CN108163978A - A kind of method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate - Google Patents
A kind of method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate Download PDFInfo
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- CN108163978A CN108163978A CN201711474755.5A CN201711474755A CN108163978A CN 108163978 A CN108163978 A CN 108163978A CN 201711474755 A CN201711474755 A CN 201711474755A CN 108163978 A CN108163978 A CN 108163978A
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F3/00—Biological treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention belongs to the technical fields of ammonia nitrogen waste water processing, disclose a kind of method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate.Method is：(1) biological reaction apparatus equipped with filler is subjected to bio-film colonization；Biological reaction apparatus includes first order biological reaction apparatus and second level biological reaction apparatus；(2) first part of sodium carbonate is added in into water inlet water storage device, first part of sodium carbonate is uniformly mixed with ammonia nitrogen waste water；Then the ammonia nitrogen waste water for being added to sodium carbonate is sent into first order biological reaction apparatus and carries out nitrosation, be discharged after nitrosation and enter intermediate water storage device；Second part of sodium carbonate is added in into intermediate water storage device, is uniformly mixed, the waste water of intermediate water storage device is then sent into second level biological reaction apparatus, continues nitrosation, is discharged after the completion.The method of the present invention solves sodium carbonate and the problem of leading to high ph-values, microbial activity is made to be inhibited by free ammonia is added as external source basicity；The method cost of the present invention is lower.
Description
Technical field
The invention belongs to the technical fields of ammonia nitrogen waste water processing, and in particular to a kind of highly concentrated with sodium carbonate offer basicity realization
Spend the method for high-efficiency ammonia-nitrogen nitrosation.
Background technology
Ammonia nitrogen in waste water, is discharged into natural water, causes the eutrophication of natural water, makes water degradation, therefore waste water
In ammonia nitrogen must remove, reach discharge standard.Ammonia nitrogen in bioanalysis removing waste water, is place the most frequently used, most economical at present
Reason method.By principle of biological nitrogen removal, there are mainly three types of biological denitrification process：(1) nitration denitrification method：This is most common at present
Denitrification process, such as the A of sewage treatment plant2O methods, oxidation ditch process etc. all employ the denitrification process for nitrifying anti-nitre method, its principle
It is first the ammonia nitrogen in water to be converted into nitrite nitrogen by ammonia oxidation bacteria (AOB), then nitre state is converted by nitrogen oxidation bacterium (NOB)
Nitrogen, under the anaerobic condition for having carbon source, denitrification is translated into nitrogen.(2) nitrosation denitrification method：This method is by water
In ammonia nitrogen nitrite nitrogen is converted by ammonia oxidation bacteria (AOB), then, under the conditions of less carbon source is needed, directly by nitrous
Acid group is converted into nitrogen by denitrification.(3) anaerobic ammonia oxidation：Part ammonia nitrogen is converted into nitrite nitrogen by this method by AOB,
Then, nitrite nitrogen and ammonia nitrogen by the effect of anaerobic ammonia oxidizing bacteria, are converted into nitrogen.Because entire reaction needs not move through
Denitrification process, it is not required that additionally add carbon source, be considered as the most economical denitrogenation method of current low-carbon-source waste water.
In terms of the Principle Method of these three biological denitrificaions, carbon source is most needed for nitration denitrification, and needed for oxidation process
Oxygen is also most, and energy consumption is maximum, but since the reaction is easier to realize, is still widely used at present.And nitrosation denitrification
It is the hot spot of research and development in recent years because the carbon source of needs is less or does not need to carbon source, and low energy consumption with Anammox.
After nitrite nitrogen being converted into due to ammonia nitrogen under AOB effects, it is easy to further be oxidized to nitrate nitrogen by NOB, therefore how to inhibit
NOB by ammonium oxidation process control in the state of first step nitrosation, enables nitrite nitrogen to accumulate, becomes nitrosation denitrification
With the key of Anammox technology.Applicant has applied for patent of invention early period：A kind of short distance containing Zeolite-bio fluid bed
Nitration denitrification denitrogenation technique, patent application：CN201610630255.5；It is a kind of that efficient nitrosation is realized based on ammonia nitrogen waste water
Method, patent application：CN201710252762.4, it was found that using zeolite or artificial zeolite etc. with ammonia nitrogen absorption performance
Material serves as the medium of biological fluidized bed or bacteria bed, can steadily realize the nitrosation of ammonia nitrogen waste water.So as to be ammonia nitrogen
It is laid the first stone using more economical biological eliminating method.Since the process needs that ammonia nitrogen is converted into nitrite nitrogen under AOB effects disappear
A large amount of basicity are consumed, 1g ammonia nitrogens is theoretically converted, needs about 7.14g basicity (with calcium carbonate), the processing of ammonia nitrogen waste water is lacking
During basicity, how to add basicity and microorganism is enable to make full use of additional basicity is also to influence ammonia nitrogen waste water biological treatment economy
The principal element of property.
External source adds basicity, it is common to use sodium bicarbonate or sodium carbonate if the ammonia nitrogen concentration of waste water is higher, supplement carbonic acid
The amount of hydrogen sodium or sodium carbonate is bigger.Since sodium bicarbonate is almost the same with the price of sodium carbonate, and the sodium carbonate of similary weight,
The basicity for being about twice in sodium bicarbonate can be provided, therefore sodium carbonate is used to provide basicity, reagent cost only has sodium bicarbonate
Half.Wherein, the pH value amplification of nitrogen-containing wastewater is smaller when adding sodium bicarbonate, the biochemical process of waste water is influenced relatively also compared with
It is small, although therefore price some, be still used widely；During the basicity raw material handled using sodium carbonate as ammonia nitrogen waste water, give up
The pH value of water can be significantly increased, and under conditions of high ph-values, be substantially increased the concentration of free ammonia in ammonia nitrogen waste water, so as to also press down
The activity of AOB is made.So from the angle for saving basicity Expenses Cost, in nitrosation system in biofilter newly developed
In, if being added using sodium carbonate as external source basicity, must adjusting process flow, enable ammonia nitrogen nitrosation process economy and
Effec-tive Function.
Nitrosation-anaerobic ammoxidation technique need to only be incited somebody to action as biological denitrification method most economical at present by consuming basicity
Ammonia nitrogen carry out partial nitrification, when the ratio of nitrite nitrogen and ammonia nitrogen for 1.3 or so can under the action of anaerobic ammonia oxidizing bacteria shape
Into nitrogen, so as to complete denitrification process.In order to use the biological denitrification method of this economical and efficient, reported in literature basicity is to influence Asia
An important factor for degree of nitration, and be more to provide basicity using sodium bicarbonate, cost is twice to use sodium carbonate.Because highly concentrated
Spend ammonia nitrogen waste water nitrosation, added using sodium carbonate as external source basicity, deposit at a high ph microbial activity by free ammonia
The risk of inhibition, and because high the concentration of free ammonia strong inhibition that high ph-values are brought acts on so that system is difficult to realize stable Asia
Nitrification.Therefore, in the Short-Cut Nitrification Process of biologic packing material filter bed for having ammonia nitrogen absorption function, for sodium carbonate is used to provide basicity
Come handle ammonia nitrogen concentration reach more than 400mg/L ammonia nitrogen waste water, almost without it is relevant research report.In conclusion how to make
High ammonia-nitrogen wastewater realizes partial nitrification, and it is engineer application skill to carry out efficient biological denitrificaion to waste water through anaerobic ammonium oxidation process
The key of art.The partial nitrification that the present invention is directed to add cost by reducing basicity and realize high-concentration ammonia nitrogenous wastewater, the portion
Nitrosation is divided to refer to high-concentration ammonia nitrogenous wastewater after processing, the nitrite nitrogen of final outflow water and the ratio of ammonia nitrogen are 1.1~1.3, with
Influent quality requirement when meeting subsequent Anammox technology combination.
Invention content
The shortcomings that in order to overcome the prior art and deficiency, the purpose of the present invention is to provide a kind of sodium carbonate as nitrosation
Required basicity and the method for realizing the efficient nitrosation of high-concentration ammonia nitrogenous wastewater.The present invention uses relatively inexpensive sodium carbonate
Sodium bicarbonate is substituted as the basicity needed for nitrosation, realization ammonia nitrogen concentration is the partial nitrification of 400~800mg/L waste water,
So as to reduce the cost for adding basicity, and final outflow water is made to be suitable for Anammox technology.In addition, the present invention is thrown by substep
Sodium carbonate and the mode of multistage nitrosation is added to solve high ph-values caused by sodium carbonate is added as external source basicity and free ammonia suppression
The problem of system whole microbial activity.The present invention regulates and controls nitrosoation rate with basicity, makes under the premise of basicity is fully used, pH
The range for not inhibiting ammonia oxidation bacteria activity is maintained, provides and stablizes, reliably containing ammonia nitrogen, nitrous for the processing of further Anammox
The waste water of nitrogen.
The purpose of the present invention is achieved through the following technical solutions：
A kind of method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate, includes the following steps：
(1) into the biological reaction apparatus equipped with absorption ammonia nitrogen filler, inoculation nitrifying sludge carries out bio-film colonization；The life
Object reaction unit includes first order biological reaction apparatus and second level biological reaction apparatus；
(2) sodium carbonate is divided into two parts i.e. first part of sodium carbonate and second part of sodium carbonate；By first part of sodium carbonate add in into
Water water storage device, first part of sodium carbonate are uniformly mixed with ammonia nitrogen waste water in water inlet water storage device, obtain being added to the ammonia of sodium carbonate
Nitrogen waste water；Then the ammonia nitrogen waste water for being added to sodium carbonate is sent into first order biological reaction apparatus and carries out nitrosation, after nitrosation
Water outlet enters intermediate water storage device；Second part of sodium carbonate is added in into intermediate water storage device, is uniformly mixed, then by intermediate water storage
The waste water of device is sent into second level biological reaction apparatus, continues nitrosation, is discharged after the completion, so as to fulfill high-concentration ammonia nitrogenous wastewater
Partial nitrification.
The dosage of sodium carbonate described in step (2) is 1g ammonia nitrogen nitrosation, and sodium carbonate is needed to provide (4~5) g basicity；It is described
First part of sodium carbonate and second part of sodium carbonate equivalent.
Biological reaction apparatus described in step (1) be filter bed, biofilter or membrane bioreactor etc.；
The bio-film colonization of biological reaction apparatus, that is, first order biological reaction apparatus described in step (1) and second level biology are anti-
Device respectively independent carry out bio-film colonization is answered, specially：
1. filling adsorption ammonia nitrogen：Respectively absorption ammonia is added in first order biological reaction apparatus and second level biological reaction apparatus
Nitrogen filler, adds sodium carbonate, and the dosage of sodium carbonate presses basicity:Ammonia nitrogen=(3.5~4):1 is added, continuum micromeehanics, water inlet
Ammonia nitrogen concentration is 200~350mg/L, the residence time for 8~for 24 hours, in 0.1~7.0mg/L, temperature is 20~40 for dissolved oxygen control
℃；Until water outlet ammonia nitrogen concentration is 145~151mg/L, which completes；
2. biofilm：After completing 1., aerobic nitrifying sludge is added in, it is 0.2 that sludge, which adds quality with reactor volume ratio,
~50g/L stops water inlet, and in 0.1~7.0mg/L, temperature is 20~40 DEG C for dissolved oxygen control, bored exposure 1~3 day, after bored exposure, instead
It is 77~81mg/L to answer in device ammonia nitrogen concentration, during a concentration of 95~100mg/L of nitrite nitrogen, continues continuum micromeehanics, operation goes out for one week
Water ammonia nitrogen concentration stabilization is in 110~130mg/L, a concentration of 120~140mg/L of nitrite nitrogen, when nitrate nitrogen is below 15mg/L, biofilm
Bioreactor is tamed and start completion.
Ammonia nitrogen filler is adsorbed described in step (1) as one or more of natural zeolite, artificial zeolite, medical stone.
It intakes described in step (2) ammonia nitrogen waste water in water storage device, including all kinds of nitrogen-containing wastewaters and pretreated contains
Ammonia nitrogen waste water, wherein ammonia nitrogen concentration are 100~800mg/L, and plus before basicity pH is not 6.0~8.5, after adding basicity, pH 8.5
~9.5.
The condition of nitrosation is in first order biological reaction apparatus described in step (2)：20~40 DEG C of water temperature, dissolved oxygen is dense
It spends for 0.1~7.0mg/L, hydraulic detention time is 7~15h；
The condition of continuation nitrosation is in the biological reaction apparatus of the second level described in step (2)：20~40 DEG C of water temperature, dissolving
Oxygen concentration is 0.1~7.0mg/L, and hydraulic detention time is 7~15h；
Nitrite nitrogen and ammonia nitrogen mass ratio are (0.8~1.3) in being discharged described in step (2)：1.
First order biological reaction apparatus, intermediate water storage device and second level biological reaction apparatus are sequentially connected in series.
The nitrosation method of the present invention, suitable for the partial nitrification of 400mg/L~800mg/L ammonia nitrogen waste waters, if wishing
The ammonia nitrogen waste water of higher concentration is handled, processed waste water dilution method may be used, multistage adds basicity combination method or other low ammonia
Ammonia nitrogen waste water is diluted to the concentration of 800mg/L and hereinafter, the method for the present invention, which can be used, realizes height by the dilution method of nitrogen concentration water
The nitrosation of effect.When ammonia nitrogen concentration is less than 400mg/L in ammonia nitrogen waste water, whole can be added in first order biological reaction apparatus
Basicity.
In the present invention after the nitrosation of second level biological reaction apparatus, basicity is added in, adjusts ammonia nitrogen and nitrite nitrogen
Ratio, for Anammox processing, i.e., with the partial nitrification of basicity control high ammonia-nitrogen wastewater, applicable ammonia nitrogen concentration range
For 400~800mg/L.
The principle of the present invention is：
Free ammonia is of different sizes to the inhibiting effect of AOB and NOB in waste water, when free ammonia is 0.1~1.0mg/L, NOB
Start to be suppressed effect, free ammonia is higher, and inhibiting effect is bigger；And when free ammonia is 10~150mg/L, AOB just can quilt
Inhibit.Therefore, suitable the concentration of free ammonia range is controlled, may be such that NOB is inhibited by strong, and AOB is not inhibited or suppressed
Act on it is small, and then ensure ammonia nitrogen biochemical conversion rest on the nitrosation reaction stage, to realize Stable short-cut nitrosification.In addition, ammonia nitrogen
The nitrosation of waste water needs to consume a large amount of basicity, originally for the ammonia nitrogen of high concentration, adds basicity and often adds bicarbonate
Sodium.Since the price of sodium bicarbonate is more close with sodium carbonate, but basicity, only dosage, bicarbonate are done using sodium carbonate
The half of sodium, therefore the basicity expense of sodium bicarbonate is used, one times will be increased than sodium carbonate is used to do basicity.For being less than
Sodium carbonate can be incorporated in water inlet storage pool, since ammonia nitrogen is not high, accordingly add sodium carbonate by the ammonia nitrogen waste water of 400mg/L
It measures, only seven of ammonia nitrogen times or so, therefore has added sodium carbonate, increase the pH value into water limited, so as to by having added
Then sodium carbonate, with the filter column for being pumped into nitrosation, completes nitrosation.(it is more than 400mg/ when the ammonia nitrogen concentration of water inlet is too high
L), if being disposably incorporated sodium carbonate, it will the pH value for making water is excessively high, and the free ammonia in water is significantly increased, it is suppressed that micro- life
The activity of object, and the nitrosation reaction in waste water is suppressed, when pH value is higher than 9.5, nitrosation reaction also stops.
Based on this, in the present invention, the ammonia nitrogen absorption equilibrium state with ammonia nitrogen absorption characteristic filler in waste water is utilized
Ammonia nitrogen concentration to realize in reactor is stably maintained at optimum range, and then the concentration of free ammonia in reactor is maintained to be in suppression
NOB processed and the state for not inhibiting AOB substantially.On this basis, the basicity total amount of supplement sodium carbonate is controlled by substep, is reached
Suitable pH ranges are maintained, so as to ensure that the two-stage reactor of series connection all plays good partial nitrification effect, are realized
The efficient stable partial nitrification of final outflow water.
By the ammonia nitrogen in high density in waste water, through nitrosation reaction filter bed, by ammonia nitrogen nitrosation, be nitrosation-denitrification or
Anammox finally removes the pretreatment procedure of the ammonia nitrogen in waste water.Contain suitable for industrial circle or the fields such as cultivation, agricultural
Compared with the processing of wastewater with high ammonia nitrogen concentration.
The present invention has the following advantages and technique effect：
(1) basicity amount of the present invention needed for by substep offer nitrosation, can stablize the pH in reactor in suitable model
It encloses, realizes the efficient partial nitrification effect of reactor, avoid leading to reactor when excessively adding sodium carbonate and cause pH excessively high
The problem of biochemical system collapses；
(2) operating method of the present invention is simple, provides basicity with more economy compared to add sodium bicarbonate, basicity makes
About half can be saved with cost；
(3) present invention can realize water outlet ammonia nitrogen and nitrite nitrogen ratio by the dosage size control of basicity, steady to obtain
The water inlet of fixed suitable anaerobic ammonia oxidation process provides critical support for Anammox denitrogenation.
Description of the drawings
Fig. 1 is a kind of device that the basicity realization efficient nitrosation method of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate of the present invention
Schematic diagram；Wherein 1- water inlets water storage device, 2- intake pumps, 3- fluid flowmeters, 4,5- intermediate water storages device, 6- air pumps, 7- gas
Flowmeter body, 8- packing layers and biological membrane assembly, 9- first order biological reaction apparatus, 10- second level biological reaction apparatus.
Specific embodiment
With reference to specific embodiments and the drawings, the present invention is described in further detail, however, the present invention is not limited thereto.
A kind of device that the method that basicity realizes the efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate of the present invention shows
It is intended to as shown in Figure 1.The inventive system comprises water inlet water storage device (water inlet tank) 1, first order biological reaction apparatus 9,
Second level biological reaction apparatus 10, intermediate water storage device (intermediate water storage device 4, intermediate water storage device 5), the first order biology
The lower end of reaction unit 9 and second level biological reaction apparatus 10 is designed with water inlet, first order biological reaction apparatus 9 and the second level
Biological reaction apparatus 10 is designed with packing layer and biological membrane assembly 8, and water inlet is located at the lower section of packing layer, the first order biology
The bottom of reaction unit 9 and second level biological reaction apparatus 10 is designed with aerator, the first order biological reaction apparatus 9
Water inlet is connect with the water outlet for water storage device 1 of intaking by pipeline, and the pipeline is equipped with intake pump 2 and fluid flowmeter 3；
The upper end of the first order biological reaction apparatus 9 is equipped with water outlet, which is primary effluent mouth；The primary effluent mouth leads to
Piping is connect with intermediate water storage device 4 and intermediate water storage device 5；The intermediate water storage device 4 and intermediate water storage device 5 pass through
Pipeline is connect with the water inlet of second level biological reaction apparatus 10, which is equipped with intake pump and fluid flowmeter；
The aerator includes pipeline and air pump 6, and the pipeline is equipped with gas flowmeter 7.
It adds the amount of sodium carbonate for the second time according to the calculating of the water of intermediate water storage device, two intermediate water storage devices is set,
Intermediate water storage device 4 and intermediate water storage device 5 are used alternatingly.
According to basicity needed for ammonia nitrogen nitrosation in ammonia nitrogen waste water, the dosage of sodium carbonate is calculated；The sodium carbonate it is specific
Operation is as follows：By ammonia nitrogen in waste water, the basicity as needed for partial nitrification calculates the amount of sodium carbonate, theoretically, removes 1g ammonia nitrogens, needs
Sodium carbonate provides 3.57g basicity, and the present invention is ensures that final outflow water still has enough basicity to be suitable for Anammox technology, by de-
Except 1g ammonia nitrogens are added for the sodium carbonate of 4~5g basicity amounts, i.e. basicity:Ammonia nitrogen=(4~5):1 (basicity is with calcium carbonate),
And it is divided into impartial two parts.First order biological reaction apparatus adds a copy of it, another application method is：According to
Primary effluent amount calculates the sodium carbonate amount of input intermediate water storage device (when adding the waste water of first part of sodium carbonate all by first
Grade biological reaction apparatus adds in into the intermediate water storage device second part of whole sodium carbonate when entering intermediate water storage device, then
The water decision of amount, i.e. ceramic filter adds ratio).
Embodiment 1
A kind of method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate, includes the following steps：
The biofilm acclimation method of (1) two biofilm reactor：
1. filling adsorption ammonia nitrogen：The natural zeolite that grain size is 0.5~2mm is separately added into two biofilm reactors, is pressed
Basicity:Ammonia nitrogen=4:1 (basicity using calcium carbonate) adds sodium carbonate as basicity, continuum micromeehanics, and influent ammonium concentration is
250mg/L, residence time 8h, for the control of reactor dissolved oxygen in 0.1~7.0mg/L, temperature is 20~40 DEG C；Until water outlet ammonia
Nitrogen concentration is about 150mg/L, which completes；
2. biofilm：After completing 1., aerobic nitrifying sludge is added in, it is 0.2 that sludge, which adds quality with reactor volume ratio,
~50g/L stops water inlet, bored to expose 1~3 day, detects ammonia nitrogen, nitrite nitrogen, nitrate nitrogen concentration, pH value in reactor daily；After bored exposure,
Reactor ammonia nitrogen concentration is about 80mg/L, when nitrous nitrogen concentration is about 100mg/L, continues continuum micromeehanics (with 1. middle influent ammonia nitrogen
Concentration is consistent), one week water outlet ammonia nitrogen concentration stabilization is run in 110~130mg/L, a concentration of 120~140mg/L of nitrite nitrogen, nitre
When nitrogen is below 15mg/L, the domestication of biofilm bioreactor and start completion, available for handling high-concentration ammonia nitrogenous wastewater in next step；
Intermediate water storage device sets two, is used alternatingly；
(2) ammonia nitrogen concentration of ammonia nitrogen waste water is 400mg/L in water inlet water storage device, by basicity:Ammonia nitrogen=4:1 (basicity with
Calcium carbonate) sodium carbonate dosage is calculated, carry out partial nitrification；By sodium carbonate be divided into impartial two parts i.e. first part sodium carbonate with
Second part of sodium carbonate；First part of sodium carbonate is added in into water inlet water storage device, first part of sodium carbonate and ammonia nitrogen in water inlet water storage device
Waste water is uniformly mixed, and obtains being added to the ammonia nitrogen waste water of sodium carbonate；Then the ammonia nitrogen waste water for being added to sodium carbonate is sent into first
Grade biological reaction apparatus carries out nitrosation, and (condition of nitrosation is that hydraulic detention time is 8h, and 25~30 DEG C, dissolved oxygen control exists
4~6mg/L is added to the ammonia nitrogen waste water pH=8.8 of sodium carbonate), (pH=7.5~8.5) are discharged after nitrosation and enter intermediate store up
Water installations；Second part of sodium carbonate is added in into intermediate water storage device and (adds in the accordingly according to moisture storage capacity in intermediate water storage device
Two parts of sodium carbonate), it is uniformly mixed, the waste water (pH=8.5~9) of intermediate water storage device is then sent into second level biological respinse dress
It puts, continues nitrosation (condition of nitrosation is that hydraulic detention time is 8h, and 25~30 DEG C, dissolved oxygen is controlled in 4~6mg/L),
It is discharged (pH=7.8~8.4) after the completion；After a week, first order biological reaction apparatus carries out the water outlet after nitrosation for stable operation
Ammonia nitrogen concentration is 250~300mg/L, and nitrite nitrogen is 90~140mg/L, and nitrate nitrogen concentration is less than 8mg/L；Second level biological respinse dress
It puts after carrying out nitrosation, water outlet ammonia nitrogen concentration is 170~200mg/L, and nitrite nitrogen is 180~210mg/L, and nitrate nitrogen concentration is less than
15mg/L, by two-stage biological reaction unit, the nitrite nitrogen of final outflow water and the ratio of ammonia nitrogen are 0.8~1.2.Experiment shows
Under 400mg/L ammonia nitrogen concentrations, adding sodium carbonate by two-stage segmentation can realize that basicity controls nitrosoation rate, and avoid primary
Property add the high pH that sodium carbonate brings and inhibit.
Embodiment 2
A kind of method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate, includes the following steps：
The startup of (1) two biofilm reactor, it is same as Example 1；
(2) ammonia nitrogen concentration of ammonia nitrogen waste water is 600mg/L in water inlet water storage device, by basicity:Ammonia nitrogen=4:1 (basicity with
Calcium carbonate) sodium carbonate dosage is calculated, carry out partial nitrification；By sodium carbonate be divided into impartial two parts i.e. first part sodium carbonate with
Second part of sodium carbonate；First part of sodium carbonate is added in into water inlet water storage device, first part of sodium carbonate and ammonia nitrogen in water inlet water storage device
Waste water is uniformly mixed, and obtains being added to the ammonia nitrogen waste water of sodium carbonate；Then the ammonia nitrogen waste water for being added to sodium carbonate is sent into first
Grade biological reaction apparatus carries out nitrosation, and (condition of nitrosation is that hydraulic detention time is 8h, and 25~30 DEG C, dissolved oxygen control exists
4~6mg/L is added to the ammonia nitrogen waste water pH=9.1 of sodium carbonate), (pH=8~8.5) are discharged after nitrosation into intermediate water storage
Device；Second part of sodium carbonate is added in into intermediate water storage device and (adds in second accordingly according to moisture storage capacity in intermediate water storage device
Part sodium carbonate), it is uniformly mixed, the waste water (pH=8.6~9) of intermediate water storage device is then sent into second level biological respinse dress
It puts, continues nitrosation (condition of nitrosation is that hydraulic detention time is 8h, and 25~30 DEG C, dissolved oxygen is controlled in 4~6mg/L),
It is discharged (pH=8.2~8.6) after the completion；After a week, first order biological reaction apparatus carries out the water outlet after nitrosation for stable operation
420~500mg/L, nitrite nitrogen are 120~160mg/L, and nitrate nitrogen concentration is less than 10mg/L；Second level biological reaction apparatus carries out sub-
After nitrification, water outlet ammonia nitrogen concentration is 280~320mg/L, and nitrite nitrogen is 250~300mg/L, and nitrate nitrogen concentration is less than 15mg/L, warp
Two-stage biological reaction unit is crossed, the nitrite nitrogen of final outflow water and the ratio of ammonia nitrogen are 0.8~1.1.Experiment shows in 600mg/L
Under ammonia nitrogen concentration, adding sodium carbonate by two-stage segmentation can realize that basicity controls nitrosoation rate, and avoids and add sodium carbonate band
The high pH come inhibits.
Embodiment 3
A kind of method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate, includes the following steps：
The making of (1) two biofilm reactor and the biofilm culture of biomembrane, it is same as Example 1.
(2) ammonia nitrogen concentration of ammonia nitrogen waste water is 800mg/L in water inlet water storage device, by basicity:Ammonia nitrogen=4:1 (basicity with
Calcium carbonate) sodium carbonate dosage is calculated, carry out partial nitrification；By sodium carbonate be divided into impartial two parts i.e. first part sodium carbonate with
Second part of sodium carbonate；First part of sodium carbonate is added in into water inlet water storage device, first part of sodium carbonate and ammonia nitrogen in water inlet water storage device
Waste water is uniformly mixed, and obtains being added to the ammonia nitrogen waste water of sodium carbonate；Then the ammonia nitrogen waste water for being added to sodium carbonate is sent into first
Grade biological reaction apparatus carries out nitrosation, and (condition of nitrosation is that hydraulic detention time is 8h, and 25~30 DEG C, dissolved oxygen control exists
3~4mg/L is added to the ammonia nitrogen waste water pH=9.3 of sodium carbonate), (pH=8.6~8.8) are discharged after nitrosation and enter intermediate store up
Water installations；Second part of sodium carbonate is added in into intermediate water storage device and (adds in the accordingly according to moisture storage capacity in intermediate water storage device
Two parts of sodium carbonate), it is uniformly mixed, the waste water (pH=8.8~9.2) of intermediate water storage device is then sent into second level biological respinse
Device, continuing nitrosation, (condition of nitrosation is that hydraulic detention time is 8h, and 25~30 DEG C, dissolved oxygen is controlled in 3~4mg/
L), it is discharged (pH=8.4~8.7) after the completion；Stable operation after a week, first order biological reaction apparatus carry out nitrosation after going out
Water ammonia nitrogen concentration is 550~600mg/L, and nitrite nitrogen is 180~240mg/L, and nitrate nitrogen concentration is less than 15mg/L；Second level biology is anti-
After device is answered to carry out nitrosation, water outlet ammonia nitrogen concentration is 400~450mg/L, and nitrite nitrogen is 330~380mg/L, and nitrate nitrogen concentration is low
In 20mg/L, by two-stage biological reaction unit, the nitrite nitrogen of final outflow water and the ratio of ammonia nitrogen are 0.7~1.1.Test table
Bright, under 800mg/L ammonia nitrogen concentrations, adding sodium carbonate by two-stage segmentation can realize that basicity controls nitrosoation rate, and avoids
The high pH that sodium carbonate is brought is added to inhibit.
Above example is the preferable embodiment of the present invention, but embodiments of the present invention are not limited by examples detailed above,
It is other it is any for away from spirit of the invention with made under principle change, modification, replacement, combine, simplification is equivalent.
Claims (9)
- A kind of 1. method that the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided with sodium carbonate, it is characterised in that：Including Following steps：(1) into the biological reaction apparatus equipped with absorption ammonia nitrogen filler, inoculation nitrifying sludge carries out bio-film colonization；The biology is anti- Device is answered to include first order biological reaction apparatus and second level biological reaction apparatus；(2) sodium carbonate is divided into two parts i.e. first part of sodium carbonate and second part of sodium carbonate；First part of sodium carbonate is added in into water inlet storage Water installations, first part of sodium carbonate are uniformly mixed with ammonia nitrogen waste water in water inlet water storage device, and the ammonia nitrogen for obtaining being added to sodium carbonate gives up Water；Then the ammonia nitrogen waste water for being added to sodium carbonate is sent into first order biological reaction apparatus and carries out nitrosation, be discharged after nitrosation Into intermediate water storage device；Second part of sodium carbonate is added in into intermediate water storage device, is uniformly mixed, then by intermediate water storage device Waste water be sent into second level biological reaction apparatus, continue nitrosation, be discharged after the completion, so as to fulfill the portion of high-concentration ammonia nitrogenous wastewater Divide nitrosation.
- 2. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 1 with sodium carbonate, It is characterized in that：The dosage of sodium carbonate described in step (2) is 1g ammonia nitrogen nitrosation, and sodium carbonate is needed to provide (4~5) g basicity；It is described First part of sodium carbonate and second part of sodium carbonate equivalent.
- 3. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 1 with sodium carbonate, It is characterized in that：The bio-film colonization of biological reaction apparatus, that is, first order biological reaction apparatus described in step (1) and second level biology The respective independent carry out bio-film colonization of reaction unit, specially：1. filling adsorption ammonia nitrogen：Absorption ammonia nitrogen is added in first order biological reaction apparatus and second level biological reaction apparatus respectively to fill out Material, adds sodium carbonate, continuum micromeehanics, and influent ammonium concentration is 200~350mg/L, the residence time for 8~for 24 hours, dissolved oxygen control In 0.1~7.0mg/L, temperature is 20~40 DEG C；Until water outlet ammonia nitrogen concentration is 145~151mg/L, which completes；2. biofilm：After completing 1., add in aerobic nitrifying sludge, sludge add quality and reactor volume ratio for 0.2~ 50g/L stops water inlet, and in 0.1~7.0mg/L, temperature is 20~40 DEG C, bored to expose 1~3 day for dissolved oxygen control, after bored exposure, reaction Ammonia nitrogen concentration is 77~81mg/L in device, during a concentration of 95~100mg/L of nitrite nitrogen, continues continuum micromeehanics, operation water outlet in one week Ammonia nitrogen concentration stabilization is in 110~130mg/L, a concentration of 120~140mg/L of nitrite nitrogen, when nitrate nitrogen is below 15mg/L, biofilm life Object reactor is tamed and start completion.
- 4. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 3 with sodium carbonate, It is characterized in that：The dosage of sodium carbonate presses basicity:Ammonia nitrogen=(3.5~4):1 is added.
- 5. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 1 with sodium carbonate, It is characterized in that：Ammonia nitrogen waste water ammonia nitrogen concentration is 100~800mg/L in water inlet water storage device described in step (2), and plus before basicity pH is not 6.0~8.5, after adding basicity, pH is 8.5~9.5.
- 6. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 1 with sodium carbonate, It is characterized in that：The condition of nitrosation is in first order biological reaction apparatus described in step (2)：20~40 DEG C of water temperature, dissolved oxygen A concentration of 0.1~7.0mg/L, hydraulic detention time are 7~15h；The condition of continuation nitrosation is in the biological reaction apparatus of the second level described in step (2)：20~40 DEG C of water temperature, dissolved oxygen is dense It spends for 0.1~7.0mg/L, hydraulic detention time is 7~15h.
- 7. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 1 with sodium carbonate, It is characterized in that：Nitrite nitrogen and ammonia nitrogen mass ratio are (0.8~1.3) in being discharged described in step (2)：1.
- 8. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 1 with sodium carbonate, It is characterized in that：Ammonia nitrogen filler is adsorbed described in step (1) as one or more of natural zeolite, artificial zeolite, medical stone.
- 9. the method for the basicity realization efficient nitrosation of high-concentration ammonia nitrogenous wastewater is provided according to claim 1 with sodium carbonate, It is characterized in that：Water outlet in the biological reaction apparatus of the second level after the completion of continuation nitrosation is used for nitrosation-denitrification or anaerobism ammonia Oxidation processes.
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