Method of preparing bio-organic fertilizer by utilizing waste residue caused in process of producing starch from cassava

Abstract

The invention discloses a method of preparing a bio-organic fertilizer by utilizing waste residue caused in process of producing starch from cassava. The method comprises the steps of: mixing the following raw materials in parts by weight: waste residue produced by cassava starch, rice mill byproduct, sweet potato rattans, straws, enzyme microorganism and brown sugar for 10-15minutes, controlling the moisture content to be 55-65%, stacking according to strips with the width of 2-3m and the height of 1.2-2m after evenly mixing, fermenting for 2 days under hypoxia or aerobic conditions, turning the stacks once every day, conducting continuous stack turning and high-temperature aerobic fermentation for 5-6 days, and controlling the temperature to be 55-75 DEG C; cooling for one day in bulk stacks, stacking into piles according to the height of 3-6m, fermenting for 20-30 days, and conducting one-time stack turning in 10-15 days; and naturally airing in bulk stacks until the moisture content is lower than 30%, to obtain the bio-organic fertilizer. The bio-organic fertilizer prepared can develop recycling economy, the production cost and environment cost of enterprises can be lowered, the quality and security of agricultural products can be improved, the soil is improved, the environment is protected, and the comprehensive benefit can be increased.

Description

technical field [0001] The invention relates to a bio-organic fertilizer, in particular to a method for preparing a bio-organic fertilizer by utilizing the waste residue of cassava processed starch. Background technique [0002] Cassava is one of the three largest potatoes in the world and is widely cultivated in tropical and subtropical regions. In the subtropical region of my country, cassava is the fifth largest crop after rice, sweet potato, sugar cane and corn. In 2008, the planting area of ​​cassava in my country reached 430,000 hectares, and the output of fresh potato reached 8.57 million tons, which is second only to tropical fruits, sugar cane and rubber. After cassava is processed into starch and alcohol, about 75% of the mass of cassava residue (about 6.42 million tons) is left behind. The quantity is very large, and it is not easy to preserve. It will turn yellow or black within 1 to 2 days (aflatoxin pollution ), often cause poisoning and frequent disease afte...

AI Technical Summary

Problems solved by technology

After cassava is processed into starch and alcohol, about 75% of the mass of cassava residue (about 6.42 million tons) is left behind. The quantity is very large, and it is not easy to preserve. It will turn yellow or black within 1 to 2 days (aflatoxin pollution ), often cause poisoning after feeding to animals, and the disease is frequent, which seriously restricts the resource utilization of cassava residues. Some cassava residues are discarded and rotted, polluting the environment and wasting resources

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