Recently, a new type of energy greenhouse with biogas as energy source, vegetable planting and animal husbandry production was unveiled in Songcun Town, Wendeng City, Shandong Province. The first batch of biogas digesters in four demonstration greenhouses have been completed. The production method of this type of energy ecological greenhouse is to raise livestock in a greenhouse, use animal excrement as raw material to make biogas, use biogas as fuel for lighting energy, warm and fill light in winter vegetable greenhouses, and also use biogas. The biogas slurry and biogas residue from the pool are used as green environmental fertilizers to fertilize vegetables. At present, Songcun Town has already carried out demonstration and transformation of four vegetable greenhouses in Jinxi Village of this town. Each mound has a biogas tank where they raise pigs and use pig manure as raw material for biogas production. Virtuous cycle. It is understood that in the past, farmers warmed vegetable greenhouses in the winter, and they used natural light and other methods. This not only had poor results but also increased production costs. With this new type of energy greenhouse, heating and lighting can be achieved by burning biogas, warming the greenhouses and supplementing light, and burning biogas can also increase the concentration of carbon dioxide in greenhouses, which is conducive to crop growth. In addition, the use of biogas liquids and biogas residues has reduced the use of chemical fertilizers and greatly increased the green level of vegetable production. It is understood that after using this new type of greenhouse, each greenhouse can increase the income of farmers by more than 2,000 yuan a year.
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