CN109761353A - A kind of quick start method of aerobic particle mud technique - Google Patents
A kind of quick start method of aerobic particle mud technique Download PDFInfo
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- CN109761353A CN109761353A CN201910087308.7A CN201910087308A CN109761353A CN 109761353 A CN109761353 A CN 109761353A CN 201910087308 A CN201910087308 A CN 201910087308A CN 109761353 A CN109761353 A CN 109761353A
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Abstract
The invention discloses a kind of quick start methods of aerobic particle mud technique, it include: step 1, it flows up the synchronous water inlet of unperturbed dynamic formula and water outlet: being inoculated with ordinary student sludge living into reactor, sewage is set to enter reactor later, and the upflow velocity for controlling sewage does not disturb sewage is made to add nitrifying bacteria community inhibitor in sewage full of Sludge Bed in reactor under Sludge Bed state；Water inlet effluent weir overflow simultaneously, water-in and water-out are synchronous to be carried out；Step 2, it drains: being aerated in reactor under not overflow situation, set reactor water discharge time by emptying scale；Step 3, it is aerated: air being blasted into reactor using staged DO control mode and is aerated；Step 4, it precipitates: the sedimentation time being determined according to the sludge settling performance that SVI index indicates, and is precipitated by the sedimentation time, by precipitating the mud granule for filtering out settling velocity and being greater than predetermined value, until completing precipitating by the sedimentation time.This method passes through the additive for adding and inhibiting nitrification, is able to achieve the starting of aerobic particle mud technique quickly, and the starting time is shorter, can solve the problem of aerobic particle mud easily disintegrates.
Description
Technical field
The present invention relates to sewage treatment field more particularly to a kind of quick start methods of aerobic particle mud technique.
Background technique
Under specific condition of culture, between microbial cell by physics, chemistry, biological effect can spontaneous flocculation, increasing
It grows to form Granular sludge condensate.In the past 20 years, the sewage disposal technology based on aerobic particle mud rises, researcher's knot
The efficient oxidation characteristic of oxygen animalcule and the high biological concentration of Anaerobic Digestion system and good settling property are got togather, is turned out
Labile organic compound and synchronous denitrification dephosphorizing granular sledge.
In practical application, the formation of aerobic particle mud, it is meant that the technique successfully starts up.Continuous flow reactor and
Sbr reactor device may be used to the culture of aerobic particle mud, and continuous flow reactor is chiefly used in cultivating nitrifying granular activated sludge at present,
And SBR is chiefly used in the aerobic particle mud that culture utilizes organic matter.
On the basis of numerous studies, domestic researcher sums up the four-stage of particle formation.(1) physical action makes
Obtain bacterium and " sludge core " mutually making contact adhesion phase；(2) particle attracts each other to keep many cells to contact, and forms aggregation
The body stage；(3) cell secretes extracellular polymeric, adheres to more bacteriums and polymer, and mud granule forms group's differential period；
(4) Granular sludge formation stable stereochemical structure stage under the action of hydraulic shear.This process is to organic loading, shearing
Power, the requirement of condition of culture such as cycle of operation is more harsh, culture to it is mature and stable generally require 30~90 days even it is longer,
This make aerobic particle mud it is more difficult by large-scale application into Practical Project.In addition, aerobic particle mud is in longtime running
It is more unstable, it is easy to produce particle disintegration, effluent quality is caused to be deteriorated.
Chinese patent application CN201110361536.2 disclose it is a kind of accelerate aerobic particle mud culture method, i.e., to
MgAlCO is added in cotton-shaped activated sludge3- LDH is used as granular sludge promotor, but there are high-solubility oxygen operations to want for the program
It the reasons such as seeks, will cause mass energy waste.It is good that Chinese patent application CN201610841010.7 discloses a kind of fast culture
The method of oxygen granule sludge promotes the growth speed of aerobic microbiological by adding lanthanum compound and neodymium compound into activated sludge
Degree, to reduce aerobic sludge granular object incubation time, but the program is since lanthanum nitrate is explosive material and has bio-toxicity, nitric acid
The reason that neodymium chemical property has pyrolytic unstable, there are still can not large-scale application the problem of.
Summary of the invention
Based on the problems of prior art, the object of the present invention is to provide a kind of the quick of aerobic particle mud technique
Starting method is able to achieve the quick start of aerobic particle mud technique, compared to the aerobic particle mud that other methods are formed, starting
Time is shorter, can solve the problem of aerobic particle mud easily disintegrates.
The purpose of the present invention is what is be achieved through the following technical solutions:
Embodiment of the present invention provides a kind of quick start method of aerobic particle mud technique, comprising:
Step 1, the synchronous water inlet of plug-flow unperturbed dynamic formula and water outlet: it is inoculated with ordinary student sludge living into reactor, makes dirt later
Water enters reactor, and controls the upflow velocity of sewage, makes sewage full of sludge in reactor under Sludge Bed state not disturbing
Bed, adds nitrifying bacteria community inhibitor in the sewage of entrance；Simultaneously, treated sewage is completed out from effluent weir overflow for water inlet
Water process；
Step 2, it drains: carrying out being aerated in the reactor under not overflow situation, set the reaction by emptying scale
The water discharge time of device；
Step 3, it is aerated: air being blasted into the reactor using staged DO control mode and is aerated；
Step 4, precipitating settling step: is determined according to the sludge settling performance of SVI index instruction and locating operation phase
Time, and precipitated by the sedimentation time, the particle that settling velocity is greater than predetermined value is filtered out in precipitation process, until by precipitating
Time precipitating is completed.
As seen from the above technical solution provided by the invention, aerobic particle mud technique provided in an embodiment of the present invention
Quick start method, it has the advantage that:
This method shortens granule sludge incubation time, improves the stability of granule sludge, while it is good to improve tradition
The function of oxygen granule sludge makes it have the function of fabulous synchronous denitrification dephosphorizing.Specifically: (1) adding during water inlet
Add nitrifying bacteria community inhibitor, to inhibit the activity of nitrobacteria always, reduces the nitration reaction occurred in water.It limits simultaneously
The concentration of nitrate nitrogen and nitrite nitrogen, limits the denitrifying bacterium all living creatures using nitration reaction product as substrate in Initial stage of culture water
It is long.The same period can compete the polyP bacteria fast-growth of carbon source with denitrification flora, be gathered into close aerobic particle mud, and compared with
The aerobic particle mud that nitrification inhibitor is turned out, the ratio of the aerobic particle mud polyP bacteria of this method culture are not added
Higher, phosphor-removing effect is more preferably；(2) using the synchronous water inlet/water outlet of plug-flow unperturbed dynamic formula: when reducing previous granule sludge culture pair
It intakes the requirement of high-power high pump speed, it is economical；The method of synchronous water inlet/water outlet reduces total cycle time, into one
Step improves volumetric loading；Anaerobic phosphorus release during water inlet promotes poly- phosphorus to form the alternate environment of anaerobic-aerobic-anoxic
The growth rate for growing to reduce other floras in granule sludge of bacterium, improves the stability of granule sludge.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is schematic diagram before the nitrifying bacteria community of quick start method provided in an embodiment of the present invention inhibits；
Fig. 2 is the removal rate schematic diagram of the nitrifying bacteria community of quick start method provided in an embodiment of the present invention.
Specific embodiment
Below with reference to particular content of the invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
Belong to protection scope of the present invention.The content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field
The well known prior art.
Embodiment of the present invention provides a kind of quick start method of aerobic particle mud technique, and energy fast culture performance is good
Aerobic particle mud, comprising:
Step 1, the synchronous water inlet of plug-flow unperturbed dynamic formula and water outlet: it is inoculated with ordinary student sludge living into reactor, makes dirt later
Water enters reactor, and controls the upflow velocity of sewage, makes sewage full of sludge in reactor under Sludge Bed state not disturbing
Bed, adds nitrifying bacteria community inhibitor in the sewage of entrance；Water inlet simultaneously, treated sewage from effluent weir overflow, water inlet with
Water outlet is synchronous to be carried out；
Step 2, it drains: carrying out being aerated in the reactor under not overflow situation, set the reaction by emptying scale
The water discharge time of device；General water discharge time is a few minutes to dozens of minutes；
Step 3, it is aerated: air being blasted into the reactor using staged DO control mode and is aerated；
Step 4, precipitating settling step: is determined according to the sludge settling performance of SVI index instruction and locating operation phase
Time, and precipitated by the sedimentation time, by precipitating the mud granule for filtering out settling velocity and being greater than predetermined value, until by heavy
Time completion of forming sediment precipitates.
Above method step 1 further include: after the completion of water inlet, one section of progress is not aerated under stirring or state without mixing
Resting stage, when a length of 15~25min of resting stage.
In above method step 1, the concentration that ordinary student sludge living is inoculated with into reactor is 3000~5000mg MLVSS/
L。
In above method step 1, the upflow velocity of sewage is controlled are as follows: 2m/h~5m/h.This upflow velocity will not cause
The disturbance of Sludge Bed in reactor.
Above method step 1 further include: the nitrifying bacteria community inhibitor added in the sewage of entrance is Allyl thiourea, is thrown
Dosage are as follows: adding rear concentration is 5mg/L.The mesh of rapidly cultivating aerobic particle sludge can be reached by adding nitrifying bacteria community inhibitor
's.
In the step 3 of the above method, air is blasted into the reactor using staged DO control mode and is aerated
Are as follows: Initial stage of culture DO control are as follows: DO is controlled after the total sludge quality of 1~5mg/L, granular sledge Zhan reaches 10% are as follows: 0.2~
0.5 mg/L。
Specifically, set blower frequency automatically in the step 3 of the above method, to reactor set in blast certain flow
Air；The air mass flow for blasting reactor is controlled automatically by above-mentioned staged DO value.
In above method step 4, the sludge settling time, shared volume referred to that is, after Unit Weight sludge by SVI index
Number is to determine.It is anti-to release the sedimentation time needed are as follows: 8~50 points after the volume shared by determining precipitating after a certain period of time sludge
Clock.Specifically, reactor starts precipitation process after the aeration of step 3, in this process, sludge settling forms one
Apparent Sludge Bed, sludge and water have an apparent boundary.
Method of the invention passes through the additive for adding and inhibiting nitrification, is able to achieve aerobic particle mud technique and quickly opens
Dynamic, compared to the aerobic particle mud that other methods are formed, the starting time is shorter, can solve what aerobic particle mud easily disintegrated
Problem.Also, the present invention need to only add the additive for inhibiting nitrification during startup, and without persistently adding, therefore,
Usage amount is few, good economy performance, and property is stablized suitable for large-scale popularization application.
The embodiment of the present invention is specifically described in further detail below.
Utilize the quick start method that aerobic particle mud technique of the invention is realized in pilot reactor, wherein each
Reactor diameter 150mm, high 5000mm；Sludge source is Chaoyang District, Beijing City sewage treatment plant aeration tank, and ρ (MLSS) is
6.4g/L, ρ (MLVSS) are 4.0g/L, and SV (sludge settling ratio) is that 47%, SVI (sludge volume index) is 77mL/g.It is municipal dirty
Water is passed directly into reactor after grid and primary sedimentation tank, and sodium acetate is 267-494mgCOD/L, ammonia nitrogen as organic carbon source concentration
Concentration is 35~42mg/L, and phosphate concentration is 4~5mg/L, and Allyl thiourea 10mg/L is added into water outlet；To transporting
After adding a certain amount of Allyl thiourea in capable reactor, it is seen that ammonia nitrogen removal level reduces, and nitration reaction is suppressed.Propylene
Base thiocarbamide is as shown in Figure 1, 2 to the inhibitory effect of nitrification.
The operating procedure of above-mentioned quick start method is as follows:
(1) intake: flooding time is 50~80 minutes, and water inlet passes through sludge blanket in a manner of plug-flow；
(2) drain: water discharge time is 100~300s；
(3) it is aerated: using micro-pore aeration mode, control dissolved oxygen concentration is 2.0mg/L；
(4) precipitate: the sedimentation time is 10~30 minutes, and screening settling velocity is greater than the particle of 4m/h.
After following above step and running 20 days, occur the granule sludge closely knit, surface is smooth in reactor, runs 40 days
The total sludge quality ratio of quality Zhan of granulating (partial size be greater than 0.2mm) sludge is up to 50% afterwards；The settling velocity of granule sludge is
10m/h, and the SVI index of sludge is less than 50ml/gVSS in reactor.With other with actual domestic wastewater culture granule sludge
Experiment is compared, and the time that method of the invention turns out granule sludge is taken 20~40 days early.When cultivating identical number of days, side of the present invention
The SVI index that method is turned out is relatively smaller.
It to sum up can be seen that, the aerobic particle mud that method of the invention can be stable with fast culture, by 20~40 days
Incubation time can turn out aerobic particle mud particle closely knit, that settling velocity is good, substantially reduce training compared to existing method
Support the time；And it is that granule sludge and floc sludge are total that this method, which is able to achieve in reactor in stable operation stage microbe condition,
Operating condition is deposited, using granule sludge is coexisted and floc sludge is able to achieve denitrogenation dephosphorizing process conformity, synchronous denitrifying phosphorus removal, is enabled de-
Nitrogen dephosphorization process carbon source demand amount reduces, and reduces the dosage of total carbon source, so can greatly reduce the operation of sewage treatment plant at
This, the efficient process especially suitable for low-carbon-source concentration sanitary sewage.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (7)
1. a kind of quick start method of aerobic particle mud technique characterized by comprising
Step 1, the synchronous water inlet of up-flow unperturbed dynamic formula and water outlet: being inoculated with ordinary student sludge living into reactor, make later sewage into
Enter reactor, and control the upflow velocity of sewage, so that sewage is full of Sludge Bed in reactor under Sludge Bed state not disturbing,
Nitrifying bacteria community inhibitor is added in the sewage of entrance；Water inlet simultaneously, treated sewage from the reactor effluent weir overflow, into
Water is synchronous with water outlet to carry out；
Step 2, it drains: carrying out being aerated in the reactor under not overflow situation, set the reactor by emptying scale
Water discharge time；
Step 3, it is aerated: air being blasted into the reactor using staged DO control mode and is aerated；
Step 4, it precipitates: the sedimentation time being determined according to the sludge settling performance that SVI index indicates, and is sunk by the sedimentation time
It forms sediment, by precipitating the mud granule for filtering out settling velocity and being greater than predetermined value, until completing precipitating by the sedimentation time.
2. the quick start method of aerobic particle mud technique according to claim 1, which is characterized in that the method step
Rapid 1 further include:
After the completion of water inlet, stirring or state without mixing under carry out one section of resting stage not being aerated, resting stage when a length of 15
~25min.
3. the quick start method of aerobic particle mud technique according to claim 1 or 2, which is characterized in that the side
In method step 1, the concentration that ordinary student sludge living is inoculated with into reactor is 3000~5000mg MLVSS/L.
4. the quick start method of aerobic particle mud technique according to claim 1 or 2, which is characterized in that the side
In method step 1, the upflow velocity of sewage is controlled are as follows: 2m/h~5m/h.
5. the quick start method of aerobic particle mud technique according to claim 1 or 2, which is characterized in that the side
Method step 1 further include: the nitrifying bacteria community inhibitor added in the sewage of entrance are as follows: Allyl thiourea, dosage are as follows: after adding
Concentration is 5mg/L.
6. the quick start method of aerobic particle mud technique according to claim 1 or 2, which is characterized in that the side
In the step 3 of method, air is blasted into the reactor using staged DO control mode and is aerated are as follows:
Initial stage of culture DO control are as follows: DO is controlled after the total sludge quality of 1~5mg/L, granular sledge Zhan reaches 10% are as follows: 0.2~
0.5mg/L。
7. the quick start method of aerobic particle mud technique according to claim 1 or 2, which is characterized in that the side
In method step 4, according to the sludge settling performance of the SVI index instruction determining sedimentation time are as follows: 8~50 minutes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115367880A (en) * | 2022-09-27 | 2022-11-22 | 北控水务(中国)投资有限公司 | Sewage treatment system and method based on aerobic granular sludge |
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