Method for preparing constructed wetland substrate from cornstalks

A technology of artificial wetlands and corn stalks, applied in the field of environmental ecology, can solve the problems of no resource utilization, low resource utilization rate, and difficulty in popularization and application, and achieve the effects of low cost, long service life, and strong operability
CN108569768AActive Publication Date: 2018-09-25NORTHEAST NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NORTHEAST NORMAL UNIVERSITY
Publication Date
2018-09-25

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Abstract

The invention discloses a method for preparing constructed wetland substrate from cornstalks. The method includes steps of airing, crushing, carbonizing, low-temperature activating, substrate mixing and substrate block preparation. Harvested cornstalks are defoliated and aired until the moisture content reaches 15%, skin and stalks are separated and crushed into different specifications prior to carbonizing, then soaking in water and low-temperature activation are performed, and coarse sand in particle size of 0.5-1mm is added into activated stalk based activated carbon to obtain substrate blocks. The substrate blocks are used for constructed wetland, and straw skin based activated carbon is placed at the top of the constructed wetland. The prepared constructed wetland substrate is renewable and effective in domestic sewage purification, and waste substrate can be used for organic fertilizer preparation after a use cycle ends, so that high recycling rate is realized.
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Description

technical field

[0001] The invention relates to the technical field of environmental ecology in environmental science and engineering, in particular to a method for preparing artificial wetland matrix from corn stalks. Background technique

[0002] With the development of our country's economy and the improvement of the level of urbanization, the amount of domestic sewage produced in our country's cities is large, which is increasing year by year. The cost of purifying domestic sewage by industrial methods is high, and it is difficult to treat the purified sludge, which not only pollutes the environment, but also has high treatment costs. Constructed wetlands achieve efficient purification of domestic sewage through substrate absorption, plant adsorption, and microbial decomposition, while producing certain landscape effects. Constructed wetlands have a low cost of treating domestic sewage, and at the same time generate biomass energy, effectively utilizing nitrogen and pho...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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