Method of utilizing floating bed hydroponic vegetables to annually decompose piggery biogas slurry

A technology of hydroponic vegetables and biogas slurry, which is applied in the direction of chemical instruments and methods, botany equipment and methods, applications, etc., can solve the problems of secondary pollution, high transportation costs, and inability to digest for a year, and achieve the effect of saving costs

Inactive Publication Date: 2019-07-16
ANHUI AGRICULTURAL UNIVERSITY
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Problems solved by technology

While using pig farm waste to produce biogas, it also produces a large amount of biogas residue and biogas slurry. If it is not treated in time, it will cause secondary pollution
The treatment...

Method used

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Embodiment Construction

[0023] A method for digesting pig farm biogas slurry by hydroponic vegetables in a floating bed, comprising the following steps:

[0024] (1) Construction of greenhouses: In the open space 10-15m away from the pig farm biogas pond, build multi-span greenhouses. 55m, top height 7.0m;

[0025] (2) Hydroponic system construction: Excavate a hydroponic pool of the same size in the multi-span shed. The hydroponic pool is 48-50m long, 2.3-2.5m wide, and 0.3-0.4m deep; the bottom of the pool is paved with wear-resistant blankets After it is finished, cover it with waterproof plastic cloth, place 96 to 100 floating beds in each pool, the size of the floating bed is 1.0m×1.0m, the mesh surface diameter is 2.0cm×2.0cm, and the greenhouse is equipped with thermometers, water pipes, and oxygen pumps;

[0026] (3) Preparation of biogas slurry: after anaerobic fermentation of pig farm biogas slurry, take its clear liquid and use an acidity regulator to adjust the pH of the pig farm biogas ...

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Abstract

The invention discloses a method of utilizing floating bed hydroponic vegetables to annually decompose piggery biogas slurry and aims to solve the problem of aftertreatment of the piggery biogas slurry. The method includes: building a greenhouse, setting up a hydroponic system, preparing the biogas slurry, cultivating seedlings, planting, fertilizing and managing, harvesting, replacing the biogasslurry and the like. Supply of high-quality vegetables and up-to-standard discharge of piggery wastewater are realized. Nasturtium officinale and ipomoea aquatica which are suitable for hydroponics and high in stain resistance and purifying ability are selected, nasturtium officinale is subjected to hydroponic culture from October to March of the next year, and ipomoea aquatica is subjected to hydroponic culture from April to September, and annual decomposing of the piggery biogas slurry is completed through rotation of the two kinds of vegetables. By the method, safe and high-quality vegetables can be harvested, and nutritional liquid needed for hydroponic culture and cost for purifying the biogas slurry can be saved.

Description

technical field [0001] The invention relates to the field of high-efficiency utilization of pig raising waste in the field of agricultural technology, in particular to a method for digesting pig farm biogas slurry by hydroponic vegetables on a floating bed. Background technique [0002] Watercress belongs to the cruciferous family. Watercress is a perennial aquatic vegetable. It likes a cool and humid environment. In winter, it can survive the winter safely in the open field when the temperature is around 0°C. It is rich in vitamins and minerals and has the function of purifying eutrophic water. Water spinach is resistant to water, fertilizer, and heat, and can grow at 15-40°C, but it is not cold-resistant, and the stems and leaves will die when they encounter frost. While producing biogas from pig farm waste, a large amount of biogas residue and biogas slurry is also produced. If it is not treated in time, it will cause secondary pollution. The treatment of most biogas res...

Claims

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Application Information

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IPC IPC(8): A01G31/00C02F3/32C02F103/20
CPCA01G31/00C02F3/32C02F2103/20C02F2203/006C02F2203/008
Inventor 徐文娟欧阳晓宇沈智李吕木李淼
Owner ANHUI AGRICULTURAL UNIVERSITY
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