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Ecological restoration method for coastal heavy saline-alkali soil by comprehensively utilizing municipal waste

A technology for ecological restoration and saline-alkali land, applied in land preparation methods, botanical equipment and methods, applications, etc., can solve problems such as secondary pollution, save costs, increase soil permeability, and prevent the effect of groundwater level rising

Active Publication Date: 2021-01-26
天津泰达盐碱地绿化研究中心有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]Urban garden waste is also one of the main products of urban construction. In many places, it is mainly treated by incineration for power generation or directly treated as ordinary urban waste, which is likely to cause secondary pollution

Method used

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  • Ecological restoration method for coastal heavy saline-alkali soil by comprehensively utilizing municipal waste
  • Ecological restoration method for coastal heavy saline-alkali soil by comprehensively utilizing municipal waste
  • Ecological restoration method for coastal heavy saline-alkali soil by comprehensively utilizing municipal waste

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Experimental program
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Effect test

Embodiment 1

[0034] Tianjin Binhai Nangang Industrial Park is adjacent to the Bohai Sea. The soil has high salinity, shallow groundwater level, and harsh natural environment. With the development and construction of Nangang Industrial Park in recent years, ecological construction is imminent. Traditional engineering measures are limited by soil and other resources. Choose both sides of the newly built road, the construction area is 60cm below the road surface, the average salt content of the soil in the area is 25g / kg, and the groundwater level is 1.25m-1.6m.

[0035] A method for ecological restoration of coastal heavy saline-alkali land, the method comprising the steps of:

[0036] 1). Directly backfill large-volume construction waste (volume 5000cm 3 -10000cm 3 , accounting for 45%-65%; volume 800cm 3 -1000cm 3 Accounting for 20%-30%, others are larger than 1000cm 3 , and less than 5000cm 3 construction waste) at the bottom of the soil, with a backfill depth of 80cm;

[0037] 2). ...

Embodiment 2

[0044] The former site of the salt factory in Tianjin Binhai New Area Development Zone, the depth of the salt pool is 60cm-80cm, and the salt content is 31g / kg.

[0045] A method for ecological restoration of coastal heavy saline-alkali land, the method comprising the steps of:

[0046] 1). Directly backfill large-volume construction waste and large-volume garden dead branches to the bottom of the soil; the backfill depth is 100cm; the volume of large-volume construction waste is 5000cm 3 -10000cm 3 , accounting for 45%-65%; volume 800cm 3 -1000cm 3 Accounting for 20%-30%, others are larger than 1000cm 3 , and less than 5000cm 3 The volume ratio between large-volume construction waste and large-volume garden dead branches is 9:1;

[0047] 2). Backfill urban silt and garden waste in the gaps of large-volume construction waste, and the volume ratio of urban silt and garden waste is 1:1;

[0048] 3). The upper layer of large-volume construction waste is backfilled with urba...

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Abstract

The invention relates to an ecological restoration method for coastal heavy saline-alkali soil by comprehensively utilizing municipal waste. The ecological restoration method comprises the following steps of 1) backfilling large-volume construction waste into a soil bottom layer with the backfilling depth of 50 cm-100 cm; 2) backfilling urban sludge and garden waste into gaps of the large-volume construction waste; (3) backfilling the urban sludge, the garden waste and small-size construction waste into an upper layer of the large-size construction waste with the backfilling depth of 20 cm-30cm; (4) backfilling a mixture of original soil, the garden waste and construction waste powder into the uppermost layer with the backfilling depth of 30 cm-50 cm; (5) after backfilling is completed, directly planting salt-tolerant plants; and (6) when the salt content is reduced to 15 g / kg or below, planting alfalfa, and transplanting tamarix chinensis and / or amorpha fruticosa. According to the ecological restoration method, by utilizing the main urban waste characteristics, the waste is turned into wealth, and the problems of ecological restoration of the coastal heavy saline-alkali soil andurban waste treatment are solved.

Description

Technical field: [0001] The invention relates to an ecological restoration method for coastal heavy saline-alkali land, aiming at coastal heavy saline-alkali land, especially heavy saline-alkali land with sticky soil, making full use of urban construction waste, urban sludge and urban garden waste to carry out sustainable coastal heavy saline-alkali land Ecological Restoration Technology. Background technique: [0002] Urban construction and daily life produce a large amount of waste. With the rapid development of economy and society, a large amount of waste is produced. If it is not properly treated, it will cause environmental pollution on the one hand; Resources, improper handling causes waste of resources. Therefore, the waste generated during urban construction and life should be carefully classified according to its nature, so that different treatments can be carried out. Construction waste is a very common waste in the process of urban construction. The traditional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01B79/00A01G20/00A01G22/40A01G17/00
CPCA01B79/02A01B79/00A01G20/00A01G22/40A01G17/005
Inventor 贾林张金龙刘璐瑶王鹏山秘洪雷田晓明张涛
Owner 天津泰达盐碱地绿化研究中心有限公司