Bioretention pond capable of removing petroleum pollutants by using efficient biological film

Abstract

The invention provides a bioretention pond capable of removing petroleum pollutants by using an efficient biological film, belonging to the field of environmental bioengineering. Aiming at the problem that the bioretention pond is poor in petroleum removal effect, the invention takes the conventional bioretention pond technology as a basis; efficient degradation microorganisms are inoculated and cultured by arranging a carrier material of the biological film at a specific bioretention area to generate a biological film system, so that effects of maintaining the long-term surviving of the microorganisms and enhancing the removal of the petroleum pollutants are achieved. The bioretention pond can be applied to storage and purification of rainwater or wash water of places such as a highway, a gas station, an automobile service factory, an oil depot and the like which have higher oil spill risk, and can reduce the damage of the petroleum pollutants to the water environment.

Description

technical field [0001] The invention relates to a bioretention pond for removing petroleum pollutants by using a high-efficiency biofilm, and belongs to the field of environmental bioengineering. Background technique [0002] Urban rainwater runoff management is of great significance to solving urban water shortages, flood disasters, non-point source pollution and other issues. How to effectively control non-point source pollution caused by urban rainwater runoff has become one of the important problems faced by urban management. . In recent years, the rainwater runoff pollution in most cities in my country has been serious, which has become the primary factor for the deterioration of urban river and lake water quality. The traditional urban drainage system design is based on the removal of rainwater as soon as possible. This design method has many disadvantages. It is one of the challenges facing urban management to explore how to manage urban stormwater runoff to meet th...

AI Technical Summary

Problems solved by technology

However, since bioretention ponds mainly rely on bioabsorption and biotransformation to remove organic matter, the removal effect on some refractory organic pollutants is limited (such as petroleum hydrocarbons, benzene pollutants)

[0004] With the continuous increase of the number of automobiles in our country, the consumption of petroleum products is also increasing year by year. Oil leakage incidents in gas stations, automobile repair shops, oil depots and highways occur from time to time, and there are relatively large amounts of oil in the rainwater and flushing water. High concentration of petroleum pollutants, unable to effectively remove these pollutants, has a great environmental risk

The biodegradation of petroleum pollutants depends on the transformation of microorganisms. In nature, the number of microorganisms that can degrade petroleum hydrocarbons is small, and the conversion efficiency is low. At the same time, there are still problems of long-term survival

[0005] Conventional bioretention ponds can effectively remove pollutants such as total suspended solids, heavy metals, N, and P in surface runoff, but are not effective in removing refractory and difficult-to-remove petroleum hydrocarbon pollutants; in addition, conventional bioretention ponds Vegetation and soil cover are often used to absorb and remove petroleum hydrocarbon pollutants. Although the efficiency is sometimes high, it depends more on vegetation and specific environmental soils, and its application range is limited.

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