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Method for preparing fertilizer by acid treatment on agriculture wastes under high temperature and high pressure

An agricultural waste, high temperature and high pressure technology, applied in the field of agricultural waste resource recycling, can solve the problems of low utilization rate, limited economic benefit, and small environmental improvement effect, and achieve high production efficiency, strong continuity, and improved The effect of overall performance

Inactive Publication Date: 2017-11-14
江苏绿方园生物科技有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art methods for treating agricultural wastes are relatively simple, mostly by directly fermenting agricultural wastes, and the solid organic fertilizers produced are often economically beneficial because of low nutrient content, simple production technology, and fierce competition in the same industry. limited
[0004] In addition, this fermentation method can only process one or a few types of waste, and there is a problem of secondary discharge of pollutants during the treatment process
In addition, with the development of agricultural cultivation technology, the application of drip irrigation, sprinkler irrigation and other technologies is becoming more and more extensive, and it is difficult for solid organic fertilizers to adapt to such fertilization methods.
[0005] In addition, due to weather, management and other reasons, the moisture content of agricultural waste such as food factory waste, kitchen waste, and livestock and poultry manure obtained at different times is different. The traditional fermentation method is only to compost solid agricultural waste with a low moisture content. Fermentation, agricultural waste with high water content or liquid state cannot be used, and can only be discarded. The utilization rate of agricultural waste is still very low, and the improvement effect on the environment is also small
[0006] Furthermore, the traditional fermentation method has no selectivity for the obtained products, and cannot maximize the utilization of the components and characteristics of different wastes, and the reuse effect is not good
[0007] Therefore, in view of the current technical situation, there is an urgent need for technologies with better adaptability and promotion value, to break through the current barrier of only one or a few kinds of wastes being used in one way, and to improve the backward utilization technology and utilization rate of agricultural wastes. Low current situation, this not only has good practical significance and environmental protection value, is the research hotspot and the key subject in the present field, but also the driving force and foundation that the present invention can be completed

Method used

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  • Method for preparing fertilizer by acid treatment on agriculture wastes under high temperature and high pressure
  • Method for preparing fertilizer by acid treatment on agriculture wastes under high temperature and high pressure
  • Method for preparing fertilizer by acid treatment on agriculture wastes under high temperature and high pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] S1: Provide the above-mentioned fertilizer preparation device, which includes a crushing mixer, an acid reaction kettle, an acid-base adjustment tank, and a solid-liquid separator connected in sequence, and the solid-liquid separator is respectively connected to the downstream concentrator and aerobic composting workshop;

[0068] S2: adding food waste and livestock manure with a mass ratio of 1:1 to the grinding mixer for mixing and grinding to obtain waste organic matter;

[0069] S3: Add the waste organic matter into the acid reaction kettle, and add an aqueous hydrochloric acid solution with a concentration of 10% by mass (wherein, the mass ratio of HCl to the waste organic matter is 1:4), stir evenly, and start the acid reaction The still is heated and stirred (the temperature is shown in Table 1-3 below, and the pressure is 0.15MPa). After the mixture is fully reacted, the heating is stopped and the pressure is released (the reaction time is 20 minutes) to obtain ...

Embodiment 2

[0085] S1: Provide the above-mentioned fertilizer preparation device, which includes a crushing mixer, an acid reaction kettle, an acid-base adjustment tank, and a solid-liquid separator connected in sequence, and the solid-liquid separator is respectively connected to the downstream concentrator and aerobic composting workshop;

[0086] S2: adding food waste and livestock manure with a mass ratio of 1:1 to the grinding mixer for mixing and grinding to obtain waste organic matter;

[0087] S3: Add the waste organic matter into the acid reaction kettle, and add an aqueous hydrochloric acid solution with a concentration of 10% by mass (wherein, the mass ratio of HCl to the waste organic matter is 1:4), stir evenly, and start the acid reaction The kettle is heated and stirred (the temperature is 130°C, and the pressure is shown in the following table 4-6). After the mixture is fully reacted, the heating is stopped and the pressure is released (the reaction time is 20 minutes) to ...

Embodiment 3

[0103] S1: Provide the above-mentioned fertilizer preparation device, which includes a crushing mixer, an acid reaction kettle, an acid-base adjustment tank, and a solid-liquid separator connected in sequence, and the solid-liquid separator is respectively connected to the downstream concentrator and aerobic composting workshop;

[0104] S2: adding food waste and livestock manure with a mass ratio of 1:1 to the grinding mixer for mixing and grinding to obtain waste organic matter;

[0105] S3: Add the waste organic matter into the acid reaction kettle, and add an aqueous hydrochloric acid solution with a concentration of 10% by mass (wherein, the mass ratio of HCl to the waste organic matter is 1:4), stir evenly, and start the acid reaction The kettle is heated and stirred (wherein, the mass ratio of HCl to waste organic matter is 1:4), after stirring evenly, the acid reaction kettle is opened for heating and stirring (the temperature is 130°C, the pressure is 0.15MPa), and af...

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Abstract

The invention relates to a method for preparing fertilizer by acid treatment on agriculture wastes under high temperature and high pressure. The method comprises the following steps of S1: providing a fertilizer preparation device; S2: obtaining waste organic matters; S3: obtaining a pre-treated material; S4: carrying out solid-liquid separation to obtain liquid and a solid; S5: obtaining concentrated liquid fertilizer; S6: obtaining organic fertilizer. According to the method provided by the invention, the unique fertilizer preparation device and unique process steps and parameter selection of the preparation method are adopted, so that a plurality of excellent effects are obtained through a synergic effect; the concentrated liquid fertilizer and the organic fertilizer, which have an excellent effect, can be obtained, so that the method has a good application prospect and industrialized production potential in the field of utilization of agricultural waste resources.

Description

technical field [0001] The invention relates to a method for comprehensive utilization of agricultural waste, more particularly to a method for preparing fertilizer from agricultural waste with acid under high temperature and high pressure, and belongs to the technical field of resource utilization of agricultural waste. Background technique [0002] At present, in the vast rural areas of our country, there are many problems in the utilization of agricultural waste resources, such as: lack of corresponding technology and equipment; the processing technology of agricultural waste is simple and backward; the processing capacity and utilization scale are very limited and so on. Among them, the most important problem is that the existing agricultural waste utilization methods will cause environmental pollution. Most resources can only be discarded or incinerated, and the utilization rate is very low. For example, crop straw is mostly used as fuel for one-time utilization. Not on...

Claims

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Application Information

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IPC IPC(8): C05G1/00C05F15/00C05F17/00C05F17/02
CPCC05B7/00C05F3/00C05F17/00C05F17/50C05F17/90C05C9/00C05D1/02C05D9/02C05F9/00C05F5/002C05F11/00Y02W30/40
Inventor 严媛媛冯雷雨马雪莲吴文丽戴星星王青青
Owner 江苏绿方园生物科技有限公司
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