84 results about "Benzopyrene" patented technology

The invention relates to the technical field of edible oil processing, and discloses high-quality special sesame oil and a preparation method thereof.The method comprises the following steps that 1, under the condition that the oxygen concentration is lower than 0.5 v%, an oil material and first edible oil are mixed and then subjected to first-stage heating and second-stage heating in sequence, and a first solid-liquid mixture is obtained; (2) carrying out first solid-liquid separation on the first solid-liquid mixture to obtain first clear oil and first oil residues; wherein the first-stage heating is carried out under negative pressure, and the second-stage heating is carried out under normal pressure; the temperature of the first-stage heating is 30-160 DEG C lower than that of the second-stage heating. The vegetable oil prepared by the method is high in nutrient substance and flavor substance content, low in benzopyrene content, low in acid value and peroxide value, less in oil smoke during cooking, short in processing time and high in aroma production efficiency and nutrient substance extraction rate; in addition, the plant oil prepared by the method does not need to be hydrated and degummed, and the phosphorus content in the plant oil is low.

The invention belongs to the technical field of food processing, and discloses a preparation method of fragrant nutritional peanut oil, which is based on a second-order squeezing process, and specifically realizes preparation of high-nutrient fragrant peanut oil through the working procedures of raw material soaking, irradiation germination, drying, crushing, pre-squeezing, puffing, solid state fermentation, steaming and frying, squeezing and the like. The obtained peanut oil has the characteristics of high extraction yield, rich nutrient substances, strong flavor, low content of harmful substances such as aflatoxin and benzopyrene, and the like.

The invention relates to a method for reducing harmful components in cigarette smoke by using food-grade cyclodextrin metal organic framework materials, which is characterized in that two food-grade cyclodextrin metal organic framework materials CD-MOFs are added into cigarette filters for reducing the harmful components in the cigarette smoke. The unique pore structure and rich hydroxyl functional sites of the gamma-cyclodextrin-KOH and the beta-cyclodextrin-KOH are utilized to efficiently adsorb various harmful components in the mainstream smoke of the cigarette. Compared with a control group without any adsorbent and a control group with only activated carbon as the adsorbent, the CD-MOFs has efficient capturing capability on harmful gases such as carbon monoxide, nitrosonicotine, ammonia gas, benzo [a] pyrene and phenol in the cigarette smoke, and can obviously reduce the cigarette hazard index. The two materials are simple in preparation process, high in cost benefit and good in chemical stability, are food-grade porous materials and have incomparable practical application potential compared with traditional non-food-grade porous materials, and an effective solution is provided for developing novel low-harm cigarette products.

The invention relates to the technical field of organic pollution treatment, in particular to a lignin grafted graphene oxide quantum dot material, a preparation method thereof and a polycyclic aromatic hydrocarbon degradation method, and the material is prepared by grafting reaction of alkaline lignin and graphene oxide quantum dots under alkaline conditions. When the strain is applied to degradation of polycyclic aromatic hydrocarbon, the strain and a Microbacterium sp.W1-2 strain with the preservation number of CGMCC (China General Microbiological Culture Collection Center) NO.35223 form a synergistic degradation system. The material can significantly promote thallus growth, enhance pollutant interface mass transfer and bioavailability, and realize efficient degradation in a dark environment without photocatalysis. Experiments show that under the condition that the initial concentration of benzo [a] pyrene is 5000g / L, by adding the material, the degradation rate within 6 hours can be increased to 651.4 g / h, which is increased by 2.9 times compared with that of a single strain; and the removal rate within 72 hours reaches 86.4%. The method has the advantages of being high in degradation efficiency, short in period, high in environmental adaptability, independent of illumination and the like, and is suitable for rapidly repairing the polycyclic aromatic hydrocarbon in the industrial wastewater.

The invention discloses a coking enterprise peripheral soil benzopyrene monitoring distribution optimization method based on a CALPUFF model, and belongs to the technical field of environmental monitoring, and the method comprises the steps: obtaining annual discharge amount and pollution source parameters of benzopyrene, inputting the CALPUFF model, and integrating meteorological, terrain and land coverage data to construct a three-dimensional meteorological element field, the atmospheric diffusion and dry-wet sedimentation process of benzopyrene is simulated to determine the pollution range; monitoring points are arranged in high-value areas around an enterprise and a factory boundary based on settlement flux distribution, the downstream of a prevailing wind direction and a soil background value area, and the benzopyrene content in soil is detected by referring to the national standard. The monitoring efficiency and the data reliability are improved by accurately simulating the pollution transmission process and the differentiated point distribution strategy, and the method is suitable for monitoring the benzopyrene pollution of the soil around the coking enterprise.

The present invention discloses a Chinese yam meat ball steaming production method which comprises the following steps: fresh Chinese yams are washed and peeled, and Chinese yam powder is prepared; cleaning and peeling fresh pork to prepare minced pork; mixing and stirring the crushed Chinese yams, the minced pork, edible salt, bruised ginger, bruised scallions, pepper powder, paprika powder, peanut oil, sesame oil, sweet potato starch and egg white to form a mixed material; and preparing the mixed material into spherical balls, putting the spherical balls into a steamer, and steaming and curing to obtain the Chinese yam meat balls. The Chinese yam meatballs are prepared by steaming and curing, and the Chinese yam meatballs are prepared by the processing method, so that the problem that cancerogenic substances benzopyrene and acrylamide are easily generated in the process of preparing the Chinese yam meatballs by high-temperature frying and are not beneficial to human health is solved, and the Chinese yam meatballs are more in line with the life concept of healthy diet pursued by modern people.

The invention discloses a Bosea thioxidans DY-5 strain and an application of the Bosea thioxidans DY-5 strain in degradation of phenanthrene and benzopyrene. The strain Bosea thioxidans DY-5 is obtained through domestication, separation and identification from petroleum-contaminated soil of Ningbo, phenanthrene and benzopyrene can be used as carbon sources, and after the strain is cultured in an inorganic salt culture solution with the initial concentration of phenanthrene and benzopyrene being 50 mg.L <-1 > and 25 mg.L <-1 > respectively for 7 days, the degradation rate of phenanthrene and benzopyrene can reach 75% or above. Therefore, the strain has good application potential in the aspect of bioremediation of polycyclic aromatic hydrocarbon.

Provided is a laccase derived from a strain of Versicolor versicolor. The present invention relates to a polypeptide comprising the mature polypeptide of the amino acid sequence of SEQ ID NO: 2. Compared to existing laccases, the polypeptide of the present invention exhibits a higher benzo[a]pyrene removal effect.

This invention discloses a benzo[a]pyrene-degrading fungus, *Nigrospora osmanthi* DL-7, for use in petroleum-contaminated soil, along with its inoculum and applications. This invention domesticated, isolated, and identified a benzo[a]pyrene-degrading strain, *Nigrospora osmanthi* DL-7, from petroleum-contaminated soil in Ningbo. DL-7 can utilize benzo[a]pyrene as a carbon source, even at an initial benzo[a]pyrene concentration of 25 mg·L⁻¹. ‑1 After culturing in an inorganic salt broth for 7 days, the pure DL-7 strain achieved a degradation rate of over 85% for benzo[a]pyrene. When prepared as a bacterial agent, the degradation rate of benzo[a]pyrene could be increased to over 90%. Therefore, this strain and its bacterial agent have good application potential in the bioremediation of polycyclic aromatic hydrocarbons.

The invention discloses a method for degrading benzo (alpha) pyrene in water by using gamma rays, belongs to the technical field of sewage treatment, and aims to solve the technical problem that the degradation efficiency and the degradation degree of the benzo (alpha) pyrene in the water by using the gamma rays in the prior art need to be further improved. An iron circulation-peroxymonosulfate composite system composed of a quaternized porous aromatic material, a sulfonated silicon-based hybrid channel material and a cross-linked beta-cyclodextrin material in a synergistic manner is constructed, and the quaternized porous aromatic material realizes stable enrichment of pollutants and peroxymonosulfate through a positive electricity interface; the sulfonated silicon-based hybrid channel material provides a continuous coordination and electron transfer environment for iron species, the cross-linked beta-cyclodextrin material performs confinement and secondary inclusion on hydrophobic pollutants and intermediates, and the sulfonated silicon-based hybrid channel material, the cross-linked beta-cyclodextrin material, the hydrophobic pollutants and the intermediates form a mutually linked reaction path in structure and function, so that construction and maintenance of a reaction micro-domain and continuous organization of the reaction path are realized, and the hydrophobic pollutants and the intermediates are subjected to continuous coordination and electron transfer. Therefore, the degradation efficiency and the cycling stability of pollutants are remarkably improved.

This invention provides a method for preparing pomegranate peel charcoal, the pomegranate peel charcoal itself, and a method for quality control thereof. The preparation method includes: drying pomegranate peel to constant weight; heat-treating the dried pomegranate peel at 180°C to 230°C for 5 to 20 minutes to obtain pomegranate peel charcoal. This method has a clear process, low energy consumption, and the obtained pomegranate peel charcoal contains less than 5 μg / kg of benzo[a]pyrene, and can enrich active ingredients such as punicalin. The quality control method includes: irradiating the sample with excitation light, collecting the light radiation signal after irradiation stops, and generating an evaluation index based on the signal. The preferred evaluation index is the initial luminescence intensity Y0, which is positively correlated with the punicalin content and antioxidant activity. By substituting the light radiation signal into a pre-established correlation model, the punicalin content and antioxidant activity of the sample can be determined. The preparation method of this invention is mild and controllable, with high safety, and the quality control method is rapid and non-destructive, making it suitable for the fields of traditional Chinese medicine decoction pieces, functional food raw materials, and dietary supplements.

The application discloses a solid-phase extraction agent and a preparation method and application thereof. Raw materials of the solid-phase extraction agent include cigar stems and shavings, and the mass ratio of the cigar stems to the shavings is 1:1-2. The above raw materials are all natural plants, and in addition to being rich in vascular systems and cellulose, the structure formed by xylem and phloem arranged in bundles and a variety of capillary pore structures make the pores rich, and the structure is provided with rich polar hydroxyl and hydrophobic aromatic functional groups. After being prepared as the solid-phase extraction agent, the structure can form pi-pi bonds and hydrogen bonds with benzo[a]pyrene, has strong adsorption capacity for the benzo[a]pyrene and high adsorption stability, and due to the rich pores, has good permeability. The speed of the benzo[a]pyrene in the solution after adsorption through the extraction column is faster, the adsorption enrichment and purification efficiency of the benzo[a]pyrene in the solution after adsorption is high, and the cost is low and the structure is green and environment-friendly.

The application discloses a benzo[a]pyrene-degrading fungus Arthrinium acutiapicum DL-5 in petroleum contaminated soil, a microbial inoculum of the Arthrinium acutiapicum DL-5 and application of the Arthrinium acutiapicum DL-5. ‑1 The benzo[a]pyrene-degrading rate of the pure Arthrinium acutiapicum DL-5 to benzo[a]pyrene can reach more than 75% after the Arthrinium acutiapicum DL-5 is cultured in an inorganic salt culture solution with an initial concentration of 25 mg / L of benzo[a]pyrene for 7 days. After the Arthrinium acutiapicum DL-5 is made into a microbial inoculum, the benzo[a]pyrene-degrading rate of the Arthrinium acutiapicum DL-5 to benzo[a]pyrene can be promoted to more than 80%, and therefore, the Arthrinium acutiapicum DL-5 and the microbial inoculum have good application potential in the bioremediation of polycyclic aromatic hydrocarbons.

The present research aims to successfully establish an acute gout mouse model, and to observe the joint and organ pathological changes of the animal and detect the joint and blood related indexes to evaluate the stability of the model, so as to make an acute gout mouse model with good stability, good repeatability, practicability and closeness to clinic, facilitate further research on the pathogenesis and pathophysiological changes of acute gout, and provide a certain basis for how to implement the protective intervention measures of acute gout. The present application induces an acute gout mouse model with good stability and repeatability, practicability and closeness to clinic through injecting aromatic oil and benzopyrene into the mouse, electric shock stimulation, lithium hydroxide stimulation, hydroxyacetic acid gavage and blue light irradiation, and the acute gout model induced by multiple factors can better simulate the characteristics of human acute gout.

The invention discloses an on-site rapid detection method and equipment for benzopyrene in soil, and the method comprises the following steps: weighing a target soil sample, adding a solvent into the target soil sample, and carrying out ultrasonic extraction on a mixture of the target soil sample and the solvent to respectively obtain first supernate; adding the first supernate into a display reagent to carry out color development reaction, so as to obtain a polymer with a first color; and carrying out color comparison on the polymer with the first color and a color developing card, and obtaining the pollution grade of benzopyrene in the target soil sample according to the concentration grade corresponding to the color of the color developing card. By means of the method, the whole process operation from soil sampling to pollution grading can be completed within 60 minutes, the detection sensitivity needs to reach the order of magnitude of 0.5 mg / kg, and the matrix interference resistance needs to meet the requirement for common soil types with the organic matter content smaller than 15%.

This invention discloses an enzyme-linked immunosorbent assay (ELISA) kit for detecting benzo[a]pyrene in edible oil, kitchen fumes, and vehicle exhaust. The kit includes: a sample reconstitution solution, an enzyme conjugate / antibody diluent, a standard / sample diluent, a benzo[a]pyrene standard, a benzo[a]pyrene-specific mouse monoclonal antibody, an enzyme conjugate, an ELISA plate coated with benzo[a]pyrene antigen, a chromogenic solution, a stop solution, and a washing solution. This invention also discloses a method for detecting benzo[a]pyrene in edible oil, kitchen fumes, and vehicle exhaust using the kit, including sample pretreatment, ELISA detection, and result processing and analysis. The sample reconstitution solution, enzyme conjugate / antibody diluent, and standard / sample diluent provided by this invention overcome the solubility problem of benzo[a]pyrene in edible oil, kitchen fumes, and vehicle exhaust while maintaining antibody sensitivity, and can also significantly improve antibody titer, thus possessing significant value for widespread application.

The invention belongs to the technical field of resource reutilization, and discloses a soil solidification and stabilization agent and application thereof and a blast furnace slag resource utilization method, the solidification and stabilization agent is prepared from blast furnace fly ash, expanded slag, sewage plant sludge and a naphthalene water reducer; the mass ratio of the blast furnace fly ash to the expanded slag to the sewage plant sludge to the naphthalene water reducer is (20-40): (20-30): (40-60): (10-15); the sewage plant sludge is the sewage plant sludge obtained in a Fenton process. According to the soil solidification stabilizer provided by the invention, through the combined action of the blast furnace fly ash, the expanded slag, the sewage plant sludge and the naphthalene water reducer, leaching of high-concentration heavy metals such as lead and cadmium, arsenic and a semi-volatile organic compound benzo (a) pyrene in soil can be effectively inhibited at the same time, so that the underground water IV-class standard is met.

The invention discloses a fermented soya bean hotpot condiment and a preparation method thereof. The fermented soya bean hotpot condiment comprises the following ingredients: nano-flavor fresh glutinous rice cake chilies, rapeseed oil, lard oil, fermented soya bean cakes, fermented soya bean particles, wheat sauce, fresh ginger, garlic, salt, monosodium glutamate, red oil bean halves, chicken essence, i + g, yeast protein and the like. The release rate of flavor substances is increased by 38%-42% through raw material pretreatment (glutinous rice cake chili enzymolysis and fermented soya bean ultrasonic extraction), fragrance slow release is achieved in combination with spice microcapsule embedding (the embedding rate is larger than or equal to 85%), and the fragrance retention time is prolonged by 2.3 times. And the generation of benzopyrene is avoided by regulating and controlling the oil temperature. According to the present invention, the oil temperature is reduced to 85 DEG C, then the yeast protein and the i + g are added, vacuum stirring is performed under the pressure of-0.08 MPa, such that the loss of the umami substance is reduced, and the probiotic addition (1 * 10 < 8 > CFU / g) and the tea polyphenol liposome are subjected to a synergistic effect so as to prolong the shelf life to 18 months (the TBARS value is reduced by 67%); multi-dimensional upgrading of flavor, nutrition and safety is realized, and functional and standardized transformation of traditional sauce is promoted.

The present invention discloses a pyrene-based viologen, a preparation method thereof, and an electrochromic device. The pyrene-based viologen comprises a compound represented by the general formula (I): #imgabs0#, wherein R is one of methyl, benzyl, methylnaphthalene, methylanthracene, methylbenzo[a]pyrene, methylpyrene, methylphenanthrene, and methylperylene. The pyrene-based viologen molecular design of the present invention forms a unique electron donor-donor-donor conjugated structure by introducing pyrene, benzyl, methylnaphthalene, methylanthracene, methylbenzo[a]pyrene, methylpyrene, methylphenanthrene, or methylperylene and utilizing the hyperconjugation effect of methylene groups. This significantly improves the optical and electrical properties of the viologen, in particular the fluorescence performance and coloring efficiency.

The application relates to application of Rhodococcus in degradation of benzene[a]pyrene in a water body and belongs to the technical field of microbial engineering. A Rhodococcus activation strain is subcultured with LB liquid culture medium, the cell concentration is adjusted, and the strain is inoculated into liquid culture medium containing benzene[a]pyrene at a volume ratio of 5%, the final concentration of benzene[a]pyrene in the culture medium is 0.5 mM; and the sample is cultured in a shaking table under the conditions that the temperature is 27 DEG C, the pH is 7.0, and the rotating speed is 180 rpm for 5 days. The Rhodococcus can grow and metabolize by taking benzene[a]pyrene as the only carbon source and energy source, and the benzene[a]pyrene can be efficiently degraded. Through systematic optimization of the degradation conditions, the optimal process parameters are determined, the degradation efficiency is obviously improved, and the application has the advantages of low cost, no secondary pollution, high degradation efficiency and the like. The application provides an efficient and environment-friendly technical scheme for biological remediation of benzene[a]pyrene pollution in a water body, and has good ecological benefits and wide application prospect.

The invention discloses separation and identification of a yeast Rhodotorula mucilaginosa DY-1 for degrading phenanthrene and benzopyrene in petroleum contaminated soil, and an application of the yeast Rhodotorula mucilaginosa DY-1 for degrading phenanthrene and benzopyrene in petroleum contaminated soil. The strain Rhodotorula mucilaginosa DY-1 is domesticated, separated and identified from petroleum-polluted soil in Ningbo City in Zhejiang Province, phenanthrene and benzopyrene can be used as carbon sources, and after the strain is cultured for 7 days in an inorganic salt culture solution with the initial concentration of phenanthrene and benzopyrene being 50 mg.L <-1 > and 25 mg.L <-1 > respectively, the degradation rate of phenanthrene and benzopyrene can reach 70% or above. Therefore, the strain has good application potential in the aspect of bioremediation of polycyclic aromatic hydrocarbon.

The application discloses a rapid detection system and method for benzene(a) pyrene in oil and fat, which comprises the following steps: taking 1-butyl-3-methyl imidazole hexafluorophosphate ion solution as a supporting electrolyte, dissolving 1-butyl-3-methyl imidazole hexafluorophosphate in N,N-dimethylformamide as a detection background reagent, taking tri-n-propylamine as a co-reagent, and taking an electrochemiluminescent body as a benzene(a) pyrene specific recognition substance, so as to form a rapid detection system for benzene(a) pyrene in oil and fat together with a working electrode, a counter electrode and a reference electrode, which can be used for detecting benzene(a) pyrene in oil and fat by using an electrochemical performance test method; and the oil and fat is dissolved in the system, and basic electrochemical performance test is carried out by using an electrochemistry-electrochemiluminescence analyzer. The system can be directly used for detecting benzene(a) pyrene in oil and fat without complicated pretreatment; the method has the advantages of fast detection speed, high accuracy of detection results and simple operation.

Lubricants with epoxide-based linkages for Heat Assisted Magnetic Recording (HAMR) are provided. Epoxide chemistry produces one such lubricant for magnetic media according to general formula (Ia): (Formula (Ia)) where Dn is –(CF2CF2CF2O)n-, R1, R2, R3, R4, R5 and R6 independently comprise single or branched non-fluorinated or fluorinated C1-C10 alkyl, C1-C10 alkoxy, benzene, naphthalene, anthracene, phenanthrene, dibenz[a,h]anthracene, pyrene or benzopyrene, with n being from 2 to 50.

This invention relates to the field of meat processing technology, and discloses a method for controlling the formation of benzo[a]pyrene in high-temperature roasted meat products and improving their quality. The method includes removing the skin and fascia of fresh meat to obtain lean meat; mincing and mixing the lean meat with fat; adding salt to obtain a basic meat paste; adding 0.6% to 0.7% by weight of calcium ascorbate to the basic meat paste and mixing thoroughly to obtain a modified meat paste; marinating the modified meat paste in a refrigerator away from light; stuffing it into sausages using natural casings; igniting a carbon source until it completely turns into white charcoal without an open flame; roasting and turning the sausages on a grill at a vertical distance from the carbon source to obtain high-temperature roasted meat products. This invention, by inhibiting lipid oxidation through calcium ascorbate, cuts off the carbon source supply for the formation of the carcinogen benzo[a]pyrene at its source, while also moderately inhibiting the Maillard reaction process. This method effectively reduces the formation of carcinogens in meat products while significantly improving the product's color and flavor, thus enhancing its overall quality.

The application belongs to the field of oil and fat deep processing, and discloses a system and a method for preparing concentrated flavor oil. The system comprises an enzymolysis device, a horizontal centrifuge, an enzymolysis liquid temporary storage tank, an embedding device, conveying equipment and a pressurized low-temperature seed frying device. The system and the method of the application obtain an enzymolysis liquid oil material body rich in concentrated flavor oil flavor precursor substances through the settings of pre-embedding, reinforced embedding and infiltration embedding, and the enzymolysis liquid oil material body is subjected to pressurized low-temperature seed frying, thereby avoiding the problem of high-temperature generation of carcinogen benzene (alpha) pyrene.

The application provides a benzopyrene immunoaffinity column and a preparation method and application thereof, and a filler of the benzopyrene immunoaffinity column comprises a solid carrier coupled with a benzopyrene monoclonal antibody. The benzopyrene monoclonal antibody in the benzopyrene immunoaffinity column is prepared by using a benzopyrene hapten-carrier protein conjugate as an immunogen, so that the antibody can specifically adsorb benzopyrene substances in petroleum chemicals, effectively improves the recovery rate of benzopyrene, reduces the interference of other impurities such as lipids, proteins and pigments in the petroleum chemicals, and improves the accuracy of benzopyrene detection.

The application provides a degradation method of polycyclic aromatic hydrocarbons in coal gangue and application thereof, and the degradation method comprises the following steps: mixing coal gangue, microbial strains with biological weathering, microbial strains for degrading polycyclic aromatic hydrocarbons, nutrients and water, and culturing, so that the degradation of polycyclic aromatic hydrocarbons in the coal gangue is completed; the polycyclic aromatic hydrocarbons include any one or a combination of at least two of naphthalene, acetylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benz[a]anthracene, chrysene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, indeno[1,2,3-c,d]pyrene, benz[a,h]anthracene and benzo[g,h,i]perylene. The degradation method of polycyclic aromatic hydrocarbons in the coal gangue provided by the application can simultaneously degrade multiple polycyclic aromatic hydrocarbons, and has good degradation effect.

The invention discloses a detoxification agent as well as a preparation method and application thereof, the preparation method comprises the following steps: (1) crushing cleaned and dried shrimp shells and / or crab shells, soaking with hydrochloric acid, centrifuging to obtain a first precipitate, and finally washing and drying the first precipitate to obtain a first dried substance; (2) performing firing, grinding, ultrasonic treatment and centrifugal treatment on the first dried substance to obtain a second precipitate, and then washing and drying the second precipitate to obtain a second dried substance; and (3) performing firing, ultrasonic treatment and centrifugal treatment on the second dried substance to obtain a third precipitate, and then washing and drying the third precipitate to obtain the detoxification agent. The detoxification agent disclosed by the invention can be used for efficiently removing harmful substances such as zearalenone and / or benzo [a] pyrene and the like.

The application discloses a circularly polarized luminescent material and a preparation method thereof, and a circularly polarized organic light-emitting diode. The circularly polarized luminescent material comprises a compound shown in a general formula (I): wherein R1 is or ; X is OTf, Cl, Br, I, TFSI or PF6; and R2 is any one of a methyl group, a phenyl group, a benzyl group, a methylnaphthalene group, a methylanthracene group, a methylbenzopyrene group, a methylpyrene group, a methylphenanthrene group and a methylperylene group. The circularly polarized luminescent material improves the circularly polarized luminescent performance of the material through the synergistic effect among a chiral binaphthyl structure, a pyridine ring and a substituent group thereof, and a supermolecular structure or a fractal structure formed.

The application provides a mixed bacterial population for degrading polycyclic aromatic hydrocarbons and application thereof, and the mixed bacterial population comprises Bacillus aryabhattai with a preservation number of CCTCC No:M 2024702, Brucella with a preservation number of CCTCC No:M 2024701 and Bacillus thuringiensis with a preservation number of CCTCC No:M 2024700. The mixed bacterial population of the application can degrade typical low, medium and high ring polycyclic aromatic hydrocarbons, and can realize all-round and efficient degradation of polycyclic aromatic hydrocarbons, and the degradation efficiency of benzo[a]pyrene (BaP) can reach 87%.