Method for reclaiming desert or desertified soil through utilizing sludge

A sludge and soil technology, applied in the direction of soil preparation, application, agricultural machinery and tools, etc., to achieve the effect of improving physical and chemical properties, easy survival and growth, and strong sealing ability

Inactive Publication Date: 2017-03-15
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Relieve the problem of difficult disposal of urban sludg

Method used

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  • Method for reclaiming desert or desertified soil through utilizing sludge
  • Method for reclaiming desert or desertified soil through utilizing sludge
  • Method for reclaiming desert or desertified soil through utilizing sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] A method of using sludge to reclaim desert or desertified soil, comprising the following steps:

[0057] (1) Trench digging:

[0058]Consider the sensitive areas or targets stipulated in the environmental impact assessment such as river channels and water sources, and select the site with relatively flat and stable terrain, avoiding quicksand and other deserts where sand and soil are easily lost, as the excavation site of the ditch; excavate the ditch with an excavator, The depth of the ditch refers to the natural root depth of the planted tree species, so that the roots can be concentrated near the sludge landfill area 3, and the width refers to the row spacing and plant spacing of the planted tree species, so that the tree species on both sides of the landfill area are suitable for growth, and the depth of the ditch is guaranteed to be 1m. within 4m, and the area covered by the ditches accounts for 10% of the desert area to be reclaimed;

[0059] (2) Sludge landfill:...

Embodiment 2

[0067] A method of using sludge to reclaim desert or desertified soil, comprising the following steps:

[0068] (1) Trench digging:

[0069] Consider the sensitive areas or targets stipulated in the environmental impact assessment such as river channels and water sources, and the site should be selected as the excavation site for the ditches where the terrain is relatively flat and stable, avoiding quicksand areas and other deserts where sand and soil are easily lost; Ditch, the depth of the ditch refers to the natural root depth of the planted tree species, so that the roots can be concentrated near the sludge landfill area 3, and the width refers to the row spacing and plant spacing of the planted tree species, so that the tree species on both sides of the landfill area are suitable for growth, and the depth of the ditch is guaranteed to be 3m , with a width of 5m, and the ditch covers 30% of the desert area to be reclaimed;

[0070] (2) Sludge landfill:

[0071] Landfill ...

Embodiment 3

[0078] A method of using sludge to reclaim desert or desertified soil, comprising the following steps:

[0079] (1) Pit area excavation:

[0080] Consider the sensitive areas or targets stipulated in the environmental impact assessment such as river channels and water sources, and the site should be selected as the excavation site for the pit area; Excavate the pit area. The depth of the pit area refers to the natural root system depth of the planted tree species, so that the root system can be concentrated near the sludge landfill area 3. The width refers to the row spacing and plant spacing of the planted tree species, so that the tree species on both sides of the landfill area are suitable for growth. The depth of the area is 0.5m, the width is 3m, and the coverage area of ​​the ditch accounts for 40% of the desertified soil area to be reclaimed;

[0081] (2) Sludge landfill:

[0082] Landfill the sludge from the sewage treatment plant in the ditch to form the sludge land...

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Abstract

The invention provides a method for reclaiming desert or desertified soil through utilizing sludge. The method comprises the following steps: digging a ditch or a pit region: digging the ditch or the pit region by guaranteeing that the depth is smaller than or equal to 3m, the width is 3m-5m and the coverage area is 10%-40% of a needed reclaiming area; backfilling the sludge: backfilling the sludge into the ditch or the pit region to form a sludge backfilling region, wherein the backfilling depth of the sludge is smaller than or equal to 3m; covering sandy soil: covering the sandy soil on the surface of the sludge, wherein the thickness of a covering layer is 10cm-30cm; and planting plants: planting the plants above and at the periphery of the sludge backfilling region to form a protection forest planting region, and enabling roots of the plants to extend toward the sludge backfilling region, so as to realize soil reclamation. The method provided by the invention adopts sludge backfilling and the desertified soil is treated by wastes; the sludge has a good water holding capacity and a good fertilizer effect; and measures that the sandy oil covers a sludge layer, suitable grass is planted on the sludge backfilling region, soil improvement is carried on the sandy soil covering layer and a surface layer of a region which is not backfilled, and the slope of the region which is not backfilled is adjusted are adopted, so that the effect of alleviating water loss and soil erosion is realized.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of environmental protection, and in particular relates to a method for reclamation of desert or desertified soil by utilizing sludge. [0003] Background technique: [0004] According to statistics, by the end of September 2015, more than 3,800 sewage treatment plants have been built in cities and counties across the country, with a sewage treatment capacity of about 162 million cubic meters per day, and more than 40 million tons of sludge with a water content of 80% per year. The treatment and disposal rate is low. With the development of social economy and urbanization, the amount of sludge is increasing. According to the forecast, the sludge output will exceed 60 million tons per year by 2020. [0005] As of 2014, the total area of ​​desertified land in the country was 2.6116 million square kilometers, accounting for 27.20% of the total land area, distributed in Beijing, Tianjin, Hebei, Shanxi, Inn...

Claims

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Application Information

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IPC IPC(8): A01B79/02
CPCA01B79/02Y02P60/20
Inventor 黄殿男谭杰傅金祥张贺凯于鹏飞赵玉君常沙徐文迪
Owner SHENYANG JIANZHU UNIVERSITY
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