CN107445291A - A kind of method that enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid synchronously removes with bisphenol-A - Google Patents
A kind of method that enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid synchronously removes with bisphenol-A Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/00—Biological treatment of water, waste water, or sewage
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Abstract
The present invention provides a kind of method that enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid synchronously removes with bisphenol-A：Sewage after primary deposition is passed through in biofilm reactor, modified sewage sludge basic hydrolysis liquid is added among biofilm reactor water inlet, carrier filler is put into biofilm reactor, regulation water inlet nitrogen source, carry out the removal of nitrogen in sewage and bisphenol-A, the method of the present invention prepares modified sewage sludge basic hydrolysis liquid as additional carbon using excess sludge, minimizing and the recycling of excess sludge can be realized, process operation cost can effectively be reduced, and controllable matter and energy is provided for systemic-function enriching floras, efficient hardening biologic process for treating sewage organic carbon source, improve the removal capacity of nitric efficiency and bisphenol-A.
Description
Technical field
The invention belongs to technical field of biological sewage treatment, and in particular to a kind of based on the strong of modified sewage sludge basic hydrolysis liquid
Change the method that nitrogen in sewage synchronously removes with bisphenol-A.
Background technology
The sewage drainage standard constantly lifted make it that the processing requirement of town sewage is increasingly strict.Nitrogen and Organic Pollution
It is the major pollutants of town sewage, and is widely studied and applied the advantages of biological denitrification process is because of its economical and effective.
However, town sewage organic carbon relative deficiency, causes heterotrophic denitrifying Bacteria to lack electron donor and energy source, is unfavorable for anti-nitre
Change the enrichment and growth of bacterium and the raising of denitrification capability.
The development of modern industry so that town sewage has the characteristics of sanitary sewage is with industrial wastewater mixing, medicine often occurs
The new organic pollution of the difficult degradations such as thing, environmental hormone.Environmental hormone（Environmental Estrogens, EEs）
Claim incretion interferent（EDCs）, there is bio-refractory, octanol-water partition coefficient height, trace to produce the spies such as toxic action
Point, EEs can be combined with organism hormone receptor, made organism endocrine dysfunction or produced the lesions such as carcinogenic teratogenesis, right
Potential impact be present in the mankind and the ecosystem.Bisphenol-A（BPA）It is a kind of exogenous estrogen in environmental hormone, due to routine
Sewage disposal handling process is difficult to organic micro-pollutant of degrading, can be by the Co metabolism mechanism of microorganism in additional carbon condition
Under, its clearance is improved in a manner of mixed-matrix culture.
Additional carbon has proven to denitrification denitrogenation in a kind of highly effective raising sewage biological treatment system
The important method of energy.Obviously, the organic carbon source for increasing sewage biological treatment system can be effectively in removal system nitrogen and
EEs.However, additional carbon improves system operation cost, it is unfavorable for its commercial Application.Sewage disposal system internal carbon source is excavated,
Such as sludge carbon source, the surplus sludge volume of sewage biological treatment system can be effectively reduced, improve the nitrogen removal performance and drop of system
Low bio-denitrifying sewage cost.But particle/flocculent structure of excess sludge and the self―sustaining ability of sludge organism cause list
Pure addition excess sludge can not significantly improve effective biological carbon source of system.How economical and efficient utilize excess sludge, carry
The removal of high Sewage Biological Treatment denitrification denitrogenation and bisphenol-A is urgently open question.
The content of the invention
It is an object of the invention to provide a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid and bisphenol-A are same
The method removed is walked, using the high alkaline fermentation modified sewage sludge of carbon source content, not only makes excess sludge recycling, also effectively improves
The removal capacity of nitric efficiency and bisphenol-A, and runnability is high, operation energy consumption is small, and operating cost is low.
The present invention is for the scheme taken of solution above-mentioned technical problem：It is a kind of based on the strong of modified sewage sludge basic hydrolysis liquid
Change the method that nitrogen in sewage synchronously removes with bisphenol-A：Sewage after primary deposition is passed through in biofilm reactor, biomembrane
Modified sewage sludge basic hydrolysis liquid is added among reactor water inlet, carrier filler, regulation water inlet nitrogen are put into biofilm reactor
Source, carries out the removal of nitrogen in sewage and bisphenol-A, and method of the invention, as carbon source, is provided using modified sewage sludge for denitrifying bacterium
Stable energy source, beneficial to the enrichment and growth of denitrifying bacterium, coordinate biofilm reactor, can effectively remove the nitrogen in sewage
Element, organic matter and bisphenol-A.
Preferably, carrier filler is cellular polyurethane filler or elastic filler, carrier filler hangs or is suspended in reaction
In device, 200 ~ 1000m of packing specific area2/m3, porosity is 40 ~ 90%, and carrier entity product filling rate is 3 ~ 20%, present invention choosing
The carrier filler effective surface area selected is big, is adapted to microorganism adsorption growth, and the loose structure of carrier is able to protect microorganism life
Long breeding, carrier filler proportion are good with water free movement performance close to water so that and carrier can rotate freely in reactor,
Not only promote biomembrane fully to be contacted with pollutant in water body, also add contact and oxygen transfer efficiency of the biomembrane with oxygen,
Treatment effeciency is greatly improved, shortens hydraulic detention time.
Preferably, modified sewage sludge basic hydrolysis liquid and preparation method thereof comprises the following steps：
1）Prepare modified alkali lye：The NaOH solution that concentration is 0.08 ~ 0.12mol/L is taken, being heated to temperature in water bath with thermostatic control is
90 ~ 100 DEG C, NaOH hot solutions are obtained as modified alkali lye；
2）Sludge modification：Sludge is placed in plastic containers and carries out ultrasonic wave and cracks, the rear modification alkali lye added in step 1 and
0.2mol/L 2- amino -3- hydroxyl azophenlyene solution, described sludge, modified alkali lye and 2- amino -3- hydroxyl azophenlyene solution bodies
Product is than being 1:8~12:0.13 ~ 0.2, sealed up for safekeeping after well mixed with plastic foil is closed, place 52 ~ 90h at room temperature, dirt must be modified
Mud mixed liquor；
3）Modified sewage sludge basic hydrolysis liquid extracts：Take the modified sewage sludge mixed liquor screen cloth primary dcreening operation in step 2 to filter and obtain first carry
Liquid, then using the guanite precipitation method remove first extract in particulate matter and phosphorus element, centrifuged supernatant be modified sewage sludge alkalescence
Hydrolyzate, centrifugal force are 6000 ~ 10000rmp, 2.5 ~ 5min of centrifugation time, and modified sewage sludge basic hydrolysis liquid preparation process can be broken
Bad mud granule/flocculent structure, promote microbial cell self-dissolving, cracking discharges nutriment and organic matter, activates thalline table
Face, under the conditions of being somebody's turn to do, be advantageous to the cell rupture of microorganism in sludge, carbon content is high in obtained sludge alkalescence hydrolyzate, adds
2- amino -3- hydroxyl azophenlyene the solution entered can not only effectively improve the activity of enzyme in sludge, reduce influences of the pH to enzyme, can also promote
Enter the fracture of the organic molecule such as polysaccharide, protein chain, promote organic matter to be peeled off with organism, improve microbial cell content
Release.
Preferably, first carrying out ultrasonic wave before the modified alkali lye of sludge addition cracks pretreatment, what the ultrasonic wave cracked
Optimum condition is：Ultrasonic frequency is 18 ~ 21kHz, and it is 12 ~ 17min to crack the time, and ultrasonic wave cracks pretreatment in advance has cavitation
Effect, fuel factor and dispersion effect, the flock structure of sludge can be effectively destroyed, discharge moisture and organic matter in zoogloea,
The carbon content in sewage disposal is improved, reduces the preparation condition requirement of basic hydrolysis, reduces energy consumption needed for preparing.
Preferably, the guanite precipitation method are：Mg (OH) is added into first extract2With the mixed liquor of NaOH solution, regulation
First extract pH is 8.4 ~ 9.7, adds Na2HPO4·12H2O solution, adjust n in mixed liquor（Mg）：n（N）：n（P）Than for 1.18 ~
1.26:1.02~1.06:1,18 ~ 23min is stirred in the case where rotating speed is 150 ~ 230r/min, staticly settles 21 ~ 25min, guanite sinks
Shallow lake method is a chemical precipitation reaction, generates indissoluble double salt MgNH4PO4·6H2O, the synchronous removal of phosphorus element and ammonia nitrogen under the conditions of being somebody's turn to do
Rate is high, and will not produce secondary pollution.
Preferably, modified sewage sludge basic hydrolysis liquid need to additionally add trace element：AlCl3、CuSO4•5H2O、FeSO4With
H3BO3, the micro- weight ratio of the addition is followed successively by 1:0.87~0.92:0.97~1.1:0.84 ~ 0.93, trace element
Addition can provide zymoexciter and growth factor for the microorganism in sewage disposal process, improve activated sludge metabolism live
Property, so as to improve the clearance of Sewage Biological Treatment denitrification denitrogenation and bisphenol-A, reduce processing cost.
Preferably, modified sewage sludge basic hydrolysis liquid is made an addition among biofilm reactor water inlet, modified sewage sludge alkaline water
Solution liquid addition is with entering water volume ratio for 1:28 ~ 72 so that biofilm reactor water inlet C/N ratios are 4.6 ~ 9.3, anti-under the conditions of being somebody's turn to do
Answer the water inlet C/N in device suitable so that operation of sewage disposal system performance improves, and the growth and breeding of microorganism is good, nitrogen and double
Phenol A removal capacity is significantly improved.
Preferably, it is granule sludge or floc sludge that modified sewage sludge basic hydrolysis liquid, which prepares sludge used, particle is dirty
Mud and floc sludge can be modified preparation, and prepared modified sewage sludge basic hydrolysis liquid can be used as high-quality carbon source.
Compared with prior art, beneficial effects of the present invention are:1）Mud granule/cotton-shaped is destroyed using alkaline fermentation process
Structure, promote microbial cell self-dissolving, cracking discharges nutriment and organic matter, activates phage surface, provides excess sludge
While source, the removal capacity of nitric efficiency and bisphenol-A is improved；2）The present invention can effectively remove nitrogen in water body, organic
Thing and bisphenol-A, there is the advantages of runnability is high, operation energy consumption is small, operating cost is low；3）It is prepared by modified sewage sludge basic hydrolysis liquid
During the 2- amino -3- hydroxyl azophenlyene solution that adds can not only effectively improve the activity of enzyme in sludge, reduce shadows of the pH to enzyme
Ring, may additionally facilitate the fracture of the organic molecule such as polysaccharide, protein chain, promote organic matter to be peeled off with organism, it is thin to improve microorganism
The tolerant release of intracellular.
Embodiment
It is described in further detail with reference to embodiments：
Embodiment 1：
A kind of method that enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid synchronously removes with bisphenol-A：Will be through first heavy
Sewage behind shallow lake is passed through in biofilm reactor, modified sewage sludge basic hydrolysis liquid is added among biofilm reactor water inlet, in life
Carrier filler is put into thing membrane reactor, regulation water inlet nitrogen source, carries out the removal of nitrogen in sewage and bisphenol-A, after the completion of removal, then
Pass through secondary sedimentation tank water outlet.
Modified sewage sludge basic hydrolysis liquid is entered in biofilm reactor by water inlet pipe in minimizing technology, and water inlet inside pipe wall applies
Release coating is covered with, the composition and parts by weight of release coating are：46 ~ 83 parts of chlorosulfonated polyethylene, 6 ~ 17 parts of graphite, ethylenediamine
0.03 ~ 0.08 part of five sodium of tetramethylene phosphonic acid, 1 ~ 1.5 part of molybdenum disulfide, release coating is coated in water inlet inside pipe wall, at drying
Anti-stick coating is formed after reason, the anti-adhesion performance into water inside pipe wall can be effectively improved, the sodium of ethylenediamine tetramethylene phosphonic acid five can improve
Intermolecular bonding energy, promote each composition compatible, improve the film forming and sag resistance of coating, so as to improve the antistick characteristic of coating, subtract
Nutritional ingredient is in the attachment of water inlet inside pipe wall, raising modified sewage sludge basic hydrolysis liquid utilization in few modified sewage sludge basic hydrolysis liquid
Rate, matter and energy is provided for systemic-function enriching floras, and then increase and remove intensity.
Modified sewage sludge basic hydrolysis liquid and preparation method thereof comprises the following steps：
1）Prepare modified alkali lye：The NaOH solution for taking concentration to be 0.11mol/L, temperature is heated in water bath with thermostatic control as 93 DEG C,
NaOH hot solutions are obtained as modified alkali lye；
2）Sludge pretreatment：Sludge is taken, is 20kHz in ultrasonic frequency, the time is cracked and is broken to carry out ultrasonic wave under the conditions of 15min
Solution, obtains breaking sludge；
3）Sludge alkaline fermentation：Obtained breaking sludge in step 2 is taken, adds obtained modified alkali lye and 0.2mol/ in step 1
L 2- amino -3- hydroxyl azophenlyene solution, breaking sludge, modified alkali lye and 2- amino -3- hydroxyl azophenlyene liquor capacities ratio are 1:
10:0.16, sealed up for safekeeping after well mixed with plastic foil is closed, place 87h at room temperature, obtain sludge fermentation liquid, basic hydrolysis liquid system
Standby process can destroy mud granule/flocculent structure, promote microbial cell self-dissolving, and cracking discharges nutriment and organic matter,
Activate phage surface, should under the conditions of, be advantageous to the cell rupture of microorganism in sludge, carbon in obtained sludge alkalescence hydrolyzate
Content is high, and the 2- amino -3- hydroxyl azophenlyene solution of addition can not only effectively improve the activity of enzyme in sludge, reduces shadows of the pH to enzyme
Ring, may additionally facilitate the fracture of the organic molecule such as polysaccharide, protein chain, promote organic matter to be peeled off with organism, it is thin to improve microorganism
The tolerant release of intracellular, its mechanism of action are still not clear, and need further to be studied；
4）Prepare modified sewage sludge basic hydrolysis liquid：Obtained sludge fermentation liquid in step 3 is taken, is obtained with the filtering of screen cloth primary dcreening operation and just carried
Liquid, Mg (OH) is added into first extract2With the mixed liquor of NaOH solution, regulation first extract pH is 9, adds Na2HPO4·12H2O
Solution, adjust n in mixed liquor（Mg）：n（N）：n（P）Than for 1.23:1.05:1,19min is stirred in the case where rotating speed is 170r/min,
Staticly settle 22min, be 8000rmp in centrifugal force, centrifuged under the conditions of centrifugation time 3min, take supernatant, add weight ratio according to
Secondary is 1:0.91:0.98:0.87 AlCl3、CuSO4•5H2O、FeSO4And H3BO3Trace element, stirring are stood, and produce modified dirt
Mud basic hydrolysis liquid.
The prior art of routine techniques dawn known to those skilled in the art in the present embodiment, is not chatted in detail herein
State.
Embodiment 2：
A kind of method that enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid and bisphenol-A synchronously remove, during experimental implementation,
6 sequencing batch biofilm reactors of test run（R1~R6）, effective volume 1.45L, carrier filler is cellular polyurethane filler,
Packing specific area 1000m2/m3, porosity 90%, carrier entity product filling rate is 3%；It is prepared by modified sewage sludge basic hydrolysis liquid
Sludge used includes granule sludge, and moisture percentage in sewage sludge 40%, first in the case where frequency is 19kHz, ultrasonic wave cracks 14min；Preparation changes
Property alkali lye be NaOH hot solutions, NaOH concentration 0.08mol/L, temperature be 100 DEG C；Ultrasonic wave breaking sludge is placed in into plastics to hold
In device, add the 2- amino -3- hydroxyl azophenlyene solution of modified alkali lye and 0.2mol/L, sludge, modified alkali lye and with 2- amino -3-
Hydroxyl azophenlyene liquor capacity ratio is 1:8:0.13, sealed up for safekeeping after well mixed with plastic foil is closed, place 72h at room temperature；Afterwards
Filtered with screen cloth primary dcreening operation and obtain first extract, Mg (OH) is added into first extract2With the mixed liquor of NaOH solution, regulation first extract pH
For 8.5, Na is added2HPO4·12H2O solution, adjust n in mixed liquor（Mg）：n（N）：n（P）Than for 1.19:1.03:1, in rotating speed
To stir 21min under 200r/min, 23min is staticly settled, centrifuged supernatant is modified sewage sludge basic hydrolysis liquid, centrifugal force
For 6000rmp, centrifugation time 2.5min, modified sewage sludge basic hydrolysis liquid additionally adds trace element Al Cl3、CuSO4•5H2O、
FeSO4And H3BO3, add weight ratio and be followed successively by 1:0.87:0.97:0.84；Sludge alkalescence hydrolyzate is added to be supplementary carbon source and mix
It is even, R2~R6The modified sewage sludge basic hydrolysis liquid of middle dosing respectively is respectively 1 with entering water volume ratio:144、1:72、1:47、1:35、
1:28, corresponding biofilm reactor water inlet C/N ratios respectively 4.6,6.1,7.0,9.3 and 11.1, reactor R1Do not add dirt
Peat source compares, and its C/N ratio is 2.1.
6 sequencing batch biofilm reactors of test run use manual simulation's sewage, NH in sewage4 +-N、NO3 --N、
NO2 -- N and PO4 3-- P concentration be respectively 0.13 ± 0.05mg/L, 23.54 ± 0.59mg/L, 0.02 ± 0.02mg/L, 18.59 ±
0.36mg/L, average pH is 7.15, and bisphenol-A influent concentration is the μ g/L of 964.3 μ g/L ± 106.4.
The daily denitrification amount of experiment gained and bisphenol-A clearance such as following table：
It can be obtained, be gradually stepped up with C/N ratios, NO by above table3 -- N average removal rates are promoted to 84.8% from 29.4%, and nitrate nitrogen is gone
Except performance significantly improves；R1~R6The daily denitrification amounts of TN it is in rising trend, TN average removal rates are increased to 70.4% from 28.1%,
Biomembrane denitrification capability is improved significantly, R1~R6BPA clearances be 81.5% ~ 87.8%, R3Clearance highest, same nitrogen
Bisphenol-A removal capacity significantly improves when C/N ratios are 6.1 under the concentration of source, therefore the addition of organic carbon source, significantly improves denitrogenation effect
The removal capacity of rate and bisphenol-A.
The prior art of routine techniques dawn known to those skilled in the art in the present embodiment, is not chatted in detail herein
State.
Embodiment 3：
A kind of method that enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid and bisphenol-A synchronously remove, during experimental implementation,
6 sequencing batch biofilm reactors of test run（R1~R6）, effective volume 1.45L, carrier filler is cellular polyurethane filler,
Packing specific area 1000m2/m3, porosity 40%, carrier entity product filling rate is 20%；It is prepared by modified sewage sludge basic hydrolysis liquid
Sludge used includes granule sludge, moisture percentage in sewage sludge more than 60%；Modified sewage sludge basic hydrolysis liquid and preparation method thereof includes following step
Suddenly：First by sludge in the case where frequency is 19kHz, ultrasonic wave cracks 14min, and it is NaOH hot solutions to prepare modified alkali lye, NaOH concentration
For 0.12mol/L, temperature is 90 DEG C；Ultrasonic wave breaking sludge is placed in plastic containers, adds modified alkali lye and 0.2mol/L
2- amino -3- hydroxyl azophenlyene solution, sludge, modified alkali lye and be 1 with 2- amino -3- hydroxyl azophenlyene liquor capacities ratio:12：
0.15, sealed up for safekeeping after well mixed with plastics are closed, place 90h at room temperature；First extract is obtained with the filtering of screen cloth primary dcreening operation afterwards, to
Mg (OH) is added in first extract2With the mixed liquor of NaOH solution, regulation first extract pH is 9.5, adds Na2HPO4·12H2O is molten
Liquid, adjust n in mixed liquor（Mg）：n（N）：n（P）Than for 1.25:1.05:1,20min is stirred in the case where rotating speed is 210r/min, it is quiet
Precipitation 21min is put, centrifuged supernatant is modified sewage sludge basic hydrolysis liquid, centrifugal force 10000rmp, centrifugation time
5min；Modified sewage sludge basic hydrolysis liquid need to additionally add trace element Al Cl3、CuSO4•5H2O、FeSO4And H3BO3, add weight
Than being followed successively by 1:0.9:1:0.88；Modified sewage sludge basic hydrolysis liquid mixes among making an addition to biofilm reactor water inlet, R2~R6In
The modified sewage sludge basic hydrolysis liquid of dosing is respectively 1 with entering water volume ratio respectively:144、1:72、1:47、1:35、1:28, it is corresponding
Biofilm reactor water inlet C/N ratios respectively 4.6,6.1,7.0,9.3 and 11.1, reactor R1Sludge carbon source is not added to oppose
According to its C/N ratio is 2.1.
6 sequencing batch biofilm reactors of test run use manual simulation's sewage, wherein, bisphenol-A influent concentration
For the μ g/L of 964.3 μ g/L ± 106.4, regulation nitrogen concentration is respectively 25mg/L, 35mg/L, 45mg/L, and average pH is 7.15,
HRT=24h, carry out cycle experimental.
It is obtained by experiment：R1~R6When nitrogen concentration is respectively 25mg/L, 35mg/L, 45mg/L denitrification rate respectively from
0.84th, 0.70,0.96mg/L h rise to 2.01,2.53,2.44mg/L h, the horizontal lower R of different nitrogen sources1~R6Denitrification rate
Raised with C/N than increase；The R when nitrogen concentration is 45mg/L6Bisphenol-A clearance be 90.8%, water outlet BPA concentration drop
To 88.6 μ g/L, R during nitrogen concentration 25mg/L, 35mg/L6Bisphenol-A clearance is respectively 81.5%, 76.1%, therefore carbon source concentration
Certain regulation and control nitrogen source can further lift bisphenol-A degradation rate, clearance highest when its nitrogen concentration is 45mg/L.
The prior art of routine techniques dawn known to those skilled in the art in the present embodiment, is not chatted in detail herein
State.
Specific embodiment described herein is only to present invention explanation for example.The technical field of the invention
Technical staff can be made various modifications or supplement to described specific embodiment or be substituted using similar mode, but
Without departing from the present invention's or surmount scope defined in appended claims.
Claims (8)
1. a kind of method that enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid synchronously removes with bisphenol-A, its feature exist
In：Sewage after primary deposition is passed through in biofilm reactor, modified sewage sludge alkali is added among biofilm reactor water inlet
Property hydrolyzate, be put into carrier filler in biofilm reactor, regulation water inlet nitrogen source, carry out the removal of nitrogen in sewage and bisphenol-A.
2. a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid according to claim 1 is synchronous with bisphenol-A
The method of removal, it is characterised in that described carrier filler is cellular polyurethane filler or elastic filler, described carrier filler
Hang or be suspended in reactor, 200 ~ 1000m of packing specific area2/m3, porosity is 40 ~ 90%, carrier entity product filling rate
For 3 ~ 20%.
3. a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid according to claim 1 is synchronous with bisphenol-A
The method of removal, it is characterised in that described modified sewage sludge basic hydrolysis liquid and preparation method thereof comprises the following steps：
1）Prepare modified alkali lye：The NaOH solution that concentration is 0.08 ~ 0.12mol/L is taken, being heated to temperature in water bath with thermostatic control is
90 ~ 100 DEG C, NaOH hot solutions are obtained as modified alkali lye；
2）Sludge modification：Sludge is placed in plastic containers and carries out ultrasonic wave and cracks, the rear modification alkali lye added in step 1 and
0.2mol/L 2- amino -3- hydroxyl azophenlyene solution, described sludge, modified alkali lye and 2- amino -3- hydroxyl azophenlyene solution bodies
Product is than being 1:8~12:0.13 ~ 0.2, sealed up for safekeeping after well mixed with plastic foil is closed, place 52 ~ 90h at room temperature, dirt must be modified
Mud mixed liquor；
3）Modified sewage sludge basic hydrolysis liquid extracts：Take the modified sewage sludge mixed liquor screen cloth primary dcreening operation in step 2 to filter and obtain first carry
Liquid, then using the guanite precipitation method remove first extract in particulate matter and phosphorus element, centrifuged supernatant be modified sewage sludge alkalescence
Hydrolyzate, centrifugal force are 6000 ~ 10000rmp, 2.5 ~ 5min of centrifugation time.
4. a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid according to claim 3 is synchronous with bisphenol-A
The method of removal, it is characterised in that the condition that described ultrasonic wave cracks is：Ultrasonic frequency is 18 ~ 21kHz, cracks the time
For 12 ~ 17min.
5. a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid according to claim 3 is synchronous with bisphenol-A
The method of removal, it is characterised in that the described guanite precipitation method are：Mg (OH) is added into first extract2With NaOH solution
Mixed liquor, regulation first extract pH are 8.4 ~ 9.7, add Na2HPO4·12H2O solution, adjust n in mixed liquor（Mg）：n（N）：n
（P）Than for 1.18 ~ 1.26:1.02~1.06:1,18 ~ 23min is stirred in the case where rotating speed is 150 ~ 230r/min, staticly settle 21 ~
25min。
6. a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid according to claim 1 is synchronous with bisphenol-A
The method of removal, it is characterised in that described modified sewage sludge basic hydrolysis liquid need to additionally add trace element：AlCl3、CuSO4•
5H2O、FeSO4And H3BO3, the micro- weight ratio of the addition is followed successively by 1:0.87~0.92:0.97~1.1:0.84~
0.93。
7. a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid according to claim 1 is synchronous with bisphenol-A
The method of removal, it is characterised in that described modified sewage sludge basic hydrolysis liquid is made an addition among biofilm reactor water inlet, modified
Sludge alkalescence hydrolyzate addition is with entering water volume ratio for 1:28 ~ 72, biofilm reactor water inlet C/N ratios are 4.6 ~ 9.3.
8. a kind of enhanced sewage nitrogen based on modified sewage sludge basic hydrolysis liquid according to claim 1 is synchronous with bisphenol-A
The method of removal, it is characterised in that it is granule sludge or cotton-shaped that described modified sewage sludge basic hydrolysis liquid, which prepares sludge used,
Sludge.
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| CN101602564A (en) * | 2009-07-21 | 2009-12-16 | 南京大学 | A kind of treatment process of coking chemical waste water |
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