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Method for repairing polycyclic aromatic hydrocarbon polluted soil by using residual active sludge

A technology of polycyclic aromatic hydrocarbons and polluted soil, applied in the field of environmental biology, to achieve the effect of increasing soil fertility and accelerating nutrient cycle

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

At present, there is no literature report using this method to remediate PAH-contaminated soil

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0015] Crush the wheat straw to about 1 cm, and mix it with the remaining activated sludge and polycyclic aromatic hydrocarbon-contaminated soil at a ratio of 3:1:1 (dry weight ratio), add tap water to a water content of about 60%, and mix well. The material is piled up on the ground with the isolation layer, and the static pile rots for 15 days. Turn the material once every 3 days, so that the material is fully mixed, and the material is partially decomposed to obtain compost. The above-mentioned compost is evenly spread on the soil containing polycyclic aromatic hydrocarbons by 1200kg per mu. Deep plowing and plowing. After 50 days of treatment, the content of various polycyclic aromatic hydrocarbons in the surface soil decreased by 39-91%, such as: the content of fluorene decreased from the initial 97 μg / kg to 15 μg / kg, the content of phenanthrene decreased from 370 μg / kg to 203 μg / kg, and the content of fluoranthene decreased from 271 μg / kg decreased to 119 μg / kg, pyrene...

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Abstract

The invention relates to a combined method for repairing polycyclic aromatic hydrocarbon polluted soil and disposing residual active sludge of sewage treatment, and belongs to the technical field of environmental biology. The method mainly comprises the following steps of: mixing and composting the polycyclic aromatic hydrocarbon polluted soil, the residual active sludge and the biomass waste to obtain partial matured compost, and applying the compost to the polycyclic aromatic hydrocarbon polluted soil to repair. The method can effectively treat and dispose the residual active sludge and repair the polycyclic aromatic hydrocarbon polluted soil, and is simple in process and low in cost.

Description

technical field [0001] The invention belongs to the field of environmental biology technology, and relates to a combined method of bioremediation of polycyclic aromatic hydrocarbon-contaminated soil and residual activated sludge of a sewage treatment plant. technical background [0002] Polycyclic aromatic hydrocarbons are a general term for a large class of refractory persistent organic pollutants that widely exist in the environment. Because they have the "three causes" effects of "teratogenic, carcinogenic and mutagenic", they have attracted close attention from the environmental protection departments of various countries. The polycyclic aromatic hydrocarbons in the environment mainly come from the incomplete combustion of organic matter such as coal and petroleum, and the amount of polycyclic aromatic hydrocarbons produced is closely related to factors such as combustion temperature and technology. Production processes in coking and petrochemical industries such as oil...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/10
Inventor 白志辉韩祯王新新庄绪亮庄国强
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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