CN105621780B - A method of waste water is handled using carrier fluidised form metaplasia object membrane reactor - Google Patents
A method of waste water is handled using carrier fluidised form metaplasia object membrane reactor Download PDFInfo
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- CN105621780B CN105621780B CN201410588706.4A CN201410588706A CN105621780B CN 105621780 B CN105621780 B CN 105621780B CN 201410588706 A CN201410588706 A CN 201410588706A CN 105621780 B CN105621780 B CN 105621780B
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Abstract
The invention discloses a kind of methods using carrier fluidised form metaplasia object membrane reactor processing waste water, the described method includes: waste water to be processed is successively handled in biochemical reaction tank, mixing pit and sedimentation basin, the supernatant of sedimentation basin is discharged, and the sludge for precipitating bottom of pond portion is at least partly back to biochemical reaction tank, wherein, active carbon is added in biochemical reaction tank water outlet and be uniformly mixed in mixing pit.Method of the invention can be effectively reduced the suspension content in the water outlet obtained after processing, have many advantages, such as excellent water treatment effect, and have fast biofilm speed, strong shock resistance, high treating effect, operational management convenient.
Description
Technical field
The present invention relates to field of waste water treatment, and in particular, to a kind of to be handled using carrier fluidised form metaplasia object membrane reactor
The method of waste water.
Background technique
Carrier fluidised form metaplasia object membrane reactor is a kind of biofilm waste water biochemical treatment device for wastewater treatment, i.e.,
In biooxidation reactions pond load certain amount specific gravity (specific gravity be biomembrane suspending carrier density and water density it
Than) close to 1 biomembrane suspending carrier pass through life using the oxygen of the biomembrane and ample supply that are grown on suspending carrier
Pollutant oxygenolysis in waste water is reached purification of waste water purpose by object oxidation.At carrier fluidised form metaplasia object embrane method biochemistry
Science and engineering skill has the advantages that general biofilm, i.e., with energy-efficient, occupied area is small, anti impulsion load, operational management side
Just the features such as, more and more attention have been obtained since appearance, be widely used at the sewage of all trades and professions at present
Reason system.
To make suspending carrier keep homogeneous fluidization in carrier fluidised form metaplasia object embrane method biochemical treatment apparatus operational process, need
Stronger aeration intensity is wanted, therefore the scouring force in biooxidation reactions pond is stronger, microbial film is easy to fall off from carrier surface,
And the biomembrane to fall off is compared with activated sludge, more fine crushing, loose, settling property is poor, thereby results in and hangs in processing water outlet
Not only concentration is higher and is not easy sedimentation separation for floating object.It is the removal for guaranteeing suspended matter in water, carrier fluidised form metaplasia in practical application
The water outlet of object embrane method biochemical treatment apparatus generally requires to carry out further coagulating kinetics.But after coagulating kinetics
Water outlet in suspended matter content it is still higher.
Another kind biochemical processing method corresponding with biofilm is activated sludge process, and activated sludge process is relative to biology
One feature of embrane method is that processing fining degree is relatively high." Combined Activated Sludge-powdered Activated Carbon technique " (i.e. Powdered
Activated Carbon Treatment Process, is abbreviated as PACT technique) be a kind of activated sludge process improvement technique,
The technique is made by adding Powdered Activated Carbon into biochemistry pool using Powdered Activated Carbon and the microorganism in activated sludge jointly
With removal of the increasing to pollutant." Combined Activated Sludge-powdered Activated Carbon " process effect is good, dirty in industrial wastewater and city
Water treatment field has obtained more application.Have multiple relevant patent applications and document report in the prior art.Such as:
103086503 A of patent application CN (PACT technique, device and its active carbon-microbial bacteria micelle cultural method)
Propose a kind of PACT technique, device and its active carbon-microbial bacteria micelle cultural method, by choose activated sludge culture at
After ripe, Powdered Activated Carbon is added, using Powdered Activated Carbon as core, microorganism wraps up active carbon and forms active carbon-microbial bacteria
Micelle wadding body, and tamed, increase the specific gravity of Powdered Activated Carbon, increases its precipitability.The PACT process unit increases dirty
Mud backflow pool adds Powdered Activated Carbon in sludge reflux pond, enables Powdered Activated Carbon and microorganism in sludge reflux pond
Active carbon-microbial bacteria micelle is formed, extends powder activity in the residence time of water treatment system；The sludge in sludge reflux pond is logical
It crosses elevator pump to be lifted at the wastewater influent of aerobic tank front end, increases the mixing of sludge and sewage, extend Powdered Activated Carbon aerobic
Residence time in pond enhances treatment effect.
(one kind is renewable to recycle Powdered Activated Carbon processing waste water difficult for biological degradation to 102616922 A of patent application CN
PACT new process) propose a kind of renewable new work of PACT for recycling Powdered Activated Carbon processing waste water difficult for biological degradation
Skill, comprising the following steps: 1) extract the Powdered Activated Carbon to precipitate in secondary settling tank and biological activated sludge out；2) to step
1) Powdered Activated Carbon and biological activated sludge extracted out are carried out dehydrating；3) the dewatered powder activity that step 2) is obtained
Charcoal and biological activated sludge be successively dried, destructive distillation and activation processing, and the organic matter of powder electroless plating is made to decompose volatilization,
Biological activated sludge pyrolysis is active carbon；4) biochemical as regeneration Powdered Activated Carbon investment after the product milling obtained step 3)
Pond uses.In the patent application, Powdered Activated Carbon be dehydrated with biological activated sludge after through drying, destructive distillation and activation processing and again
It is raw, while biological activated sludge pyrolysis is active carbon, has achieved the purpose that recycle Powdered Activated Carbon and biological activated sludge.
101376538 A of patent application CN (powdered activated charcoal strengthened built-in beam type membrane bioreactor) proposes one kind
Using Powdered Activated Carbon is added come the treatment process of reinforced film biological reactor, a kind of novel beam formula doughnut is used in technique
Membrane module.By adding for Powdered Activated Carbon, make biosystem that the Granular sludge with good sedimentation function be more readily formed,
The dirt for reducing hollow-fibre membrane is stifled.Powdered Activated Carbon and membrane bioreactor generate synergistic effect simultaneously, difficult in waste water can will give birth to
The organic matter of object degradation carries out absorption degradation, improves system processing capacity and effluent quality.The beam formula doughnut of special designing
Membrane module, in operation can sufficiently dissipation air, prevent sludge blockage, air purge effect is good, effluent flux is stablized.
" the problem of should be noted that in PACT technical study progress and application " (Treatment of Industrial Water, the 1st phase of volume 20 in 2000)
Powdered Activated Carbon-activated sludge process the generation of middle summarized introduction, process flow, feature, the mechanism of action are inquired into, in removal sewage
The kinetic model of Treatment of organic priority pollutants and the Railway Project that should be noted that using PACT technique.
But there is sludge bulking in activated sludge process, automatic controlling level is lower, is unfavorable for running operation pipe
Reason.
Summary of the invention
The purpose of the invention is to overcome conventional carrier fluidised form metaplasia object membrane reactor in art methods to handle out
Water suspension content after precipitation process is still very high, activated sludge process is unfavorable for running the defect of operational administrative, provides one kind
Using the method for carrier fluidised form metaplasia object membrane reactor processing waste water, this method not only overcomes conventional carrier fluidised form metaplasia object film
Reactor for treatment water outlet still very high disadvantage of suspension content after precipitation process, and the fast, shock resistance with biofilm speed
The advantages that ability is strong, high treating effect, operational management facilitate.
The present inventor has been surprisingly found that under study for action, is utilizing carrier fluidised form metaplasia object membrane reactor processing waste water
In method, waste water to be processed is successively handled in biochemical reaction tank, mixing pit and sedimentation basin, by biochemical reaction tank
Active carbon is added in water outlet and is uniformly mixed in mixing pit, and the supernatant of sedimentation basin is discharged and will precipitate the sludge of bottom of pond portion extremely
Small part is back to the mode of biochemical reaction tank, can be effectively reduced the suspension content in the water outlet that processing obtains, and has excellent
Different water treatment effect, and it is excellent that there is biofilm speed fast, strong shock resistance, high treating effect, operational management to facilitate etc.
Point.
Therefore, to achieve the goals above, handled the present invention provides a kind of using carrier fluidised form metaplasia object membrane reactor
The method of waste water, which comprises by waste water to be processed successively in biochemical reaction tank, mixing pit and sedimentation basin
Reason, is discharged the supernatant of sedimentation basin, and the sludge for precipitating bottom of pond portion is at least partly back to biochemical reaction tank, wherein in life
Change and adds active carbon in reaction tank water outlet and be uniformly mixed in mixing pit.
Due to the use that adds and flow back of active carbon, of the invention handles waste water using carrier fluidised form metaplasia object membrane reactor
Biochemical processing method have the advantages that
1) presence of active carbon can improve the settling property of biological floe in biochemical reaction tank water outlet, promoted and be separated by solid-liquid separation
Ability has excellent so that overcoming conventional carrier fluidised form metaplasia object membrane reactor handles out the high disadvantage of water suspension content
Water treatment effect.
2) biofilm speed is fast: since active carbon specific surface is big, it is easy to the apposition growth of microorganism, it can during carrier biofilm
So as to more microorganism wadding bodies be kept in biochemical reaction tank here, to be conducive to the rapid biofilm of suspending carrier.
3) strong shock resistance: since active carbon has powerful adsorption capacity, when biochemical reaction tank influent quality occurs
When deterioration, active carbon, which can adsorb more polluters and take a turn for the better with water quality, is released slowly into biochemical reaction tank, thus play compared with
Strong shock resistance protective effect.
4) high treating effect: since active carbon has powerful adsorption capacity, a part in water can be adsorbed and be not easy biology
The pollutant of degradation；Active carbon improves biochemistry as the aggregation core of free microorganism wadding body in biochemical reaction tank simultaneously
The content of free microorganism wadding body in reaction tank helps to improve biochemical reaction tank to the process of refinement journey of water pollutant
Degree, so as to improve the disposed of in its entirety effect of system.
5) operational management is convenient: present invention process is biofilm, and there is no the sludge bulking problems of activated sludge process；Together
The biofilm reactor automatic controlling level of Shi Caiyong suspending carrier is high, to simplify operation operational administrative.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Fig. 1 is the process flow chart of the method for the invention using carrier fluidised form metaplasia object membrane reactor processing waste water.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of methods using carrier fluidised form metaplasia object membrane reactor processing waste water, this method comprises:
Waste water to be processed is successively handled in biochemical reaction tank, mixing pit and sedimentation basin, the supernatant of sedimentation basin is discharged, and will
The sludge of precipitating bottom of pond portion is at least partly back to biochemical reaction tank, wherein adds active carbon simultaneously in biochemical reaction tank water outlet
It is uniformly mixed in mixing pit.
In the method for the present invention, the biochemical process handled in biochemical reaction tank is biological membrane method treating process.It is preferred that
In the case of, the mode handled in biochemical reaction tank includes: suspending carrier to be placed in biochemical reaction tank and biochemical anti-
Answer bottom of pond portion installation aeration oxygen supply equipment.For suspending carrier, there is no particular limitation, can be commonly used in the art with organic
Material is various suspending carriers made of main Raw material processing, wherein organic material can be polyethylene, polypropylene etc..Generally
Ground, the specific gravity (the ratio between specific gravity, that is, suspending carrier density and the density of water) and water of suspending carrier are close, it is preferable that suspending carrier
Specific gravity be 0.96-0.99.For aeration oxygen supply equipment, there is no particular limitation, can supply for various aerations commonly used in the art
Oxygen equipment, such as can be perforated pipe aerating regulation system.
It will be understood by those skilled in the art that the suspending carrier placed in biochemical reaction tank can be used as biomembrane
Adhere to medium, microorganism forms biomembrane in suspending carrier surface apposition growth, and the microorganism in biomembrane is in growth and breeding mistake
Pollution removal effect is played in journey；In the growth and breeding that the aeration oxygen supply equipment of biochemical reaction bottom of pond portion installation can be microorganism
Oxygen is provided, while suspending carrier being made to keep homogeneous fluidization.
In the method for the present invention, under preferable case, suspending carrier is column suspending carrier or spherical suspending carrier, and column is outstanding
The diameter of float carrier is preferably 0.5-15cm, further preferably 0.5-5cm, and the thickness of column suspending carrier is preferably 0.2-
10cm, further preferably 0.3-3.0cm；The diameter of spherical suspending carrier is preferably 0.5-15cm, further preferably 0.5-
6cm；In terms of stacking volume, the filling rate of suspending carrier is preferably 10-70% in biochemical reaction tank, further preferably 25-
45%.
In the method for the present invention, it will be understood by those skilled in the art that stacking volume refers to suspending carrier in natural heap
The space size occupied under cumuliformis state.Filling rate refer to the suspending carrier of filling stacking volume and biochemical reaction tank it is effective
The ratio of volume.
In the method for the present invention, according to the concrete condition of waste water quality to be processed, (including COD height, biochemical treatment performance are excellent
It is of inferior quality) determine the COD load of biochemical reaction tank, under preferable case, the COD load of biochemical reaction tank is 0.2-20Kg COD/
m3D, further preferably 1-4Kg COD/m3·d。
In the method for the present invention, according to the concrete condition of waste water quality to be processed, (including COD height, biochemical treatment performance are excellent
It is of inferior quality) determine the hydraulic detention time of biochemical reaction tank, under preferable case, the condition packet that is handled in biochemical reaction tank
Include: the hydraulic detention time of biochemical reaction tank is 2-50h, it is further preferred that the hydraulic detention time of biochemical reaction tank is 8-
25h。
In the method for the present invention, the dosage of active carbon, preferable case are determined according to the concrete condition of waste water quality to be processed
Under, it being discharged relative to every liter of biochemical reaction tank, the amount of the active carbon added in biochemical reaction tank water outlet is 25-2500mg, into
One step is preferably 50-500mg.
In the method for the present invention, under preferable case, active carbon is Powdered Activated Carbon, and partial size is 30-300 mesh, further preferably
Ground, partial size are 50-150 mesh.
In the method for the present invention, for opportunity for adding active carbon in biochemical reaction tank is discharged, there is no particular limitation, only
It wants to be uniformly mixed active carbon with biochemical reaction tank water outlet in mixing pit, for example, can be to enter mixing pit
Before, active carbon first is added in biochemical reaction tank water outlet, is then uniformly mixed the waste water for being mixed with active carbon in mixing pit；
Or it adds active carbon being passed through in the biochemical reaction tank water outlet to mixing pit and is uniformly mixed.
It will be understood by those skilled in the art that adding Powdered Activated Carbon in biochemical reaction tank water outlet and in mixing pit
In after mixing, can make active carbon sufficiently play absorption waste water in contaminant remaining and improve waste water in suspended substance sedimentation
The effect of energy, so as to enhance the disposed of in its entirety effect of system.
In the method for the present invention, under preferable case, the condition handled in mixing pit includes: the hydraulic retention of mixing pit
Time is 5-60min, further preferably 10-30min.
In the method for the present invention, sedimentation basin hydraulic detention time can according to the design standard value of common biochemical secondary settling tank,
Under preferable case, the condition handled in sedimentation basin includes: that the hydraulic detention time of sedimentation basin is 45-240min, into one
Step is preferably 80-120min.
It will be understood by those skilled in the art that the mode handled in sedimentation basin may include: that mixing pit goes out
Water enters sedimentation basin and carries out precipitation and separation, is discharged the supernatant of sedimentation basin, and sludge (including the powder activity that will precipitate bottom of pond portion
Microorganism wadding body and other suspended matters in charcoal, biochemical reaction tank water outlet) it is at least partly back to the front end of biochemical reaction tank,
And remaining sludge is then periodically emitted into sludge treating system and is handled.
In the method for the present invention, under preferable case, the reflux ratio for precipitating the sludge of bottom of pond portion is 15-300%, preferably 25-
100%.
Embodiment
The present invention is further illustrated for embodiment below, but is not intended to limit the present invention.
In following embodiment and comparative example, the measurement of waste water COD uses dichromate titration (GB11914-89), waste water BOD
Measurement using dilution and inocalation method (GB/T 7488-1987), the measurement of ammonia nitrogen uses Na's colorimetry (GB 7479-87),
The measurement of suspended matter uses gravimetric method (GB11901-89), and the measurement of oil content is using " oil content measurement side in oil field extracted water
Method (SY/T0530-2011) ".
Powdered Activated Carbon (partial size is 80-100 mesh) is purchased from Gongyi City Hua Long filtrate factory.
Diameter is 2.5cm, the column suspending carrier of thickness 0.8cm is purchased from Zhonghai Asphalt (Taizhou) Co., Ltd., specific gravity
It is 0.98.
The spherical suspending carrier that diameter is 2.5cm is purchased from Zhonghai Asphalt (Taizhou) Co., Ltd., specific gravity 0.98.
Embodiment 1
The present embodiment is used to illustrate the method for the invention using carrier fluidised form metaplasia object membrane reactor processing waste water.
(in actual production, wastewater treatment process is dynamic processes to waste water to be processed, and each index of waste water usually exists
Within the scope of certain) basic condition: COD 500-600mg/L, BOD 180-350mg/L, ammonia nitrogen 20-35mg/L,
Oil content is 15-30mg/L, suspension content 100-200mg/L.
In biochemical reaction tank place diameter be 2.5cm, the column suspending carrier that thickness 0.8cm, specific gravity are 0.98, with heap
Stereometer is accumulated, the filling rate of column suspending carrier is 35% in biochemical reaction tank, and installs perforated pipe in biochemical reaction bottom of pond portion
Aforementioned waste water to be processed is passed through in biochemical reaction tank and handles by aerating system, and the COD load of biochemical reaction tank is 2.4-
2.9Kg COD/m3D, the hydraulic detention time of biochemical reaction tank are 10h；After biochemical reaction tank water outlet is passed through in mixing pit,
It is discharged relative to every liter of biochemical reaction tank, adds 300mg Powdered Activated Carbon in biochemical reaction tank water outlet, and mix in mixing pit
It closes uniformly, the hydraulic detention time of mixing pit is 20min；Mixing pit water outlet is passed through in sedimentation basin and carries out precipitation and separation, is discharged
The supernatant of sedimentation basin, and the sludge for precipitating bottom of pond portion is at least partly back to the front end of biochemical reaction tank, and remaining dirt
Mud is then periodically emitted into sludge treating system and is handled, wherein sedimentation basin hydraulic detention time is 1.5h, precipitates bottom of pond portion
The reflux ratio of sludge is 35%.
System stable operation measures after 20 days: it is 20-25mg/L, ammonia nitrogen 3-4mg/L, oil content that sedimentation basin, which is discharged COD,
For 3-4mg/L, suspension content 20-25mg/L, it is better than national grade one discharge standard (COD≤60mg/L, ammonia nitrogen≤15mg/
L, oil content≤10mg/L, suspension content≤70mg/L).
Embodiment 2
The present embodiment is used to illustrate the method for the invention using carrier fluidised form metaplasia object membrane reactor processing waste water.
(in actual production, wastewater treatment process is dynamic processes to waste water to be processed, and each index of waste water usually exists
Within the scope of certain) basic condition: COD 500-600mg/L, BOD 180-350mg/L, ammonia nitrogen 20-35mg/L,
Oil content is 15-30mg/L, suspension content 100-200mg/L.
In biochemical reaction tank place diameter be 2.5cm, the spherical suspending carrier that specific gravity is 0.98, in terms of stacking volume,
The filling rate of spherical suspending carrier is 25% in biochemical reaction tank, and installs perforated pipe aerating regulation system in biochemical reaction bottom of pond portion,
Aforementioned waste water to be processed is passed through in biochemical reaction tank and is handled, the COD load of biochemical reaction tank is 1.0-1.2Kg COD/
m3D, the hydraulic detention time of biochemical reaction tank are 25h；After biochemical reaction tank water outlet is passed through in mixing pit, relative to every liter
Biochemical reaction tank water outlet adds 500mg Powdered Activated Carbon in biochemical reaction tank water outlet, and is uniformly mixed in mixing pit, mixes
The hydraulic detention time for closing pond is 10min；Mixing pit water outlet is passed through in sedimentation basin and carries out precipitation and separation, the upper of sedimentation basin is discharged
Clear liquid, and the sludge for precipitating bottom of pond portion is at least partly back to the front end of biochemical reaction tank, and remaining sludge is then periodically arranged
It puts to sludge treating system and is handled, wherein sedimentation basin hydraulic detention time is 80min, precipitates returning for the sludge of bottom of pond portion
Stream is than being 100%.
System stable operation measures after 20 days: it is 23-26mg/L, ammonia nitrogen 3-4mg/L, oil content that sedimentation basin, which is discharged COD,
For 3-4mg/L, suspension content 22-26mg/L, it is better than national grade one discharge standard (COD≤60mg/L, ammonia nitrogen≤15mg/
L, oil content≤10mg/L, suspension content≤70mg/L).
Embodiment 3
The present embodiment is used to illustrate the method for the invention using carrier fluidised form metaplasia object membrane reactor processing waste water.
(in actual production, wastewater treatment process is dynamic processes to waste water to be processed, and each index of waste water usually exists
Within the scope of certain) basic condition: COD 500-600mg/L, BOD 180-350mg/L, ammonia nitrogen 20-35mg/L,
Oil content is 15-30mg/L, suspension content 100-200mg/L.
In biochemical reaction tank place diameter be 2.5cm, the column suspending carrier that thickness 0.8cm, specific gravity are 0.98, with heap
Stereometer is accumulated, the filling rate of column suspending carrier is 45% in biochemical reaction tank, and installs perforated pipe in biochemical reaction bottom of pond portion
Aforementioned waste water to be processed is passed through in biochemical reaction tank and handles by aerating system, and the COD load of biochemical reaction tank is 3.8-
4.0Kg COD/m3D, the hydraulic detention time of biochemical reaction tank are 8h；After biochemical reaction tank water outlet is passed through in mixing pit,
It is discharged relative to every liter of biochemical reaction tank, adds 50mg Powdered Activated Carbon in biochemical reaction tank water outlet, and mix in mixing pit
It closes uniformly, the hydraulic detention time of mixing pit is 30min；Mixing pit water outlet is passed through in sedimentation basin and carries out precipitation and separation, is discharged
The supernatant of sedimentation basin, and the sludge for precipitating bottom of pond portion is at least partly back to the front end of biochemical reaction tank, and remaining dirt
Mud is then periodically emitted into sludge treating system and is handled, wherein sedimentation basin hydraulic detention time is 120min, precipitates bottom of pond portion
Sludge reflux ratio be 25%.
System stable operation measures after 20 days: it is 25-30mg/L, ammonia nitrogen 5-8mg/L, oil content that sedimentation basin, which is discharged COD,
For 3.5-4.5mg/L, suspension content 25-30mg/L, better than national grade one discharge standard (COD≤60mg/L, ammonia nitrogen≤
15mg/L, oil content≤10mg/L, suspension content≤70mg/L).
Embodiment 4
The present embodiment is used to illustrate the method for the invention using carrier fluidised form metaplasia object membrane reactor processing waste water.
(in actual production, wastewater treatment process is dynamic processes to waste water to be processed, and each index of waste water usually exists
Within the scope of certain) basic condition: COD 1000-1500mg/L, BOD 300-600mg/L, ammonia nitrogen 30-45mg/
L, oil content 15-30mg/L, suspension content 100-300mg/L.
In biochemical reaction tank place diameter be 2.5cm, the column suspending carrier that thickness 0.8cm, specific gravity are 0.98, with heap
Stereometer is accumulated, the filling rate of column suspending carrier is 20% in biochemical reaction tank, and installs perforated pipe in biochemical reaction bottom of pond portion
Aforementioned waste water to be processed is passed through in biochemical reaction tank and handles by aerating system, and the COD load of biochemical reaction tank is 7.8-
8.0Kg COD/m3D, the hydraulic detention time of biochemical reaction tank are 30h；After biochemical reaction tank water outlet is passed through in mixing pit,
It is discharged relative to every liter of biochemical reaction tank, adds 700mg Powdered Activated Carbon in biochemical reaction tank water outlet, and mix in mixing pit
It closes uniformly, the hydraulic detention time of mixing pit is 40min；Mixing pit water outlet is passed through in sedimentation basin and carries out precipitation and separation, is discharged
The supernatant of sedimentation basin, and the sludge for precipitating bottom of pond portion is at least partly back to the front end of biochemical reaction tank, and remaining dirt
Mud is then periodically emitted into sludge treating system and is handled, wherein sedimentation basin hydraulic detention time is 150min, precipitates bottom of pond portion
Sludge reflux ratio be 15%.
System stable operation measures after 20 days: sedimentation basin is discharged COD as 32-36mg/L, and ammonia nitrogen 10-14mg/L, oil contains
Amount be 3.5-4.5mg/L, suspension content 33-37mg/L, better than national grade one discharge standard (COD≤60mg/L, ammonia nitrogen≤
15mg/L, oil content≤10mg/L, suspension content≤70mg/L).
Embodiment 5
The present embodiment is used to illustrate the method for the invention using carrier fluidised form metaplasia object membrane reactor processing waste water.
(in actual production, wastewater treatment process is dynamic processes to waste water to be processed, and each index of waste water usually exists
Within the scope of certain) basic condition: COD 400-500mg/L, BOD 120-220mg/L, ammonia nitrogen 25-40mg/L,
Oil content is 15-30mg/L, suspension content 100-200mg/L.
In biochemical reaction tank place diameter be 2.5cm, the spherical suspending carrier that specific gravity is 0.98, in terms of stacking volume,
The filling rate of spherical suspending carrier is 70% in biochemical reaction tank, and installs perforated pipe aerating regulation system in biochemical reaction bottom of pond portion,
Aforementioned waste water to be processed is passed through in biochemical reaction tank and is handled, the COD load of biochemical reaction tank is 0.8-1.0Kg COD/
m3D, the hydraulic detention time of biochemical reaction tank are 5h；After biochemical reaction tank water outlet is passed through in mixing pit, relative to every liter
Biochemical reaction tank water outlet adds 900mg Powdered Activated Carbon in biochemical reaction tank water outlet, and is uniformly mixed in mixing pit, mixes
The hydraulic detention time for closing pond is 8min；Mixing pit water outlet is passed through in sedimentation basin and carries out precipitation and separation, the upper of sedimentation basin is discharged
Clear liquid, and the sludge for precipitating bottom of pond portion is at least partly back to the front end of biochemical reaction tank, and remaining sludge is then periodically arranged
It puts to sludge treating system and is handled, wherein sedimentation basin hydraulic detention time is 1h, precipitates the reflux ratio of the sludge of bottom of pond portion
It is 150%.
System stable operation measures after 20 days: sedimentation basin is discharged COD as 38-41mg/L, and ammonia nitrogen 11-14mg/L, oil contains
Amount be 4-4.5mg/L, suspension content 35-38mg/L, better than national grade one discharge standard (COD≤60mg/L, ammonia nitrogen≤
15mg/L, oil content≤10mg/L, suspension content≤70mg/L).
Comparative example 1
According to the method for embodiment 1, unlike, after biochemical reaction tank water outlet is passed through in mixing pit, powder is not added
Active carbon, and the sludge for precipitating bottom of pond portion is not back to the front end of biochemical reaction tank.
System stable operation measures after 20 days: sedimentation basin is discharged COD as 45-60mg/L, and ammonia nitrogen 12-15mg/L, oil contains
Amount be 6-9mg/L, suspension content 90-140mg/L, suspension content be unsatisfactory for national grade one discharge standard (COD≤
60mg/L, ammonia nitrogen≤15mg/L, oil content≤10mg/L, suspension content≤70mg/L).
By the embodiment of the present invention 1 compared with comparative example 1, it is known that: it is useless being handled using carrier fluidised form metaplasia object membrane reactor
In the biochemical processing method of water, active carbon is added in biochemical reaction tank water outlet and is uniformly mixed in mixing pit, and will precipitating
The sludge of bottom of pond portion is at least partly back in biochemical reaction tank, can be effectively reduced the suspension content in processing water outlet, greatly
The big treatment effect for improving waste water.
Method of the invention can be effectively reduced the suspension content in the water outlet that processing obtains, and have at excellent waste water
Effect is managed, and has many advantages, such as that fast biofilm speed, strong shock resistance, high treating effect, operational management are convenient.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (20)
1. a kind of method for handling waste water, which is characterized in that the described method includes: by waste water to be processed successively in biochemical reaction
It is handled in pond, mixing pit and sedimentation basin, the supernatant of sedimentation basin is discharged, and the sludge for precipitating bottom of pond portion is at least partly returned
It is back to biochemical reaction tank, wherein the biochemical reaction tank is carrier fluidised form metaplasia object membrane reactor, in biochemical reaction tank water outlet
It adds active carbon and is uniformly mixed in independent mixing pit.
2. being discharged according to the method described in claim 1, wherein, being discharged relative to every liter of biochemical reaction tank in biochemical reaction tank
In the amount of active carbon that adds be 25-2500mg.
3. being discharged according to the method described in claim 2, wherein, being discharged relative to every liter of biochemical reaction tank in biochemical reaction tank
In the amount of active carbon that adds be 50-500mg.
4. method according to claim 1 or 2, wherein the active carbon is Powdered Activated Carbon, and partial size is 30-300 mesh.
5. partial size is 50-150 mesh according to the method described in claim 4, wherein, the active carbon is Powdered Activated Carbon.
6. method described in any one of -3 according to claim 1, wherein the mode packet handled in biochemical reaction tank
It includes: placing suspending carrier in biochemical reaction tank and aeration oxygen supply equipment is installed in biochemical reaction bottom of pond portion.
7. according to the method described in claim 6, wherein, the suspending carrier is that column suspending carrier or spherical suspension carry
Body, the diameter of the column suspending carrier are 0.5-15cm, the column suspending carrier with a thickness of 0.2-10cm；It is described spherical
The diameter of suspending carrier is 0.5-15cm；In terms of stacking volume, the filling rate of suspending carrier is 10-70% in biochemical reaction tank.
8. the column is outstanding according to the method described in claim 7, wherein, the diameter of the column suspending carrier is 0.5-5cm
Float carrier with a thickness of 0.3-3.0cm.
9. according to the method described in claim 7, wherein, the diameter of the spherical suspending carrier is 0.5-6cm.
10. according to the method described in claim 7, wherein, in terms of stacking volume, the filling rate of suspending carrier in biochemical reaction tank
For 25-45%.
11. according to the method described in claim 6, wherein, the COD load of biochemical reaction tank is 0.2-20Kg COD/m3·d。
12. according to the method for claim 11, wherein the COD load of biochemical reaction tank is 1-4Kg COD/m3·d。
13. according to the method described in claim 6, wherein, the condition handled in biochemical reaction tank includes: biochemical reaction
The hydraulic detention time in pond is 2-50h.
14. according to the method for claim 13, wherein the condition handled in biochemical reaction tank includes: biochemical anti-
The hydraulic detention time of Ying Chi is 8-25h.
15. method according to claim 1 or 2, wherein the condition handled in mixing pit includes: mixing pit
Hydraulic detention time is 5-60min.
16. according to the method for claim 15, wherein the condition handled in mixing pit includes: the water of mixing pit
The power residence time is 10-30min.
17. method according to claim 1 or 2, wherein the condition handled in sedimentation basin includes: sedimentation basin
Hydraulic detention time is 45-240min.
18. according to the method for claim 17, wherein the condition handled in sedimentation basin includes: the water of sedimentation basin
The power residence time is 80-120min.
19. according to the method for claim 17, wherein the reflux ratio for precipitating the sludge of bottom of pond portion is 15-300%.
20. according to the method for claim 19, wherein the reflux ratio for precipitating the sludge of bottom of pond portion is 25-100%.
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| JPS6238295A (en) * | 1985-08-13 | 1987-02-19 | Ebara Res Co Ltd | Treatment of organic sewage |
| CN101054249A (en) * | 2006-04-11 | 2007-10-17 | 同济大学 | Multipoint water feeding sewage treatment process by zeolite and organism united adsorption and regeneration |
| CN101955306A (en) * | 2010-10-19 | 2011-01-26 | 江苏省环境科学研究院 | A kind of paper waste high-efficiency biological strengthening treatment technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6238295A (en) * | 1985-08-13 | 1987-02-19 | Ebara Res Co Ltd | Treatment of organic sewage |
| CN101054249A (en) * | 2006-04-11 | 2007-10-17 | 同济大学 | Multipoint water feeding sewage treatment process by zeolite and organism united adsorption and regeneration |
| CN101955306A (en) * | 2010-10-19 | 2011-01-26 | 江苏省环境科学研究院 | A kind of paper waste high-efficiency biological strengthening treatment technology |
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