Method for preparing organic fertilizer by taking wet garbage as raw material

Abstract

The invention relates to the technical field of garbage treatment, and discloses a preparation method of an organic fertilizer by taking wet garbage as a raw material, which comprises the following steps: S1, pulverizing the wet garbage by a pulverizer, and forming slurry by a material preparation tank; S2, performing a hydrothermal oxidation reaction on the slurry through an oxidation reaction tank; S3, separating gas in the wastewater through a gas-liquid separation tank; S4, carrying out filter pressing on the wastewater by virtue of a filter press; and S5, drying the filter cake through adryer. The pulverizer disclosed by the invention is used for pulverizing wet garbage; carrying out hydrothermal oxidation reaction on the wet garbage in sequence through an oxidation reaction tank ina high-temperature and high-pressure environment; the organic matters in the wet garbage decompose humic acid, formic acid, acetic acid, lactic acid and the like and are dissolved in the wastewater, the wastewater is sequentially subjected to filter pressing and drying through the filter press and a dryer, water fertilizer and solid organic fertilizer particles are obtained, the reaction time is short, the processing efficiency is high, no foul smell exists, waste heat can be recycled, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of garbage treatment, in particular to a method for preparing organic fertilizer using wet garbage as raw material. Background technique [0002] With the continuous advancement of urbanization in our country, a large number of people enter the cities, and these people generate a large amount of garbage every day. According to the analysis of garbage components, the wet garbage in residents' homes accounts for about 60% of the total domestic garbage. These wet garbage Including wet garbage such as leftovers, melon rind and fruit stones, fish scales, eggshells, flowers and green plants, meat and bones, expired food, etc. These wet garbage are very easy to rot and rot, and produce unbearable odors. The exterior also looks extremely disgusting after two days. The main components of the odor produced by wet garbage are hydrogen sulfide, ammonia, methyl mercaptan, methylamine, methyl sulfide, etc. These gases a...

AI Technical Summary

Problems solved by technology

[0003] A Chinese patent discloses a system for producing organic fertilizer from wet garbage (Notice No. CN110723993A). This patented technology uses a garbage sorting machine to sort out metal materials in food waste, and the sorted food waste is passed through a shredder. Crushed and sent to the extrusion dehydration device, after being dehydrated by the extrusion dehydration device, the garbage lifting device is used to send it to the feed port of the degrader, and the liquid squeezed out of the extrusion dehydration device and the liquid leached from the garbage sorter flow into the liquid collector. Since the rubbish is crushed and extruded to dehydrate and deoil, the oil and salt are separated before degradation, which helps to improve biological activity and thus improve degradation efficiency, but its production cycle is long, processing efficiency is low, and it is easy to Odor is produced, and the heat waste is serious, and the production cost is high

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