CN106396098A - Synchronous nitrogen removal and sulfur removal method for high salinity wastewater - Google Patents
Synchronous nitrogen removal and sulfur removal method for high salinity wastewater Download PDFInfo
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- 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
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- C02F3/00—Biological treatment of water, waste water, or sewage
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- C02F2101/00—Nature of the contaminant
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- C02F2101/166—Nitrites
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Abstract
The invention provides a synchronous nitrogen removal and sulfur removal method for high salinity wastewater. According to the method, synchronous removal of S<2->, NO2<-> and NH4<+> in the wastewater is realized by using a synergistic effect of salt-tolerant facultative sulfur removal denitrifying microorganisms and salt-tolerant anaerobic ammonia-oxidizing microorganisms, and elemental sulfur is accumulated, so that the method has the characteristics of simple technology, convenience in operation, little surplus sludge, and no intermediate metabolites such as N2O, and also has better pretreatment technology matching performance and higher nitrite removal capacity, the elemental sulfur can be recycled, and waste recycling is realized.
Description
Technical field
The invention belongs to technical field of waste water processing, it is related to a kind of method of high-salt wastewater simultaneous denitrification sulphur removal.
Background technology
The industries such as China's oil, chemical industry, weaving, pharmacy discharge a large amount of high salt sulfur-bearing nitrogenous effluents every year, and such waste water is not
Only there is the dual harm of sulfur, nitrogen pollutant simultaneously, not only cause the problems such as body eutrophication, stench after entering water body, high
The presence of salinity also can aggravate the impact to environment, bring new difficulty to the process of such waste water simultaneously.Seek such useless
The cost-effective treatment technology of water is always the focus of environment in recent years engineering circles very concern.
Biologic treating technique is because having the prominent superioritys such as low, the simple to operate, convenient management of operating cost, and becomes waste water
The prevailing technology administered.However, traditional sulfur, nitrogen removal technology, sulfate and ammonia remove respectively, that is, adopt SO4 2-→S2-→
S0Step removes removing sulfate, using NH4 +→NO3 -(NO2 -)→N2Step removes ammonia.Denitrogenation and sulphur removal are typically in different reactor
Complete, make sulfur-bearing nitrogenous effluent treatment process system complicated, construction costs and operating cost are expensive, also can remain after sometimes processing
Sulfide secondary pollution, Environmental security hidden danger is extremely serious.By comparison, the sulfur autotrophic denitrification-anaerobism ammonia developing in recent years
Oxidation coupling denitrification and desulfurization process, using the synergism of sulfur autotrophic denitrification microorganism and anaerobic ammonia oxidation microbiological, can
S is removed in a reactor2-、NO3 -And NH4 +, utilize sulfur autotrophic denitrification antibacterial under anaerobic, by nitrate also
Originally it was nitrite, sulfide-oxidation is elemental sulfur simultaneously；Afterwards nitrite and ammonia in the presence of anaerobic ammonia oxidizing bacteria from
Foster denitrogenation, generates nitrogen.Have the advantages that treatment effeciency is high, simple to operate, water outlet non-secondary pollution, recyclable elemental sulfur, knot
Close sulfate reduction and nitrification pretreating process, be capable of the process of low-carbon high-nitrogen sulfate-containing wastewater, nitrogenous useless in sulfur-bearing
Water process has potential using value.
However, the existing report coupling denitrification and desulfurization process with regard to sulfur autotrophic denitrification-Anammox mostly concentrates on
Non- saliferous (salinity<1%) field of wastewater, with regard to high-salt wastewater (salinity>1%) the crucial control condition of simultaneous denitrification sulphur removal
There is not been reported.Further, since high-salt wastewater easily realizes NO in nitrifying process2 -Accumulation, can remove S2-、NO3 -And NH4 +'s
Sulfur autotrophic denitrification-anaerobic ammonia oxidation process is difficult to matching.Therefore, if can develop same on existing Research foundation
Step removes S2-、NO2 -And NH4 +, and the high-salt wastewater handling process of accumulation elemental sulfur, can not only mate with pretreating process, also
New approaches can be provided for high salt sulfur-bearing nitrogenous effluent treatment.
CN104843863A discloses the wastewater treatment work that a kind of Anammox-sulfur autotrophic denitrification couples denitrification and desulfurization
Skill, based on the mixed training thing of anaerobic ammonia oxidizing bacteria-thiobacillus denitrificanss, in same reactor, temperature control is 25 for this technique
～35 DEG C, wastewater pH is adjusted to 7.5～8.0, hydraulic detention time be 2.5～10h, in described waste water ammonia in terms of N, nitrite with
N meter, concentration in terms of S for the sulfide are respectively 40～300mg L-1, 50～390mg L-1, 30～170mg L-1, and ammonia
Counted with N, the ratio of concentration that nitrite is counted with N is 1：1～1.32, the ratio of the concentration that sulfide is counted with S, ammonia is counted with N is 1:
1.54～1.74；Technique of the present invention is a kind of new treatment of wastes with processes of wastes against one another, the economical and efficient sewage disposal of simultaneous denitrification sulphur removal
Technology.Though this technique enables S2-、NO2 -And NH4 +Synchronization remove, but waste water handled by it be non-high-salt wastewater, the party in addition
In method, thiobacillus denitrificanss act as nitrate nitrogen produced by process anaerobic ammonia oxidizing bacteria metabolism, therefore, this technique nitrous acid
Salt removes limited efficacy, additionally, the presence of thiobacillus denitrificanss makes this technique capacity of resisting impact load be subject to a definite limitation.
Guo Qiong (stability of Anammox and its with autotrophy desulfurization denitrification coupling technique research, Hangzhou teacher in 2016
Model university Master's thesis) Anammox reported and sulfur autotrophic denitrification coupling technique, using isopyknic Anammox
Granule sludge is seed sludge with methane phase granule sludge, can synchronously remove NO2 -、NH4 +、S2-, and accumulation elemental sulfur, maximum nitrogen
Elimination capacity is 4.00kgN/ (m3D), maximum removal of sulphur load is 2.39kgS/ (m3D), influent ammonia nitrogen and sulfide ratio are
1.74, water inlet nitrite nitrogen is conducive to maintaining system stability, wherein Anammox for 2.20～2.27 with sulfide ratio
Bacterium and T.denitrificans are main dominant bacteria.
CN102923853A discloses a kind of wastewater treatment side of sulfur autotrophic denitrification-Anammox coupling desulfurization denitrogenation
Method, the method utilizes sulfur autotrophic denitrification antibacterial under anaerobic, and nitrate reduction is nitrite, sulfide oxygen simultaneously
Turn to elemental sulfur；Nitrite and ammonia nitrogen autotrophic denitrification in the presence of anaerobic ammonium oxidizing bacteria, generate nitrogen afterwards.Select
EGSB reactor, inoculation Heterotroph property granule methanogen or denitrifying bacterium, temperature control are between 25～35 DEG C.Progressively
Domestication has the anaerobic grain sludge of sulfur autotrophic denitrification and Anammox coupled characteristic, is opened with low COD concentration waste water first
Dynamic EGSB reactor；Afterwards, by with nitrite and ammonia nitrogen for water inlet, being first enriched with anaerobic ammonium oxidizing bacteria in the reactor；
In addition, with sulfide, nitrate and ammonia nitrogen for water inlet, progressively it is enriched with sulfur autotrophic denitrification bacterium, and by controlling the special sulfide of dimension
Ratio and nitrate nitrogen between is sulfur nitrogen mol ratio to guide response type, controls product to be sulphur simple substance and nitrite, with
Realization is coupled with Anammox.
Content of the invention
Based on this, the present invention proposes a kind of method of high-salt wastewater simultaneous denitrification sulphur removal, and the method can be anti-at one
Answer the S realizing in high-salt wastewater in device2-、NO2 -And NH4 +, and accumulation elemental sulfur, the method has high treating effect, operation operates
Simply, the advantages of recyclable elemental sulfur.
The present invention provides a kind of high-salt wastewater simultaneous denitrification process for sulfur removal, comprises the following steps：
(1) adopt UASB or EGSB reactor, with Sewage Plant second pond mud as seed sludge, with rich in S2-And NO2 -'s
Simulated wastewater is water inlet, adds NaHCO simultaneously3With acetate as organic carbon source, wherein NaHCO3Concentration in simulated wastewater
For 1-5g/L, in simulated wastewater, the Ratio control of acetate and sulfide concentration is 1:5～2:In the range of 1；In salinity it is
Under conditions of 2-5wt%, the mud rich in facultative desulfurization denitrifying microorganism for the domestication, treat S2-And NO2 -Clearance 90% with
On, complete to tame；Described simulated wastewater S2-With NO2 -- mol ratio be 1:2.4-2.8, pH value is 6-8.5；Described reactor
Temperature is 25-35 DEG C；
(2) using UASB or EGSB reactor, to be mixed with Sewage Plant second pond mud and sea outfall bed mud
Mixing sludge be seed sludge, the volume ratio of described Sewage Plant second pond mud and sea outfall bed mud is 1:0.8～
1.2, with rich in NH4 +And NO2 -Simulated wastewater be water inlet, add NaHCO simultaneously3, described NaHCO3Dense in simulated wastewater
Spend for 1-5g/L, under conditions of salinity is for 2-5wt%, tames salt tolerant anaerobic ammonia oxidizing bacteria, treat NH4 +、NO2 -Clearance exists
More than 90%, complete to tame；Described simulated wastewater NH4 +With NO2 -Mol ratio be 1:1.2-1.4, pH value is 6-8.5；Described anti-
The temperature answering device is 25-35 DEG C；(3) by said two devices mud according to volume ratio be 1：0.8～1.5 to be inoculated in UASB or EGSB anti-
Answer in device, control temperature of reactor to be 20-35 DEG C, pH value 6-8.5, HRT are 2.5-10h, continue to run with 40-60 days, that is, complete
The synchronization of sulfide, nitrite and ammonia removes；Ammonia in wherein said waste water is in terms of N, nitrite concentration in terms of N, vulcanize
Concentration in terms of S for the thing is respectively 50～300mg/L, 200～1950mg/L, 50mg/L～500mg/L.
Preferably described Sewage Plant second pond mud comes from the sewage treatment plant of coastal city.Preferably described step (1) and
(2) salinity of simulated wastewater described in is 3.5wt%.
When salinity of intaking is 3.5%～5%, the mol ratio of ammonia and sulfide in water inlet is adjusted to 1:1.6-2.7,
The mol ratio of ammonia and nitrite is adjusted to 1:When salinity of intaking is 5%～8%, control ammonia is rubbed 4-6.7 with sulfide
That ratio is 1:1.6-2.7, ammonia and nitrite mole be not more than 1:4.
S in step (1) water2-、NO2 -Mol ratio be preferably 1:2.5-2.7, most preferably 1:2.6.NH in step (2) water4 +- N and NO2 -The mol ratio of N is preferably 1:1.3-1.4, most preferably 1:1.32.Step (3) when water inlet salinity be 3.5%～
When 5%, in water inlet, the mol ratio of ammonia and sulfide is preferably 1:2.0-2.5, most preferably 1:2.3；Water inlet ammonia and nitrite
Mol ratio be preferably 1:5-6.5, most preferably 1:6.0；When salinity of intaking is 5%～8%, preferably ammonia and sulfide
Mol ratio is 1:2.0-2.5, most preferably 1：2.2, mole preferably 0.1-0.25 of ammonia and nitrite, most preferably 0.2.
In the step (3) that sulfide, nitrite and ammonia synchronously remove, the clearance of sulfide, nitrite and ammonia divides
Do not reach 90%, 95% and more than 90%, and the sulfide removing mainly is existed with elemental sulfur form, elemental sulfur theoretical yield 90%
More than.
Mud in end of run reactor with salt tolerant facultative desulfurization denitrifying microorganism and salt tolerant anaerobic ammonia oxidizing bacteria is
Main；The facultative desulfurization denitrifying bacterium of preferably described salt tolerant is Marinobacter, Thiobacillus, Thauera,
One or more of Thioalkalispira；Preferably described salt tolerant anaerobic ammonia oxidizing bacteria is Scalindua.
The principle of the present invention is：The salt tolerant facultative desulfurization denitrifying microorganism being obtained by special domestication step is existed
Have the characteristics that under salt time-sharing environment that elemental sulfur cumulative percentage is high, capacity of resisting impact load is strong, contaminant removal capacity is strong, facultative desulfurization
Denitrifying microorganism can quickly in removal system sulfide, and be translated into elemental sulfur, thus avoiding sulfide pair
The inhibitory action of anaerobic ammonia oxidizing bacteria in system；Meanwhile, when salinity is 3.5%～5%, salt tolerant facultative desulfurization denitrification is micro-
Biological and salt tolerant anaerobic ammonia oxidation microbiological passes through synergism, realizes S2-、NO2 -And NH4 +Synchronization remove (formula 1～formula 3)；
Additionally, also there is (formula 4) in a small amount of side reaction.When salinity is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:
1.6-2.7, ammonia and nitrite mole be not more than 1:4, elemental sulfur accumulation is subject to S2-Scale effect with nitrite is little, that is,
Side reaction formula 4 does not occur, generating polynomial 1～formula 3.In the present invention, when salinity is 3.5%～5%, control sulfide and ammonia
The purpose of ratio is the Biomass controlling facultative desulfurization denitrifying bacterium and anaerobic ammonia oxidizing bacteria so as to symbiosis can be worked in coordination with.And
When salinity is 5%～8%, salt time-sharing environment can promote the collaborative symbiosis of the two, need not carry out sulfide and ammonia ratio controls.
Compared with existing simultaneous denitrification desulfurization process, the present invention realizes S under hypersaline environment2-、NO2 -And NH4 +Synchronization go
Remove, and accumulation elemental sulfur, there is more preferable pretreating process matching performance (NO2 -Removal) and higher nitrite removal
Ability (presence of formula 3)；Simultaneously compared with traditional denitrification and desulfurization process, there is process is simple, run easy to operate, remaining dirt
Mud is few, no N2The advantages of mesostates such as O are accumulated.Simultaneously by the simple substance sulfur recovery of sulfide-oxidation, it is capable of
Changing waste into resources.During process operation, S2-、NO2 -And NH4 +The clearance of-N is maintained at more than 90%, elemental sulfur conversion rate
More than 90%.
Heretofore described concentration is if not otherwise specified all referring to mass percent or mass concentration.
Brief description
Fig. 1 is the elemental sulfur optical photography figure in embodiment 1.
Specific embodiment
Technical solution of the present invention is not limited to act specific embodiment set forth below, also includes appointing between specific embodiment
Meaning combination.
The present invention provides a kind of high-salt wastewater simultaneous denitrification process for sulfur removal, comprises the following steps：(1) adopt UASB or EGSB
Reactor, with the municipal wastewater treatment plant second pond mud of strand as seed sludge, with rich in S2-、NO2 -Simulated wastewater is water inlet, with
When add 1-5g/L NaHCO3(providing inorganic carbon source), in simulated wastewater, acetate and the Ratio control of sulfide concentration exist
1:5～2:In the range of 1, under conditions of salinity is 3.5%, the mud rich in facultative desulfurization denitrifying microorganism for the domestication, treat
S2-And NO2 -Clearance, more than 90%, completes to tame；Described simulated wastewater S2-And NO2 -Mol ratio be 1:2.5, pH value is
7.0；The temperature of described reactor is 30 DEG C；(2) with using UASB or EGSB reactor, with the municipal wastewater treatment plant second pond of strand
(volume ratio is 1 to the mixing sludge that mud and sea outfall bed mud mix:0.8～1.2) it is seed sludge, to be rich in
NH4 +、NO2 -Simulated wastewater is water inlet, adds 1-5g/L NaHCO simultaneously3(inorganic carbon source is provided), the bar being 3.5% in salinity
Under part, tame salt tolerant anaerobic ammonia oxidizing bacteria, treat NH4 +、NO2 -Clearance, more than 90%, completes to tame；Described simulated wastewater NH4 +、NO2 -Mol ratio be 1:1.3, pH value is 7.0；The temperature of described reactor is 30 DEG C；(3) by said two devices mud according to body
Long-pending ratio is 1：1.2 being inoculated in UASB or EGSB reactor, temperature of reactor is controlled to be 30 DEG C, pH value 7.0, HRT is 2.5-
10h, when salinity of intaking is 3.5%～5%, the mol ratio of ammonia and sulfide in water inlet is adjusted to 1:1.6, ammonia and nitrous
The mol ratio of hydrochlorate is adjusted to 1:4；When salinity of intaking is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:1.6,
Ammonia and nitrite mole be not more than 1:4；Continue to run with 40-60 days, that is, the synchronization completing sulfide, nitrite and ammonia is gone
Remove；The concentration that ammonia in wherein said waste water is in terms of N, nitrite concentration is in terms of N, sulfide is in terms of S be respectively 50～
300mg/L, 200～1950mg/L, 50mg/L～500mg/L.
When salinity of intaking is 3.5%～5%, the clearance of sulfide, nitrite and ammonia reaches 90%, 95% respectively
With more than 90%, and the sulfide removing mainly is existed with elemental sulfur form, elemental sulfur theoretical yield more than 90%；When water inlet salt
When concentration is 5%～8%, the clearance of sulfide, nitrite and ammonia reaches 95%, 97% and more than 95% respectively, and removes
Sulfide mainly with elemental sulfur form exist, elemental sulfur theoretical yield more than 95%.Mud in end of run reactor with
Based on salt tolerant and foster desulfurization denitrifying microorganism and salt tolerant anaerobic ammonia oxidizing bacteria；Preferably described salt tolerant and the foster micro- life of desulfurization denitrification
Thing is preferably one or more of Marinobacter, Thiobacillus, Thauera, Thioalkalispira；Preferably
Described salt tolerant anaerobic ammonia oxidizing bacteria is preferably Scalindua.
Specific embodiment two：Present embodiment from unlike specific embodiment one：Simulated wastewater in step one
S2-With NO2 -Mol ratio 2.0, simulated wastewater pH be 8.Other steps and parameter are identical with specific embodiment one.
Specific embodiment three：Present embodiment from unlike specific embodiment one：Simulated wastewater in step 2
NH4 +- N and NO2 -Mol ratio be 1.32, pH be 6.Other steps and parameter are identical with specific embodiment one.
Specific embodiment four：Present embodiment from unlike specific embodiment one：The pH of reactor in step 3
For 6.Other steps and parameter are identical with specific embodiment one.
Specific embodiment five：Present embodiment from unlike specific embodiment one：The pH of reactor in step 3
For 8.Other steps and parameter are identical with specific embodiment one.
Specific embodiment six：Present embodiment from unlike specific embodiment one：Step 3 water inlet salinity be
When 3.5%～5%, the mol ratio of ammonia and sulfide is adjusted to 1:2.7, the mol ratio of ammonia and nitrite is adjusted to 1:6.7；When
When water inlet salinity is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:2.7, the mol ratio of ammonia and nitrite is
0.2.Other steps and parameter are identical with specific embodiment one.
Specific embodiment seven：Present embodiment from unlike specific embodiment one：Step 3 water inlet salinity be
When 3.5%～5%, the mol ratio of ammonia and sulfide is adjusted to 1:2.5, the mol ratio of ammonia and nitrite is adjusted to 1:5；When entering
When water salinity is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:2.5, the mol ratio of ammonia and nitrite is 0.1.
Other steps and parameter are identical with specific embodiment one.
Specific embodiment eight：Present embodiment from unlike specific embodiment one：Step 3 water inlet salinity be
When 3.5%～5%, the mol ratio of ammonia and sulfide is adjusted to 1:2.0, the mol ratio of ammonia and nitrite is adjusted to 1:6.5；When
When water inlet salinity is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:2.0, the mol ratio of ammonia and nitrite is
0.25.Other steps and parameter are identical with specific embodiment one.
Specific embodiment nine：Present embodiment from unlike specific embodiment eight：Step 3 water inlet salinity be
When 3.5%～5%, the mol ratio of ammonia and sulfide is adjusted to 1:2.3, the mol ratio of ammonia and nitrite is adjusted to 1:6；When entering
When water salinity is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:2.2, the mol ratio of ammonia and nitrite is 0.2.
Other steps and parameter are identical with specific embodiment one.
Specific embodiment ten：Present embodiment is implemented according to following steps：(1) adopt EGSB reactor, with strand
Municipal wastewater treatment plant second pond mud is seed sludge, with rich in S2-、NO2 -Simulated wastewater is water inlet, adds 2.5g/L simultaneously
NaHCO3(provide inorganic carbon source), in simulated wastewater, the Ratio control of acetate and sulfide concentration is 1:5～2:1 scope
Interior, under conditions of salinity is 3.5%, the mud rich in facultative desulfurization denitrifying microorganism for the domestication, treat S2-And NO2 -Remove
Rate, more than 90%, completes to tame；Described simulated wastewater S2-And NO2 -Mol ratio be 1:2.5, pH value is 7.2；Described reaction
The temperature of device is 30 DEG C；(2) with EGSB reactor, mixed with the municipal wastewater treatment plant second pond mud of strand and sea outfall bed mud
(volume ratio is 1 to the mixing sludge closing:1.0) it is seed sludge, with rich in NH4 +、NO2 -Simulated wastewater is water inlet, throws simultaneously
Plus 2.0g/L NaHCO3(providing inorganic carbon source), under conditions of salinity is 3.5%, tames salt tolerant anaerobic ammonia oxidizing bacteria, treats
NH4 +-N、NO2 -Clearance, more than 90%, completes to tame；Described simulated wastewater NH4 +、NO2 -Mol ratio be 1:1.3, pH value is
7.0；The temperature of described reactor is 30 DEG C；(3) by said two devices mud according to volume ratio be 1：1.0 are inoculated in EGSB reactor
Interior, control temperature of reactor to be 30 DEG C, pH value 7.2, HRT is 2.5-10h, when salinity of intaking is 3.5%～5%, will enter
In water, the mol ratio of ammonia and sulfide is adjusted to 1:The mol ratio of 1.6-2.7, ammonia and nitrite is adjusted to 1:4-6.7；When entering
When water salinity is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:1.6-2.7, ammonia and nitrite mole less
In 1：4；Continue to run with 40-60 days, that is, the synchronization completing sulfide, nitrite and ammonia removes；Ammonia in wherein said waste water
In terms of N, nitrite concentration is in terms of N, sulfide is in terms of S concentration be respectively 50～300mg/L, 200～1950mg/L,
50mg/L～500mg/L.
Comparative example 1：According to CN104843863A methods described, that is, with the mixed training thing of anaerobic ammonia oxidizing bacteria-thiobacillus denitrificanss
For main body, in same reactor, at 25～35 DEG C, wastewater pH is adjusted to 7.5～8.0 to temperature control, and hydraulic detention time is 2.5
～10h, in described waste water ammonia in terms of N, nitrite is in terms of N, sulfide is in terms of S concentration be respectively 40～300mg/L, 50～
390mg/L, 30～170mg/L, and the ratio of the concentration that ammonia is counted with N, nitrite is counted with N is 1：1～1.32, sulfide is with S
The ratio of the concentration that meter, ammonia are counted with N is 1:1.54～1.74, carry out control experiment, the results are shown in Table 1.
Comparative example 2：According to Guo Qiong methods described, that is, adopt isopyknic anaerobic ammonium oxidation granular sludge and methane phase granule
Mud is seed sludge, and in same reactor, at 32 DEG C about, wastewater pH is adjusted to 7.5～8.0 to temperature control, hydraulic retention
Time is 3.3～10h, in described waste water ammonia in terms of N, nitrite is in terms of N, sulfide is in terms of S concentration be respectively 40～
300mg/L, 50～390mg/L, 30～170mg/L, and the ratio of the concentration that nitrite is counted with N, sulfide is counted with S is 2.03
～2.27, the ratio of the concentration that sulfide is counted with S, ammonia is counted with N is 1:1.54～1.74, carry out control experiment, the results are shown in Table 1.
From table 1, according to the method in the present invention when salinity of intaking is 3.5%～5%, sulfide, nitrous acid
The clearance of salt and ammonia reaches 95%, 92% and more than 90% respectively, and the sulfide removing mainly is existed with elemental sulfur form, single
Matter sulfur theoretical yield more than 92%；When salinity of intaking is 5%～8%, the clearance of sulfide, nitrite and ammonia is respectively
Reach 90%, 91% and more than 90%, and the sulfide removing mainly existed with elemental sulfur form, elemental sulfur theoretical yield 90% with
On.And according to the method in contrast experiment 1, when salinity is 3.5%～5%, the clearance of sulfide, nitrite and ammonia
Reach 62.3%～71.2%, 63.2%～71.7% and 62.4%～72.5% respectively；When salinity of intaking is 5%～8%,
The clearance of sulfide, nitrite and ammonia reaches 35%～38.3%, 38.3%～40.2% and 40.4%～41.4% respectively,
Elemental sulfur cumulative percentage is also only 35.5%～37.5%.According to the method in contrast experiment 2, it is 3.5%～5% in salinity
When, the clearance of sulfide, nitrite and ammonia reaches 65.3%～73.2%, 65.2%～73.7% and 65.4% respectively～
73.7%；When salinity of intaking is 5%～8%, the clearance of sulfide, nitrite and ammonia reaches 38% respectively～
42.3%th, 40.2%～43.2% and 42.4%～43.4%, elemental sulfur cumulative percentage is also only 38.5%～39.5%.It can be seen that,
Compared with contrast method, the method in the present invention has more preferable brine waste sulfur nitrogen simultaneous removing effect, and can efficiently tire out
Long-pending elemental sulfur.
Claims (9)
1. a kind of high-salt wastewater simultaneous denitrification process for sulfur removal, comprises the following steps：
(1) adopt UASB or EGSB reactor, with Sewage Plant second pond mud as seed sludge, with rich in S2-And NO2 -Simulation
Waste water is water inlet, adds NaHCO simultaneously3With acetate as organic carbon source, wherein NaHCO3Concentration in simulated wastewater is 1-
5g/L, in simulated wastewater, the Ratio control of acetate and sulfide concentration is 1:5～2:In the range of 1；Simulated wastewater contains
Under conditions of salt amount is 2-5wt%, the mud rich in facultative desulfurization denitrifying microorganism for the domestication, treat S2-And NO2 -Clearance exists
More than 90%, complete to tame；Described simulated wastewater S2-With NO2 -- mol ratio be 1:2.4-2.8, pH value is 6-8.5；Described anti-
The temperature answering device is 25-35 DEG C；
(2) with using UASB or EGSB reactor, with mixing that Sewage Plant second pond mud and sea outfall bed mud mix
Conjunction mud is seed sludge, and the volume ratio of described Sewage Plant second pond mud and sea outfall bed mud is 1:0.8～1.2, with
Rich in NH4 +And NO2 -Simulated wastewater be water inlet, add NaHCO simultaneously3, described NaHCO3Concentration in simulated wastewater is 1-
5g/L, under conditions of salinity is for 2-5wt%, tames salt tolerant anaerobic ammonia oxidizing bacteria, treats NH4 +、NO2 -Clearance 90% with
On, complete to tame；Described simulated wastewater NH4 +With NO2 -Mol ratio be 1:1.2-1.4, pH value is 6-8.5；Described reactor
Temperature is 25-35 DEG C；
(3) by said two devices mud according to volume ratio be 1：0.8～1.5 is inoculated in UASB or EGSB reactor, controls reaction
Device temperature is 20-35 DEG C, and pH value 6-8.5, HRT are 2.5-10h, continue to run with 40-60 days, that is, complete sulfide, nitrite
Synchronization with ammonia removes；The concentration that ammonia in wherein said waste water is in terms of N, nitrite concentration is in terms of N, sulfide is in terms of S is divided
Wei not 50～300mg/L, 200～1950mg/L, 50mg/L～500mg/L.
2. the method for claim 1 is it is characterised in that process operation terminates the removal of after cure thing, nitrite and ammonia
Rate reaches 90%, 95% and more than 90% respectively, and the sulfide removing mainly is existed with elemental sulfur form, elemental sulfur theoretical yield
More than 90%.
3. the method for claim 1 is it is characterised in that the mud in end of run reactor is anti-with salt tolerant and foster desulfurization
Based on nitrifying microorganisms and salt tolerant anaerobic ammonia oxidizing bacteria.
4. the method for claim 1 is it is characterised in that described salt tolerant and foster desulfurization denitrifying microorganism are
One or more of Marinobacter, Thiobacillus, Thauera, Thioalkalispira；Described salt tolerant anaerobism
Ammonia oxidation bacteria is Scalindua.
5. the method for claim 1 is it is characterised in that S in step (1)2-、NO2 -Mol ratio be 1:2.5-2.7, more excellent
Elect 1 as:2.6.
6. the method for claim 1 is it is characterised in that NH in step (2)4 +With NO2 -Mol ratio be 1:1.3-1.4, more
It is preferably 1:1.32.
7. the method for claim 1 is it is characterised in that in step (3) when waste water salinity is 3.5%～5%, incite somebody to action
In water inlet, the mol ratio of ammonia and sulfide is adjusted to 1:The mol ratio of 1.6-2.7, ammonia and nitrite is adjusted to 1:4-6.7；When
When waste water salinity is 5%～8%, ammonia is controlled to be 1 with the mol ratio of sulfide:1.6-2.7, ammonia and nitrite mole not
More than 1:4.
8. the method for claim 1 is it is characterised in that described Sewage Plant second pond mud comes from the dirt of coastal city
Water treatment plant.
9. the method for claim 1 is it is characterised in that the salinity of simulated wastewater described in described step (1) and (2)
For 3.5wt%.
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| CN107265631A (en) * | 2017-06-28 | 2017-10-20 | 中国石油大学(华东) | A kind of short-cut denitrification Fast implementation |
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