CN106892502A - A kind of processing method of cellulosic ethanol waste water - Google Patents
A kind of processing method of cellulosic ethanol waste water Download PDFInfo
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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
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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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
- C02F2209/14—NH3-N
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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
- C02F2209/15—N03-N
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- 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
- C02F2209/19—SO4-S
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- 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
- C02F2301/10—Temperature conditions for biological treatment
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Abstract
The present invention relates to water treatment field, disclose a kind of processing method of cellulosic ethanol waste water, the method includes, acclimation is carried out to the sludge containing ammonia oxidation bacteria and NOB, then using the sludge after acclimation to carrying out short distance nitration treatment and denitrification treatment successively by the cellulosic ethanol waste water after Anaerobic Treatment.Using method of the invention it is achieved that the successful denitrogenation of cellulosic ethanol waste water, reduces the nitrogen content in waste water, while the content of sulfate radical in waste water meets discharge standard.
Description
Technical field
The present invention relates to water treatment field, in particular it relates to a kind of processing method of cellulosic ethanol waste water.
Background technology
In the last few years, countries in the world input substantial contribution, to producing fuel second by raw material of lignocellulosic
The biochemical process of alcohol is studied, and achieves remarkable result in each process procedure, is greatly pushed away
The commercialized process of cellulosic ethanol is entered.With progressively implementing for every policy, China is with wood fibre
Element is also accelerating for the construction of the device of raw material production alcohol fuel.In conventional and ongoing research
In, a large amount of notices all concentrate on reduction cellulase cost and improve the material consumption institutes such as the strain of ethanol yield
On caused Cost Problems, this kind of engineering for being just able to fully manifest in large-scale production of discharge of wastewater is asked
Topic then pays close attention to less.Key technology breaks through while, the treatment of its waste water for producing and resource
Problem also can be protruded increasingly.It is smoothed out to ensure that cellulosic ethanol is commercialized, it is necessary to resolve
Cellulose second (is referred to as with the waste water that lignocellulosic is produced as raw material production alcohol fuel process below
Alcohol waste water) process problem.
Cellulose pretreatment destroys the natural structure of lignocellulosic, wherein existing with xylose and glucose
Glucide can be utilized in ethanol production process, during simultaneously can be accompanied by many side reactions
Occur, generate the side reaction products such as some classes containing furan nucleus, furfural, formic acid and levulic acid.
These accessory substances can suppress the activity of cellulase and fermentative microorganism, so as to influence lignocellulosic
Conversion, it is final to reduce the quantity for producing ethanol.And these materials major part can all be present in waste water, and
And generally it is required for the long time to carry out biodegradation, so may result in the biodegradability drop of waste water
It is low, after carrying out biochemical treatment to such waste water, it is still desirable to increase advanced treatment process.
During cellulosic ethanol production, the explosion of ammonia fiber or dilute acid pretreatment method be typically can by with
In the pretreatment stage of raw material, general conventional engineering pretreatment selection scheme is to carry out adding for sulfuric acid.
In the waste water that different material production ethanol is produced, the content of sulfate radical is differed.For example, with cassava
It is very big with the content difference that corn is the sulfate radical in the alcohol wastewater that raw material is produced, sulfuric acid in the former waste water
The content of root is approximately 10~12 times of the latter.Additionally, the different of pretreating process can produce in influence process
Sulfate radical in waste water content.The sulphur of the waste water produced in the ethanol production process with cellulose as raw material
Acid group concentration is all higher, and typically all in more than 3000mg/L, what is had even can be up to milligrams per liters up to ten thousand.
When carrying out biological treatment to waste water, under anaerobic, sulfate radical easily reduces sulphidisation.
In water phase, hydrogen sulfide exists with HS-, and HS- belongs to toxicant for microorganism, can
To suppress the growth of anaerobic methanogens, severe patient is also resulted in directly is poisoned to death so that organic matter
Removal efficiency is remarkably decreased, and further aggravates follow-up aerobic and advanced treating burden.Additionally, detesting
The H produced during oxygen2S gases can be along with biogas spilling system, and H in biogas2The content of S can be with
Increasing and increasing for sulfate radical in waste water content.H2S is a kind of sour gas, and has rotten-egg odour,
Harmful to human respiratory, it is present can produce corrosion to make biogas conveyance conduit and process equipment
With while in order to ensure that it does not leak, typically requiring that equipment will have good sealing.
General pretreatment to raw material is all to use dilute acid pretreatment or ammonia fiber blasting procedure, and this method
The content of nitrogen in waste water can be increased, the content of ammonia nitrogen is than with shallow lake in the waste water produced as raw material with cellulose
Silty is high more than 100 times in raw material generation waste water, and is existed in the form of inorganic ammonium salt more.
Cellulosic ethanol belongs to emerging field in itself, and cellulosic ethanol waste water field is even more blank
Field, referential data is very few, and it is very big that cellulosic ethanol waste water deals with difficulty.And cellulose second
The difficult point and emphasis of effective removing of alcohol sulfate radical in waste water and ammonia nitrogen, even more cellulosic ethanol waste water.
Short distance nitration is that for traditional complete nitrification, whole biological denitrificaion is experience
NH4+-N→NO2--N→NO3--N→NO2--N→N2Conversion process, and short distance nitration is by changing
Environmental condition controls the activity of ammonia oxidation bacteria (AOB) and NOB (NOB), realizes
NH4+-N→NO2--N→N2The denitrification process of conversion, the key problem in technology is the growth for promoting AOB
And suppress the growth of NOB, so as to realize the accumulation of nitrite nitrogen.Compared to traditional nitration denitrification
Biological denitrificaion, short-cut nitrification and denitrification biological denitrificaion has that energy resource consumption is low, carbon source consumption less, denitrogenation imitates
Many advantages, such as rate is high.
Current short-cut nitrification and denitrification technique has been applied to the treatment of various organic wastewaters, such as, and oil refining
The high concentrated organic wastewaters such as catalysis waste water, percolate, Pig raising wastewater, leather water.But will be short
Journey nitration denitrification technique is applied and also belongs to rare in the field of cellulosic ethanol waste water.This is due to various useless
The water quality and indices of water have very big difference, in application short-cut nitrification and denitrification technique neither one compared with
It is general method of wastewater treatment.
Therefore, develop one kind carries out effective cellulosic ethanol waste water using short-cut nitrification and denitrification technique
Treatment method with remove ammonia nitrogen therein and control sulfate radical content, with very important reality
Meaning.
The content of the invention
It is an object of the invention to provide a kind of processing method of cellulosic ethanol waste water, by using the present invention
Method, can effectively remove the ammonia nitrogen in cellulosic ethanol waste water and the content of sulfate radical can be controlled.
Specifically, the invention provides a kind of processing method of cellulosic ethanol waste water, the method includes,
Acclimation is carried out to the sludge containing ammonia oxidation bacteria and NOB, acclimation is then used
Sludge afterwards is processed and anti-carrying out short distance nitration successively by the cellulosic ethanol waste water after Anaerobic Treatment
Nitrification processing；
Wherein, the condition of the short distance nitration treatment includes：Aeration time can be 2-4 hours, dissolving
Oxygen content can be 0.8-1.5mg/L, and pH value can be 7.5-8, and temperature can be 30 DEG C -35 DEG C, with
CaCO3The basicity of meter can be 8000-9500mg/L；The condition of the denitrification treatment includes：Stop
Aeration, the time can be 0.5-1.5 hours, and temperature can be 30 DEG C -35 DEG C；At short-cut nitrification and denitrification
The hydraulic detention time of reason can be 10-30 hours.
The invention provides a kind of processing method of cellulosic ethanol waste water, it will be processed by anaerobic system
Cellulosic ethanol waste water afterwards carries out biological denitrificaion using the technique of short distance nitration.The present invention is using traditional
Nitrifying sludge starts sbr reactor device, by taming the requirement for making it meet short-cut nitrification technology, passes through
Different condition during control short distance nitration, realizes the successful denitrogenation of cellulosic ethanol waste water, both drops
Nitrogen content in low waste water, while controlling the content of sulfate radical in waste water to meet discharge standard.The present invention
The method of offer has the advantages that energy resource consumption is low, carbon source consumption is high with nitric efficiency less.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description of the drawings
Accompanying drawing is, for providing a further understanding of the present invention, and to constitute the part of specification, with
Following specific embodiment is used to explain the present invention together, but is not construed as limiting the invention.
In accompanying drawing：
Fig. 1 is the result schematic diagram of acclimation in embodiment 1.
Specific embodiment
Specific embodiment of the invention is described in detail below.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to limit the invention.
The invention provides a kind of processing method of cellulosic ethanol waste water, the method includes, to containing ammonia
The sludge of oxidation bacteria and NOB carries out acclimation, then uses the sludge after acclimation
To carrying out short distance nitration treatment and denitrification treatment successively by the cellulosic ethanol waste water after Anaerobic Treatment；
Wherein, the condition of the short distance nitration treatment includes：Aeration time can be 2-4 hours, dissolving
Oxygen content can be 0.8-1.5mg/L, and pH value can be 7.5-8, and temperature can be 30 DEG C -35 DEG C, with
CaCO3The basicity of meter can be 8000-9500mg/L；The condition of the denitrification treatment includes：Stop
Aeration, the time can be 0.5-1.5 hours, and temperature can be 30 DEG C -35 DEG C；At short-cut nitrification and denitrification
The hydraulic detention time of reason can be 10-30 hours.
Preferably, the condition of the short distance nitration treatment includes：Aeration time is 2.5-3.5 hours；It is molten
Solution oxygen content is 0.8-1mg/L；PH value is 7.7-8, and temperature is 30 DEG C -35 DEG C；With CaCO3The alkali of meter
It is 8500-9500mg/L to spend；The condition of the denitrification treatment includes：Time is 1-1.5 hours, temperature
Spend is 30 DEG C -35 DEG C；The hydraulic detention time of short-cut nitrification and denitrification treatment is 15-30 hours.
In the present invention, the cellulosic ethanol waste water refers to producing the waste water that cellulosic ethanol is produced,
The implication of the cellulosic ethanol is known to the skilled person, as a rule, cellulosic ethanol be with
Cellulose biomass is the ethanol of raw material production, and the cellulose biomass can include cellulose, half fibre
Dimension element and lignin.
In the present invention, the reactor for carrying out short-cut nitrification and denitrification treatment can be the conventional choosing of this area
Select, it is, for example possible to use SBR (sequencing batch active sludge) reactor carries out short-cut nitrification and denitrification
Treatment.
In the present invention, the source of the sludge containing ammonia oxidation bacteria and NOB can be
The conventional selection of this area, for example can be by commercially available, or treatment corn alcohol waste water
Traditional nitrifying sludge.
In the present invention, the index of the sludge containing ammonia oxidation bacteria and NOB can be
The conventional selection of this area, for example, the sludge containing ammonia oxidation bacteria and NOB is molten
Solution oxygen content can be 1.5-3mg/L, and pH value can be 7-8.
In the present invention, the purpose of the acclimation is to promote the life of ammonia oxidation bacteria (AOB) in sludge
It is long, suppress the activity of NOB (NOB).
In the present invention, acclimation is carried out to the sludge containing ammonia oxidation bacteria and NOB
Condition includes：Aeration time can be 3-4 hours, and dissolved oxygen content can be 1-1.5mg/L, precipitation
Time can be 0.5-1 hours, and hydraulic detention time can be 10-20 hours.
In the present invention, the nitrite accumulation rate in the waste water that acclimation is obtained is more than 90%
When, you can judge that the acclimation is completed.When with said one hydraulic detention time as a cycle,
In order that the acclimation is completed, it is necessary to carry out the treatment in multiple cycles, until what acclimation was obtained
Nitrite accumulation rate in waste water is more than 90%.Preferably, the acclimation is in 50 cycles
Within complete, within more preferably 30 cycles complete, within more preferably 25 cycles complete.
For the lower limit in cycle, there is no particular limitation, as long as so that nitrous acid in the waste water that obtains of acclimation
Salt accumulation rate is more than 90%, for example, can be 5 more than the cycle, preferably 10 cycles with
On, more preferably 20 are more than the cycle.
In the present invention, the flow condition of the acclimation includes：Cellulosic ethanol waste water can be used
With the mixture of water as water inlet, wherein, the water can be running water.Can be using intermittent water inflow
Mode, inflow temperature can be 30-35 DEG C, and pH value can be 7.8-8.5, with CaCO3The basicity of meter
Can be 8000-9500mg/L, ammonia nitrogen concentration can be 80-120mg/L, and sulfate ion concentration can be with
It is 50-100mg/L.
According to one kind preferred embodiment, the inflow temperature of the acclimation is 32-35 DEG C, pH value
It is 7.8-8.5, with CaCO3The basicity of meter is 8500-9500mg/L, and ammonia nitrogen concentration is 90-120mg/L,
Sulfate ion concentration is 60-100mg/L.
In the present invention, aerated reaction refers to terminating into the water phase or sbr reactor device is full of after water, enters
Row is aerated to reach the purpose for the treatment of.Preferably, it is stirred while being aerated.The aeration
Can be completed by aerator, the aerator and stirring condition can be that the conventional of this area selects
Select.For example, the aerator can be aeration plate.Agitating device can be arranged on sbr reactor device
Top.The rotating speed of agitating device can be 20-50rpm.
In the present invention, the hydraulic detention time (HRT) refers to pending waste water in reactor
Mean residence time.The cumulative percentage of nitrite refers to nitrite nitrogen in the waste water after acclimation
(NO2- N) content and nitrite nitrogen and nitrate nitrogen (NO3- N) content sum ratio, ammonia nitrogen goes
The difference and the ratio of influent ammonium concentration of influent ammonia nitrogen and water outlet ammonia nitrogen concentration, nitrite are referred to except rate
Clearance refer to the initial nitrite nitrogen of denitrification and denitrification terminate the difference of nitrite nitrogen content with it is anti-
Nitrify initial nitrite nitrogen content ratio.
In the present invention, when the nitrite accumulation rate in the waste water that acclimation is obtained is more than 90%,
The acclimation is completed, it is believed that domestication system (for example, sbr reactor device) has been realized in
By the transformation of traditional complete nitrification to short distance nitration, you can to use the sludge after acclimation to passing through
Cellulosic ethanol waste water after Anaerobic Treatment carries out short distance nitration treatment.
In the present invention, the dissolved oxygen content of the cellulosic ethanol waste water by after Anaerobic Treatment can be with
It is 0.8-1.5mg/L, pH value can be 7.8-8.5, with CaCO3The basicity of meter can be
8000-9500mg/L, ammonia nitrogen concentration can be 200-300mg/L, and sulfate ion concentration can be
50-100mg/L。
Mode is preferably carried out according to one kind, the cellulosic ethanol waste water by after Anaerobic Treatment it is molten
Solution oxygen content is 0.8-1.2mg/L, and pH value is 7.8-8.5, with CaCO3The basicity of meter is
8500-9500mg/L, ammonia nitrogen concentration is 220-300mg/L, and sulfate ion concentration is 60-100mg/L.
In the present invention, the Anaerobic Treatment can be the conventional selection of this area, for example, the anaerobism
The condition for the treatment of includes：Temperature can be 30 DEG C -38 DEG C, and pH value can be 7.8-8.5, during hydraulic retention
Between can be 2.5-3.5 days.Needed compared to the chemistry before Anaerobic Treatment by the waste water after Anaerobic Treatment
Oxygen amount reduction by more than 80%.
In the present invention, all of water inlet can be disposably pumped into reactor by intake pump, flooding time
Can be ignored.
In the present invention, the hydraulic detention time of short-cut nitrification and denitrification is included at least one short distance nitration
Reason time and at least one denitrification process time.The hydraulic detention time of the short-cut nitrification and denitrification with
The time of short distance nitration treatment and the time of denitrification treatment determine short-cut nitrification and denitrification treatment jointly
The number for carrying out.For example, hydraulic detention time is 20 hours, the aeration time of short distance nitration treatment is 3
Hour, denitrification process time is 1 hour, then it is considered that having carried out 5 short distance nitration treatment and 5
Secondary denitrification treatment, short distance nitration treatment and denitrification treatment are repeated in carrying out.
In the present invention, the hydraulic detention time of acclimation includes at least one aeration time and at least one
The individual sedimentation time.The hydraulic detention time of the acclimation is jointly true with aeration time and sedimentation time
The number that fixed aeration and precipitation are carried out.For example, the hydraulic detention time of acclimation is 18 hours, expose
The gas time is 4 hours, and the sedimentation time is 0.5 hour, then it is considered that having carried out 4 aerations and 4 times
Precipitation, aeration and precipitation are repeated in carrying out.
In the present invention, the species of the ammonia oxidation bacteria (AOB) can be the conventional selection of this area,
Can be for example Mtrosomonas hair bacillus (Nitrosomonas europaea), this is people in the art
Well known to member, or else do not repeat herein.
In the present invention, denitrification treatment is the process of anoxic treatment, and the condition of the denitrification treatment is also
Including：Bacterium bag includes denitrifying bacteria, and the denitrifying bacteria can be various denitrifications commonly used in the art
Bacterium, such as denitrogenation micrococcus and/or denitrifying pseudomonas, this is known to those skilled in the art,
This is repeated no more.
In the present invention, the processing method of the cellulosic ethanol waste water is additionally may included in the denitrification
Additional carbon is added in treatment, to improve ammonia nitrogen removal frank.The additional carbon can be the normal of this area
Rule selection, for example, at least one that can be selected from methyl alcohol, glucose and sodium acetate, preferably grape
Sugar and/or sodium acetate.The consumption of the additional carbon can be according to the Asia in the waste water for carrying out denitrification treatment
The amount of nitrate determines.For example, the addition of the additional carbon and the waste water for carrying out denitrification treatment
In the weight ratio of nitrite can be 1-2:1.Preferably, when additional carbon is glucose, Portugal
The addition of grape sugar is 1.5-2 with the weight ratio of waste water nitrite:1；When additional carbon is sodium acetate
When, the addition of sodium acetate is 1-1.2 with the weight ratio of waste water nitrite:1.Nitrite herein
Weight in terms of the weight of nitrite anions.
Below will the present invention will be described in detail by embodiment.In following examples,
1) sludge containing ammonia oxidation bacteria and NOB is China Oil and Food Import and Export Corporation's biochemistry energy (Zhaodong)
Co., Ltd processes the aerobic sludge of corn alcohol waste water；
2) sbr reactor device, long 2.5 meters, wide 0.9 meter, high 1.5 meters, totally two groups, dischargeable capacity 1.0m3,
Bottom is provided with 6 aeration plates, and the service area of each aeration plate is 0.15 meter, and bottom is provided with agitating device；
3) dissolved oxygen content is measured using portable dissolved oxygen instrument (BELL, BDO-820)；
4) assay method of ammonia nitrogen concentration：Nessler's reagent photometer；
5) assay method of sulfate ion concentration：Barium sulfategravimetry；
6) nitrite nitrogen (NO2- N) content assay method：Diazo coupling AAS；
7) nitrate nitrogen (NO3- N) content assaying method：Ultraviolet spectrophotometry.
Embodiment 1
The present embodiment is used for the processing method of the cellulosic ethanol waste water for illustrating present invention offer.
(1) acclimation
Mixed with running water using cellulosic ethanol waste water and intake as reactor, the pH value of water inlet is
7.5, temperature is 30 DEG C, with CaCO3The basicity of meter is 9000mg/L, and ammonia nitrogen concentration is 100mg/L,
Sulfate ion concentration is 80mg/L.Seed sludge is the traditional nitrifying sludge for processing corn alcohol waste water,
Dissolved oxygen content in the nitrifying sludge is 2.5mg/L, and pH value is 7.In acclimation stage, SBR
The method of operation of reactor is intermittent water inflow, aeration, is aerated 4 hours, and dissolved oxygen content is 1.5mg/L,
Precipitation 1 hour, HRT is 10 hours, and discharge rate is 60%.As shown in figure 1, being stopped with a waterpower
The time is stayed for a cycle, in 25 cycles of acclimation operation, in addition to the 3rd cycle, remaining
The ammonia nitrogen removal frank in cycle is more than 80%.Within preceding 20 cycles of acclimation, water outlet nitrous
State nitrogen content is always below 5mg/L.Within the 22nd cycle and later cycle, nitrite adds up
Rate reaches more than 98%, and ammonia nitrogen removal frank stabilization illustrates that acclimation is completed, short distance nitre 80% or so
Change denitrification process to realize.
Wherein, in Fig. 1, water outlet nitrite and water outlet nitrate concentration divide in terms of nitrogen
It is not water outlet nitrite nitrogen concentration and effluent nitrate-nitrogen concentration.
(2) Anaerobic Treatment
Cellulosic ethanol waste water is carried out into Anaerobic Treatment, the temperature of Anaerobic Treatment is 35 DEG C, and pH value is 8,
Hydraulic detention time is 3 days.Waste water after the Anaerobic Treatment for obtaining is compared to the chemistry before Anaerobic Treatment
Oxygen demand reduces 83%, and the dissolved oxygen content of the waste water that Anaerobic Treatment is obtained is 1mg/L, and pH value is
8.2, with CaCO3The basicity of meter is 9000mg/L, and ammonia nitrogen concentration is 240mg/L, and sulfate ion is dense
It is 60mg/L to spend.
(3) short-cut nitrification and denitrification treatment
In sbr reactor device, using the sludge after the domestication that step (1) is obtained in step (2)
Short-cut nitrification and denitrification treatment is carried out by the cellulosic ethanol waste water after Anaerobic Treatment.Short distance is carried out first
Nitrification processing, aeration time is 3 hours, and pH value is 8, and temperature is 30 DEG C.Useless oxygen in water contains
It is 1mg/L to measure, with CaCO3The basicity of meter is 9000mg/L.By after the treatment of first time short distance nitration
NO2- N content is 180mg/L.Stop aeration, add glucose 890g, carry out denitrification treatment,
Time is 1 hour, and temperature is 30 DEG C.Hydraulic detention time is 20 hours.
The results are shown in Table 1 for short-cut nitrification and denitrification treatment.
Embodiment 2
The present embodiment is used for the processing method of the cellulosic ethanol waste water for illustrating present invention offer.
(1) acclimation
Mixed with running water using cellulosic ethanol waste water and intake as reactor, the pH value of water inlet is
7.8, temperature is 35 DEG C, with CaCO3The basicity of meter is 8500mg/L, and ammonia nitrogen concentration is 120mg/L,
Sulfate ion concentration is 60mg/L.Seed sludge is the traditional nitrifying sludge for processing corn alcohol waste water,
Dissolved oxygen content in the nitrifying sludge is 1.5mg/L, and pH value is 8.In acclimation stage, SBR
The method of operation of reactor is intermittent water inflow, aeration, is aerated 3 hours, and dissolved oxygen content is 1.3mg/L,
Precipitation 0.75 hour, HRT is 19 hours, and discharge rate is 60%.It is one with a hydraulic detention time
In the individual cycle, in the 25th cycle and later cycle of acclimation operation, the accumulative rate of nitrite reaches
To more than 90%, ammonia nitrogen removal frank stabilization illustrates that acclimation is completed 80% or so, and short distance nitration is anti-
Nitration processes are realized.
(2) Anaerobic Treatment
Cellulosic ethanol waste water is carried out into Anaerobic Treatment, the temperature of Anaerobic Treatment is 38 DEG C, and pH value is 7.8,
Hydraulic detention time is 2.5 days.Waste water after the Anaerobic Treatment for obtaining is compared to the change before Anaerobic Treatment
Learn oxygen demand and reduce 90%, the dissolved oxygen content of the waste water that Anaerobic Treatment is obtained is 1.2mg/L, pH value
It is 8, with CaCO3The basicity of meter is 8500mg/L, and ammonia nitrogen concentration is 220mg/L, sulfate ion
Concentration is 100mg/L.
(3) short-cut nitrification and denitrification treatment
In sbr reactor device, using the sludge after the domestication that step (1) is obtained in step (2)
Short-cut nitrification and denitrification treatment is carried out by the cellulosic ethanol waste water after Anaerobic Treatment.Short distance is carried out first
Nitrification processing, aeration time is 3.5 hours, and pH value is 7.5, and temperature is 35 DEG C.Useless oxygen in water
Content is 1.5mg/L, with CaCO3The basicity of meter is 8500mg/L.At first time short distance nitration
NO after reason2- N content is 172mg/L.Stop aeration, add sodium acetate 580g, carry out denitrification
Treatment, the time is 1.5 hours, and temperature is 32 DEG C.Hydraulic detention time is 30 hours.
The results are shown in Table 1 for short-cut nitrification and denitrification treatment.
Embodiment 3
The present embodiment is used for the processing method of the cellulosic ethanol waste water for illustrating present invention offer.
(1) acclimation
Mixed with running water using cellulosic ethanol waste water and intake as reactor, the pH value of water inlet is
8.5, temperature is 32 DEG C, with CaCO3The basicity of meter is 9500mg/L, and ammonia nitrogen concentration is 90mg/L,
Sulfate ion concentration is 100mg/L.Seed sludge is the traditional nitrifying sludge for processing corn alcohol waste water,
Dissolved oxygen content in the nitrifying sludge is 3mg/L, and pH value is 7.5.In acclimation stage, SBR
The method of operation of reactor is intermittent water inflow, aeration, is aerated 3.5 hours, and dissolved oxygen content is 1mg/L,
Precipitation 0.5 hour, HRT is 16 hours, and discharge rate is 60%.It is one with a hydraulic detention time
In the individual cycle, in the 20th cycle and later cycle of acclimation operation, the accumulative rate of nitrite reaches
To more than 95%, ammonia nitrogen removal frank stabilization illustrates that acclimation is completed 80% or so, and short distance nitration is anti-
Nitration processes are realized.
(2) Anaerobic Treatment
Cellulosic ethanol waste water is carried out into Anaerobic Treatment, the temperature of Anaerobic Treatment is 30 DEG C, and pH value is 8.5,
Hydraulic detention time is 3.5 days.Waste water after the Anaerobic Treatment for obtaining is compared to the change before Anaerobic Treatment
Learn oxygen demand and reduce 80%, the dissolved oxygen content of the waste water that Anaerobic Treatment is obtained is 0.8mg/L, pH value
It is 8.5, with CaCO3The basicity of meter is 9500mg/L, and ammonia nitrogen concentration is 300mg/L, sulfate ion
Concentration is 80mg/L.
(3) short-cut nitrification and denitrification treatment
In sbr reactor device, using the sludge after the domestication that step (1) is obtained in step (2)
Short-cut nitrification and denitrification treatment is carried out by the cellulosic ethanol waste water after Anaerobic Treatment.Short distance is carried out first
Nitrification processing, aeration time is 2.5 hours, and pH value is 7.8, and temperature is 32 DEG C.Useless oxygen in water
Content is 0.8mg/L, with CaCO3The basicity of meter is 9500mg/L.By after short distance nitration treatment
NO2- N content is 226mg/L.Stop aeration, add glucose 1500g, carry out denitrification treatment,
Time is 1.25 hours, and temperature is 35 DEG C.Hydraulic detention time is 15 hours.
The results are shown in Table 1 for short-cut nitrification and denitrification treatment.
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Influent ammonium concentration (mg/L) | 240 | 220 | 300 |
| Water outlet ammonia nitrogen concentration (mg/L) | 36 | 25 | 43 |
| Ammonia nitrogen removal frank (%) | 85 | 89 | 86 |
| Effluent nitrate-nitrogen content (mg/L) | 22 | 16 | 31 |
| Water outlet nitrite nitrogen content (mg/L) | 51 | 43 | 56 |
| Water inlet sulfate concentration (mg/L) | 60 | 80 | 100 |
| Water outlet sulfate concentration (mg/L) | 196 | 212 | 241 |
The treatment side of the cellulosic ethanol waste water provided using the present invention is provided from the result of embodiment
Method, ammonia nitrogen removal frank is above 85%, and ammonia nitrogen removal effect is good, while the sulfate radical in wastewater effluent is dense
Degree is low.
The preferred embodiment of the present invention described in detail above, but, the present invention is not limited to above-mentioned reality
The detail in mode is applied, in range of the technology design of the invention, can be to technical side of the invention
Case carries out various simple variants, and these simple variants belong to protection scope of the present invention.
It is further to note that each particular technique described in above-mentioned specific embodiment is special
Levy, in the case of reconcilable, can be combined by any suitable means.In order to avoid need not
The repetition wanted, the present invention is no longer separately illustrated to various possible combinations.
Additionally, can also be combined between a variety of implementation methods of the invention, as long as its
Without prejudice to thought of the invention, it should equally be considered as content disclosed in this invention.
Claims (10)
1. a kind of processing method of cellulosic ethanol waste water, it is characterised in that the method includes, to containing
The sludge for having ammonia oxidation bacteria and NOB carries out acclimation, then using acclimation after
Sludge to carrying out short distance nitration treatment and denitrification successively by the cellulosic ethanol waste water after Anaerobic Treatment
Treatment；
Wherein, the condition of the short distance nitration treatment includes：Aeration time is 2-4 hours, and dissolved oxygen contains
It is 0.8-1.5mg/L to measure, and pH value is 7.5-8, and temperature is 30 DEG C -35 DEG C, with CaCO3The basicity of meter is
8000-9500mg/L；The condition of the denitrification treatment includes：Stop aeration, the time is that 0.5-1.5 is small
When, temperature is 30 DEG C -35 DEG C；The hydraulic detention time of short-cut nitrification and denitrification treatment is 10-30 hours.
2. processing method according to claim 1, wherein, the condition of the short distance nitration treatment
Including：Aeration time is 2.5-3.5 hours；Dissolved oxygen content is 0.8-1mg/L；PH value is 7.7-8,
Temperature is 30 DEG C -35 DEG C；With CaCO3The basicity of meter is 8500-9500mg/L；The denitrification treatment
Condition include：Time is 1-1.5 hours, and temperature is 30 DEG C -35 DEG C；Short-cut nitrification and denitrification treatment
Hydraulic detention time is 15-30 hours.
3. processing method according to claim 1, wherein, to containing ammonia oxidation bacteria and nitrous acid
The condition that the sludge of salt oxidation bacteria carries out acclimation includes：Aeration time is 3-4 hours, and dissolved oxygen contains
It is 1-1.5mg/L to measure, and the sedimentation time is 0.5-1 hours, and hydraulic detention time is 10-20 hours.
4. processing method according to claim 3, wherein, the flow condition of the acclimation
Including：Using the mixture of cellulosic ethanol waste water and water as water inlet, by the way of intermittent water inflow；Enter
Coolant-temperature gage is 30-35 DEG C, and pH value is 7.5-8.5, with CaCO3The basicity of meter is 8000-9500mg/L,
Ammonia nitrogen concentration is 80-120mg/L, and sulfate ion concentration is 50-100mg/L.
5. the processing method according to any one in claim 1-4, wherein, it is described to contain ammonia
The dissolved oxygen content of the sludge of oxidation bacteria and NOB is 1.5-3mg/L, and pH value is 7-8.
6. processing method according to claim 1, wherein, in the waste water that acclimation is obtained
When nitrite accumulation rate is more than 90%, the acclimation is completed.
7. processing method according to claim 1 and 2, wherein, it is described by after Anaerobic Treatment
Cellulosic ethanol waste water dissolved oxygen content be 0.8-1.5mg/L, pH value is 7.5-8.5, with CaCO3
The basicity of meter is 8000-9500mg/L, and ammonia nitrogen concentration is 200-300mg/L, and sulfate ion concentration is
50-100mg/L。
8. processing method according to claim 7, wherein, the condition of the Anaerobic Treatment includes：
Temperature is 30 DEG C -38 DEG C, and pH value is 7.8-8.5, and hydraulic detention time is 2.5-3.5 days.
9. processing method according to claim 1 and 2, wherein, the method is additionally included in described
Additional carbon is added in denitrification treatment, the additional carbon is selected from methyl alcohol, glucose and sodium acetate
At least one, preferably glucose and/or sodium acetate.
10. processing method according to claim 9, wherein, the addition of the additional carbon with
The weight ratio for carrying out the nitrite in the waste water of denitrification treatment is 1-2:1.
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