A kitchen waste treatment system

Abstract

The utility model discloses a kind of kitchen waste treatment systems, including sorting device, solid-liquid separation device, wastewater treatment module, solid bunker, crusher, screw press, buffer storehouse, fermentation bin and discharge device;The discharge port of sorting device is communicated with the feed inlet of solid-liquid separation device, the liquid discharge port of solid-liquid separation device is communicated with the water inlet of wastewater treatment module, the solid discharge port of solid-liquid separation device is communicated with solid bunker, and the material stored in solid bunker is crushed by crusher, enters buffer storehouse after being treated by screw press and is temporarily stored, and the liquid outlet of crusher and screw press is communicated with the water inlet of wastewater treatment module;After using the system to treat kitchen waste, due to the air after heating used by fermentation bin provides hot air for kitchen waste in bin, so that the moisture content of fermentation product is reduced to below 40%, and can be used as usable raw material of resource.

Description

Technical Field

[0001] This utility model relates to a food waste treatment system, and more particularly to a system for the harmless and resource-based treatment of food waste, belonging to the field of solid waste treatment technology. Background Technology

[0002] Kitchen waste mainly refers to the waste generated by residents in their daily lives and in activities such as food processing, catering services, and unit catering. It includes discarded vegetable leaves, leftover food, fruit peels, eggshells, tea dregs, bones, etc. Its main sources are family kitchens, restaurants, hotels, canteens, markets, and other industries related to food processing, hence the name kitchen waste.

[0003] The current methods for handling food waste generally involve collecting the waste and then incinerating it. This process is lengthy, makes it impossible to recycle food waste, and causes serious environmental damage.

[0004] In addition to 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 in the fermentation chambers currently used for food waste fermentation is incomplete, 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

[0005] This invention addresses the shortcomings of existing food waste treatment methods by providing a food waste treatment system that can transform food waste into organic fertilizer substrate through resource recovery.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A food waste treatment system, characterized in that it includes a sorting device, a solid-liquid separation device, a wastewater treatment module, a solid material silo, a crusher, a screw press, a buffer silo, a fermentation silo, and a discharge device;

[0008] The discharge port of the sorting device is connected to the inlet of the solid-liquid separation device. The liquid discharge port of the solid-liquid separation device is connected to the inlet of the wastewater treatment module. The solid discharge port of the solid-liquid separation device is connected to the solid silo. The material stored in the solid silo is crushed by the crusher and processed by the screw press before entering the buffer silo for temporary storage. The liquid outlets of the crusher and the screw press are connected to the inlet of the wastewater treatment module.

[0009] The fermentation chamber includes a chamber body. Several parallel aeration pipes are evenly arranged at the bottom of the chamber body. The aeration pipes are connected to the outlet of a blower located outside the chamber body 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 upper part of the chamber body through air ducts. A support grid is provided above the aeration pipes. The support grid is provided with several drainage holes. The space above the support grid is for placing kitchen waste. A leachate outlet is provided on the bottom side of the chamber body. An exhaust gas outlet is provided at the top of the chamber body. A crane grab bucket and a turner are provided at the top of the chamber body.

[0010] The solid materials in the buffer silo are grabbed into the fermentation silo by the overhead crane grab bucket, and the fermentation products in the fermentation silo are grabbed into the discharge device by the overhead crane grab bucket and then discharged.

[0011] Preferably, the sorting device is a conveyor belt that disperses and transports kitchen waste.

[0012] Preferably, the wastewater treatment module includes a raw water tank, a primary equalization tank, a secondary equalization tank, an oil separator, an air flotation tank, an upflow anaerobic sludge bed reactor, and an integrated wastewater treatment equipment.

[0013] Furthermore, the outlet of the raw water tank is connected to the inlet of the primary equalization tank via a pipeline. A dosing device is installed above the primary equalization tank. The outlet of the primary equalization tank is connected to the inlet of the secondary equalization tank via a pipeline. The secondary equalization tank is used to receive wastewater after sedimentation and separation in the primary equalization tank. The outlet of the secondary equalization tank is connected to the inlet of the oil separator via a pipeline. The outlet of the oil separator is connected to the inlet of the dissolved air flotation tank via a pipeline. The outlet of the dissolved air flotation tank is connected to the inlet of the upflow anaerobic sludge bed reactor via a pipeline. The outlet of the upflow anaerobic sludge bed reactor is connected to the inlet of the integrated wastewater treatment equipment via a pipeline. The outlet of the integrated wastewater treatment equipment is connected to the drainage outlet.

[0014] Preferably, the solid-liquid separation device is a centrifuge or a screw press.

[0015] Preferably, the discharge device is a stepper feeder.

[0016] The beneficial effects of this utility model are:

[0017] (1) After the food waste is treated by this system, the fermentation chamber uses heated air to provide hot air to the food 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 food waste, so that the moisture content of the fermentation product is reduced to less than 40%, which can be used as a resource.

[0018] (2) This system uses high-temperature aerobic fermentation and combines it with the fermentation of special heat-resistant bacteria. It can quickly fix nitrogen and greatly preserve the nutrients in kitchen waste. The fermentation products can be used as a good organic fertilizer substrate raw material. While realizing the resource utilization and feeding back to the biosphere, it does not need to be transported out for incineration, thus reducing the pollution and carbon emissions generated by incineration.

[0019] (3) Due to the high-temperature aerobic fermentation process of this system, the emission of odorous gases such as ammonia and hydrogen sulfide generated during normal temperature fermentation 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

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the fermentation chamber.

[0022] Figure 3 This is a flowchart of the wastewater treatment module.

[0023] Figure 2 The components are: 1. Container 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

[0024] 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.

[0025] A food waste treatment system, such as Figure 1 As shown, it includes a sorting device, a solid-liquid separation device, a wastewater treatment module, a solid material silo, a crusher, a screw press, a buffer silo, a fermentation silo, and a discharge device;

[0026] The sorting device is a conveyor belt that disperses and transports kitchen waste. There are workers on both sides of the conveyor belt to sort the waste manually. The solid-liquid separation device is a centrifuge. The discharge port of the conveyor belt is connected to the inlet of the centrifuge. The liquid discharge port of the centrifuge is connected to the inlet of the wastewater treatment module. The solid discharge port of the centrifuge is connected to the solid silo. The material stored in the solid silo is crushed by a crusher and processed by a screw press before entering the buffer silo for temporary storage. The liquid outlets of the crusher and the screw press are connected to the inlet of the wastewater treatment module.

[0027] like Figure 2As shown, the fermentation chamber includes a chamber body 1. Several parallel aeration pipes 2 are evenly arranged at the bottom of the chamber body 1. The aeration pipes 2 are connected to the outlet of a blower 4 located outside the chamber body through air ducts 3. A heat exchanger 5 is provided at the inlet of the blower 4. 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 chamber body 1 through air ducts 3. A support grid 7 is provided above the aeration pipes 2. Several drainage holes are provided on the support grid 7. The space above the support grid 7 is for placing kitchen waste. A leachate outlet 8 is provided on the bottom side of the chamber body 1. An exhaust gas outlet 9 is provided at the top of the chamber body 1. A crane grab bucket 10 and a turner 11 are provided at the top of the chamber body 1.

[0028] The solid material in the buffer bin is grabbed into the fermentation bin by the overhead crane grab bucket 10. The fermentation product in the fermentation bin is then grabbed into the discharge device by the overhead crane grab bucket 10 and discharged. The discharge device is a stepper feeder. The fermentation product is discharged to the product workshop by the stepper feeder.

[0029] Preferably, the wastewater treatment module includes a raw water tank, a primary equalization tank, a secondary equalization tank, an oil separator, an air flotation tank, an upflow anaerobic sludge bed reactor, and an integrated wastewater treatment equipment.

[0030] The outlet of the raw water tank is connected to the inlet of the primary equalization tank via a pipeline. A dosing device is installed above the primary equalization tank. The outlet of the primary equalization tank is connected to the inlet of the secondary equalization tank via a pipeline. The secondary equalization tank is used to receive wastewater after sedimentation and separation in the primary equalization tank. The outlet of the secondary equalization tank is connected to the inlet of the oil separator via a pipeline. The outlet of the oil separator is connected to the inlet of the dissolved air flotation tank via a pipeline. The outlet of the dissolved air flotation tank is connected to the inlet of the upflow anaerobic sludge bed reactor via a pipeline. The outlet of the upflow anaerobic sludge bed reactor is connected to the inlet of the integrated wastewater treatment equipment via a pipeline. The outlet of the integrated wastewater treatment equipment is connected to the drainage outlet.

[0031] The actual working process and principle of this utility model's food waste treatment system are as follows:

[0032] Raw food waste is dispersed on a conveyor belt, where workers on both sides manually sort it, removing metal, glass, steel wool, large bones, etc. The waste exiting the conveyor belt enters the centrifuge's inlet. The centrifuge is then turned on, separating the food waste into solid and liquid components through centrifugation. The liquid obtained from centrifugation enters the wastewater treatment module for processing, and is discharged after reaching the required standards. The solid material from centrifugation exits into a solid material silo, where it is briefly stored before being crushed. The crushed material then enters a screw press for further processing. The liquid obtained from the crusher and screw press is returned to the wastewater treatment module for further processing, while the solid material processed by the screw press is temporarily stored in a buffer silo.

[0033] The solid material temporarily stored in the buffer bin is grabbed by the overhead grab bucket 10 and transferred into the fermentation chamber 1. An appropriate amount of aerobic fermentation agent is added, and the solid material and agent are mixed evenly using the turner 11. The ratio of fresh air to 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 material in the chamber through the air duct 3 and aeration pipe 2. This maintains the fermentation temperature at 55-70°C and provides sufficient oxygen for the aerobic fermentation bacteria. The material is turned over every 2 hours during the fermentation process. The condensate and leachate generated during the process are drained into the bottom of the fermentation chamber through the drainage holes. After collection, they are discharged from the leachate outlet 8. Part of the hot air in the chamber is discharged through the circulating air duct 7 and then re-enters the fermentation chamber after passing through the fan 4. Part of the waste gas is discharged through the upper waste gas outlet 9. After 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. After the overhead crane grab bucket 10 grabs the material, it is placed on the stepper feeder and discharged to the product workshop through the stepper feeder.

[0034] 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 food waste treatment system, characterized in that, It includes a sorting device, a solid-liquid separation device, a wastewater treatment module, a solid material silo, a crusher, a screw press, a buffer silo, a fermentation silo, and a discharge device; The discharge port of the sorting device is connected to the inlet of the solid-liquid separation device. The liquid discharge port of the solid-liquid separation device is connected to the inlet of the wastewater treatment module. The solid discharge port of the solid-liquid separation device is connected to the solid silo. The material stored in the solid silo is crushed by the crusher and processed by the screw press before entering the buffer silo for temporary storage. The liquid outlets of the crusher and the screw press are connected to the inlet of the wastewater treatment module. The fermentation chamber includes a chamber body. Several parallel aeration pipes are evenly arranged at the bottom of the chamber body. The aeration pipes are connected to the outlet of a blower located outside the chamber body 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 upper part of the chamber body through air ducts. A support grid is provided above the aeration pipes. The support grid is provided with several drainage holes. The space above the support grid is for placing kitchen waste. A leachate outlet is provided on the bottom side of the chamber body. An exhaust gas outlet is provided at the top of the chamber body. A crane grab bucket and a turner are provided at the top of the chamber body. The solid materials in the buffer silo are grabbed into the fermentation silo by the overhead crane grab bucket, and the fermentation products in the fermentation silo are grabbed into the discharge device by the overhead crane grab bucket and then discharged.

2. The processing system according to claim 1, characterized in that, The sorting device is a conveyor belt that disperses and transports kitchen waste.

3. The processing system according to claim 1 or 2, characterized in that, The wastewater treatment module includes a raw water tank, a primary equalization tank, a secondary equalization tank, an oil separator, an air flotation tank, an upflow anaerobic sludge bed reactor, and an integrated wastewater treatment equipment.

4. The processing system according to claim 3, characterized in that, The outlet of the raw water tank is connected to the inlet of the primary equalization tank via a pipeline. A dosing device is installed above the primary equalization tank. The outlet of the primary equalization tank is connected to the inlet of the secondary equalization tank via a pipeline. The secondary equalization tank is used to receive wastewater after sedimentation and separation in the primary equalization tank. The outlet of the secondary equalization tank is connected to the inlet of the oil separator via a pipeline. The outlet of the oil separator is connected to the inlet of the dissolved air flotation tank via a pipeline. The outlet of the dissolved air flotation tank is connected to the inlet of the upflow anaerobic sludge bed reactor via a pipeline. The outlet of the upflow anaerobic sludge bed reactor is connected to the inlet of the integrated wastewater treatment equipment via a pipeline. The outlet of the integrated wastewater treatment equipment is connected to the drainage outlet.

5. The processing system according to claim 1, 2, or 4, characterized in that, The solid-liquid separation device is a centrifuge or a screw extruder.

6. The processing system according to claim 3, characterized in that, The solid-liquid separation device is a centrifuge or a screw extruder.

7. The processing system according to claim 1, 2, or 4, characterized in that, The discharge device is a stepper feeder.

8. The processing system according to claim 3, characterized in that, The discharge device is a stepper feeder.

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