CN111285544A

CN111285544A - River sewage source treatment method

Info

Publication number: CN111285544A
Application number: CN202010104661.4A
Authority: CN
Inventors: 林志宏; 杨丽纯; 蔡泽嘉; 付裕
Original assignee: Shenzhen Hongda Construction Group Co Ltd
Current assignee: Shenzhen Hongda Construction Group Co Ltd
Priority date: 2020-02-20
Filing date: 2020-02-20
Publication date: 2020-06-16

Abstract

The invention relates to a method for treating river sewage sources, which comprises the following steps: step S1, respectively arranging sewage filters in the residential buildings which originally discharge sewage to the river channels directly, discharging the domestic sewage generated in the residential buildings into the corresponding sewage filters, and sequentially communicating all the sewage filters together through communicating pipelines; step S2: arranging a water suction pump in any one sewage filter, and pumping the sewage filtered in the sewage filter into the membrane bioreactor by the water suction pump; step S3: and discharging the sewage treated by the membrane bioreactor into a river channel. The sewage filter is communicated with the whole sewage filter, the whole volume is large, when a large amount of domestic sewage is discharged, the domestic sewage can be shared in each sewage filter, the domestic sewage overflowing condition is difficult to occur, only one powerful water suction pump needs to be used for pumping water, the installation and the control are more convenient to open and close, and the electric power resource and the installation cost are saved.

Description

River sewage source treatment method

Technical Field

The invention relates to the technical field of river channel treatment, in particular to a method for treating river channel sewage sources.

Background

China has wide range of members and numerous rivers, and numerous river channels are generated. A river is a route through which river water flows, and is generally referred to as a navigable waterway. However, with the acceleration of the urbanization process, the sewage discharge amount is greatly increased, and a large amount of sewage and domestic garbage are directly discharged into rivers, so that the pollution condition of the river channels is serious.

At present, chinese patent No. CN106517643A discloses a method for treating river sewage source, which comprises: (1) introducing sewage at a sewage discharge port in a river channel into a river underwater hidden well garbage collector through a pipeline, filtering suspended matters in the sewage, and adjusting the pH value of the sewage to 6-9 when the pH value of the sewage is out of the range of 5-10; (2) pumping the sewage treated in the step (1) into a membrane bioreactor, staying in the membrane bioreactor for 3-10 hours, and pumping the seepage and permeation membrane through a pump after biological treatment; (3) and (3) adsorbing the sewage treated in the step (2) by a resin adsorption system, resolving and regenerating the resin with saturated adsorption, and recycling, wherein the adsorbed effluent meets the discharge requirement.

The volume of a single underwater hidden well garbage collector is limited, when the garbage collector is in a water consumption peak period, the domestic sewage which flows into the underwater hidden well garbage collector is excessive, and even if a water pump pumps water all the time, the underwater hidden well garbage collector still can cause sewage overflow to pollute the environment. Therefore, when in actual use, a plurality of hidden well garbage collectors can be arranged to collect domestic drainage of part of users respectively, but due to the time interval of domestic sewage discharge and the uncontrollable discharge amount, part of the underwater hidden well garbage collectors are easy to collect a small amount of domestic sewage for a long time, and a corresponding water pump cannot be effectively used, so that the resource waste is caused.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a method for treating river sewage sources, which has the advantages of reasonably distributing resources and effectively reducing resource waste.

The above object of the present invention is achieved by the following technical solutions: a method for treating river sewage sources comprises the following steps:

step S1, respectively arranging sewage filters in the residential buildings which originally discharge sewage to the river channels directly, discharging domestic sewage generated in the residential buildings into the corresponding sewage filters to filter suspended matters, and sequentially communicating all the sewage filters together through communicating pipelines;

step S2: arranging a water suction pump in any one sewage filter, and pumping the sewage filtered in the sewage filter into the membrane bioreactor by the water suction pump;

step S3: and discharging the sewage treated by the membrane bioreactor into a river channel.

Through adopting above-mentioned technical scheme, sewage filter all communicates together, and its whole volume is big, and when a large amount of domestic sewage discharge appeared in arbitrary residential building, can distribute domestic sewage to every sewage filter, be difficult to appear the condition that domestic sewage spills over, and only need use a powerful suction pump to draw water, it is more convenient that installation and control are opened and close, saves electric power resource and installation cost.

The present invention in a preferred example may be further configured to: the sewage filter includes inner tube and urceolus, the urceolus is buried underground, the top of urceolus is equipped with flip, the inner tube interception is inside the upper end of urceolus, be connected with the drain pipe that is used for carrying domestic sewage on the inner tube, seted up a plurality of filtration pores on the inner tube, the connector has been seted up to the intercommunication pipeline on the lateral wall of urceolus, and the connector is close to the bottom of urceolus, the suction pump is in on the urceolus at the mouth that draws water of corresponding sewage filter, the bottom of urceolus is equipped with and is used for the accumulational settling zone of silt, the connector all locates in the.

Through adopting above-mentioned technical scheme, great suspended solid is intercepted in the inner tube in the domestic sewage, and in the domestic sewage less silt particle can assemble the settling zone under self action of gravity when sewage suspends to discharge into the sewage filter, makes the solid impurity content of being in the domestic sewage that is pumped by the suction pump few, reduces the condition that the suction pump is blockked up by solid impurity and appears, reduces the maintenance frequency.

The present invention in a preferred example may be further configured to: further comprising step S4: and (3) conveying the silt in the outer barrel into a sludge treatment device, discharging excessive sludge generated in the membrane bioreactor into the sludge treatment device, and removing organic matters in the sludge by the sludge treatment device.

Through adopting above-mentioned technical scheme, the workman clears up the accumulational silt of outer cylinder at an interval, because contain a large amount of organic matters in these silt, directly abandon the pollution that can cause the environment equally, consequently need handle together with the activated sludge that membrane bioreactor produced, makes the pollution that domestic sewage brought can obtain more comprehensive effectual improvement.

The present invention in a preferred example may be further configured to: the sludge treatment device comprises a primary digestion tank and a secondary digestion tank, sludge enters the secondary digestion tank after being treated by the primary digestion tank, a stirring device and a heating device are arranged in the primary digestion tank, and anaerobic environments are arranged in the primary digestion tank and the secondary digestion tank.

Through adopting above-mentioned technical scheme, the one-level digestion tank can make just collected mud mix with the original mud that originally contains a large amount of anaerobes fast and uniformly, makes the organic matter in the mud can be decomposed fast, and the movable mud can't be totally decomposed the organic matter and has been accomplished fully, consequently needs the second grade digestion tank to carry out the decomposition of stewing of two-stage to utilize mud to come from the one-level digestion tank in the second grade digestion tank together waste heat come to accelerate the reaction, reduce the waste of resource.

The present invention in a preferred example may be further configured to: the heating device comprises an electric heater, a combustion chamber and a water circulation assembly arranged around the primary digestion tank, wherein the electric heater and the combustion chamber both heat clean water in the water circulation assembly, and the heated clean water transfers heat to sludge in the primary digestion tank; biogas collecting devices are arranged in the first-stage digestion tank and the second-stage digestion tank, and biogas collected by the biogas collecting devices is conveyed to the combustion chamber to be combusted.

By adopting the technical scheme, the marsh gas generated by the sludge is used for burning in the combustion chamber to heat the sludge temperature in the primary digestion tank, the marsh gas is treated on site, the marsh gas is prevented from being transported remotely, the heating amount of the electric heater required to be burdened is reduced, and the use of electric energy is reduced.

The present invention in a preferred example may be further configured to: and an avoiding channel for a pipeline of the sludge pump to pass through is arranged between the inner cylinder and the outer cylinder.

Through adopting above-mentioned technical scheme, need not to take out the inner tube from the urceolus, just can stretch into the settling zone of urceolus through dodging the passageway with the suction dredge on the sludge pump, make things convenient for the workman to collect the mud in the urceolus, improve work efficiency.

The present invention in a preferred example may be further configured to: the end part of the water discharge pipe communicated with the inner cylinder faces to one side of the center of the inner cylinder, and the water discharge pipe is attached to the inner bottom surface of the inner cylinder.

Through adopting above-mentioned technical scheme, after the inner tube filters domestic sewage, the great impurity of volume can be intercepted in the inner tube, and partial impurity can block in the top of filtration pore, and when the drain pipe was discharged subsequent domestic sewage into the inner tube, domestic sewage can assault impurity, makes impurity be close to the inner wall of inner tube, reduces the possibility that the filtration pore was blocked, makes the filterability of inner tube obtain the guarantee.

The present invention in a preferred example may be further configured to: the inner tube comprises connecting portion and sliding part, be equipped with first recess on the connecting portion, be equipped with the second recess on the sliding part, the inner chamber of inner tube is constituteed jointly to first recess and second recess, sliding part both sides lateral wall sliding connection is on the both sides inner wall of first recess, the bottom sliding connection of sliding part is on the interior diapire of first recess, the sliding part is kept away from and is equipped with the through-hole that supplies the inlet tube to peg graft on the lateral wall of connecting portion, connecting portion detachably connects on the urceolus, be connected for dismantling equally between sliding part and the urceolus.

Through adopting above-mentioned technical scheme, be connected for dismantling between drain pipe and the inner tube, and when needing to open inner tube and drain pipe, remove the connection with the sliding part from the urceolus earlier, slide the sliding part to the one side of keeping away from the drain pipe again and break away from the drain pipe from the through-hole, separate connecting portion from the urceolus again to make connecting portion can take the sliding part to separate with drain pipe, urceolus together, conveniently wash the urceolus inner wall.

In summary, the invention includes at least one of the following beneficial technical effects:

the sewage filters are communicated together, so that the integral accommodation capacity of the domestic sewage is improved, the possibility of overflow of the domestic sewage from the sewage filters is reduced, the use number of the water suction pumps is greatly reduced, and the installation, maintenance and control of the water suction pumps are facilitated;

the sludge treatment device is arranged to treat the sludge generated in the domestic sewage treatment process, so that the occurrence of secondary pollution is reduced;

by arranging the biogas collecting device and the combustion chamber, the consumption of electric energy is reduced, and the biogas is conveniently treated.

Drawings

FIG. 1 is a flow chart of domestic sewage treatment in the example;

FIG. 2 is a schematic view showing the overall structure of the sewage filter according to the embodiment;

FIG. 3 is a side view of the sewage filter in the embodiment;

FIG. 4 is a schematic structural diagram of a primary digestion tank in the example.

In the figure, 1, a sewage filter; 11. an inner barrel; 111. a connecting portion; 1111. a first groove; 1112. a third groove; 1113. hooking; 112. a sliding part; 1121. a second groove; 1122. a through hole; 1123. a mortise lock; 12. an outer cylinder; 121. a cover is turned; 122. a socket; 123. a mounting seat; 2. a communicating pipe; 3. a membrane bioreactor; 4. a drain pipe; 5. a sludge treatment device; 51. a first-stage digestion tank; 511. a stirring device; 512. a heating device; 5121. an electric heater; 5122. a combustion chamber; 5123. a water circulation assembly; 52. a secondary digestion tank; 53. a biogas collection device; 6. a water pump; 61. a water pumping pipe.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention discloses a method for treating river sewage sources, which comprises the following steps:

and step S1, filtering suspended matters in the domestic sewage.

The sewage filters 1 are respectively arranged in the residential building which directly discharges sewage to the river channel originally, and domestic sewage generated in the residential building is directly discharged into the adjacent sewage filters 1 to filter suspended matters. Referring to fig. 1, adjacent sewage filters 1 are sequentially communicated together by a communication pipeline 2 along the flow direction of a river. The connecting position of the communicating pipe 2 on each sewage filter 1 is close to the same horizontal plane, so that the liquid level height in each sewage filter 1 is consistent as much as possible.

Step S2: a water suction pump 6 is arranged in any one sewage filter 1, and the water suction pump 6 pumps the sewage filtered in the sewage filter 1 into the membrane bioreactor 3.

Although any sewage filter 1 can be provided with a water suction pump 6, in order to save cost, a high-power water suction pump 6 can be arranged on the sewage filter 1 close to the membrane bioreactor 3. And a liquid level sensor is installed in the sewage filter 1 connected to the suction pump 6 to monitor the liquid level of the domestic sewage in the sewage filter 1. When the domestic sewage stored in the sewage filter 1 is not much, the water suction pump 6 does not pump water firstly, so that the water suction pump 6 is prevented from being started and stopped frequently. When the liquid level of the domestic sewage is increased to a certain height, the water pump 6 pumps water again. Because all sewage filters 1 are communicated together, the whole volume is large, even if domestic sewage discharge in partial areas is increased suddenly, the liquid level rising speed in the sewage filters 1 cannot be too high, and the water suction pump 6 has sufficient time to start. In addition, when the domestic sewage received in a few sewage filters 1 is small for a long time, the domestic sewage flowing through the other sewage filters 1 can flush the part of the domestic sewage, so that the situation that the domestic sewage stays in the sewage filters 1 due to lack of fluidity is avoided.

Referring to fig. 2, the sewage filter 1 includes an inner tub 11 and an outer tub 12.

Referring to fig. 2 and 3, the overall shape of the outer tub 12 is similar to a rectangular parallelepiped, an opening is opened on the top surface of the inner cavity of the outer tub 12, a flip cover 121 is hinged to the top of the outer tub 12, and the flip cover 121 covers the opening on the top of the outer tub 12 for a long time to reduce the odor of the domestic sewage from escaping. Most of the position of the outer tub 12 is buried under the ground, and only the top of the outer tub 12 and the lid 121 are exposed to the ground. The end of the drain pipe 4 for transporting the domestic sewage from the residential building, which is connected to the sewage filter 1, is also buried underground and is disposed perpendicular to the side wall of the outer tub 12, and the end of the drain pipe 4 penetrates into the outer tub 12 and is connected to the inner pipe. Two communicating pipes 2 that are connected with two adjacent sewage treatment wares are connected respectively on urceolus 12 is adjacent to two lateral walls of drain pipe 4, and communicating pipe 2 installs on the bottom lateral wall of urceolus 12, but and keep certain distance between the 12 bottom surfaces of urceolus, and the space between communicating pipe 2 and urceolus 12 ground is used for the accumulational settling zone of silt for urceolus 12, and the impurity that can pass through inner tube 11 in the domestic sewage is gathering easily after short-term the sediment and is forming mud in the settling zone. The suction pipe 61 of the suction pump 6 is also connected to the outer cylinder 12, and the position where the suction pipe 61 is connected to the outer cylinder 12 is at the same level as the position where the communication pipe 2 is connected to the outer cylinder 12. The inner wall of the outer cylinder 12 is provided with a plug socket 122 and a mounting seat 123 for fixing the inner cylinder 11, the plug socket 122 is mounted on the inner wall of the outer cylinder 12 on the side far away from the drain pipe 4, and the mounting seat 123 is mounted on the inner wall of the outer cylinder 12 on the same side as the drain pipe 4.

Referring to fig. 2 and 3, the inner cylinder 11 includes a connecting portion 111 and a sliding portion 112, the connecting portion 111 and the sliding portion 112 are similar to the outer cylinder 12 in shape, except that a side wall of one side of the connecting portion 111 is provided with a first groove 1111 communicating with an inner cavity thereof, and a side wall of one side of the sliding portion 112 is provided with a second groove 1121 communicating with an inner cavity thereof. The overall volume of the sliding portion 112 is slightly smaller than the connecting portion 111, the sliding portion 112 is slidably connected in the connecting portion 111, the outer bottom surface of the sliding portion 112 is in full contact with the inner bottom surface of the connecting portion 111, the outer side walls on two sides of the sliding portion 112 are in full contact with the inner side walls on two sides of the connecting portion 111, and the notches of the first groove 1111 and the second groove 1121 are oppositely arranged.

Referring to fig. 2 and 3, the bottom surfaces and the side walls near the bottom surfaces of the connecting portion 111 and the sliding portion 112 are respectively provided with a plurality of filtering holes, the side wall of the sliding portion 112 facing the notch of the second groove 1121 is provided with a through hole 1122 for inserting the water discharge pipe 4, and the side wall of the sliding portion 112 is provided with a plug pin adapted to the mounting seat 123 at a position above the through hole 1122. The outer side wall of the connecting portion 111 departing from the through hole 1122 is provided with a third groove 1112, the third groove 1112 is arranged along the height direction of the connecting portion 111, and hooks 1113 matched with the plug socket 122 are installed on two side positions of the third groove 1112.

In the process of installing the inner barrel 11 to the outer barrel 12, the sliding part 112 slides a small distance into the first groove 1111, and the connecting part 111 is hung on the socket 122 of the outer barrel 12 through the hook 1113, because of the existence of the third groove 1112, an avoiding channel for the pipe of the mud pump to pass through is formed between the connecting seat and the outer barrel 12. After the connecting seat is fixed in place, through-hole 1122 just faces drain pipe 4, slides slider 112 to drain pipe 4 one side, just can make drain pipe 4 insert in through-hole 1122, can set up the rubber pad at through-hole 1122 periphery on slider 112 inside wall, makes the rubber pad shelter from slightly to through-hole 1122, inserts the through-hole 1122 back when drain pipe 4, and the rubber pad can play the effect of sheltering from the space between drain pipe 4 and the through-hole 1122. The inner barrel 11 is then installed by securing the spigot to the mounting block 123.

Step S3: the sewage treated by the membrane bioreactor 3 is discharged into the river channel.

Step S4: the sludge treatment device 5 is used for removing organic matters in the sludge generated in the treatment process.

Referring to fig. 1, the silt removed from the sewage filter 1 is transferred to the sludge treatment apparatus 5, and the excess sludge generated in the membrane bioreactor 3 is also discharged into the sludge treatment apparatus 5,

the sludge treatment device 5 can be arranged near the membrane bioreactor 3 to reduce the length of a sludge discharge pipe arranged between the membrane bioreactor 3 and the sludge treatment device 5 and reduce the workload during maintenance and the cost during replacement.

Referring to fig. 1, the sludge treatment apparatus 5 includes a primary digester 51 and a secondary digester 52, and sludge generated from the membrane bioreactor 3 and the sewage filter 1 is treated by the primary digester 51 and then enters the secondary digester 52.

Referring to fig. 4, the open top of the primary digester 51 is blocked, so that an anaerobic environment lacking oxygen is formed in the primary digester 51, which is convenient for the survival of anaerobic bacteria and is helpful for decomposing organic matters in sludge. The organic matter is decomposed to produce methane mainly. The primary digester 51 is provided with a stirring device 511 for stirring the sludge and a heating device 512 for raising the temperature of the sludge. The heating device 512 comprises an electric heater 5121, a combustion chamber 5122 and a water circulation assembly 5123 arranged around the primary digestion tank 51, wherein the water circulation assembly 5123 is arranged around the primary digestion tank 51, the electric heater 5121 and the combustion chamber 5122 both heat local positions in the water circulation assembly 5123, and heat generated by the electric heater 5121 and the combustion chamber 5122 is transferred to sludge in the primary digestion tank 51 through a medium of clean water circulating in the water circulation assembly 5123. The reaction environment in the secondary digester 52 is anaerobic as in the primary digester 51, but the heating device 512 and the stirring device 511 are not provided in the secondary digester 52, and the sludge which has not completely reacted in the primary digester 51 enters the secondary digester 52 and then undergoes the next reaction by using the residual heat. Biogas collecting devices 53 are arranged at the tops of the primary digester 51 and the secondary digester 52, biogas collected in the two biogas collecting devices 53 is conveyed to the combustion chamber 5122 to be combusted, the power consumption of the electric heater 5121 is shared, and the cost for sludge treatment is reduced.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A method for treating river sewage sources is characterized by comprising the following steps: the method comprises the following steps:

step S1, respectively arranging sewage filters (1) in residential buildings which originally discharge sewage to river channels directly, discharging domestic sewage generated in the residential buildings into the corresponding sewage filters (1) to filter suspended matters, and sequentially communicating all the sewage filters (1) together through communicating pipelines (2);

step S2: a water suction pump (6) is arranged in any one sewage filter (1), and the water suction pump (6) pumps the sewage filtered in the sewage filter (1) into the membrane bioreactor (3);

step S3: the sewage treated by the membrane bioreactor (3) is discharged into a river channel.

2. The method for treating the river sewage source according to claim 1, wherein the method comprises the following steps: sewage filter (1) includes inner tube (11) and urceolus (12), urceolus (12) are buried underground, the top of urceolus (12) is equipped with flip (121), inner tube (11) intercept inside the upper end of urceolus (12), be connected with drain pipe (4) that are used for carrying domestic sewage on inner tube (11), seted up a plurality of filtration pores on inner tube (11), intercommunication pipeline (2) have seted up the connector on the lateral wall of urceolus (12), and the connector is close to the bottom of urceolus (12), suction pump (6) are in urceolus (12) at the mouth that draws water of corresponding sewage filter (1), the bottom of urceolus (12) is equipped with and is used for the accumulational settling zone of silt, urceolus and the mouth that draws water all locate in settling zone connector top.

3. The method for treating the river sewage source according to claim 2, wherein the method comprises the following steps: further comprising step S4: and (3) conveying the silt in the outer cylinder (12) into a sludge treatment device (5), discharging excessive sludge generated in the membrane bioreactor (3) into the sludge treatment device (5), and removing organic matters in the sludge by the sludge treatment device (5).

4. The method for treating the river sewage source according to claim 3, wherein the method comprises the following steps: the sludge treatment device (5) comprises a primary digestion tank (51) and a secondary digestion tank (52), sludge is treated by the primary digestion tank (51) and then enters the secondary digestion tank (52), a stirring device (511) and a heating device (512) are arranged in the primary digestion tank (51), and anaerobic environments are arranged in the primary digestion tank (51) and the secondary digestion tank (52).

5. The method for treating the river sewage source according to claim 4, wherein the method comprises the following steps: the heating device (512) comprises an electric heater (5121), a combustion chamber (5122) and a water circulation assembly (5123) arranged around the primary digestion tank (51), wherein the electric heater (5121) and the combustion chamber (5122) both heat clean water in the water circulation assembly (5123), and the heated clean water transfers heat to sludge in the primary digestion tank (51); biogas collecting devices (53) are arranged in the primary digestion tank (51) and the secondary digestion tank (52), and biogas collected in the biogas collecting devices (53) is conveyed to the combustion chamber (5122) for combustion.

6. The method for treating the river sewage source according to claim 2, wherein the method comprises the following steps: an avoiding channel for a pipeline of the sludge pump to pass through is arranged between the inner cylinder (11) and the outer cylinder (12).

7. The method for treating the river sewage source according to claim 2, wherein the method comprises the following steps: the end part of the drain pipe (4) communicated with the inner cylinder (11) faces to one side of the center of the inner cylinder (11), and the drain pipe (4) is attached to the inner bottom surface of the inner cylinder (11).

8. The method for treating the source of river sewage according to claim 7, wherein the method comprises the following steps: inner tube (11) comprise connecting portion (111) and sliding part (112), be equipped with first recess (1111) on connecting portion (111), be equipped with second recess (1121) on sliding part (112), the inner chamber of inner tube (11) is constituteed jointly to first recess (1111) and second recess (1121), sliding part (112) both sides lateral wall sliding connection is on the both sides inner wall of first recess (1111), the bottom sliding connection of sliding part (112) is on the interior diapire of first recess (1111), sliding part (112) are kept away from and are equipped with through-hole (1122) that supply the inlet tube to peg graft on the lateral wall of connecting portion (111), connecting portion (111) detachably connects on urceolus (12), be connected for dismantling between sliding part (112) and urceolus (12) equally.