Method for preparing humic acid from tail vegetable through treated by wet hydrolysis and application

Abstract

The invention relates to a method for preparing humic acid from a tail vegetable treated by wet hydrolysis and application. The method includes the steps that the tail vegetable of a vegetable is crushed and the moisture content of the tail vegetable is adjusted, after a chemical catalyst is added for preimpregnation treatment, the tail vegetable is placed in a wet hydrolysis reactor and filled with saturated water vapor for wet hydrolysis treatment, pressure in the reactor is quickly released, a humic material is collected, an alkaline material is added to extract, mixed liquid of fulvic acidand the humic acid and solid residue rich in humin are obtained, after the solid residue is dried by vacuum, a dried product of the humin is obtained, an acid material is added to the mixed liquid for precipitation, solid precipitation is dried after alkaline washing to prepare the humic acid, and the liquid is dried after treated by resin to produce the fulvic acid. The method is applicable to awide range of raw materials, the product yield is high, the production process is fast, stable and pollution-free, large-scale industrial application is easily realized, and reduction, resource and harmless treatment of a large amount of tail vegetables are promoted.

Description

technical field [0001] The invention belongs to the technical field of resource utilization of tail vegetables, in particular to a method and application of wet-decomposing tail vegetables to prepare humic acid. Background technique [0002] Tail vegetables mainly refer to the unusable or discarded parts of vegetables during the production, circulation and processing links such as planting, harvesting, storage, transportation, processing, sales and consumption, as well as after the life cycle ends, including vegetable plants and their roots, stems, Leaves, flowers, fruits and other waste. With the improvement of people's living standards, the demand for quantity and quality of vegetables is gradually increasing, and the output of vegetables, the amount of clean vegetables on the market and the ratio of listing to the market are increasing year by year, resulting in an increase in the production of end vegetables in vegetable planting, distribution and processing. Packing mo...

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Problems solved by technology

[0003] Due to the characteristics of large quantity and dispersion, rich variety, large quality difference, high humidity and perishability, and strong seasonality of tail vegetables, there are management and technical constraints in the process of resource processing, which lead to relatively limited factors in the promotion and utilization of the above methods in my country. many

For example, one of the very important reasons for the low utilization rate of fertilization of tail vegetables is the slow rate of decomposition and low efficiency (it takes more than 60 days for traditional tail vegetables to be fully decomposed, and 3 to 6 months for direct return to the field method) Time), occupying land, it is difficult to meet the production demand, and it does not conform to the actual situation of our country, especially in areas with high population density and tight land resources

Therefore, although farmers have been advocating the use of decomposed tail vegetables, the reality is that after returning to the field, the tail vegetables are not only decomposed too slowly, the effect is not obvious, but also bring troubles to subsequent farming operations, and there is a risk of vegetable pests and diseases infesting and spreading. Farmers are more willing to bury tail vegetables far away

Feed has high requirements on the quality of raw materials of tail vegetables, and requires a relatively large amount of enrichment. The current status of production, collection and management of tail vegetables in my country is difficult to meet its resource utilization needs

Biogasification technology has restrictive requirements on the characteristics of vegetables, regional climate conditions, and facility scale, and there are problems such as environmental and safety potential risks in technical equipment

In short, although there are currently utilization technologies such as tail vegetable feed, fertilizer, biogas, etc., there are still problems of varying degrees in terms of operation management, treatment cycle, industrial scale expansion and breakthroughs in key technologies and equipment. Disadvantages of the characteristics of the vegetable itself, and the bottleneck of resource utilization of tail vegetables has not been effectively resolved, making it difficult to effectively promote and popularize the application on a large scale

Therefore, vegetable waste (tail vegetables) in my country is still dominated by landfill, which has become the mainstream mode of tail vegetable treatment, and the utilization rate of tail vegetables is less than 20%.

Such large-scale unusable tail vegetables not only cause serious waste of resources, but also occupy land, affect traffic, and have a negative impact on people's production and living environment. If they are not handled in time, they will also produce secondary pollution, seriously damage the environment, and waste resources. , breed bacteria and pests, bring poor sanitation problems and the potential risk of large-scale spread of pests and diseases in vegetable growing areas

Therefore, discarded tail vegetables have brought adverse effects on the regional environment, economy, and society, and have become a prominent problem restricting the green development of the vegetable industry. The management and resource utilization of tail vegetables have become problems that need to be solved urgently

[0004] Through the search, no patent publications related to the patent application of the present invention have been found

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