CN109592844A - A kind of cleaning method of sewage disposal system - Google Patents
A kind of cleaning method of sewage disposal system Download PDFInfo
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- CN109592844A CN109592844A CN201811355539.3A CN201811355539A CN109592844A CN 109592844 A CN109592844 A CN 109592844A CN 201811355539 A CN201811355539 A CN 201811355539A CN 109592844 A CN109592844 A CN 109592844A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B5/00—Cleaning by methods involving the use of air flow or gas flow
- B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The present invention provides a kind of cleaning methods of sewage disposal system.In the cleaning method of sewage disposal system, sewage disposal system includes the first order processing unit and second level processing unit to communicate with each other, which includes: the water level monitored in first order processing unit；When the water level in first order processing unit reaches absolute altitude L1When, second level processing unit is cleaned.Apply the technical scheme of the present invention, solve the problems, such as in the prior art to sewage disposal system it is excessive flushing or flushing not in time.Filter clogging or hardened is avoided, while saving energy consumption and water resource.
Description
Technical field
The present invention relates to sewage treatment fields, in particular to a kind of cleaning method of sewage disposal system.
Background technique
In recent years, environmental pollution by water problem protrudes year by year, constrains the sustainable development of the economy and ecology of China.To administer
Water pollution, all trades and professions are widely used sewage disposal device at home, and current many large enterprises are living area
It is configured with domestic sewage treatment device.Water l oad having time week of enterprise's domestic sewage processing system compared with urban wastewater treatment firm etc.
It is not known in phase, unbalanced feature, so needing the stronger sewage disposal system of adaptability.It is handled using biofilm dirty
The process of water is widely applied in recent years.
But during using biofilm, the problems such as due to the aging of biomembrane periodicity, filter clogging, system is hindered
The process performance of system, it is therefore desirable to which the biomembrane in sewage disposal system is rinsed.What sewage disposal system generallyd use
It is traditional auto-flushing control method.This method often carries out air water joint to biomembrane according to the time cycle and rinses.
A kind of sewage disposal system is provided in the prior art comprising the primary grid well being arranged in container,
Biochemical reaction tank, filtration system, cleaning system and control system, and wherein separated between all parts with partition, each portion
Part is connected to by valve pipe fitting, and control system is electrically connected with filtration system and cleaning system respectively.System is stated in use
During, only by determining flow filtration sewage, therefore use the cleaning way using the set time as the period.But enterprise
Interior sanitary sewage load is distributed extremely inequality over a period of time, therefore the blocking period of sewage disposal system is difficult to determine,
Often resulting in biomembrane when actual motion and excessively rinsing or rinse causes filter clogging even hardened not in time, influences sewage treatment
The processing capacity of system, and increase the operation energy consumption of sewage disposal system when excessive flushing.
Summary of the invention
The main purpose of the present invention is to provide a kind of cleaning methods of sewage disposal system, in the prior art to solve
The problem of sewage disposal system is excessively rinsed or is rinsed not in time.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of cleaning side of sewage disposal system
Method, sewage disposal system include the first order processing unit and second level processing unit to communicate with each other, and cleaning method includes: monitoring
Water level in first order processing unit；When the water level in first order processing unit reaches absolute altitude L1When, to second level processing unit
It is cleaned.
Further, in the cleaning method of above-mentioned sewage disposal system, sewage disposal system further include: at the second level
The third level processing unit of device connection is managed, cleaning method further comprises: the water level in monitoring second level processing unit；When
Water level in two stage treatment device reaches absolute altitude L2When, third level processing unit is cleaned.
Further, in the cleaning method of above-mentioned sewage disposal system, first order processing unit is provided with the first overflow
Weir, absolute altitude L1Mark line be arranged on the first overflow weir.
Further, in the cleaning method of above-mentioned sewage disposal system, first order processing unit is provided with the first overflow
Weir, second level processing unit are provided with the second overflow weir, and absolute altitude L1Mark line be arranged on the first overflow weir, absolute altitude L2
Mark line be arranged on the second overflow weir.
Further, in the cleaning method of above-mentioned sewage disposal system, first order processing unit is primary sedimentation tank.
Further, in the cleaning method of above-mentioned sewage disposal system, second level processing unit is denitrification pond or nitre
Change pond.
Further, in the cleaning method of above-mentioned sewage disposal system, second level processing unit is denitrification pond, third
Grade processing unit is nitrification tank.
Further, in the cleaning method of above-mentioned sewage disposal system, using following steps to second level processing unit
It is cleaned: with 0.3~0.5L/s/m2Air douche 5~7 minutes；With 0.2~0.4L/s/m2Air and 1.5~2.5 times
The water joint of flow of inlet water is rinsed 3~5 minutes；And it is rinsed 3~5 minutes with the water of 2~3 times of flow of inlet water.
Further, in the cleaning method of above-mentioned sewage disposal system, using following steps to third level processing unit
It is cleaned: with 0.3~0.5L/s/m2Air douche 5~7 minutes；With 0.2~0.4L/s/m2Air and 1.5~2.5 times
The water joint of flow of inlet water is rinsed 3~5 minutes；And it is rinsed 3~5 minutes with the water of 2~3 times of flow of inlet water.
Further, in the cleaning method of above-mentioned sewage disposal system, denitrification is provided in pond including anaerobic bacteria
Biomembrane, anaerobic bacteria includes denitrification achromobacter (Achromobacter denitrificans), denitrification micrococcus luteus
(Micrococcus denitrificans), denitrifying pseudomonas (Pseudomonas denitrificans), fluorescence are false
Monad (Pseudomonas fluorescens), denitrification color bacillus (Chromobacterium denitrificans) and
Chromobacterium violaceum (Chromobacterium violaceum)；It is preferred that the biomembrane including aerobic bacteria is provided in nitrification tank,
Aerobic bacteria is originated from Nitrobacter (Nitrobacter), Nitrospina (Nitrospina), Nitrococcus
(Nitrococcus), Nitromonas (Nitrosomonas), Nitrosospira (Nitrosospira), nitrosation
Coccus (Nitrosococcus) and Nitrosolobus (Nitrosolobus).
Apply the technical scheme of the present invention, solve in the prior art to sewage disposal system it is excessive flushing or flushing not
Timely problem.Filter clogging or hardened is avoided, while saving energy consumption and water resource.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
By the description in background technique it can be appreciated that sewage disposal system in the prior art is using with fixation
Time is the cleaning way in period, and which can be applied only to the sanitary sewage that sewage load is evenly distributed over a period of time
Processing.But this method is difficult to solve sewage load in enterprise and is distributed extremely unequal, sewage treatment system over a period of time
The blocking period of system is difficult to determine the problem of bring is excessively rinsed or rinsed not in time to biomembrane.For asking in the prior art
Topic, one according to the present invention typically embodiment there is provided a kind of cleaning methods of sewage disposal system, wherein the sewage
Processing system includes the first order processing unit and second level processing unit to communicate with each other, and the cleaning method includes: monitoring
Water level in first order processing unit；When the water level in first order processing unit reaches absolute altitude L1When, to second level processing unit
It is cleaned.
Different from the prior art, the cleaning way of Time-Dependent is not used in cleaning method of the invention.In the present invention
Embodiment in, the sewage disposal system that the present invention uses includes first order processing unit and second level processing unit, wherein
First order processing unit and second level processing unit are in fluid communication with each other, and the connection sequence of the two is not particularly limited, is
So that those skilled in the art is more fully understood the technical solution of the application, the embodiment of different connection sequences is divided below
It does not mentionlet alone bright.
In one embodiment of the invention, wherein first order processing unit is located at the upstream of second level processing unit.?
Before carrying out method of the invention, the absolute altitude L in first order processing unit should be first determined1, that is, the mark line of critical processing water level.
Since the insoluble impurities in the processing unit of the second level can be attached to wall, bottom, water inlet and the biomembrane of such as processing unit
On, passing through for water flow will be blocked, so that the water level liter in the first processing unit being in fluid communication with second level processing unit
It is high.Therefore, the water level in first order processing unit increases the heap that can directly show insoluble impurities in the processing unit of the second level
Cumuliformis state.When using sewage disposal system for the first time, determine that the maximum of second level processing unit is held by the method for periodic observation
The state of insoluble impurities is carried, and determines the absolute altitude L of first order processing unit in this state1.Using method of the invention
When, the water level in first order processing unit is monitored first.During monitoring, it can be observed using naked-eye observation or sensor
Mode.By observation, it can determine whether the water level in first order processing unit reaches absolute altitude L1, and according to the height of water level
Take corresponding step.When monitoring that water level in first order processing unit reaches absolute altitude L1When, illustrate second level processing unit
In be deposited in the insoluble impurities of processing unit and have reached critical value, and as cleaned not in time, then may cause the first order
Fluid communication between processing unit and second level processing unit is blocked completely or biomembrane is completely plugged, to occur the
The problem of sewage overflows or second level processing unit lose filter capacity in coagulation device.Therefore in first order processing unit
In water level reach absolute altitude L1In the case where, second level processing unit is cleaned immediately.By means of the invention it is also possible to
In the case that sanitary sewage load is unevenly distributed over a period of time in enterprise, only pass through the water level in first order processing unit
With absolute altitude L1Relationship determine scavenging period.To solve the excessive flushing or punching to sewage disposal system in the prior art
The problem of washing not in time.And filter clogging or hardened is avoided, while saving energy consumption and water resource.
Absolute altitude L1The distance between corresponding mark line and water outlet size are related with specific equipment or system.According to mesh
The specification of preceding common sewage disposal system, the mark line of critical processing water level can be set apart from water outlet 5cm to 8cm's
In range.When the water level in first order processing unit reaches absolute altitude L1When, the alarm of filter tank differential pressure height, and auto-flushing second
Grade processing unit, is preferably arranged multiple mark lines in the altitude range apart from water outlet 5cm to 8cm, when water level reaches 5cm's
Start to alarm when mark line, starts to rinse when water level reaches the mark line of 8cm.
In another embodiment, second level processing unit is located at the upstream of first order processing unit.When second processing fills
The insoluble impurities set is deposited in when causing to be in fluid communication obstructed on wall, bottom, water inlet and the biomembrane of device, is flow to
The amount of sewage in first order processing unit will be reduced, so that the water level decreasing of first order processing unit.Therefore in this reality
It applies in example, the water level decreasing in first order processing unit can directly show the accumulation of insoluble impurities in the processing unit of the second level
State.When using sewage disposal system for the first time, determine that the maximum of second level processing unit carries by the method for periodic observation
The state of insoluble impurities, and the absolute altitude L of first order processing unit is determined in this state1.Determining first order processing unit
Absolute altitude L1Later, method of the invention can be used in the normal state.When using method of the invention, monitor first
Water level in first order processing unit.It, can be by the way of naked-eye observation or sensor observation during monitoring.Pass through
Observation, can determine whether the water level in first order processing unit reaches absolute altitude L1, and taken accordingly according to the height of water level
Step.When monitoring that water level in first order processing unit reaches absolute altitude L1When, illustrate to be deposited in place in the processing unit of the second level
It manages insoluble impurities on wall, bottom, water inlet and the biomembrane of device and has reached critical value.And if cleaned not in time, then
It may cause that fluid communication between first order processing unit and second level processing unit is blocked completely or biomembrane is completely stifled
Plug, to the problem of sewage overflows or second level processing unit lose filter capacity in the processing unit of the second level occur.Pass through this
The method of embodiment, can also it is good solution in the prior art to sewage disposal system it is excessive flushing or rinse not in time
The problem of.
To sum up, cleaning method of the invention solve in the prior art to sewage disposal system it is excessive flushing or flushing not
Timely problem.Filter clogging or hardened is avoided, while saving energy consumption and water resource.
In a preferred embodiment of the invention, sewage disposal system further includes being connected to the third level with second level processing unit
Processing unit, and cleaning method of the invention further comprises the water level monitored in the processing unit of the second level；At the second level
The water level managed in device reaches absolute altitude L2When, third level processing unit is cleaned.In one embodiment, sewage treatment
System includes the first order processing unit, second level processing unit and third level processing unit being sequentially communicated along water (flow) direction.It can
To pass through the water level in monitoring first order processing unit, and monitoring the water level arrival absolute altitude L in first order processing unit1
When, clean second level processing unit；Simultaneously can be by the water level in detection second level processing unit, and monitoring second
Water level in grade processing unit reaches absolute altitude L2When, clean third level processing unit.Therefore in the method using present embodiment
In the case of, not only solve excessive the problem of rinsing or rinsing not in time in the prior art to sewage disposal system, Er Qieke
To monitor simultaneously and clean two different processing units, to further save energy consumption and water resource.For absolute altitude L2It is right
The distance between the mark line and water outlet answered size with described previously for absolute altitude L1Description it is identical.
In yet another embodiment of the present invention, sewage disposal system includes the third level being sequentially communicated along water (flow) direction
Processing unit, second level processing unit, first order processing unit.By being located at first order processing with second level processing unit above
Identical mode in the embodiment of the upstream of device, before using method of the invention, it is first determined first order processing unit
In absolute altitude L1And the absolute altitude L in the processing unit of the second level2.Then the tertiary treatment device phase that can be used and be described above
Same method carries out the cleaning to sewage disposal system.The method of present embodiment equally can solve it is right in the prior art
Excessive the problem of rinsing or rinsing not in time of sewage disposal system, simultaneously, further saves energy consumption and water resource.
In one embodiment of the invention, the first order processing unit being described above is provided with the first overflow weir, and
Absolute altitude L1Mark line be arranged on the first overflow weir.In the present embodiment for including the first overflow weir, untreated sewage is first
It is introduced into the lower part of first order processing unit, after being handled in first order processing unit, sewage is filled from first order processing
The top set overflows in the first overflow weir.Then under gravity, sewage flows into from the first overflow weir and flows into the second level
The lower part of processing unit.When carrying out the method for the present embodiment, the absolute altitude L in the first overflow weir should be first confirmd that1, that is, it is critical
Handle the mark line of water level.Since the insoluble impurities in the processing unit of the second level can be attached to wall, the bottom of such as processing unit
On portion, water inlet and biomembrane, passing through for water flow will be blocked, so that overflowing with second level processing unit is in fluid communication first
The water level flowed in weir increases.Therefore, the water level raising in the first overflow weir can directly show insoluble in the processing unit of the second level
The stacking states of property impurity.When using sewage disposal system for the first time, processing dress in the second level is determined by the method for periodic observation
The state for the maximum carrying insoluble impurities set, and the absolute altitude L of the first overflow weir is determined in this state1.Using this implementation
When the method for example, the water level in the first overflow weir is monitored first.During monitoring, naked-eye observation or sensor can be used
The mode of observation.By observation, it can determine whether the water level in the first overflow weir reaches absolute altitude L1, and according to the height of water level
Take corresponding step.When monitoring that water level in the first overflow weir reaches absolute altitude L1When, illustrate heap in the processing unit of the second level
Product has reached critical value in the insoluble impurities of processing unit, and as cleaned not in time, then may cause the first overflow weir
Fluid communication between the processing unit of the second level is blocked completely or biomembrane is completely plugged, to the first overflow weir occur
The problem of middle sewage overflows or second level processing unit lose filter capacity.Therefore the water level in the first overflow weir reaches absolute altitude
L1In the case where, second level processing unit is cleaned immediately.Method through this embodiment, can live dirt in enterprise
In the case that Water l oad is unevenly distributed over a period of time, only pass through the water level and absolute altitude L in the first overflow weir1Relationship come it is true
Determine scavenging period.So that be easier to carry out observing and judge whether in enterprise's sewage treatment reply sewage-treatment plant into
Row cleaning.Further, since the method for observing absolute altitude and water level in overflow weir has been used, it is achieved that making liquid Uniform Flow
And sensitively measure the effect of water level and absolute altitude.
Absolute altitude L1The distance between corresponding mark line and overflow weir bottom size are related with specific equipment or system.It presses
According to the specification of currently used sewage disposal system, the mark line of critical processing water level be can be set apart from overflow weir bottom
In the range of 5cm to 8cm, wherein overflow weir water outlet is located at overflow weir bottom.When the water level in the first overflow weir is to up to standard
High L1When, the alarm of filter tank differential pressure height, and auto-flushing second level processing unit, preferably in the height apart from water outlet 5cm to 8cm
The multiple mark lines of setting in range are spent, start to alarm when water level reaches the mark line of 5cm, when water level reaches the mark line of 8cm
When start to rinse.
In another embodiment for including overflow weir, first order processing unit includes the first overflow weir and the second level is handled
Device includes the second overflow weir, and the cleaning method of sewage disposal system includes: the water level monitored in the first overflow weir；When
Water level in one overflow weir reaches absolute altitude L1When, second level processing unit is cleaned；Meanwhile it monitoring in the second overflow weir
Water level；When the water level in the second overflow weir reaches absolute altitude L2When, third level processing unit is cleaned.With upper one embodiment
Identical, untreated sewage initially enters the lower part of first order processing unit, after being handled in first order processing unit,
The top of sewage from first order processing unit overflows in the first overflow weir.Then under gravity, sewage is flowed into from the
The lower part of one overflow weir inflow second level processing unit.It, will be certainly and in sewage after the processing of second level processing unit
The top of second level processing unit enters in the second overflow weir.Then under gravity, sewage is flowed into from the second overflow weir
Flow into the lower part of third level processing unit.When carrying out the method for the present embodiment, in addition to the absolute altitude L in the first overflow weir of confirmation1
Outside, it should also confirm the absolute altitude L in the second overflow weir2.It is true by the method for periodic observation when using sewage disposal system for the first time
Determine the state of the maximum carrying insoluble impurities of third level processing unit, and determines the absolute altitude of the second overflow weir in this state
L2.In the method for application the present embodiment, L can be simultaneously or separately detected1And L2, so that it is determined that second level processing unit and
The case where tertiary treatment device.And then can in the case that sanitary sewage load is unevenly distributed over a period of time in enterprise,
Only pass through the water level and absolute altitude L in the first overflow weir1Relationship and water level and absolute altitude L in the second overflow weir2Relationship come it is true
Determine scavenging period.So that be easier to carry out observing and judge whether in enterprise's sewage treatment reply sewage-treatment plant into
Row cleaning.Further, since the method for observing absolute altitude and water level in overflow weir has been used, it is achieved that making liquid Uniform Flow
And sensitively measure the effect of water level and absolute altitude.For absolute altitude L2The distance between corresponding mark line and water outlet size with
Described previously for absolute altitude L1Description it is identical.
In embodiments of the present invention, the form of various overflow weirs used in water treatment field can be used, including
But it is not limited to: broad-crested weir, chord-type weir, practical weir, hump weir and fold-line-shaped weir, and wherein it is preferable to use broad-crested weirs.In addition, can
To use any method setting overflow weir known in the art, and it is not particularly limited.
In a preferred embodiment of the invention, first order processing unit is primary sedimentation tank.Inclined plate is provided in primary sedimentation tank.
After sewage enters primary sedimentation tank by pipeline, first by inclined plate, and the sludge in sewage will be precipitated on inclined plate under in, and
Drained by mud valve.Other than sludge, primary sedimentation tank can also remove other sinkers and floating material in sewage, to subtract
The light load of other subsequent processing facilities including second level processing unit and/or third level processing unit.Also, by oblique
The effect of plate, so that the lesser floccule of the partial size for including in sewage forms biggish particle, to enhance in primary sedimentation tank
The effect of separation of solid and liquid.Further, it is also possible to iron-containing coagulant be added in primary sedimentation tank, to play the effect of reinforced phosphor-removing.
In the further embodiment of method of the invention, second level processing unit is denitrification pond or nitrification tank.
After removing the biggish sludge of degranulation by primary sedimentation tank, sewage is entered in the processing unit of the second level.Second level processing unit
It can be denitrification pond or nitrification tank.In the case that in the second level, processing unit is denitrification pond, sewage carries out anti-nitre wherein
Change effect, thus by the nitrate reduction in sewage under the action of denitrifying bacterium, to discharge nitrogen or nitrous oxide.?
In the case that two stage treatment device is nitrification tank, sewage carries out nitrification wherein, thus will be dirty under the action of nitrifier
Ammonia in water is converted into nitric acid.When sewage flows through nitrification tank and denitrification pond, the height of the filtrate on biomembrane is on the one hand utilized
The oxidative degradation ability of specific surface area bring high-concentration biological film can decompose the ammonia and nitrogen organic in sewage, on the other hand utilize
The biological flocculation of the lesser feature of particle diameter of filter medium and biomembrane can retain the suspended matter in sewage, make sewage quick purifying.
Since what is be all made of in nitrification tank or denitrification pond is that corresponding bacterial biof iotalm is arranged in the processing unit of the second level
Mode, therefore method of the invention can be effectively applied to nitrification tank and denitrification pond.When using method of the invention, when
When the critical state that biomembrane is blocked by insoluble impurity, first order processing unit reaches absolute altitude L1.It is clear immediately in this case
The biomembrane washed in the processing unit of the second level may insure that biomembrane keeps activity, and improve quality of water treatment.
In the embodiment for the tertiary treatment device being described above, second level processing unit is denitrification pond, the third level
Processing unit is nitrification tank.In certain embodiments of the present invention, denitrification pond and nitrification tank can be used simultaneously, thus into
One step filter sewage.Using method of the invention, denitrification pond can be kept when using sewage disposal system
It is in high activity with the biomembrane in nitrification tank, to handle sewage to the greatest extent.In this case, what is avoided is laggard
The water treatment steps of one step, to save the cost of sewage treatment.
In the cleaning method of sewage disposal system of the invention, second level processing unit is carried out using following steps clear
It washes: with 0.3~0.5L/s/m2Air douche 5~7 minutes；With 0.2~0.4L/s/m2Air and 1.5~2.5 times of feed water flows
The water joint of amount is rinsed 3~5 minutes；And it is rinsed 3~5 minutes with the water of 2~3 times of flow of inlet water.In above-mentioned numberical range,
The insoluble impurity that can be effectively removed on the wall for being deposited in processing unit, bottom, water inlet and biomembrane.Preferably, make
Biomembrane is cleaned with above-mentioned cleaning step.Since biomembrane is using the form of the lesser granular biofilter material of partial size,
It is easier to accumulate insoluble impurities on its surface after for a period of time in processing sewage.It can be more effective using above-mentioned cleaning method
The impurity blocked in filtrate is removed on ground, and is mitigated the aging of biomembrane, discharge the suspended matter of retention and updated biomembrane.
In the embodiment of tertiary treatment device of the invention, third level processing unit is carried out using following steps clear
It washes: with 0.3~0.5L/s/m2Air douche 5~7 minutes；With 0.2~0.4L/s/m2Air and 1.5~2.5 times of feed water flows
The water joint of amount is rinsed 3~5 minutes；And it is rinsed 3~5 minutes with the water of 2~3 times of flow of inlet water.In tertiary treatment device
In embodiment, second level processing unit and third level processing unit can sequentially or simultaneously be cleaned using above-mentioned cleaning way,
To effectively remove the impurity blocked in filtrate, and mitigate the aging of biomembrane, discharges the suspended matter of retention and more neoformation
Film.
In a preferred embodiment of the invention, it is provided with the biomembrane including anaerobic bacteria in denitrification pond, the anaerobism
Bacterium includes denitrification achromobacter (Achromobacter denitrificans), denitrification micrococcus luteus (Micrococcus
Denitrificans), denitrifying pseudomonas (Pseudomonas denitrificans), Pseudomonas fluorescens
(Pseudomonas fluorescens), denitrification color bacillus (Chromobacterium denitrificans) and purple color
Bacillus (Chromobacterium violaceum).In denitrification pond, above-mentioned anaerobic bacteria is reacted as follows:
C6H12O6+12NO3 -→6H20+6CO2+12NO2 -+ energy；
5COH3COOH+8NO3 -→6H2O+10CO2+4N2+8OH-+ energy.
In the case where stating anaerobic bacteria in use, denitrification pond can effectively be converted the nitrate ion in sewage
For nitrogen, to achieve the effect that purify sewage.But due to producing hydroxide ion in above-mentioned reaction, in sewage
In comprising being easy to produce flocculent deposit not soluble in water, and be gathered in life in iron ion, copper ion and aluminum ions situation
The water purification ability of biomembrane is reduced on object film.Using method of the invention, can effectively it live in enterprise
In the case that sewage load is unevenly distributed over a period of time, avoiding makes biofilm inactivation as caused by rinsing not in time
The problem of.Further, since timely being rinsed, the long-term effectiveness of biomembrane ensure that, so that the purification of sewage can be with
Permanently effective progress.
In a preferred embodiment of the invention, the biomembrane including aerobic bacteria is provided in nitrification tank, this is aerobic thin
Bacterium source from Nitrobacter (Nitrobacter), Nitrospina (Nitrospina), Nitrococcus (Nitrococcus),
Nitromonas (Nitrosomonas), Nitrosospira (Nitrosospira), Nitrosococcus
(Nitrosococcus) and Nitrosolobus (Nitrosolobus).In nitrification tank, above-mentioned aerobic bacteria carries out following anti-
It answers:
2NH3+3O2→2HNO2+2H2O+ energy；
2HNO2+O2→HNO3+ energy.
In the case where stating anaerobic bacteria in use, denitrification pond effectively can convert nitric acid for the ammonia in sewage,
To achieve the effect that purify sewage.But due to producing nitrate ion in above-mentioned reaction, include in sewage
In the case where machine object such as alcohol, esterification is easy to happen to generate oily mater not soluble in water.The oily mater can block
The hole of biomembrane, to reduce the water purification ability of biomembrane.Using method of the invention, can effectively it exist
In the case that sanitary sewage load is unevenly distributed over a period of time in enterprise, avoiding is made as caused by rinsing not in time
The problem of biofilm inactivation.Further, since timely being rinsed, the long-term effectiveness of biomembrane ensure that, so that sewage
Purification can be permanently effective progress.
Below with reference to embodiment and comparative example, the beneficial effect of the application is further illustrated.
Embodiment 1
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond.It uses
Level monitoring device monitors the water level in primary sedimentation tank, wherein absolute altitude L1It is arranged at primary sedimentation tank water outlet 5cm.It is detecting
Water level and absolute altitude L in primary sedimentation tank1When identical, stop the sewage transport into primary sedimentation tank, and cleans the pond in denitrification filter pool
Wall, bottom of pond, biomembrane and denitrification filter pool sewage inlet, cleaning way is as follows: with 0.3L/s/m2Air douche 7 minutes；
With 0.2L/s/m2Air and the water joints of 2.5 times of flow of inlet water rinse 5 minutes；And 5 are rinsed with the water of 2 times of flow of inlet water
Minute.After cleaning, restore the sewage transport into primary sedimentation tank.
Embodiment 2
Using the sewage disposal system including primary sedimentation tank and nitrification tank, primary sedimentation tank is located at the upstream of nitrification tank.Use electronics
Monitoring device monitors the water level in primary sedimentation tank, wherein absolute altitude L1It is arranged at primary sedimentation tank water outlet 6cm.It is just heavy detecting
Water level and absolute altitude L in pond1When identical, stop the sewage transport into primary sedimentation tank, and cleans the pool wall in nitrification filter tank, pond
Bottom, biomembrane and the sewage inlet for nitrifying filter tank, cleaning way are as follows: with 0.5L/s/m2Air douche 5 minutes；With 0.4L/
s/m2Air and the water joints of 1.5 times of flow of inlet water rinse 3 minutes；And it is rinsed 3 minutes with the water of 3 times of flow of inlet water.Clearly
After washing, restore the sewage transport into primary sedimentation tank.
Embodiment 3
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond.It uses
Electronic monitoring device monitors the water level in primary sedimentation tank, wherein absolute altitude L1It is arranged at primary sedimentation tank water outlet 7cm.It is detecting
Water level and absolute altitude L in primary sedimentation tank1When identical, stop the sewage transport into primary sedimentation tank, and cleans the pond in denitrification filter pool
Wall, bottom of pond, biomembrane and denitrification filter pool sewage inlet, cleaning way is as follows: with 0.4L/s/m2Air douche 6 minutes；
With 0.3L/s/m2Air and the water joints of 2 times of flow of inlet water rinse 4 minutes；And 4 are rinsed with the water of 2.5 times of flow of inlet water
Minute.After cleaning, restore the sewage transport into primary sedimentation tank.
Embodiment 4
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond.The water level in primary sedimentation tank is monitored using electronic monitoring device, wherein absolute altitude L1Setting
At primary sedimentation tank water outlet 5cm, and at the same time the water level in monitoring denitrification pond, wherein absolute altitude L2It is arranged apart from denitrification
At the water outlet 8cm of pond.Detecting the water level in primary sedimentation tank and absolute altitude L1When identical, stop the sewage transport into primary sedimentation tank,
And the sewage inlet of the pool wall in denitrification filter pool, bottom of pond, biomembrane and denitrification filter pool is cleaned, cleaning way is as follows: with
0.4L/s/m2Air douche 6 minutes；With 0.3L/s/m2Air and the water joints of 2 times of flow of inlet water rinse 4 minutes；And
It is rinsed 4 minutes with the water of 2.5 times of flow of inlet water.After cleaning, restore the sewage transport into primary sedimentation tank.Detecting denitrification pond
In water level and absolute altitude L2When identical, stop the sewage transport into primary sedimentation tank, and clean nitrification filter tank in pool wall, bottom of pond,
The sewage inlet of biomembrane and denitrification filter pool, cleaning way are as follows: with 0.4L/s/m2Air douche 6 minutes；With 0.3L/
s/m2Air and the water joints of 2 times of flow of inlet water rinse 4 minutes；And it is rinsed 4 minutes with the water of 2.5 times of flow of inlet water.Clearly
After washing, restore the sewage transport into primary sedimentation tank.
Embodiment 5
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond, wherein
Primary sedimentation tank includes the first overflow weir.The water level of the first overflow weir is monitored using level monitoring device, wherein absolute altitude L1Setting away from
At the first overflow weir bottom 8cm.Detecting the water level in the first overflow weir and absolute altitude L1When identical, stop into primary sedimentation tank
Sewage transport, and clean the sewage inlet of the pool wall in denitrification filter pool, bottom of pond, biomembrane and denitrification filter pool, cleaning side
Formula is as follows: with 0.3L/s/m2Air douche 7 minutes；With 0.2L/s/m2Air and the water of 2.5 times of flow of inlet water combine and rinse
5 minutes；And it is rinsed 5 minutes with the water of 2 times of flow of inlet water.After cleaning, restore the sewage transport into primary sedimentation tank.
Embodiment 6
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond, wherein primary sedimentation tank includes the first overflow weir and denitrification pond includes the second overflow
Weir.The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1It is arranged in the first overflow weir of distance bottom
At 7cm, and at the same time the water level of the second overflow weir of monitoring, wherein absolute altitude L2It is arranged at the second overflow weir of distance bottom 5cm.?
Detect the water level and absolute altitude L in the first overflow weir1When identical, stop the sewage transport into primary sedimentation tank, and clean denitrification
The sewage inlet of pool wall, bottom of pond, biomembrane and denitrification filter pool in filter tank, cleaning way are as follows: with 0.4L/s/m2Air
It rinses 6 minutes；With 0.3L/s/m2Air and the water joints of 2 times of flow of inlet water rinse 4 minutes；And with 2.5 times of flow of inlet water
Water rinse 4 minutes.After cleaning, restore the sewage transport into primary sedimentation tank.Detecting the water level and in the second overflow weir
The absolute altitude L of two overflow weirs2When identical, stop the sewage transport into primary sedimentation tank, and clean nitrification filter tank in pool wall, bottom of pond,
The sewage inlet of biomembrane and denitrification filter pool, cleaning way are as follows: with 0.4L/s/m2Air douche 6 minutes；With 0.3L/
s/m2Air and the water joints of 2 times of flow of inlet water rinse 4 minutes；And it is rinsed 4 minutes with the water of 2.5 times of flow of inlet water.Clearly
After washing, restore the sewage transport into primary sedimentation tank.
EXPERIMENTAL EXAMPLE
Embodiment 7
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond.It uses
Electronic monitoring device monitors the water level in primary sedimentation tank, wherein absolute altitude L1It is arranged at primary sedimentation tank water outlet 5cm.Work as primary sedimentation tank
Water level be lower than absolute altitude L1When, stop the sewage transport into primary sedimentation tank, and the biomembrane taken out in denitrification pond is observed.
As a result it shows in table 1.
Embodiment 8
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond.It uses
Electronic monitoring device monitors the water level in primary sedimentation tank.When the water level of primary sedimentation tank is located at absolute altitude L1, wherein absolute altitude L1 setting away from
At primary sedimentation tank water outlet 6cm, stop the sewage transport into primary sedimentation tank, and the biomembrane taken out in denitrification pond is seen
It examines.As a result it shows in table 1.
Embodiment 9
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond.It uses
Electronic monitoring device monitors the water level in primary sedimentation tank, wherein absolute altitude L1It is arranged at primary sedimentation tank water outlet 7cm.In primary sedimentation tank
Water level be higher than absolute altitude L1When, stop the sewage transport into primary sedimentation tank, and the biomembrane taken out in denitrification pond is observed.
As a result it shows in table 1.
Embodiment 10
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond.The water level in primary sedimentation tank is monitored using electronic monitoring device, wherein absolute altitude L1Setting
At primary sedimentation tank water outlet 5cm, and at the same time the water level in detection denitrification pond, wherein absolute altitude L2It is arranged apart from anti-nitre
Change at pond water outlet 5cm.When the water level of primary sedimentation tank is lower than absolute altitude L1 and the water level in denitrification pond is lower than absolute altitude L2When, stop to
Sewage transport in primary sedimentation tank, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 1
In.
Embodiment 11
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond.The water level in primary sedimentation tank is monitored using electronic monitoring device, wherein absolute altitude L1Setting
At primary sedimentation tank water outlet 6cm, and at the same time the water level in detection denitrification pond, wherein absolute altitude L2It is arranged apart from anti-nitre
Change at pond water outlet 8cm.It is higher than absolute altitude L in the water level of primary sedimentation tank1When and denitrification pond water level be lower than absolute altitude L2When, stop to
Sewage transport in primary sedimentation tank, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 1
In.
Embodiment 12
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond.The water level in primary sedimentation tank is monitored using electronic monitoring device, wherein absolute altitude L1Setting
At primary sedimentation tank water outlet 6cm, and at the same time the water level in detection denitrification pond, wherein absolute altitude L2It is arranged apart from anti-nitre
Change at pond water outlet 7cm.It is higher than absolute altitude L in the water level of primary sedimentation tank1When and denitrification pond water level be higher than absolute altitude L2When, stop to
Sewage transport in primary sedimentation tank, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 1
In.
Embodiment 13
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond.The water level in primary sedimentation tank is monitored using electronic monitoring device, wherein absolute altitude L1Setting
At primary sedimentation tank water outlet 8cm, and at the same time the water level in detection denitrification pond, wherein absolute altitude L2It is arranged apart from anti-nitre
Change at pond water outlet 7cm.It is located at absolute altitude L in the water level of primary sedimentation tank1When and the water level in denitrification pond be located at absolute altitude L2When, stop to
Sewage transport in primary sedimentation tank, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 1
In.
Table 1
Embodiment 14
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond, wherein
Primary sedimentation tank includes the first overflow weir.The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1Setting exists
At the first overflow weir of distance bottom 5cm.When the water level of the first overflow weir is lower than absolute altitude L1When, the sewage stopped into primary sedimentation tank is defeated
It send, and the biomembrane taken out in denitrification pond is observed.As a result it shows in table 2.
Embodiment 15
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond, wherein
Primary sedimentation tank includes the first overflow weir.The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1Setting exists
At the first overflow weir of distance bottom 6cm.When the water level of the first overflow weir is located at absolute altitude L1When, the sewage stopped into primary sedimentation tank is defeated
It send, and the biomembrane taken out in denitrification pond is observed.As a result it shows in table 2.
Embodiment 16
Using the sewage disposal system including primary sedimentation tank and denitrification pond, primary sedimentation tank is located at the upstream in denitrification pond, wherein
Primary sedimentation tank includes the first overflow weir.The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1Setting exists
At the first overflow weir of distance bottom 7cm.It is higher than absolute altitude L in the water level of the first overflow weir1When, the sewage stopped into primary sedimentation tank is defeated
It send, and the biomembrane taken out in denitrification pond is observed.As a result it shows in table 2.
Embodiment 17
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond, and wherein primary sedimentation tank includes the first overflow weir and denitrification pond includes the second overflow weir.
The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1It is arranged in the first overflow weir of distance bottom 5cm
Place, and at the same time the water level in the second overflow weir of detection, wherein absolute altitude L2It is arranged at the second overflow weir of distance bottom 5cm.?
The water level of first overflow weir is lower than absolute altitude L1When and the second overflow weir water level be lower than absolute altitude L2When, stop the dirt into primary sedimentation tank
Water conveying, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 2.
Embodiment 18
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond, and wherein primary sedimentation tank includes the first overflow weir and denitrification pond includes the second overflow weir.
The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1It is arranged in the first overflow weir of distance bottom 6cm
Place, and at the same time the water level in the second overflow weir of detection, wherein absolute altitude L2It is arranged at the second overflow weir of distance bottom 8cm.?
The water level of first overflow weir is higher than absolute altitude L1When and the second overflow weir water level be lower than absolute altitude L2When, stop the dirt into primary sedimentation tank
Water conveying, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 2.
Embodiment 19
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond, and wherein primary sedimentation tank includes the first overflow weir and denitrification pond includes the second overflow weir.
The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1It is arranged in the first overflow weir of distance bottom 6cm
Place, and at the same time the water level in the second overflow weir of detection, wherein absolute altitude L2It is arranged at the second overflow weir of distance bottom 7cm.?
The water level of first overflow weir is higher than absolute altitude L1When and the second overflow weir water level be higher than absolute altitude L2When, stop the dirt into primary sedimentation tank
Water conveying, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 2.
Embodiment 20
Using the sewage disposal system for including primary sedimentation tank, denitrification pond and nitrification tank, primary sedimentation tank is located at the upper of denitrification pond
Trip, nitrification tank are located at the downstream in denitrification pond, and wherein primary sedimentation tank includes the first overflow weir and denitrification pond includes the second overflow weir.
The water level in the first overflow weir is monitored using electronic monitoring device, wherein absolute altitude L1It is arranged in the first overflow weir of distance bottom 8cm
Place, and at the same time the water level in the second overflow weir of detection, wherein absolute altitude L2It is arranged at the second overflow weir of distance bottom 7cm.?
The water level of first overflow weir is located at absolute altitude L1When and the water level of the second overflow weir be located at absolute altitude L2When, stop the dirt into primary sedimentation tank
Water conveying, and the biomembrane taken out in denitrification pond and nitrification tank is observed.As a result it shows in table 2.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements: from embodiment
5 to 7 as can be seen that need to be located at L in primary sedimentation tank water level in the case where sewage disposal system includes primary sedimentation tank and denitrification pond1
Shi Jinhang cleaning, to avoid due to sewage overflows (embodiment 5) caused by cleaning not in time.It simultaneously can be with by embodiment 6
Find out and is not up to L in primary sedimentation tank water level1When, the not completely plugged biomembrane of insoluble impurities, therefore, in the case where embodiment 6
Cleaning will cause excessively to clean the case where wasting energy consumption and water resource.
By embodiment 8 to 11 as can be seen that including the tertiary treatment device of primary sedimentation tank, denitrification pond and nitrification tank
In cesspool in system, reach L in the water level of primary sedimentation tank1Or the water level in denitrification pond reaches L2When should clean downstream one in time
The processing unit (denitrification pond or nitrification tank) of grade, should not be clear simultaneously after the water level of primary sedimentation tank and denitrification pond reaches absolute altitude
It washes, easily causes the completely plugged and sewage overflows (such as embodiment 8 and 9) of wherein coagulation device in this way.
It include the first overflow weir and/or denitrification pond in primary sedimentation tank includes that 14-20, which can be seen that, through the foregoing embodiment
In the case where two overflow weirs, water level is located at absolute altitude (L in overflow weir1Or L2) in the case where, denitrification pond or nitrification are cleaned in time
Caused by pond can be avoided due to cleaning not in time the case where sewage overflows.In addition, same in the first overflow weir and the second overflow weir
When be located at absolute altitude L1And L2When, while cleaning nitrification tank and denitrification pond also can be avoided the effect of blocking pipeline.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of cleaning method of sewage disposal system, the sewage disposal system includes the first order processing unit to communicate with each other
With second level processing unit, which is characterized in that the cleaning method includes:
Monitor the water level in the first order processing unit；
When the water level in the first order processing unit reaches absolute altitude L1When, the second level processing unit is cleaned.
2. the cleaning method of sewage disposal system according to claim 1, which is characterized in that the sewage disposal system is also
Include: the third level processing unit being connected to the second level processing unit, the cleaning method further comprises:
Monitor the water level in the second level processing unit；
When the water level in the second level processing unit reaches absolute altitude L2When, the third level processing unit is cleaned.
3. the cleaning method of sewage disposal system according to claim 1, which is characterized in that the first order processing unit
It is provided with the first overflow weir, the absolute altitude L1Mark line be arranged on first overflow weir.
4. the cleaning method of sewage disposal system according to claim 2, which is characterized in that the first order processing unit
It is provided with the first overflow weir, the second level processing unit is provided with the second overflow weir, and the absolute altitude L1Mark line set
It sets on first overflow weir, the absolute altitude L2Mark line be arranged on second overflow weir.
5. the cleaning method of sewage disposal system according to claim 1, which is characterized in that the first order processing unit
For primary sedimentation tank.
6. the cleaning method of sewage disposal system according to claim 1, which is characterized in that the second level processing unit
For denitrification pond or nitrification tank.
7. the cleaning method of sewage disposal system according to claim 2, which is characterized in that the second level processing unit
For denitrification pond, the third level processing unit is nitrification tank.
8. the cleaning method of sewage disposal system according to any one of claim 1 to 7, which is characterized in that use with
Lower step cleans the second level processing unit:
With 0.3~0.5L/s/m2Air douche 5~7 minutes；
With 0.2~0.4L/s/m2Air and the water joints of 1.5~2.5 times of flow of inlet water rinse 3~5 minutes；And
It is rinsed 3~5 minutes with the water of 2~3 times of flow of inlet water.
9. the cleaning method of sewage disposal system according to claim 2, which is characterized in that using following steps to described
Third level processing unit is cleaned:
With 0.3~0.5L/s/m2Air douche 5~7 minutes；
With 0.2~0.4L/s/m2Air and the water joints of 1.5~2.5 times of flow of inlet water rinse 3~5 minutes；And
It is rinsed 3~5 minutes with the water of 2~3 times of flow of inlet water.
10. the cleaning method of sewage disposal system according to claim 6 or 7, which is characterized in that in the denitrification pond
It is provided with the biomembrane including anaerobic bacteria, the anaerobic bacteria includes denitrification achromobacter, denitrification micrococcus luteus, denitrification
Pseudomonad, Pseudomonas fluorescens, denitrification color bacillus and chromobacterium violaceum；It is preferred that being provided in the nitrification tank including aerobic
The biomembrane of bacterium, the aerobic bacteria be originated from Nitrobacter, Nitrospina, Nitrococcus, Nitromonas,
Nitrosospira, Nitrosococcus and Nitrosolobus.
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