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Microbial ecological regulation method for repairing petroleum polluted saline-alkali soil

A technology for saline-alkali soil and oil pollution, which is applied in the field of environmental biology and can solve the problems of high energy consumption in the heating process.

Inactive Publication Date: 2011-06-08
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (publication number: CN 1493535) discloses a method of using activated sludge to prepare activated sludge carbon. The method is to process activated sludge at 200-700°C for 0.5-2 hours to obtain activated sludge. Peat, the prepared activated sludge charcoal has better activated carbon performance, and the heating process consumes more energy
At present, the method of using activated sludge and waste biomass to regulate the microbial community structure in the soil and remediate oil-contaminated saline-alkali soil has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] The activated sludge and the crushed corn stalks are evenly mixed according to the weight ratio of 1:1, and water is added until the water content is about 70% by weight to complete the batching of the soil micro-ecological regulator.

[0013] Spread the ingredients evenly on the oil-polluted saline-alkali land at 3 tons per mu, and plow deeply. Irrigate evenly with fresh water every 7 days or so, and rainfall of more than 30 mm can also replace 1 irrigation, and deep plow once every 3 weeks or so. Before remediation, the oil content of the contaminated soil was 1370mg / kg, the salt content was 2.6%, and the pH value was 10.5; after 2 months, the oil content in the soil was 71mg / kg, the salt content was 0.44%, and the pH value was 8.0; General plants can be grown.

Embodiment 2

[0015] Mix the activated sludge, cow dung and rice husk evenly according to the weight ratio of 1:0.7:0.5, add water until the water content is about 60% by weight, and complete the batching of the soil microecological regulator.

[0016] Spread the ingredients evenly on the oil-polluted saline-alkali land at 2 tons per mu, and plow deeply. Irrigate evenly with fresh water every 10 days or so, and rainfall of more than 30 mm can also replace 1 irrigation, and deep plow once every 20 days or so. Before remediation, the oil content of the contaminated soil was 2210mg / kg, the salt content was 2.2%, and the pH value was 10.7; after 3 months, the oil content in the soil was 66mg / kg, the salt content was 0.39%, and the pH value was 8.3; General plants can be grown.

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Abstract

The invention relates to a biological repair method for petroleum polluted saline-alkali soil, and belongs to the technical field of environmental biology. According to the principle of microbial ecology, the method regulates the microbial ecological system of the soil by using active sludge and waste biomass, strengthens the biodegradation of petroleum pollution, neutralizes the alkali substances in the soil, and improves the permeability of the soil so as to fulfill the purpose of repairing the polluted soil. The method can effectively treat and dispose the residual sludge and the biomass waste, repair the petroleum polluted soil, reduce the salinization degree of the soil and improve the quality of the soil, and is simple in process and low in treatment cost.

Description

technical field [0001] The invention belongs to the field of environmental biotechnology and relates to a method for remediating oil-polluted saline-alkali soil. technical background [0002] Soil is an important material basis for human production activities and an indispensable and difficult-to-regenerate natural resource. At present, the situation of soil pollution in our country is relatively severe, and the ecological safety of agricultural products caused by soil pollution cannot be ignored. Soil acts as a sink for environmental pollution, in which toxic and harmful chemicals can be transmitted through the atmosphere, water bodies, and food chains, endangering human health. In recent years, all countries in the world, especially developed countries, have invested huge manpower, material and financial resources to carry out in-depth research on the remediation of contaminated soil and have made some progress. [0003] Remediation of polluted soil generally uses physic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/10
Inventor 白志辉王新新韩祯庄国强庄绪亮
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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