Solid bacterial fertilizer for remedying petroleum polluted saline alkali soil and preparation method of solid bacterial fertilizer

Abstract

The invention discloses a solid bacterial fertilizer for remedying petroleum polluted saline alkali soil. The solid bacterial fertilizer consists of a flora mixed liquid, a high-salt beef extract peptone crude oil culture medium and a solid medium, wherein the flora mixed liquid consists of mixed bacillus, paenibacillus, bacillus coagulans, bacillus licheniformis and enterobacter; the flora mixed liquid is inoculated in the high-salt beef extract peptone crude oil culture medium for culture and enrichment; the solid medium consists of high pressure sterilized wheat bran and saw dust. The solid bacterial fertilizer has the advantages of simple preparation and easiness in obtaining of materials; when petroleum polluted saline alkali soil is remedied by using the solid bacterial fertilizer, the treatment cost is low, the ventilation property and the nutrition condition of soil can be improved, the secondary pollution to environment is prevented, and the degradation efficiency of petroleum hydrocarbon in saline alkali soil can be remarkably improved; after 60 days of remediation period, the salt content of soil is 6.1g / kg, and the petroleum degradation rate under the high salt condition can be up to 46.0%.

Description

technical field [0001] The invention relates to oil-contaminated soil remediation, in particular to a solid bacterial fertilizer for remediating oil-polluted saline-alkali soil and a preparation method thereof. Background technique [0002] With the development of my country's petroleum industry, due to the large-scale exploration, development, smelting, transportation and use of petroleum, accidents such as pollution, omission, blowout, oil pipeline leakage and other accidents occur frequently, the area of ​​oil-contaminated land continues to expand, and its pollution level is also increasing. getting worse. [0003] Petroleum substances are difficult to remove after entering the soil, and have a significant impact on plants, animals, and microorganisms in the soil, and can eventually endanger human health through the food chain. At the same time, the salt content in the soil of many onshore oil fields in my country, especially in the northern regions, is relatively high. ...

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Problems solved by technology

[0030] The purpose of the present invention is to solve the pollution problem of petroleum and saline-alkali dual stress urgently for oil-polluted saline-alkali soil, and to provide a solid bacterial fertilizer and a preparation method for repairing oil-polluted saline-alkali soil. It can survive in highly salinized soil with a salt content of 6.1g / kg and oil content of 5000mg / kg, and has a degradation ability of up to 46.0% for the oil-polluted saline-alkali soil

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