Preparing method of organic nutrient soil

A technology of organic nutrition and adsorbent, applied in the field of resource utilization of polluted waste, can solve the problems of sewage purification without considering the disposal of activated carbon, scientific and effective disposal, and secondary pollution of the environment, so as to increase economic income and improve fertility , the effect of high nutrient content

Active Publication Date: 2017-09-22
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0004] The conventional method of biochar treatment of sewage is to use biochar to absorb the pollutants in the sewage and then discharge the sewage up to the standard. However, in these methods, the biochar that has adsorbed the pollutants in the sewage has not been scientifically and effectively disposed of. These biochar may Form new pollutants and cause secondary pollution to the environment
For example, "Application and Preparation of Sludge Biochar in Adsorbing Organic Pollutants or Ammonia Nitrogen in Sewage" (CN 106116090 A) introduces a method of pyrolyzing sludge into biochar and then adsorbing organic matter or ammonia nitrogen in sewage. Although the goal of sewage purification is achieved, the biochar that has adsorbed pollutants has not been treated, which may cause new pollution to the environment; "Sewage Biological Treatment Device Based on Activated Carbon Application of Boiling Water" (CN204588950 U) introduces a kind of activated carbon In the process of purifying sewage in the device designed by it, the disposal of activated carbon that adsorbs pollutants is not considered at the same time as purifying sewage, which may also cause new pollution to the environment

Method used

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  • Preparing method of organic nutrient soil

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Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: the specific steps of the preparation method of this organic nutrient soil are as follows:

[0023] (1) Preparation of biochar: cut corn straw and rice straw (mass ratio 1:1) into small pieces of about 30mm, and then burn and pyrolyze them at 400°C for 5 hours in an anoxic environment to obtain biochar;

[0024] (2) After the domestic sewage is filtered through the filter, it is passed into the water inlet 1 of the device 3 equipped with four layers of adsorbent, enters the device through the valve I2, and is sprayed evenly by the spray head 4, and then passes through the rice husk 5 in turn. (filling amount accounts for 25% of the total volume of the adsorption layer), zeolite 6 (filling amount accounts for 20% of the total volume of the adsorption layer), corn straw 7 (filling amount accounts for 25% of the total volume of the adsorption layer), step (1 ) Biochar 8 (filling amount accounts for 30% of the total volume of the adsorption layer) four kinds o...

Embodiment 2

[0028] Embodiment 2: the specific steps of the preparation method of this organic nutrient soil are as follows:

[0029] (1) Preparation of biochar: After cutting the waste wood, it was burned and pyrolyzed at 600°C for 5 hours in an anoxic environment to obtain biochar;

[0030] (2) After the agricultural sewage is filtered through the filter, it enters the device equipped with four layers of adsorbents. The sewage is recycled in the device until the sewage reaches the agricultural irrigation water standard, and the adsorbents are taken out for use. The filling volume of the four adsorbents accounts for 80% of the total volume of the device, and the four layers of adsorbents are barley husks (filling volume accounts for 20% of the total volume of the adsorption layer), diatomite (filling volume accounts for 20% of the total volume of the adsorption layer), rice straw ( The filling amount accounts for 30% of the total volume of the adsorption layer), step (1) biochar (the fill...

Embodiment 3

[0033] Embodiment 3: The specific steps of the preparation method of this organic nutrient soil are as follows:

[0034](1) After the domestic sewage is filtered through the filter, it enters the device equipped with four layers of adsorbents. The sewage is recycled in the device until the sewage reaches the agricultural irrigation water standard, and the adsorbents are taken out for use. The filling volume of the four adsorbents accounts for 90% of the total volume of the device, of which the four layers of adsorbents are coarse bran (filling volume accounts for 23% of the total volume of the adsorption layer), volcanic rock (filling volume accounts for 23% of the total volume of the adsorption layer), barley straw The filling amount accounts for 25% of the total volume of the adsorption layer), commercially available biochar (the filling amount accounts for 29% of the total volume of the adsorption layer);

[0035] (2) Mix the coarse bran, barley straw, biochar, plateau red ...

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Abstract

The invention discloses a preparing method of organic nutrient soil. The method comprises the steps that life or agriculture waste water is filtered through a filter screen and enters a device which is provided with four layers of adsorbents, the waste water is subjected to cycle treatment until the waste water meets the agricultural irrigation water standard, and the adsorbents are taken out for standby application; then the adsorbents which adsorb and contain a large amount of organic pollutants are matched with minor ingredients to conduct fermentation and prepare solid nutrient materials, and the solid nutrient materials are mixed with the soil to obtain the organic nutrient soil. According to the preparing method, the organic nutrient soil easily absorbs nutrition and is good in fertility and applied to agricultural production, and the production efficiency is improved; not only is purification treatment on polluting waste achieved, but also green circulation economy of resource development and utilization on the polluting waste is formed.

Description

technical field [0001] The invention relates to a method for preparing organic nutrient soil, which belongs to the technical field of recycling polluted waste. Background technique [0002] Since the reform and opening up, my country's economy and society have developed rapidly, the population has increased rapidly, and the development of industry and agriculture has become faster and faster. The subsequent discharge of industrial wastewater, agricultural sewage, and domestic sewage has increased, and lakes, rivers, oceans, and groundwater have been polluted. It is becoming more and more serious, especially in fresh water resources. Various harmful substances in drinking water sources in many places exceed the standard, which not only seriously damages the ecological environment, but also threatens the health of local residents; Pollution, and the treatment technology that can produce certain economic and social benefits has received extensive attention. [0003] Biochar tech...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G9/10
Inventor 瞿广飞刘殿欣宁平李巍何巍伟
Owner KUNMING UNIV OF SCI & TECH
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