Garden cultivation soil prepared from high-alkalinity river/lake mud and preparation method and application method thereof

A high-alkaline, cultivating soil technology, applied in the directions of botanical equipment and methods, applications, planting substrates, etc., to achieve the effects of good environmental and economic benefits, low heavy metal content, and convenient operation

Inactive Publication Date: 2019-01-15
GEZHOUBA ZHONGGU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the existing sludge treatment methods, there are very few dredging sludge from alkaline rivers and lakes as landscaping planting soil.

Method used

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  • Garden cultivation soil prepared from high-alkalinity river/lake mud and preparation method and application method thereof
  • Garden cultivation soil prepared from high-alkalinity river/lake mud and preparation method and application method thereof
  • Garden cultivation soil prepared from high-alkalinity river/lake mud and preparation method and application method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] like figure 2 Shown, the preparation method of garden cultivation soil of the present invention comprises the steps:

[0033] S1. Mud cake pretreatment: Air-dry the over-alkaline sludge cake indoors, crush it, pass through a 2-5mm sieve to obtain over-alkaline sludge powder, mix well and set aside.

[0034] S2. Reducing overalkaline: Add 0.1mol / L dilute hydrochloric acid solution to the overalkaline sludge powder, wherein the dosing ratio of overalkaline sludge powder to dilute hydrochloric acid solution is 1kg: 100-200mL, so that the sludge The particles fully react with hydrochloric acid for 1-2 days, and the pH of the sludge powder drops to 7.64-6.47.

[0035] The effect of hydrochloric acid dosing ratio on the pH of overalkaline sludge cake is as follows: figure 1 shown.

[0036] S3. Preparation of EM bacterial solution: add 200g brown sugar to 1.5L water, heat to boil for sterilization, put it into a fermentation bottle after cooling below 40°C, add 1g of bacte...

Embodiment 2

[0046] According to the proportioning of the raw materials of the third group in Example 1, organic materials such as peat and millet bran are mixed according to the above method, the EM bacteria liquid is sprayed, the nutrient content of the sludge matrix is ​​adjusted, and microbial fermentation is carried out. Finally, the prepared cultivation soil The test was carried out, and the results are shown in Table 1: the clay content of the silt matrix increased from 13.98% to 15.56%, the texture was loam, and the bulk density increased from 1.06g / cm 3 Reduced to 0.92g / cm3 , suitable for landscaping planting; organic matter content increased from 16.3g / kg to 41.2-46.8g / kg; total nitrogen content increased from 0.91g / kg to 1.85-2.06mg / kg, and alkaline nitrogen content increased from 58.53mg / kg to 148~161mg / kg; when the C / N of the aerobic fermentation product is too high, a state of "nitrogen starvation" will appear, which will deprive the nitrogen in the soil and affect the growth ...

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Abstract

The invention discloses garden cultivation soil prepared from high-alkalinity river / lake mud and a preparation method and application method thereof. The method comprises the following steps that a mud cake is air-dried, and crushed for preprocessing, hydrochloric acid is used to reduce the high alkalinity of the mud cake, an EM bacteria liquid is prepared, and aerobic fermentation is carried outon a mixture of a mud matrix, rice bran , peat and the EM bacteria liquid. The method is simple in operation, low in cost and convenient for industrial production, the high-alkalinity river / lake mud is treated, the cultivation soil that can be used is produced, and the economic and environmental benefits are high. The prepared cultivation soil is high in fertilizer efficiency and low in content ofheavy metal, different items of the cultivation soil reach the national technical standards, the soil can be used to cultivate different green plants, and the survival rate, growth speed and crown widths of the plants can be improved greatly.

Description

technical field [0001] The invention relates to the field of sludge resource utilization, in particular to a garden cultivation soil prepared from highly alkaline river and lake sludge, a preparation method and application thereof. Background technique [0002] In order to improve the water quality of rivers, lakes, coastal waters and other waters and ensure the normal flood and navigation capabilities of rivers, my country has carried out large-scale dredging and dredging projects on many rivers, lakes, reservoirs, bays and other waters. The sediment produced in the dredging project is usually dehydrated and stacked or landfilled. On the one hand, it occupies land resources and the capacity of urban landfills is limited. On the other hand, it may cause secondary pollution to the environment. Landfills require long-term monitoring and maintenance. [0003] River and lake dredging silt is a kind of aluminosilicate substance containing N and P elements. It has high reactivity ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G24/28A01G24/25C05G3/00
CPCA01G24/25A01G24/28C05F5/002C05G3/00C05F7/00C05F11/02C05F11/08
Inventor 余龙张章洪军匡丕桩罗壮
Owner GEZHOUBA ZHONGGU TECH CO LTD
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