Hydrolysis method of agriculture and forestry waste mixed straw

A technology for agricultural and forestry waste and straw, applied in the agricultural field, can solve the problems of unstable compost quality, long degradation cycle of straw, and difficulty in degradation, and achieve the effects of being conducive to wide industrialization and application, no potential safety hazard, and the method is simple and easy to operate.

Active Publication Date: 2022-05-13
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is that the mixed agricultural and forestry waste straws disclosed in the prior art have low hydrolysis efficiency, which degrades the straws The cycle is long, the degradation is difficult, the quality of the compost after degradation is unstable, and the defects of serious environmental pollution during the hydrolysis process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Embodiment 1, the mixed stalk hydrolysis of rice straw and corn stalk

[0061] Step 1, weighing 5g of rice straw and 5g of corn stalk and mixing to obtain mixed straw, sending the mixed straw into an oven at 50°C for drying, and then crushing it into granules with a pulverizer;

[0062] Step 2, add the hydrolyzing agent prepared with 50mL nitric acid and 50mL phosphoric acid to the granular mixed straw obtained in step 1, the mass concentration of the hydrolyzing agent is 10%, the above-mentioned granular mixed straw and the hydrolyzing agent are heated in a ball mill tank for 25 degrees, ball milled React for 1 hour to obtain the straw hydrolyzed solid-liquid mixture;

[0063] Step 3, performing suction filtration on the hydrolyzed solid-liquid mixture of straw obtained in step 2, washing the filter cake with water until it is neutral, and then compacting to obtain a mixed straw solid of rice straw and corn straw after hydrolysis;

Embodiment 2

[0064] Embodiment 2, the mixed straw hydrolysis of rape straw and wheat straw

[0065] Step 1, weighing 5g of rape straw and 5g of wheat straw and mixing to obtain mixed straw, sending the mixed straw into an oven at 60°C for drying, and then crushing it into granules with a pulverizer;

[0066] Step 2, add the hydrolyzing agent prepared with 40mL phosphoric acid and 40mL potassium dihydrogen phosphate to the granular mixed straw obtained in step 1, the mass concentration of the hydrolyzing agent is 20%, the above-mentioned granular mixed straw and the hydrolyzing agent are heated in a ball mill tank for 50 degree, ball milling reaction for 2 hours to obtain straw hydrolyzed solid-liquid mixture;

[0067] Step 3, press-filtering the hydrolyzed solid-liquid mixture of straw obtained in step 2, washing the filter cake with water to neutrality and then compacting to obtain the mixed straw solids of rape straw and wheat straw after hydrolysis;

Embodiment 3

[0068] Embodiment 3, the mixed stalk hydrolysis of corn stalk and sweet potato vine

[0069] Step 1, weighing 8g of corn stalks and 2g of sweet potato vines and mixing to obtain mixed stalks, sending the mixed stalks into an oven at 50°C for drying, and then ball milling into granules with a ball mill;

[0070] Step 2, add the hydrolyzing agent prepared with 10mL nitric acid and 10mL potassium dihydrogen phosphate to the granular mixed straw obtained in step 1, the mass concentration of the hydrolyzing agent is 30%, the above-mentioned granular mixed straw and the hydrolyzing agent are heated in a ball mill tank for 80 degree, ball milling reaction for 1 hour to obtain straw hydrolyzed solid-liquid mixture;

[0071] Step 3: Press filter the hydrolyzed solid-liquid mixture of straw obtained in step 2, wash the filter cake until it is neutral, and then compact it to obtain the mixed straw solid matter of corn stalk and sweet potato vine after hydrolysis.

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Abstract

The invention discloses a hydrolysis method of agriculture and forestry waste mixed straws, which adopts a mixture of acid and salt as a hydrolytic agent to hydrolyze the mixed straws to obtain mixed straw solids. According to the hydrolysis method of the agriculture and forestry waste mixed straw, the straw fermentation and composting treatment period is shortened, and the working efficiency is improved; the influence of raw material types on pretreatment is effectively weakened, the sugar conversion rate in the fermentation stage is improved, the energy input in the crushing stage is reduced, and the production cost is greatly reduced; the method is simple and easy to operate, mild in condition, free of potential safety hazards and environmental pollution and beneficial to industrial wide popularization and application.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a method for hydrolyzing agricultural and forestry waste mixed straws. Background technique [0002] At the time when the "waste-free city" pilot construction is reshaping a new benchmark for comprehensive solid waste management, the organic solid waste treatment industry from agricultural and urban living sources has ushered in major benefits. Based on the above background, in-depth research on the reuse of organic solid waste was carried out. [0003] Straw refers to the by-products left after harvesting the seeds of crops after they mature, including stems, leaves, branches, tips, stalks, shells, etc. Cores, vines, seedlings, ears and residues and other residues, including farmland green feed. Straw is rich in nitrogen, phosphorus, potassium, calcium, magnesium and organic matter, and is a multi-purpose renewable biological resource. [0004] At present, the straw tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G1/00C05F11/00C05F17/10
CPCC05B7/00C05F11/00C05F17/10Y02W30/40
Inventor 陈彦逍汪鑫陈建钧洪小峰杨丽雯
Owner SICHUAN UNIV
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