Method and equipment for producing organic fertilizer by utilizing subcritical water to process rural-urban organic solid waste

Abstract

The invention discloses a method and equipment for producing an organic fertilizer by utilizing subcritical water to process rural-urban organic solid waste. The method is characterized in that the method is implemented by the following technical scheme that (1) carrying out separation to remove impurities in the organic solid waste, grinding the separated organic solid waste, adding auxiliary materials into the ground organic solid waste and storing the materials to be processed; (2) feeding the materials to be processed into subcritical water treatment and carrying out the treatment of subcritical water organic solid waste by adopting an intelligent control method through a plurality of main reaction kettles and buffering kettles, which are connected in parallel, so as to obtain a processed product; and (3) as required, preparing the processed product into a common organic fertilizer, a biological organic fertilizer or special organic and inorganic fertilizers used for different soil and crop conditions. In the invention, the organic solid waste is processed and is prepared into the fertilizer by the subcritical water so as to realize full-equipment production and intellectualization. The method and the equipment are energy-saving, have high efficiency and compact layout, and are environmental-friendly and safe. The fertilizer has high activity and is quick-acting and long-acting.

Description

technical field [0001] The invention relates to a technology for producing organic fertilizer by using urban and rural organic solid waste, in particular to a subcritical water treatment for urban and rural organic solid waste to produce organic fertilizer and equipment, belonging to the technical field of organic solid waste treatment and organic fertilizer production. Background technique [0002] Agricultural production and the consumption of its products produce a large amount of urban and rural organic waste, such as urban domestic sludge, kitchen waste, suburban livestock and poultry manure, and crop straw. These organic matter should be returned to the farmland in the form of fertilizer to complete the entire material cycle, but it is difficult to process due to the stench of urban sludge and livestock manure, and contains toxic and harmful substances such as antibiotics, aromatic hydrocarbons, and heavy metals, while crop straw is bulky and low in fertilizer efficienc...

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Problems solved by technology

[0005] None of the above-mentioned literatures reported a complete set of treatment process for producing organic solid waste into fertilizer through subcritical water; and in the treatment process, it is necessary to reduce costs, intelligentize treatment, and transform fertilizers into multiple uses, all of which use subcritical water treatment Problems that need to be solved in organic solid waste

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