Solid-state fermentation bin for kitchen waste treatment

Abstract

This utility model discloses a fermentation chamber for solid food waste treatment, including a chamber body. Several parallel aeration pipes are evenly arranged at the bottom of the chamber body. These aeration pipes are connected to a fan outlet located outside the chamber body via air ducts. A heat exchanger is installed at the fan inlet. The fan inlet is connected to an air source and a circulating air duct extending from the upper part of the chamber body via air ducts. A support grid is provided above the aeration pipes, and the support grid has several drainage holes. Above the support grid is a space for placing food waste. A leachate outlet is located on the bottom side of the chamber body, and an exhaust gas outlet is located at the top of the chamber body. After high-temperature aerobic fermentation using this fermentation chamber, due to the fermentation effect of special heat-resistant bacteria, the emission of odorous gases such as ammonia and hydrogen sulfide produced during the original room-temperature fermentation process is reduced, and the processing cycle of the fermentation chamber is shortened from the original 7-10 days to 3-7 days.

Description

Technical Field

[0001] This utility model relates to a fermentation chamber, and more particularly to a fermentation chamber for solid food waste treatment, belonging to the field of food waste treatment technology. Background Technology

[0002] Food waste refers to the waste generated in daily life, food processing, catering services, and institutional meal services. Food waste typically contains extremely high levels of moisture and organic matter, making it easily perishable. Currently, my country generates over 100 million tons of food waste annually. With the increasing trend of food waste and the nationwide implementation of waste sorting policies, public acceptance and awareness of standardized food waste treatment are growing. It is foreseeable that standardized, harmless food waste treatment production lines and processors will become increasingly standardized and gradually become standard equipment in waste management across cities and regions.

[0003] Besides containing a large amount of organic matter, food waste is also rich in nitrogen, phosphorus, potassium, calcium, and various trace elements. After proper treatment such as harmless composting, it can be transformed into fertilizer and reintroduced into the biosphere to benefit horticulture and agricultural production. However, the aerobic fermentation chambers currently used for food waste fermentation are not thorough, resulting in a moisture content of 60-70% in the treated material, which is too high. Furthermore, the processing cycle is too long, and the fermentation process also produces odors, affecting the surrounding environment and limiting the overall processing capacity of the system. Utility Model Content

[0004] This invention addresses the shortcomings of existing fermentation chambers for food waste fermentation by providing a fermentation chamber for solid food waste treatment.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A fermentation chamber for solid food waste treatment includes a chamber body. Several parallel aeration pipes are evenly arranged at the bottom of the chamber body. These aeration pipes are connected to a fan outlet located outside the chamber body via air ducts. A heat exchanger is installed at the fan inlet. The fan inlet is connected to an air source and a circulating air duct extending from the upper part of the chamber body via air ducts. A support grid is provided above the aeration pipes, and the support grid has several drainage holes. Above the support grid is a space for placing food waste. A leachate outlet is located on the bottom side of the chamber body, and an exhaust gas outlet is located at the top of the chamber body.

[0007] Preferably, the upper part of the fermentation chamber is equipped with a crane grab bucket.

[0008] Preferably, the fermentation chamber is equipped with a turning machine at the top.

[0009] Preferably, the heat exchanger is a partition wall heat exchanger.

[0010] The beneficial effects of this utility model are:

[0011] (1) This fermentation chamber uses heated air to provide hot air for the kitchen waste in the chamber. At the same time, the blower uses a mixture of fresh air and circulating air to improve the drying effect of the kitchen waste. In addition, with the fermentation effect of special high-temperature resistant fermentation bacteria, the moisture content of the fermentation chamber output is reduced to below 40%, which can be used as a resource.

[0012] (2) Using this fermentation chamber for high-temperature aerobic fermentation, combined with the fermentation of special heat-resistant bacteria, can quickly fix nitrogen and greatly preserve nutrients. The fermentation products can be used as a good organic fertilizer substrate raw material, without the need for external transportation and incineration, thus reducing pollution and carbon emissions generated by incineration.

[0013] (3) Due to the high-temperature aerobic fermentation process, the emission of odorous gases such as ammonia and hydrogen sulfide generated during the normal temperature fermentation process is reduced, and the processing cycle of the fermentation chamber is shortened. The fermentation process is shortened from the original 7-10 days to 3-7 days, which improves work efficiency and reduces the operating cost of kitchen waste treatment. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] 1. Tank body; 2. Aeration pipe; 3. Air duct; 4. Fan; 5. Heat exchanger; 6. Circulating air duct; 7. Support grid plate; 8. Leachate outlet; 9. Exhaust gas outlet; 10. Overhead grab bucket; 11. Turning machine. Detailed Implementation

[0016] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0017] A fermentation chamber for solid food waste treatment, such as Figure 1 As shown, the device includes a silo body 1. Several parallel aeration pipes 2 are evenly arranged at the bottom of the silo body 1. The aeration pipes 2 are connected to the outlet of a blower 4 located outside the silo body through air ducts 3. A heat exchanger 5 is provided at the inlet of the blower 4. The heat exchanger 5 is a partition heat exchanger. The inlet of the blower 4 is connected to an air source and a circulating air duct 6 extending from the upper part of the silo body 1 through air ducts 3. A support grid 7 is provided above the aeration pipes 2. The support grid 7 has several drainage holes. The area above the support grid 7 is used to place kitchen waste. A leachate outlet 8 is provided on the bottom side of the silo body 1. An exhaust gas outlet 9 is provided at the top of the silo body 1. A crane grab bucket 10 and a turner 11 are provided at the top of the silo body 1 for feeding and discharging kitchen waste and turning fermented materials.

[0018] The actual working process and principle of the fermentation chamber of this utility model are as follows:

[0019] After solid-liquid separation, the solid kitchen waste is crushed and then grabbed into the fermentation chamber 1 by the overhead crane grab bucket 11. An appropriate amount of aerobic fermentation agent is added to the kitchen waste, and the kitchen waste and agent are mixed evenly by the turner 11. The ratio of fresh air and circulating air in the air intake of the blower 4 is adjusted. The hot air heated by the heat exchanger 5 is supplied to the kitchen waste in the chamber through the air duct 3 and the aeration pipe 2. On the one hand, the fermentation temperature is maintained at 55-70°C, and on the other hand, sufficient oxygen is provided for the aerobic fermentation bacteria. The material is turned over every 2 hours during the fermentation process. The condensate and leachate produced during the fermentation process are drained into the bottom of the fermentation chamber through the drainage holes and discharged from the leachate outlet 9 after collection. Part of the hot air in the chamber is discharged through the circulating air duct 6 and re-enters the fermentation chamber after passing through the blower 4. Part of the exhaust gas is discharged through the exhaust gas outlet 9 at the top. After the fermentation is completed, the material is discharged through the overhead crane grab bucket 10. The moisture content of the discharged material is reduced to below 40%, which can be used as a good organic fertilizer substrate raw material.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fermentation chamber for treating solid food waste, comprising a chamber body, characterized in that, The bottom of the silo is evenly provided with several parallel aeration pipes. The aeration pipes are connected to the outlet of a blower located outside the silo through air ducts. A heat exchanger is provided at the inlet of the blower. The inlet of the blower is connected to an air source and a circulating air duct extending from the top of the silo through air ducts. A support grid is provided above the aeration pipes. The support grid has several drainage holes. Above the support grid is a space for placing kitchen waste. The bottom side of the silo has a leachate outlet, and the top of the silo has an exhaust gas outlet.

2. The fermentation chamber according to claim 1, characterized in that, The fermentation chamber is equipped with a crane grab bucket at the top.

3. The fermentation chamber according to claim 1 or 2, characterized in that, The fermentation chamber is equipped with a turning machine at the top.

4. The fermentation chamber according to claim 1 or 2, characterized in that, The heat exchanger is a partition wall type heat exchanger.

5. The fermentation chamber according to claim 3, characterized in that, The heat exchanger is a partition wall type heat exchanger.

Images