CN216890573U

CN216890573U - Activated sludge hydrolytic fermentation carbon source supplementing device

Info

Publication number: CN216890573U
Application number: CN202122551194.2U
Authority: CN
Inventors: 王珏; 赵文兵; 王刚; 吴俊文; 江树威
Original assignee: Guangzhou Sinovast Energy Environmental Protection Group Co ltd
Current assignee: Guangzhou Sinovast Energy Environmental Protection Group Co ltd
Priority date: 2021-10-22
Filing date: 2021-10-22
Publication date: 2022-07-05
Anticipated expiration: 2031-10-22

Abstract

The utility model discloses a carbon source supplementing device for activated sludge hydrolytic fermentation, which comprises a sludge pump, a dosing device, a mixer and a hydrolytic fermentation tank, wherein the sludge pump is connected with a sludge inlet of the mixer, the dosing device is connected with a medicament inlet of the mixer, the mixer is connected with the hydrolytic fermentation tank, and the activated sludge uniformly mixed with a medicament is fed into the hydrolytic fermentation tank for fermentation and hydrolysis. The device carries out fermentation treatment with the primary sludge and the excess sludge in the sewage treatment system, hydrolysises macromolecular organic matters in the activated sludge into degradable micromolecular organic matters, supplies the sewage treatment system as an external carbon source, and reduces the sewage treatment cost.

Description

Activated sludge hydrolytic fermentation carbon source supplementing device

Technical Field

The utility model relates to a sewage treatment system, in particular to a carbon source supplementing device for activated sludge hydrolysis and fermentation.

Background

The lack of carbon source of inlet water is a troublesome problem generally faced by sewage treatment plants in China at present, and particularly, the problems that the denitrification and dephosphorization efficiency of a biochemical system is low, the quality of outlet water does not reach the standard and the like are caused by the shortage of rapidly degradable organic matters (rbCOD) in the inlet water. Meanwhile, with the increasing requirements of people and countries on environmental protection, the nitrogen and phosphorus removal efficiency of sewage plants is enhanced, and the establishment of stricter discharge standards is a necessary choice for improving the water body environment in the future. The current methods of wastewater treatment relying on external addition of carbon sources are not economical in the continuous operation of wastewater treatment plants. Therefore, in response to more stringent treatment standards and to improve the prospects for sustainable development, methods for reducing or even eliminating the supplementation of external carbon sources are sought.

In recent years, the concept of recovering an "internal carbon source" for supplementing a carbon source has attracted wide attention, and mainly utilizes primary sludge and excess sludge for hydrolysis to generate volatile short-chain fatty acids, so that the volatile short-chain fatty acids play a role as a carbon source to participate in the sewage treatment process of nitrogen and phosphorus removal. On one hand, the investment and operation cost is reduced, and on the other hand, the sludge yield is reduced. The sludge hydrolysis technology is a new technology for developing a potential internal carbon source, can effectively reduce the cost of a sewage plant and improve the operation stability and reliability of a sewage treatment system. The hydrolysis of the activated sludge can convert macromolecular organic matters into degradable micromolecular organic matters. Small molecular organic matters generated by hydrolysis are further converted into VFAs through fermentation, and the normal proceeding of biological phosphorus removal is ensured. At present, sewage plants generally have low carbon-nitrogen ratio and low carbon-phosphorus ratio, so that the biological nitrogen and phosphorus removal effect is not ideal, and the nitrogen and phosphorus of effluent do not reach the standard.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for supplementing a carbon source by activated sludge hydrolysis and fermentation, which is used for fermenting primary sludge and excess sludge in a sewage treatment system, hydrolyzing macromolecular organic matters in activated sludge into degradable micromolecular organic matters, and supplying the degradable micromolecular organic matters as an external carbon source to the sewage treatment system, so that the sewage treatment cost is reduced.

The technical scheme provided by the utility model is as follows: the utility model provides an activated sludge hydrolytic fermentation supplyes carbon source device, includes the sludge pump, advances mud pipe, charge device, blender and hydrolysis fermentation jar, the sludge pump is connected with the mud mouth of advancing of blender through advancing the mud pipe, charge device advances the medicine mouth with the blender and is connected, the blender is connected with the hydrolysis fermentation jar through advancing the mud pipe, will carry out fermentation hydrolysis in sending into the hydrolysis fermentation jar with medicament misce bene activated sludge.

As an embodiment, the hydrolysis fermentation tank comprises a tank body, a stirrer and a mud distributing reflection plate, wherein the stirrer and the mud distributing reflection plate are arranged in the tank body, a deodorization pipe for discharging gas in the tank, a water outlet and a mud inlet are arranged at the upper part of the tank body, and a cone hopper type mud discharging pipe is arranged at the bottom of the tank body.

Furthermore, a microwave antenna is arranged in the hydrolysis fermentation tank and connected with an external microwave generator, and can emit microwaves into the sludge, so that the hydrolysis fermentation speed of the activated sludge is increased.

Furthermore, a DO monitor is further arranged in the hydrolysis fermentation tank and used for monitoring the content of dissolved oxygen in the tank in real time.

The utility model can be improved by additionally arranging a mud feeding cylinder. The central axis of the stirring shaft of the mud inlet cylinder and the stirring machine and the mud distribution reflecting plate coincides, the mud inlet cylinder is positioned right above the mud distribution reflecting plate, the mud outlet of the mud inlet cylinder faces the mud distribution reflecting plate, and the mud inlet pipe extends into the tank and is communicated with the mud inlet cylinder.

In one embodiment, the mud distribution reflecting plate has a conical profile, which is beneficial to the flow distribution of activated sludge.

The utility model can be further improved as follows, a sludge flow regulating system is arranged between the sludge pump and the mixer, and the sludge flow regulating system specifically comprises an electromagnetic flow meter and a control valve, and the sludge flow is regulated and controlled, so that the hydrolysis and acidification time of the sludge in the fermentation tank is controlled.

Further, the sludge inlet pipe is also provided with a pH value on-line monitor, and the pH value on-line monitor is connected with the dosing device and used for adjusting the adding amount of the medicament according to the pH value of the sludge.

The dosing device comprises a dosing pump and a dosing pipe, and the dosing pump is connected with the medicine inlet of the mixer through the dosing pipe.

Compared with the prior art, the utility model has the following beneficial effects:

(1) the utility model provides a carbon source supplementing device for activated sludge hydrolysis and fermentation, which is used for fermenting primary sludge and excess sludge in a sewage treatment system, hydrolyzing macromolecular organic matters in activated sludge into degradable micromolecular organic matters, and supplying the degradable micromolecular organic matters as an external carbon source to the sewage treatment system, so that the sewage treatment cost is reduced.

(2) The hydrolysis fermentation tank is internally provided with the microwave antenna, and the microwave antenna emits microwaves into the activated sludge, so that the flow of the activated sludge is increased, and the hydrolysis fermentation speed of the activated sludge is increased.

(3) The utility model is provided with the sludge flow regulating system which comprises the electromagnetic flowmeter and the control valve, controls the hydrolysis reaction time of the sludge by regulating the flow of the sludge, regulates the pH value, increases the alkalinity and promotes the release of pollutants, simultaneously improves the hydrolysis fermentation speed of the activated sludge by combining the microwave radiation, does not need an additional carbon source, greatly saves the medicament cost, reduces the generation amount of the sludge, is an efficient, energy-saving and environment-friendly sludge and sewage treatment device, and has wide application prospect.

Drawings

FIG. 1 is a schematic structural diagram of a carbon source supplementing device for hydrolysis and fermentation of activated sludge;

in the figure: 1. the system comprises a sludge pump, a control valve, an electromagnetic flow meter, a pipeline mixer, a chemical dosing pump, a pH online monitor, a sludge inlet pipe, a hydrolysis fermentation tank, a sludge inlet barrel, a sludge distribution reflecting plate, a stirrer, a stirring shaft, a water outlet weir, a microwave antenna, a DO monitor, a sludge discharge pipe, a sludge hopper, a deodorization pipe and a microwave generator, wherein the chemical dosing pump is arranged at 3, the pH online monitor is arranged at 6, the sludge inlet pipe is 7, the hydrolysis fermentation tank is 8, the sludge inlet barrel is 9, the sludge distribution reflecting plate is 10, the stirrer is 11, the stirring shaft is 111, the water outlet weir is 12, the microwave antenna is 13, the DO monitor is 14, the sludge discharge pipe is 15, the sludge hopper is 16, the deodorization pipe is 17, and the microwave generator is 18.

Detailed Description

The technical scheme of the utility model is clearly and completely described below with reference to the accompanying drawings. It should be noted that the embodiment described below is only one embodiment of the present invention, and not all embodiments. Based on the embodiments of the present invention, those skilled in the art can make any changes and modifications to the technical solution of the present invention without creative efforts, and the technical solution belongs to the protection scope of the present invention.

The activated sludge hydrolysis fermentation carbon source supplementing device shown in figure 1 comprises a sludge pump 1, a sludge inlet pipe 7, a sludge flow regulating device, a dosing device, a pipeline mixer 4 and a hydrolysis fermentation tank 8. The sludge pump 1, the sludge flow adjusting device, the pipeline mixer 4 and the fermentation tank 8 are connected in sequence through a sludge inlet pipe 7. The sludge flow regulating device comprises a control valve 2 and an electromagnetic flowmeter 3 which are separated by a certain distance, and the sludge flow is controlled by regulating the control valve 2 and the battery flowmeter 3, so that the hydrolysis acidification time of sludge in the hydrolysis fermentation tank 8 is controlled. The dosing device comprises a medicament tank (not shown in the figure), a dosing pump 5 and a medicament inlet pipe, wherein an output port of the dosing pump 5 is connected with a medicament inlet of the pipeline mixer 4 through the medicament inlet pipe, and NaOH with the mass concentration of 30% is added into the pipeline mixer 4 to adjust the pH value of the activated sludge to 8-9 in the pipeline mixer 4. The section of the sludge inlet pipe 7 connected with the fermentation tank 8 is provided with a pH on-line monitor 6 electrically connected with the dosing pump 5 and used for monitoring the pH value of the activated sludge in the sludge inlet pipe 7 so as to adjust the dosing amount in time, thereby controlling the pH value of the activated sludge in the sludge inlet pipe 7 to be 8-9.

In this embodiment, the hydrolysis fermentation tank 8 comprises a tank body, the top of which is provided with an observation window and a deodorization pipe 17, the upper tank wall is provided with a water outlet and a sludge inlet, the upper part of the inner wall of the tank body is provided with a water outlet weir 12 communicated with the water outlet, and the bottom of the inner wall of the tank body is provided with a cone hopper-shaped sludge hopper 6 and a sludge discharge pipe 15. The inside of the tank body is provided with a stirrer 11, a mud inlet cylinder 9, a mud distribution reflecting plate 10, a microwave antenna 13 and a DO monitor 14. The mud inlet cylinder 9 and the mud distribution reflecting plate 10 are respectively installed in the tank body through mounting frames, wherein the mud inlet cylinder 9 is arranged right above the mud distribution reflecting plate 10, a mud outlet of the mud inlet cylinder faces the mud distribution reflecting plate 10, and the vertical central line of the mud inlet cylinder 9 and the mud distribution reflecting plate 10 coincides with the central axis of the stirring shaft 111 of the stirring machine 11. The mud inlet pipe 7 extends into the tank body and is communicated with the mud inlet barrel 9. In this embodiment, the outer contour of the cloth/mud reflecting plate 10 is a frustum shape, and the top thereof has a through hole through which the stirring shaft 111 of the stirrer 11 passes. The motor of the stirrer 11 is positioned at the top of the fermentation tank, the stirring shaft 111 is vertically arranged in the tank body and penetrates through the sludge inlet cylinder 9 and the sludge distribution reflecting plate 10, and one end with a stirring paddle extends to the sludge hopper 16. The microwave antenna 13 is arranged at the middle lower part of the tank body and is connected with a microwave generator 18 outside the tank body. The DO monitor 14 is arranged at the middle lower part of the tank body and monitors the content of dissolved oxygen in the tank body in real time.

The sludge pump 1 pumps the activated sludge, the flow of the activated sludge is adjusted through the control valve 2 and the electromagnetic flow meter 3, the activated sludge is input into the pipeline mixer 4 and is uniformly mixed with NaOH with the mass concentration of 30 percent, and the pH value of the activated sludge is adjusted to 8-9 and then is input into the hydrolysis fermentation tank 8. In the process, the pH value change condition in the mud inlet pipe 7 is monitored by the pH value on-line monitor 6 in real time, the dosing frequency is increased when the pH value is lower than 8, and the dosing frequency is reduced when the pH value is higher than 9. The activated sludge with the adjusted pH value enters the sludge inlet cylinder 9 through the sludge inlet pipe 7, the sludge flows out of the sludge inlet cylinder 9, and the activated sludge is uniformly distributed at the bottom of the tank by the sludge reflecting plate 10. The stirrer 11 is started to stir, the sludge is promoted to be hydrolyzed, fermented and hydrolyzed rapidly through stirring, the microwave antenna 13 in the hydrolysis fermentation tank 8 generates microwaves, and the hydrolysis fermentation speed of the activated sludge is further improved through microwave radiation. The bottom of the hydrolysis fermentation tank 8 is designed to be conical, which is beneficial to the backflow of the sludge after the concentration and fermentation, and the sludge after the hydrolysis fermentation flows back to the biochemical reaction tank through the sludge discharge pipe 15 at the bottom of the sludge hopper 16, so as to supplement carbon source for the biochemical reaction tank, strengthen the nitrogen and phosphorus removal and realize the sludge reduction. The biogas generated by the fermentation reaction is recovered through the deodorization pipe 17, and the supernatant is discharged from the water outlet through the effluent weir 12.

Claims

1. The utility model provides an activated sludge hydrolytic fermentation supplyes carbon source device, characterized by, include sludge pump (1), advance mud pipe (7), charge device, blender (4) and hydrolysis fermentation jar (8), sludge pump (1) is connected through the mud mouth that advances of mud pipe (7) and blender (4), charge device advances the medicine mouth with blender (4) and is connected, blender (4) are connected with hydrolysis fermentation jar (8) through advancing mud pipe (7), will send into with the active sludge of medicament misce bene in hydrolysis fermentation jar (8) ferment and hydrolyze.

2. The activated sludge hydrolysis and fermentation carbon source supplementing device as claimed in claim 1, wherein the hydrolysis fermentation tank (8) comprises a tank body, and a stirrer (11) and a sludge distribution reflecting plate (10) which are arranged in the tank body, a deodorization pipe (17) for discharging gas in the tank body, a water outlet and a sludge inlet are arranged at the upper part of the tank body, and a cone hopper type sludge discharge pipe (15) is arranged at the bottom of the tank body.

3. The activated sludge hydrolysis and fermentation carbon source supplementing device as claimed in claim 1, wherein the hydrolysis fermentation tank (8) is further provided with a microwave antenna (13) therein, and the microwave antenna is connected with an external microwave generator (18).

4. The activated sludge hydrolysis and fermentation carbon source supplementing device as claimed in claim 1, wherein a DO monitor (14) is further arranged in the hydrolysis fermentation tank (8) and used for monitoring the content of dissolved oxygen in the tank in real time.

5. The activated sludge hydrolytic fermentation carbon source supplementing device as claimed in claim 1, wherein a sludge inlet tube (9) is additionally arranged, the central axes of the sludge inlet tube (9), the stirring shaft (111) of the stirrer (11) and the sludge distribution reflecting plate (10) are coincident, the sludge inlet tube (9) is positioned right above the sludge distribution reflecting plate (10), the sludge outlet of the sludge inlet tube faces the sludge distribution reflecting plate (10), and the sludge inlet pipe (7) extends into the tank and is communicated with the sludge inlet tube (9).

6. The activated sludge hydrolysis and fermentation carbon source supplementing device according to claim 5, wherein the sludge reflecting plate (10) is conical in outline.

7. The activated sludge hydrolysis fermentation carbon source supplementing device as claimed in claim 1, wherein a sludge flow rate adjusting device is arranged between the sludge pump (1) and the mixer (4).

8. The activated sludge hydrolysis and fermentation carbon source supplementing device as claimed in claim 7, wherein the sludge flow regulating device comprises an electromagnetic flow meter (3) and a control valve (2).

9. The activated sludge hydrolysis and fermentation carbon source supplementing device as claimed in claim 1, wherein the sludge inlet pipe (7) is further provided with a pH value on-line monitor (6) which is electrically connected with the chemical adding device and used for adjusting the adding amount of the chemical according to the pH value of the sludge.

10. The activated sludge hydrolysis and fermentation carbon source supplementing device as claimed in claim 1 or 9, wherein the dosing device comprises a dosing pump (5) and a dosing pipe, and the dosing pump is connected with the dosing port of the mixer (4) through the dosing pipe.