CN113800967B - Mixed garbage composting device and composting method - Google Patents
Mixed garbage composting device and composting method Download PDFInfo
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- CN113800967B CN113800967B CN202111298149.9A CN202111298149A CN113800967B CN 113800967 B CN113800967 B CN 113800967B CN 202111298149 A CN202111298149 A CN 202111298149A CN 113800967 B CN113800967 B CN 113800967B
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- C05—FERTILISERS; MANUFACTURE THEREOF
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- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/60—Heating or cooling during the treatment
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/70—Controlling the treatment in response to process parameters
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- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- C05F17/993—Arrangements for measuring process parameters, e.g. temperature, pressure or humidity
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- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
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Abstract
The invention provides a mixed garbage stacking device and a composting method, wherein the mixed garbage stacking device comprises a tank body, wherein the tank body is used for stacking mixed garbage, and a feed inlet and a discharge outlet are arranged on the tank body; the core temperature sensor is arranged in the tank body and is used for acquiring a core temperature value of the mixed garbage piled in the tank body; and the temperature adjusting mechanism is arranged on the tank body and is configured to adjust the temperature in the tank body based on the core temperature value acquired by the core temperature sensor. The mixed garbage composting device provided by the invention is suitable for carrying out programmed stage temperature rise composting on mixed garbage, so that the composting period is shortened, and the efficient recycling of organic matters in the mixed garbage is realized.
Description
Technical Field
The invention relates to the field of garbage disposal, in particular to a mixed garbage composting device and a composting method.
Background
At present, the amount of organic waste produced in China per year reaches 41.3-43.3 hundred million tons, the organic waste is various in variety, wide in source and complex in composition, kitchen waste and livestock manure are two main types of organic waste, the crude organic matter content in the waste is 12.3 hundred million tons, the reserves of nitrogen, phosphorus and potassium nutrient elements are about 0.87 hundred million tons, and efficient resource utilization is needed.
Aerobic composting is widely applied to organic garbage treatment due to simple operation, and after the collected organic garbage is piled to a proper water content, rice hulls, straws and other auxiliary materials are mixed, composting is started. The organic garbage is subjected to heating, high temperature, cooling and decomposition in sequence in the composting process, and finally a composting product is obtained.
The temperature is one of the most important factors influencing the aerobic composting efficiency, and the high-temperature period temperature of the composting is higher than 50 ℃, so that the decomposition of organic matters can be obviously promoted, the composting process is accelerated, and the composting time is shortened. In this context, whole-course high temperature composting and ultra-high temperature composting technologies have been developed. The whole-course high temperature means that the whole-course temperature of the compost is maintained above 50 ℃ by exogenous heating, and the technology can indeed improve the compost efficiency to a certain extent, but can cause irreversible damage to bacterial communities and desiccation effect caused by the whole-course high temperature. The ultra-high temperature composting is a composting process with the temperature reaching 70-80 ℃ in a high temperature period, the composting is often realized by special high temperature resistant bacteria, and the ultra-high temperature composting cannot be popularized on a large scale because low-cost and general bacteria products are not available in the market. Therefore, reasonable utilization and control of high temperature in composting are important to improving aerobic composting efficiency and shortening composting time.
In order to overcome the defect of high temperature in the whole process, a temperature-raising composting technology in a programmed stage is provided, and the composting technology can relieve the fatal damage of the high temperature or the high temperature in the whole process to a protozoan community, can also ensure the uniformity of the temperature of a composting body, and promotes the efficient decomposition of organic matters and the effective control of pollutants. However, related researches are not enough at present, and mainly focus on the promotion of the highest composting temperature and the domestication research of high-temperature resistant special bacteria, and lack of a special composting device and a specific temperature control strategy which are suitable for the temperature-raising composting in a programmed stage.
Disclosure of Invention
To solve at least one of the above technical problems, a first aspect of the present invention provides a mixed garbage composting device, which comprises:
a hybrid waste composting device comprising:
the garbage can comprises a can body, a garbage can body and a garbage can body, wherein the can body is used for accumulating mixed garbage, and a feed inlet and a discharge outlet are formed in the can body;
the core temperature sensor is arranged in the tank body and is used for acquiring a core temperature value of the mixed garbage piled in the tank body; and
and the temperature adjusting mechanism is arranged on the tank body and is configured to adjust the temperature in the tank body based on the core temperature value acquired by the temperature adjusting mechanism.
In some embodiments, the core temperature sensor is in signal connection with a control end of the temperature adjustment mechanism, and the core temperature sensor transmits the obtained core temperature value of the mixed garbage to the control end of the temperature adjustment mechanism.
In some embodiments, the temperature adjustment mechanism comprises an oil bath bushing and a heating mechanism, wherein: the oil bath lining is paved on the inner wall of the tank body, and heating oil is filled in the oil bath lining; the heating mechanism is paved on the outer wall of the tank body and is used for heating oil in the oil bath bushing.
In some embodiments, the temperature regulating mechanism further comprises an oil bath temperature sensor arranged in the oil bath bushing, the oil bath temperature sensor is in signal connection with a control end of the temperature regulating mechanism, and the oil bath temperature sensor is used for acquiring a temperature value of the heating oil in the oil bath bushing and sending the acquired temperature value of the heating oil to the control end of the temperature regulating mechanism.
In some embodiments, the mixed waste composting apparatus further comprises a stirring mechanism disposed within the tank for stirring the mixed waste deposited within the tank.
In some embodiments, the tank is further provided with an air inlet and an air outlet.
In some embodiments, the hybrid waste composting device further comprises a humidity sensor disposed within the tank.
The mixed garbage composting device provided by the invention is suitable for carrying out programmed stage temperature rise composting on mixed garbage, so that the composting period is shortened, and the efficient recycling of organic matters in the mixed garbage is realized.
In a second aspect, the present invention provides a composting method for mixed waste, which is implemented by the mixed waste composting device provided in the first aspect, and includes the following steps:
and (3) composting pretreatment: adding kitchen waste, excrement and compost auxiliary materials with particle size of 1-3 cm into the tank body, uniformly mixing, adjusting the water content of the mixed waste to 60-70%, the C/N mass ratio to 27-30:1 and the pH value to 7-8;
the temperature in the tank body is regulated to a preset initial temperature through the temperature regulating mechanism;
heating up and composting: acquiring a core temperature value of the mixed garbage through the core temperature sensor, and when the core temperature value exceeds the initial temperature, adjusting the temperature in the tank body through the temperature adjusting mechanism to enable the difference between the temperature in the tank body and the core temperature to be smaller than a preset temperature difference value until the temperature in the tank body reaches a preset high temperature threshold;
high-temperature composting: acquiring a core temperature value of the mixed garbage through the core temperature sensor, and maintaining the temperature in the tank body at the high temperature threshold through the temperature regulating mechanism under the condition that the core temperature value is higher than the high temperature threshold;
and (3) stacking cooling fertilizer: acquiring a core temperature value of the mixed garbage through the core temperature sensor, and when the core temperature value is lower than the high temperature threshold value, regulating and reducing the temperature in the tank body by the temperature regulating mechanism so that the difference between the temperature in the tank body and the core temperature is smaller than the preset temperature difference until the temperature in the tank body is reduced to the initial temperature;
and (3) composting: and maintaining the temperature in the tank body at the initial temperature through the temperature regulating mechanism until the mixed garbage reaches a preset decomposition degree.
In some embodiments, the composting auxiliary material is one or more of corn straw, wheat straw, rice straw and sorghum straw; the initial temperature is 30 ℃, the high temperature threshold is 60 ℃, and the preset temperature difference is 1-3 ℃.
In some embodiments, the mixing of the waste is performed at predetermined time intervals during composting and ventilation of the tank is performed.
According to the composting method, the composting process is divided into five stages, namely an initial stage, a heating composting stage, a high-temperature composting stage, a cooling composting stage and a decomposed composting stage, wherein the initial stage utilizes a temperature regulating mechanism to regulate the temperature of a pile body to be the initial temperature (for example, 30 ℃) suitable for microorganism growth. In the heating and composting stage, the temperature of the periphery of the pile body and the temperature of the core of the pile are synchronously increased by the control of a temperature regulating mechanism, and the temperature is basically consistent (for example, the temperature difference is controlled at 1-3 ℃). In the high temperature composting stage, the pile is kept at a preset high temperature threshold (for example, 60 ℃) to accelerate the composting progress and prevent the bacterial community growth from being damaged by the overhigh temperature. In the stage of cooling and composting, the temperature of the periphery of the pile body and the core of the pile are kept to synchronously drop by the control of a temperature regulating mechanism, and the temperature is kept basically consistent (for example, the temperature difference is controlled at 1-3 ℃). And in the composting stage, the temperature of the piled materials is adjusted to be the initial temperature (30 ℃ for example) suitable for the growth of microorganisms and maintained, so that the piled materials are thoroughly decomposed.
Compared with the prior art, the composting method provided by the invention shortens the composting period and realizes the efficient recycling of organic matters in the mixed garbage.
Drawings
FIG. 1 is a block diagram of a hybrid waste composting apparatus provided by the invention;
FIG. 2 is a schematic diagram showing the trend of the core temperature change in the composting process according to the embodiment of the invention;
FIG. 3 is a schematic diagram showing the trend of organic matter content change in the composting process according to the embodiment of the invention;
FIG. 4 is a schematic view showing the variation trend of germination rate of the compost product obtained by the implementation of the invention;
fig. 1 includes:
the tank body 1, a core temperature sensor 2, a temperature regulating mechanism 3, a humidity sensor 4, a stirring mechanism 5, a feed inlet 11, a discharge outlet 12, an air inlet 13, an air outlet 14, an oil bath bushing 31 and an oil bath temperature sensor 32.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The existing programmed stage heating composting technology mainly focuses on the aspects of raising the highest composting temperature and domesticating high-temperature resistant special bacteria agents, and lacks a special composting device and a specific temperature control strategy which are suitable for programmed stage heating composting.
In view of the above, the present invention provides a mixed garbage composting device and composting method suitable for performing programmed stage temperature rising composting on mixed garbage, which can greatly shorten the composting period of mixed garbage and realize efficient resource utilization of organic matters in mixed garbage.
Description of the hybrid waste composting device
As shown in fig. 1, the mixed garbage composting device provided by the embodiment of the invention comprises a tank body 1, a core temperature sensor 2 and a temperature regulating mechanism 3, wherein:
the tank body 1 is used for accumulating mixed garbage, a feed inlet 11 and a discharge outlet 12 are arranged on the tank body 1, garbage to be treated enters the tank body 1 through the feed inlet 11 and is composted in the tank body 1, and a final product after composting is discharged out of the tank body 1 through the discharge outlet 12. Optionally, the feed inlet 11 is arranged on the side wall of the tank body 1, and the discharge outlet 12 is arranged at the bottom of the tank body 1.
The core temperature sensor 2 is arranged in the tank body, after the mixed garbage is piled up in the tank body 1 to form a pile body, the core temperature sensor 2 is buried by the pile body, and the core temperature sensor 2 is used for acquiring the core temperature value of the pile body formed by the mixed garbage.
A temperature adjustment mechanism 3 is provided on a side wall of the can body, the temperature adjustment mechanism being configured to adjust the temperature inside the can body 1 based on the core temperature value acquired by the core temperature sensor 2.
The temperature in the tank body 1 is the peripheral temperature of the pile body.
The working principle of the mixed garbage composting device provided by the embodiment is as follows:
in the composting process, the core temperature of the pile body is obtained in real time through the core temperature sensor 2. Based on the core temperature, the peripheral temperature of the pile body is correspondingly controlled by the temperature regulating mechanism 3, so that the temperature-raising compost in a programmed stage is realized, and a specific temperature control strategy is described in detail later.
The temperature adjusting mechanism 3 is to adjust the peripheral temperature of the stack body, and first, a core temperature value needs to be obtained, and based on this consideration, optionally, the core temperature sensor 2 is in signal connection with a control end of the temperature adjusting mechanism 3, and the core temperature sensor 2 transmits the obtained core temperature value to the control end of the temperature adjusting mechanism. The control end of the temperature regulating mechanism regulates the peripheral temperature of the pile body based on the core temperature value.
With continued reference to fig. 1, the temperature adjustment mechanism 3 may optionally include an oil bath liner 31 and a heating mechanism (not shown), wherein: an oil bath liner 31 is provided on the inner wall of the tank 1, and heating oil is contained in the oil bath liner 31. The heating mechanism is paved on the outer wall of the tank body 1 and is used for heating oil in the oil bath bushing. The heating mechanism can adopt various existing heating structures, such as an electric heating wire and the like.
Optionally, the temperature adjusting mechanism 3 further includes an oil bath temperature sensor 32 disposed in the oil bath liner 31, where the oil bath temperature sensor 32 is in signal connection with a control end of the temperature adjusting mechanism 3, and the oil bath temperature sensor 32 is used to obtain a temperature value of heating oil in the oil bath liner (i.e. a peripheral temperature value of the stack body), and send the obtained temperature value of the heating oil to the control end of the temperature adjusting mechanism 3.
The programmed stage temperature rising compost is essentially aerobic compost, so that the oxygen content in a pile body needs to be ensured in the composting process, and the aerobic bacteria in the pile body keep enough activity. In this regard, optionally, as shown in fig. 1, the mixed garbage composting apparatus of the present invention further includes a stirring mechanism 5 disposed in the tank 1, and an air inlet 11 and an air outlet 12 are further disposed on the tank 1. In the composting process, the air inlet 11 and the air outlet 12 can be opened periodically according to actual needs to realize ventilation and oxygen supplementing of the tank body 1, and the stirring mechanism 5 is started to stir the mixed garbage synchronously, so that oxygen can fully enter the mixed garbage.
As is known to those skilled in the art, in order to further enhance the composting effect, the water content of the mixed waste needs to be adjusted to a predetermined value before composting, and the water content of the mixed waste needs to be monitored during composting, so that the adjustment of the water content of the mixed waste is implemented. Thus, optionally, the hybrid waste composting device in this embodiment further comprises a humidity sensor 4 arranged inside the tank 1.
Description of the method for composting Mixed refuse
The mixed garbage composting method provided by the invention is implemented by the mixed garbage composting device, and comprises the following steps:
and (3) composting pretreatment: adding kitchen waste, excrement and compost auxiliary materials with particle size of 1-3 cm into the tank body 1, uniformly mixing, adjusting the water content of the mixed waste to 60-70%, the C/N mass ratio to 27-30:1 and the pH value to 7-8.
The temperature in the tank body 1 is regulated to a preset initial temperature through the temperature regulating mechanism 3, and the initial stage composting is started while the temperature is maintained. The composting is continued until the core temperature value exceeds the initial temperature.
Heating up and composting: and when the core temperature value exceeds the initial temperature, the temperature in the tank body 1 is regulated by the temperature regulating mechanism 3 so that the difference between the temperature in the tank body 1 and the core temperature is always smaller than a preset temperature difference value until the temperature in the tank body 1 reaches a preset high-temperature threshold value.
High-temperature composting: the core temperature value of the mixed garbage is obtained through the core temperature sensor 2, and the temperature in the tank body 1 is maintained at the high temperature threshold through the temperature regulating mechanism 3 under the condition that the core temperature value is kept to exceed the high temperature threshold. Namely, in the high-temperature composting stage, the temperature of the core exceeds a high-temperature threshold, and the peripheral temperature of the pile body is kept at the high-temperature threshold.
Cooling and composting: and acquiring a core temperature value of the mixed garbage through a core temperature sensor 2, and when the core temperature value is lower than a high temperature threshold value, regulating the temperature in the tank body 1 by a temperature regulating mechanism 3 to ensure that the difference between the temperature in the tank body 1 and the core temperature is smaller than a preset temperature difference value until the temperature in the tank body 1 is reduced to an initial temperature.
And (3) composting: the temperature in the tank 1 is maintained at the initial temperature by the temperature adjusting mechanism 3 until the mixed garbage reaches the preset decomposition degree. I.e. the composting stage, the peripheral temperature of the pile is kept at the initial temperature.
In the present invention, in general, the initial temperature is set to a temperature that is more suitable for the growth of microorganisms in mixed garbage, and the high temperature threshold is set by comprehensively considering the following two factors: on one hand, the composting progress can be accelerated as much as possible through high temperature, and on the other hand, the bacterial community growth is prevented from being damaged by the overhigh temperature. For example, in some application embodiments, the initial temperature is set to 30 ℃, the high temperature threshold is set to 60 ℃, and the predetermined temperature difference is set to 1-3 ℃, depending on the specific ingredients and properties of the mixed waste.
The composting process of the composting method provided by the invention is divided into five stages, namely an initial stage, a heating composting stage, a high-temperature composting stage, a cooling composting stage and a composting stage in sequence, wherein:
and in the initial composting stage, the temperature of the pile body is regulated to be the initial temperature suitable for the growth of microorganisms by utilizing a temperature regulating mechanism. And in the heating composting stage, the peripheral temperature of the pile body and the core temperature are ensured to rise synchronously by the control of the temperature regulating mechanism, and the temperature is kept basically consistent. And in the high-temperature composting stage, the heap body is kept at a preset high-temperature threshold value to accelerate the composting progress and prevent the bacterial community growth from being damaged by the overhigh temperature. And in the stage of cooling and composting, the temperature of the periphery of the pile body and the core of the pile body is kept to synchronously drop by the control of a temperature regulating mechanism, and the temperature is kept basically consistent. And in the composting stage, the temperature of the piled materials is adjusted to the initial temperature suitable for the growth of microorganisms again and kept, so that the piled materials are thoroughly decomposed.
Compared with the prior art, the composting method provided by the invention shortens the composting period and realizes the efficient recycling of organic matters in the mixed garbage.
Optionally, the composting auxiliary material is one or more of crushed corn straw, wheat straw, rice straw and sorghum straw.
As mentioned throughout, the programmed stage temperature rising compost is essentially an aerobic compost, and thus, during composting, it is necessary to ensure the oxygen content in the heap so that the aerobic species therein remain sufficiently active. Thus, optionally, during composting, the mixed waste is stirred at predetermined time intervals and the tank 1 is ventilated. The specific frequency of agitation and aeration is selected based on the specific composition, nature, etc. of the mixed waste, such as in some embodiments, the high temperature composting stage, with agitation and aeration being performed once a day. And the rest of the composting stages are stirred and ventilated once a day.
Optionally, during the stirring process, a proper amount of water is added, so that the water content of the mixed garbage is always kept at 60-70%.
In order to make the technical effects of the hybrid garbage composting method of the present invention more clearly known to those skilled in the art, the implementation effects of the hybrid garbage composting method of the present invention will be exemplarily described by means of two examples.
Example 1
The mixed garbage comprises 20kg of pig manure, 30kg of kitchen waste and 15kg of corn straw. After being uniformly mixed, the mixture is adjusted, the water content is 63-65%, the C/N ratio is 27-30, the initial pH is 7.7-7.9, and the mixture is slightly alkaline, so that the composting is facilitated. The initial organic matter content of the mixed garbage is 88.87%, the TOC content is 51.55%, the initial germination rate GI is 40.68%,
the initial temperature of the compost is set to be 30 ℃, after the temperature of the core of the compost rises to be more than 30 ℃, the average temperature of a 3 rd balance can reach 50 ℃, the average temperature of 7 th to 9 th balances is about 70 ℃, organic matters in a high temperature period are rapidly degraded, the temperature starts to drop after 9 th day, the temperature drops to 55 ℃ after 10 th day, the temperature drops to 35 ℃ after 12 th day, and the temperature is maintained to be 30 ℃ after 13 th to 14 th day.
The final compost product has a pH of between 8.63 and 8.87 and meets 8 to 9 specified by the Chinese organic fertilizer standard (NY 525-2012). The organic matter content in the compost products is between 78 and 79 percent, which is obviously higher than the standard (NY 525-2012) of the organic matters of the biological fertilizer by more than 25 percent, and the organic carbon TOC content is about 45 percent respectively. The germination rate of the compost product is 147.75 percent, and meets the standard (NY 525-2012) of the germination rate of the biological fertilizer of more than 80 percent.
Example 2
The mixed garbage comprises 20kg of cow dung, 30kg of kitchen waste and 15kg of corn straw, and is regulated after uniform mixing, the water content is 67-69%, the initial C/N ratio is 27-30, and the initial pH is 7.4-7.6. The initial organic matter content of the mixed garbage is 89.22%, the TOC content is 51.75%, the initial germination rate GI is 16.41%,
the initial temperature of the compost is set to be 30 ℃, after the temperature of the core of the compost rises to be more than 30 ℃, the temperature of the compost is regulated by a temperature regulating mechanism, the average temperature of a 3 rd balance can reach 70 ℃, the average temperature of a 3 rd balance to a 5 th balance is about 70 ℃, organic matters in a high-temperature period are rapidly degraded, the temperature is reduced to 60 ℃ after the 6 th day, the temperature is reduced to 40 ℃ after the 10 th day, and the temperature is maintained to be 30 ℃ after the 11 th day to the 14 th day.
The final compost product has a pH of 8.23-8.47 and meets 8-9 specified by Chinese organic fertilizer standard (NY 525-2012). When composting for 40 days, the organic matter content is 79-81%, which is far higher than the standard (NY 525-2012) of biological fertilizer organic matter > 25%; the organic carbon TOC content is 45% -47% respectively. The germination rate of the compost product is 152.74 percent, which is obviously higher than the standard (NY 525-2012) of the germination rate of the biological fertilizer of more than 80 percent.
Fig. 2 to 4 are graphs showing the trend of the core temperature of the mixed garbage, the trend of the organic matter content and the trend of the germination rate of the obtained compost product with time in the composting process of example 1 and example 2 with time. The technical effects achieved by the waste composting method of the invention can be more clearly understood by those skilled in the art from the figures.
For example, as can be seen from fig. 1, the high temperature of the compost in both examples can reach 70 ℃, the high temperature is stable, the maintenance time is long, the composting progress is remarkably accelerated, and the high temperature of the compost in the conventional room temperature compost can not reach 30 ℃.
As can be seen from fig. 2, the organic content of the compost product obtained by both examples is 75-85%, which is significantly higher than 25% specified by the organic fertilizer standard.
As can be seen from FIG. 3, the compost product obtained in both examples has a germination rate between 140-160% which is significantly higher than 80% specified by the organic fertilizer standard, indicating that the product obtained by rapid aerobic composting within 14 days is completely decomposed.
The invention has been described above in sufficient detail with a certain degree of particularity. It will be appreciated by those of ordinary skill in the art that the descriptions of the embodiments are merely exemplary and that all changes that come within the true spirit and scope of the invention are desired to be protected. The scope of the invention is indicated by the appended claims rather than by the foregoing description of the embodiments.
Claims (8)
1. A composting method of mixed waste using a mixed waste composting apparatus comprising:
the garbage can comprises a can body, a garbage can body and a garbage can body, wherein the can body is used for accumulating mixed garbage, and a feed inlet and a discharge outlet are formed in the can body;
the core temperature sensor is arranged in the tank body and is used for acquiring a core temperature value of the mixed garbage piled in the tank body; and
a temperature adjustment mechanism provided on the can body, the temperature adjustment mechanism configured to adjust a temperature inside the can body based on the core temperature value acquired by the core temperature sensor;
the composting method comprises the following steps:
and (3) composting pretreatment: adding kitchen waste, excrement and compost auxiliary materials with particle size of 1-3 cm into the tank body, uniformly mixing, adjusting the water content of the mixed waste to 60-70%, the C/N mass ratio to 27-30:1 and the pH value to 7-8; the composting auxiliary material is one or more of corn straw, wheat straw, rice straw and sorghum straw;
the temperature in the tank body is regulated to a preset initial temperature through the temperature regulating mechanism;
heating up and composting: acquiring a core temperature value of the mixed garbage through the core temperature sensor, and when the core temperature value exceeds the initial temperature, adjusting the temperature in the tank body through the temperature adjusting mechanism to enable the difference between the temperature in the tank body and the core temperature to be smaller than a preset temperature difference value until the temperature in the tank body reaches a preset high temperature threshold value, wherein the preset temperature difference value is 1-3 ℃;
high-temperature composting: acquiring a core temperature value of the mixed garbage through the core temperature sensor, and maintaining the temperature in the tank body at the high temperature threshold through the temperature regulating mechanism under the condition that the core temperature value is higher than the high temperature threshold;
cooling and composting: acquiring a core temperature value of the mixed garbage through the core temperature sensor, and when the core temperature value is lower than the high temperature threshold value, regulating and reducing the temperature in the tank body by the temperature regulating mechanism so that the difference between the temperature in the tank body and the core temperature is smaller than the preset temperature difference until the temperature in the tank body is reduced to the initial temperature;
and (3) composting: maintaining the temperature in the tank body at the initial temperature through the temperature regulating mechanism until the mixed garbage reaches a preset decomposition degree;
the initial temperature is 30 ℃, and the high temperature threshold is 60 ℃.
2. The composting method of claim 1, wherein during composting, the mixed waste is stirred at predetermined time intervals and ventilation of the tank is performed.
3. The composting method of claim 1, wherein said core temperature sensor is in signal connection with a control terminal of said temperature adjustment mechanism, said core temperature sensor transmitting said core temperature value obtained to said control terminal of said temperature adjustment mechanism.
4. The composting method of claim 1, wherein the temperature adjustment mechanism comprises an oil bath bushing and a heating mechanism, wherein:
the oil bath bushing is arranged on the inner wall of the tank body, and heating oil is filled in the oil bath bushing;
the heating mechanism is arranged on the outer wall of the tank body and is used for heating oil in the oil bath bushing.
5. The composting method of claim 4, wherein the temperature adjustment mechanism further comprises an oil bath temperature sensor disposed within the oil bath bushing, the oil bath temperature sensor in signal communication with a control terminal of the temperature adjustment mechanism, the oil bath temperature sensor configured to obtain a temperature value of the heating oil within the oil bath bushing, and send the obtained temperature value of the heating oil to the control terminal of the temperature adjustment mechanism.
6. The composting method of claim 1, wherein the mixed waste composting apparatus further comprises a stirring mechanism disposed within the tank for stirring the mixed waste deposited within the tank.
7. The composting method of claim 1, wherein the tank is further provided with an air inlet and an air outlet.
8. The composting method of claim 1, wherein said hybrid waste composting apparatus further comprises a humidity sensor disposed within said tank.
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| CN202111298149.9A CN113800967B (en) | 2021-11-03 | 2021-11-03 | Mixed garbage composting device and composting method |
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| CN202111298149.9A CN113800967B (en) | 2021-11-03 | 2021-11-03 | Mixed garbage composting device and composting method |
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| CN113800967B true CN113800967B (en) | 2023-07-21 |
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