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1. 研究目的与意义、国内外研究现状（文献综述）
In recentyears, China's economy has continued to rise and develop. Pharmaceuticalindustry, polymer industry, paint industry and production of pyromellitic acidand pyromellitic dianhydride is also expanding. However, both pyromellitic acidand pyromellitic dianhydride are produced in the production and use ofpyromellitic acid. A large amount of wastewater containing pyromellitic acid.The high concentration wastewater has high COD value, low pH value and poorbiochemical performance. Continuous wastewater treatment brings manydifficulties. Continuous wastewater treatment brings many difficulties. Atpresent, there are not many studies on the degradation of pyromellitic acid,and little is known about the mechanism and intermediates of the whole degradationprocess. A kind of bacteria which can degrade pyromellitic acid efficiently wasisolated from activated sludge. The growth and degradation characteristics ofthe bacteria were studied in order to provide a more comprehensive theoreticalbasis for the treatment of pyromellitic acid wastewater other industries aredeveloping rapidly. Pyromellitic acid and pyromellitic dianhydride containsymmetrical four carboxylic groups. Because of this special structure, manychemical reactions can take place. Therefore, it has a wide range ofapplications in the production of high-dimensional metal-organic coordinationpolymers, synthetic supramolecular polymers, synthetic polyimides,pharmaceuticals, plasticizers and so on, and its usage has been increasing withthe development of economy. the research on degradation of pyromellitic acid athome and abroad mainly focuses on physical and chemical methods. There are fewreports on the degradation of pyromellitic acid wastewater by microorganisms.No scholar has studied the use of highly efficient degradation bacteria todegrade pyromellitic acid. However, a large number of studies have shown thatmicroorganisms play a leading role in the degradation of pollutants in theaquatic environment. Therefore, the isolation of strains capable of efficientlydegrading pyromellitic acid has obvious promoting effect on improving thetreatment effect of pyromellitic acid wastewater.
2. 研究的基本内容和问题
Highly-effective PMA -degrading bacteria,PB-3, which can utilize PMA as the sole source of carbon and energy for carbonand energy. Growth was successfully isolated from activated sludge. Accordingto the 16S rRNA gene sequence analysis, combing with its physiological and biochemicalproperties, the strain was identified as Arthrobacter phenanthrenivorans
3. 研究的方法与方案
1. isolationand screening of strains with high degradation efficiency of pyromellitic acid
2. identification of strains with highdegradation efficiency of pyromellitic acid
3. growthcharacteristics of strains with high degradation efficiency of pyromelliticacid
4. 研究创新点
Because ofits unique structure and many advantages, pyromellitic acid and pyromelliticdianhydride are widely used in many industries. With the development ofeconomy, the demand for pyromellitic acid and pyromellitic dianhydride invarious industries is also increasing, resulting in the production ofpyromellitic acid and pyromellitic dianhydride is also expanding. However, inthe production of pyromellitic acid and pyromellitic dianhydride, a largeamount of pyromellitic acid wastewater will be produced. This kind of highconcentration wastewater has high COD value, low pH value and poor biochemicalperformance, which brings many problems to the follow-up wastewater treatment.
5. 研究计划与进展
the wastewater of pyromellitic acid is large and difficult to treat.
activatedsludge in wastewater treatment pool
addition ofpyromethylene tetrad to sludge
