A method of treating deep-sea oil spills with porous zirconia as a carrier to attach and grow high-efficiency oil-reducing bacteria agent

Abstract

The invention provides a method for treating deep sea spilled oil by sticking growth high-efficiency oil reducing bactericide on a carrier (porous zirconium oxide). The method is characterized in that (1) the diameter of a cylindrical porous zirconium oxide carrier is 1.65cm to 1.75cm, the height of the cylindrical porous zirconium oxide carrier is 1.35cm to 1.45cm, the porosity is 55 to 65 percent, the volume density is 2.35 g / cm<3> to 2.45g / cm<3>, the aperture distribution is in a micrometer scale, and the bacteria carrying quantity of the carrier can reach 1.1*10<8> to 1.2*10<8> cfu; (2) the pressure resistance is good, and the pressure of less than 0.4MPa can be born. After the growth bactericide is stuck on the porous zirconium oxide carrier, about 9 to 10 porous zirconium oxides are loaded by utilizing 1350 to 1400 square nets with aperture of about 1cm and the edge length of about 20cm, then the square nets are arranged in a large-sized trawl net with buoys and bond to the bottom, then the large-sized trawl net is transported by a ship and placed into bottom sediments of a deep sea spilled oil polluted sea area with depth of 40 meters, and the degradation of the bactericide for petroleum hydrocarbons in the sediments and the reutilization of the porous zirconium oxide can be effectively realized.

Description

technical field [0001] The invention belongs to the technical field of deep-sea oil spill bioremediation, and in particular relates to a method for treating deep-sea oil spill by using porous zirconia as a carrier to attach and grow high-efficiency oil-reducing bacteria agents. Background technique [0002] With the world's increasing demand for oil and its products, oil spill accidents in the process of offshore mining, transportation, loading and unloading, and oil use are also increasing, causing serious environmental pollution. Accidents such as crude oil spills at sea have seriously affected the ecological environment of my country's coastal waters, and the measures taken in the treatment of oil spill accidents such as adding oil dispersants are to transfer the oil slick on the ocean surface to marine sediments. It cannot completely solve the harm caused by marine oil spills to marine ecosystems. [0003] Microbial degradation is the main way to remove petroleum polluta...

AI Technical Summary

Problems solved by technology

For example, peat, filler, activated carbon, coke powder, and zeolite carriers are not easy to sink into the seabed and contact with polluted sediments due to their low density, low compressive strength, and low mechanical strength, and it is even more difficult to withstand seabed pressure and water impact.

The fine quartz sand carrier particles are small and easily washed away by the waves. Although the vermiculite carrier can carry the bacterial agent after the volume expands, the density becomes smaller and it is difficult to meet the requirements.

Even if a lot of financial and material resources are spent, due to the special environment of the seabed, the high-efficiency oil-degrading bacteria loaded on these carriers are easily washed away and difficult to enter and fix in the sediment, resulting in microbial contamination in the sediment. Less content, which weakens the ability of microorganisms to degrade petroleum hydrocarbons in sediments

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