CN108658243A - A kind of method of quick removal coal gas wastewater organic pollution - Google Patents
A kind of method of quick removal coal gas wastewater organic pollution Download PDFInfo
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- CN108658243A CN108658243A CN201810293365.6A CN201810293365A CN108658243A CN 108658243 A CN108658243 A CN 108658243A CN 201810293365 A CN201810293365 A CN 201810293365A CN 108658243 A CN108658243 A CN 108658243A
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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
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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
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- Hydrology & Water Resources (AREA)
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Abstract
The invention discloses a kind of minimizing technologies for coal gas wastewater organic pollution, include the following steps substantially：(1) bacterial strain for choosing the thermophilic/Facultative Halophiles that can generate compatible solute or the resistance to infiltration culture under mixed bacterial progress hypersaline environment；(2) thalline were collected by centrifugation and is launched in coal gas wastewater, and the removal that organic pollution is completed after the floc sedimentation in waste water completely precipitation is stood.This method is used as particle skeleton by the compatible solute of the extracellular release of thalline with the intermolecular suction-operated of organic pollution (including mainly polycyclc aromatic compound, heterocyclic compound, petroleum hydrocarbon) and by thalline itself, and quickly wadding gathers, precipitates to reach the quick separating removal to pollutant, has the advantages that quick, efficient, free of contamination.
Description
Technical field
The present invention relates to field of industrial waste water treatment, more particularly in a kind of coal gas wastewater organic pollution it is quick
Minimizing technology.
Background technology
Coal is still the main source of AND ENERGY RESOURCES CONSUMPTION IN CHINA at present.Compared with the Land use systems that directly burn, coal gas technology
Environmental pollution is lighter, and it is very strong to the adaptability of coal quality, and resource conversion and utilization ratio are high.But it was produced using the technology
It will produce pollution level height in journey, be difficult to biodegradable, poisonous and hazardous coal gas wastewater.Organic pollution in coal gas wastewater
Type is various and chemical composition is complex in composition, especially wherein contains a large amount of polycyclc aromatic compound, heterocyclic compound, stone
Petroleum hydrocarbon etc. is to murder by poisoning organic matter of the biology proliferation with strong inhibition effect, it is difficult to which open loop, chain rupture convert and be biological utilisation, drop
Solution.For by typical Shandong, strange gasification process generates coal gas wastewater, COD value is usually 22000-35000mg/L, and wherein
The concentration for being only difficult to the aldehydes matter of degradation is as high as 7500mg/L.Existing coal gas wastewater treatment process includes mainly materialization
Pretreatment, biological treatment and advanced treating three parts.Preprocessing process mainly removes the high concentration phenols for influencing microorganism growth
Substance, oily substance and ammonia nitrogen, to avoid the collapse of biological treatment system.Dephenolize mainly uses extraction-dephenolize technology recycling useless
The crude phenols of water, this method need to use a large amount of isopropyl ether or the classes organic solvent such as Di Iso Propyl Ether or methyl iso-butyl ketone (MIBK),
Heavy contamination and cost is higher.Oil removing (predominantly aromatic compound and petroleum hydrocarbon) mainly uses Bubble-floating Method, flocculent precipitation
Or two methods combine and detach oil from waste water.The equipment that Bubble-floating Method uses is complex, and operating cost is higher, and holds
Easily cause serious bubble-related issues；And flocculent precipitation is due to that will add a large amount of aluminium polychloride (PAC) coagulant and poly- third
Acrylamide (PAM), the problem that there is also chemical levels greatly, pollution is high.
Currently many studies have shown that the thermophilic salt or salt tolerant that there are much resistance to infiltrations under extreme environment especially hypersaline environment are micro-
Biology, in addition to using intracellular accumulation K+And Cl-Strategy balance extraneous osmotic pressure, many thermophilic salt, Facultative Halophiles can also pass through born of the same parents
The mechanism of interior accumulation compatible solute resists hypersaline environment.Different thermophilic salt or the produced compatible solute of salt-durable microbe are not to the utmost
Identical, the compatible solute for being seen in report at present includes：Betaines, tetrahydropyrimidine class, proline class, glutamic acid-type and more
Carbohydrate etc..Many microorganisms can accumulate different compatible solutes simultaneously, and often the environmental condition residing for it selects most
Effective reply type.
Kar et al. (Pilot scale production, kinetic modeling, and purification of
glycine betaine and trehalose produced from Actinopolyspora halophila(MTCC
263)using acid whey:A dairy industry effluent[J].Chemical Engineering
Science,2017,163:83-91) research finds that Halophiles Actinopolyspora halophila (MTCC 263) can profit
Yoghourt by-product acids whey is prepared with Milk Products Plant, and in intracellular accumulation glycinebetaine and trehalose.Tao et al.
(Ectoine and 5-hydroxyectoine accumulation in the halophile Virgibacillus
halodenitrificans PDB-F2in response to salt stress[J].Applied Microbiology
and Biotechnology,2016,100(15):6779-6789) research finds Halophilic Bacterium Virgibacillus
Halodenitrificans PDB-F2 can be in intracellular accumulation tetrahydropyrimidine and hydroxy tetrahydro pyrimidine, and under the conditions of different salinity
The ratio difference of the two is larger.Kim et al. (Identification of Trans-4-Hydroxy-L-Proline as a
Compatible Solute and Its Biosynthesis and Molecular Characterization in
Halobacillus halophilus[J].Frontiers in Microbiology,2017,8:2054) research shows that in
Degree Halophiles Halobacillus halophilus are to resist osmotic pressure to wrap in a variety of compatible solutes of intracellular accumulation
Glycinebetaine, glutamic acid, glutamine, proline and tetrahydropyrimidine are included, wherein proline is main compatible solute.
Ongagna-Yhombi et al. (Biosynthesis of the Osmoprotectant Ectoine, but Not Glycine
Betaine,Is Critical for Survival of Osmotically Stressed Vibrio
Parahaemolyticus Cells [J] .Applied and Environmental Microbiology, 2013,79 (16):
5038-5049) research discovery Facultative Halophiles Vibrio parahaemolyticus are 6% in NaCl concentration, intracellular compatible material
The amount of accumulation is glycinebetaine ＞ choline ＞ proline=glutamic acid ＞ tetrahydropyrimidines.
Invention content
The object of the present invention is to provide removals that is a kind of fast and effective and polluting extremely low coal gas wastewater organic pollution
Method.
Technical solution of the present invention is specific as follows：
(1) bacterial strain or mixed bacterial for choosing the thermophilic/Facultative Halophiles that can generate compatible solute carry out under hypersaline environment
Resistance to infiltration culture；The hypersaline environment refer to bacterial strain be resistant to have certain density saline environment, in the saline environment
Lower bacterial strain can keep the growth of given pace and in a certain amount of compatible solute of intracellular accumulation.
(2) thalline were collected by centrifugation and is launched in coal gas wastewater, stands after the floc sedimentation in waste water completely precipitation
Complete the removal of organic pollution.
Further, following detecting step can be first carried out before above-mentioned steps (2)：The resistance to infiltration culture of hypersaline environment will be passed through
Thalline be transferred to hypotonic environment and detect the instantaneous relase amount of the extracellular compatible solute of thalline, if detected a certain amount of extracellular
Compatible solute thens follow the steps (2), and dispensing of the thalline in waste water can be adjusted according to the instantaneous relase amount of compatible solute
Amount；If no compatible solute release, returns to step (1), reselects suitable bacterial strain (or mixed bacterial).It is described
Hypotonic environment refers to salinity less than the hypersaline environment and bacterial strain can be promoted to discharge rapidly surviving for intracellular compatible solute
Environment.
The detection method of the compatible solute instantaneous relase amount is：Thalline Jing Guo hypersaline environment culture is transferred to hypotonic
Centrifugation removes thalline after standing 20~30s in solution, takes supernatant that methanol/chloroform/water extract is added, is centrifuged after vortex oscillation
Make liquid split-phase and collect upper strata aqueous phase, add chloroform/water extract, upper strata aqueous phase is collected by centrifugation after vortex oscillation, is lyophilized
Compatible solute dry weight is weighed afterwards.
Further, for mixed bacterial, the salinity of resistance to infiltration culture is 10~25% under the hypersaline environment.More into one
Step ground, for mixed bacterial, the specific treatment conditions of resistance to infiltration culture are under the hypersaline environment：Salinity 15%, 37 DEG C of temperature,
Incubation time is no less than 7 days.
The present invention provides a kind of minimizing technology of coal gas wastewater organic pollution, this method passes through the extracellular release of thalline
Compatible solute and organic pollution (mainly include polycyclc aromatic compound, heterocyclic compound, petroleum hydrocarbon) it is intermolecular
Suction-operated and quickly wadding is poly-, precipitates to reach the quick separating removal to pollutant as particle skeleton by thalline itself,
Have the advantages that quick, efficient, free of contamination.
Description of the drawings
Muddy degree comparison of Fig. 1 waste water before and after putting into 2 thalline of mixed bacterial, wherein a are before thalline is put into, and b is to throw
After entering.
Fig. 2 waste water water body after putting into bacterial strain 1,2,3,4 respectively becomes clarification, and precipitation is formed on bottom, and wherein a is input bacterial strain
After 1, b is to put into after bacterial strain 2, and c is to put into after bacterial strain 3, after d is input bacterial strain 4.
Fig. 3 sedimentation basin cross-section structure schematic diagrams.
Specific implementation mode
The waste water for being used for doing decontamination test in following embodiment is the strange coal gas wastewater in Shandong, and COD value is about
25000mg/L, salinity are typically not greater than 2%.
Embodiment 1
Thermophilic/salt tolerant mixed bacterial that embodiment 1 uses is originated from the high bittern in the Tanggu saltpan crystallizing pond of Binhai New Area in Tianjin
Water.The acquisition step of flora is as follows：
(1) enriching floras：The appropriate high bittern water of acquisition is inoculated into the 2216E culture mediums that NaCl concentration is 300g/L, and 37
DEG C isothermal vibration culture 7d, enrichment obtain thermophilic/salt tolerant mixed bacterial 1.
(2) resistance to infiltration culture with high salt：Mixed bacterial 1 is inoculated in the 2216E culture mediums that NaCl concentration is 100~250g/L
In continue resistance to infiltration culture, obtain thermophilic/salt tolerant mixed bacterial 2 after 37 DEG C of isothermal vibration culture 7d.
The NaCl concentration of culture medium is relatively low compared with step (1) in the step, it is therefore intended that further enrichment is grown
The mixed bacterial of speed, while the compatible solute that the saline environment can promote bacterium cylinder accumulation more again.According to
There is research, Halophiles is generally lived in the saltwater environment that salinity is 10~30% (w/v), and Facultative Halophiles can be in lower salinity
It is grown in environment, but relatively low salinity is unfavorable for the accumulation of thalline internal contact compatibility solute.Training of the inventor to mixed bacterial 1
It supports and the measurement result of intracellular compatible solute accumulation shows flora intracellular under salt environment of the NaCl concentration less than 100g/L
The accumulation of compatible solute is relatively low, and reproduction speed is slower when NaCl concentration reaches 300g/L, in the salt water ring of 150g/L
The accumulation of biomass and intracellular compatible solute in border is all higher (shown in table 1).
1 mixed bacterial 1 of table cultivates the accumulation of biomass and intracellular compatible solute after 7d under different salinity
* compatible solute dry weight/thalline fresh weight
(3) measurement of compatible solute instantaneous relase amount：By mixed bacterial 2 be transferred to NaCl concentration be 10~
Thalline is quickly resuspended in the sterile water of 20g/L, 5000rpm centrifuges 10min after standing 20s, takes supernatant that 1mL is added
Extract (methanol：Chloroform：Water=10：5：4, v/v), 13000rpm centrifuges 30min after vortex oscillation 60min, collects upper water
Phase is added after chloroform and water each 1mL, vortex oscillation 30min again 13000rpm and centrifuges 30min, and collection upper strata aqueous phase claims after freeze-drying
Measure compatible solute dry weight.The results are shown in Table 2.
(4) microorganism collection and dispensing：The bacterium solution of mixed bacterial 2 is taken, thalline were collected by centrifugation, and (5000r/min centrifuges 10min
Afterwards, abandon supernatant and take precipitation) it is put into waste water by the dosage of 3~5g/L of thalline fresh weight afterwards.
The COD of water sample after visually observing waste water flocculating situation and measuring waste water before treatment using alkali formula permanganimetric method
Value.
Visual results show：After mixed bacterial 2 puts into waste water, present the waste water of emulsion in very short time (5~
10s) occur to flocculate and generate a large amount of flocculent deposits, be sunk to the bottom completely after standing several minutes, waste water becomes clarification (figure from muddiness
1).COD value measurement result is as shown in table 3.
Embodiment 2
The pure bacterial strain of thermophilic/Facultative Halophiles that embodiment 2 is chosen is originated from the high bittern in the salt pond of Tianjin Hangu long reed Daqinghe River saltern
Water.The specific purification procedures of bacterial strain are as follows：
(1) it carries out enriching floras using collected high bittern water and resistance to infiltration with high salt is cultivated, method is complete with embodiment 1
It is identical, obtain thermophilic/salt tolerant mixed bacterial 3 by being enriched with and cultivating.
(2) separation of pure bacterial strain：The bacterium solution 1mL of mixed bacterial 3 is taken, after diluting 10,100,500,1000,2000 times respectively
It is applied on the 2216E solid plates that NaCl concentration is 15%, plate seal is inverted in 37 DEG C of incubators after cultivating a couple of days
The tablet that bacterium colony is evenly distributed is chosen, purifying training is carried out in the 2216E culture mediums that picking single bacterium colony merging NaCl concentration is 15%
It supports, 37 DEG C of 5~7d of culture.Finally plate streak is used to carry out bacterial strain purifying, purification step is at least repeated 3 times, until obtaining
Purify bacterial strain.
It is isolated and purified by step (2) and obtains 58 plants of pure bacterial strains, therefrom chosen 4 plants of speeds of growth and carried out than faster bacterial strain
16SrDNA sequence analyses.The result shows that：Wherein two plants of Pseudomonas are a kind of halophilic archaeas in Halorubrum, can be in NaCl concentration
It grows, is typically found in the neutral salt environment such as salt lake and saltern, in addition two plants of bacterium point in brine for 5%~30% (w/v)
Not Wei Halophilic Bacterium Pseudomonas halophila and extreme halotolerant bacterium Salicola marasensis, the equal energy of the two
It is grown in the hypersaline environment that NaCl concentration is 15%~30% (w/v).
Above-mentioned 4 plants of bacterium are numbered, two plants of halophilic archaeas of Halorubrum number bacterial strain 1 and bacterial strain respectively will be belonged to
2, Halophilic Bacterium Pseudomonas halophila are bacterial strain 3, and extreme halotolerant bacterium Salicola marasensis are bacterium
Strain 4.
Above-mentioned 4 plants of bacterium are inoculated in the 2216E culture mediums that NaCl concentration is 150g/L and continue resistance to infiltration culture, 37
DEG C isothermal vibration culture is to OD600Value is more than the measurement that extracellular compatible solute instantaneous relase amount is carried out after 1.0.Assay method with
1 step of embodiment (3) is identical.Measurement result is as shown in table 2.
The instantaneous relase amount of 24 plants of bacterium of table and mixed bacterial 2 compatible solute under hypotonic environment
* compatible solute dry weight/thalline fresh weight
Taking above-mentioned 4 plants of bacterium and two control groups respectively, (control 1 is Escherichia coli, is cultivated for 24 hours under 37 DEG C, 3% salinity；
Control 2 is bacterial strain 1, after culture with high salt identical with above-mentioned other 3 plants of strains to be tested again in 3% salinity it is hypotonic under the conditions of
Culture is for 24 hours) bacterium solution, thalline were collected by centrifugation, determines that respective dosage is put into according to the instantaneous relase amount of extracellular compatible solute
Into waste water.The COD of water sample after visually observing waste water flocculating situation and measuring waste water before treatment using alkali formula permanganimetric method
Value.
Visual results show：The waste water of presentation emulsion is after putting into 4 kinds of bacterium within the extremely short time (3~5s)
Occurring to flocculate and generate a large amount of flocculent deposits, and is sunk to the bottom completely in 5min, waste water is become clarifying (Fig. 2) from muddiness, and
The waste water muddiness degree of two control groups is unchanged.COD value measurement result is as shown in table 3.1 Escherichia coli cannot as a contrast
Compatible solute is accumulated, does not have flocculation ability.After 2 bacterial strain 1 under the conditions of hypotonic due to cultivating a period of time as a contrast
It is extracellular to be discharged without compatible solute, do not have flocculation ability, almost not working to the removal of COD in waste water, (two are right yet
The measurement of the waste water progress COD value of muddy state is directly taken according to group).The COD removal rates of bacterial strain 1~4 all reach 90% or so, thalline
Dosage in waste water carries out appropriate increase and decrease according to the instantaneous relase amount of respective compatible solute.
The effect of 3 different strains of table and flora processing waste water
* the corresponding dosage of every liter of waste water
Embodiment 3
Waste water is pre-processed using bacterial strain 2 as microbial inoculum, it is main (to remove the virtue in water body including dephenolize and oil removing
The organic pollutions such as fragrant compounds of group, heterocyclic compound, petroleum hydrocarbon).Bacterial strain 1 first carries out the with high salt resistance to of a period of time before dispensing
Infiltration culture, method are same as Example 2.Pretreatment carries out in sedimentation basin.As shown in figure 3, being entered by water inlet 1 in waste water
While sedimentation basin, microbial inoculum is constantly put by branch's charge door 2 of 1 side of water inlet (can also be by spray thrower directly from pond
Top be added), microbial inoculum additive amount be 8g/L, water be full of after stand 20~40min, it is to be precipitated completely after by processed waste water from
Water outlet 3 is discharged, and precipitation is discharged by the sludge pipe 4 in bottom of pond portion.The waste water that water outlet 3 is discharged is detected, the results showed that bacterium
The COD removal rates of 2 pairs of waste water of strain are 88%, and the COD value of processed waste water is 2650, entirely appropriate subsequent biological treatment and depth
Processing.
Claims (4)
1. a kind of minimizing technology of coal gas wastewater organic pollution, it is characterised in that include the following steps：
(1) it chooses the bacterial strain for the thermophilic/Facultative Halophiles that can generate compatible solute or resistance under mixed bacterial progress hypersaline environment is oozed
Culture thoroughly；The hypersaline environment refer to bacterial strain be resistant to have certain density saline environment, the bacterium under the saline environment
Strain can keep the growth of given pace and in a certain amount of compatible solute of intracellular accumulation；
(2) thalline were collected by centrifugation and is launched in coal gas wastewater, stands i.e. complete after the floc sedimentation in waste water completely precipitation
At the removal of organic pollution.
2. wastewater organic pollutant minimizing technology according to claim 1, it is characterised in that：It can be first before the step (2)
Carry out following detecting step：It will be transferred to hypotonic environment by the thalline of the resistance to infiltration culture of hypersaline environment and to detect thalline extracellular compatible
The instantaneous relase amount of property solute, if detect that a certain amount of extracellular compatible solute thens follow the steps (2), and can be according to compatible
Property solute injected volume of the instantaneous relase amount adjustment thalline in waste water；If no compatible solute release, returns and executes step
Suddenly (1).
3. wastewater organic pollutant minimizing technology according to claim 1 or 2, it is characterised in that：For the Mixed Microbes
Group, the salinity of resistance to infiltration culture is 10~25% under the hypersaline environment.
4. wastewater organic pollutant minimizing technology according to claim 1 or 2, it is characterised in that：For the Mixed Microbes
Group, the specific treatment conditions of resistance to infiltration culture are under the hypersaline environment：Salinity 15%, 37 DEG C of temperature, incubation time is no less than 7
It.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112390445A (en) * | 2020-10-30 | 2021-02-23 | 新疆宣力环保能源有限公司 | Method and system for treating phenol-ammonia wastewater |
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