CN109553260A - A kind of apparatus and method based on the pretreated sludge reduction of sludge side - Google Patents
A kind of apparatus and method based on the pretreated sludge reduction of sludge side Download PDFInfo
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- CN109553260A CN109553260A CN201710871982.5A CN201710871982A CN109553260A CN 109553260 A CN109553260 A CN 109553260A CN 201710871982 A CN201710871982 A CN 201710871982A CN 109553260 A CN109553260 A CN 109553260A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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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
- C02F3/308—Biological phosphorus removal
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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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/44—Time
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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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
- C02F2303/00—Specific treatment goals
- C02F2303/06—Sludge reduction, e.g. by lysis
Abstract
A kind of apparatus and method based on the pretreated mud decrement of sludge side belong to sewage treatment field.Device includes sewage raw water box, SBR main reactor, calper calcium peroxide (CaO2) processing unit.Method is that municipal sewage enters SBR main reactor, is pre-processed by sludge side, i.e., is flowed back into sbr reactor device after handling some residual sludge with calper calcium peroxide and realize the minimizing of sludge.This method yield that is simple, easy to operate, can significantly reducing sludge, while calper calcium peroxide (CaO2) addition of processing unit will not influence the effect of sewage denitrification and dephosphorization.Calper calcium peroxide (CaO2) dissolution that can promote cell extracellular polymeric (EPS) is pre-processed to promote sludge degradation, be conducive to develop internal carbon source.The present invention is suitable for the municipal sewage plant of low ratio of carbon to ammonium.
Description
Technical field
Calper calcium peroxide (CaO is used the invention mainly relates to a kind of2) processing activated sludge mode realize mud decrement
Method belongs to sewage treatment field.A calper calcium peroxide has been arranged in parallel during SBR technique secondary settling tank sludge reflux
(CaO2) processing unit, it is flowed back into mainstream sbr reactor device later, subtracting for sludge is realized under the premise of not influencing denitrogenation dephosphorizing
Quantization.
Background technique
Important means of the biological denitrification phosphorous removal technique as municipal sewage biological treatment, utilizes Microbial Communities in Activated Sludge
Metabolism completes degradation to organic pollutant, has suspension with removal or deliquescent biodegradable has
Machine pollutant, to reach the emission request of sewage.Since biologic treating technique treatment effeciency is high, the low advantage of operating cost,
The quantity of Sewage Biological Treatment factory, China rises year by year.Although the removal efficiency to organic matter is high, can also generate a large amount of surplus
Remaining sludge.Contain a large amount of pathogen, heavy metal, nondegradable organic pollutant in sludge, it will if sludge treatment is improper
Serious pollution can be caused to environment.It is well known that excess sludge processing and the expense of disposition account for entire sewage treatment plant's expense
60%.Therefore, the yield for effectively reducing sludge is most important.
The generation rate of excess sludge depends primarily on two aspects: the yield and endogenous respiration speed of microorganism.Sludge
The thinking of minimizing is mainly the yield for reducing microorganism and the endogenous respiration speed for improving sludge.Because micro- in sludge system
Biological endogenous breathing constant is far smaller than its breeding growth rate, therefore the yield for reducing the microorganism of sludge realizes sludge
Minimizing be crucial.Currently, sludge reduction technology mainly makes sludge crushing with physics, chemistry or biological method,
The intracellular contained substance of release improves the biodegradable of excess sludge with this, then again by broken excess sludge
It flows back into aeration tank, is decomposed by the metabolism of activated sludge.
Calper calcium peroxide (CaO2) there is strong oxidizing property, calper calcium peroxide pretreatment can promote cell extracellular polymeric (EPS)
Dissolution be conducive to develop internal carbon source to promoting sludge degradation, and make mud decrement.Therefore in the mistake of Sewage Biological Treatment
Calper calcium peroxide (CaO is applied in journey2) side preprocessing part activated sludge, then flow back into SBR main reactor and develop internal carbon source,
It not only can use carbon source, but also realize the minimizing of sludge under the premise of not influencing denitrogenation dephosphorizing.
Summary of the invention
Sludge side during sbr reactor device is based on the technical problem to be solved in the present invention is to provide one kind to pre-process,
The apparatus and method of mud decrement while not reducing denitrogenation dephosphorizing efficiency.Compared with the method for other mud decrements, the present invention
It is easy to operate, develop internal carbon source, do not influence the effect of denitrogenation dephosphorizing under the premise of realize mud decrement.
Locate in advance in order to solve the above technical problems, being based on sludge side during sbr reactor device the present invention provides one kind
Reason reduces the new technology of sludge yield during sanitary sewage disposal while not reducing denitrogenation dephosphorizing efficiency, which is characterized in that
Sewage raw water box 2, water inlet pipe 1, blow-down pipe 3, drain valve 4,10, drainpipe 5,9, reinforcement blender 7,14, sequence batch reactor with 8,
Sludge pipe 11,20, aeration head 12, calper calcium peroxide (CaO2) processing unit 13, mud valve 15,19, air compressor 16, flowmeter
17, aeration tube 18.SBR process flow is made of 7 stages:
(1), anaerobic phosphorus release part stage, time 90-110min；
(2), aerobic rg is nitrified and is taken the photograph the phosphorus stage, time 30-50min；
(3), anoxic denitrification stage, time 70-90min；
(4), it aerobic nitrification and takes the photograph the phosphorus stage, time 20-40min；
(5), anoxic denitrification stage, time 40-60min；
(6), it aerobic nitrification and takes the photograph the phosphorus stage, time 50-70min；
(7), sedimentation and drawing spoil disposal stage, time 50-70min；
(8), anaerobism is left unused the stage, time 180-200min.
2. one kind is subtracted while not reducing denitrogenation dephosphorizing efficiency based on sludge side pretreatment during sbr reactor device
The new method of sludge yield during few sanitary sewage disposal, steps are as follows with regulation for specific starting:
1) activation system: by the excess sludge of municipal sewage plant or there is the active sludge dispensing of denitrogenation dephosphorizing to arrive
In sbr reactor device 8, make sludge concentration MLSS=3500~4500mg/L in reactor, sbr reactor device is according to claim 1
In process operation reach system for a period of time and reach stable, SRT is 20 days.
2) specific step is as follows when running:
2.1) it has run a cycle, when sludge is in the idle stage, has opened peristaltic pump 21, it is dense in SBR main reactor
The 40~60% of contracting sludge enter calper calcium peroxide processing unit 13 by sludge pipe.By being added to calper calcium peroxide processing unit 13
Calper calcium peroxide, the amount added are 0.06 ± 0.01g CaO2/gVSS.Opening agitating device 14 makes sludge and peroxide in reactor
Change calcium to be uniformly mixed.The pretreated time is 24~30h.
2.2) calper calcium peroxide (CaO2) after the completion of pretreatment, peristaltic pump 22 is opened, sludge passes through all reflux of sewage pipe 11
Into SBR main reactor.
2.3) inlet valve 6 is opened, each period sewage enters sbr reactor device master from water inlet pipe 6 by sewage raw water box 2
Body 8 closes inlet valve 6 after intaking；Opening reinforcement agitating device 7 is sufficiently mixed muddy water in reactor, speed of agitator
For 140-160rmin-1, mixing time 90-110min；
2.4) after anaerobism stirring, air compressor 16 is opened, adjusting flowmeter 17 controls dissolved oxygen (DO) concentration
In 1-1.5mgL-1, the aerobic aeration time is 30-50min；After aerobic, terminate aeration and close air compressor 16, open
7 anoxia stirring of reinforcement agitating device, revolving speed 140-160rmin-1, mixing time 60-80min；
2.5) after anoxia stirring, it is again turned on air compressor 16, adjusting flowmeter 17 makes DO control in 1-
1.5mg·L-1, the aerobic aeration time is 20-40min；After aerobic, closing air compressor 16 terminates aeration, opens stirring
Device 7 is again sufficiently mixed muddy water in reactor, 140-160rmin-1, mixing time 40-60min；Anoxia stirring knot
Shu Hou opens air compressor 16, and adjusting flowmeter 17 makes Dissolved Oxygen concentration Control in 1-1.5mgL-1, the aerobic aeration time
For 50-70min；
2.6) after aerobic, 50-70min is precipitated, to realize mud-water separation；After precipitating, drain valve 10, row are opened
After water, drain valve 10 is closed, mud valve 19 is opened and carries out spoil disposal.In order to stabilize sludge concentration, control sludge age, make reactor
Interior activated sludge concentration is 3500-4500mgL-1；
2.7) peristaltic pump 21 is opened, the 40~60% of thickened sludge enter peroxidating by sludge pipe in SBR main reactor
Calcium treatment unit 13.
2.8) by adding calper calcium peroxide to calper calcium peroxide processing unit 13, the amount added is 0.06 ± 0.01g CaO2/
gVSS.Opening agitating device 14 is uniformly mixed the sludge in reactor with calper calcium peroxide.The pretreated time is 24~30h.
2.9) calper calcium peroxide (CaO2) after the completion of pretreatment, peristaltic pump 22 is opened, sludge passes through all reflux of sewage pipe 11
Into SBR main reactor, the operation of next cycle is carried out.
To sum up, one kind is provided based on sludge side pretreatment during sbr reactor device, does not reduce denitrogenation dephosphorizing efficiency
The apparatus and method of mud decrement simultaneously.Its process for handling city domestic sewage are as follows: sludge passes through a certain amount of calper calcium peroxide
(CaO2) pretreatment, the biomass and activity of ammonia oxidation bacteria (AOB) and nitrite oxidizing bacteria (NOB) will not be reduced.Due to mistake
Calcium oxide have stronger oxidisability, can aoxidize be attached to Sludge Surface extracellular polymeric (main ingredient be protein
With polysaccharide), it is then small-molecule substance (amino by macromolecular substances (protein and polysaccharide etc.) hydrolysis by hydrolysis
Acid and monosaccharide etc.).Calper calcium peroxide (CaO2) into sbr reactor device, this part carbon source be may be used as pretreated sludge reflux
Carbon source needed for denitrification.
Therefore, a kind of dress based on sludge side pretreatment realization sludge reduction during sbr reactor device of the present invention
It sets and method, is had the advantage that compared with the method for existing sludge reduction
(1) a certain amount of calper calcium peroxide (CaO2) pretreatment, ammonia oxidation bacteria (AOB) and nitrite oxidizing bacteria will not be reduced
(NOB) biomass and activity, so the effect of denitrogenation dephosphorizing in sbr reactor device will not be reduced.
(2) since calper calcium peroxide has stronger oxidisability, the extracellular polymeric (master for being attached to Sludge Surface can be aoxidized
The ingredient wanted is protein and polysaccharide), then pass through hydrolysis for macromolecular substances (protein and polysaccharide etc.) hydrolysis
For small-molecule substance (amino acid and monosaccharide etc.), carbon source needed for this part carbon source may be used as denitrification.
(3) dosage of calper calcium peroxide is less, and operating cost is low, easy to operate, can substantially reduce the yield of sludge.
Detailed description of the invention:
Fig. 1 is that the present invention is based on the apparatus structure schematic diagrams of the pretreated sludge reduction of sludge side.
2 it is sewage raw water box in figure, 1 be water inlet pipe, 3 be blow-down pipe, 4 and 10 be drain valve, 5 and 9 is drainpipe, 7 and
14 it is reinforcement blender, 8 is that sequence batch reactor with, 11 and 20 are sludge pipe, 12 are aeration head, 13 are calper calcium peroxide (CaO2) processing
Unit, 15 and 19 are mud valve, 16 are air compressor, 17 are flowmeter, 18 be aeration tube, 21 and 22 are peristaltic pump.
Specific embodiment
For pilot system as shown in Figure 1, each reactor is made of organic glass, the effective volume of sbr reactor device is 8L, mistake
Calcium oxide preatreating reactors effective volume is 2L.Test is using Changsha community life sewage as raw water, specific water quality
As follows: COD concentration is 150~200mg/L；NH4 +- N concentration is 35~45mg/L；TP concentration is 7.8~12.6mg/L.This experiment
One control group for not adding calper calcium peroxide processing is set, remaining operation is all the same.
Concrete operations are as follows:
1) activation system: the activated sludge of municipal sewage plant is added in sbr reactor device 8, is made in reactor
Sludge concentration MLSS=3800mg/L, sludge age (SRT) were controlled at 20 days, and sbr reactor device is according to above-mentioned one section of process operation
Time reaches system and reaches stable,
2) it is as follows that operation is adjusted when running:
2.1) it has run a cycle, when sludge is in the idle stage, has opened peristaltic pump 21, it is dense in SBR main reactor
The 40% of contracting sludge enters calper calcium peroxide processing unit 13 by sludge pipe.By adding peroxide to calper calcium peroxide processing unit 13
Change calcium, the amount added is 0.06 ± 0.01g CaO2/gVSS.Opening agitating device 14 makes sludge and calper calcium peroxide in reactor
It is uniformly mixed.The pretreated time is for 24 hours.
2.2) calper calcium peroxide (CaO2) after the completion of pretreatment, peristaltic pump 22 is opened, sludge passes through all reflux of sewage pipe 11
Into SBR main reactor.
2.3) inlet valve 6 is opened, each period sewage enters sbr reactor device master from water inlet pipe 6 by sewage raw water box 2
Body 8 closes inlet valve 6 after intaking；Opening reinforcement agitating device 7 is sufficiently mixed muddy water in reactor, speed of agitator
For 140-160rmin-1, mixing time 90min；
2.4) after anaerobism stirring, air compressor 16 is opened, adjusting flowmeter 17 controls dissolved oxygen (DO) concentration
In 1-1.5mgL-1, the aerobic aeration time is 30min；After aerobic, terminate aeration and close air compressor 16, open and increase
7 anoxia stirring of power agitating device, revolving speed 140-160rmin-1, mixing time 60min；
2.5) after anoxia stirring, it is again turned on air compressor 16, adjusting flowmeter 17 makes DO control in 1-
1.5mg·L-1, the aerobic aeration time is 20min；After aerobic, closing air compressor 16 terminates aeration, opens stirring dress
Setting 7 is again sufficiently mixed muddy water in reactor, 140-160rmin-1, mixing time 40min；After anoxia stirring,
Air compressor 16 is opened, adjusting flowmeter 17 makes Dissolved Oxygen concentration Control in 1-1.5mgL-1, the aerobic aeration time is
50min；
2.6) after aerobic, 50min is precipitated, to realize mud-water separation；After precipitating, drain valve 10, draining are opened
After, drain valve 10 is closed, mud valve 19 is opened and carries out spoil disposal.In order to stabilize sludge concentration, control sludge age, make in reactor
Activated sludge concentration is 3500-4500mgL-1；
2.7) whole device is run three months.
Test result shows: after stable, the water outlet COD of control is 20~30mg/L, NH4 +- N concentration is 0~1mg/
L, TP concentration are 2~5mg/L, NO2 -The concentration of-N is 0~0.5mg/L, NO3 -The concentration of-N is 10~14mg/L, the production of sludge
Amount is 959.5mgMLSS/d.The operation method result that the present invention uses is as follows: water outlet COD is 30~45mg/L, NH4 +- N concentration
For 0~1mg/L, TP concentration is 1~3mg/L, NO2 -The concentration of-N is 0~0.5mg/L, NO3 -The concentration of-N is 8~12mg/L,
The yield of sludge is 653mgMLSS/d..As it can be seen that the yield amount of sludge can be reduced about when using operation method of the present invention
31.9%, while the removal effect of TN and TP does not influence.
Claims (2)
1. one kind reduces life while not reducing denitrogenation dephosphorizing efficiency based on sludge side pretreatment during sbr reactor device
The new technology of sludge yield in sewage disposal process living, which is characterized in that sewage raw water box 2, water inlet pipe 1, blow-down pipe 3, draining
Valve 4,10, drainpipe 5,9, reinforcement blender 7,14, sequence batch reactor with 8, sludge pipe 11,20, aeration head 12, calper calcium peroxide
(CaO2) processing unit 13, mud valve 15,19, air compressor 16, flowmeter 17, aeration tube 18.SBR process flow is by 7
Stage composition:
(1), anaerobic phosphorus release part stage, time 90-110min；
(2), it aerobic nitrification and takes the photograph the phosphorus stage, time 30-50min；
(3), anoxic denitrification stage, time 70-90min；
(4), it aerobic nitrification and takes the photograph the phosphorus stage, time 20-40min；
(5), anoxic denitrification stage, time 40-60min；
(6), it aerobic nitrification and takes the photograph the phosphorus stage, time 50-70min；
(7), sedimentation and drawing spoil disposal stage, time 50-70min；
(8), anaerobism is left unused the stage, time 180-200min.
2. one kind reduces life while not reducing denitrogenation dephosphorizing efficiency based on sludge side pretreatment during sbr reactor device
The new method of sludge yield in sewage disposal process living, steps are as follows with regulation for specific starting:
1) activation system: by the excess sludge of municipal sewage plant or have the active sludge dispensing of denitrogenation dephosphorizing anti-to SBR
It answers in device 8, makes sludge concentration MLSS=3500~4500mg/L in reactor, sbr reactor device is according to the work in claim 1
Skill operation a period of time reaches system and reaches stable, and SRT is 20 days.
2) specific step is as follows when running:
2.1) inlet valve 6 is opened, each period sewage enters sbr reactor device main body 8 from water inlet pipe 6 by sewage raw water box 2,
After intaking, inlet valve 6 is closed；Opening reinforcement agitating device 7 is sufficiently mixed muddy water in reactor, and speed of agitator is
140-160r·min-1, mixing time 90-110min；
2.2) after anaerobism stirring, air compressor 16 is opened, adjusting flowmeter 17 makes the control of dissolved oxygen (DO) concentration in 1-
1.5mg·L-1, the aerobic aeration time is 30-50min；After aerobic, terminate aeration and close air compressor 16, open reinforcement
7 anoxia stirring of agitating device, revolving speed 140-160rmin-1, mixing time 60-80min；
2.3) after anoxia stirring, it is again turned on air compressor 16, adjusting flowmeter 17 makes DO control in 1-1.5mgL-1, the aerobic aeration time is 20-40min；After aerobic, closing air compressor 16 terminates aeration, opens agitating device 7 again
It is secondary to be sufficiently mixed muddy water in reactor, 140-160rmin-1, mixing time 40-60min；After anoxia stirring, beat
Air compressor 16 is opened, adjusting flowmeter 17 makes Dissolved Oxygen concentration Control in 1-1.5mgL-1, the aerobic aeration time is 50-
70min；
2.4) after aerobic, 50-70min is precipitated, to realize mud-water separation；After precipitating, drain valve 10, draining knot are opened
Shu Hou closes drain valve 10, opens mud valve 19 and carries out spoil disposal.In order to stabilize sludge concentration, control sludge age, make living in reactor
Property sludge concentration be 3500-4500mgL-1；
2.5) peristaltic pump 21 is opened, it is pre- by sludge pipe to enter calper calcium peroxide for the 40~60% of thickened sludge in SBR main reactor
Treatment reactor 13.
2.6) by adding calper calcium peroxide to calper calcium peroxide processing unit 13, the amount added is 0.06 ± 0.01g CaO2/gVSS。
Opening agitating device 14 is uniformly mixed the sludge in reactor with calper calcium peroxide.The pretreated time is 24~30h.
2.7) calper calcium peroxide (CaO2) after the completion of pretreatment, open peristaltic pump 22, it is anti-that sludge by sewage pipe 11 flows back into SBR master
It answers in device, carries out next cycle operation.
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| CN201710871982.5A CN109553260A (en) | 2017-09-25 | 2017-09-25 | A kind of apparatus and method based on the pretreated sludge reduction of sludge side |
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| CN201710871982.5A CN109553260A (en) | 2017-09-25 | 2017-09-25 | A kind of apparatus and method based on the pretreated sludge reduction of sludge side |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113185074A (en) * | 2021-04-12 | 2021-07-30 | 哈尔滨工业大学 | Method for promoting accumulation of sludge anaerobic fermentation short-chain fatty acids by combined pretreatment of free nitrous acid and calcium peroxide |
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| CN113185074A (en) * | 2021-04-12 | 2021-07-30 | 哈尔滨工业大学 | Method for promoting accumulation of sludge anaerobic fermentation short-chain fatty acids by combined pretreatment of free nitrous acid and calcium peroxide |
| CN113185074B (en) * | 2021-04-12 | 2022-10-21 | 哈尔滨工业大学 | Method for promoting accumulation of sludge anaerobic fermentation short-chain fatty acids by combined pretreatment of free nitrous acid and calcium peroxide |
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