Contaminated soil top layer remediation material using activated sludge as raw material and preparation method thereof

A technology of activated sludge and polluted soil, applied in the field of environmental remediation, can solve problems such as long cycle, achieve the effect of fast remediation, increase buffer performance, and enhance remediation effect

Active Publication Date: 2016-03-02
扬州红硕环境与生物工程研究有限公司
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  • Description
  • Claims
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Problems solved by technology

The biological method is favored by people because of its good effect, economical, green, clean and no secondary pollution, but the cycle required for bioremediation is longer

Method used

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  • Contaminated soil top layer remediation material using activated sludge as raw material and preparation method thereof
  • Contaminated soil top layer remediation material using activated sludge as raw material and preparation method thereof

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preparation example Construction

[0027] The above-mentioned preparation method of the contaminated soil top layer restoration material using activated sludge as raw material comprises the following steps:

[0028] (1) Mix fly ash with different particle sizes, then add the formula amount of vermiculite and mix thoroughly;

[0029] (2) Mix the mixture obtained in step (1) with the formula amount of sludge, vermicompost and buffer, add water during the mixing process, and squeeze it hard to make it fully mixed during the mixing process;

[0030] (3) Add water to the mixture obtained in step (2), keep the moisture content between 50-80%, keep the temperature between 15-40°C, and carry out fermentation treatment, and the fermentation time is 30-60 days;

[0031] (4) Grind and sieve the mixture obtained after fermentation to form a material with a particle size similar to that of loam, and finally form a contaminated soil top layer repair material with similar physical and chemical properties to mature soil.

[003...

Embodiment 1

[0034] 1 Materials and methods

[0035] 1.1 Experimental design

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Abstract

A kind of contaminated soil top repair material using activated sludge as raw material, including fly ash, activated sludge, vermicompost, buffer, vermiculite, wherein fly ash, activated sludge, vermicompost, buffer, vermiculite The weight percentages of the total weight of the raw materials are 20-40%, 35-55%, 20-40%, 0.2-10%, and 4-5%, respectively. The preparation method of the above-mentioned restoration material: (1) Mix fly ash of different particle sizes, and then add the vermiculite of the formulation amount and mix thoroughly; (2) Mix the mixture obtained in step (1) with the sludge of the formulation amount , vermicompost and buffer are mixed, and water is added during the mixing process; (3) water is added to the mixture obtained in step (2) for fermentation; (4) the fermented mixture is ground and sieved to form a Loam soils consist of materials with similar particle sizes. The product prepared by the invention has low cost, good effect and simple process, and is suitable for remediation and improvement of large-area polluted soil.

Description

technical field [0001] The invention relates to a preparation raw material and a preparation method of a contaminated soil top layer restoration material, belonging to the field of environmental restoration. Background technique [0002] Top-level restoration materials for polluted soil refer to laying 5-10cm restoration materials on the top layer of contaminated soil, planting specific plants in the restoration materials, and removing heavy metals and organic matter from the contaminated soil through the adsorption of chemical elements, microorganisms and plants in the restoration materials. passivation and removal of harmful substances, so as to achieve the purpose of remediating polluted soil. The remediation materials on the top layer of polluted soil are not only rich in water, fertilizer, gas and other factors to ensure the growth of plants, but also contain the effect of passivating the bioavailability of heavy metals in polluted soil. In the process of remediation, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/40C09K17/00B09C1/08B09C1/10C09K101/00
Inventor 高亚娟姚粉霞钱晓晴王凌玮丛玮玮钱祎
Owner 扬州红硕环境与生物工程研究有限公司
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