A method for improving coastal saline soil

A saline soil and coastal technology, applied in land preparation methods, chemical instruments and methods, soil conditioning materials, etc., can solve the problems of energy consumption, human capital, occupied space, environmental impact, etc., achieve low price, enhance buffer capacity, The effect of strong water retention

Active Publication Date: 2017-12-22
TIANJIN LVYIN LANDSCAPE & ECOLOGY CONSTR +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main sludge treatment methods in my country are landfill and incineration, which will have different impacts on the environment.
Moreover, the use of stacking or landfilling takes up space and consumes energy, manpower, and funds

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0025] A soil improvement method, comprising the steps of:

[0026] 1. Decomposition preparation of urban domestic sewage sludge: The coastal area of ​​Tianjin has a large population density, compact urban distribution, and a large number of sewage treatment plants, which are mostly distributed in areas close to the countryside. Contact sewage plants near the saline soil area to be improved. With the help of the sludge sedimentation storage cellar before the sewage plant sludge is landfilled, the sludge is dehydrated and decomposed. According to the temperature requirements for fermentation and decomposing, the dehydrated sludge of domestic sewage is placed in the fermentation tank for natural fermentation, and stirred and turned at the right time to make the fermentation uniform, heat dissipation, dehumidification and deodorization. At room temperature 25°C, ferment for 25 days. Its fermentation tank is the sludge static tank or storage cellar of domestic sewage treatment pl...

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Abstract

The invention provides a method for improving coastal saline soil. The method utilizes domestic sewage sludge and cotton straw slag to improve coastal saline soil, wherein the domestic sewage sludge is prepared by natural fermentation for use, and the cotton straw slag is After natural air-drying, mechanically pulverize to obtain straw slag with a particle size of 5-8mm. The two are spread on the soil to be improved at a weight ratio of 5:1-8:1. Uniform, this method has obvious effects on improving coastal saline soil, and can transform moderate or severe saline soil with a salt content of 0.4%-1.38% into farmland or landscape land with economic benefits, and the yield of pasture and other crops has been greatly improved .

Description

technical field [0001] The invention belongs to the technical field of soil improvement, in particular to a method for improving coastal saline soil. Background technique [0002] Saline soil, also known as saline-alkali soil, is divided into inland saline soil and coastal saline soil. The area of ​​saline soil in the world is about 8.97×10 8 hm 2 , accounting for 6.5% of the world's total land area. The area of ​​saline-alkali land in the world is about 9.55×10 8 hm2 , there are about 9 913 ×10 4 hm 2 , accounting for about 2.1% of my country's total land area. Among them, the modern saline-alkali soil is 3.693 × 10 4 hm 2 , Residual saline-alkali soil 4 487 ×10 4 hm 2 , potential saline-alkali soil 1.733 ×104 hm 2 , can be roughly divided into five areas: coastal saline soil, Huanghuaihai Plain saline soil, Northeast Songnen Plain saline soil and alkaline soil, semi-desert land saline soil and Qingxin extremely arid desert saline soil. About 80% of the saline-a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B79/00A01B79/02C09K17/40C09K101/00C09K109/00
Inventor 王彬彬张涛田秀平卢树昌祁永梁福平范美军曹云
Owner TIANJIN LVYIN LANDSCAPE & ECOLOGY CONSTR
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