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Method for preparing soil conditioner by utilizing sediments in plateau lake

A soil conditioner and sediment technology, which is applied in the field of lake sediment reuse, can solve the problems of secondary pollution, difficult problems, and waste of resources in the stacking area, achieve slow release effect, improve nutrient utilization rate, and realize waste utilization. Effect

Inactive Publication Date: 2021-12-28
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For clearing the lake sediments at the bottom of the lake, the disposal methods in the prior art are generally simple stacking and natural drying. On the one hand, it requires a large amount of storage space, and the natural drying usually lasts for a long time. In the case of limited land area, it often causes On the other hand, the stacking process may also cause secondary pollution to the stacking area. Therefore, finding a reasonable lake sediment treatment method has always been a difficult problem in lake bottom dredging projects.

Method used

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  • Method for preparing soil conditioner by utilizing sediments in plateau lake
  • Method for preparing soil conditioner by utilizing sediments in plateau lake
  • Method for preparing soil conditioner by utilizing sediments in plateau lake

Examples

Experimental program
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Effect test

Embodiment 1

[0027] According to the mass ratio of 10:3:3:2, take plateau lake sediments and straw powder (corn straw is dried to a moisture content of less than 10% and then pulverized through a 100-mesh sieve), livestock manure (pig manure), and activated carbon. In a microwave environment, 1000W, 150 DEG C of microwave treatment for 20min, dehydrated to a moisture content of 50% to obtain a mixture.

[0028] Mixtures and microbial inoculants (20 parts of Bacillus subtilis, 15 parts of Bacillus lateralis, 10 parts of photosynthetic bacteria, 5 parts of nitrifying bacteria, 5 parts of nitrogen-fixing bacteria, 10 parts of total strains 8 cfu / g) are mixed according to the mass ratio of 200:0.5, and then aerobic compost fermentation is carried out to obtain a fermentation product, the fermentation process temperature is 35-45° C., and the fermentation time is 4 days.

[0029] After the fermentation product is freeze-dried in a low temperature vacuum, a heavy metal chelating agent (commercia...

Embodiment 2

[0031] According to the mass ratio of 5:5:8:5, take the plateau lake sediment and straw powder (the corn straw is dried to a moisture content of less than 10% and then pulverized through a 100-mesh sieve), livestock manure (pig manure), and activated carbon. In the microwave environment, 500W, 200 DEG C of microwave treatment for 10min, dehydrated to a moisture content of 75% to obtain a mixture.

[0032] Mixtures and microbial inoculants (10 parts of Bacillus subtilis, 20 parts of Bacillus lateralis, 5 parts of photosynthetic bacteria, 3 parts of nitrifying bacteria, 3 parts of nitrogen-fixing bacteria, the total amount of bacteria is 10 8 cfu / g) are mixed according to a mass ratio of 300:1, and then aerobic compost fermentation is carried out to obtain a fermentation product, the fermentation process temperature is 35-45° C., and the fermentation time is 3 days.

[0033] After the fermentation product is subjected to low temperature vacuum freeze drying, the heavy metal chel...

Embodiment 3

[0035] According to the mass ratio of 10:3:3:2, take plateau lake sediment and straw powder (corn straw is dried to a moisture content of less than 10% and then pulverized through a 100-mesh sieve), livestock manure (pig manure), and activated carbon. In a microwave environment, 1000W, 150 DEG C of microwave treatment for 20min, dehydrated to a moisture content of 50% to obtain a mixture.

[0036] Mixtures and microbial inoculants (20 parts of Bacillus subtilis, 15 parts of Bacillus lateralis, 10 parts of photosynthetic bacteria, 5 parts of nitrifying bacteria, 5 parts of nitrogen-fixing bacteria, 10 parts of total strains 8 cfu / g) are mixed according to the mass ratio of 200:0.5, and then aerobic compost fermentation is carried out to obtain a fermentation product, the fermentation process temperature is 35-45° C., and the fermentation time is 4 days.

[0037] After the fermentation product is freeze-dried in a low temperature vacuum, a heavy metal chelating agent (commercial...

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Abstract

The invention relates to the technical field of lake sediment recycling, in particular to a method for preparing a soil conditioner by utilizing sediments in a plateau lake. The method specifically comprises the following steps: uniformly mixing the plateau lake sediments, straw powder, livestock manure and activated carbon, performing microwave heating pretreatment to obtain a mixture, adding a microbial agent, performing compost fermentation treatment, and conducting drying to obtain a fermentation product; and uniformly mixing the fermentation product and a heavy metal chelating agent to obtain the soil conditioner. The plateau lake sediments are subjected to microbial fermentation treatment and then used for preparing the soil conditioner, so nutritive salt and organic matter components in the lake sediments are fully utilized, and waste utilization is achieved.

Description

technical field [0001] The invention relates to the technical field of lake sediment reuse, in particular to a method for preparing a soil conditioner by utilizing plateau lake sediments. Background technique [0002] As the main carrier of surface and atmospheric sediments, lake sediment accumulates a large amount of nutrients, organic matter and other substances, and is an important reservoir for various nutrients. Regular removal of sediments at the bottom of the lake can prevent the reverse release of material components in the lake sediments, avoid eutrophication of the water body and the secondary release of pollutants, restore the ecosystem of the water body, and improve the water quality. [0003] For the removal of lake sediments at the bottom of the lake, the disposal methods in the prior art are generally simple stacking and natural drying. On the one hand, it requires a large number of stacking sites, and natural drying usually lasts for a long time, which often ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C05G3/40C05G3/80C05G3/90C05F17/50C05F17/20C09K17/40C09K101/00
CPCC05F3/00C05F17/20C05F17/50C05G3/00C05G3/40C05G3/80C05G3/90C09K17/40C09K2101/00C05F7/00C05F11/00C05F11/08Y02W30/40
Inventor 张珍明张家春罗文敏贺红早刘盈盈牟桂婷吴先亮
Owner GUIZHOU UNIV
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