CN109467266A - A kind of changing food waste into resources treatment process - Google Patents
A kind of changing food waste into resources treatment process Download PDFInfo
- Publication number
- CN109467266A CN109467266A CN201811441911.2A CN201811441911A CN109467266A CN 109467266 A CN109467266 A CN 109467266A CN 201811441911 A CN201811441911 A CN 201811441911A CN 109467266 A CN109467266 A CN 109467266A
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- Prior art keywords
- treatment process
- waste water
- changing food
- kitchen garbage
- food waste
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0275—Other waste gases from food processing plants or kitchens
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a kind of changing food waste into resources treatment process, pre-process first to the kitchen garbage of collection, including carry out the broken simultaneously thermophilic digestion of sorting to kitchen garbage；Then three phase separation is carried out to pretreated kitchen garbage, isolates crude oil rouge, waste water and solid slag, crude oil rouge is subjected to unified collection；Solid slag addition bacteria agent after three phase separation is subjected to aerobic fermentation and secondary fermentation, after the steam separation that fermentation is generated, water section carries out waste water dis posal discharge together with the waste water that three phase separation obtains, and exhaust gas section carries out exhaust gas disposition discharge.The present invention provides a kind of improved changing food waste into resources treatment process, and the thick grease yield of kitchen garbage greatly improved, and can obtain higher recycling income, while can shorten the period of aerobic fermentation, improve compost quality, realize the near-zero release of peculiar smell waste water.
Description
Technical field
The invention belongs to waste control techniques, and in particular to a kind of changing food waste into resources treatment process.
Background technique
Kitchen garbage mainly includes rice, wheaten food class residue, meat, vegetables, bone, melon and fruit peel etc., with starch, food
The organic substances such as fiber-like, protein, lipid are main component, while also containing inorganic salts, have high grease, high salt,
The features such as high-moisture, high organic content and perishable smelly, easy acidification, easily biological-degradable.Since its nutrient is abundant
Feature, therefore be worth with very big recycling.The feature of kitchen garbage is in particular in following several respects:
1, moisture content is high.The moisture content of kitchen garbage is generally attained by 80%~90%, therefore mobility is big, and transport is not
Just, it is very easy to leakage, calorific value is lower, and processing method is improper to be easy to produce secondary pollution.
2, high organic content.The high organic contents such as crude fat, crude protein in kitchen garbage, rich in N, P, K, Ca and respectively
Kind microelement, developing and utilizingpotentiality are big.
3, oil, the content of salt are higher.Kitchen garbage has the characteristics that high salt, is easily acidified, and wants comprehensive when being handled
It closes and considers the factor, to prevent there is the problems such as utilization rate of oil, the inhibition of salt or resource product is low.
4, kitchen garbage is just easy to rot at normal temperature, and germ easy to breed gives rise to diseases.Kitchen garbage
Features above show on the one hand utility value with higher, on the other hand must carry out processing appropriate to it, could obtain
To the unification of social benefit, economic benefit and environmental benefit.
In view of the above feature, the harm of kitchen garbage is mainly reflected in following several respects:
1, the appearance of the city and living environment are influenced；It is that the character of kitchen garbage itself will affect the vision and smell of people first, separately
Outer rubbish is easy to produce the pollution environment such as foul smell, sewage during processing.
2, kitchen garbage is used as feed to keep fowls, and since kitchen garbage easily rots, is transporting and storing process
It is middle to generate a large amount of toxin and germ, it be used to will have a direct impact on after feed stripped the health of the mankind.
3, " hogwash fat " derived from by kitchen garbage, easily generation carcinogen --- aflatoxins, it is strong to people's body
Health is very harmful.Such as related gutter oil problem, there are about 2,000,000~3,000,000 tons of gutter oils to return to dining table every year, contains in gutter oil
A large amount of toxin, once it is edible, then food poisoning can be caused even carcinogenic.
If 4, the waste grease in kitchen garbage and solid residue are discharged into sewer, it is be easy to cause blocking, pollutes environment, very
To serious conditions such as initiation sewer pipe explosions.
Mainly have for kitchen garbage processing disposal technology: large and medium-sized centralization aerobic compost, anaerobic digestion, processing system are raised
It material, the small-sized aerobic sigestion of fixed-point type, small home compost and is crushed by pulverizer and enters sewer pipe and with sewage merge place
The measures such as reason.
Fixed-point type aerobic sigestion: kitchen garbage can be handled directly after generating, and time and the space of storage be reduced, to reduce
Because the smelly volume of corruption incurs the possibility of mosquitos and flies, optimize hygienic conditions, reduces secondary pollution in freight and transportational process
May, realize that source processing and local use, reduction rate and resource rate are all higher.Therefore fixed-point type aerobic sigestion is also current
One of the major way of kitchen garbage processing.
The kitchen garbage of fixed-point type aerobic sigestion at present treatment process is as shown in Figure 1, the technique has following three:
1, common three phase separation cannot well detach grease in kitchen garbage.Because the income of grease compares
Height, one ton of 3000 yuan of crude oil rouge market price or more can be improved if can preferably separate the grease in kitchen garbage
The resource rate of kitchen garbage brings higher profit to user, while can mitigate in aerobic fermentation grease to strain
It influences；
2, common strain is difficult to survive in the kitchen garbage environment of high oil with high salt, influences time and the matter of aerobic fermentation
Amount；
3, waste water and exhaust gas are there is no processing well in kitchen garbage treatment process, and externally there is also certain dirts
Dye, especially peculiar smell is more serious.
Summary of the invention
Technical problem solved by the present invention is being directed on existing for the above fixed-point type aerobic sigestion kitchen garbage treatment process
Problem is stated, a kind of improved changing food waste into resources treatment process is provided.
The present invention adopts the following technical scheme that realization:
A kind of changing food waste into resources treatment process, includes the following steps:
The kitchen garbage of collection is pre-processed first, including the broken simultaneously thermophilic digestion of sorting is carried out to kitchen garbage；
Then three phase separation is carried out to pretreated kitchen garbage, crude oil rouge, waste water and solid slag is isolated, by crude oil rouge
Carry out unified collection；
Solid slag addition bacteria agent after three phase separation is subjected to aerobic fermentation and secondary fermentation, the steam that fermentation is generated
After separation, water section carries out waste water dis posal discharge together with the waste water that three phase separation obtains, and exhaust gas section carries out exhaust gas disposition row
It puts.
Further, the water of kitchen garbage quality 40%-60% is added in the thermophilic digestion process, and heating temperature is in 70-
90 DEG C, heating time 10-20 minute.
Further, the bacteria agent be can be in 55 DEG C of high temperature environment below and high grease and highly-saline
Escherichia coli variation strain, the ferment bacterium sufficiently fermented in environment one of adopts standing grain microbial inoculum or a variety of.
Further, before the aerobic fermentation, stalk, rice bran, husk, mushroom are added into the solid slag after three phase separation
Slag, sawdust are as auxiliary material, to adjust the moisture in solid slag, C/N content.
Further, waste water is continued through level-one conditioning tank, coagulative precipitation tank, second level and adjusted by the waste water dis posal process
Pond, hydrolysis acidification pool, contact-oxidation pool and the pond MBR, the level-one conditioning tank adjust the pH value of waste water, in the coagulative precipitation tank
Add PAC, PAM precipitating removal grease and suspended matter, the pH value of second of adjusting water of the second level conditioning tank, the hydrolysis acidification
Pond, contact-oxidation pool and the pond MBR carry out biochemical treatment to waste water, COD, ammonia nitrogen, TP pollutant in water removal are removed, after biochemical treatment
Discharged wastewater met the national standard.
Further, the hydrolysis acidification pool, contact-oxidation pool and the pond MBR carry out Air Exposure respectively, wherein hydrolysis acid
The aeration quantity changed in pond is less than other two ponds.
Further, the coagulative precipitation tank and hydrolysis acidification pool are connect with sludge-tank, collect sludge.
Further, the exhaust gas disposition uses biofiltration process, by kitchen exhaust gas into after overregulating temperature and humidity, into
Enter biological processing unit, absorbs the odoring substance in simultaneously waste gas decomposition using the microorganism in biological processing unit, complete exhaust gas
Qualified discharge.
Further, the biological processing unit is the internal bacteria bed for being equipped with and covering with the solid carrier of microorganism.
The invention has the following beneficial effects:
1, grease amount of precipitation can be improved in the high-temperature cooking process in the present invention, increases recycling benefits, while giving rear end
Aerobic fermentation provides suitable initial temperature.
It 2, can be in the item of medium temperature (35 DEG C) and high temperature (55 DEG C) for the biological inoculum of aerobic fermentation addition in the present invention
Under part, sufficiently ferments in high grease (oil content 6%) and the environment of high salt (3% or more mass fraction), relax biology
The condition of fermentation improves the ferment effect of strain in harsh environment.
3, the present invention increases waste water treatment process during recycling treatment, to the waste water after kitchen garbage water-oil separating
Back-end processing is carried out with condensed water, the perfect treatment process process of entire kitchen garbage makes that sewage direct emission up to standard is discharged
And free from extraneous odour.
4, the present invention increases biological filter deodorizing technique during recycling treatment, gives up in kitchen garbage governance process
Gas is administered, and realizes free from extraneous odour discharge.
In conclusion kitchen greatly improved the present invention provides a kind of improved changing food waste into resources treatment process
Garbage rough grease yield can obtain higher recycling income, while can shorten the period of aerobic fermentation, improve compost product
Matter realizes the near-zero release of peculiar smell waste water.
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Detailed description of the invention
Fig. 1 is existing kitchen garbage processing technological flow figure in background technique.
Fig. 2 is kitchen garbage processing technological flow figure of the invention in embodiment.
Fig. 3 is the waste water dis posal flow chart in embodiment.
Fig. 4 is the exhaust gas disposal process figure in embodiment.
Specific embodiment
Embodiment
Referring to fig. 2, the kitchen garbage processing technological flow in diagram includes the following steps:
A kind of changing food waste into resources treatment process, includes the following steps:
The kitchen garbage of collection is pre-processed first, it is broken that kitchen garbage first carries out to sorting, remove impurity and
Big material in rubbish or the substance progress for being not easy to carry out anaerobic digestion is broken apart, then to the broken kitchen of sorting
Rubbish carries out thermophilic digestion, and the specific practice of thermophilic digestion is that the water of kitchen garbage quality 40%-60% is added in digestion process,
Heating temperature is at 70-90 DEG C, and the grease in kitchen garbage can be sufficiently precipitated in heating time 10-20 minute in this way, and to rear
The aerobic fermentation in face provides initial temperature.
Then three phase separation is carried out to pretreated kitchen garbage, crude oil rouge, waste water and solid slag is isolated, wherein by thick
Unified collection meets at qualified producer and is recycled after grease separation, and isolated waste water is discharged into related treatment unit for waste water
Carry out waste water dis posal.
By the solid slag addition auxiliary material and bacteria agent progress aerobic fermentation and secondary fermentation after three phase separation, wherein auxiliary material is adopted
It is used to adjust the C/N content of material in fermentation process with stalk, rice bran, husk, mushroom residue, sawdust, bacteria agent uses large intestine
Escherichia variation strain, ferment bacterium one of adopt standing grain microbial inoculum or a variety of, such strain can be with medium temperature (35 DEG C) and high temperature
Under conditions of (55 DEG C), sufficiently sent out in high grease (oil content 6%) and the environment of high salt (3% or more salinity mass fraction)
Ferment.After the steam that fermentation is generated is by condensing and separating, the condensation wastewater fraction of generation is together with the waste water that three phase separation obtains
Waste water dis posal discharge is carried out, the exhaust gas section of generation carries out exhaust gas disposition row by unified collect to exhaust gas treatment unit of pipeline
It puts.Qualified organic fertilizer is formed by the material (free from extraneous odour) that fermenting twice is completed.
Waste water dis posal process uses pretreatment+biochemical treatment+further treatment technique in the present embodiment.Specifically such as institute in Fig. 3
Show, the waste water after water-oil separating enters level-one conditioning tank and the pH value of waste water is adjusted, and being formed is suitable for coagulating sedimentation
Environment provides condition for subsequent coagulating sedimentation；The water outlet of level-one conditioning tank enters coagulative precipitation tank, adds into coagulative precipitation tank
PAC, PAM be further demulsified, coagulation, precipitating, removes grease and suspended matter, sediment enter sludge-tank；Coagulative precipitation tank
Water outlet enters second level conditioning tank and carries out second of adjusting to the pH of waste water, forms the environment of suitable micro-organisms growth, is subsequent
Biochemical treatment provides condition；The water outlet of second level conditioning tank subsequently enters hydrolysis acidification pool, contact-oxidation pool and MBR and gives birth to waste water
Change processing effectively removes the pollutants such as COD, ammonia nitrogen, TP, the discharge of MBR standard water discharge；Hydrolysis acidification pool, contact-oxidation pool and MBR
Air Exposure is carried out in pond, wherein hydrolysis acidification pool aeration quantity is small, guarantees anaerobic environment, has been aerated stirring action, hydrolysis acidification
The mud discharging that pond generates is focused on into sludge-tank, and contact-oxidation pool and the pond MBR aeration quantity are big, guarantees aerobic environment.
Exhaust gas disposition in the present embodiment uses biofiltration process Treatment process, specific as shown in figure 4, kitchen exhaust gas passes through
After adjusting temperature and humidity, into biological processing unit, biofiltration is to utilize absorption, absorption, digestion of the microorganism to foul smell
With the effect of degradation, biological processing unit is used as using bacteria bed in diagram, stacking cultivation on bacteria bed has microorganism
Filler, the exhaust gas being collected by covering with the solid packing of microorganism, the odorous substance in exhaust gas first by packing material absorbing, then by
Microbiological oxidation on filler is decomposed, and completes the governance process of foul smell, the exhaust gas qualified discharge after improvement.Biology in relation to foul smell
Treatment process is common technology, and the microorganism of use can be selected according to specific foul smell type, and the present embodiment is not done herein
It repeats.
The technical process of the present embodiment in prior art process and Fig. 2 in Fig. 1 is respectively adopted to two batches phase homogenous quantities
Kitchen garbage is handled, and the parameter comparison generated is as follows:
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment
Limitation, other any changes, modifications, substitutions, combinations, simplifications made without departing from the spirit and principles of the present invention,
It should be equivalent substitute mode, be included within the scope of the present invention.
Claims (9)
1. a kind of changing food waste into resources treatment process, it is characterised in that include the following steps:
The kitchen garbage of collection is pre-processed first, including the broken simultaneously thermophilic digestion of sorting is carried out to kitchen garbage；
Then three phase separation is carried out to pretreated kitchen garbage, isolates crude oil rouge, waste water and solid slag, crude oil rouge is carried out
It is unified to collect；
Solid slag addition bacteria agent after three phase separation is subjected to aerobic fermentation and secondary fermentation, the steam that fermentation is generated separates
Afterwards, water section carries out waste water dis posal discharge together with the waste water that three phase separation obtains, and exhaust gas section carries out exhaust gas disposition discharge.
2. a kind of changing food waste into resources treatment process according to claim 1, kitchen is added in the thermophilic digestion process
The water of rubbish quality 40%-60%, heating temperature is at 70-90 DEG C, heating time 10-20 minute.
3. a kind of changing food waste into resources treatment process according to claim 1, the bacteria agent is can be in middle height
Escherichia coli variation strain, the ferment bacterium sufficiently fermented in warm environment and high grease and highly-saline environment adopts standing grain bacterium
One of agent is a variety of.
4. a kind of changing food waste into resources treatment process according to claim 3, before the aerobic fermentation, to three phase separation
Stalk, rice bran, husk, mushroom residue, sawdust are added in solid slag afterwards as auxiliary material, to adjust the moisture in solid slag, C/N contains
Amount.
5. a kind of changing food waste into resources treatment process according to claim 1, the waste water dis posal process connect waste water
It is continuous to pass through level-one conditioning tank, coagulative precipitation tank, second level conditioning tank, hydrolysis acidification pool, contact-oxidation pool and the pond MBR, the level-one
Conditioning tank adjusts the pH value of waste water, and PAC, PAM precipitating removal grease and suspended matter, the second level are added in the coagulative precipitation tank
The pH value of second of adjusting water of conditioning tank, the hydrolysis acidification pool, contact-oxidation pool and the pond MBR carry out biochemical treatment to waste water,
Remove COD, the ammonia nitrogen, TP pollutant in water removal, the discharged wastewater met the national standard after biochemical treatment.
6. a kind of changing food waste into resources treatment process according to claim 5, the hydrolysis acidification pool, contact-oxidation pool
Air Exposure is carried out respectively with the pond MBR, and wherein the aeration quantity in hydrolysis acidification pool is less than other two ponds.
7. a kind of changing food waste into resources treatment process according to claim 6, the coagulative precipitation tank and hydrolysis acidification
Pond is connect with sludge-tank, collects sludge.
8. a kind of changing food waste into resources treatment process according to claim 1, the exhaust gas disposition uses biofiltration
Method, into biological processing unit, utilizes the microorganism in biological processing unit by kitchen exhaust gas into after overregulating temperature and humidity
The odoring substance in simultaneously waste gas decomposition is absorbed, exhaust gas qualified discharge is completed.
9. a kind of changing food waste into resources treatment process according to claim 8, the biological processing unit set for inside
There is the bacteria bed for the solid carrier for covering with microorganism.
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Cited By (18)
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| CN109940030A (en) * | 2019-04-22 | 2019-06-28 | 张宏亮 | Method for processing kitchen waste |
| CN110143717A (en) * | 2019-04-30 | 2019-08-20 | 贵州民族大学 | A kind of integrated processing system of house refuse |
| CN110523745A (en) * | 2019-08-19 | 2019-12-03 | 深圳市新舟生物科技有限公司 | A kind of device and its technique quickly handling organic waste with carbonaceous rubbish |
| CN111003887A (en) * | 2019-12-11 | 2020-04-14 | 广东迈洁尔生物环保科技有限公司 | Kitchen waste wastewater treatment process |
| CN111233528A (en) * | 2020-03-15 | 2020-06-05 | 上海龙马环境科技有限公司 | Kitchen waste aerobic fermentation system and technology |
| CN111392987A (en) * | 2020-04-26 | 2020-07-10 | 北京国能中电节能环保技术股份有限公司 | Distributed kitchen equipment wastewater treatment method and treatment system |
| CN111408600A (en) * | 2019-12-11 | 2020-07-14 | 广东迈洁尔生物环保科技有限公司 | Kitchen waste treatment process |
| CN111632995A (en) * | 2020-05-29 | 2020-09-08 | 蔚复来(浙江)科技股份有限公司 | Resourceful treatment method and system for kitchen waste |
| CN111760871A (en) * | 2020-05-14 | 2020-10-13 | 浙江青草地环境科技有限公司 | On-site treatment method of kitchen waste |
| CN111842414A (en) * | 2020-06-30 | 2020-10-30 | 北京中科工匠科技有限公司 | Distributed kitchen waste disposal system and method |
| CN112191650A (en) * | 2020-08-07 | 2021-01-08 | 蔚复来(浙江)科技股份有限公司 | Resourceful treatment system and method for kitchen waste |
| CN112430135A (en) * | 2020-11-24 | 2021-03-02 | 北京建筑大学 | Wet garbage reinforced thermal hydrolysis-high temperature aerobic fermentation treatment system and method |
| CN112501214A (en) * | 2020-11-24 | 2021-03-16 | 北京建筑大学 | Two-phase anaerobic treatment system and method for reinforcing wet garbage in villages and towns |
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| CN113172069A (en) * | 2021-04-06 | 2021-07-27 | 杭州楠大环保科技有限公司 | Kitchen waste treatment method |
| CN115140890A (en) * | 2022-06-27 | 2022-10-04 | 华沃德源环境技术(济南)有限公司 | Kitchen waste pretreatment method |
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