A method for treating deep-sea oil spills with a high-efficiency pressure-loving and oil-reducing bacterial agent using porous alumina as a carrier

Abstract

The invention provides a method for using efficient barophilic oil-decreasing fungicide with porous aluminum oxide as a carrier to treat deep sea spilling oil. The porous aluminum oxide carrier is prepared by adopting a gel-casting method. The method is characterized by comprising the steps that 1, according to the cylindrical porous aluminum oxide carrier, the diameter is 1.60-1.70 cm, the height is 1.30-1.40 cm, the porosity is 52-59% and the volume density is 2.57-2.67 g / cm<3>, the pore size distribution is micron-level, and the bacterium carrying capability of the carrier can be up to 1.1*108-1.3*108 cfu / one; 3, the pressure-resistant property is good, and the pressure of 0.4 MPa or below can be borne. The efficient barophilic oil-decreasing fungicide can endure the pressure of 0.3-0.4 MPa. After the porous aluminum oxide carrier attaches to the growth fungicide, a square net with 1350-1400 holes with the hole diameter of 1 cm and the side length of about 20 cm is utilized to load about 9-10 large dragnets with buoys containing porous aluminum oxide, the dragnets are bound to the bottom of the net, are transported through a ship and put in the bottom sediment of a deep sea spilling oil polluted sea area with the depth of 30-40 meters, and degradation of the fungicide to petroleum hydrocarbons in the sediment and repeated utilization of the porous aluminum oxide can be effectively achieved.

Description

technical field [0001] The invention belongs to the technical field of bioremediation of deep-sea oil spills, and in particular relates to a method for treating deep-sea oil spills by using porous alumina as a carrier to attach and grow high-efficiency pressure-loving and 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 ...

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 easy to be washed away by sea waves. The vermiculite carrier mainly uses its cation exchange performance as an adsorbent for removing harmful substances and an ion exchange treatment agent for wastewater treatment; the layer of vermiculite carrier The small spacing is at the nanometer level, which is not conducive to the growth of microorganisms. Although the volume expansion can be carried by high-temperature heating, the bacterial agent can be loaded, but the density becomes smaller and it is difficult to meet the bacteria-carrying requirements of deep-sea crude oil treatment.

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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