CN110002582A - A kind of method of excess sludge fermentation coupled biological Co metabolism removal 2,4,6- trichlorophenol - Google Patents
A kind of method of excess sludge fermentation coupled biological Co metabolism removal 2,4,6- trichlorophenol Download PDFInfo
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Abstract
A kind of method that excess sludge fermentation coupled biological Co metabolism removes 2,4,6- trichlorophenols, belongs to technical field of biological sewage treatment.The SBR device for removing 2,4,6- trichlorophenols is coupled by the present invention with sludge fermentation device, realizes the steady removal of chlorophenol and reduces the yield of system spare sludge.Operational process are as follows: the activated sludge for generating pretreated sewage treatment plant residual active sludge and this system carries out anaerobic acid-production fermentation, and fermentation liquid passes through precipitation process, sbr reactor device is added to as carbon source, 2,4,6- trichlorophenols are removed for Co metabolism, and carbon source is provided.One aspect of the present invention reaches toxic 2,4, the 6- trichlorophenol of hardly degraded organic substance of steady removal, and can reduce the excess sludge of system generation, while consuming external source sludge, reduces the cost of investment of carbon source, provides a new approaches for Phenol-Containing Wastewater Treatment.
Description
Technical field
The present invention relates to the methods that a kind of excess sludge fermentation coupled biological Co metabolism removes 2,4,6- trichlorophenols, belong to dirt
Aquatic organism process field.Co metabolism technology is widely used in sewage treatment as a kind of very promising biologic treating technique
Field, and suitable Co metabolism organic carbon source is selected to become the key that Co metabolism technology develops.Excess sludge anaerobic fermentation technology,
Not only mud decrement may be implemented, but also high-quality carbon source can be provided for biologic treating technique.
Background technique
Trichlorophenol is industrially widely used as a kind of raw material of industry.Therefore, in process of production with containing phenol
A large amount of discharges of waste water cause huge harm to aquatic ecological.2,4,6- trichlorophenol is as a kind of typical, widely used
The raw material of industry has " three cause " effect to human body and aquatic animals and plants, belongs to toxic organic pollutant, have been cited as priority acccess control
Pollutant.Currently, being broadly divided into physico-chemical process, chemical method and biochemical method three categories to the processing of phenol wastewater, wherein biochemical method is
Relatively economical and feasible processing method, but 2, there is inhibition and toxic action to microorganism in the toxicity of 4,6- trichlorophenols, therefore,
Simple bioremediation still remains halfway phenomenon to the removal of trichlorophenol.
Currently, Co metabolism can effectively remove the biochemical technology of toxic pollutant as one kind, have been widely used for giving up
In water process.Co metabolism refer to microorganism in the case that can not quickly or degradation toxic organic compound, add one or more
Can be by microorganism fast degradation or the harmless organic matter utilized into degradation system, this organic matter can be with toxic organic compound
Be degraded by microorganisms mineralising jointly, the method for being finally reached quickly removal toxic organic compound.This harmless organic matter is referred to as altogether
It is metabolized carbon source, the problem of organic carbon source deficiency, can also improve micro- when it not only can solve microbial degradation toxic organic compound
Biology improves the stability of processing system to the tolerance of toxic organic compound, is finally reached and efficiently removes target contaminant
Effect.
Therefore, the key for being selected to Co metabolism technology of Co metabolism organic carbon source, be related to chlorophenol removal efficiency and
The complexity of microorganism parachlorphenol metabolism.Main process of the dirty water living creature processing technique as sewage treatment field, is faced with
The difficult problem of excess sludge processing.However, excess sludge anaerobic fermentation is answered extensively as a kind of effective Sludge Reduction Technologies
With, by regulation, it can control fermentation in acid phase is produced, stablize and generate short chain acids volatile fatty acid (VFAs), VFAs
A kind of good Co metabolism organic carbon source can be become.Therefore, two kinds of processing units are coupled, subtracting for excess sludge both may be implemented
Quantization, and excess sludge recycling can be provided to carbon source for biological treatment hardly degraded organic substance.Final realization excess sludge
Minimizing, the investment for reducing Co metabolism organic carbon source.
The system that the present invention couples excess sludge fermentation and 2,4,6- trichlorophenol of co -metabolic degradation, with excess sludge anaerobism hair
Zymotic fluid is Co metabolism carbon source, realizes the steady removal of 2,4,6- trichlorophenol.
Summary of the invention
The present invention is directed to during removing hardly degraded organic substance, and Co metabolism organic carbon source is invested excessive problem and remained
The problem of remaining Treatment of Sludge hardly possible proposes a kind of side of excess sludge fermentation coupled biological Co metabolism 2,4,6- trichlorophenols of removal
Method.This method is added to the device that Co metabolism removes 2,4,6- trichlorophenols using excess sludge anaerobic fermented liquid as carbon source, realizes
The removal of trichlorophenol, and the excess sludge that Co metabolism system generates is added to installation for fermenting, to reduce whole processing technology
Excess sludge yield.In addition, the excess sludge that sewage treatment plant generates can be used as fermentation raw material and be added to fermentation system, from
And reach sludge reduction.
A kind of device and method that excess sludge fermentation coupled biological Co metabolism removes 2,4,6- trichlorophenols, device include:
SBR device (1) top is equipped with SBR mixing pump (1-1), and interior lower end is equipped with aeration head (1-2), and aeration head (1-2) is via gas
Flowmeter (1-4) is connect with the aeration pump (1-3) outside SBR device, and 2,4,6- trichlorophenol water tanks (9) pass through SBR intake pump (1-5)
It connect with SBR device (1), is connect by SBR draining pump (1-6) with effluent collection case (2) in the middle part of SBR device (1)；SBR device
Lower part is connect by the first sludge pump (1-7) with secondary sedimentation tank (3), and secondary sedimentation tank (3) upper end is equipped with overflow port (3-2),
The lower end of secondary sedimentation tank (3) is connect by the second sludge pump (3-1) with storage basin (4), storage basin (4) equipped with fresh sludge into
Entrance；Storage basin (4) lower part is connect into dredge pump (4-1) with sludge pretreatment pond (5) by first, under sludge pretreatment pond (5)
End fills (6) with fermentation into dredge pump (5-1) by second and connect, and fermentation, which fills, is equipped with blender (6-1) and heating rod (6-2) in (6)；
Fermentation fills (6) lower end and is connect by fermentation liquid sludge pump (6-3) with fermentation liquid sedimentation basin (7), and fermentation liquid sedimentation basin (7) top is logical
Everfermentation liquid pump (7-1) is connect with fermentation liquid storage bin (8), and fermentation liquid storage bin (8) is filled by fermentation liquid pump (8-1) and SBR
Set (1) connection.
In the present invention, 2,4,6- trichlorophenols and excess sludge process flow are as follows: the water distribution containing 2,4,6- trichlorophenols is by intaking
Water tank enters SBR device, is discharged into header tank by the water outlet that microorganism Co metabolism is handled, and the certain volume periodically discharged
SBR mixing sludge is discharged into secondary settling tank, and after gravitational settling, high concentration sludge enters storage mud box, in addition, just for guarantee system
Often operating, addition are derived from the excess sludge of sewage treatment plant to mud box is stored up, and then, high concentration excess sludge enters pretreatment unit
Heating enters installation for fermenting fermentation by pretreated excess sludge, and fermentation liquid is discharged into fermentation liquid sedimentation basin, by the hair of precipitating
Zymotic fluid enters storage bin, is finally added into SBR, provides carbon source for Co metabolism microorganism.So far, entirely following for system is completed
Ring.
Method and step of the invention are as follows:
Starting and operation:
SBR device: the seed sludge of this system is the sludge of urban wastewater treatment firm secondary sedimentation tank, reaction unit sludge
Concentration maintains between 5000~6000mg/L, and sludge pump 1-7 discharges mixing sludge to secondary settling tank (3) daily, maintains SBR sludge
Between 25~30 days ages；2,4,6- trichlorophenol of water inlet into SBR is stepped up by low concentration until 40~50mg/L of high concentration,
During 2,4,6- trichlorophenol concentration are increased, after water outlet can't detect trichlorophenol, increase water inlet trichlorophenol concentration, directly
It can be with the trichlorophenol of degradable 40-50mg/L to activated sludge；
Fermentor: it is 10 days that fermented sludge, which controls sludge age, maintains 10000~12000mg/L into mud sludge concentration, in
Property fermentation, fermentation temperature maintains 30~31 DEG C；According to sludge age, discharge daily and into the identical fermentation liquid of mud volume, fermentation
Liquid is discharged by fermentation liquid sludge pump (6-3), into fermentation liquid sedimentation basin (7), by precipitating, fermentation liquid sedimentation basin (7) top
Fermentation liquid fermentation liquid holding vessel (8) are pumped by sludge pump (7-1), provide Co metabolism organic carbon source for SBR；Fermentation fills (6) and opens
Dynamic successfully mark is that fermentation liquid SCOD and Vfa Concentration remain invariable substantially.
The processing method in sludge pretreatment pond (5) are as follows: sludge is heated to 100 DEG C, continues 1 hour；
Water distribution containing 2,4,6- trichlorophenols enters SBR device by water tank inlet, make in SBR device trichlorophenol concentration 40~
It between 50mg/L, while being pumped into SBR device (1) by fermentation liquid pump (8-1), includes phenol water distribution by micro- life in SBR device
Water outlet is discharged into header tank after the processing of object Co metabolism, and SBR device is the sludge concentration kept constant and sludge age, need to periodically be discharged mixed
Sludge is closed to secondary settling tank, after gravitational settling, high concentration sludge (sludge concentration is in 10000~12000mg/L) enters storage mud
Case need to additionally add the excess sludge for being derived from sewage treatment plant to mud box is stored up in addition, being the normal operation of guarantee system, then,
Sludge enters pretreatment unit, heats 1 hour for 100 DEG C in sludge pretreatment pond (5), enters fermentation by pretreated sludge
Tank fermentation, the fermentation liquid after fermentation are discharged into fermentation liquid sedimentation basin, and the fermentation liquid by precipitating enters fermentation liquid storage bin, finally,
SBR is added to by carbon source pump, provides carbon source for Co metabolism microorganism；The entire circulation of completion system.
Operation phase SBR device maintains sludge age 25~30 days；Ventilatory capacity is controlled by gas flowmeter, makes sbr reactor device
Interior dissolved oxygen is between 5~6mg/L；Than being 50%, the water conservancy residence time is 20~24 hours for SBR draining.Each cycle intake pump
1-5 adds the trichlorophenol water distribution of certain volume to SBR, maintains in device chlorophenol concentration between 40~50mg/L, meanwhile, lotion
Pump 8-1 each cycle and the mixed carbon source of certain volume be added to sbr reactor device, make reactor internal carbon source concentration 200~
300mg/LSCOD equivalent.
The method that a kind of excess sludge fermentation coupled biological Co metabolism of the present invention removes 2,4,6- trichlorophenols, has
Following characteristics:
(1) waste water containing 2,4,6- trichlorophenols poor for carbon source, using fermentation liquid as Co metabolism carbon source, processed
The dosage that carbon source can be effectively reduced in journey, reduces the cost of the processing of phenol wastewater.
(2) phenol wastewater nitrogen content is poor, and fermentation liquid has the characteristics that high ammonia nitrogen, can be total as the water inlet of SBR
It is metabolized microorganism and nitrogen is provided, improve the removal amount of trichlorophenol.
(3) activated sludge that SBR device generates is directly entered installation for fermenting, reduces the activated sludge of system generation；This
Outside, sewage treatment plant excess sludge can be added to this system, effectively solve the problems, such as that excess sludge is handled.
(4) higher volatile fatty acid belongs to small molecule carbon source in fermentation liquid, can effectively improve 2,4,6- trichlorines
The Co metabolism removal amount of phenol.
Detailed description of the invention
Fig. 1 is the apparatus structure schematic diagram that excess sludge fermentation coupled biological Co metabolism removes 2,4,6- trichlorine phenol method.
In Fig. 1: 1--SBR device, 1-1--SBR blender, 1-2-- aeration head, 1-3-- aeration pump, 1-4-- gas flow
Meter, 1-5--SBR water inlet water pump, 1-6--SBR draining pump, 1-7-- sludge pump；2-- effluent collection case；3-- secondary sedimentation tank, 3-
1-- sludge pump, 3-2-overflow port；4-- storage basin, 4-1-- is into dredge pump；5-- sludge pretreatment pond, 5-1-- is into dredge pump；6-- hair
Ferment fills, 6-1-- blender, 6-2-- heating rod, 6-3-- fermentation liquid sludge pump；7-- fermentation liquid sedimentation basin, 7-1-- fermentation liquid pump；
8-- fermentation liquid storage bin, 8-1-- fermentation liquid pump；9--2,4,6- trichlorophenol water tank.
Specific embodiment:
The present invention is illustrated with reference to the accompanying drawings and examples:
A kind of device and method that excess sludge fermentation coupled biological Co metabolism removes 2,4,6- trichlorophenols, are equipped with SBR and fill
Set 1, SBR mixing pump 1-1, aeration head 1-2, aeration pump 1-3, gas flowmeter 1-4, SBR intake pump 1-5, SBR draining pump 1-6,
Sludge pump 1-7；Effluent collection case 2；Secondary sedimentation tank 3, sludge pump 3-1, overflow port 3-2；Storage basin 4, into dredge pump 4-1；Sludge
Pretreatment pool 5, into dredge pump 5-1；Fermentation filling 6, blender 6-1, heating rod 6-2, fermentation liquid sludge pump 6-3；Fermentation liquid sedimentation basin
7, ferment liquid pump 7-1；Fermentation liquid storage bin 8, ferment liquid pump 8-1；2,4,6- trichlorophenol water tank 9.
The SBR device 1 is aerobic reaction unit, aeration head 1-2 be placed in reactor bottom and gas flowmeter 1-4 and
Aeration pump 1-3 is connected, and blender 1-1 is placed in inside SBR, and 2,4,6- trichlorophenol water tanks 9 pass through intake pump 1-5 and SBR water inlet
It is connected, water outlet is connected by draining pump with effluent collection case 2.Fermentor 6 is equipped with blender 6-1, heating rod 6-2, and respectively
By being connected into dredge pump 5-1, fermentation liquid sludge pump 6-3 with sludge pretreatment pond 5 and fermentation liquid sedimentation basin 7.
In the present invention, 2,4,6- trichlorophenols and excess sludge process flow are as follows: the water distribution containing 2,4,6- trichlorophenols is by intaking
Water tank enters SBR device, makes in device trichlorophenol concentration between 40~50mg/L, and water distribution containing phenol is by microorganism Co metabolism
Water outlet is discharged into header tank after reason, and SBR device is the sludge concentration kept constant and sludge age, need to periodically discharge mixing sludge 100
~120ml is to secondary settling tank, and after gravitational settling, high concentration sludge (sludge concentration is in 10000~12000mg/L) enters storage mud
Case need to add the excess sludge for being derived from sewage treatment plant of certain volume to storing up mud in addition, be the normal operation of guarantee system
Case, keeping sludge concentration in storage basin is 10000~12000mg/L, and then, high concentration excess sludge enters pretreatment unit,
100 degrees Celsius are heated to, continues one hour, enters installation for fermenting fermentation by pretreated sludge, fermentation liquid is discharged into fermentation liquid
Sedimentation basin, the fermentation liquid by precipitating enter fermentation liquid storage bin, are Co metabolism microorganism finally, being added to SBR by carbon source pump
Carbon source is provided.So far, the entire circulation of system is completed.
Embodiment:
Each reaction unit is made of organic glass, SBR and fermentor effective volume 3L, and test water inlet is human configuration
High concentration trichlorophenol containing 2,4,6- water distribution.
Concrete operations are as follows:
1) startup stage: inoculation urban wastewater treatment firm secondary settling tank sludge to SBR device, maintain sludge concentration 5000~
Between 6000mg/L, room temperature-operating is intake as the artificial distribution containing 2,4,6- trichlorophenols, and trichlorophenol adds in such a way that gradient is increased
Add, intake first with the concentration of 10mg/L, after it can't detect 2,4,6- trichlorophenols in water outlet, improves water inlet chlorophenol concentration extremely
20mg/L, until microorganism can be with the trichlorophenol of degradable 40~50mg/L in SBR；It is inoculated with urban wastewater treatment firm secondary settling tank
Sludge is to fermentor, and sludge concentration maintains between 10000~12000mg/L in tank, and running temperature is 30~31 DEG C, remains dirty
Sludge age is 10 days.
2) operation phase:
2.1) SBR device: sludge concentration maintains between 5000~6000mg/L, runs two periods, each period daily
It 12 hours, is controlled by automatic controller.According to sludge concentration and sludge age, mixing sludge 100 is discharged by sludge pump 1-7 daily
~120mL is to secondary settling tank 3, to maintain sludge age 25~30 days.Ventilatory capacity is controlled by gas flowmeter, makes dissolution in reactor
Oxygen is between 5~6mg/L.Than being 50%, the water conservancy residence time is 20~24 hours for SBR draining.Each cycle intake pump 1-5 addition
The trichlorophenol water distribution of certain volume maintains in device chlorophenol concentration between 40~50mg/L to SBR, meanwhile, it is every that lotion pumps 8-1
The mixed carbon source of certain volume is added to sbr reactor device by the period, makes 200~300mg/LSCOD of reactor internal carbon source concentration
Equivalent.
2.2) installation for fermenting: keeping anaerobic environment in installation for fermenting, control fermented sludge age is 10 days, and one is divided between spoil disposal
It, daily by fermentation liquid sludge pump 6-3 discharge 300mL mixed fermentation liquid to fermentation liquid sedimentation basin, while by adding into dredge pump 5-1
Add the mixing excess sludge of 300mL to fermentor, is 10000~12000mg/L into mud sludge concentration, maintains sludge in fermentor
Concentration is 9000~10000mg/L.The pH that ferments is neutrality, is not adjusted in operational process, fermentation temperature maintains 30~31 DEG C；
Mixed fermentation liquid enters fermentation liquid sedimentation basin 7, by precipitating, is discharged into fermentation liquid holding vessel 8 by sludge pump 7-1.
Operation test shows that this system can be with the 2 of 40~50mg/L of steady removal, 4,6- trichlorophenols；Fermentor produces acid amount
For 1000~1200mg/L SCOD；It is discharged COD and meets Effluent criteria in 30~40mg/L, and can't detect trichlorine in water outlet
Phenol.
Claims (2)
1. the device that a kind of excess sludge fermentation coupled biological Co metabolism removes 2,4,6- trichlorophenols characterized by comprising
SBR device (1) top is equipped with SBR mixing pump (1-1), and interior lower end is equipped with aeration head (1-2), and aeration head (1-2) is via gas
Flowmeter (1-4) is connect with the aeration pump (1-3) outside SBR device, and 2,4,6- trichlorophenol water tanks (9) pass through SBR intake pump (1-5)
It connect with SBR device (1), is connect by SBR draining pump (1-6) with effluent collection case (2) in the middle part of SBR device (1)；SBR device
Lower part is connect by the first sludge pump (1-7) with secondary sedimentation tank (3), and secondary sedimentation tank (3) upper end is equipped with overflow port (3-2),
The lower end of secondary sedimentation tank (3) is connect by the second sludge pump (3-1) with storage basin (4), storage basin (4) equipped with fresh sludge into
Entrance；Storage basin (4) lower part is connect into dredge pump (4-1) with sludge pretreatment pond (5) by first, under sludge pretreatment pond (5)
End fills (6) with fermentation into dredge pump (5-1) by second and connect, and fermentation, which fills, is equipped with blender (6-1) and heating rod (6-2) in (6)；
Fermentation fills (6) lower end and is connect by fermentation liquid sludge pump (6-3) with fermentation liquid sedimentation basin (7), and fermentation liquid sedimentation basin (7) top is logical
Everfermentation liquid pump (7-1) is connect with fermentation liquid storage bin (8), and fermentation liquid storage bin (8) is filled by fermentation liquid pump (8-1) and SBR
Set (1) connection.
2. carrying out excess sludge fermentation coupled biological Co metabolism removal 2,4,6- trichlorophenol using device described in claim 1
Method, which comprises the following steps:
(1) startup stage: SBR device: the seed sludge of this system is the sludge of urban wastewater treatment firm secondary sedimentation tank, reaction
Apparatus sewage sludge concentration maintains between 5000~6000mg/L, and sludge pump 1-7 discharges mixing sludge to secondary settling tank (3), dimension daily
It holds between SBR sludge age 25~30 days；Water inlet 2,4,6- trichlorophenol into SBR is stepped up by low concentration until high concentration 40
~50mg/L after water outlet can't detect trichlorophenol, increases water inlet trichlorine during 2,4,6- trichlorophenol concentration are increased
Phenol concentration, until activated sludge can be with the trichlorophenol of degradable 40-50mg/L；
Fermentor: it is 10 days that fermented sludge, which controls sludge age, maintains 10000~12000mg/L, neutrality hair into mud sludge concentration
Ferment, fermentation temperature maintain 30~31 DEG C；According to sludge age, discharge daily and into the identical fermentation liquid of mud volume, fermentation liquid warp
Everfermentation liquid sludge pump (6-3) discharge, into fermentation liquid sedimentation basin (7), by precipitating, the hair on fermentation liquid sedimentation basin (7) top
Zymotic fluid is pumped into fermentation liquid holding vessel (8) by sludge pump (7-1), provides Co metabolism organic carbon source for SBR；Fermentation fill (6) starting at
The mark of function is that fermentation liquid SCOD and Vfa Concentration remain invariable substantially；
The processing method in sludge pretreatment pond (5) are as follows: sludge is heated to 100 DEG C, continues 1 hour；
(2) operation phase, the water distribution containing 2,4,6- trichlorophenols enter SBR device by water tank inlet, keep trichlorophenol in SBR device dense
Degree is pumped into SBR device (1) between 40~50mg/L, while through fermentation liquid pump (8-1), includes phenol water distribution in SBR device
Water outlet is discharged into header tank after the processing of microorganism Co metabolism, and SBR device is the sludge concentration kept constant and sludge age, need to be determined
Phase discharges mixing sludge to secondary settling tank, and after gravitational settling, high concentration sludge enters storage mud box, in addition, for guarantee system
It runs well, need to additionally add the excess sludge for being derived from sewage treatment plant to mud box is stored up, then, sludge enters pretreatment unit,
It is heated 1 hour for 100 DEG C in sludge pretreatment pond (5), enters ferment tank by pretreated sludge, the fermentation after fermentation
Liquid is discharged into fermentation liquid sedimentation basin, and the fermentation liquid by precipitating enters fermentation liquid storage bin, finally, being added to SBR by carbon source pump, is
Co metabolism microorganism provides carbon source；The entire circulation of completion system；
Operation phase SBR device maintains sludge age 25~30 days；Ventilatory capacity is controlled by gas flowmeter, is made molten in sbr reactor device
Oxygen is solved between 5~6mg/L；Than being 50%, the water conservancy residence time is 20~24 hours for SBR draining.Each cycle intake pump 1-5 adds
Add the trichlorophenol water distribution of certain volume to SBR, maintains in device chlorophenol concentration between 40~50mg/L, meanwhile, lotion pumps 8-1
The mixed carbon source of certain volume is added to sbr reactor device by each cycle, makes 200~300mg/ of reactor internal carbon source concentration
LSCOD equivalent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910377028.XA CN110002582A (en) | 2019-05-07 | 2019-05-07 | A kind of method of excess sludge fermentation coupled biological Co metabolism removal 2,4,6- trichlorophenol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910377028.XA CN110002582A (en) | 2019-05-07 | 2019-05-07 | A kind of method of excess sludge fermentation coupled biological Co metabolism removal 2,4,6- trichlorophenol |
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| CN111302492A (en) * | 2020-03-09 | 2020-06-19 | 天津城建大学 | Method for removing phthalic acid ester in water |
| CN111807514A (en) * | 2020-07-23 | 2020-10-23 | 郑州轻工业大学 | Biological treatment method for efficiently removing 2,4, 6-trichlorophenol in wastewater and application |
| CN113045111A (en) * | 2021-03-05 | 2021-06-29 | 山东大学 | Inverted adsorption and precipitation system and process based on carbon source classification and recovery |
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| CN111302492A (en) * | 2020-03-09 | 2020-06-19 | 天津城建大学 | Method for removing phthalic acid ester in water |
| CN111807514A (en) * | 2020-07-23 | 2020-10-23 | 郑州轻工业大学 | Biological treatment method for efficiently removing 2,4, 6-trichlorophenol in wastewater and application |
| CN113045111A (en) * | 2021-03-05 | 2021-06-29 | 山东大学 | Inverted adsorption and precipitation system and process based on carbon source classification and recovery |
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