CN106315848B - A kind of method and its application using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore - Google Patents
A kind of method and its application using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore Download PDFInfo
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- CN106315848B CN106315848B CN201611012006.6A CN201611012006A CN106315848B CN 106315848 B CN106315848 B CN 106315848B CN 201611012006 A CN201611012006 A CN 201611012006A CN 106315848 B CN106315848 B CN 106315848B
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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
- C02F3/28—Anaerobic digestion 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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Abstract
The invention discloses a kind of method and its application using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore, belong to water resource purification techniques field.The present invention includes (a) material preparation: natural magnetic iron ore is broken into particle, is rinsed with water after pickling to neutral (b) bacterial screening: being screened from anaerobic sludge using specific screening and culturing medium using natural magnetic iron ore is the sulphur autotrophic denitrification bacterium of sulphur source as target strain；(c) sewage treatment: taking the underground water containing nitrate and arsenic, and vaccination target strain, which is placed in the reactor containing natural magnetic iron ore, to be reacted；(d) it is separated by solid-liquid separation.Sulphur source of the present invention using natural magnetic iron ore as sulphur autotrophic denitrification bacterium carries out denitrification, converts nitrogen for the nitrate reduction in water；Magnetic iron ore and its oxidation product can remove the arsenic in water removal using the effects of chemical precipitation and absorption, remove to realize to the synchronous high-efficiency of nitrate in groundwater and arsenic.This method operation is convenient, low in cost.
Description
Technical field
The invention belongs to water resource purification techniques fields, more specifically to a kind of synchronous using natural magnetic iron ore
Remove the method and its application of nitrate in groundwater and arsenic.
Background technique
Agriculture a large amount of nitrogen application will cause the large-scale nitrate of underground water and arsenic plus special geologic(al) factor
Combined pollution causes huge threat to local resident's safe drinking water.The combined pollution of groundwater azotate and arsenic is in China
Be particularly acute, according to pertinent literature, in the underground water in the cities such as Tianjin, Harbin, Xi'an, Changchun generally existing nitrate and
The pollution of arsenic.Currently, all carried out respectively to the removal of nitrate in water and arsenic, there has been no while maturation to nitrate and
The method of arsenic removal, two kinds of pollutants of processing, which can not only increase significantly cost, respectively can also make process flow become cumbersome, so
Effectively, inexpensively, easily technology is the Main way of current processing nitrate in groundwater and arsenic pollution research.
The minimizing technology of nitrate in groundwater is divided into physical method, chemical method and bioanalysis, and physical method and chemical method are thrown
Money and operation cost are all very high, for huge groundwater treatment amount, using by biggish limitation；Biological heterotrophic denitrification is de-
Nitrogen technology, although treatment effect is preferable, being faced with underground water carbon source deficiency needs cost caused by additional carbon to increase, and is easily formed
Secondary pollution problems.Underground water arsenic removal process mainly has coagulant sedimentation, ion-exchange, bioanalysis, membrane separation process and suction
Attached method etc., and in view of reasons such as cost of investment and technical stabilities, it is applied in industrial production and processing Drinking Water at present
Most extensive mature dearsenicating method or coagulant sedimentation.
Sulphur autotrophic denitrification bacterium is generally existing in the anaerobic environments such as underground water and deposit, it can be under anaerobic
With reduced sulfur (S2-、S0、S2O3 2-Deng) it is electron donor, autotrophic denitrification is carried out using nitrate as electron acceptor, it will be in water
Nitrate reduction is nitrogen.Sulphur autotrophic denitrification bacterium can be with natural magnetic iron ore (Fe(1-X)S) the anti-nitre of autotrophy is carried out for sulphur source
Change removal nitrate, but yet there are no report currently with the research of the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore
Road.
Chinese patent " utilizing the method for arsenic and nitrate in anaerobic ferrite oxidization, denitrifying bacterium purification sewage " (patent application
Number: 201310070136.5) disclose the method for synchronizing arsenic and nitrate in water removal using anaerobic ferrite oxidization, denitrifying bacterium.
This method is using iron oxidation denitrifying bacterium with Fe2+Denitrification, the Fe of generation are carried out for electron donor3+The adsorbable arsenic of oxide
Characteristic achievees the purpose that simultaneous denitrification arsenic removal.But the removal rate of this method nitrogen arsenic is unsatisfactory, in Fe2+It is anti-under the conditions of adequately
30d is answered, there was only 30%-70% and 40%-70% to the removal efficiency of nitrate and arsenic；In addition it reacts all occurring at solution
In, it is difficult to continuous operation and bacterium solution separation；Additional carbon is needed, it is exceeded to be likely to result in out water pollutant；Practicability is poor.
Summary of the invention
1. to solve the problems, such as
For the Groundwater Treatment Methodss of existing nitrate and arsenic combined pollution, that there are step-by-step processings is with high costs, technique is multiple
Miscellaneous, the problems such as treatment effect is undesirable, an object of the present invention is to provide a kind of synchronous removably using natural magnetic iron ore
The method for being lauched middle nitrate and arsenic, sulphur autotrophic denitrification bacterium carry out denitrification as sulphur source using natural magnetic iron ore and go to remove water
In nitrate；The biooxidation products Fe of magnetic iron ore2+、Fe3+The arsenic in water removal can be removed by precipitation.
2. technical solution
To solve the above-mentioned problems, the technical solution adopted in the present invention is as follows:
A method of utilizing the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic, comprising the following steps:
(a) material prepares: magnetic iron ore being broken into particle, is rinsed with water again after pickling to pH and is in neutrality to remove mineral
The oxide on surface and other pollutants, it is spare；
(b) it bacterial screening: is filtered out from anaerobic sludge using specific screening and culturing medium using natural magnetic iron ore as sulphur
The sulphur autotrophic denitrification bacterium in source is as target strain；
(c) sewage treatment: the underground water containing nitrate and arsenic is taken, vaccination target strain is placed in reactor, then is added
It is sufficiently reacted after a certain amount of magnetic iron ore concussion；
(d) it is separated by solid-liquid separation: the mixed liquor after reaction is staticly settled, discharge after supernatant detection is up to standard.
Further, magnetic iron ore used in step (a) be natural magnetic iron ore, be crushed partial size 0.1-20mm it
Between.
Further, screening is trained by the screening of the sulphur autotrophic denitrification bacterium of sulphur source of natural magnetic iron ore in step (b)
The main component and concentration for supporting base are respectively NaS2O3·5H2O 5g/L、KNO3 2g/L、KH2PO4 2g/L、NaHCO3 1g/L、
MgCl2·6H2O 0.5g/L、NH4Cl 0.5g/L、FeSO4·7H2O 0.01g/L。
Further, the inoculum concentration of target strain is the 5~10% for the treatment of sewage volume in step (c).
Further, the dosage of magnetic iron ore is 100~250g/L in step (c), that is, after adding magnetic iron ore, instead
The concentration for answering the magnetic iron ore in system is 100~250g/L.
Further, the optimal reactive temperature in step (c) is 15~30 DEG C.
Further, the reaction time in step (c) is 5~15d.
Further, the reaction pH range in step (c) is between 6~8.
A kind of above-mentioned method using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic is net in underground water
Application in change field.
The principle of the present invention is: sulphur autotrophic denitrification bacterium carries out denitrification as sulphur source using natural magnetic iron ore and goes to remove water
In nitrate；The biooxidation products Fe of magnetic iron ore2+、Fe3+The arsenic in water removal, Fe can be removed by precipitation2+、Fe3+
Hydroxide be such as in amorphous state Fe (OH)3Also there is very strong Adsorption effect to arsenic；Finally realize biological denitrificaion
With the natural coupling of Removal of arsenic by chemical method, wherein sulphur autotrophic denitrification bacterium carries out the equation of autotrophic denitrification reaction using magnetic iron ore
It is as follows:
3. beneficial effect
Compared with the prior art, the invention has the benefit that
(1) the present invention provides a kind of method using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore,
Sulphur autotrophic denitrification bacterium aoxidizes the Fe (OH) for the amorphous state that magnetic iron ore generates3There is very strong Adsorption effect to arsenic, far
Better than magnetic iron ore itself or autoxidation to the removal effect of arsenic, realize to low ratio of carbon to ammonium underground water biological denitrificaion and chemistry
The natural coupling of arsenic removal；
(2) present invention realizes removal synchronous with arsenic to nitrate in groundwater, applied widely, processing speed fastly,
Removal efficiency is high and does not have to additional carbon；
(3) present invention uses natural magnetic iron ore from a wealth of sources, discarded after cheap or many minings
Ore, is easy to produce acidic mine waste water, and the natural crystal resource utilization that the present invention will be discarded, play resource reclaim and
The effect of avoiding pollution；
(4) target strain itself growth rate that the present invention screens is fast, and suitable growth temperature is extensive, adheres to natural magnetic Huang iron
In mine in water nitrate and arsenic be removed when, denitrification rate is fast, is not necessarily to added regent, bacterium solution good separating effect, can
It is extensive with continuous operation, applicable elements；
(5) underground water is at low cost, high treating effect for present invention processing, is easy to be engineered application.
Detailed description of the invention
Fig. 1 is the effect that the arsenic removal of artificial distribution's simultaneous denitrification is handled in the embodiment of the present invention 1；
Fig. 2 is the effect that the arsenic removal of artificial distribution's simultaneous denitrification is handled in the embodiment of the present invention 2；
Fig. 3 is the effect that the arsenic removal of artificial distribution's simultaneous denitrification is handled in the embodiment of the present invention 3；
Fig. 4 is the effect that certain city's underground water simultaneous denitrification arsenic removal is handled in the embodiment of the present invention 4.
Specific embodiment
The present invention is further described below combined with specific embodiments below.
Embodiment 1
A method of using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic, process object is by certainly
The artificial distribution that water, potassium nitrate, potassium dihydrogen phosphate are formulated, the steps include:
(a) material prepares: will originate from the natural magnetic iron ore that Tongling, Anhui Province iron sulfur content is respectively 58% and 39% and is crushed
To 80~100 mesh, again with the pH value of distilled water flushing to water outlet between 6~8 after pickling, then in 30 DEG C of vacuum oven
Inside it is dried for standby；
(b) it bacterial screening: is screened from Nanjing Yangzi petrifaction sewage factory UASB technique anaerobic sludge using screening and culturing medium
Sulphur autotrophic denitrification bacterium is as target strain；The main component and concentration of screening and culturing medium are respectively NaS2O3·5H2O 5g/L、
KNO3 2g/L、KH2PO4 2g/L、NaHCO3 1g/L、MgCl2·6H2O 0.5g/L、NH4Cl 0.5g/L、FeSO4·7H2O
0.01g/L。
(c) sewage treatment: taking the initial concentration of nitrate nitrogen and arsenic is respectively the water distribution of 34.9mg/L, 27.3mg/L, is connect
The target strain of 7% (v/v) of kind is in reactor, then adds after the natural magnetic iron ore that concentration is 230g/L shakes at 27 DEG C
React 13d；For the reactor used in the present embodiment for similar sequencing batch reactor, anaerobic environment is more preferable, is more conducive to anaerobism
Sulphur autotrophic denitrification bacterium growth；
(d) be separated by solid-liquid separation: the mixed liquor after reaction is staticly settled, supernatant detection it is up to standard after discharge, nitrate nitrogen and
The removal effect of arsenic as shown in Figure 1, after reaction 13d the aqueous concentration of nitrate nitrogen and arsenic be respectively 0.725mg/L and
0.006mg/L, treatment effeciency are respectively 97.95% and 99.99%.
The method provided in the present embodiment is very good to the removal effect of nitrate and arsenic in underground water, with comparison patent
201310070136.5 compare, and have removal rate high, and reaction time short advantage, this is primarily due to the target that the present invention screens
Strain growth rate itself is fast, and suitable growth temperature is extensive, adhere on natural magnetic iron ore in water nitrate and arsenic carry out
When removal, denitrification rate is fast, is not necessarily to added regent, bacterium solution good separating effect, can be with continuous operation.The present invention and comparison patent
201310695460.6 compare, and there are following differences: (1) object handled is different, and comparison patent processing is sewage, this hair
Daylight reason is underground water, and the nature difference of the two is huge；(2) type of reactor is different, and the reactor that the present invention uses is similar
Sequencing batch reactor, unlike filter tank needs to backwash, anaerobic environment is more preferable, and the sulphur autotrophic denitrification bacterium for being more conducive to anaerobism is raw
It is long；(3) reaction mechanism is also not quite similar, although being required to using the bacterium denitrogenation of sulphur autotrophic denitrification, for going for arsenic and phosphorus
Except mechanism is different, increasingly complex chemical reaction occurs during being mainly shown as magnetic iron ore arsenic-adsorbing and (forms class
Like the compound of mispickel), absorption is close not easily to fall off, and mainly based on physics, when backwash is easy to discharge for the absorption of phosphorus.
Inventor also found the Fe (OH) for the amorphous state that sulphur autotrophic denitrification bacterium oxidation magnetic iron ore generates in an experiment3Also have to arsenic
Very strong Adsorption effect is much better than magnetic iron ore itself or autoxidation to the removal effect of arsenic.
Embodiment 2
A method of using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic, process object is by certainly
The artificial distribution that water, potassium nitrate, potassium dihydrogen phosphate are formulated, the steps include:
(a) material prepares: will originate from the natural magnetic iron ore that Tongling, Anhui Province iron sulfur content is respectively 58% and 39% and is crushed
It is dried for standby in 30 DEG C of vacuum oven to 5~20 mesh again with distilled water flushing to pH between 6~8 after pickling；
(b) it bacterial screening: is screened from Nanjing Yangzi petrifaction sewage factory UASB technique anaerobic sludge using screening and culturing medium
Sulphur autotrophic denitrification bacterium is as target strain；The main component and concentration of screening and culturing medium are respectively NaS2O3·5H2O 5g/L、
KNO3 2g/L、KH2PO4 2g/L、NaHCO3 1g/L、MgCl2·6H2O 0.5g/L、NH4Cl 0.5g/L、FeSO4·7H2O
0.01g/L。
(c) sewage treatment: taking the initial concentration of nitrate nitrogen and arsenic is respectively the water distribution of 34.7mg/L, 2.2mg/L, inoculation
The target strain of 8% (v/v) is in reactor, then adds anti-at 32 DEG C after the natural magnetic iron ore that concentration is 240g/L shakes
Answer 15d；
(d) be separated by solid-liquid separation: the mixed liquor after reaction is staticly settled, supernatant detection it is up to standard after discharge, nitrate nitrogen and
The removal effect of arsenic is as shown in Fig. 2, water outlet nitrate nitrogen concentration is 5.31mg/L, treatment effeciency 84.7%；It is discharged arsenic concentration
For 0.005mg/L, treatment effeciency 99.77%.
Embodiment 3
A method of using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic, process object is by certainly
Water, potassium nitrate, the artificial distribution that potassium dihydrogen phosphate is formulated the steps include:
(a) material prepares: will originate from the natural magnetic iron ore that Tongling, Anhui Province iron sulfur content is respectively 58% and 39% and is crushed
It is dried for standby in 30 DEG C of vacuum oven to 100~150 mesh again with distilled water flushing to pH between 6~8 after pickling；
(b) it bacterial screening: is sieved from Nanjing Yangzi petrifaction sewage factory UASB technique anaerobic sludge using main screening and culturing medium
Select sulphur autotrophic denitrification bacterium as target strain；
(c) sewage treatment: taking the initial concentration of nitrate nitrogen and arsenic is respectively the water distribution of 21.1mg/L, 27.3mg/L, is connect
The target strain of 9% (v/v) of kind is in reactor, then adds after the natural magnetic iron ore that concentration is 220g/L shakes at 25 DEG C
React 13d；
(d) be separated by solid-liquid separation: the mixed liquor after reaction is staticly settled, supernatant detection it is up to standard after discharge, nitrate nitrogen and
The removal effect of arsenic is as shown in figure 3, water outlet nitrate nitrogen concentration is 0.16mg/L, treatment effeciency 99.24% after reaction；Water outlet
Arsenic concentration is 0.007mg/L, treatment effeciency 99.97%.
Embodiment 4
A method of using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic, process object is simultaneously
By the Shaanxi city underground water of nitrate and arsenic pollution, the steps include:
(a) material prepares: will originate from the natural magnetic iron ore that Tongling, Anhui Province iron sulfur content is respectively 58% and 39% and is crushed
It is dried for standby in 30 DEG C of vacuum oven to 100-150 mesh again with distilled water flushing to pH between 6-8 after pickling；
(b) it bacterial screening: is screened from Nanjing Yangzi petrifaction sewage factory UASB technique anaerobic sludge using screening and culturing medium
Sulphur autotrophic denitrification bacterium is as target strain；
(c) sewage treatment: taking while by certain of nitrate and arsenic pollution city underground water, is inoculated with the object bacteria of 10% (v/v)
Kind reacts 13d at 28 DEG C in reactor, then after adding the natural magnetic iron ore concussion that concentration is 250g/L；
(d) be separated by solid-liquid separation: the mixed liquor after reaction is staticly settled, supernatant detection it is up to standard after discharge, nitrate nitrogen and
The removal effect of arsenic is as shown in figure 4, water outlet nitrate nitrogen concentration is 0.13mg/L, treatment effeciency 99.56%；It is discharged arsenic concentration
For 0.008mg/L, treatment effeciency 99.96%.
Claims (9)
1. a kind of method using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore, comprising the following steps:
(a) material prepares: natural magnetic iron ore is broken into particle, is rinsed with water to pH and is in neutrality again after pickling, it is spare；
(b) bacterial screening: being filtered out from anaerobic sludge using natural magnetic iron ore is the sulphur autotrophic denitrification bacterium of sulphur source as mesh
Mark strain；
(c) sewage treatment: taking the underground water containing nitrate and arsenic, and vaccination target strain is placed in reactor, then adds certain
It is sufficiently reacted after the natural magnetic iron ore concussion of amount；
(d) it is separated by solid-liquid separation: the mixed liquor after reaction is staticly settled, discharge after supernatant detection is up to standard.
2. a kind of side using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore according to claim 1
Method, it is characterised in that: natural magnetic iron ore used in step (a) is crushed partial size between 0.1-20mm.
3. according to claim 1 or 2 a kind of using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic
Method, it is characterised in that: screening is using natural magnetic iron ore as the screening and culturing medium of the sulphur autotrophic denitrification bacterium of sulphur source in step (b)
Main component and concentration be respectively NaS2O3·5H2O 5g/L、KNO3 2g/L、KH2PO4 2g/L、NaHCO3 1g/L、
MgCl2·6H2O 0.5g/L、NH4Cl 0.5g/L、FeSO4·7H2O 0.01g/L。
4. a kind of side using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore according to claim 1
Method, it is characterised in that: the inoculum concentration of target strain is the 5~10% for the treatment of sewage volume in step (c).
5. according to claim 1 or 4 a kind of using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic
Method, it is characterised in that: the dosage of magnetic iron ore is 100~250g/L in step (c).
6. a kind of side using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore according to claim 5
Method, it is characterised in that: the reaction temperature in step (c) is 15~30 DEG C.
7. a kind of side using the synchronous removal nitrate in groundwater and arsenic of natural magnetic iron ore according to claim 6
Method, it is characterised in that: the reaction time in step (c) is 5~15d.
8. according to claim 1 or claim 7 a kind of using the synchronous removal nitrate in groundwater of natural magnetic iron ore and arsenic
Method, it is characterised in that: the reaction pH range in step (c) is between 6~8.
9. a kind of described in claim 1 existed using the synchronous method for removing nitrate in groundwater and arsenic of natural magnetic iron ore
Application in ground water cleaning field.
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| CN107304075B (en) * | 2017-07-06 | 2019-12-13 | 南京大学 | Wastewater treatment method for synchronously removing nitrogen, phosphorus and ammonia nitrogen |
| CN107555519A (en) * | 2017-09-27 | 2018-01-09 | 华南理工大学 | A kind of method of effectively processing Arsenic Contamination in Groundwater |
| CN111732205A (en) * | 2020-06-28 | 2020-10-02 | 河南工业大学 | Method for removing antimonate in water by using microorganism sulfur autotrophy and sulfur disproportionation reaction |
| CN115246666B (en) * | 2022-06-02 | 2023-10-27 | 四川师范大学 | Method for removing nitrate nitrogen in water by using pyrite |
| CN115180716B (en) * | 2022-07-12 | 2024-02-23 | 华辰环保能源(广州)有限责任公司 | Sulfur circulation-based arsenic-containing wastewater treatment method |
| CN115231700A (en) * | 2022-07-27 | 2022-10-25 | 北京林业大学 | Method for synchronously removing nitrogen and phosphorus from low C/N sewage based on sulfur autotrophic denitrification and sulfate reduction coupling system |
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| CN103121758A (en) * | 2013-03-05 | 2013-05-29 | 中国科学院新疆生态与地理研究所 | Method for purifying arsenic and nitrate in sewage by anaerobic ferrite oxidization and denitrifying bacteria |
| CN103626293A (en) * | 2013-12-17 | 2014-03-12 | 南京大学 | Natural pyrrhotite biological filter and method for synchronously removing nitrate nitrogen and phosphorus out of water by using natural pyrrhotite biological filter |
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| JP2010088991A (en) * | 2008-10-07 | 2010-04-22 | Waseda Univ | Water treatment agent and water treatment method |
| CN103121758A (en) * | 2013-03-05 | 2013-05-29 | 中国科学院新疆生态与地理研究所 | Method for purifying arsenic and nitrate in sewage by anaerobic ferrite oxidization and denitrifying bacteria |
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