CN203402963U - High-concentration ammonia-nitrogen wastewater treatment device - Google Patents

Abstract

The utility model discloses a treatment device for high ammonia nitrogen waste water, which comprises an aeration tank provided with a water inlet pipe, a water outlet pipe and a mud discharge pipe. The aeration tank is provided with a decanter, an aeration device and a mud discharge pump, and is characterized in that The aeration tank is provided with a hydraulic circulation pipe network; the hydraulic circulation pipe network is a group of water pipes provided with several water spray holes, and the hydraulic circulation pipe network is arranged at the bottom of the aeration tank and connected by a circulating water pipe and a circulating water pump; The aeration device is arranged between the decanter and the hydraulic circulation pipe network and near the side of the hydraulic circulation pipe network. Compared with the prior art, the utility model has the biodegradability of waste water and high CODcr removal rate, compact equipment structure, easy operation and low operation cost.

Description

A high ammonia nitrogen wastewater treatment device

technical field

The utility model relates to the technical field of sewage treatment, in particular to a high ammonia nitrogen wastewater treatment device.

Background technique

At present, the treatment of high ammonia nitrogen wastewater generally adopts MBR, A-O and SBR processes. The MBR process is a new type of high-efficiency sewage treatment process that combines high-efficiency membrane separation technology with traditional activated sludge process. It uses membrane modules to separate the mixed liquid in the aeration tank by membrane filtration, and the MBR membrane modules can be placed in the aeration tank. In the pool, it can also be placed outside the pool. After aerobic aeration and biological treatment, the water is filtered by the pump through the filter membrane and then pumped out to meet the standard discharge. The use of membrane modules for separation saves the secondary settling tank in the traditional biochemical process, and at the same time, the good quality of effluent water can save the tertiary treatment process. Using membrane separation technology, the complete separation of HRT and SRT is realized, so that the sludge concentration can reach 6000-12000 mg/L, eliminating the harm caused by sludge bulking, and greatly improving the removal rate of refractory organic matter. However, the engineering cost of the MBR process is high, the investment is large, and the daily operation and maintenance costs of the device are relatively high, and the energy consumption is large.

The A/O water treatment process uses an anoxic section in the front section and an aerobic section in the back section in series. In the anoxic section, heterotrophic bacteria hydrolyze suspended pollutants such as starch, fiber, carbohydrates, and soluble organic matter in sewage into organic Acid, which decomposes macromolecular organic matter into small molecular organic matter, and converts insoluble organic matter into soluble organic matter. When these products of anaerobic hydrolysis enter the aerobic tank for aerobic treatment, the biodegradability of sewage and the efficiency of oxygen can be improved; In the anoxic section, heterotrophic bacteria ammoniate pollutants such as protein and fat (N on the organic chain or amino groups in amino acids) to release ammonia (NH3, NH4+). Nitrification oxidizes NH3-N (NH4+) to NO3-, which is returned to pool A through reflux control. Under anoxic conditions, the denitrification of heterotrophic bacteria reduces NO3- to molecular nitrogen (N2) to complete C, N , O cycle in the ecology, realize the harmless treatment of sewage. The A/O process has a high removal effect on organic matter such as ammonia nitrogen in wastewater, the process is simple, the treatment efficiency is high, the investment is low, and the operation cost is low. However, the degradation rate of hard-to-degrade substances is low. To improve the denitrification efficiency, the internal circulation ratio must be increased, thus increasing the operating cost. the

The SBR water treatment process uses wastewater to be mixed with pre-cultivated activated sludge in a bioreactor to perform anoxic or aerobic reactions, and to proliferate microbial cells while degrading organic matter. At the same time, the bioreactor is not only an aeration tank, anoxic tank, but also a sedimentation tank. During the sedimentation period, the aeration is stopped to separate the activated sludge from the water, and the wastewater is treated. The SBR process has good purification effect, high degradation efficiency, simple process flow, low equipment cost, and is easy to operate and maintain. The disadvantages are: intermittent cycle operation, high requirements for self-control, low nitrogen and phosphorus removal efficiency, and low treatment efficiency.

Utility model content

The purpose of this utility model is a high ammonia nitrogen wastewater treatment device designed for the deficiencies of the prior art. It adopts a hydraulic circulation pipe network and an aeration device to realize continuous and alternate anoxic hydrolysis and aerobic biological treatment, and quickly treat ammonia nitrogen. , Continuous nitrification and denitrification treatment, improve biodegradability of wastewater and CODcr removal rate, simple process, compact equipment structure, easy operation and low operating cost.

The purpose of this utility model is achieved as follows: a high ammonia nitrogen wastewater treatment device, including an aeration tank equipped with water inlet pipes, outlet pipes and mud discharge pipes, and a decanter, aeration device and mud discharge pipes are arranged in the aeration tank The pump and the aeration device are connected by the air pipe to the fan, the mud pump is connected to the mud discharge pipe, and the decanter is set on the upper part of the aeration tank, and the water outlet is connected to the water outlet pipe. It is characterized in that the aeration tank is equipped with a hydraulic cycle pipe network; the hydraulic circulation pipe network is a group of water pipes with several water spray holes, the hydraulic circulation pipe network is set at the bottom of the aeration tank and connected by the circulating water pipe and the circulating water pump; the aeration device is set at the decanter Between the device and the hydraulic circulation pipe network and near the side of the hydraulic circulation pipe network.

The mud pump, decanter, fan and circulating water pump are controlled by PLC programming.

The aeration tank or a multi-pool water treatment system composed of two or more in parallel. the

The aeration tank is equipped with an online water quality monitor linked with PLC programming. the

Compared with the prior art, the utility model has the following advantages: (1) The treatment efficiency is improved, the anoxic and aerobic states in the pool are in a rapid alternating state, and the purification effect on high ammonia nitrogen wastewater is good, especially the nitrogen and phosphorus removal effect is better, and the reverse The nitrification process saves the power consumption of aeration and oxygenation, and the operating cost is low. (2) Each process in the process can be adjusted according to the water quality and water quantity, the operation is flexible, and the operation effect is stable. The sewage settles in an ideal static state, which requires short time, high efficiency, and good effluent quality.

(3) Shock load resistance. There is stagnant treated water in the pool, which can dilute and buffer sewage, and effectively resist the impact of water volume and organic pollution load. (4) The equipment is simple in structure, low in cost, compact in layout, small in floor space, simple in process flow, and easy to operate and maintain. the

Description of drawings

Fig. 1 is the structural representation of the utility model

Fig. 2 is embodiment figure.

Detailed ways

Referring to accompanying drawing 1, the utility model is made up of the aeration tank 1 that is provided with water inlet pipe 11, outlet pipe 12 and mud discharge pipe 13, and described aeration tank 1 is provided with decanter 2, aeration device 4, discharge The mud pump 5 and the hydraulic circulation pipe network 7; the hydraulic circulation pipe network 7 is a group of water pipes provided with several water spray holes 71, and the hydraulic circulation pipe network 7 is arranged on the bottom of the aeration tank 1 by the circulating water pipe 72 and the circulating water pump. 73 connection; the aeration device 4 is arranged between the decanter 2 and the hydraulic circulation pipe network 7 and near the top of the hydraulic circulation pipe network 7, and the aeration device 4 is connected with the fan 42 by the air pipe 41; the mud pump 5 is set in the sump 6 at the bottom of the aeration tank 1, and the sludge discharge pump 5 is connected to the sewage pipe 13; The decanter 2, the sludge pump 5, the fan 42 and the circulating water pump 73 are controlled by PLC programming; the aeration tank 1 is equipped with an online water quality monitor 8 linked with PLC programming.

Example 1 

When the utility model is put into operation, it is the same as the cultivation of conventional biochemical systems. The pressure filter sludge from ordinary urban sewage plants is added into the system, and the dosage of bacteria is generally 3-5%. Ammonia nitrogen load for cultivation and acclimatization. The utility model will be described in further detail below with the embodiment of the water treatment system formed by the parallel connection of two ponds.

Referring to accompanying drawing 2, open the first water inlet valve 15, the high ammonia nitrogen wastewater to be treated enters the first aeration tank 1 from the water inlet pipe 11, and stops the water intake when the first aeration tank 1 reaches the set liquid level, When the first water inlet valve 15 is closed, the first circulating water pump 73 and the second water inlet valve 25 are turned on, and the second aeration tank 2 starts to feed high ammonia nitrogen wastewater. At this time, the hydraulic circulation system composed of the first hydraulic circulation pipe network 7, the first circulating water pipe 72 and the first circulating water pump 73 starts to vigorously circulate and stir the high-ammonia nitrogen wastewater in the first aeration tank 1, and quickly forms anoxic During the anoxic reaction operation, the first hydraulic circulation pipe network 7 can meet the requirement of strong stirring and mass transfer without dead ends in the whole pool. After the anoxic hydrolysis is completed, the first circulating water pump 73 stops running, and when the first circulating water pump 73 is closed, the first fan 42 is turned on, and the first air pipe 41 inputs the compressed air into the first aeration device 4 for oxygenation and aeration. The aerobic reaction is followed by the operation of the aerobic reaction after the anoxic reaction of the high ammonia nitrogen wastewater. The PLC programming control sets the conversion times of the A/O process according to the ammonia nitrogen content of the wastewater, and repeatedly performs anoxic and aerobic reactions on the high ammonia nitrogen wastewater to obtain good nitrification and denitrification treatment effects. After completing the set number of A/O process changes, the first online monitor 8 will automatically detect whether the wastewater treatment in the first aeration tank 1 meets the standard. If the detected water quality does not meet the discharge standard, the PLC programming control will be based on the first The detection data of the online monitor 8 sets the conversion times of the A/O process to meet the requirements for ammonia nitrogen and COD degradation. After the water quality of the first aeration tank 1 reaches the standard, the first fan 42 stops running, and the first aeration tank 1. Start to stand still for sedimentation. When the activated sludge and water precipitation and separation reach a predetermined height, open the water outlet 3 of the first decanter 2 to discharge the precipitated supernatant out of the pool through the outlet pipe 12. After a period of operation, the excess activated sludge is discharged out of the tank by the first sludge discharge pump 5 through the sludge discharge pipe 13 during the sedimentation period, and the first aeration tank 1 finishes the treatment of high ammonia nitrogen wastewater, and the entire treatment process is programmed by PLC The control and the online monitoring instrument 8 are linked and coordinated to complete.

When the second aeration tank 21 reaches the set liquid level, the water intake is stopped, and the second water circulation pump 273 is opened while the second water inlet valve 25 is closed. If the water treatment of the first aeration tank 1 has finished and can be When the waste water is received, the first water inlet valve 15 is opened at the same time, and the waste water with high ammonia nitrogen enters into the first aeration tank 1 again. At this time, the hydraulic circulation system composed of the second hydraulic circulation pipe network 27, the second circulating water pipe 272 and the second circulating water pump 273 starts to vigorously circulate and stir the high-ammonia nitrogen wastewater in the second aeration tank 21, and quickly forms anoxic During the anoxic reaction operation, the second hydraulic circulation pipe network 27 can also meet the requirement of strong stirring and mass transfer without dead ends in the whole pool. After the anoxic hydrolysis is completed, the second circulating water pump 273 stops running. When the second circulating water pump 273 is closed, the second blower fan 242 is turned on, and the second air pipe 241 inputs compressed air into the second aeration device 24 for oxygenation and aeration. The aerobic reaction is followed by the operation of the aerobic reaction after the anoxic reaction of the high ammonia nitrogen wastewater. The PLC programming control sets the conversion times of the A/O process according to the dissolved oxygen content of the wastewater, and repeatedly performs anoxic and aerobic reactions on the high ammonia nitrogen wastewater to obtain good nitrification and denitrification treatment effects. After completing the set number of A/O process changes, the second online monitor 28 automatically detects whether the wastewater treatment in the second aeration tank 21 is up to standard. The detection data of the online monitor 28 sets the conversion times of the A/O process to meet the requirements for the degradation of ammonia nitrogen and COD. After the water quality of the second aeration tank 21 reaches the standard, the second fan 42 stops running, and the second aeration tank 21 and start to stand still for sedimentation. When the activated sludge and water precipitation separation reach a predetermined height, open the water outlet 23 of the second decanter 22 to discharge the precipitated supernatant out of the pool through the outlet pipe 12. After a period of operation, the excess activated sludge is discharged out of the pond by the second sludge discharge pump 25 through the sludge discharge pipe 13 during the sedimentation period, and the treatment of high ammonia nitrogen wastewater is completed. The whole processing process is completed through the linkage and cooperation of PLC programming control and online monitor 28 .

When the amount of waste water is insufficient, the utility model can use a single pool to meet the requirements of waste water treatment. When the amount of wastewater is large, two or more pools can be connected in parallel for alternate operation to meet domestic sewage in small and medium-sized towns and industrial wastewater from factories and mines, especially wastewater treatment projects with intermittent discharge and large flow changes. PLC programming control can adjust the running time of each stage according to the specific nature of sewage, effluent water quality, and effluent quality. The control method is flexible and convenient. It can degrade organic matter, remove phosphorus and nitrogen, and prevent eutrophication of rivers and lakes. In places where water resources are scarce and land use is tight, it is especially suitable for treating industrial wastewater with small amount of wastewater and intermittent discharge and scattered point source pollution.

The above is only a further description of the utility model, and is not intended to limit the patent, and all equivalent implementations of the utility model should be included in the scope of claims of the patent.

Claims (4)

1. A high ammonia nitrogen wastewater treatment device, comprising an aeration tank (1) provided with a water inlet pipe (11), an outlet pipe (12) and a mud discharge pipe (13), the aeration tank (1) is provided with decanting water device (2), aeration device (4) and mud discharge pump (5), the aeration device (4) is connected to the fan (42) by the air pipe (41), the mud discharge pump (5) and the mud discharge pipe (13) Connection, the decanter (2) is set on the upper part of the aeration tank (1) and connected by the water outlet (3) and the outlet pipe (12), which is characterized in that the aeration tank (1) is equipped with a hydraulic circulation pipe network (7); the hydraulic circulation pipe network (7) is a group of water pipes provided with several water spray holes (71), and the hydraulic circulation pipe network (7) is arranged on the bottom of the aeration tank (1) by the circulating water pipe ( 72) Connected to the circulating water pump (73); the aeration device (4) is set between the decanter (2) and the hydraulic circulation pipe network (7) and on the side near the hydraulic circulation pipe network (7). 2. The high ammonia nitrogen wastewater treatment device according to claim 1, characterized in that the sludge discharge pump (5), decanter (2), fan (42) and circulating water pump (73) are controlled by PLC programming. 3. The high-ammonia-nitrogen wastewater treatment device according to claim 1, characterized in that the aeration tank (1) or a multi-pool water treatment system composed of two or more in parallel. 4. The high ammonia nitrogen wastewater treatment device according to claim 1 or claim 2, characterized in that the aeration tank (1) is equipped with an online water quality monitor (8) linked with PLC programming.

Images