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Method for conducting ecological restoration for island bare land by using sewage sludge

A technology for sewage sludge and ecological restoration, applied in the fields of botanical equipment and methods, application, horticulture, etc., can solve the problems of high cost and insufficient fertility, and achieve the effect of reducing the amount of use, reducing the cost, and achieving remarkable fertilizer efficiency.

Inactive Publication Date: 2012-07-18
SECOND INST OF OCEANOGRAPHY MNR
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AI Technical Summary

Problems solved by technology

Since this method needs to use a large amount of high-quality foreign soil, the cost is high, and problems such as insufficient fertility are prone to follow-up

Method used

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Examples

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Embodiment 1

[0025]Example 1: First sort out the bare land of the island to be repaired, remove large stones, and level it, transport 6.0 tons of sewage sludge (water content 78%) to the island to be repaired, and dry it until the water content is 35%, crushed to 20 mesh, covering an average thickness of about 30 cm on the bare land of the island, with an area of ​​1,500 square meters, and 50 cm of backfilling soil on top of it, and then let it stand for a week. The selected backfilling soil is mellow soil, and the soil texture is required to be uniform. Sandy loamy soil is preferred, and pH neutrality is appropriate. The organic matter content in the soil is 1.5-2.0%, the nitrogen content is 60-70 mg / kg, and the phosphorus The content is 6-8 mg / kg, and the potassium content is 45-65 mg / kg; one week later, sow Bermudagrass and Bahia Grass seeds, the ratio of Bermudagrass and Bahia Grass seeds is 1:1, and the dosage is 10 g / square meters. After sowing, in order to prevent the open soil se...

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Abstract

A method for conducting ecological restoration for island bare land by using sewage sludge belongs to the technical field of environment protecting and ecological restoration and is characterized by comprising the following steps: the sewage sludge is dried in the sun, smashed, covered on the island bare land directly till the thickness of the sewage sludge ranges from 25 to 35 centimeters, and then earth removed from other places is covered till the thickness of the earth ranges from 40 to 60 centimeters; selected plants for the ecological restoration are bermuda grass and paspalum natatum, proportion of bermuda grass seeds to gaspalum natatum seeds is 1:0.8-1.3, and sowing quantity is 8-15 grams / square meter; and sun-shading, watering and fertilizing management is conducted after sowing, when emerging seedlings of crops are as long as 20 centimeters, vegetation coverage rate reaches above 98%, and the ecological restoration is finished. The method for conducting the ecological restoration for the island bare land by using the sewage sludge can reduce cost and negative effects, achieves reduction, stability, hazard-free treatment and recycling of the sewage sludge, and has a positive effect on region ecological restoration for islands.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and ecological restoration, and in particular relates to a method for ecological restoration of island bare land by using sewage sludge. Background technique [0002] Sewage sludge refers to the by-products of sewage treatment plants when purifying sewage. It is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles, and colloids. It has high water content and complex composition. It not only contains a large amount of organic matter and other nutrient elements, but also contains a large number of pathogenic microorganisms, accompanied by stench. Affected by industrial wastewater, there are often more toxic and harmful substances such as heavy metals. Improper treatment is extremely serious. It is easy to cause serious secondary pollution. At present, the amount of wet sludge produced by urban sewage treatment plants in my country...

Claims

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Application Information

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IPC IPC(8): A01G1/00
Inventor 毋瑾超谭勇华于淼
Owner SECOND INST OF OCEANOGRAPHY MNR
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