Method for disposing green plant wastes by classification for constructing saline-alkali soil body

A technology of plant waste and saline-alkali land, which is applied in the field of urban solid waste disposal and saline-alkali soil improvement, can solve the problem of high cost, achieve low raw material cost, improve the quality of urban ecological environment, and be easy to operate

Active Publication Date: 2018-10-16
上海绿地环境科技(集团)股份有限公司 +1
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AI Technical Summary

Problems solved by technology

The traditional green plant waste disposal and reuse methods mainly include composting and mulching. Now, with the deepening of the research on the development of biochar, the use of green plant waste to develop biochar has also attracted everyone's attention. Although the green plant waste to develop biochar Improve its land use value, but the use of biochar also has the disadvantage of high cost

Method used

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  • Method for disposing green plant wastes by classification for constructing saline-alkali soil body
  • Method for disposing green plant wastes by classification for constructing saline-alkali soil body
  • Method for disposing green plant wastes by classification for constructing saline-alkali soil body

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Embodiment 1

[0024] In a coastal area near the coast, a new city land was formed by artificial mud blowing. According to the construction needs, the land was greened. The area near the seawall has been planted with rows of poplar shelter forests for more than 30 years. Produces copious amounts of litter.

[0025] Step 1: Conduct on-the-spot investigation on saline-alkali land. The soil characteristics of saline-alkali land are: pH=8.7±0.23, salt content=0.32±0.078%, organic matter=7.82±0.23mg / kg, Na+=1.46g / kg, Cl-=1.74 g / kg, the texture is silt clay, and the normal underground water level is about 120cm, which belongs to medium saline soil.

[0026] Step 2: Use poplar pruning in the shelter forest, typhoon or naturally occurring litter for local utilization, and classify and dispose according to the size of poplar branches. Cut the large-diameter branches into 20-30cm per section with a saw, and smolder in a spontaneously ignited dark fire for 1 hour (at 250° C.) in an oxygen-deficient st...

Embodiment 2

[0033] Plants grown in a certain saline-alkali land generally do not grow well, and some plants even die, so the saline-alkali land needs to be improved.

[0034] Step 1: On-site survey: Considering that the plants have been planted, it is difficult to carry out a comprehensive transformation. Local improvements will be made in combination with different products of greening plant waste.

[0035] Step 2: Find a green plant waste disposal site near the saline-alkali land, and modify and improve the processing of different types of green plant waste. Wherein the large-diameter branch is cut into every section 20~30cm with a saw, and smolders with a simple and easy carbonization furnace under a state of oxygen deficiency in a spontaneously ignited dark fire for 1 hour (at 250° C.) to develop the initial product of biochar; the diameter is slightly smaller ( 3-5cm) and leaves-free branches are crushed into wood chips with a particle size greater than 2cm and a thickness of about 0...

Embodiment 3

[0042] Plants grown in a certain saline-alkali land generally do not grow well, and some plants even die. It is necessary to improve the saline-alkali land. The specific methods are as follows:

[0043] Step A, classified disposal of greening plant waste

[0044] Step 1: First, simply classify the green plant waste entering the disposal site, and then classify and dispose of different types of green plant waste;

[0045] The second step: the development of the initial biochar product: pick out the large branches, remove the redundant thin branches and leaves, and cut the branches with a diameter of more than 5cm into 30cm sections with a saw; in order to reduce costs, build a simple carbonization furnace. Carry out spontaneous smoldering in dark fire for 1 hour (at 250°C) under the condition of hypoxia; cool down for standby;

[0046] Step 3: Select branches with a diameter of 2 to 5 cm, remove excess twigs and leaves, use a slicer to crush the branches into wood chips or sti...

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Abstract

The invention relates to a method for disposing green plant wastes by classification for constructing a saline-alkali soil body. The method includes disposing different kinds of green plant wastes byclassification: conducting low temperature carbonization on branches with the diameter more than 5cm to develop primary charcoal to be used 100cm underground in the saline-alkali soil or laying a separation layer of about 30cm above the normal water level to prevent salt from rising with a capillary and utilizing the charcoal to improve the adsorption capacity of the salt at the same time; crushing branches with the diameter of 2-5cm into chips or strips, conducting aging by adding urea, conducting screening to obtain wooden chips with the particle size less than 2cm for covering a first layeron the soil surface and wooden chips with the particle size more than 2cm for covering a second layer on the soil surface; crushing branches with the diameter less than 2cm and other green plant wastes with more leaves to the diameter less than 1cm, adding different amounts of desulfurized gypsum according to the salt content of the salt-alkaline soil for oxygen-consuming composting for desalination and improvement of a saline-alkaline soil intermediate soil body. Compared with the prior art, the method can achieve the purpose of comprehensively improving the saline-alkali soil.

Description

technical field [0001] The invention relates to the fields of municipal solid waste disposal and saline-alkali soil improvement, in particular to a method for constructing saline-alkali land soil by sorting and disposing green plant waste. Background technique [0002] Due to the shortage of land resources and the weak awareness of land resource protection in our country, on the one hand, many lands are salinized or secondary salinized. On the other hand, due to the needs of urban construction and development, many saline-alkali lands are used for urban development and construction, and greening is the time for the development of these saline-alkali lands. Problems that must be solved. Especially in my country's coastal cities, on the one hand, there is a shortage of land resources. Many cities expand the urban usable area by blowing the sea to build land. This part of the land is seriously salinized and must be improved before it can be used. On the other hand, the eastern...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02
CPCA01B79/02
Inventor 方海兰金一鸣王星李鸣周建强史军鹏孙新波
Owner 上海绿地环境科技(集团)股份有限公司
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