CN105948251A - Multistage A/O (anoxic/oxic) biomembrane-sludge activation coupled denitrification and dephosphorization device and application thereof - Google Patents
Multistage A/O (anoxic/oxic) biomembrane-sludge activation coupled denitrification and dephosphorization device and application thereof Download PDFInfo
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- CN105948251A CN105948251A CN201610467132.4A CN201610467132A CN105948251A CN 105948251 A CN105948251 A CN 105948251A CN 201610467132 A CN201610467132 A CN 201610467132A CN 105948251 A CN105948251 A CN 105948251A
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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
- C02F3/302—Nitrification and denitrification 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
Abstract
The invention discloses a multistage A/O (anoxic/oxic) biomembrane-sludge activation coupled denitrification and dephosphorization device and a sewage treatment method by using the device. The device comprises a raw water tank, a biomembrane region, a sedimentation tank and a sludge activation reactor. By combining a continuous-flow sectionalized water inlet biomembrane technique with a sludge activation technique, the synchronous nitrification-denitrification process is reinforced to obtain the low-carbon/nitrogen-ratio domestic sewage, thereby implementing the coupled technique with the optimized treatment effects. The speed-separation ball filler is arranged in the biomembrane region to increase the system stability, lower the sludge load, reduce the surplus sludge and enhance the treatment efficiency of the system.
Description
Technical field:
The invention belongs to water-treatment technology field, be specifically related to a kind of multi-stage anaerobic-aerobic biomembrane and live with mud
Change coupling denitrification dephosphorization apparatus and application thereof.
Background technology:
At present, there is serious carbon resource shortage problem in China's urban wastewater treatment firm, and carbon source deficiency not only makes TN
Difficulty up to standard is relatively big, also can cause the problems such as low, the easy loose expansion of sludge concentration.
Beijing's provincial standard one-level B standard, emission limit is COD < 30mg/L, NH4 +-N < 2mg/L,
TN < 15mg/l, TP < 1.5mg/l, TSS < 8mg/l.New standard compares " urban wastewater treatment firm pollutant row
Put standard " one-level emission standard A in (GB18918-2002) is the strictest, and single technique is the most not
Times ' Demand can be met, the series connection of coupling technique, collaborative become particularly important.
The Chinese invention patent one modified model segmental influent multistage A/O of Application No. 201410272114.1 takes off
Nitrogen technique and method for designing thereof are incited somebody to action: sanitary sewage lacks (detesting) oxygen section from first order aerobic section, the 2nd N level respectively
Enter reactor, lack (detesting) oxygen section and be spaced with aerobic section, save the nitrification liquid internal reflux facility of system,
First section transform Aerobic Pond as, saves exteenal reflux facility.It is utilized as denitrifying carbon source according to former water organic carbon maximum
Principle, flow of inlet water and pond district volume are allocated, make load balancing at different levels, system is the most stable.?
Whole lacks addition filler in (detesting) oxygen pond and Aerobic Pond, by biomembrane and segmental influent multistage A/O technique
Organically combine, there is increase system biological amount and biological activity, reduce excess sludge production, improve detergent power
Etc. advantage.
Stream step feed technology is a kind of efficient bio-denitrifying sewage technique continuously, is that recent domestic is newly opened
The biological denitrification process sent out, it has coupled traditional AO biomembrane process, sludge activation technique, has used and click on more
The biological treatment that water mode is intake each section of anoxic zone, combines both advantages and develops processing low C/N
The sewage treatment process more favourable than sanitary sewage.
Summary of the invention:
Stream segmental influent denitrification process has preferable nitrogen removal performance continuously, and the sanitary sewage for relatively low ratio of carbon to ammonium has
Certain process advantage.The present invention combines flowing segmental influent biomembrane process continuously with sludge activation technique,
Utilize strengthening synchronous nitration denitrification denitrogenation effect to seek low ratio of carbon to ammonium sanitary sewage and realize optimization process effect
The coupling technique of fruit.
In order to solve the problems referred to above, present invention firstly provides a kind of multi-stage anaerobic-aerobic (A/O) biomembrane with dirty
Mud activation coupling denitrification dephosphorization apparatus, described device includes that raw water box, biomembrane district, sedimentation tank and mud are lived
Change reactor；
Described raw water box is connected by intake pump and water inlet pipe with biomembrane district；
Described biomembrane district is connected by outlet pipe with sedimentation tank；
It is connected between described sedimentation tank with sludge activation reactor and has sludge reflux pump；
The activated sludge reflux pump of mud in described sludge activation reactor enters biomembrane district；
Described biomembrane district includes some A/O biomembrane unit, and each A/O biomembrane unit is successively by anoxic zone
Form with aerobic zone, the aerobic zone in upper level A/O biomembrane unit and next stage A/O biomembrane unit lack
Oxygen district is separated by deflection plate, and makes sewage form the plural serial stage structure of baffling；
Described A/O biomembrane unit at least two, formation one-level anoxic zone-anoxic zone ,-two grades, one-level aerobic zone-
Two grades of aerobic zones, the order of connection by that analogy, afterbody aerobic zone is connected by outlet pipe with sedimentation tank；
In described A/O unit, the volumetric ratio of anoxic zone and aerobic zone is 1:1-1:3, fully matches nitrification and anti-nitre
The process changed；
Anoxic zone in described A/O biomembrane unit is separated by deflection plate with aerobic zone, and sewage is at the bottom of by anoxic zone
Portion connecting tube enters aerobic zone, and connecting tube is arranged on the lower water surface at 10cm；
Sewage is entered next stage anoxic zone by the connecting tube at top, upper level aerobic zone, and connecting tube is arranged on the water surface
At lower 10cm；
Being respectively provided with water inlet pipe on the wall of limit, described each anoxic zone, the sewage in raw water box enters each anoxia by water inlet pipe
District, installs fluid flowmeter at water inlet pipes at different levels；
Described water inlet pipe position is on the water surface at 10cm；Water inlet pipe uses aperture water distribution uniformity；
Described aerobic zone, anoxic zone are all filled with speed bulb separation filler,
Described speed bulb separation upper strata is reserved 10-20cm and is stablized water layer；
Described speed bulb separation filler is internal is volcanic rock；
Bottom described anoxic zone and aerobic zone, microporous aeration disc is installed；
Described anoxic zone microporous aeration disc aeration intensity controls at water outlet dissolved oxygen less than 0.5mg/L；
Described aerobic zone microporous aeration disc aeration intensity controls at water outlet dissolved oxygen more than 2.0mg/L.
The present invention also provides for a kind of method utilizing said apparatus to carry out sewage disposal, specifically comprises the following steps that
(1) sewage in raw water box simultaneously enters A/O at different levels biology by water inlet pipe under the effect of intake pump
Anoxic zone in film unit, higher level anoxic zone is 3:1-1:1 with the water inlet ratio in subordinate's anoxia interval；
(2) sewage passes through connecting tube continuously across multi-stage alternate anoxic zone and aerobic zone: sewage is in one-level anoxia
District, after pretreatment and returned sludge denitrogenation, enters one-level aerobic zone, organics removal and ammonia nitrogen；One-level is good
After the water outlet of oxygen district mixes with two grades of anoxic zone water inlets, organics removal, ammonia nitrogen and total nitrogen；Two grades of aerobic zones enter one
Step organics removal and ammonia nitrogen, by that analogy；
Described anoxic zone and aerobic zone are respectively provided with the internal fast bulb separation filler for volcanic rock, and speed bulb separation upper strata is reserved
10-20cm stablizes water layer, the microorganism amount reproduction of filling surface attachment, forms biomembrane, when sewage flows through
With the speed bulb separation speed as filler divide pond time, owing to speed bulb separation internal resistance is big, flow velocity is slow, and suspended solids is blocked
Inside ball, between ball, resistance is relatively small, and flow velocity is fast, and current easily pass through, the float in sewage just in ball with
And ball surface aggregation, the water discharge device after process, make sewage achieve solid-liquid separation, be gathered in ball surface with
And the Organic substance within ball is adsorbed by active biological film, degraded；
(3) sewage enters sedimentation tank, the clear liquid in sedimentation tank by outlet pipe after the process in biomembrane district
By outlet draining, partly precipitated is discharged through mud discharging mouth, and partly precipitated then enters under the effect of sludge reflux pump
Enter sludge activation reactor to recycle, under the effect of activated sludge reflux pump, after aeration 2h, be back to each lacking
Oxygen district；
Activated sludge carries out flocculation adsorption to the dissolubility in sewage and suspension polluter and forms precipitability
The mud that energy is good, and then adsorbed by speed bulb separation, under anaerobic it is decomposed through hydrolysis, liquefies, for
Denitrification provides carbon source；The undegraded excess sludge totally of part flows out speed bulb separation, aoxidizes at aerobic environment
Decomposing, the mud of remaining is caught in speed bulb separation again, and final major part organic sludge is thoroughly digested, and reaches
To sludge reduction effect.Water side, aerobic zone nitrification liquid is back to head end through second pond and sludge activation device and lacks
There is Denitrification strengthened denitrification effect in oxygen district.
Beneficial effect:
1, the present invention uses multipoint water feeding anoxic-aerobic process to have following advantage: (1) sewage is evenly distributed to lack
Oxygen district, load balancing, the denitrifying bacterium of anoxic zone makes full use of into the Organic substance denitrification in water, makes full use of
Dirty Organic substance in water, in the case of influent quality fluctuation is relatively big, it is ensured that stable removal effect.(2) theoretical
The most nitric efficiencies of upper segments are the highest, and anoxia section consumes a large amount of carbon sources, carries to the growth of aerobic zone nitrobacteria
For favourable environment.(3) improve the utilization rate of carbon source, effective carbon source is used for denitrification denitrogenation, keeps away simultaneously
Exempt from too much carbon source and be directly entered aerobic zone, reduce the direct carbonization effect of carbon source and oxygen, reduce carbon source loss.
The carbon source dosage of low carbon-nitrogen ratio sewage can be reduced, be even not required to add carbon source and can realize preferable denitrogenation effect
Really.
2, this technology use multi-stage anaerobic Aerobic Pond be in series with following advantage: (1) nitrification liquid is aerobic from each section
District is directly entered next section of anoxic zone, need not arrange nitrification liquid internal reflux facility, simplify technological process, saves
Power cost；(2) denitrification water outlet is directly entered aerobic zone, compensate for nitration reaction pair to a certain extent
The demand of basicity, decreases basicity material dosage；(3) the simplest to the upgrading of existing sewage treatment plant
Single, sewage only need to be changed into segmental influent and enter main body reaction cell body, part cell body changes anoxia into and runs, other
Facility is without changing.
3, technology of biological membrane is used can to improve sludge concentration in the case of the reaction tank constancy of volume, in addition biological
The mud much longer average mud making whole biological tank in age of mud specific activity in the age mud of film increases substantially age, therefore,
Sludge loading is much lower, and treatment effeciency is high, and system is more stable.The large specific surface area that speed bulb separation has
Characteristic is conducive to the metazoal generation of protozoacide, promotes microorganism predation effect, reduces excess sludge.Speed point
It is likely to be formed anaerobic environment, the growth of suitable denitrifying bacterium, in fact it could happen that synchronous nitration and denitrification inside ball, carries
The denitrification ability of high system.
4, through sludge activation device aeration activate after mud can the consolidation system removal effect to pollutant, live
Change sludge reflux and a part of carbon source both can be provided, the treatment effect of sludge reduction can be reached again.
5, the present invention utilizes the preposition pretreatment in one-level anoxic zone and sludge reflux denitrogenation, two grades of anoxic zones to synchronize nitre
Change denitrification denitrogenation；One-level aerobic zone is utilized to make Organic substance and ammonia nitrogen up to standard；Two grades of aerobic zones are utilized to go further
Except Organic substance and ammonia nitrogen；Utilize native system, COD < 30mg/L, NH4 +-N < 2mg/L, TN < 15mg/l,
TP < 1.5mg/l, TSS < 8mg/l.Reduced investment of the present invention, floor space are few, operation maintenance simply, the suitableeest
The supplementary water of surface water and groundwater it is used as after sewage disposal.
Accompanying drawing explanation
The one multistage A/O biomembrane of Fig. 1 present invention couples denitrification dephosphorization system schematic diagram with sludge activation.
Wherein, the 1-raw water box 2-intake pump 3-fluid flowmeter 4-gas glass rotameter 5-first order
Bis-grades of aerobic zone 9-sedimentation tank 10-outlets of 6-one-level aerobic zone, anoxic zone bis-grades of anoxic zone 8-of 7-
11-sludge reflux pump 12-sludge activation reactor 13-activated sludge reflux pump 14-air compressor 15-
Air control valve 16-microporous aeration disc 17-mud discharging mouth 18-water inlet pipe 19-outlet pipe 20-speed bulb separation filler.
Detailed description of the invention
Embodiment 1: a kind of multistage A/O biomembrane couples denitrification dephosphorization apparatus and processes dirt with sludge activation
The method of water
As it is shown in figure 1, a kind of multistage A/O biomembrane couples the sewage disposal system of denitrogenation dephosphorizing with sludge activation
System, including raw water box 1, biomembrane district, sedimentation tank 9 and sludge activation reactor 12；
Described raw water box 1 is connected by intake pump 2 and water inlet pipe 18 with biomembrane district；
Described biomembrane district is connected by outlet pipe 19 with sedimentation tank 9；
It is connected between described sedimentation tank 9 and sludge activation reactor 12 and has sludge reflux pump 11；
The activated sludge reflux pump of mud 13 in described sludge activation reactor 12 enters biomembrane district；
Described biomembrane district includes two A/O biomembrane unit, forms one-level anoxic zone 5-one-level aerobic zone 6-
The type of attachment of bis-grades of aerobic zones 8 of two grades of anoxic zone 7-, is all separated by deflection plate between adjacent area, and two grades good
Oxygen district 8 is connected by outlet pipe 19 with sedimentation tank 9；
The volumetric ratio of anoxic zone and aerobic zone is 1:1, fully matches the process of nitrification and denitrification；
Anoxic zone is separated by deflection plate with aerobic zone, and sewage is entered aerobic zone by connecting tube bottom anoxic zone, even
Adapter is arranged on the lower water surface at 10cm；
The sewage of one-level aerobic zone is entered two grades of anoxic zones by the connecting tube at top, and connecting tube is arranged on underwater
At 10cm；
It is respectively provided with water inlet pipe 18 on the wall of limit, each anoxic zone, fluid flowmeter 3, raw water box are installed at water inlet pipes at different levels
Sewage in 1 enters each anoxic zone by water inlet pipe 18；
Described water inlet pipe position is on the water surface at 10cm；Water inlet pipe uses aperture water distribution uniformity；
Described aerobic zone, anoxic zone are all filled with the internal fast bulb separation filler 20 for volcanic rock,
Described speed bulb separation upper strata is reserved 20cm and is stablized water layer；
Microporous aeration disc 16 is installed bottom described anoxic zone and aerobic zone；
Described anoxic zone microporous aeration disc aeration intensity controls at water outlet dissolved oxygen less than 0.5mg/L；
Described aerobic zone microporous aeration disc aeration intensity controls at water outlet dissolved oxygen more than 2.0mg/L；
Dissolved oxygen is controlled by air compressor 14, air control valve 15 and gas glass rotameter 4.
The method using said apparatus process sewage:
First paragraph water inlet enters one-level anoxic zone 5 sewage diposal area pretreatment from raw water box 1 through water inlet pipe 18,
Increase Biodegradability of Wastewater, subsequently enter one-level aerobic zone 6, organics removal and ammonia nitrogen, then flow into two grades and lack
Oxygen district 7, with raw water box 1 after the second segment water inlet mixing that water inlet pipe 18 enters two grades of anoxic zones 7, passes through
Synchronous nitration and denitrification effect, Organic substance, ammonia nitrogen and total nitrogen are up to standard；Again through two grades of aerobic zones 8, further
Organics removal and ammonia nitrogen；The sewage that two grades of aerobic zone overflows remove enters sedimentation tank 9 through outlet pipe 19.Top layer
Supernatant is discharged through outlet 10, and partial sludge is discharged through discharge pipeline 17.After sludge settling, bottom is returned through mud
Stream pump 11 enters sludge activation reactor 12, and after aeration activation, the activated sludge reflux pump of mud 13 is back to
Enter one-level, two grades of anoxic zones 5,7.
One-level anoxic zone is 1:1 with the water inlet ratio in two grades of anoxias intervals.
Treatment scale of the present invention is 5m3/ d, operating cost is 0.55 yuan/m3；Utilize the life that the present invention processes
Sewage, its water quality character is as follows: TSS:60～100mg/L, CODcr:150～250mg/L, TN:
25～50mg/L, TP:3.0～7.0mg/L；
Result shows: test COD meansigma methods be 101mg/L, TN meansigma methods be 37.2mg/L, carbon
Nitrogen ratio is 2.72.In theory, denitrification 1g nitrate nitrogen needs to consume 2.86g carbon source, common activated sludge
When method processes this type of low ratio of carbon to ammonium sanitary sewage, carbon source can not all be utilized by denitrifying bacterium, actual denitrification effect
Very poor, water outlet TN is not less than 25mg/L.Processing through the present invention, effluent quality is: CODcr maintains
Below 30mg/L, TN maintain below 15mg/L, TP and maintain below 0.5mg/L, TSS and maintain
Below 8mg/L, NH4 +-N-dimensional is held at below 1.5mg/L.
Claims (10)
1. a multi-stage anaerobic-aerobic biomembrane couples denitrification dephosphorization apparatus with sludge activation, it is characterised in that described device bag
Include raw water box, biomembrane district, sedimentation tank and sludge activation reactor；Described raw water box and enters by intake pump with biomembrane district
Water pipe connects；Described biomembrane district is connected by outlet pipe with sedimentation tank；It is connected between described sedimentation tank with sludge activation reactor
There is sludge reflux pump；The activated sludge reflux pump of mud in described sludge activation reactor enters biomembrane district.
2. a kind of multi-stage anaerobic-aerobic biomembrane as claimed in claim 1 couples denitrification dephosphorization apparatus with sludge activation, and it is special
Levying and be, described biomembrane district includes that at least two A/O biomembrane unit, each A/O biomembrane unit are become reconciled by anoxic zone successively
Oxygen district forms, and the aerobic zone in upper level A/O biomembrane unit is divided by deflection plate with anoxic zone in next stage A/O biomembrane unit
Open, and make sewage form the plural serial stage structure of baffling.
3. a kind of multi-stage anaerobic-aerobic biomembrane as claimed in claim 1 or 2 couples denitrification dephosphorization apparatus with sludge activation,
It is characterized in that, described A/O biomembrane unit is two, forms one-level anoxic zone--two grades, anoxic zone ,-two grades, one-level aerobic zone good
The order of connection in oxygen district, afterbody aerobic zone is connected by outlet pipe with sedimentation tank.
4. a kind of multi-stage anaerobic-aerobic biomembrane as claimed in claim 2 couples denitrification dephosphorization apparatus with sludge activation, and it is special
Levying and be, in described A/O biomembrane unit, the volumetric ratio of anoxic zone and aerobic zone is 1:1-1:3.
5. a kind of multi-stage anaerobic-aerobic biomembrane as claimed in claim 2 couples denitrification dephosphorization apparatus with sludge activation, and it is special
Levying and be, the anoxic zone in described A/O biomembrane unit is separated by deflection plate with aerobic zone, and sewage is connected by bottom anoxic zone
Pipe enters aerobic zone, and connecting tube is arranged on the lower water surface at 10cm；Under the sewage of upper level aerobic zone is entered by the connecting tube at top
One-level anoxic zone, connecting tube is arranged at the 10cm of underwater.
6. a kind of multi-stage anaerobic-aerobic biomembrane as claimed in claim 2 couples denitrification dephosphorization apparatus with sludge activation, and it is special
Levying and be, limit, described each anoxic zone wall is respectively provided with water inlet pipe, the sewage in raw water box enters each anoxic zone by water inlet pipe, respectively
At level water inlet pipe, effusion meter is installed；Described water inlet pipe position is on the water surface at 10cm；Water inlet pipe uses aperture water distribution uniformity.
7. a kind of multi-stage anaerobic-aerobic biomembrane as claimed in claim 2 couples denitrification dephosphorization apparatus with sludge activation, and it is special
Levying and be, described aerobic zone, anoxic zone are all filled with speed bulb separation filler, and described speed bulb separation upper strata is reserved 10-20cm and stablized water layer；
Described speed bulb separation filler is internal is volcanic rock.
8. a kind of multi-stage anaerobic-aerobic biomembrane as claimed in claim 2 couples denitrification dephosphorization apparatus with sludge activation, and it is special
Levy and be, bottom described anoxic zone and aerobic zone, microporous aeration disc is installed；Described anoxic zone microporous aeration disc aeration intensity controls
At water outlet dissolved oxygen less than 0.5mg/L；Described aerobic zone microporous aeration disc aeration intensity controls at water outlet dissolved oxygen more than 2.0mg/
L。
9. one kind uses multi-stage anaerobic-aerobic biomembrane described in claim 1-8 any one to couple denitrogenation dephosphorizing with sludge activation
Device processes the method for sewage, it is characterised in that step is as follows:
(1) sewage in raw water box is simultaneously entered in A/O biomembrane unit at different levels by water inlet pipe under the effect of intake pump
Anoxic zones at different levels；
(2) sewage by connecting tube continuously across multi-stage alternate anoxic zone and aerobic zone: sewage in one-level anoxic zone through pretreatment
And after returned sludge denitrogenation, enter one-level aerobic zone, organics removal and ammonia nitrogen；The water outlet of one-level aerobic zone is entered with two grades of anoxic zones
After water mixing, organics removal, ammonia nitrogen and total nitrogen；Two grades of further organics removal in aerobic zone and ammonia nitrogen, by that analogy；
(3) sewage enters sedimentation tank by outlet pipe after the process in biomembrane district, and the clear liquid in sedimentation tank is arranged by outlet
Water, partly precipitated is through mud discharging mouth discharge, and partly precipitated then enters sludge activation reactor under the effect of sludge reflux pump and reclaims profit
With, under the effect of activated sludge reflux pump, it is back to each anoxic zone after aeration 2h.
A kind of method processing sewage the most as claimed in claim 9, it is characterised in that the water inlet ratio of described anoxic zones at different levels
Example is: higher level anoxic zone: subordinate's anoxia interval=3:1-1:1.
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