CN109734198A - A kind of the dioxygen layer biofilm reactor and wastewater treatment method of wastewater treatment - Google Patents
A kind of the dioxygen layer biofilm reactor and wastewater treatment method of wastewater treatment Download PDFInfo
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Abstract
A kind of dioxygen layer biofilm reactor of wastewater treatment, the water inlet of container body lower part connects intake pump by pipeline, container body top is equipped with continuous effluent mouth, container body bottom of chamber center is equipped with agitating device, in the intracavitary hollow fiber film assembly for being provided as biofilm carrier of container body, the lower end of hollow fiber film assembly connects air inlet pipe, the upstream end of air inlet pipe is sequentially connected air gauge, gas flowmeter, electric air pump, the upper end of hollow fiber film assembly is connect by the tracheae that flows back with the microporous aeration device of the intracavitary setting of container body, and the gas circulatory system is consequently formed；Container body top is equipped with water loop exit, and lower part is equipped with water and recycles import, by reflux water pipe connection between water loop exit and water circulation import, installs water circulating pump on the water pipe that flows back, water circulation system is consequently formed.It is conducive to full aerobic nitrogen removal bacterium and forms dioxygen layer biomembrane in reactor, and provides stable aerobic environment for dioxygen layer biomembrane.The ammonia nitrogen removal frank of high ammonia-nitrogen wastewater is set to reach 80-90%.
Description
Technical field
The present invention relates to field of waste water treatment, in particular to the dioxygen layer biofilm reactor and waste water of a kind of wastewater treatment
Processing method.
Background technique
Ammonia nitrogen in waste water, nitrate nitrogen, the discharge beyond standards of nitrite nitrogen not only pollute environment, but also seriously threaten drink
Water safety.According to " Chinese environmental statistics annual report " (2015) display of Chinese environmental protection portion publication in 2017, national waste water in 2015
Middle ammonia nitrogen discharge amount reaches 229.9 ten thousand tons, accounts for 21.7 ten thousand tons comprising industrial source ammonia nitrogen, agricultural sources ammonia nitrogen accounts for 72.6 ten thousand tons, cities and towns
Life ammonia nitrogen accounts for 134.1 ten thousand tons, and centralized pollution reducing facility discharge ammonia nitrogen accounts for 1.5 ten thousand tons.Wherein, industrial source ammonia nitrogen base
This is all ammonia nitrogen in high density, and the high ammonia nitrogen discharge amount of livestock and poultry cultivation (550,000 tons/year) has accounted for agricultural sources ammonia nitrogen total release
75.8%, and centralized pollution reducing facility ammonia nitrogen discharge is domestic garbage treatment plant (field) and hazardous waste (clinical waste)
Focus on the high ammonia nitrogen landfill leachate of (setting) factory (field).The annual high ammonia nitrogen discharge of estimation as a result, at least accounts in national waste water
The 34% of ammonia nitrogen total emission volumn.Moreover, high ammonia-nitrogen wastewater is because its ammonia nitrogen and organic concentration are high, water quality is changeable, distribution dispersion
The features such as, it is generally difficult to focus on through pipe network into sewage treatment plant, it is lack effectively improvement and supervision and be arbitrarily emitted into more
Each basin is dry, tributary water reticulation system, has aggravated the harm of basin water environment eutrophication.China's economy will be in industrialization and city
City " double quick speed " developing stage, pollutant emission incremental pressure is huge, and to control ammonia nitrogen pollution in water body, China has been promulgated strictly
Pollutant catabolic gene new standard, wherein the primary standard of ammonia nitrogen be 5.0 mg/L.Therefore, nitrogenous effluent, especially high ammonia are realized
Nitrogen waste water is effectively treated and qualified discharge, avoids causing to seriously threaten to natural ecology and human lives, and then protects healthy water
Matter builds good living environment, it has also become social foci concerned by people.
The main method of high ammonia-nitrogen wastewater processing includes physico-chemical process and bioanalysis.Physico-chemical process includes: blow-off method, phosphoric acid money magnesium
The precipitation method, break point chlorination method, catalytic wet air oxidation etc., although this method can comparatively fast realize high-concentration ammonia nitrogen in waste water and organic
The drawbacks of removal of object, but the equipment of its waste water treatment system is at high cost, and since medicine consumption is big, secondary pollution hidden danger, is prominent.
To overcome the problems, such as this, more economical, environmental protection bioanalysis is pushed to be increasingly becoming the common approach for administering high ammonia-nitrogen wastewater.With activity
Sludge (such as A/O, A2/O, oxidation ditch) and biofilm (such as bio-contact oxidation) are the Biochemical method technology of Typical Representative
It is the current leading means for administering high ammonia-nitrogen wastewater.Currently, Biochemical method technology generally use biofilter, biological rotating disk,
Bio-contact oxidation does not have standby and biological fluidized bed etc. to realize.However, bioanalysis denitrogenation core is high activity denitrogenation flora, due to
Microorganism is quite deep by influences such as environmental factors such as temperature, pH, dissolved oxygen (DO), salinity, especially the unstability of dissolved oxygen, easily
So that waste water treatment system hypoxia is occurred, under hypoxia dissolved oxygen as main limiting factor, and then inhibit early period by
The growth for the zoogloea that bacterium is constituted, causing, there is the der Pilz of more bigger serface to be proliferated, and waste water treatment system is caused to be discharged
Water quality is unstable.Existing biofilter, biological rotating disk, bio-contact oxidation do not have standby and biological fluidized bed etc. in operation, all
There is also the unstable realistic situations of microbial environment factor especially dissolved oxygen, cause current high ammonia-nitrogen wastewater processing long-term existence
It is difficult to effectively solve the problems, such as.
Summary of the invention
An object of the present invention is to provide a kind of pair of wastewater treatment for deficiency existing for existing sewage treatment equipment
Oxygen layer biofilm reactor, it is conducive to full aerobic nitrogen removal bacterium and forms dioxygen layer biomembrane in reactor, and raw for dioxygen layer
Object film provides stable aerobic environment.
It is another object of the present invention to provide a kind of dioxygen layer biomembrane for deficiency existing for existing wastewater treatment method
The wastewater treatment method of reactor, it can simplify the process flow of high ammonia-nitrogen wastewater processing, make the ammonia nitrogen removal of high ammonia-nitrogen wastewater
Rate reaches 80-90%, effectively increases the efficiency of high ammonia-nitrogen wastewater processing.
An object of the present invention is achieved in that
A kind of dioxygen layer biofilm reactor of wastewater treatment, the container body including reactor, the container body lower part be equipped with into
The mouth of a river, the water inlet connect intake pump by pipeline, and container body top is equipped with continuous effluent mouth, the bottom of chamber center of the container body
It is described in the intracavitary hollow fiber film assembly avoided agitating device and be provided as biofilm carrier of container body equipped with agitating device
Hollow fiber film assembly is uprightly arranged, and the lower end of hollow fiber film assembly connects air inlet pipe, and the upstream end of the air inlet pipe is successively
Air gauge, gas flowmeter, electric air pump are connected, the upper end of hollow fiber film assembly connects back to flow tube, the reflux tracheae
The microporous aeration device of the intracavitary lower part setting of downstream and container body connect, container body top is equipped with exhaust outlet, the exhaust
The position of mouth is higher than continuous effluent mouth, and the gas circulatory system is consequently formed；The container body top is equipped with water loop exit, and lower part is set
There is water to recycle import, the position of the water loop exit is lower than continuous effluent mouth, leads between water loop exit and water circulation import
The connection of reflux water pipe is crossed, water circulating pump is installed on the reflux water pipe, water circulation system, the water inlet and water inlet is consequently formed
It is equipped with inlet valve between pump, bleeder is equipped between the inlet valve and water inlet, drain valve is installed on the bleeder.
The hollow fiber film assembly is one or more, and each hollow fiber film assembly is by several hydrophobic hollow fibers
Form column structure or curtain structure.
The upper end position of the hollow fiber film assembly is lower than water loop exit, and lower end position is higher than microporous aeration device.
The micropore of the microporous aeration device be it is nanometer level microporous, the position of microporous aeration device is higher than water inlet and water follows
Ring import.
The microporous aeration device is diaphragm type aerator or tube aerator or plate-type aerator.
The aeration tube, aeration plate are made using micropore ceramics.
By adopting the above scheme, make this biofilm reactor be equipped with as biofilm carrier hollow fiber film assembly,
Agitating device and the gas circulatory system, water circulation system both can be oxygenated hollow fiber film assembly by the gas circulatory system,
Liquid phase is supplied oxygen again；In combination with the work of water circulation system and agitating device, can be provided for reactor liquid phase preferably molten
Oxygen environment provides more growing spaces for aerobic microbiological.By hollow fiber film assembly oxygen supply and liquid phase oxygen supply, be conducive to
The full aerobic nitrogen removal bacterium biofilm being attached on hollow fiber film assembly forms dioxygen layer biomembrane, and provides for dioxygen layer biomembrane
Stable aerobic environment.
The hollow fiber film assembly is one or more, and each hollow fiber film assembly is by several hydrophobic hollow fibers
Column structure or curtain structure are formed, carrier can either be provided for Biofilm Colonization, and can supply oxygen for biomembrane.
The upper end position of the hollow fiber film assembly is lower than water loop exit, and lower end position is higher than microporous aeration device；
The micropore of the microporous aeration device be it is nanometer level microporous, the position of microporous aeration device is higher than water inlet and water recycles import.
It can either guarantee that hollow fiber film assembly floods the biomembrane that enables to be attached on hollow fiber film assembly in the liquid phase from anti-
It answers device liquid phase to obtain dissolved oxygen, is enriched with conducive to the high density of aerobic microbiological, high oxygen utilization rate, while realizing to high ammonia-nitrogen wastewater
Efficiently removal.It can be avoided again and greater impact power formed to microporous aeration device because water inlet flow velocity is too fast, reduce bubble to film group
The scouring intensity of part, to provide stable aerobic environment for the outer layer of dioxygen layer biomembrane.
It is another object of the present invention to what is be achieved:
A kind of wastewater treatment method of dioxygen layer biofilm reactor, comprising the following steps:
1) mixed liquor is prepared
Mixed liquor is measured by the effective volume of reactor vessel body, and the mixed liquor includes fluid nutrient medium and full aerobic nitrogen removal bacterium
Agent, wherein the dosage of full aerobic nitrogen removal microbial inoculum is the 3%-10% of reactor vessel body effective volume, remaining is fluid nutrient medium；
2) the biofilm stage
The container body that prepared mixed liquor is at the uniform velocity injected by intake pump from water inlet to reactor is intracavitary, while starting stirring
Device, the revolution control of agitating device make mixed liquor form vortex, when mixed liquor liquid level rises to container body in 15-33r/min
Continuous effluent mouth when, close inlet valve, stop injection mixed liquor, start the reactor water circulatory system water circulating pump, will follow
The flow control of ring water pump in 23.67-45.38ml/min, make mixed liquor through water loop exit, reflux water pipe, water circulating pump from
It is intracavitary that container body is flowed back in water circulation import, allows full aerobic nitrogen removal bacterium to carry out biofilm under mixed liquor recurrent state, while starting gas
The electric air pump of the circulatory system, air enter hollow fiber film assembly through electric air pump, flowmeter, air gauge, make doughnut
It is biofilm oxygen supply that oxygenation state is in inside the membrane cavity of film, and air flow control is in 200-600 ㎎/L, and pressure control is in 3-
8KPa, additional air are entered the liquid phase of reactor by microporous aeration device through reflux tracheae from hollow fiber film assembly, followed
Ring water flow is distributed in formation cloth oxygen in mixed liquor under driving, so that reactor liquid phase dissolved oxygen is maintained at the oxygen supply of 2-5 ㎎/L biofilm, directly
To when detecting to form two aerobic layers on the biomembrane being attached on hollow fiber film assembly with microelectrode, i.e., double aerobic layers are raw
The success of object film biofilm；
3) except ammonia nitrogen operation is handled
After the success of double aerobic layer Biofilm Colonizations, high ammonia-nitrogen wastewater is passed through intake pump by the endoceliac mixed liquor of emptying receptacles
Be continuously injected into reactor cavity, the flow control of intake pump in 96.67-163.33ml/min, meanwhile, starting agitating device it is gentle
Circulatory system work, the control of agitating device revolution in 15-33r/min, the gas circulatory system keep step 2 flow and air pressure after
Continuous oxygen supply, when high ammonia-nitrogen wastewater liquid level rises to the continuous effluent mouth of container body, starts the water circulating pump of water circulation system, will
The flow velocity of water circulating pump is adjusted to 52-70ml/min, and the flow velocity of intake pump is adjusted to identical as water circulating pump flow velocity, makes height
Ammonia nitrogen waste water recycles form hydraulic retention in the reactor, and enters continuous operation tupe, and processed waste water is from continuous
Water outlet flows out, and ammonia nitrogen removal frank is up to 80-90% in waste water.
200~400mg/L of ammonium sulfate 1.35g~2.65g/L(ammonia nitrogen of the fluid nutrient medium), sodium acetate 3.55~
7.6 g/L (2000~4000 mg/L of COD), 30~45mg/L of Vickers salting liquid.
The full aerobic nitrogen removal microbial inoculum be anthropi or can low temperature remove high ammonia nitrogen heterotrophic nitrification-aerobic denitrification it is multiple
Combined bacteria agent.
Double aerobic layer biomembranes include the aerobic layer contacted with hollow fiber film assembly and contact with liquid phase aerobic
Layer.
By adopting the above scheme, the mixed liquor prepared includes fluid nutrient medium and full aerobic nitrogen removal microbial inoculum, wherein complete good
The dosage of oxygen denitrogenation microbial inoculum is the 3%-10% of reactor vessel body effective volume, remaining is fluid nutrient medium.It realizes complete aerobic
Denitrogenation biofilm handles high-nitrogen waste water.
In the biofilm stage, the revolution by controlling agitating device makes mixed liquor form vortex, and passes through control water cyclic system
The flow velocity of system allows full aerobic nitrogen removal bacterium to carry out biofilm under mixed liquor recurrent state, while passing through the stream of the control gas circulatory system
Amount and air pressure are directly to be oxygenated inside the membrane cavity of hollow-fibre membrane, and formed and flow back into liquid phase, protect reactor liquid phase dissolved oxygen
It holds in 2-5 ㎎/L, aerobic environment needed for full aerobic nitrogen removal bacterium biofilm can be widened, makes to form two inside and outside two on biomembrane
A aerobic layer.
Treatment process is being run except ammonia nitrogen, after the success of double aerobic layer Biofilm Colonizations, the endoceliac mixing of emptying receptacles
High ammonia-nitrogen wastewater is continuously injected into reactor cavity by liquid by intake pump, and the flow control of intake pump is in 96.67-163.33ml/
Min makes waste water form slow flow velocity, meanwhile, the gentle circulatory system work of starting agitating device, agitating device revolution control exists
15-33r/min, the gas circulatory system keep the flow of step 2 and air pressure to continue to supply oxygen, guarantee stable aerobic environment, when high ammonia
When nitrogen waste water liquid level rises to the continuous effluent mouth of container body, starting water circulation system work adjusts the flow velocity of water circulating pump
For 52-70ml/min, and the flow velocity of intake pump is adjusted to identical as water circulating pump flow velocity, allow high ammonia-nitrogen wastewater in the reactor
Circulation guarantees that waste water has certain hydraulic detention time in the reactor, high-nitrogen waste water can be made to recycle in the reactor and obtained
Acclimation, processed waste water are flowed out from continuous effluent mouth, and ammonia nitrogen removal frank is up to 80-90% in waste water.
200~400mg/L of ammonium sulfate 1.35g~2.65g/L(ammonia nitrogen of the fluid nutrient medium), sodium acetate 3.55~
7.6 g/L (2000~4000 mg/L of COD), 30~45mg/L of Vickers salting liquid.It can be mentioned for the growth of full aerobic nitrogen removal bacterium
For required nutriment.
Full aerobic nitrogen removal microbial inoculum of the present invention is anthropi, is 201810209286.2 rights referring to number of patent application
It is required that 1 and the 0010th section of specification；Can low temperature remove the heterotrophic nitrification-aerobic denitrification composite bacteria agent of high ammonia nitrogen and (call in the following text compound
Microbial inoculum) referring to number of patent application be 201810209983.8 claim 1-4 and 0007-0010 sections of specification.
Structure of reactor and wastewater treatment method of the present invention, change traditional biological film layer from inside to outside be respectively anoxic layer,
Anaerobic layer, the status of aerobic layer can provide lasting, stable DO for the inside and outside layer of biomembrane, form double aerobic layers, are conducive to
The high density of oxygen animalcule, high oxygen utilization rate enrichment, while realizing the efficient removal to high ammonia-nitrogen wastewater.
And the process flow that the technical solution of this patent also handles high-nitrogen waste water is simplified, and is particular enable to solve agriculture
Village's dispersion shape, the generations such as aquatic products cyclic culture shape be generally difficult to through pipe network into wastewater reuse approach high ammonia-nitrogen wastewater processing
Problem is dispersed the high nitrogens wastewater treatments such as shape, aquatic products cyclic culture shape for rural area and is provided conveniently.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of reactor of the present invention；
Fig. 2 is dioxygen layer biofilm structure.
Specific embodiment
Referring to Fig. 1, a kind of embodiment of the dioxygen layer biofilm reactor of wastewater treatment, the container body 1 including reactor,
1 lower part of container body is equipped with water inlet 2, which connects intake pump 3 by pipeline, and 1 top of container body, which is equipped with, continuously to be gone out
The mouth of a river 4.The bottom of chamber center of the container body 1 is equipped with agitating device 5, is provided as giving birth in the intracavitary agitating device 5 of avoiding of container body 1
The hollow fiber film assembly 6 of object membrane carrier, the hollow fiber film assembly 6 are one or more, each hollow fiber film assembly 6
Column structure or curtain structure are formed by several hydrophobic hollow fibers, the present embodiment uses the doughnut of two column structures
Membrane module 6.The uprightly setting of hollow fiber film assembly 6, the lower end of hollow fiber film assembly 6 connects air inlet pipe 7, each hollow fibre
The lower end of dimension membrane module 6 is fixed on the lower fixed seat 6-1 equipped with venthole, the venthole upstream end of the lower fixed seat 6-1
Propelling container body 1 is connected with the air inlet pipe 7 for being looped around 1 outside of container body, and the upstream end of the air inlet pipe 7 is sequentially connected air gauge
8, gas flowmeter 9, electric air pump 10, the upper end of hollow fiber film assembly 6 connect back to flow tube 11, each hollow fiber film assembly
6 upper end is fixed on the upper fixed seat 6-2 equipped with venthole, the venthole downstream propelling container of fixed seat 6-2
Body 1 is separately connected reflux tracheae 11, the downstream of two reflux tracheaes 11 and the microporous aeration device of the intracavitary lower part of container body 1 setting
12 connections, 1 top of container body are equipped with exhaust outlet 13, and the position of the exhaust outlet 13 is higher than continuous effluent mouth 4, gas is consequently formed and follows
Loop system, the air for being pumped into electric air pump 10 sequentially pass through gas flowmeter 9, air gauge 8, air inlet pipe 7, hollow-fibre membrane
It is discharged behind component 6, reflux tracheae 11, microporous aeration device 12,1 inner cavity of container body from exhaust outlet 13.The hollow-fibre membrane group
The upper end position of part 6 is lower than water loop exit 14, and lower end position is higher than microporous aeration device 12.1 top of container body is equipped with
Water loop exit 14, lower part are equipped with water and recycle import 15, and the position of the water loop exit 14 is lower than continuous effluent mouth 4, and water follows
It is connected between ring outlet 14 and water circulation import 15 by reflux water pipe 16, water circulating pump 17 is installed on the reflux water pipe 16,
Water circulation system is consequently formed, inlet valve 18, the inlet valve 18 and water inlet 2 are equipped between the water inlet 2 and intake pump 3
Between be equipped with bleeder 19, drain valve 20 is installed on the bleeder 19.The micropore of the microporous aeration device 12 is nanometer
Grade micropore, the position of microporous aeration device 12 is higher than water inlet 2 and water recycles import 15.The microporous aeration device 12 is diaphragm
Formula aerator or tube aerator or plate-type aerator.The aeration tube, aeration plate are made using micropore ceramics.This reality
The microporous aeration device 12 of example is applied using tube aerator, the both ends of the tube aerator connect with reflux tracheae 11 respectively, make
The air entered from two reflux tracheaes 11 is from the liquid phase that tube aerator enters 1 inner cavity of container body.
For this reactor in use, opening inlet valve 18, starting intake pump 3 enters liquid in container body 1 from water inlet 2
Chamber, starting agitating device 5 is stirred into the intracavitary liquid of container body 1 and generates vortex, when the liquid level of liquid flooded water loop exit
When 14, start water circulating pump 17, so that liquid from reflux water pipe 16 is back flowed back into container body 1 through water circulation import 15 intracavitary, formed
Liquid circulation.Start electric air pump 10 and be pumped into air, air enters doughnut through gas flowmeter 9, air gauge 8, air inlet pipe 7
Membrane module 6 is oxygenated, and partial air is penetrated from hollow-fibre membrane, remaining air is passed through from 6 upper end of hollow fiber film assembly
Reflux tracheae 11 backs into microporous aeration device 12, then enters in the intracavitary liquid of container body 1 from microporous aeration device 12, from
The additional air risen in liquid is discharged through exhaust outlet 13, and gas circulation is consequently formed.The liquid for needing emptying receptacles body 1 intracavitary
When, inlet valve 18 is closed, the drain valve 20 on bleeder 19, emptying rate of liquid that can be intracavitary by container body 1 are opened.
Using the method for dioxygen layer biofilm reactor of the present invention processing high ammonia-nitrogen wastewater, comprising the following steps:
1) mixed liquor is prepared
Mixed liquor is measured by the effective volume of reactor vessel body, and the mixed liquor includes fluid nutrient medium and full aerobic nitrogen removal bacterium
Agent, wherein the dosage of full aerobic nitrogen removal microbial inoculum is the 3%-10% of reactor vessel body effective volume, remaining is fluid nutrient medium.
The full aerobic nitrogen removal microbial inoculum be anthropi or can low temperature remove the heterotrophic nitrification-aerobic denitrification composite bacteria agent of high ammonia nitrogen.
2) the biofilm stage
The container body 1 that prepared mixed liquor is at the uniform velocity injected by intake pump 3 from water inlet 2 to reactor is intracavitary, starts simultaneously
Agitating device 5, the revolution control of agitating device 5 make mixed liquor form vortex, when mixed liquor liquid level rises in 15-33r/min
When the continuous effluent mouth 4 of container body 1, inlet valve 18 is closed, stops injection mixed liquor, starts the circulation of the reactor water circulatory system
Water pump 17 makes mixed liquor through water loop exit 14, reflux by the flow control of water circulating pump 17 in 23.67-45.38ml/min
It is intracavitary that water pipe 16, water circulating pump 17 from water circulation import 15 flow back to container body 1, allows full aerobic nitrogen removal bacterium in mixed liquor recurrent state
Lower carry out biofilm, while starting the electric air pump 10 of the gas circulatory system, air through electric air pump 10, flowmeter 9, air gauge 8 into
Enter hollow fiber film assembly 6, makes to supply oxygen inside the membrane cavity of hollow-fibre membrane in oxygenation state biofilm, air flow control exists
200-600 ㎎/L, pressure control are exposed through reflux tracheae 11 by micropore in 3-8KPa, additional air from hollow fiber film assembly 6
Device of air 12 enters the liquid phase of reactor, and formation cloth oxygen in mixed liquor is distributed under circulating water flow drive, makes reactor liquid phase
Dissolved oxygen is maintained at 2-5 ㎎/L for biofilm oxygen supply, until detecting the biomembrane being attached on hollow fiber film assembly with microelectrode
When two aerobic layers of upper formation, i.e., double aerobic layer Biofilm Colonization successes.Double aerobic layer biomembranes include and doughnut
The aerobic layer of membrane module contact and the aerobic layer (as shown in Figure 2) contacted with liquid phase.
3) except ammonia nitrogen operation is handled
After the success of double aerobic layer Biofilm Colonizations, high ammonia-nitrogen wastewater is passed through intake pump by the intracavitary mixed liquor of emptying receptacles body 1
3 are continuously injected into reactor cavity, the flow control of intake pump 3 in 96.67-163.33ml/min, meanwhile, start agitating device 5
Gentle circulatory system work, the control of 5 revolution of agitating device keep the flow of step 2 gentle in 15-33r/min, the gas circulatory system
Pressure continues to supply oxygen, and when high ammonia-nitrogen wastewater liquid level rises to the continuous effluent mouth 4 of container body, starts the recirculated water of water circulation system
Pump 17, is adjusted to 52-70ml/min for the flow velocity of water circulating pump 17, and the flow velocity of intake pump is adjusted to and water circulating pump flow velocity
It is identical, it recycles high ammonia-nitrogen wastewater in the reactor and forms hydraulic retention, and enter continuous operation tupe, it is processed useless
Water is flowed out from continuous effluent mouth 4, and ammonia nitrogen removal frank is up to 80-90% in waste water.
200~400mg/L of ammonium sulfate 1.35g~2.65g/L(ammonia nitrogen of the fluid nutrient medium), sodium acetate 3.55~
7.6 g/L (2000~4000 mg/L of COD), 30~45mg/L of Vickers salting liquid.
Using the experimental example of dioxygen layer biofilm reactor of the present invention processing high ammonia-nitrogen wastewater:
Case study on implementation 1, mixed liquor are measured by the effective volume of reactor vessel body, and the mixed liquor includes fluid nutrient medium and complete
Aerobic nitrogen removal microbial inoculum, wherein the dosage of full aerobic nitrogen removal microbial inoculum is the 3%-10% of reactor vessel body effective volume, remaining is
Fluid nutrient medium；
Using the experiment of dioxygen layer biofilm reactor removal various concentration ammonia nitrogen: being measured by the effective volume of reactor vessel body
Mixed liquor is prepared, mixed liquor includes fluid nutrient medium and full aerobic nitrogen removal microbial inoculum, wherein fluid nutrient medium 7.5L, fluid nutrient medium
Carbon-nitrogen ratio be 10, ammonia nitrogen concentration 400mg/L, full aerobic nitrogen removal microbial inoculum dosage is reactor vessel body effective volume
3%-10% is stirred evenly.Full aerobic nitrogen removal microbial inoculum uses heterotrophic nitrification-aerobic denitrification composite bacteria agent.It will be mixed by intake pump
There is the mixed liquid of heterotrophic nitrification-aerobic denitrification composite bacteria agent at the uniform velocity to inject in reactor, and keeps reactor liquid phase molten
Oxygen is between 2-5mg/L, and for circulation after biofilm 15-30 days, one layer of flaxen biomembrane, ammonia nitrogen degradation rate are adhered in membrane module surface
It is maintained at 90% or more, then improving ammonia nitrogen influent concentration is that 600 mg/L successively improve ammonia nitrogen after ammonia nitrogen degradation rate is stablized
Concentration is to 1500 mg/L, and by 2 months, ammonia nitrogen degradation rate was held in 85% or more, and without nitrite nitrogen and nitrate nitrogen
Accumulation.Aerobic zone is detected by microelectrode, is found in entire biomembrane, two aerobic layer regions occurs, dissolved oxygen in water is kept
In 2-5mg/L.
Case study on implementation 2, dioxygen layer biofilm reactor remove true pig farm breeding wastewater experiment: by reactor vessel body
Mixed liquor is prepared in effective volume metering, and mixed liquor includes fluid nutrient medium and full aerobic nitrogen removal microbial inoculum, wherein fluid nutrient medium
7.5L, the carbon-nitrogen ratio of fluid nutrient medium are 10, ammonia nitrogen concentration 400mg/L, and full aerobic nitrogen removal microbial inoculum dosage is reactor appearance
The 3%-10% of body effective volume, stirs evenly.Full aerobic nitrogen removal microbial inoculum uses anthropi.It will be mixed with by intake pump pale
The mixed liquor of bacillus at the uniform velocity injects in reactor, and keeps reactor liquid phase dissolved oxygen between 2-5mg/L, recycles biofilm 15-30
After it, one layer of flaxen biomembrane is adhered on membrane module surface, and ammonia nitrogen degradation rate is maintained at 90% or more, and is examined by microelectrode
Survey that biological membranous layer is aerobic, anaerobic zone distribution situation, there are two aerobic regions in discovery, mark dioxygen layer Biofilm Colonization at
Function.Then, with continuous stream mode, uniformly continuous is infused under being for 52-70ml/min state in intake pump and water circulating pump flow velocity
Ru Zhu factory breeding wastewater stoste, wherein ammonia nitrogen concentration was between 400mg/L-2000mg/L in pig factory breeding wastewater, by 30 days
Domestication after, ammonia nitrogen removal frank is held in 80% or more, and nitrogen removal rate is up to 75%.
Claims (10)
1. a kind of dioxygen layer biofilm reactor of wastewater treatment, the container body including reactor, the container body lower part are equipped with
Water inlet, the water inlet connect intake pump by pipeline, and container body top is equipped with continuous effluent mouth, it is characterised in that: the appearance
The bottom of chamber center of body is equipped with agitating device, in the intracavitary hollow fibre avoided agitating device and be provided as biofilm carrier of container body
Membrane module is tieed up, the hollow fiber film assembly is uprightly arranged, and the lower end of hollow fiber film assembly connects air inlet pipe, the air inlet pipe
Upstream end be sequentially connected air gauge, gas flowmeter, electric air pump, the upper end of hollow fiber film assembly connects back to flow tube,
The downstream of the reflux tracheae is connect with the microporous aeration device of the intracavitary lower part setting of container body, and container body top is equipped with exhaust
Mouthful, the position of the exhaust outlet is higher than continuous effluent mouth, and the gas circulatory system is consequently formed；The container body top is recycled equipped with water
Outlet, lower part are equipped with water and recycle import, and the position of the water loop exit is lower than continuous effluent mouth, and water loop exit and water recycle
By reflux water pipe connection between import, water circulating pump is installed on the reflux water pipe, is consequently formed water circulation system, it is described into
It is equipped with inlet valve between the mouth of a river and intake pump, bleeder is equipped between the inlet valve and water inlet, is pacified on the bleeder
Fill drain valve.
2. the dioxygen layer biofilm reactor of wastewater treatment according to claim 1, it is characterised in that: the doughnut
Membrane module is one or more, and each hollow fiber film assembly forms column structure or curtain knot by several hydrophobic hollow fibers
Structure.
3. the dioxygen layer biofilm reactor of wastewater treatment according to claim 1, it is characterised in that: the doughnut
The upper end position of membrane module is lower than water loop exit, and lower end position is higher than microporous aeration device.
4. the dioxygen layer biofilm reactor of wastewater treatment according to claim 1, it is characterised in that: the micro-pore aeration
The micropore of device be it is nanometer level microporous, the position of microporous aeration device is higher than water inlet and water recycles import.
5. the dioxygen layer biofilm reactor of wastewater treatment according to claim 1, it is characterised in that: the micro-pore aeration
Device is diaphragm type aerator or tube aerator or plate-type aerator.
6. the dioxygen layer biofilm reactor of wastewater treatment according to claim 5, it is characterised in that: the aeration tube,
Aeration plate is made using micropore ceramics.
7. a kind of wastewater treatment method using dioxygen layer biofilm reactor described in claim 1, it is characterised in that including with
Lower step:
1) mixed liquor is prepared
Mixed liquor is measured by the effective volume of reactor vessel body, and the mixed liquor includes fluid nutrient medium and full aerobic nitrogen removal bacterium
Agent, wherein the dosage of full aerobic nitrogen removal microbial inoculum is the 3%-10% of reactor vessel body effective volume, remaining is fluid nutrient medium；
2) the biofilm stage
The container body that prepared mixed liquor is at the uniform velocity injected by intake pump from water inlet to reactor is intracavitary, while starting stirring
Device, the revolution control of agitating device make mixed liquor form vortex, when mixed liquor liquid level rises to container body in 15-33r/min
Continuous effluent mouth when, close inlet valve, stop injection mixed liquor, start the reactor water circulatory system water circulating pump, will follow
The flow control of ring water pump in 23.67-45.38ml/min, make mixed liquor through water loop exit, reflux water pipe, water circulating pump from
It is intracavitary that container body is flowed back in water circulation import, allows full aerobic nitrogen removal bacterium to carry out biofilm under mixed liquor recurrent state, while starting gas
The electric air pump of the circulatory system, air enter hollow fiber film assembly through electric air pump, flowmeter, air gauge, make doughnut
It is biofilm oxygen supply that oxygenation state is in inside the membrane cavity of film, and air flow control is in 200-600 ㎎/L, and pressure control is in 3-
8KPa, additional air are entered the liquid phase of reactor by microporous aeration device through reflux tracheae from hollow fiber film assembly, followed
Ring water flow is distributed in formation cloth oxygen in mixed liquor under driving, so that reactor liquid phase dissolved oxygen is maintained at the oxygen supply of 2-5 ㎎/L biofilm, directly
To when detecting to form two aerobic layers on the biomembrane being attached on hollow fiber film assembly with microelectrode, i.e., double aerobic layers are raw
The success of object film biofilm；
3) except ammonia nitrogen operation is handled
After the success of double aerobic layer Biofilm Colonizations, high ammonia-nitrogen wastewater is passed through intake pump by the endoceliac mixed liquor of emptying receptacles
Be continuously injected into reactor cavity, the flow control of intake pump in 96.67-163.33ml/min, meanwhile, starting agitating device it is gentle
Circulatory system work, the control of agitating device revolution in 15-33r/min, the gas circulatory system keep step 2 flow and air pressure after
Continuous oxygen supply, when high ammonia-nitrogen wastewater liquid level rises to the continuous effluent mouth of container body, starts the water circulating pump of water circulation system, will
The flow velocity of water circulating pump is adjusted to 52-70ml/min, and the flow velocity of intake pump is adjusted to identical as water circulating pump flow velocity, makes height
Ammonia nitrogen waste water recycles form hydraulic retention in the reactor, and enters continuous operation tupe, and processed waste water is from continuous
Water outlet flows out, and ammonia nitrogen removal frank is up to 80-90% in waste water.
8. the wastewater treatment method of dioxygen layer biofilm reactor according to claim 7, it is characterised in that: the liquid training
Support 200~400mg/L of ammonium sulfate 1.35g~2.65g/L(ammonia nitrogen of base), 3.55~7.6 g/L of sodium acetate (COD 2000~
4000 mg/L), 30~45mg/L of Vickers salting liquid.
9. the wastewater treatment method of dioxygen layer biofilm reactor according to claim 7, it is characterised in that: described complete aerobic
Denitrogenation microbial inoculum be anthropi or can low temperature remove the heterotrophic nitrification-aerobic denitrification composite bacteria agent of high ammonia nitrogen.
10. the wastewater treatment method of dioxygen layer biofilm reactor according to claim 7, it is characterised in that: described double good
Oxygen layer biomembrane includes the aerobic layer contacted with hollow fiber film assembly and the aerobic layer that contacts with liquid phase.
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