CN107043169A - Wastewater treatment equipment and method of wastewater treatment - Google Patents
Wastewater treatment equipment and method of wastewater treatment Download PDFInfo
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- CN107043169A CN107043169A CN201710064409.3A CN201710064409A CN107043169A CN 107043169 A CN107043169 A CN 107043169A CN 201710064409 A CN201710064409 A CN 201710064409A CN 107043169 A CN107043169 A CN 107043169A
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- waste water
- wastewater treatment
- nitrogen
- nitrification
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The application provides the wastewater treatment equipment and method of wastewater treatment that also can be effectively denitrogenated when open system is employed ammoniacal nitrogen in the situation of the wastewater treatment of the aerobic lower direct microorganism for carrying out nitrogen.The wastewater treatment equipment (1) of the present invention is to employ the device that the direct nitrogen bacterium of aerobism is handled the waste water of at least one containing organic nitrogen and ammoniacal nitrogen, possesses the treatment trough (11) handled waste water, the first adding set (12) and the second adding set (13) to waste water addition nitrification obstruction material to the waste water addition direct nitrogen bacterium of aerobism.The method of wastewater treatment of the present invention is the method handled using the direct nitrogen bacterium of aerobism in treatment trough (11) the waste water of at least one containing organic nitrogen and ammoniacal nitrogen, and the second addition process that nitrification hinders material is added with the first addition process that the direct nitrogen bacterium of aerobism is added to waste water and to waste water.
Description
Technical field
The present invention relates to a kind of wastewater treatment equipment and waste water of at least one containing organic nitrogen and ammoniacal nitrogen
Processing method.
Background technology
As the method that biological processes are carried out to the waste water (nitrogenous effluent) containing nitrogen, commonly known has digestive juice to follow
Ring mode or interior raw denitrogenation mode etc..
In liquor recycling mode, first, by nitrobacteria under aerobic conditions by the ammoniacal nitrogen in raw water (waste water)
Be converted to nitrite nitrogen or nitric nitrogen.Afterwards, using organic matter as reducing power, by denitrifying bacteria under anaerobic
Nitrite nitrogen or nitric nitrogen are reduced to nitrogen.
Nitrobacteria is that ammoniacal nitrogen is oxidized into the ammonia oxidizing bacteria of nitrous acid and nitrite nitrogen is oxidized into nitric acid
The general name of the nitrite-oxidizing bacteria of state nitrogen.
On the other hand, denitrifying bacteria is one kind under anaerobic by regarding nitrite nitrogen or nitric nitrogen as electronics
Receiving body, gives body as electronics using organic matter and utilizes, thus nitrite nitrogen or nitric nitrogen are restored to micro- life of nitrogen
Thing.
In recent years, the method handled as the waste water containing high strength ammonia to livestock products, food etc., proposition has use
The facture of No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814), No.4 plants of the Bacillus foecalis alkaligenes can be aerobic lower by ammonia state
Nitrogen is changed into nitrogen and carries out denitrogenation (referring for example to patent document 1,2).
No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814) is a kind of the direct nitrogen bacterium of aerobism, is heterotroph, with
The direct gas of ammonia lower can be turned to nitrogen by this aerobic simultaneously.In addition, compared with existing nitrobacteria, with denitrogenating speed
Degree is fast, growth rate also fast advantage.
In addition, needing 2 grooves of aerobic groove (nitrifying groove) and anaerobic groove (denitrifying tank) in liquor recycling mode as processing
Groove, and the facture of No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814) is employed due to only can just be denitrogenated with aerobic treatment,
Therefore have the advantages that 1 groove can be carried out processing.
Prior art literature
Patent document
Patent document 1：Japanese Patent Laid-Open 2002-199875 publications
Patent document 2：Japanese Unexamined Patent Publication 2008-104361 publications
The content of the invention
The invention problem to be solved
If however, carrying out employing the wastewater treatment of the direct nitrogen bacterium of aerobism in open system, existing and removing
The situation of nitrogen rate reduction.
It is an object of the invention to provide such wastewater treatment equipment and method of wastewater treatment：Even in open system
Employed by ammoniacal nitrogen in the situation of the wastewater treatment of the aerobic lower direct microorganism for carrying out nitrogen, also can be effectively
Denitrogenated.
To the means to solve the problem
The result that the present inventor attentively studies, has found out：If using the direct nitrogen bacterium of aerobism in open system
Wastewater treatment is carried out, then the miscellaneous bacteria in waste water or in air can become to be prioritized in treatment trough, so as to there is nitrobacteria meeting
Situation about being bred in treatment trough.If there is nitrobacteria, the ammoniacal nitrogen in waste water can be converted into nitrite nitrogen or nitre
Acid-state nitrogen.Although ammoniacal nitrogen can directly be carried out nitrogen by the direct nitrogen bacterium of aerobism, can not by nitric nitrogen or
Nitrite nitrogen carries out nitrogen.Therefore, if ammoniacal nitrogen is converted into nitrite nitrogen or nitric nitrogen, under aerobic conditions
Can not be by these nitrogen, as a result direct nitrogen gasification reaction can be suppressed.
Therefore, the inventors discovered that：In the wastewater treatment for employing the direct nitrogen bacterium of aerobism, by and with suppression
Make the nitrification that nitration reaction is suppressed by nitrobacteria and hinder material, ammoniacal nitrogen can be pressed down to nitrite nitrogen or nitric nitrogen conversion
System, can efficiently carry out direct nitrogen gasification reaction and denitrogenate, so as to complete the present invention.
That is, the present invention has following mode.
[1] a kind of wastewater treatment equipment, is to employ the direct nitrogen bacterium of aerobism to containing organic nitrogen and ammonia
The device that the waste water of at least one of state nitrogen is handled, it is characterised in that the wastewater treatment equipment possesses：To the waste water
The treatment trough handled, adds the first adding set of the direct nitrogen bacterium of aerobism to the waste water and is given up to described
Water addition nitrification hinders the second adding set of material.
[2] wastewater treatment equipment according to [1], is further equipped with storing the waste water in the upstream of the treatment trough
Raw water retention basin.
[3] wastewater treatment equipment according to [1], first adding set is that the waste water addition into treatment trough is needed
The device of the direct nitrogen bacterium of oxygen, second adding set is that the waste water addition nitrification into treatment trough hinders material
Device.
[4] wastewater treatment equipment according to [2], first adding set is that the waste water addition into treatment trough is needed
The device of the direct nitrogen bacterium of oxygen, second adding set is that the waste water addition nitrification in being stored to raw water hinders material
Device.
[5] wastewater treatment equipment according to any one of [1]~[4], the direct nitrogen bacterium of aerobism
It is No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814).
[6] according to the wastewater treatment equipment described in any one of [1]~[5], the nitrification hinder material be selected from by
The chloro- 6- methylpyrimidines of thiocarbamide, allylthiourea, 2- amino -4-, 2-mercaptobenzothiazole, dicyanodiamine, sulphathiazole, 1- amidines
Base -2- thiocarbamides, N-2,5- dichlorophenyls succinamic acid, 4- amino -1,2,4- triazoles hydrochloride, 3- sulfydryl -1,2,4- triazoles
More than a kind in the group of composition.
[7] according to the wastewater treatment equipment described in [6], the nitrification hinder material be selected from by thiocarbamide, allylthiourea,
More than a kind in the group of 1- amidino groups -2- thiocarbamides composition.
[8] a kind of method of wastewater treatment, is to use the direct nitrogen bacterium of aerobism in treatment trough to containing organic
The method that the waste water of at least one of nitrogen and ammoniacal nitrogen is handled, it is characterised in that with aerobic to waste water addition
Property direct nitrogen bacterium first addition process and to the waste water add nitrification hinder material second addition process.
[9] method of wastewater treatment according to [8], by the wastewater retentive of before processing in raw water retention basin.
[10] method of wastewater treatment according to [8], the first addition process is the waste water addition into treatment trough
The process of the direct nitrogen bacterium of aerobism, the second addition process is that the waste water addition nitrification into treatment trough hinders material
Process.
[11] method of wastewater treatment according to [9], the first addition process is the waste water addition into treatment trough
The process of the direct nitrogen bacterium of aerobism, the second addition process is the waste water addition nitrification obstruction in being stored to raw water
The process of matter.
[12] method of wastewater treatment according to any one of [8]~[11], adds 0.3~80mg's to 1L waste water
Nitrification hinders material.
[13] method of wastewater treatment according to [12], the nitrification that 0.75~55mg is added to 1L waste water hinders material.
[14] method of wastewater treatment according to any one of [8]~[13], the direct nitrogenization of aerobism is thin
Bacterium is No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814).
[15] method of wastewater treatment according to any one of [8]~[14], the nitrification hinders material to be to be selected from
By thiocarbamide, allylthiourea, the chloro- 6- methylpyrimidines of 2- amino -4-, 2-mercaptobenzothiazole, dicyanodiamine, sulphathiazole, 1-
Amidino groups -2- thiocarbamides, N-2,5- dichlorophenyls succinamic acid, 4- amino -1,2,4- triazoles hydrochloride, 3- sulfydryls -1,2,4- three
One or more of group of azoles composition.
[16] method of wastewater treatment according to [15], the nitrification hinder material to be selected from by thiocarbamide, allyl sulfide
More than a kind in urea, the group of 1- amidino groups -2- thiocarbamides composition.
Invention effect
According to the wastewater treatment equipment and method of wastewater treatment of the present invention, used in open system by ammoniacal nitrogen
When the microorganism of aerobic lower direct nitrogen carries out the situation of wastewater treatment, also can effectively it be denitrogenated.
Brief description of the drawings
Fig. 1 is the schematic configuration diagram of one for showing the wastewater treatment equipment of the present invention.
Fig. 2 is the schematic configuration diagram for the other examples for showing the wastewater treatment equipment of the present invention.
Symbol description
1 wastewater treatment equipment
2 wastewater treatment equipments
11 treatment troughs
12 first adding sets
The tanks of 12a first
The supply line of 12b first
The pumps of 12c first
13 second adding sets
The tanks of 13a second
The supply line of 13b second
The pumps of 13c second
14 processing water retention basins
15 first waste water streams
16 processing current roads
17 aerators
17a air blowers
18 raw water retention basins
18a mixers
19 second waste water streams
21 the 3rd waste water stream roads
Embodiment
Hereinafter, one of embodiments of the present invention is explained, but these embodiments can not be defined to and solved
Release the present invention.
Further, in the present invention, " organism nitrogen " refers to nitrogen contained in organic principle, typically protein or amino acid.
In addition, so-called " nitrobacteria " is that ammoniacal nitrogen is oxidized into the ammonia oxidizing bacteria of nitrous acid and by nitrite nitrogen
It is oxidized to the general name of the nitrite-oxidizing bacteria of nitric nitrogen.Nitrobacteria is autotrophic bacterium, and general growth rate is smaller, numerous in addition
Grow or activity is easily hindered by low temperature or raw water Poisoning material.
In addition, " the direct nitrogen bacterium of aerobism " refers to ammoniacal nitrogen is carried out to heterotrophism into nitrogen under aerobic conditions
Microorganism.In addition, being also that organism nitrogen is changed into the microorganism of (oxidation) into ammoniacal nitrogen.
So-called " nitrification hinder material " is to hinder the ammoxidation reaction that is carried out by ammonia oxidizing bacteria or by nitrite-oxidizing
The material for the nitrite-oxidizing reaction that bacterium is carried out.
" first embodiment "
<Wastewater treatment equipment>
Fig. 1 is the schematic configuration diagram of the wastewater treatment equipment 1 of the first embodiment of the present invention.
The wastewater treatment equipment 1 of this possess waste water is handled treatment trough 11, to waste water add aerobism it is direct
The first adding set 12 of nitrogen bacterium, to waste water add nitrification hinder material the second adding set 13 and store treated
Waste water (processing water) processing water retention basin 14.
Further, in the present invention, the waste water of before processing is also known as " raw water ", and the waste water after processing is also known as " processing water ".
(waste water)
The waste water of process object as the present invention is the processed water from discharges such as factory, institution, containing organic
At least one of state nitrogen and ammoniacal nitrogen.
Organism nitrogen is converted into ammoniacal nitrogen by the effect of microorganism under anaerobic condition or aerobic condition.As containing
The waste water for having more organism nitrogen has enumerated food wastewater, livestock products waste water etc..
As the nitrogen component beyond organism nitrogen, there is the inorganic body nitrogen of ammoniacal nitrogen, nitric nitrogen, nitrite nitrogen etc..
(treatment trough)
Treatment trough 11 is the groove that microorganism (activated sludge) is filled to carry out biological wastewater processing, in this embodiment party
The direct nitrogen bacterium of aerobism is included in formula.
In treatment trough 11, the first waste water stream 15 and processing current road 16 are connected with.First waste water stream 15 is to make
The stream for managing groove 11 everywhere is flowed into from the waste water of the discharges such as factory, institution.On the other hand, processing current road 16 is to make
The processing water that treatment trough 11 is discharged is flowed into the stream of processing water retention basin 14 described later.
In addition, in treatment trough 11, to maintain the aerobic condition in groove to be provided with aerator 17.It is used as aerator
17, as long as the device of the air sent out from air blower 17a aeration in treatment trough 11 can be just not particularly limited.
PH, oxidation-reduction potential, water temperature, the meter device of ammonia density determined in groove is set in preferred process groove 11
(diagram is omited).
PH controls are even more important in biological respinse, when the pH in groove is acidification or alkalization, preferably further set
The device (diagram is omited) for adding alkaline solution or acid solution is put, according to the pH in groove by alkaline solution or acid molten
Liquid is added to treatment trough 11.
(the first adding set)
First adding set 12 is the device that the direct nitrogen bacterium of aerobism is added into waste water.
The first adding set 12 of this adds the direct nitrogen bacterium of aerobism into the waste water for the treatment of trough 11.
First adding set 12, which possesses, stores the first tank 12a of the direct nitrogen bacterium of aerobism, from the first tank 12a to useless
Water supplies the first supply line 12b of the direct nitrogen bacterium of aerobism, and sends out the first of the direct nitrogen bacterium of aerobism
Pump 12c.
It is preferred that being equipped with heating mechanism or cooling body in the first tank 12a temperature in tank is maintained into mild temperature.Tank
Preferably 0~15 DEG C of interior temperature.
As the direct nitrogen bacterium of aerobism, No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814), excrement production alkali have been enumerated
The bacterial strains such as OKK17 plants of bacillus.Wherein, preferably Bacillus foecalis alkaligenes No.4 plants (FERM P-21814).No.4 plants of Bacillus foecalis alkaligenes
The maximum of (FERM P-21814) is 29mgN/L/hr except ammonia speed, with compared with the direct nitrogen bacterium of other aerobisms
Very high denitrogenates performance.
(the second adding set)
Second adding set 13 is the device that addition nitrification hinders material into waste water.
The second adding set 13 of this adds nitrification into the waste water for the treatment of trough 11 and hinders material.
Second adding set 13, which possesses, to be stored the second tank 13a of nitrification obstruction substance solution, is supplied from the second tank 13a to waste water
The second supply line 13b of substance solution is hindered to nitrification, and sends out the second pump 13c that nitrification hinders substance solution.
In addition, when nitrification hinder material be powder when, can also will store powder shaped nitrification hinder material container with
Powder input is applied in combination with equipment, to substitute the second tank 13a, the second supply line 13b and the second pump 13c.
Material is hindered as nitrification, chemical substances such as the heavy metal classes such as copper or zinc, cyanogen or phenol etc. have been enumerated.These nitrification resistances
Material is hindered to there is a situation where similarly to hinder its active the most of microorganism for constituting activated sludge beyond nitrobacteria.
Nitrification is hindered in material, in terms of it specifically can hinder nitration reaction, preferably thiocarbamide, allylthiourea, 2-
The chloro- 6- methylpyrimidines of amino -4-, 2-mercaptobenzothiazole, dicyanodiamine, sulphathiazole, 1- amidino groups -2- thiocarbamides, N-2,5- bis-
Chlorphenyl succinamic acid, 4- amino -1,2,4- triazoles hydrochloride, 3- sulfydryl -1,2,4- triazoles.These can be used alone 1
Kind, and two or more can also be used.
In terms of cheap and to the microorganism beyond nitrobacteria influence is few, particularly preferred thiocarbamide in these materials,
Allylthiourea, 1- amidino groups -2- thiocarbamides.For example, allylthiourea is by hindering the respiratory metabolism Lu Jingxiang with ammonia oxidizing bacteria
The ammona monooxygenase of pass and hinder nitrification.
(processing water retention basin)
Processing water retention basin 14 is the groove for storing the waste water (processing water) after processing.
Processing current road 16 is connected with processing water retention basin 14, flowing into has the processing water discharged from treatment trough 11.
<Method of wastewater treatment>
In the method for wastewater treatment for employing the wastewater treatment equipment 1 shown in Fig. 1, make first from factory, institution
The waste water of discharge flows into treatment trough 11 by the first waste water stream 15.Then, from the first adding set 12 to treatment trough 11
In waste water addition aerobism direct nitrogen bacterium (the first addition process), from the second adding set 13 into treatment trough 11
Waste water addition nitrification hinders material (the second addition process).The aerator 17 in treatment trough 11 is worked, will be maintained in groove
Aerobic condition, carries out biological wastewater processing.Then, the ammoniacal nitrogen in waste water is by the direct nitrogen bacterium nitrogen of aerobism,
Denitrification is removed from waste water.Further, when containing organic nitrogen in waste water, organic nitrogen is in the effect as described above by microorganism
It is converted into after ammoniacal nitrogen, nitrogen is imposed by the direct nitrogen bacterium of aerobism.
Processed waste water is supplied to processing water retention basin as processing water from treatment trough 11 by handling current road 16
14 and stored.
First addition process and the second addition process can be carried out simultaneously, can also carry out the after the first addition process
Two addition processes, can also carry out first after the second addition process and add process.Especially, first is preferably carried out simultaneously to add
Process and the second addition process, or process is added in progress first after the second addition process.
From the viewpoint of performance or thalline sedimentation separation etc. is denitrogenated, the addition of the direct nitrogen bacterium of aerobism is preferred
It is the amount for making the dry weight concentration in treatment trough 11 reach 2000~20000mg/L.
The addition of nitrification obstruction material is 0.3~80mg, more preferably 0.5~75mg preferably with respect to 1L waste water, enters one
Walk preferably 0.75~55mg, particularly preferred 1~50mg.
If ammoniacal nitrogen is converted into nitrite nitrogen or nitric nitrogen as described above by the effect of nitrobacteria,
It is difficult to the direct nitrogen bacterium of aerobism directly to these material denitrogenations, denitrogenates efficiency reduction.
If nitrification hinders the addition of material in more than 0.3gm/L, it can fully suppress nitration reaction, therefore can drop
The low reduction for denitrogenating efficiency.
But, if nitrification hinders the addition of material to become superfluous, carried out by the direct nitrogen bacterium of aerobism
Oxidation operation or nitrogen are possible to hindered.In addition, passing through heterotroph (its beyond the direct nitrogen bacterium of aerobism
His heterotroph) oxidation operation that carries out be also possible to it is hindered.As a result, there is nitrogen-removing rate decline.
If nitrification hinders the addition of material in below 80gm/L, to the direct nitrogen bacterium of aerobism or other heterotrophism
The influence of bacterium is few, and nitrogen-removing rate can be maintained well.
<Action effect>
The wastewater treatment equipment and method of wastewater treatment of first embodiment of the invention from the description above, are being adopted
In wastewater treatment with the direct nitrogen bacterium of aerobism, by and with suppress to carry out the nitrification of nitration reaction by nitrobacteria
Material is hindered, is changed so as to suppress ammoniacal nitrogen to nitrite nitrogen or nitric nitrogen, can efficiently carry out direct nitrogen
Change reaction and denitrogenate.Therefore, wastewater treatment is carried out even in open system, also can be effectively denitrogenated.
" second embodiment "
<Wastewater treatment equipment>
Fig. 2 is the schematic configuration diagram of the wastewater treatment equipment 2 of second embodiment of the present invention.
The wastewater treatment equipment 2 of this possess the raw water retention basin 18 for storing waste water, the treatment trough 11 to wastewater treatment, to
The first adding set 12 of the waste water addition direct nitrogen bacterium of aerobism, the second addition to waste water addition nitrification obstruction material
Device 13 and the processing water retention basin 14 for storing treated waste water (processing water).
(raw water retention basin)
Raw water retention basin 18 is the groove for temporarily storing waste water before treatment, is with by raw water water or raw water quality
Variation homogenization for the purpose of and set.
The second waste water stream 19 and the 3rd waste water stream road 21 are connected with raw water retention basin 18.Second waste water stream 19 is to use
In the stream for making the waste water from discharges such as factory, institution be flowed into raw water retention basin 18.On the other hand, the 3rd waste water stream road
21 be the stream for making the waste water (raw water) that raw water retention basin 18 is discharged be flowed into treatment trough 11.
In addition, in the raw water retention basin 18 of this, in order that raw water quality homogenizes and is provided with mixer 18a.
(treatment trough)
Except be connected with the 3rd waste water stream road 21 replace the first waste water stream 15 in addition to, the treatment trough 11 of present embodiment with
The treatment trough 11 of first embodiment is identical.
(the first adding set)
First adding set 12 of present embodiment is identical with the first adding set 12 of first embodiment.
(the second adding set)
In addition to the waste water addition nitrification to raw water retention basin 18 hinders material, the second adding set of present embodiment
13 is identical with the second adding set 13 of first embodiment.
(processing water retention basin)
The processing water retention basin 14 of present embodiment is identical with the processing water retention basin 14 of first embodiment.
<Method of wastewater treatment>
In the method for wastewater treatment for employing the wastewater treatment equipment 2 shown in Fig. 2, make first from factory, institution
The waste water of discharge is flowed into raw water retention basin 18 and stored by the second waste water stream 19.Then, into raw water retention basin 18
Waste water hinder material (second addition process) from the second adding set 13 addition nitrification, stir waste water with mixer 18a.Connect
, make to hinder the waste water of material to flow into treatment trough 11 by the 3rd waste water stream road 21 from raw water retention basin 18 added with nitrification.
Then, the direct nitrogen bacterium of waste water addition aerobism (the first addition work from the first adding set 12 into treatment trough 11
Sequence).The aerator 17 in treatment trough 11 is worked, aerobic condition will be maintained in groove, carry out biological wastewater processing.In
It is that the ammoniacal nitrogen in waste water removes denitrification by the direct nitrogen bacterium nitrogen of aerobism from waste water.Further, when containing in waste water
During organic nitrogen, organic nitrogen is converted into after ammoniacal nitrogen as described above by the effect of microorganism, straight by aerobism
Connect nitrogen bacterium nitrogen.
Processed waste water is supplied to processing water retention basin 14 as processing water from treatment trough 11 by handling current road 16
And stored.
The addition of the direct nitrogen bacterium of aerobism and nitrification hinder the addition and first embodiment of material
Method of wastewater treatment is identical.
<Action effect>
The wastewater treatment equipment and method of wastewater treatment of second embodiment of the present invention from the description above, are being adopted
In wastewater treatment with the direct nitrogen bacterium of aerobism, by and with suppress to carry out the nitrification of nitration reaction by nitrobacteria
Material is hindered, is changed so as to suppress ammoniacal nitrogen to nitrite nitrogen or nitric nitrogen, can efficiently carry out direct nitrogen
Change reaction and denitrogenate.Therefore, wastewater treatment is carried out even in open system, also can be effectively denitrogenated.In addition, second is real
In the wastewater treatment equipment and method of wastewater treatment of applying mode, waste water is temporarily held in raw water retention basin before treatment,
But because the waste water addition nitrification into raw water retention basin hinders material, therefore carried out even in open system in raw water retention basin
Wastewater retentive, can also suppress ammoniacal nitrogen and be changed to nitrite nitrogen or nitric nitrogen.
" other embodiment "
The wastewater treatment equipment and method of wastewater treatment of the present invention is not limited by above-mentioned embodiment.For example,
In first embodiment, the direct nitrogen bacterium of aerobism and nitrification hinder material to make an addition to the first waste water stream 15 of circulation
Waste water in, or by nitrifying material can also be hindered to be added in the waste water of the first waste water stream 15 of circulation, and by aerobism
Direct nitrogen bacterium is added in the waste water in treatment trough.In addition it is also possible to which the direct nitrogen bacterium of aerobism is added to
Circulate in the waste water of the first waste water stream 15, and hinder material to be added in the waste water in treatment trough nitrification.
In addition, in the first embodiment, raw water retention basin can also be set in the upstream for the treatment of trough 11.Simply, it is this
Situation carries out the wastewater retentive in raw water retention basin preferably in closed system.
In addition, in this second embodiment, nitrification hinders material to be added to the waste water of the second waste water stream 19 of circulation
In.The direct nitrogen bacterium of aerobism can be added in the waste water on the 3rd waste water stream road 21 of circulation, can also be added to raw water
In waste water in retention basin 18.
[embodiment]
Hereinafter, the present invention is further illustrated by embodiment, but the present invention is not limited by these examples.
" embodiment 1 "
The pure water nutrient solution of Bacillus foecalis alkaligenes is added in treatment trough as initial sludge, as described below in open body
Wastewater treatment is carried out in system.Moreover, it is assumed that the presence ratio of No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814) is due to miscellaneous bacteria
Be mixed into etc. and as 50% situation.
First, to Bacillus foecalis alkaligenes No.4 plants (FERM P-21814) nutrient solution, with thalline dry weight densimeter into
Thallus suspension liquid is prepared for 2000mg/L.
In addition, the standard activated sludge equipment from processing sanitary wastewater takes standard activated sludge, with dry weight concentration
Meter prepares sludge suspension liquid with turning into 2000mg/L.
The thallus suspension liquid and each 100mL of sludge suspension liquid are put into respectively simultaneously to the conical flask of 1000mL volumes
Mixing, obtains suspension mixed solution.
To obtained suspension mixed solution, the ammonium sulfate and sodium acetate as ammoniacal nitrogen are added, so that ammonium sulfate turns into
500mg/L, sodium acetate turn into 3000gm/L, and further using sulfuric acid solution or sodium hydroxide solution pH is adjusted to 6.8~
7.2 scope.
Then, the allylthiourea of material is hindered to become as nitrification the suspension mixed solution addition after adjustment pH
0.1mg/L, shaken cultivation (hunting speed 120rpm) is carried out at 25 DEG C.
Suspension mixed solution just is taken after (initial stage) and 24 hours after culture, is filtered with 0.45 μm of disc filter, is collected
Filtered fluid, determines total nitrogen concentration and total organic concentration of carbon, tries to achieve total nitrogen-removing rate by following formula (1), pass through as described below
Following formula (2) tries to achieve total organic except carbon rate.In addition, the nitric nitrogen as described below in filtered fluid of the measure after 48 hours is dense
Degree.These results are shown in table 1.
The total nitrogen concentration at total nitrogen-removing rate (%)=(total nitrogen concentration of the total nitrogen concentration at initial stage after -24 hours)/initial stage ×
100…(1)
Total organic except carbon rate (%)=(total organic concentration of carbon of the total organic concentration of carbon at initial stage after -24 hours)/
Total organic concentration of carbon × 100 ... (2) at initial stage
In addition, determining the knot of the total organic concentration of carbon (the total organic concentration of carbon at initial stage) of sodium acetate 3000mg/L solution
Fruit is that total organic concentration of carbon is 870mg/L.
(measure of total organic concentration of carbon)
Total organic concentration of carbon uses total organic carbon analytical equipment (Mitsubishi Chemical Analytech
Co., Ltd.'s system, " TOC-3000V ") it is measured.The mensuration mode of the present apparatus is set to combustion catalyst oxidation/NFDIR detections.
(measure of total nitrogen concentration)
Use the Nitrogen detector (Mitsubishi for being connected to described total organic carbon analytical equipment " TOC-3000V "
Chemical Analytech Co., Ltd.s system, " ND-210 types ") determine total nitrogen concentration.The assay method of the present apparatus is set to oxygen
Change decomposition-chemoluminescence method (decompression method).
(measure of nitric nitrogen concentration)
Nitric nitrogen concentration is determined using Simple water analytical equipment (HACH company systems, " DR-2700 ").Tried as measure
Agent, has used nitrate to determine reagent パ ウ ダ ー ピ ロ ー Nitra Ver5 (Cat.No21061-69).
" embodiment 2~7, comparative example 1 "
In addition to the addition of allylthiourea is changed as shown in table 1, implement to be given up similarly to Example 1
Water process, determines total nitrogen-removing rate, total organic and removes carbon rate and nitric nitrogen concentration.As a result represented in table 1.
" embodiment 8~14, comparative example 2 "
Except hindering inhibitor (Mitsubishi Rayon Co., Ltd's system, " ノ Application ラ イ ザ ー (NONRISER) ") to make using nitrification
Material is hindered for nitrification, and beyond ノ Application ラ イ ザ ー addition is changed as shown in table 2, similarly to Example 1
Implement to carry out wastewater treatment, determine total nitrogen-removing rate, total organic and remove carbon rate and nitric nitrogen concentration.As a result represented in table 2.
In addition, it is 95 mass %'s to contain in the result calculated from TOC assay values, ノ Application ラ イ ザ ー relative to gross mass
1- amidino groups -2- the thiocarbamides of material are hindered as nitrification.
[table 1]
[table 2]
Embodiment 1~7 is compared with comparative example 1, and total nitrogen-removing rate is high.In addition, the nitric acid state in filtered fluid after 48 hours
Nitrogen concentration is low, and the nitrification of ammonia is suppressed.Especially, the embodiment 2~7 of more than 0.5gm/L allylthiourea is with the addition of, is always denitrogenated
Rate is higher, and nitric nitrogen concentration is lower.
Embodiment 8~14 is compared with comparative example 2, and total nitrogen-removing rate is high.In addition, the nitric acid state in filtered fluid after 48 hours
Nitrogen concentration is low, and the nitrification of ammonia is suppressed.Especially, more than 0.5gm/L ノ Application ラ イ ザ ー embodiment 9~14 is with the addition of, always
Nitrogen-removing rate is higher, and nitric nitrogen concentration is lower.
Claims (16)
1. it is to use the direct nitrogen bacterium of aerobism a kind of wastewater treatment equipment, to containing organic nitrogen and ammoniacal nitrogen
The device that the waste water of at least one is handled, it is characterised in that
The wastewater treatment equipment possesses：
The treatment trough handled the waste water,
The first adding set of the direct nitrogen bacterium of aerobism is added to the waste water, and
The second adding set that nitrification hinders material is added to the waste water.
2. wastewater treatment equipment according to claim 1, is further equipped with storing described give up in the upstream of the treatment trough
The raw water retention basin of water.
3. wastewater treatment equipment according to claim 1, first adding set is the waste water addition into treatment trough
The device of the direct nitrogen bacterium of aerobism, second adding set is that the waste water addition nitrification into treatment trough hinders material
Device.
4. wastewater treatment equipment according to claim 2, first adding set is the waste water addition into treatment trough
The device of the direct nitrogen bacterium of aerobism, second adding set is that the waste water addition nitrification into raw water retention basin hinders
The device of material.
5. the wastewater treatment equipment according to any one of Claims 1 to 4, the direct nitrogen bacterium of aerobism is
No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814).
6. the wastewater treatment equipment according to any one of Claims 1 to 5, the nitrification hinder material to be selected from by sulphur
The chloro- 6- methylpyrimidines of urea, allylthiourea, 2- amino -4-, 2-mercaptobenzothiazole, dicyanodiamine, sulphathiazole, 1- amidino groups -
2- thiocarbamides, N-2,5- dichlorophenyls succinamic acid, 4- amino -1,2,4- triazoles hydrochloride, 3- sulfydryl -1,2,4- triazoles composition
Group in more than a kind.
7. wastewater treatment equipment according to claim 6, the nitrification hinder material to be selected from by thiocarbamide, allyl sulfide
More than a kind in urea, the group of 1- amidino groups -2- thiocarbamides composition.
8. a kind of method of wastewater treatment, be using the direct nitrogen bacterium of aerobism to containing organic nitrogen and ammoniacal nitrogen extremely
The method that the waste water of few one is handled, it is characterised in that
The method of wastewater treatment has：
The first addition process of the direct nitrogen bacterium of aerobism is added to the waste water, and
The second addition process that nitrification hinders material is added to the waste water.
9. method of wastewater treatment according to claim 8, by the wastewater retentive of before processing in raw water retention basin.
10. method of wastewater treatment according to claim 8, the first addition process is the waste water addition into treatment trough
The process of the direct nitrogen bacterium of aerobism, the second addition process is that the waste water addition nitrification into treatment trough hinders material
Process.
11. method of wastewater treatment according to claim 9, the first addition process is the waste water addition into treatment trough
The process of the direct nitrogen bacterium of aerobism, the second addition process is that the waste water addition nitrification into raw water retention basin hinders
The process of material.
12. the method for wastewater treatment according to any one of claim 8~11, adds 0.3~80mg's to 1L waste water
Nitrification hinders material.
13. method of wastewater treatment according to claim 12, the nitrification that 0.75~55mg is added to 1L waste water hinders material.
14. the method for wastewater treatment according to any one of claim 8~13, the direct nitrogen bacterium of aerobism
It is No.4 plants of Bacillus foecalis alkaligenes (FERM P-21814).
15. the method for wastewater treatment according to any one of claim 8~14, the nitrification hinder material be selected from by
The chloro- 6- methylpyrimidines of thiocarbamide, allylthiourea, 2- amino -4-, 2-mercaptobenzothiazole, dicyanodiamine, sulphathiazole, 1- amidines
Base -2- thiocarbamides, N-2,5- dichlorophenyls succinamic acid, 4- amino -1,2,4- triazoles hydrochloride, 3- sulfydryl -1,2,4- triazoles
One or more of group of composition.
16. method of wastewater treatment according to claim 15, the nitrification hinder material to be selected from by thiocarbamide, allyl sulfide
More than a kind in urea, the group of 1- amidino groups -2- thiocarbamides composition.
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| JP2016238484A JP6801415B2 (en) | 2016-02-05 | 2016-12-08 | Wastewater treatment equipment and wastewater treatment method |
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Cited By (1)
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| CN111115784A (en) * | 2020-01-10 | 2020-05-08 | 杨琼 | Degradation agent for degrading nitrite in aquaculture water by using compound nitrification inhibitor and preparation method thereof |
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