The first side pool and the second side pool share the pool wall with the middle pool, and the first side pool, the second side pool and the middle pool are all provided with a sewage inlet pipe.

[0009] The first side pool, the second side pool and the middle pool are all provided with a stirring device and an aeration device.

[0010] The anaerobic side flow reactor has a sludge inlet pipeline and a sludge outlet pipeline.

[0011] The middle pool is connected with the sludge inlet pipeline, and the first side pool and the second side pool are connected with the sludge outlet pipeline.

[0012] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure is provided with an electric water inlet valve on the sewage inlet pipeline.

[0013] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure is provided with a sludge inlet pipeline.

[0014] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure is provided with a sludge outlet pipeline.

[0015] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure further comprises a PLC.

[0016] The stirring device, the aeration device, the electric water inlet valve, the sludge inlet pump, the sludge outlet flow meter, the sludge outlet pump and the sludge reflux valve are electrically connected with the PLC.

[0017] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure is provided with a first side pool and a second side pool which are symmetrically distributed.

[0018] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure is provided with two sludge reflux valves.

[0019] The sludge outlet pipeline comprises a first branch pipeline, a second branch pipeline and a main pipeline.

[0020] The two sludge reflux valves are arranged on the first branch pipeline and the second branch pipeline respectively.

[0021] The sludge outlet flow meter and the sludge outlet pump are arranged on the main pipeline.

[0022] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure is provided with a first side pool, a second side pool and a middle pool which are rectangularly arranged.

[0023] The UNITANK-ASSR combined sewage sludge reduction device provided in at least one embodiment of the present disclosure is provided with a first communication port and a second communication port on the pool wall of the middle pool.

[0024] The first side pool and the second side pool are communicated with the middle pool through the first communication port and the second communication port respectively.

[0025] The UNITANK-ASSR combined sewage sludge reduction device provided by at least one embodiment of the present disclosure is provided with a water outlet weir in the first side pool and the second side pool.

[0026] The present application has the following beneficial effects:

[0027] The three-pool system of the UNITANK is formed by the shared wall body combination; and the periodic cycle of aerobic precipitation anaerobic is formed as a whole.

[0028] The UNITANK reaction pool is of a rectangular three-pool structure, and the pool bodies are communicated through wall opening holes, thereby reducing the construction difficulty and the wall thickness, saving the construction and operation of the connecting pipe; the aeration facility and the stirring facility are arranged in each pool body, and the first side pool and the second side pool are provided with a water outlet weir and a sludge discharge facility; the middle pool is used as an aeration pool and a transition pool, and the side pool has the functions of a biochemical pool and a sedimentation pool, and the sewage can enter each reaction pool and the treated water can be discharged through the PLC automatic control system, thereby reducing the labor cost.

[0029] Due to the periodic cycle process of aerobic precipitation anaerobic formed by the bypass system, the partial return sludge is subjected to sludge attenuation, energy decoupling and extracellular polymer dissociation in the poor nutrition state, and the process microbial community is driven to the succession of the community structure of the chronic growth microorganism, thereby achieving excellent reduction effect.

[0030] The UNITANK-ASSR combined sewage sludge reduction device has high water outlet stability, denitrification and phosphorus removal capacity and sludge reduction effect, and simultaneously realizes the source reduction of sludge, thereby reducing the burden of subsequent sludge treatment and disposal. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 It is a whole structure schematic view of the UNITANK-ASSR combined sewage sludge reduction device.

[0033] In the drawings:

[0034] 10, first side pool; 11, middle pool; 12, second side pool; 13, stirring device; 14, electric water inlet valve; 15, aeration device; 20, sludge inlet pump; 21, anaerobic side flow reactor; 30, sludge outlet flow meter; 31, sludge outlet pump; 32, sludge return valve. Detailed Implementation

[0035] The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments, not all embodiments.

[0036] In this embodiment, the wastewater inlet is connected to three partitioned tanks in the UNITANK via an electric inlet valve 14: the first side tank 10, the second side tank 12, and the middle tank 11, which share a portion of the wall. Each of the three tanks is equipped with a stirring device 13 and an aeration device 15. These tanks constitute the main system for removing pollutants. The middle tank 11 is connected to the anaerobic side-flow reactor 21 via a sludge inlet pipe. The sludge outlet pipe of the anaerobic side-flow reactor 21 is connected to the first side tank 10 and the second side tank 12. The functions of the biological treatment tank and the sedimentation tank are integrated into one. The middle tank 11 is used as an aeration tank and a transition tank, while the side tanks serve as both biological treatment tanks and sedimentation tanks. The main system, constructed by the UNITANK process device, is used to remove pollutants. The bypass system, consisting of the middle tank 11, the anaerobic side-flow reactor 21, the first side tank 10, and the second side tank 12, is used for sludge source reduction.

[0037] Specifically, such as Figure 1 As shown, the UNITANK-ASSR combined wastewater sludge reduction device in this embodiment includes an anaerobic side-flow reactor 21, a first side tank 10, a second side tank 12, a central tank 11, and a PLC (not shown).

[0038] The first side pool 10 and the second side pool 12 share the pool wall with the middle pool 11. The first side pool 10, the second side pool 12 and the middle pool 11 are all equipped with sewage inlet pipes. The first side pool 10 and the second side pool 12 are connected to the middle pool 11, forming a UNITANK process structure as a whole.

[0039] A stirring device 13 and an aeration device 15 are installed in the first side pool 10, the second side pool 12 and the middle pool 11;

[0040] The anaerobic side-flow reactor 21 has a sludge inlet pipe and a sludge outlet pipe; the middle tank 11 is connected to the sludge inlet pipe, and the first side tank 10 and the second side tank 12 are both connected to the sludge outlet pipe.

[0041] An electric inlet valve 14 is installed on the sewage inlet pipe.

[0042] The sludge inlet pipeline includes a sludge inlet pump 20 and a sludge inlet pipe; the sludge outlet pipeline includes a sludge outlet flow meter 30, a sludge outlet pump 31, a sludge return valve 32, and a sludge outlet pipe.

[0043] The stirring device 13, the aeration device 15, the electric water inlet valve 14, the sludge inlet pump 20, the sludge outlet flow meter 30, the sludge outlet pump 31 and the sludge backflow valve 32 are electrically connected with the PLC.

[0044] The first side pool 10 and the second side pool 12 are symmetrically distributed.

[0045] Specifically, the sludge backflow valve 32 is provided with two; the sludge outlet pipe is provided with a first branch pipe, a second branch pipe and a main pipe; the two sludge backflow valves 32 are arranged on the first branch pipe and the second branch pipe respectively; the sludge outlet flow meter 30 and the sludge outlet pump 31 are arranged on the main pipe; the first branch pipe and the second branch pipe are connected with the first side pool 10 and the second side pool 12 respectively, and the main pipe is connected with the anaerobic side flow reactor 21.

[0046] The first side pool 10, the second side pool 12 and the middle pool 11 are all provided in a rectangular shape; the first side pool 10 and the second side pool 12 are communicated with the middle pool 11 through the first communication port and the second communication port arranged on the pool wall of the middle pool 11.

[0047] The first side pool 10 and the second side pool 12 are both provided with a water outlet weir (not shown in the figure).

[0048] In application, the main system is divided into three stages for operation, which are as follows:

[0049] 1) The main stage, the sewage first enters the first side pool 10, and the conversion of anaerobic, anoxic and aerobic states of the first side pool 10 is realized by adjusting the opening degree of the aeration device and the start-stop of the stirring device 13. Since the first side pool 10 is in the state of water outflow after pre-deposition, a large amount of high-concentration sludge is deposited at the bottom. By adjusting the stirring intensity, the influent and the activated sludge are uniformly mixed, most of the organic matter is quickly adsorbed, and part of it is degraded. At the same time, the organic matter in the sewage is used as an electron donor to reduce NO3 -N by the denitrification of facultative bacteria; at the same time, the phosphorus in the high-concentration sludge deposited during the operation of the previous stage is released by using the easily degradable carbon source (VFAs) in the sewage. During the plug flow process, the sludge in the first side pool 10 enters the middle pool 11 and then enters the second side pool 12, so as to realize the redistribution of the sludge in each pool body, finally, the mixed liquid enters the second side pool 12 in the state of deposition for sludge-water separation, and the effluent is discharged through the water outlet weir. This stage includes the backflow of the high-concentration sludge at the bottom of the second side pool 12 to the anaerobic side flow reactor 21.

[0050] 2) The transition stage, the sewage enters the middle pool 11, the first side pool 10 is aerated, and manual sludge discharge is performed in the first side pool 10. The middle pool 11 stops aeration and stirring to realize the anaerobic state, and the second side pool 12 is still in the state of water outflow.

[0051] 3) Precipitation stage, the first side pool 10 starts to be static and prepares for water outflow, sewage still enters the middle pool 11, the middle pool 11 is aerated, and the second side pool 12 flows out.

[0052] 4) Change the sewage flow direction, and repeat the processes of 1) to 3) in sequence.

[0053] In the anaerobic side stream reactor 21 in the bypass system, first, after the exchange sludge enters the anaerobic side stream reactor 21, due to the change of substrate and environment, the aerobic microorganisms die, the cells are lysed, the sludge anaerobic digestion enters the hydrolysis acidification or hydrogen production stage, and finally the sludge after anaerobic digestion is backflowed to the aerobic unit of the UNITANK process. A large amount of organic matter produced after hydrolysis in the backflow sludge is completely degraded in the aerobic unit. In this way, the sludge is repeatedly circulated, so that the sludge reduction effect is achieved through sludge decay. Secondly, when the exchange sludge enters the anaerobic side stream reactor 21, under anaerobic conditions, a large amount of agglutinin appears to be dissociated due to reasons such as stirring, microbial lysis and low oxidation-reduction potential, releasing easily degradable proteins and Mg 2+ , and the concentration of K + is also increased; when the anaerobic sludge is backflowed to the UNITANK aerobic unit, the released proteins are completely degraded, Mg 2+ is recomplexed with organic matter such as proteins to form agglutinin, and K + is absorbed into the cytoplasm of microorganisms. Due to the continuous exchange of sludge, the agglutinin is continuously dissociated, degraded and complexed, so that the sludge reduction effect is achieved through the dissociation of extracellular polymeric substance metal complexes.

[0054] Although the embodiments of the application have been shown and described above, the protection scope of the utility model is not limited thereto, any change or replacement not through creative labor should be covered in the protection scope of the utility model; unless explicitly stated, any element, action or instruction used in the text should not be interpreted as critical or necessary.

Claims

1. A UNITANK-ASSR combined sewage sludge reduction device, characterized in that, The utility model relates to an anaerobic side flow reactor, a first side pool, a second side pool and a middle pool. The first side pool and the second side pool share a pool wall with the middle pool, and the first side pool, the second side pool and the middle pool are provided with a sewage inlet pipeline. The first side pool and the second side pool are in communication with the middle pool. The first side pool, the second side pool and the middle pool are provided with stirring devices and aeration devices. The anaerobic side flow reactor has a sludge inlet pipeline and a sludge outlet pipeline. The middle pool is connected with the sludge inlet pipeline, and the first side pool and the second side pool are connected with the sludge outlet pipeline. An electric inlet valve is arranged on the sewage inlet pipeline.

2. The UNITANK-ASSR combined sewage sludge reduction device according to claim 1, characterized in that, The sludge inlet pipeline comprises a sludge inlet pump and a sludge inlet pipe.

3. The UNITANK-ASSR combined sewage sludge reduction device according to claim 2, characterized in that, The sludge outlet pipeline comprises a sludge outlet flow meter, a sludge outlet pump, a sludge backflow valve and a sludge outlet pipe.

4. The UNITANK-ASSR combined sewage sludge reduction device according to claim 3, characterized in that, Further comprising:

5. The UNITANK-ASSR combined sewage sludge reduction device according to claim 4, characterized in that, A PLC; The stirring devices, the aeration devices, the electric inlet valve, the sludge inlet pump, the sludge outlet flow meter, the sludge outlet pump and the sludge backflow valve are electrically connected with the PLC. The first side pool and the second side pool are symmetrically distributed.

6. The UNITANK-ASSR combined wastewater and sludge reduction device according to claim 1, characterized in that, The sludge backflow valve is provided with two.

7. The UNITANK-ASSR combined wastewater sludge reduction device according to claim 4, characterized in that, The sludge outlet pipe comprises a first branch pipe, a second branch pipe and a main pipeline. The two sludge backflow valves are arranged on the first branch pipe and the second branch pipe respectively. The sludge outlet flow meter and the sludge outlet pump are arranged on the main pipeline. The first side pool, the second side pool and the middle pool are rectangularly arranged.

8. The UNITANK-ASSR combined wastewater sludge reduction device according to claim 1, characterized in that, The pool wall of the middle pool is provided with a first communication port and a second communication port.

9. The UNITANK-ASSR combined wastewater sludge reduction device according to claim 1, characterized in that, The first side pool and the second side pool are in communication with the middle pool through the first communication port and the second communication port respectively. The first side pool and the second side pool are provided with water outlet weirs.

10. The UNITANK-ASSR combined wastewater sludge reduction device according to claim 1, characterized in that, ​

Images