CN114656043A - Treatment method of high-salt low-concentration organic wastewater - Google Patents
Treatment method of high-salt low-concentration organic wastewater Download PDFInfo
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- 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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Abstract
The invention provides a method for treating high-salt low-concentration organic wastewater, which comprises the following steps: and (3) adding activated and domesticated halophilic bacteria liquid into a biological contact oxidation device, controlling the reaction time of the biological contact oxidation device and the adding amount of the activated and domesticated halophilic bacteria liquid, and removing organic substances in the high-salt low-concentration organic wastewater. The invention solves the technical problem of how to treat the high-salt low-concentration organic wastewater at low cost, and the treatment method of the high-salt low-concentration organic wastewater provided by the invention can provide a biological treatment way for treating the high-salt low-concentration organic wastewater with 15-30% of salt content; the biological treatment efficiency of organic substances in the high-salt water is greatly improved; the investment cost of treatment facilities of the high-salt low-concentration organic industrial wastewater is greatly reduced; the operation cost in the treatment process of the high-salt low-concentration organic wastewater is greatly reduced; the tolerance concentration of the microbial strains to salt substances is greatly improved, and the tolerance concentration of organisms to salt is improved by more than 15 times.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for treating high-salt low-concentration organic wastewater.
Background
The main sources of the high-salinity wastewater are the following ways: (1) sea water: typically from drainage or cooling of recycled water in coastal municipal industrial water processes. (2) Industrial production: the high-salinity wastewater is mainly used for draining water generated in the production processes of enterprises such as printing, dyeing, refining, oil extraction, pharmacy, salt manufacturing and the like. (3) Salt-containing domestic sewage: the seawater is mainly from seawater utilization, and is used as domestic miscellaneous water which is not in direct contact with human bodies in urban life, such as fire fighting, road flushing, toilet flushing and the like. (4) Groundwater high in salt content: some regions have high salt content in underground water and high total soluble solid content, such as shallow underground water in river sleeve part of inner Mongolia and plain part of Hebei, which has brackish water and salt water.
The high-salt low-concentration organic wastewater is relatively common high-salt wastewater generated in part of industrial production processes, particularly the water quality in the inorganic chemical production process is more, the total salt content of the water quality is relatively high and is generally between 20 and 30 percent, and the COD concentration is between 200 and 500mg/L, so that the treatment process of the wastewater faces relatively great challenges.
Firstly, the characteristics and the facing problems of the high-salt low-concentration organic wastewater are as follows:
the treatment of high-salt low-concentration organic wastewater is a great environmental protection problem in the industrial development at the present stage. Comprehensive utilization is an important path for solving the bottleneck of high-salt low-concentration organic wastewater. The application of the high-salt low-concentration organic wastewater recycling technology is an important guarantee for obtaining remarkable economic benefit, environmental benefit and social benefit. The method is based on the current situation of treating the high-salt low-concentration organic wastewater and research progress.
At the present stage, the large-scale treatment of the high-salt low-concentration organic wastewater still has the characteristics of low treatment efficiency and high operation cost, and has a plurality of key technical problems needing to be broken through and solved. For example, when a forward osmosis method is adopted to treat high-salt low-concentration organic wastewater, the core problems of a forward osmosis membrane, an absorption solution and the like are not well solved; how to improve the water yield of reverse osmosis treatment, how to prolong the service life of membrane elements, how to effectively prevent membrane pollution and other problems still need to be solved.
The high-salt low-concentration organic wastewater refers to discharged wastewater with the total salt content of more than 1% from domestic sewage and industrial wastewater, contains higher inorganic ions such as Cl-, SO42-, Na +, Ca2+ and the like, and also contains organic matters such as glycerol and medium and low carbon chains. The wastewater treatment technology has more difficulty than common wastewater treatment because of complex and various components, high salinity and stronger inhibition effect on the growth of microorganisms. The amount of high-salt low-concentration organic wastewater generated in China accounts for a certain proportion of the total wastewater, and the amount of the high-salt low-concentration organic wastewater still continues to increase every year. Therefore, the treatment of high-salt low-concentration organic wastewater plays an important role in wastewater treatment, and is a key point and a difficult point of wastewater treatment research. The currently researched and commonly used methods for high-salt low-concentration organic wastewater include an evaporation method, an electrolysis method, a membrane separation method, an incineration method, a biological method and the like. The high-salt low-concentration organic wastewater refers to wastewater with the mass fraction of total salt calculated by NaCl content being more than or equal to 1%. Besides organic pollutants, the wastewater also contains a large amount of soluble inorganic salt ions such as calcium, magnesium, sodium, chlorine, sulfate radical and the like, and even contains radioactive substances.
Second, the current application situation of the high-salt low-concentration organic wastewater treatment technology
2.1 high efficiency Evaporation technology
The high-efficiency evaporation technology of the high-salt low-concentration organic wastewater generally aims at the high-salt low-concentration organic wastewater with the salt content of more than 4 ten thousand mg/L, and particularly mainly comprises the following steps for low-concentration high-salt water with the salt content of 1-4 percent: multiple-effect evaporation technology and mechanical vapor recompression technology. The multiple-effect evaporation technology refers to that a plurality of series-connected evaporators are used simultaneously, hot steam sequentially passes through a plurality of evaporators, the hot steam of the previous evaporator enters the next evaporator and is gradually evaporated, a heat source is effectively utilized, and the aim of desalting the high-salt low-concentration organic wastewater is fulfilled. The mechanical vapor recompression technology, MVR technology for short, is a technology for effectively utilizing a heat source by means of a vapor compressor, obtains power by recompression of vapor and continuously reciprocates so as to improve the heat utilization efficiency of the vapor. The technology of high-efficiency evaporation can successfully separate salt and water in the wastewater, and then the wastewater is respectively treated, so that the method is a relatively thorough method for treating the high-salt low-concentration organic wastewater, and the technology is widely applied to the coal chemical industry, the medicine industry and the pesticide industry at present. However, for brine with too high organic pollutant content in brine, foams are easily generated during evaporation to cause flushing, and the quality of salt can be affected, so that the salt is entrained with too much organic matters, and further treatment is required.
2.2 film treatment technique
The membrane distillation is a novel water treatment technology and is characterized in that the membrane distillation only needs to be carried out under the conditions of normal temperature and normal pressure without heating and pressurizing, and the filtering material is a hydrophobic microporous membrane. When the membrane distillation technology is adopted for water treatment, gas formed by volatilization of volatile substances contained in the liquid to be treated is utilized to form pressure difference on two sides of the treatment membrane, and the pressure difference penetrates through the treatment membrane to finally realize screening separation. Compared with the traditional recovery method, the method has the advantages of simple operation, less one-time investment and very high efficiency of recovering the concentrated water. The SunItheng research shows that the membrane distillation technology is stable in treatment and the salt rejection rate is as high as 99%. Neiying and the like select medium-pressure reverse osmosis, high-pressure reverse osmosis and ultrahigh-pressure reverse osmosis as core processes for high-concentration brine treatment, and the structures and the types of membrane elements of the medium-pressure reverse osmosis unit, the high-pressure reverse osmosis unit and the ultrahigh-pressure reverse osmosis unit are determined by calculation of American Dow ROSA software. Finally determining the treatment process of 'regulating tank + high-efficiency sedimentation tank + steam-water backflushing filter + ultrafiltration + high-pressure reverse osmosis + DTRO + evaporative crystallization'. After the system is adopted for treatment, high-concentration brine can be finally converted into reuse water, sludge and salt slurry, zero emission of the system is realized, and the treatment cost of each ton of water of the system is 23.243 yuan. The university of columbia in the united states develops and utilizes a 'reverse osmosis + Membrane Distillation (MD)' technology to treat strong brine for recycling salt, the scheme is at the experimental research stage at present, NaCl solution, synthetic seawater and high-salt low-concentration organic wastewater are combined through the technology respectively, good stability is shown, compared with the traditional technology, the salt yield quality is good, and the water recovery rate can reach more than 90%. The Electric Dialysis (ED) and evaporative crystallization technology is adopted by Marian Turek et al in Polish, compared with single evaporative concentration and crystallization, the combined process reduces the power consumption of crystallized salt from 970 kW.h to 500 kW.h, and has obvious energy-saving effect.
3. Future treatment technology prospect of high-salt low-concentration organic wastewater
The treatment of the high-salt low-concentration organic wastewater is mainly limited by factors such as high treatment cost of a physical and chemical method, large occupied area of a traditional biological method and the like, and particularly, the salinity of the high-salt low-concentration organic wastewater with excessively high salt content seriously influences the application of the traditional biological method in the treatment of the high-salt low-concentration organic wastewater. Therefore, the research on the treatment process of the high-salt low-concentration organic wastewater in the future mainly focuses on halophilic microorganisms for treating the high-salt low-concentration organic wastewater efficiently and quickly. The mechanism research mainly focuses on the salt reduction mechanism, the process condition and the effect of halophilic bacteria.
In the process of partial industrial production, high-salt low-concentration organic wastewater can be generated, such as high-salt low-concentration organic wastewater generated after the end membrane treatment of some inorganic chemical industries, partial fine chemical industries, partial electroplating industries and industrial wastewater, and the like, because no requirement is made on salt in the discharge process, but strict discharge requirements are made on organic pollutants such as COD and the like; therefore, the high-salt low-concentration organic wastewater is traditionally discharged by adopting an evaporation or multistage membrane treatment process to realize that the organic matters in the discharged wastewater reach the standard; these conventional methods are relatively expensive in investment and operation.
The inventor seeks a more efficient microbial metabolism path in the face of high-salt low-concentration organic industrial wastewater which is difficult to treat at home and even abroad, and treats the complex high-salt low-concentration organic industrial wastewater through a brand new biological treatment process route, so that the environmental protection investment and the operation cost of enterprises are greatly reduced. The technology is more environment-friendly and has no secondary pollution. Provides a brand new technical scheme for the standard discharge of the high-salt low-concentration organic wastewater.
Disclosure of Invention
In order to solve the technical problem of how to treat the high-salt low-concentration organic wastewater at low cost, the invention provides a method for treating the high-salt low-concentration organic wastewater, and a biological treatment way can be provided for treating the high-salt low-concentration organic wastewater with salt content of 15-30 (m/v)%; the biological treatment efficiency of organic substances in high-salinity water can be greatly improved; the investment cost of treatment facilities of the high-salt low-concentration organic industrial wastewater is greatly reduced; greatly reduces the operation cost in the process of treating the high-salt low-concentration organic wastewater.
In order to achieve the above object, the present invention provides a method for treating high-salinity low-concentration organic wastewater, comprising:
adding activated and domesticated halophilic bacteria liquid into a biological contact oxidation device, controlling the reaction time of the biological contact oxidation device and the adding amount of the activated and domesticated halophilic bacteria liquid, and removing organic substances in the high-salt low-concentration organic wastewater;
the halophilic bacteria strain comprises: salobacteria (hbt. jilantaiense, hap. paucihalophilus); halobacter (halotertilis, hbf. lacialsi, hbf. nitireducens); halococcus (hcc. dombrowskii, hcc. thailalandensis, hcc. qingdaonensis); albizia (nab. chahannaoensis); halophiles (Natronobacterium gregoryi) and erythrorhizobium salina (Natronorubrum banense, nrr.
Further, the method for activating and domesticating the halophilic bacteria strain comprises the following steps:
preparing 1 part of aqueous solution with 20-25 (m/v)% of salt concentration according to the components of the salt in the high-salt low-concentration organic wastewater to be treated;
mixing 1 part of high-salt low-concentration organic wastewater (containing corresponding organic matters) to be treated with the aqueous solution according to a ratio of 1:1 to obtain a culture solution;
adding molasses with the volume proportion of 5% into the culture solution, and inoculating halophilic bacteria strains according to 10% of the total volume of the culture solution;
controlling the dissolved oxygen DO to be not less than 2.0mg/L under the oxygen-enriched state, and ensuring that the temperature is not less than 20 ℃ to continuously react for 40 hours to obtain the bacteria liquid of the activated and domesticated halophilic bacteria.
Further, the mass ratio of the halophilic bacteria strain is as follows:
salobacteria (hbt. jilantaiense, hap. paucihalophilius): halobacter (halotertilis, hbf. lacialsi, hbf. nitireducens): halococcus (hcc. dombrowskii, hcc. thailalandensis, hcc. qingdaonensis): albizia (nab. chahannaoensis): halophilic and alkalophilic bacillus (Natronobacterium gregoryi): erythrorhizon salina (Natronorubrum bangense, nrr. ***se) ═ 8-15%: (12-20%): (10-19%): (6-15%): (12-20%): (16-25%).
Wherein, the water quality adaptation condition of the halophilic bacteria strain comprises the following steps:
salt with salt concentration of 15-30 (m/v)%;
the water quality is adaptive to the concentration of organic substances: the COD concentration is less than 1000 mg/L;
the organic species degraded include: one or more of organic matters of benzene rings, aromatic hydrocarbon organic matters, hydroxyl-containing substances, organic matters containing aliphatic hydrocarbon or ketone organic matters;
the pH value suitable for water quality is 6.0-11.2.
Wherein the salt comprises the following components: one or more of sodium chloride, sodium sulfate, sodium carbonate, calcium chloride, sodium bicarbonate, magnesium chloride or magnesium sulfate.
Wherein the optimal concentration of the organic substance concentration in the adaptive water quality is 200-600 mg/L.
Wherein the COD achieves the best removal effect when the amount of the activated and domesticated halophilic bacteria liquid is 6-10 g per ton of water, and the COD achieves the best removal effect when the reaction time is 12-14 hours.
Preferably, the salt content is between 20 and 30 percent, and the COD concentration is 500 mg/L; the COD reaches the best removal effect when the amount of the activated and domesticated halophilic bacteria liquid is 6g per ton of water, and the COD reaches the best removal effect when the reaction time is 12 hours.
Furthermore, the halophilic bacteria strain has a synergistic degradation effect on cyclic, benzene cyclic and complex chain molecular organic matters, and the degradation effect has a good removal effect between 15-30% of salt.
Further, the mechanism of the halophilic bacteria strain for removing organic substances in the high-salt low-concentration organic wastewater comprises the following steps:
the halobacter (Hbt. jilantaiense, hap. paucihalophilus) has good removal effect on organic matters such as aromatic hydrocarbon, aliphatic hydrocarbon and the like; the optimal adaptation salinity environment of the strain is between 20 and 30 percent;
haloform II (Hbf. lacisalaris, Hbf. nitireducens) and haloform (Hcc. dombrowskii, Hcc. thailalandensis, Hcc. qingdaonensis) have a synergistic removal effect on benzene ring substances and benzophenone substances, and can have a good degradation effect on the substances in an environment with salt content of 15-25%;
the halobios, the halophilic bacillus and the salinophilic rhodobacter have good degradation effects on aromatic hydrocarbon organic matters and hydroxyl-containing substances in a salt environment with 20-30% of salt.
The method for treating the high-salt low-concentration organic wastewater provided by the invention provides a biological treatment way for treating the high-salt low-concentration organic wastewater with the salt content of 15-30%; the biological treatment efficiency of organic substances in the high-salinity water is greatly improved; the investment cost of treatment facilities of the high-salt low-concentration organic industrial wastewater is greatly reduced; the operation cost in the process of treating the high-salt low-concentration organic wastewater is greatly reduced;
compared with the traditional biotechnology, the tolerance concentration of the microbial strains to salt substances is greatly improved, the traditional biochemical treatment especially has the tolerance limit concentration of 1-2% to salt, and the technology can improve the limit concentration to 30% and improve the tolerance concentration of organisms to salt by more than 15 times.
Drawings
FIG. 1 is a graph showing the relationship between COD concentration and bacterial liquid dosage.
FIG. 2 is a graph showing the relationship between COD concentration and reaction time.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment of the invention provides a method for treating high-salt low-concentration organic wastewater, which comprises the following steps:
adding activated and domesticated halophilic bacteria liquid into a traditional biological contact oxidation device, controlling the reaction time of the biological contact oxidation device and the adding amount of the activated and domesticated halophilic bacteria liquid, and removing organic substances in the high-salt low-concentration organic wastewater;
the halophilic bacteria strain comprises: salobacteria (hbt. jilantaiense, hap. paucihalophilus); halobacter (halotertilis, hbf. lacialsi, hbf. nitireducens); halococcus (hcc. dombrowskii, hcc. thailalandensis, hcc. qingdaonensis); albizia (nab. chahannaoensis); halophiles (Natronobacterium gregoryi) and erythrorhizobium salina (Natronorubrum banense, nrr.
Further, the method for activating and domesticating the halophilic bacteria strain comprises the following steps:
preparing 1 part of aqueous solution with the salt concentration of 20-25 (m/v)% according to the components of the salt in the high-salt low-concentration organic wastewater to be treated;
mixing 1 part of high-salt low-concentration organic wastewater (containing corresponding organic matters) to be treated with the aqueous solution according to a ratio of 1:1 to obtain a culture solution;
adding molasses with the volume proportion of 5% into the culture solution, and inoculating halophilic bacteria strains according to 10% of the total volume of the culture solution;
controlling the dissolved oxygen DO to be not lower than 2.0mg/L in the oxygen-enriched state, and ensuring that the temperature is not lower than 20 ℃ to continuously react for 40 hours to obtain the activated and domesticated halophilic strain liquid.
Further, the halophilic bacteria strain is prepared from the following components in percentage by mass:
salobacteria (hbt. jilantaiense, hap. paucihalophilius): halobacter (halotertilis, hbf. lacialsi, hbf. nitireducens): halococcus (hcc. dombrowskii, hcc. thailalandensis, hcc. qingdaonensis): albizia (nab. chahannaoensis): halophilic and alkalophilic bacteria (Natronobacterium gregoryi): erythrorhizon salina (Natronorubrum bangense, nrr. ***se) ═ 8-15%: (12-20%): (10-19%): (6-15%): (12-20%): (16-25%).
Wherein, the water quality adaptation condition of the halophilic bacteria strain comprises the following steps:
salt with salt concentration of 15-30 (m/v)%;
the water quality is adaptive to the concentration of organic substances: the COD concentration is less than 1000 mg/L;
the organic species degraded include: one or more of benzene ring organic matter, aromatic hydrocarbon organic matter, hydroxyl-containing matter, aliphatic hydrocarbon-containing organic matter or ketone organic matter;
the pH value suitable for water quality is 6.0-11.2.
Wherein the salt comprises the following components: one or more of sodium chloride, sodium sulfate, sodium carbonate, calcium chloride, sodium bicarbonate, magnesium chloride or magnesium sulfate.
As shown in figure 1, the optimal concentration of the organic substance in the adaptive water quality is 200-600 mg/L.
As shown in figure 2, COD achieves the best removal effect when the amount of the activated and domesticated halophilic bacteria liquid is 6-10 g per ton of water, and the COD achieves the best removal effect when the reaction time is 12-14 hours.
Preferably, the salt content is between 20 and 30 percent, and the COD concentration is 500 mg/L; when the amount of the activated and domesticated halophilic bacterial strain liquid is 6g, the COD can achieve the best removal effect, and the COD can achieve the best removal effect within 12 hours of reaction time.
Furthermore, the halophilic bacteria strain has a synergistic degradation effect on cyclic, benzene cyclic and complex chain molecular organic matters, and the degradation effect has a good removal effect between 15-30% of salt.
Further, the mechanism of the halophilic bacteria strain for removing organic substances in the high-salt low-concentration organic wastewater comprises the following steps:
the saltbacillus (Hbt. jilantaines, hap. paucihalophilus) has good removal effect on organic matters such as aromatic hydrocarbon and aliphatic hydrocarbon; the optimal adaptation salinity environment of the strain is between 20 and 30 percent;
haloform II (Hbf. lacisalaris, Hbf. nitireducens) and haloform (Hcc. dombrowskii, Hcc. thailalandensis, Hcc. qingdaonensis) have a synergistic removal effect on benzene ring substances and benzophenone substances, and can have a good degradation effect on the substances in an environment with salt content of 15-25%;
the halobios, the halophilic bacillus and the salinophilic rhodobacter have good degradation effects on aromatic hydrocarbon organic matters and hydroxyl-containing substances in a salt environment with 20-30% of salt.
Case analysis:
the invention relates to a practical case-Jiangsu chemical plant
The technology is used for replacing the rear-end high-salt low-concentration organic wastewater evaporation technology, the water amount is 300 tons/day, the water quality COD concentration is about 300mg/L, the salt content is between 150000-ion 160000mg/L, the salt components are mainly sodium chloride, a small amount of sodium sulfate, the COD main components are carboxyl compounds and ketone compounds, and the emission standard executed by the enterprise is that the COD is less than 60 mg/L.
The treatment process of the invention is as follows:
the halophilic bacteria strain ratio is as follows: salobacteria (hbt. jilantaiense, hap. paucihalophilius): halobacter (halotertilis, hbf. lacialsi, hbf. nitireducens): halococcus (hcc. dombrowskii, hcc. thailalandensis, hcc. qingdaonensis): albizia (nab. chahannaoensis): halophilic and alkalophilic bacillus (Natronobacterium gregoryi): rhodobacter salina (Natronorubrum bangense, nrr. ***se) 15%: 16%: 14%: 15%: 20%: 20 percent; the activation process of the strain is as follows: 20 (m/V)% salt solution was mixed with the above wastewater 1:1, adding 10% of strain and 5% of molasses, culturing and activating for 42 hours, and staying the wastewater in a biological contact oxidation pond for 14 hours. Wherein, the component ratio of salt in 20 (m/V)% salt solution is: the sodium chloride content is 90%: the sodium sulfate content was 10%.
The data after 8 g/ton of water is added to the bacteria liquid of the activated and domesticated halophilic bacteria strain are as follows:
the effects after the treatment of the patent technology of the invention are as follows: the average data after 30 days of stable operation are shown in table 1:
TABLE 1
| Item | Before treatment | After treatment | Removal rate |
| COD | 300mg/L | 42mg/L | 86％ |
And (4) experimental conclusion: the operation cost is 9 yuan/ton water (the cost is the expense of halophilic bacteria strains), no sludge is generated, the operation cost of evaporation is 200 yuan/ton water and 300 yuan/ton water, and the cost comprises the following steps: the disposal costs of steam and waste salts.
The method for treating the high-salt low-concentration organic wastewater provided by the embodiment of the invention provides a biological treatment way for treating the high-salt low-concentration organic wastewater with 15-30% of salt content; the biological treatment efficiency of organic substances in the high-salinity water is greatly improved; the investment cost of treatment facilities of the high-salt low-concentration organic industrial wastewater is greatly reduced; the operation cost in the process of treating the high-salt low-concentration organic wastewater is greatly reduced;
compared with the traditional biotechnology, the tolerance concentration of the microbial strains to salt substances is greatly improved, the traditional biochemical treatment especially has the tolerance limit concentration of 1-2% to salt, and the technology can improve the limit concentration to 30% and improve the tolerance concentration of organisms to salt by more than 15 times. As shown in table 2:
TABLE 2
| Patent of the invention | Conventional techniques |
| Suitable for 15 to 30 percent of salt | Is suitable for 1 to 3 percent of salt |
| The hardware investment is low | Large investment of hardware |
| The operation cost is less than 10 yuan per ton of water | The operating cost of the physicochemical technology is more than 100 yuan |
| Low energy consumption | High energy consumption |
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A method for treating high-salt low-concentration organic wastewater is characterized by comprising the following steps:
adding activated and domesticated halophilic bacteria liquid into a biological contact oxidation device, controlling the reaction time of the biological contact oxidation device and the adding amount of the activated and domesticated halophilic bacteria liquid, and removing organic substances in the high-salt low-concentration organic wastewater;
the halophilic bacteria strain comprises: salobacteria (hbt. jilantaiense, hap. paucihalophilus); halobacter (halotertilis, hbf. lacialsi, hbf. nitireducens); halococcus (hcc. dombrowskii, hcc. thailalandensis, hcc. qingdaonensis); albizia (nab. chahannaoensis); halophiles (Natronobacterium gregoryi) and erythrorhizobium salina (Natronorubrum banense, nrr.
2. The method of claim 1, wherein the method for activating acclimatization of halophilic bacteria comprises:
preparing 1 part of aqueous solution with 20-25 (m/v)% of salt concentration according to the components of the salt in the high-salt low-concentration organic wastewater to be treated;
mixing 1 part of high-salt low-concentration organic wastewater (containing corresponding organic matters) to be treated with the aqueous solution according to a ratio of 1:1 to obtain a culture solution;
adding molasses with the volume proportion of 5% into the culture solution, and inoculating halophilic bacteria strains according to 10% of the total volume of the culture solution;
controlling the dissolved oxygen DO to be not lower than 2.0mg/L in the oxygen-enriched state, and ensuring that the temperature is not lower than 20 ℃ to continuously react for 40 hours to obtain the activated and domesticated halophilic strain liquid.
3. The method according to claim 1 or 2, wherein the halophilic bacteria strain is prepared by the following mass ratio:
salobacteria (hbt. jilantainense, hap. paucihalophilus): halobacter (halotertilis, hbf. lacialsi, hbf. nitireducens): halococcus (hcc. dombrowskii, hcc. thailalandensis, hcc. qingdaonensis): albizia (nab. chahannaoensis): halophilic and alkalophilic bacillus (Natronobacterium gregoryi): erythrorhizon salina (Natronorubrum bangense, nrr. ***se) ═ 8-15%: (12-20%): (10-19%): (6-15%): (12-20%): (16-25%).
4. The method of claim 1 or 2, wherein the acclimatization of the halophilic bacteria strain comprises:
salt with salt concentration of 15-30 (m/v)%;
the water quality is adaptive to the concentration of organic substances: the COD concentration is less than 1000 mg/L;
the organic species degraded include: one or more of organic matters of benzene rings, aromatic hydrocarbon organic matters, hydroxyl-containing substances, organic matters containing aliphatic hydrocarbon or ketone organic matters;
the pH value suitable for water quality is 6.0-11.2.
5. The method of claim 4, wherein the composition of the salt comprises: one or more of sodium chloride, sodium sulfate, sodium carbonate, calcium chloride, sodium bicarbonate, magnesium chloride or magnesium sulfate.
6. The method of claim 4, wherein the optimum concentration of the adapted aqueous organic matter concentration is between 200 and 600 mg/L.
7. The method according to claim 1, wherein COD achieves the best removal effect when the amount of the activated and domesticated halophilic bacteria liquid is 6-10 g per ton of water, and COD achieves the best removal effect when the reaction time is 12-14 hours.
8. The method according to claim 1 or 7, wherein the high-salt low-concentration organic wastewater has a salt content of 20 to 30% and a COD concentration of 500 mg/L; the COD reaches the best removal effect when the amount of the activated and domesticated halophilic bacteria liquid is 6g per ton of water, and the COD reaches the best removal effect when the reaction time is 12 hours.
9. The method according to any one of claims 1 to 8, wherein the halophilic bacteria strain has a synergistic degradation effect on cyclic, phenylcyclic and complex chain molecular organic substances, and the degradation effect has a good removal effect on salt content of 15-30%.
10. The method according to any one of claims 1 to 9, wherein the mechanism of the halophilic bacteria strain for removing organic matter from the high-salinity low-concentration organic wastewater comprises:
the halobacter (Hbt. jilantaiense, hap. paucihalophilus) has good removal effect on organic matters such as aromatic hydrocarbon, aliphatic hydrocarbon and the like; the optimal adaptation salinity environment of the strain is between 20 and 30 percent;
haloform II (Hbf. lacisalaris, Hbf. nitireducens) and haloform (Hcc. dombrowskii, Hcc. thailalandensis, Hcc. qingdaonensis) have a synergistic removal effect on benzene ring substances and benzophenone substances, and can have a good degradation effect on the substances in an environment with salt content of 15-25%;
the halobios, the halophilic bacillus and the salinophilic rhodobacter have good degradation effects on aromatic hydrocarbon organic matters and hydroxyl-containing substances in a salt environment with 20-30% of salt.
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