CN103350099A - Integrated treatment process for kitchen waste - Google Patents
Integrated treatment process for kitchen waste Download PDFInfo
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- CN103350099A CN103350099A CN2013102728061A CN201310272806A CN103350099A CN 103350099 A CN103350099 A CN 103350099A CN 2013102728061 A CN2013102728061 A CN 2013102728061A CN 201310272806 A CN201310272806 A CN 201310272806A CN 103350099 A CN103350099 A CN 103350099A
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- food waste
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/20—Waste processing or separation
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Abstract
The invention discloses an integrated treatment process for kitchen waste. The integrated treatment process is characterized by comprising the following steps: classification; sorting; high temperature sterilization; solid-liquid separation; oil-water separation; preparation of biogas; and recovery of grease. With such a technical scheme in the invention, a solid material in the kitchen waste can be used for preparation of a feed additive; an oil-water mixture in the kitchen waste can be used for preparation of biodiesel after separation of grease, and liquid produced in the process of treatment of the waste can be separated and used for preparing biogas, biogas slurry and biogas residue; high temperature sterilization is carried out on the solid material before preparation of the feed additive, so pathogens in the material are effectively killed, and safety in eating of the feed additive by animals is effectively improved; the kitchen waste is converted into biodiesel, biogas and the feed additive, usable materials in the kitchen waste are sterilized at high temperature until the materials are safe and sterile, so resourceful and harmless treatment of the kitchen waste is realized.
Description
Technical field
The present invention relates to the technology of garbage disposal field, relate in particular to a kind of changing food waste integrated conduct method.
Background technology
Changing food waste is the most general discarded object that produces in the daily life of city, belong to domestic waste, its main component comprises the organic matters such as starch food, string, animal protein and fats, has the moisture content height, grease, salt content height, perishable smelly, be unfavorable for the characteristics such as common garbage truck transportation, if this class rubbish can cause great harm to environment without the classification special treatment.
Changing food waste is mainly derived from food process leftover bits and pieces (kitchen is remaining) and edible remaining (hogwash) that food and restaurant service industry, family and enterprises and institutions dining room etc. produce.Along with the develop rapidly of our national economy, the gradually quickening of urbanization process, the output of changing food waste presents the trend that rises year by year.In large-scale, the megapolis at home such as Beijing, Shanghai, Shenzhen etc., the daily output of changing food waste has reached thousands of tons of, the annual production of whole nation changing food waste reaches ten million ton, the words of simple landfill, take a large amount of soils, the percolate and the landfill gas that produce also need post-processed, expend a large amount of manpowers, material resources.
Changing food waste not yet carries out standardized management in a lot of cities at present, and it is dirty and messy that collection container is put the ground environment, and multiply and attract the insects such as mosquito, fly, mouse, cockroach, the infectivity disease, the harm people's is healthy.Produce easily bad smell near the refuse collection ground, cause the dislike on people's sense organ; Because there is series of problems in the higher characteristic of changing food waste water content in the process of transportation.Haulage vehicle is lack of standardization, changing food waste easily occurs leak outside and pour down or forth, and has a strong impact on the appearance of the city, city's looks and traffic; Most importantly the rubbish of urban catering enterprise is many is collected by the raiser, directly use as breeding feed, the pathogenic microorganism that contains a large amount of infectious diseases common to human beings and animals in the changing food waste not only causes zoogenetic infection virus easily, also causes easily the diseases such as human infection aftosa, hepatitis.Pig feed with after very easily infect and bring out various diseases, certainly will strengthen the dosage to sick pig, thereby can strengthen the residual of antibiotics, enter human body by pork, easily health is worked the mischief.Kitchen castoff, be subject to the pollution of the heavy metal such as aluminium, mercury, cadmium and organic compound, benzene-like compounds, by pig feed with after, harmful substance is accumulated in the tissue such as the fat, muscle of pig, after the people eats to a certain degree, will cause the systemic immune functions such as liver, kidney to descend.Waste oil also is collected again to refine simultaneously becomes cheap edible oil, again circulation on market, and the harm people's is healthy.
In the in-problem while, changing food waste also can be used as potential energy supply body because it is rich in organic matter.By appropriate processing method, can discharge the energy of containing in changing food waste, be converted into electric energy, heat energy is as effectively replenishing of conventional energy resource carrier.In the period that current China is becoming tight energy supply day, it is extremely urgent to seek new forms of energy, utilizes changing food waste to obtain the energy rational solution of can yet be regarded as by the maturation process technology.
In addition, changing food waste is made feed and may be caused homology to be polluted.So-called homology is polluted the animal derived feed that the animal tissues such as the meat that refers to its similar animal of animal edible, bone, blood produce, potential, the uncertain risk that spreads disease of generation.Exactly contain animal tissue in the changing food waste, directly as animal feed, exist potential risk.
Except directly using as the forage feed animal, after being refined by the lawless person, the grease part in the changing food waste again also the mankind's health is produced threat as edible oil (waste oil) use.Contain the toxin impurity such as aflatoxins, benzene in the waste oil, the long-term edible generation that can cause chronic disease can be more carcinogenic when more serious, and therefore,, recycling treatment innoxious to changing food waste is necessary.
Summary of the invention
The problem to be solved in the present invention is the deficiency for above-mentioned technical problem, provides a kind of changing food waste effectively can the processing to obtain the energy and fertilizer, the final resource of rubbish, the changing food waste integrated conduct method of harmless treatment effectively realized.
In order to address the above problem, the present invention by the following technical solutions: a kind of changing food waste integrated conduct method is characterized in that: may further comprise the steps:
(1), classification: changing food waste is transported to the harmless treatment workshop with the airtight collecting cart of having electronic scale, automatic charging, the liquid material in the changing food waste is separated with solid material;
(2), sorting: the available material in the solid material is separated with unavailable material;
(3), high-temperature sterilization: the isolated material that utilizes is carried out the thermophilic digestion sterilization;
(4), Separation of Solid and Liquid: the utilized material behind the high-temperature sterilization is carried out Separation of Solid and Liquid, liquid material is separated with solid material;
(5), water-oil separating: isolated solid material in the Separation of Solid and Liquid is processed into feed addictive, and the liquid material in isolated liquid material and the step (1) is transported to oily water separating equipment carries out water-oil separating;
(6), Biogas: the waste water after the water-oil separating is passed into marsh-gas fermentation tank carry out biogas fermentation;
(7), oil recovery: the grease after the water-oil separating is made biodiesel.
Below be further improvement of the present invention:
Sorting comprises two steps in the step (2).
Further improve:
At first carry out a level sortation unavailable Material Sorting that volume ratio is larger out by sorter during sorting, then carry out two level sortations with the unavailable Material Sorting of small volume out by sorter.
Further improve:
High-temperature sterilization carries out in the high temperature sterilization cooker in the step (3).
Further improve:
Described sterilising temp is 270-290 ℃, and digestion time is 20-40 minute.
Further improve:
Dry by dryer when the solids worker becomes feed addictive in the step (5).
Further improve:
Biogas fermentation adopts Unareobic fermentation in the step (6).
The present invention adopts technique scheme, and the solid material in the changing food waste can be used for the Fodder making additive; Oil water mixture in the changing food waste can be made biodiesel after isolating grease, the liquid in garbage processing procedure is separable to be gone out for making biogas, natural pond liquid, natural pond slag; Before the Fodder making additive, solid material is carried out high-temperature sterilization, effectively kill the germ in the material, effectively raise the security of animal edible feed addictive; Changing food waste is converted into biodiesel, biogas and feed addictive, and the available material high-temperature sterilization in the changing food waste is reached the degree of safety asepsis, effectively realize resource, the harmless treatment of changing food waste.
The specific embodiment:
Embodiment, as shown in Figure 1, a kind of changing food waste integrated conduct method, adopt following steps:
(1) classification:
Changing food waste is transported to the harmless treatment workshop with the airtight collecting cart of having electronic scale, automatic charging, changing food waste is poured in the feed tank of harmless treatment workshop, the liquid materials such as oil water mixture flow into oily water separating equipment through sewer, and the available fixedly materials such as the disabled solid material of the metals such as chopsticks, plastic products, bottle cap and leftovers are stayed in the feed tank of harmless treatment workshop.
(2) sorting:
By the rubbish elevator solid material is transported to sorter and carries out a level sortation, the Material Sorting that the specific volumes such as chopsticks, polybag is larger out, remaining material is transported to feeding platform through plate feeder carries out two level sortations by sorter the less hard ware material of bottle cap equal-volume is sorted out, residue can be utilized material.
(3) high-temperature sterilization:
The above-mentioned mass transport of utilizing is carried out high-temperature sterilization to the high temperature sterilization cooker, and the sterilising temp boiling is controlled at 270-290 ℃, and digestion time is 20-40 minute.
(4) Separation of Solid and Liquid:
The mass transport utilized behind the above-mentioned high-temperature sterilization is carried out Separation of Solid and Liquid to solid-liquid separating equipment, dry as feed addictive by dryer after solid material is separated, liquid material flow into oily water separating equipment.
(5) water-oil separating:
Isolated liquid in step (1) and the step (4) is carried out water-oil separating by oily water separating equipment, isolated grease for the production of biodiesel, is transported to marsh-gas fermentation tank with the waste water after separating.
(6) Biogas
In marsh-gas fermentation tank waste water being carried out anaerobic fermentation processes, organic matter wherein is under the effect of anaerobic bacteria, under suitable temperature conditions, degraded produces biogas by fermentation, the less natural pond slag of water content that produces after the degraded uses as organic fertilizer after treatment, natural pond liquid uses as liquid fertilizer, thereby realize the garbage decrement recycling, contain the 55%-75%(volumetric concentration in the biogas that produces after the fermentation) methane, can be used for generating, heat supplies etc. can be alleviated the situation of energy supply anxiety.
Claims (7)
1. changing food waste integrated conduct method is characterized in that: may further comprise the steps:
(1), classification: changing food waste is transported to the harmless treatment workshop, the liquid material in the changing food waste is separated with solid material;
(2), sorting: the available material in the solid material is separated with unavailable material;
(3), high-temperature sterilization: the isolated material that utilizes is carried out the thermophilic digestion sterilization;
(4), Separation of Solid and Liquid: the utilized material behind the high-temperature sterilization is carried out Separation of Solid and Liquid, liquid material is separated with solid material;
(5), water-oil separating: isolated solid material in the Separation of Solid and Liquid is processed into feed addictive, and the liquid material in isolated liquid material and the step (1) is transported to oily water separating equipment carries out water-oil separating;
(6), Biogas: the waste water after the water-oil separating is passed into marsh-gas fermentation tank carry out biogas fermentation;
(7), oil recovery: the grease after the water-oil separating is made biodiesel.
2. a kind of changing food waste integrated conduct method according to claim 1 is characterized in that: sorting comprises two steps in the step (2).
3. a kind of changing food waste integrated conduct method according to claim 2, it is characterized in that: at first carry out a level sortation unavailable Material Sorting that volume is larger out by sorter during sorting, then carry out two level sortations with the unavailable Material Sorting of small volume out by sorter.
4. a kind of changing food waste integrated conduct method according to claim 1 is characterized in that: high-temperature sterilization carries out in the high temperature sterilization cooker in the step (3).
5. a kind of changing food waste integrated conduct method according to claim 3, it is characterized in that: described sterilising temp is 270-290 ℃, digestion time is 20-40 minute.
6. require 1 described a kind of changing food waste integrated conduct method according to power, it is characterized in that: be processed into feed addictive after solid material is dried by dryer in the step (5).
7. root a kind of changing food waste integrated conduct method claimed in claim 1 is characterized in that: biogas fermentation employing Unareobic fermentation in the step (6).
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| CN2013102728061A CN103350099A (en) | 2013-07-02 | 2013-07-02 | Integrated treatment process for kitchen waste |
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| CN2013102728061A CN103350099A (en) | 2013-07-02 | 2013-07-02 | Integrated treatment process for kitchen waste |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945029A (en) * | 2016-05-04 | 2016-09-21 | 浙江绿洲环保能源有限公司 | Kitchen waste disposal process |
| CN106734122A (en) * | 2017-04-05 | 2017-05-31 | 上海元始环境科技发展有限公司 | A kind of method for innocent treatment of kitchen garbage |
| CN107812773A (en) * | 2017-09-28 | 2018-03-20 | 银川保绿特生物技术有限公司 | A kind of innocuity disposal system of kitchen leftover |
| CN109759424A (en) * | 2019-02-26 | 2019-05-17 | 刘西成 | A kind of method for organic waste disposal |
| CN111069236A (en) * | 2019-12-20 | 2020-04-28 | 上海耀嵘环保科技有限公司 | Advanced treatment process for kitchen waste |
| CN111151554A (en) * | 2020-01-14 | 2020-05-15 | 浙江蓝景科技有限公司 | Kitchen waste treatment process |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945029A (en) * | 2016-05-04 | 2016-09-21 | 浙江绿洲环保能源有限公司 | Kitchen waste disposal process |
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| CN107812773A (en) * | 2017-09-28 | 2018-03-20 | 银川保绿特生物技术有限公司 | A kind of innocuity disposal system of kitchen leftover |
| CN109759424A (en) * | 2019-02-26 | 2019-05-17 | 刘西成 | A kind of method for organic waste disposal |
| CN111069236A (en) * | 2019-12-20 | 2020-04-28 | 上海耀嵘环保科技有限公司 | Advanced treatment process for kitchen waste |
| CN111151554A (en) * | 2020-01-14 | 2020-05-15 | 浙江蓝景科技有限公司 | Kitchen waste treatment process |
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Application publication date: 20131016 |