CN108358313A - Accelerate the biodegradable device and method of Recalcitrant chemicals using excess sludge - Google Patents
Accelerate the biodegradable device and method of Recalcitrant chemicals using excess sludge Download PDFInfo
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- CN108358313A CN108358313A CN201810050077.8A CN201810050077A CN108358313A CN 108358313 A CN108358313 A CN 108358313A CN 201810050077 A CN201810050077 A CN 201810050077A CN 108358313 A CN108358313 A CN 108358313A
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- Prior art keywords
- excess sludge
- bioreactor
- recalcitrant chemicals
- biodegradable
- sludge
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
Abstract
It the present invention relates to the use of excess sludge and accelerate the biodegradable device and method of Recalcitrant chemicals, mainly using including a large amount of organic acids in excess sludge the characteristics of, the release of organic acid in excess sludge is realized by processing methods such as ultrasound, electric pulse or hydropyrolysis process, accelerate list (double) oxygenation in Recalcitrant chemicals biodegradation process, reduction dechlorination etc. reaction as electron donor using these organic acids, and then accelerate the biodegradation of pollutant, meanwhile also solving the problems, such as sludge treatment and recycling.
Description
Technical field
It is utilized the present invention relates to excess sludge and is difficult to dirty (useless) water-treatment technology field of biodegradable industry, especially related to
And a kind of utilization excess sludge accelerates the biodegradable device and method of Recalcitrant chemicals.
Background technology
With the development of society, people increasingly pay attention to the construction of conservation culture now.To all types of industries waste water, especially
Efficient process containing the industrial wastewater for being difficult to biodegradable pollutant has caused the great attention of people.Wherein biodegradation is
A kind of method that people praise highly very much can be with popularity application because biodegradable have preferable economy.Industrial wastewater
Contained in various Recalcitrant chemicals in, their the biodegradation process overwhelming majority is directed to the biology for needing electronics
Reaction, many biological respinses such as such as single Oxygenation, double Oxygenations, reduction dechlorination, the reduction of nitro-aromatic or even denitrification
Process.Wherein preceding 2 kinds are carried out under aerobic condition, rear several, are mainly carried out under the conditions of detesting (scarce) oxygen.Due to being related to
To needing electronics, therefore in these pollutant bioprocesses, it is to accelerate such biology anti-to provide suitable electron donor
The effective means answered.By adding additional electron donor to accelerate the biodegradable method of pollutant, there are many successes
Case.But it is main at present to be still used for the single biological respinse carried out under the conditions of detesting (scarce) oxygen.Such as by the way that electricity is added
Sub- donor accelerates the biological reactions rates etc. of nitrate denitrification, sulfate reduction.But to the biology under aerobic condition
Degradation process (such as single oxygenation or double Oxygenations), especially needs aerobic and anaerobic processes biological respinses, passes through simultaneously
There is provided exogenous electron donor accelerates its reaction rate then almost without report.And accelerated as electron donor using excess sludge
Single (double) Oxygenation, it is almost a blank especially to accelerate the research of single oxygenation and reduction reaction and application simultaneously.
In addition, on the other hand, all generating a large amount of excess sludge daily in many sewage treatment plants, all dirts in China at present
The Treatment of Sludge of water treatment plant and disposition are all a more scabrous things, and half-hearted processing can then lead to secondary pollution.Cause
This, is if biodegradation process is used for after capable of handling excess sludge, especially aerobic or aerobic/anaerobic biological respinse biology drop
On the one hand solution preocess can accelerate the biodegradation of Recalcitrant chemicals, on the one hand can solve conventional sewage processing cost mistake
On the other hand high problem additionally aids the processing and disposition of sludge.
Invention content
Excess sludge is utilized it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of
Accelerate the biodegradable device and method of Recalcitrant chemicals.
The purpose of the present invention can be achieved through the following technical solutions：
Accelerating the biodegradable dress of Recalcitrant chemicals using excess sludge one of the objects of the present invention is to provide a kind of
It sets, includes mainly the excess sludge processing pipeline and difficult for biological degradation sewage water inlet pipe for being separately connected bioreactor import
Road, excess sludge processing pipeline include sequentially connected sludge pump, make the excess sludge of excess sludge release organic acid
Processing unit and separator for mud and water, wherein the supernatant outlet of separator for mud and water connects the bioreactor import.
Preferably, include that excess sludge can be handled to discharge organic acid in the excess sludge processing unit
Ultrasound Instrument, electric impulser or pyrolysis instrument etc..
Preferably, the bioreactor had both had the aerobic fortune for making entire inside bioreactor keep aerobic condition
Row pattern, and include so that entire inside bioreactor aerobic zone and anaerobic zone and the aerobic/anaerobic operational mode deposited.
The second object of the present invention is to provide a kind of utilization excess sludge acceleration biodegradable side of Recalcitrant chemicals
Method includes the following steps：
(1)：Excess sludge is sent in excess sludge processing unit using sludge pump, it is made to complete the release of organic acid；
(2)：Then the excess sludge that organic acid release will be completed in step (1) is sent to separator for mud and water, it is separating obtained on
Clear liquid is vaccinated with together with pending difficult for biological degradation sewage feeding in the bioreactor for the microorganism fungus kind tamed
Biodegradation is carried out, to accelerate the biodegradation of Recalcitrant chemicals.
Preferably, include that excess sludge can be handled to release in the excess sludge processing unit described in step (1)
Put Ultrasound Instrument, electric impulser or the pyrolysis instrument etc. of organic acid.
Preferably, the difficult for biological degradation sewage described in step (2) is that coking, printing and dyeing, chemical industry etc. contain pollution difficult to degrade
The trade effluent of object, representative Recalcitrant chemicals include pyridine, quinoline, phthalic acid, paranitrophenol, nitrobenzene, phenol
Class compound and polycyclic arene compound etc..
Preferably, the effective electron equivalents in step (2) of the present invention contained by the addition foundation supernatant of supernatant
e– EffectivelyThe electron equivalent number e needed with contaminant degradation in treatment sewage– It needsAccording to formula：e– Effectively=5~8e– It needsIt determines,
To ensure that it can provide enough electronics for the bio-degradation reactions in step (2).
Preferably, it when the bio-degradation reactions in step (2) are oxidation reaction and need the bioprocesses of electronics, adjusts
Section bioreactor to keep aerobic condition in entire bioreactor；
When the bio-degradation reactions in step (2) are the biological respinse for being carried out at the same time oxidation and reduction reaction and needing electronics
Process adjusts bioreactor and makes aerobic zone in bioreactor and anaerobic zone and deposit.
The present invention mainly just using including a large amount of organic acids in excess sludge the characteristics of, pass through ultrasound, electric pulse or water
The methods of pyrolysismethod realizes the release of organic acid in sludge, accelerates pollution difficult to degrade as electron donor using these organic acids
The biodegradation of object.It also contributes to solve the problems, such as Treatment of Sludge and disposition and recycling sludge simultaneously.
Using pyridine and quinoline as the incipient degradation approach of example instruction sheet Oxygenation, the biodegradable mistake of initial two step
Journey difference is as depicted in figs. 1 and 2.Pyridine and quinoline belong to the organic matter compared with difficult for biological degradation, they are biodegradable initial
Reaction is single Oxygenation (Mono-oxygenation), which is intracellular electronics (NADH2, it is abbreviated as 2H) and molecular oxygen
(O2) hydroxyl (- OH) is inserted on pyridine ring or phenyl ring by cobasis qualitative response.Usually ensure in biological respinse enough molten
Solve oxygen (O2) be easier.Therefore it is pyridine or the rate-determining steps of quinoline initial reaction process to provide enough electron donors then.
Because after two step list Oxygenations, subsequent pyridine ring or phenyl ring are just easier open loop so that subsequent biology is anti-
It more should be able to successfully carry out.The biodegradation of other persistent organic pollutants for containing phenyl ring or heterocycle all has similar
Reaction process.
In addition, for double Oxygenation processes, by taking the biodegradationpathway of phthalic acid as an example (as shown in Figure 3).It is adjacent
Phthalic acid is a kind of important raw material of industry, but is detected in surface water simultaneously.As can be seen from the figure the reaction
Initial procedure is a double Oxygenation process, and wherein step 3A and 3B is double Oxygenation processes, and step 3D is that single oxygenation is anti-
Answer process.This reaction process be one and meanwhile include single, double oxygenation bioprocesses.
In addition, while for typical case need restore and oxidation process and be all the bioprocesses for needing electronics,
Illustrated by taking the biodegradation process of paranitrophenol as an example, biodegradationpathway as shown in figure 4, figure 4, it is seen that
Preceding 4 step is to need the reduction process of electronics, and step 4E and 4F are then single oxygenation processes.
Therefore, in the biodegradationpathway of such as above-mentioned several organic pollutions, such as organic acid, which is added, can discharge electricity
The donor of son can accelerate the biodegradation rate of these pollutants.By taking the hydrolytic processes such as succinic acid, acetic acid as an example：
C4H6O4+4H2O→4CO2+ 14H (succinic acid hydrolytic process)
C2H4O2+2H2O→2CO2+ 8H (acetolysis process)
Compared with prior art, excess sludge is applied to the biodegradation process of existing Recalcitrant chemicals by the present invention
In, both accelerated the biodegradation of Recalcitrant chemicals, while also effective solution Treatment of Sludge recycling the problem of.
Description of the drawings
Fig. 1 is the schematic diagram of the initial 2 step reaction of pyridine；
Fig. 2 is the schematic diagram of the biodegradationpathway of initial 2 step of quinoline；
Fig. 3 is the schematic diagram of the biodegradationpathway of phthalic acid；
Fig. 4 is the schematic diagram of the biodegradationpathway of p-nitrophenol；
Fig. 5 is the structural schematic diagram of the device of the invention；
Fig. 6 is the comparison degradation effect figure of the embodiment of the present invention 1；
Fig. 7 is the comparison degradation effect figure of the embodiment of the present invention 2；
In figure, 1- sludge pumps, 2- excess sludge processing units, 3- separator for mud and water, 4- sewage pumps, 5- bioreactors.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Each raw material or processing method be unless otherwise noted in following embodiments, then it represents that it is conventionally known original to use
Material or method.
As shown in Figure 5 is a kind of using the excess sludge acceleration biodegradable device of Recalcitrant chemicals, includes mainly
It is separately connected the excess sludge processing pipeline and difficult for biological degradation wastewater influent pipeline, excess sludge of the import of bioreactor 5
Processing pipeline includes sequentially connected sludge pump 1, makes the excess sludge processing unit 2 and muddy water point of excess sludge release organic acid
From device 3, wherein the supernatant outlet of separator for mud and water 3 connects 5 import of bioreactor, difficult for biological degradation wastewater influent pipeline
Then main includes connection 5 import of bioreactor and the sewage pump 4 for conveying difficult for biological degradation sewage.
Above-mentioned excess sludge processing unit can for excess sludge can be provided the release ultrasound of organic acid, electric pulse or
Ultrasound Instrument, electric impulser or the pyrolysis instrument of aquathermolysis environment, main purpose are in order to which the sludge of excess sludge is intracellular
Organic acid etc. releases.
In addition, bioreactor 5 can be regulated and controled and operated according to the property of pollutant, having keeps entire biology anti-
The aerobic operational mode for keeping aerobic condition inside device is answered, and makes entire inside bioreactor aerobic zone and anaerobic zone and deposits
Aerobic/anaerobic operational mode, may be used such as the bioreactor in ZL201510510978.7, can also use existing
Other reactors.
Meanwhile the specific process for carrying out excess sludge processing Recalcitrant chemicals is：It first, will be remaining dirty using sludge pump
Mud is sent in excess sludge processing unit, it is made to release organic acid；Then the excess sludge for completing organic acid release is sent to
Separator for mud and water, separating obtained supernatant have been inoculated with microbiological decomposer together with pending difficult for biological degradation sewage feeding
Biodegradation is carried out in bioreactor, that is, is completed.
The method that excess sludge is ultrasonically treated to obtain supernatant in following embodiment is specially：By probe type ultrasonic instrument
Device is immersed among sludge, and the control frequency by changing ultrasonic probe makes sludge be crushed, and releases cell in sludge
Leachable, such as：Protein, polysaccharide, DNA, COD and BOD etc..Specific ultrasonic processing technique can refer to following documents
(Cao Xiu celerys, old Jun, Ou Yangli wait supersound process experimental study [J] the China water supply and drainage of excess sludges, 2003,19 (2):
58-60)。
Equally, being ultrasonically treated the method that excess sludge obtains supernatant can also use electrical pulse method or hydropyrolysis process to replace
Generation, corresponding electrical pulse method and hydropyrolysis process can refer to following two documents respectively：
(I) An Shaofeng, Wujiang Bohai Sea give as security beautiful honor, wait experimental study [J] the China water supply of high-pressure pulse electrics processing sludge
Draining, 2016 (19):120-123.
(II) Xue Tao, Huang Xia, release characteristics [J] of phosphorus, nitrogen and organic carbon in Hao's Wang Juan excess sludge heat treatment processes
Chinese water supply and drainage, 2006,22 (23):22-25..
Microorganism fungus kind in the present invention used in following embodiments is according to the pollutant contained in handled sewage
Carry out what specific aim was tamed, conventional microbial acclimation method may be used in specific domestication process and method.It is preferred that adopting
With described in following documents microorganism fungus kind and acclimation method：①Bai Qi,Yang Lihui,Li Rongjie,Chen
Bin,Zhang Lili,Zhang Yongming,Rittmann E.Bruce.Accelerating quinoline
biodegradation and oxidation with endogenous electron donors,Environmental
Science and Technology,2015,49(19):11536–11542。②Tang Yingxia,Zhang Yongming,
Yan Ning,Liu Rui,Rittmann Bruce E.The Role of Electron Donors Generated From
UV Photolysis for Accelerating Pyridine Biodegradation,Biotechnology and
Bioengineering,2015,112(9):1792-1800。③Yang Lihui,Zhang Yongming,Bai Qi,Yan
Ning,Xu Hua,Rittmann E Bruce.Intimately coupling of photolysis accelerates
nitrobenzene biodegradation,but sequential coupling slows biodegradation,
Journal of Hazardous Materials,2015,287:252–258。
Embodiment 1
The present embodiment accelerates the biological treatment containing quinoline sewage using the supernatant of excess sludge as electron donor,
Simultaneously organic acid (oxalic acid) is also added into be compared as electron donor.Experiment carries out intermittent degradation in fact by object of quinoline
It tests.Quinoline is a kind of aromatic compound, is widely used in medicine, printing and dyeing, rubber industry.In use and manufacturing process
In, inevitably there are some to leak and enter natural water.Once entering natural water, then harm can be generated to health.This
Outside, quinoline belongs to a kind of organic pollution more difficult to degrade, i.e., carries out biological treatment to it using common biodegradation method
When, degradation rate is slower.
This application example is dropped using the biology for carrying out quinoline in the microbial inoculant to bioreactor tamed
Solution.Specific degradation is divided into 3 groups, and first group is directly degraded quinoline using bioreactor；Second group of addition oxalic acid is as electronics
Donor accelerates the biodegradation of quinoline；The supernatant of the sludge by supersound process is then added in third group.
Experimental result is as shown in Figure 6.As seen from Figure 6, it is added after oxalic acid, the biodegradation rate of quinoline improves
53%, this is because the electronics of oxalic acid release accelerates single Oxygenation of quinoline.And the supernatant of treated sludge is added
After liquid, the biodegradation rate ratio of quinoline adds oxalic acid to improve 14% again, and 75% is improved than direct biodegradation.The result
Illustrate the sludge after supersound process being added in quinoline biodegradation process, can equally play the work of electron donor
With, it will be apparent that accelerate the biodegradation of quinoline.
Embodiment 2
This experiment is using paranitrophenol as object.Paranitrophenol is mainly used as in the fine chemicals such as pesticide, medicine, dyestuff
Mesosome and a kind of organic pollution compared with difficult for biological degradation.Its biodegradation is related to both needing aerobic, it is also desirable to anaerobism
Condition.
It is in the microbial inoculant to bioreactor that will have been tamed first, control operating condition makes the reaction when experiment
Aerobic zone and anaerobic zone can be possessed simultaneously.When specific progress biodegradation, it is divided into 2 groups of progress.First group be paranitrophenol into
Row is directly biodegradable and is added without any electron donor, and second group is that the supernatant of the sludge after being ultrasonically treated is added as electricity
Sub- donor, the results are shown in Figure 7.It can be seen from figure 7 that the supernatant for the sludge being added after being ultrasonically treated causes to nitro
The biodegradation rate of phenol improves 109%.This result shows that, the biodegradation of paranitrophenol can also pass through exogenous electron
The addition of donor and apparent raising.
The above description of the embodiments is intended to facilitate ordinary skill in the art to understand and use the invention.
Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein general
Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to the above embodiments, ability
Field technique personnel announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be the present invention's
Within protection domain.
Claims (8)
1. a kind of accelerating the biodegradable device of Recalcitrant chemicals using excess sludge, which is characterized in that including being separately connected
Excess sludge processing pipeline and difficult for biological degradation wastewater influent pipeline, the excess sludge processing tube of bioreactor import
Road includes sequentially connected sludge pump, makes the excess sludge processing unit and separator for mud and water of excess sludge release organic acid,
In, the supernatant outlet of separator for mud and water connects the bioreactor import.
2. it is according to claim 1 a kind of using the excess sludge acceleration biodegradable device of Recalcitrant chemicals, it is special
Sign is, include in the excess sludge processing unit excess sludge can be handled with discharge organic acid Ultrasound Instrument,
Electric impulser or pyrolysis instrument.
3. it is according to claim 1 a kind of using the excess sludge acceleration biodegradable device of Recalcitrant chemicals, it is special
Sign is that the bioreactor had both had the aerobic operational mode for making entire inside bioreactor keep aerobic condition,
There is the aerobic/anaerobic operational mode for making entire inside bioreactor aerobic zone and anaerobic zone and depositing again.
4. a kind of accelerating the biodegradable method of Recalcitrant chemicals using excess sludge, which is characterized in that include the following steps：
(1)：Excess sludge is sent in excess sludge processing unit using sludge pump, it is made to complete the release of organic acid；
(2)：Then the excess sludge that organic acid release is completed in step (1) is sent to separator for mud and water, separating obtained supernatant
It is sent into the bioreactor for being vaccinated with the microorganism fungus kind tamed and carries out together with pending difficult for biological degradation sewage
Biodegradation, to accelerate the biodegradation of Recalcitrant chemicals.
5. it is according to claim 4 a kind of using the excess sludge acceleration biodegradable method of Recalcitrant chemicals, it is special
Sign is that the excess sludge processing unit described in step (1) is the ultrasound that can provide excess sludge release organic acid, electricity arteries and veins
Ultrasound Instrument, electric impulser or the pyrolysis instrument of punching or aquathermolysis environment.
6. it is according to claim 4 a kind of using the excess sludge acceleration biodegradable method of Recalcitrant chemicals, it is special
Sign is that the difficult for biological degradation sewage described in step (2) contains dirt difficult to degrade for what is generated in coking, printing and dyeing or chemical industry factory
The trade effluent of object is contaminated, the Recalcitrant chemicals include pyridine, quinoline, phthalic acid, paranitrophenol, nitrobenzene, phenols
Compound and polycyclic arene compound.
7. a kind of utilization excess sludge according to claim 4 or 6 accelerates the biodegradable method of Recalcitrant chemicals,
It is characterized in that, the addition of supernatant is according to the effective electron equivalents e contained by supernatant in step (2)– EffectivelyWith pending dirt
The electron equivalent number e that water pollutant degradation needs– It needsAccording to formula：e– Effectively=5~8e– It needsTo determine.
8. it is according to claim 4 a kind of using the excess sludge acceleration biodegradable method of Recalcitrant chemicals, it is special
Sign is that, when the bio-degradation reactions in step (2) are oxidation reaction and need the bioprocesses of electronics, adjusting biology is anti-
Device is answered to keep aerobic condition in entire bioreactor；
When the bio-degradation reactions in step (2) are the biological respinse mistake for being carried out at the same time oxidation and reduction reaction and needing electronics
Journey adjusts bioreactor and makes aerobic zone in bioreactor and anaerobic zone and deposit.
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| CN201810050077.8A CN108358313B (en) | 2018-01-18 | 2018-01-18 | Device and method for accelerating biodegradation of difficultly-degradable pollutants by using excess sludge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607992A (en) * | 2019-01-28 | 2019-04-12 | 沈阳航空航天大学 | The sludge hydro-thermal treatment method of heavy metal in a kind of reduction water phase |
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| CN101602547A (en) * | 2009-06-25 | 2009-12-16 | 大连理工大学 | A kind of method of strengthening the organic wastewater with difficult degradation thereby biological treatment |
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