With economic growth, people's living standards continue to increase, the population increases sharply, the environment will worsen more and more, all countries are accelerating the study of environmental protection and governance methods. Bioremediation technology has rapidly become an indispensable technical support for the environmental protection industry because of its advantages of environmental protection, high efficiency, low cost and reusable resources. Its large-scale industrial revolution is now striding forward to us. However, it has the advantages of other methods, but it also has its own limitations. When it is applied, certain principles must be followed. Soil bioremediation technology, also known as biological restoration and biological remediation, is a way to harness biotechnology and methods to control soil pollution and restore its normal function. Narrow-scale soil bioremediation refers to the process of using microorganisms to degrade harmful organic pollutants in the soil into innocuous inorganic substances (C02 and H20) or other harmless substances. This technique is commonly referred to as bioremediation of soils; broad-based restoration of soil organisms involves the use of various organisms in the soil - plants, soil animals and microorganisms - to absorb, degrade and convert contaminants in the soil, reducing the concentration of contaminants To acceptable levels, or toxic to harmful pollutants into harmless substances. In the field of agricultural environment governance, bioremediation technologies that can fundamentally solve and improve problems and can recycle resources are a challenging frontier in environmental science research. Many enterprises engaged in the environmental protection industry have also invested Among them, the bioremediation technology into the development of industrialization. The principle of bioremediation technology is to utilize the ability of biological decomposition of toxic and harmful substances to treat pollutants in soil and water and purify the environment. With the increasing prominence of environmental protection, various countries have further studied various methods for environmental pollution remediation. A large number of experimental studies have proved that the use of microbial treatment to purify harmful substances is an effective method that can be applied to the treatment of large-scale pollutants. Petroleum hydrocarbon pollution is the main form of soil pollution near the oilfield. The use of microorganisms or other organisms to convert petroleum pollutants into harmless substances, low cost, wide range of applications, bioremediation technology, one of the main methods of petroleum hydrocarbon pollution control. There are many methods of bioremediation. According to the restoration environment, bioremediation can be divided into soil bioremediation, groundwater bioremediation, sediment bioremediation and marine bioremediation. Bioremediation technology has rapidly become an indispensable technical support for the environmental protection industry because of its advantages of environmental protection, high efficiency, low cost and reusable resources. Its large-scale industrial revolution is now striding forward to us. With the increase of national support, the market potential in this area will be fully tapped, and attracting more and more talents, enterprises and capital to constantly break through the bottleneck of technology so that bioremediation technology can play its role in the great development of the environmental protection industry Greater effect. Bioremediation technology has the advantages of other methods can not be compared, but also has its own limitations, mainly in the following areas. (1) Microorganisms are not capable of degrading all pollutants entering the environment, often making bioremediation impractical due to the difficult degradation of the pollutants, their insolubility and their combination with soil humus or soil. (2) The technique should be used with detailed consideration of the site of contamination and the contaminants present, as bioremediation might not be suitable for use in low-permeability soils, because such soils or wells in such soils would Clogged due to excessive bacterial growth. (3) Specific microorganisms that degrade only certain types of chemicals may not be destroyed by the same microbial enzyme. (4) This technique is greatly affected by various environmental factors because microbial activity is affected by environmental conditions such as temperature, oxygen, moisture and pH. Compared with the physical method and the chemical method, this technology has a relatively long time to pollute the soil. (5) In some cases, bioremediation can not completely remove the pollutants, and when the pollutant concentration is too low to maintain the communities degrading bacteria, the remaining pollutants will remain in the soil. The formal existence of these limitations makes soil remediation must follow certain principles: (1) Suitable microorganisms are bacteria and fungi that have physiological and metabolic capacities and can degrade contaminants. In many cases, there are degrading microorganisms present at the repair site, and exogenous microorganisms need to be added if high concentrations of toxic contaminants are to be treated in the reactor. (2) The suitable place is the place where pollutants and suitable microorganisms are in contact. For example, the degrading benzene microorganisms present in the surface soil can not degrade the benzene pollutants located in the aquifer, and only the contaminated water can be extracted Ground treatment in the above-ground bioreactor, or the introduction of suitable microorganisms into contaminated aquifers. (3) suitable environmental conditions means to control or change the environmental conditions, so that microbial metabolism and growth activities in the best condition. Environmental factors include temperature, inorganic nutrients (mainly nitrogen and phosphorus), electron acceptors (oxygen, nitrate and sulfate) and pH. Despite the diversity of bioremediation technologies and the diversity of bioremediation sites, the three principles outlined above do indeed apply to all bioremediation techniques. Filter Discs And Packs,Wire Mesh Disc,Ss Strainer Filter,Metal Filter Disc glorybest industry co.,ltd , https://www.glorybestfilter.com