Organic waste recycling method and sterilization apparatus used in method

Abstract

The invention discloses an organic waste recycling method and a sterilization apparatus used in the method. The method comprises the following steps: collecting; carrying out anaerobic fermentation to obtain biogas, primary biogas residue and primary biogas slurry; carrying out secondary fermentation: adding a certain amount of biological inoculant and an auxiliary material into the primary biogas slag, modifying, and carrying out secondary fermentation to obtain secondary biogas residue and secondary biogas slurry; carrying out low temperature drying on the secondary biogas residue at 45-60DEG C, and crushing to prepare a solid organic fertilizer; processing the biogas slurry to prepare a liquid fertilizer; and depositing organic wastewater, carrying out flash evaporation, purifying through carrying out silver ion sterilization, mixing the obtained purified water with the liquid fertilizer, and carrying out field irrigation spraying. The sterilization apparatus comprises a heating tube, the heating tube is a cylinder with the bottom buckled to the arc-shaped top, the inner wall of the arc-shaped top is provided with a plurality of exhaust pipes, and the bottom is provided with a plurality of separation plates to form an S-shaped channel extending along the bottom; and the sterilization apparatus also comprises a steam generation device, wherein biogas is used to heat in order to generate steam.

Description

technical field [0001] The invention relates to the field of organic waste recycling, in particular to a method for recycling organic waste and a sterilization device for high-temperature steam sterilization of poultry manure in solid organic waste. Background technique [0002] In recent years, with the development of the livestock and poultry industry towards specialization, scale, and intensification, the discharge of organic pollutants from livestock and poultry has increased and concentrated, and the concentrated production of livestock and poultry manure has continued to increase, causing serious harm to the environment. [0003] (1) Emissions of harmful gases and greenhouse gases. There are nearly 200 kinds of harmful gases, which affect the quality of life of surrounding residents (the smell is unbearable); the annual greenhouse gas emissions of large-scale farms are more than tens of thousands of tons of CO2 equivalent. Some harmful substances in solid organic wast...

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Problems solved by technology

[0004] (2) Pollution of water bodies

[0005] (3) Contaminated soil

[0010] (1) From the technical point of view, the biogas residue, biogas slurry, and wastewater produced after anaerobic fermentation are not fully utilized, and even cause secondary pollution;

[0011] (2) Traditional organic waste treatment is usually aimed at the removal of pollutants, which consumes a lot of energy and wastes a lot of resources. Even if resource recovery is adopted, it does not proceed from the overall system point of view. The method of simply recycling waste and garbage resources combined with wastewater treatment cannot Taking into account both environmental protection and economic value;

[0012] (3) The equipment and process are not matched, the lack of systematic complete sets of equipment and standardized manufacturing quality is poor, the failure rate is high, and the long-term stable and reliable operation cannot be performed;

[0013] (4) The project construction unit only takes project construction as its profit goal, does not guarantee daily operation and management, cannot produce economic benefits, the profitability of the project is not obvious, and the owner's enthusiasm for operation is not high

[0014] Especially in the process of using biogas residues to prepare organic bio-fertilizers, it generally takes a long time to dry biogas residues, and the drying efficiency is low, which fundamentally reduces the production efficiency of organic fertilizers.

In addition, because the general drying device adopts high-temperature drying technology, most of the beneficial microorganisms in the biogas residue will be killed, thereby reducing the use effect of organic fertilizers

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