Method for preparing organic fertilizer from coal-based solid waste

An organic fertilizer, coal-based technology, applied in the direction of fertilizer mixture, bio-organic part treatment, nitrogen fertilizer, etc., can solve the problems of polluting fragile environment, high maintenance cost of gangue dump, high cost enterprises, etc.

Inactive Publication Date: 2021-06-01
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly the following problems: 1) The main treatment method of coal gangue is to pile up gangue piles, and the internal temperature of spontaneously combusted gangue piles can reach 800°C-1000°C, which will not only release a large amount of SO 2 , CO, H 2 Harmful gases such as S, while releasing a large amount of particles and fine particles, seriously pollute the air environment in mining areas and surrounding areas
2) The maintenance cost of the waste rock is high. Because the waste rock is prone to spontaneous combustion, etc., it is necessary to cover a large amount of quartz sand and other oxygen-isolated mineral powder on the waste rock, resulting in a waste of other resources
Downhole filling is the key development direction of coal gangue treatment, but limited by geological conditions, mining technology, cost and other constraints, related technologies are still in the process of exploration, especially the high cost makes it unacceptable for enterprises (Gu Lingyu, Liu Zhenying, Liu Yin. Preparation of porous ceramics and mechanical properties using coal gangue [J]. Comprehensive Utilization of Mineral Resources, 2018 (5): 135-137; Wang Kaigong, Wang Fei. Progress in alumina extraction technology from coal gangue [J]. Mineral Resources Comprehensive utilization, 2018 (5): 21-24; Liu Chenglong, Xu Aihua, Xia Jupei, etc. Process optimization and performance analysis of preparation of white carbon black from coal gangue leaching residue [J]. Fine Chemical Industry, 2019, 36(11): 2177-2184; Yuan Xiangfen, Cheng Fan, Yang Yanmei, et al. Study on Two Bacteria Treatment of High-sulfur Coal Gangue to Prepare Fertilizer[J]. Silicate Bulletin, 2014, 33(2): 302-307)
[0004] This has resulted in the problem that coal gangue resources are not only unreasonable to use, but also pollute the local fragile environment.

Method used

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  • Method for preparing organic fertilizer from coal-based solid waste
  • Method for preparing organic fertilizer from coal-based solid waste
  • Method for preparing organic fertilizer from coal-based solid waste

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Crush the coal-based solid waste to less than 1.0 mm, and then grind it until the particle size is less than 0.125 mm. Take the ground coal-based solid waste and put it in a petri dish, add and mix according to the mass ratio of 100:2-8:8-20 Nutrients and tap water were used to cultivate at room temperature for 5 days to 30 days. The cultivated coal-based solid waste is taken out, soaked in water for 4 h-8 h according to the liquid-solid mass ratio of 1:2-5, and the water extract and water-extracted solid waste are obtained after solid-liquid separation, and the leachate is placed in Cultivate in solid medium at room temperature for 2 days to 4 days, and observe the growth morphology and development of the colony. To separate the colonies obtained above, first select a certain amount of colonies with a bacteria picker and draw a line in an aseptic operating table. The line drawing method can be linear or grid. Medium to 25 o C-35 o C culture for 2 days to 6 days. Acco...

Embodiment 2

[0035] Crush the coal-based solid waste to less than 1.0 mm, and then grind it until the particle size is less than 0.125 mm. Take the ground coal-based solid waste and put it in a petri dish, add and mix according to the mass ratio of 100:2-8:8-20 Nutrients and tap water were used to cultivate at room temperature for 5 days to 30 days. The cultivated coal-based solid waste is taken out, soaked in water for 4 h-8 h according to the liquid-solid mass ratio of 1:2-5, and the water extract and water-extracted solid waste are obtained after solid-liquid separation, and the leachate is placed in Cultivate in solid medium at room temperature for 2 days to 4 days, and observe the growth morphology and development of the colony. To separate the colonies obtained above, first select a certain amount of colonies with a bacteria picker and draw a line in an aseptic operating table. The line drawing method can be linear or grid. Medium to 25 o C-35 o C culture for 2 days to 6 days. Acc...

Embodiment 3

[0037] Crush the coal-based solid waste to less than 1.0 mm, and then grind it until the particle size is less than 0.125 mm. Take the ground coal-based solid waste and put it in a petri dish, add and mix according to the mass ratio of 100:2-8:8-20 Nutrients and tap water were used to cultivate at room temperature for 5 days to 30 days. The cultivated coal-based solid waste is taken out, soaked in water for 4 h-8 h according to the liquid-solid mass ratio of 1:2-5, and the water extract and water-extracted solid waste are obtained after solid-liquid separation, and the leachate is placed in Cultivate in solid medium at room temperature for 2 days to 4 days, and observe the growth morphology and development of the colony. To separate the colonies obtained above, first select a certain amount of colonies with a bacteria picker and draw a line in an aseptic operating table. The line drawing method can be linear or grid. Medium to 25 o C-35 o C culture for 2 days to 6 days. Acc...

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Abstract

The invention relates to a method for preparing an organic fertilizer from coal-based solid waste, which comprises the following steps: pretreating coal-based solid waste until the particle size is less than 0.125 mm, uniformly mixing fine coal-based solid waste with mixed nutrient substances of sodium salt, magnesium salt, cellulose and lignin, and culturing, soaking the cultured coal-based solid waste for 4-8 h at the liquid-solid mass ratio of 1: (2-5), carrying out water extraction operation, and obtaining a water extract and water extraction solid waste after water extraction is completed; performing bacterial separation and culture on the water extract to obtain single active bacteria, uniformly mixing the water extraction solid waste, the active bacteria and water in a mass ratio of 100: (0.01-0.1): (5-15), regulating the pH value to 8.0-9.0 by using quick lime, fermenting for 15-30 days, and drying at 40 DEG C for 12 hours after fermentation to obtain the organic fertilizer, and applying the organic fertilizer to plant planting; and observing the growth state and fruit characteristics of the plant, and verifying the use effect of the organic fertilizer. The method has the characteristics that the coal-based solid waste is green and environment-friendly, a large amount of coal-based solid waste is utilized efficiently, and all components are utilized efficiently.

Description

technical field [0001] The invention relates to the technical field of coal-based solid waste comprehensive treatment, in particular to a method for preparing organic fertilizer from coal-based solid waste. Background technique [0002] As my country's basic energy and important raw material, coal will still be the main energy in the primary energy structure, accounting for about 65% of my country's overall energy consumption. However, during the mining, washing, processing and utilization of coal, a large amount of solid waste will be generated, such as coal gangue, coal chemical gasification waste, high-sulfur coal slime, fly ash and other industrial waste residues, etc., the resource utilization of these solid waste It has become a bottleneck restricting the green, healthy and sustainable development of development zones (He Li. Analysis on the comprehensive utilization of coal gangue [J]. China New Technology and New Products, 2012(6): 169-170). At present, there are ma...

Claims

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Application Information

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IPC IPC(8): C05F17/20C05G3/00C05G3/40C05G3/80
CPCC05F17/20C05G3/00C05G3/40C05G3/80C05C9/00C05D9/00C05D9/02Y02W30/40
Inventor 朱晓波巩文辉李望张传祥刘宝忠邢宝林张治国聂彦合邓小伟李利娟
Owner HENAN POLYTECHNIC UNIV
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