Aerobic and anaerobic integrated granule sludge reactor and wastewater treatment method thereof

A technology of anaerobic granular sludge and aerobic granular sludge, applied in aerobic and anaerobic process treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problem of difficult cultivation of aerobic granular sludge , easy disintegration and other problems, to achieve the effect of compact reactor structure, short cultivation time and improved efficiency

Active Publication Date: 2017-01-04
NANJING UNIV
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Problems solved by technology

[0007] Aiming at the existing problems (most of the aerobic granular sludge processes currently use sequencing batch reactors, which have the disadvantages of low sewage treatment efficiency, slow formation of aerobic particles during start-up, and easy disintegration of aerobic particles during operation) , the present invention provides an aerobic-anaerobic integrated combined reactor and a method for treating wastewater thereof, integrating aerobic granular sludge and anaerobic granular sludge into the same reactor, so that anaerobic granular sludge Converting to aerobic granular sludge can solve the problems that aerobic granular sludge is difficult to cultivate and easy to disintegrate during operation; on the other hand, the present invention can realize continuous flow operation of aerobic granular sludge, improving the efficiency of sewage treatment

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  • Aerobic and anaerobic integrated granule sludge reactor and wastewater treatment method thereof

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Embodiment 1

[0030] The reactor adopts a cylindrical structure, the diameter of the reaction zone is 5cm, the height is 50cm, the volume of the reaction zone is 1L, and the diameter of the upper separation zone is 8cm. The reactor is started by inoculating anaerobic granular sludge, and an aeration device is installed on the side of the reactor. The height of the aeration can be adjusted according to the water quality of the effluent; Anaerobic granular sludge will be converted into aerobic granular sludge, and there are both aerobic granular sludge and anaerobic granular sludge in the same reactor; the reactor uses continuous inflow water, and the treatment efficiency is higher than that of traditional sequencing batch. Oxygen particle technology; a three-phase separator is installed on the top, and the three-phase separator realizes the separation of water, gas and mud; the dissolved oxygen automatic feedback device and the pH automatic feedback device are installed in the reactor, and th...

Embodiment 2

[0034] The device and treatment process are as mentioned above, using this device to treat a certain industrial wastewater, the COD of the influent is 290-310mg / L, NH 4 + -N is 95-105mg / L. Influent water enters the anaerobic particle area through the water distribution device at the bottom of the reactor, and most of the organic matter is removed in this area. Sewage flows out of the anaerobic zone into the aerobic granule zone where residual organic matter and nitrogen are removed. The dissolved oxygen automatic feedback control device and pH automatic feedback device installed in the aerobic granular sludge area control the dissolved oxygen and pH to 1.5mg / L and 7.8, respectively. The sewage continues to flow upward, and the three-phase separator at the top of the reactor is used to separate gas, liquid and solid. Part of the effluent is discharged from the reactor through the overflow weir, and the other part is refluxed to the bottom of the reactor through the reflux dev...

Embodiment 3

[0036] The device and treatment process are as mentioned above, the COD of influent nitrogen-containing organic wastewater treated by this device is 500-4000 mg / L, NH 4 + -N is 190~500mg / L, the influent water enters the reactor from the water distribution device at the bottom of the reactor, and then passes through the anaerobic granular sludge area and the aerobic granular sludge area, and the dissolved oxygen installed in the aerobic granular sludge area automatically The feedback control device and pH automatic feedback device control the dissolved oxygen and pH to be between 1-1.5 mg / L and 7.5-7.8 respectively. The sewage continues to flow upwards, and the three-phase separator at the top of the reactor is used to separate gas, liquid and solid. Part of the effluent is discharged from the reactor through the overflow weir, and the other part is refluxed to the bottom of the reactor through the reflux device. The reflux ratio of the effluent is based on The effluent water ...

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Abstract

The invention discloses an aerobic and anaerobic integrated granule sludge reactor and a wastewater treatment method thereof, and belongs to the field of wastewater treatment. Aerobic granule sludge and anaerobic granule sludge are integrated into the same reactor, continuous flow operation of the granule sludge process is achieved, and the problem that the aerobic granule sludge is difficult to culture and prone to disintegration in the operation process is solved. In the wastewater treatment method, anaerobic granule sludge is added into the reactor in the start stage, aeration is carried out in the middle of the reactor, after a period of time, aerobic particles are formed in the upper portion of an aeration point, and anaerobic particles increased on the middle and lower portion in the operation process can enter an aerobic region on the upper portion and are gradually converted into aerobic particles. The concentration of dissolved oxygen in the aerobic region on the upper portion of the reactor is controlled to be 0.5-1.5 mg/L in the operation process, the pH value in the reactor is 7.8-8.0, and the reflux ratio is 50-200%. The device and method are capable of efficiently removing organic matter and nitrogen in sewage, and the device has the advantages of being small in occupied area, stable in operation, low in cost and the like.

Description

technical field [0001] The invention belongs to a sewage treatment device and a treatment method thereof, in particular to a device and a method for removing organic matter and nitrogen in water through the integrated combined use of aerobic granular sludge and anaerobic granular sludge. Background technique [0002] With the rapid development of my country's economy, the output of industrial wastewater and domestic sewage is increasing, and the pressure on the natural environment is also increasing accordingly. Among them, organic matter and nitrogen are the most common pollutants in sewage. After nitrogen in sewage enters natural water bodies, it will cause eutrophication and damage the ecological environment of water bodies. When organic matter enters natural water bodies, it will consume dissolved oxygen, leading to deterioration of water quality and affecting the survival of aquatic organisms. On the other hand, some toxic and harmful organic matter entering water bodie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F101/16C02F101/30
CPCC02F3/301C02F2101/16C02F2101/30
Inventor 叶林孙浩浩张徐祥任洪强
Owner NANJING UNIV
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