CN104550199A - Recycling treatment method for kitchen wastes - Google Patents
Recycling treatment method for kitchen wastes Download PDFInfo
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- CN104550199A CN104550199A CN201410847761.0A CN201410847761A CN104550199A CN 104550199 A CN104550199 A CN 104550199A CN 201410847761 A CN201410847761 A CN 201410847761A CN 104550199 A CN104550199 A CN 104550199A
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Abstract
The invention innovatively provides a method for preparing a protein foamer from kitchen wastes and a recycling and classifying treatment method for the kitchen wastes. The method comprises the following steps: adjusting the moisture content of the kitchen wastes to be 80-90%, adding an alkaline chemical agent, and heating for hydrolysis; cooling, performing solid-liquid separation to obtain solid residues, adjusting the pH value to be 7-8, utilizing the solid residues as a fertilizer, and performing centrifugation and oil removal on supernatant liquor; recovering grease separated after centrifugation and oil removal, utilizing the grease as a raw material of biodiesel, and performing membrane concentration on mixed liquor subjected to centrifugation and oil removal to obtain protein molecules with the molecular weight of 5-20 kDa and protein molecules with the molecular weight of lower than 5 kDa respectively, wherein the protein molecules with the molecular weight of 5-20 kDa form protein concentrated liquor as the protein foamer, and the protein molecules with the molecular weight of lower than 5 kDa form protein concentrated liquor as a liquid organic fertilizer. The method innovatively provided by the invention can enable the kitchen wastes to generate a high-added-value recycling product after being treated and to be more fully utilized.
Description
Technical field
The invention belongs to rubbish from cooking processing technology field, is specifically related to a kind of recycling processing method of rubbish from cooking.
Background technology
In recent years along with the fast development of China's economy, improving constantly of living standards of the people, the generation of rubbish from cooking increases year by year, brings white elephant to the domestic rubbish disposal in city.Meanwhile, the unsafe reason mode that is located in comes back to dining table become a great society problem as changed into waste oil.How effectively to process rubbish from cooking, do not cause new health threat while allowing it turn waste into wealth, this is the target that numerous researcher makes great efforts.
The main processing ways of current China rubbish from cooking is still mixed into consumer waste filling and embedding or burning, not only causes the waste of resource, too increases domestic rubbish disposal difficulty and expense.Rubbish from cooking complicated component, outstanding behaviours is that moisture content is high, the content of organic matter is high, protein ingredient is complicated, make the technology that some are newly developed, there are some problems in the process Land use systems as is produced from natural pond in rubbish from cooking anaerobic digestion, bacteria agent makes bio-feritlizer or biological feedstuff etc. single: the biological inoculum complicated difficult of (1) rubbish from cooking is to ensure safety; (2) complexity of protein ingredient causes the overall resource utilization rate of single process Land use systems low, lower in the utilization rate in high additive value field; (3) organic high-load and complexity easily make biological treatment system be subject to larger impact, drop into and maintenance cost high, treatment effeciency is low.
The problems referred to above directly limit and constrain the application of existing rubbish from cooking treatment technology, how scientific and reasonable, process rubbish from cooking and make it to obtain omnibearing application cost-effectively, become the key of rubbish from cooking treatment technology.
Summary of the invention
The object of the invention is to provide a kind of method that rubbish from cooking prepares protein foaming agent, can the albumen of separating-purifying specific composition be utilized more fully at value segment as blowing agent.The process comprised is: rubbish from cooking moisture content is adjusted to 80-90%, add basic agent, heating makes it hydrolysis and completes, Separation of Solid and Liquid is carried out after cooling, supernatant carries out centrifugally straining oil, mixed liquor carries out film and concentrates, molecular cut off forms albumen dope at the protein molecular of 5-20kDa, is the material that can be used as protein foaming agent.
Concrete, the process that the described method utilizing rubbish from cooking to prepare protein foaming agent comprises is: rubbish from cooking moisture content is adjusted to 80-90%, add the basic agent of amount of dry matter 5-20% and make it to mix, be heated to 120-170 DEG C make it hydrolysis and complete, Separation of Solid and Liquid is carried out after being cooled to 50-80 DEG C, supernatant carries out centrifugally straining oil under 2500-3000r/min rotating speed, after straining oil mixed liquor carry out at 36 ± 1 DEG C film concentrate, retain through filter cloth, microfiltration membranes and milipore filter after elder generation, obtain the albumen dope of molecular weight of albumen at 5-20kDa.
Wherein, the method that described rubbish from cooking prepares protein foaming agent is also included in before the adjustment of rubbish from cooking moisture content, first carries out broken bag, primary dcreening operation, carries out the step pulverized after removing the impurity such as polybag.After obtaining the albumen dope of molecular weight of albumen at 5-20kDa, evaporation and concentration can also be carried out to it, and then acquisition protein concentration is the protein concentrated solution of 25%.The steam obtained in this evaporating concentration process can reclaim, and for heat temperature raising or the insulation of hydrolytic process, or for the adjustment to rubbish from cooking moisture content, realizes recycling.
Wherein, described basic agent can be NaOH, CaO, Na
2cO
3, Ca (OH)
2one or several pharmaceutical mixture.
Wherein, rubbish from cooking hydrolytic process one complete in a kettle..Under the condition of 120-170 DEG C, hydrolysis time is preferably 20-120min.Hydrolytic process can make the hydrolysis of organic matter of 40-50% in rubbish from cooking become solubility small organic molecule to enter liquid phase, and in the liquid of formation, protein content is about 2.5-3.5%, is also dissolved with the nutriments such as a large amount of nitrogen, phosphorus, potassium and amino acid in liquid phase simultaneously.After thermokalite hydrolysis, pathogen complete inactivation in rubbish from cooking, organic matter is cleared up and stabilisation.
Wherein, described Separation of Solid and Liquid process one complete in frame system; Describedly centrifugally strain oily process one completes in centrifuges.Also can recovery section heat in temperature-fall period before Separation of Solid and Liquid, return reactor for heat temperature raising or insulation.
Wherein, after straining oil mixed liquor carries out film and concentrates and can ensure not damage filter membrane optimum filtration effect simultaneously at 36 ± 1 DEG C.Preferred film concentration process is for first to use 75 μm of (200 order) filter-cloth filterings by Impurity removal, then microfiltration membranes (ceramic composite membrane is used, pore size filter 0.2 μm) retain more than 20kDa viscosity material that is large, easily blocking milipore filter, finally utilize milipore filter (molecular cut off 5kDa) to be retained by the larger molecular organicses such as molecular weight more than 5000 albumen.100 tons of moisture content can form in the rubbish from cooking of about 85% the albumen dope (5-20kDa) about 20 tons that protein content is 4-6% concentration, can be formed after evaporation and concentration protein concentration be 25% protein concentrated solution be about 3-4 ton.
Another object of the invention is to provide a kind of rubbish from cooking resource hierarchical processing method, being included in above-mentioned rubbish from cooking prepares in the process of protein foaming agent, the solid residue produced after Separation of Solid and Liquid is adjusted to after 7-8 as fertilizer utilization through pH, using centrifugal strain oil after the oil recovery that is separated utilizes as the raw material of biodiesel, film to be concentrated afterwards and molecular weight of albumen reclaims at the albumen dope that the molecular weight of albumen that the albumen dope of 5-20kDa obtains is less than 5kDa simultaneously and is used as liquid organic fertilizer.
Wherein, the pH of described solid residue regulates and can adopt the slant acidity such as vinasse, furfural organic waste, not only regulates the pH value of solid residue but also can utilize other organic waste.In described solid residue, the content of organic matter is stable and moderate, and moisture content is moderate, directly can use as fertilizers input, improve plant soil condition, continually and steadily for plant provides all kinds of nutriments needed for growth, and be beneficial to absorbing fast of plant.
Wherein, describedly centrifugally strain in oily process, relative to one processing mode, the oil recovery rate of the invention can improve 20-30%, and the rubbish from cooking of 100 tons of moisture content 85% about can extract grease 3.6 tons.
Wherein, be less than in the protein solution of 5kDa at molecular weight, also be rich in the nutriments such as inorganic ions, small molecular protein, polypeptide and the amino acid being easy to plant absorption, efficient concentrated liquid fertilizer is can be used as after further evaporation and concentration, not only safe and efficient but also energy-conserving and environment-protective, the steam obtained in evaporating concentration process can reclaim, for heat temperature raising or the insulation of hydrolytic process, or for the adjustment to rubbish from cooking moisture content, realize recycling.100 tons of moisture content can form in the rubbish from cooking of about 85% the albumen dope (< 5kDa) about 60 tons that protein content is 1.5-2% concentration, can be formed after evaporation and concentration protein concentration be 25% protein concentrated solution be about 3-4 ton.
The invention rubbish from cooking resource hierarchical processing method, can make the resource utilization rate of rubbish from cooking reach more than 99% relative to prior art, and wherein the utilization rate of value segment can reach more than 30%.Owing to have employed the classification utilization of resources, make organic matter complicated in rubbish from cooking obtain classification, and make the product after classification be applied to the suitableeest field respectively, and obtain higher utilization rate in the suitableeest field.The method technical process that the invention adopts is simple, is easy to operate and control, and can realizes recycling of the resource such as steam, water, reduces energy consumption.The method of the invention also avoid the complex control to biosystem in biological fermentation process, reduces operation and maintenance cost.Rubbish from cooking as the invention part prepares the method for protein foaming agent, and the recycling for rubbish from cooking provides a kind of new direction and approach, and output is high, and product foaming effect is remarkable, can be widely used in industrial scale.
Detailed description of the invention
Below by specific embodiment, the invention is further described.
First the rubbish from cooking of collection is carried out broken bag, primary dcreening operation, pulverizes after removing the impurity such as polybag, then with partially recycled evaporation condensed water, its moisture content is adjusted to 85%, and utilize the temperature of evaporation condensed water 80 DEG C that temperature more than kitchen is adjusted to 60 DEG C.
Add the basic agent of amount of dry matter 15%, as CaO, NaOH etc., fully stir 30 minutes, make fully to mix more than medicament and kitchen.
Be heated to 120 DEG C in a kettle., react after 100 minutes, complete the hydrolysis of rubbish from cooking, in rubbish from cooking, the hydrolysis of organic matter of 50% becomes solubility small organic molecule to enter liquid phase, and in the liquid of formation, protein content is about 3.5%.
Rubbish from cooking after hydrolysis is cooled to after temperature 50 C through pressure release, enter frame system and carry out Separation of Solid and Liquid, solid residue pathogen reduction and innoxious, moisture content after high-temperature process are reduced to 40%, organic matter clears up 50% and stabilisation, as fertilizer utilization after pH is adjusted to 8;
Solid residue pH regulates and adopts the slant acidity such as vinasse, furfural organic waste, not only regulates the pH value of solid residue but also can utilize other organic waste.
The supernatant of Separation of Solid and Liquid enters centrifuge, and speed setting, at 2500-3000rpm, carries out centrifugally straining oil, extracts oil and is used as the raw material of the goods such as biodiesel.
Straining the liquid after oil adopts film method for concentration to carry out separating-purifying, by partial reflux and heat exchange mode, filtration temperature is adjusted to 36 ± 1 DEG C, first use 75 μm of (200 order) filter-cloth filterings by Impurity removal, then microfiltration membranes (ceramic composite membrane is used, pore size filter 0.2 μm) to retain more than 20kDa viscosity large, the material of easy blocking milipore filter, milipore filter (molecular cut off 5kDa) is finally utilized to be retained by the larger molecular organicses such as molecular weight more than 5000 albumen, form the albumen dope (5-20kDa) that protein content is 4-6% concentration, albumen dope carries out evaporation and concentration further, forming protein concentration is the protein concentrated solution of 25%, this protein concentrated solution can be used as blowing agent raw material and utilizes, meanwhile, form the organic matter and the albumen filtered solution that are less than 5kDa, concentration is at 1.5-2%, and through further evaporation and concentration, forming protein concentration is the protein concentrated solution of 25%, is applied to landscape flower, agricultural etc. as liquid organic fertilizer.
The foul smell produced in whole processing procedure, through collecting laggard row relax, processes rear discharge up to standard.
The waste water produced after decline evaporation condensed water and backwash reaches after sewer discharge standard through water treatment system and enters sewage network.
Claims (9)
1. a rubbish from cooking prepares the method for protein foaming agent, rubbish from cooking moisture content is comprised the steps: to be adjusted to 80-90%, add basic agent, heating makes it hydrolysis and completes, Separation of Solid and Liquid is carried out after cooling, supernatant carries out centrifugally straining oil, obtain mixed liquor and carry out film and concentrate, molecular cut off forms albumen dope at the protein molecular of 5-20kDa.
2. a kind of rubbish from cooking according to claim 1 prepares the method for protein foaming agent, rubbish from cooking moisture content is comprised the steps: to be adjusted to 80-90%, add the basic agent of amount of dry matter 5-20% and make it to mix, be heated to 120-170 DEG C make it hydrolysis and complete, Separation of Solid and Liquid is carried out after being cooled to 50-80 DEG C, supernatant carries out centrifugally straining oil under 2500-3000r/min rotating speed, after straining oil mixed liquor carry out at 36 ± 1 DEG C film concentrate, through filter cloth after elder generation, microfiltration membranes and milipore filter retain, obtain the albumen dope of molecular weight of albumen at 5-20kDa.
3. a kind of rubbish from cooking according to claim 1 prepares the method for protein foaming agent, comprises the steps: to carry out broken bag, primary dcreening operation to rubbish from cooking, pulverizes after removing the impurity such as polybag; Rubbish from cooking moisture content is adjusted to 80-90%, add the basic agent of amount of dry matter 5-20% and make it to mix, be heated to 120-170 DEG C and make it hydrolysis, make the organic matter of 40-50% in rubbish from cooking enter liquid phase and form protein content and be about the liquid of 2.5-3.5%; Separation of Solid and Liquid is carried out after being cooled to 50-80 DEG C; Supernatant carries out centrifugally straining oil under 2500-3000r/min rotating speed; After straining oil mixed liquor carry out at 36 ± 1 DEG C film concentrate, first use 75 μm of filter-cloth filterings by Impurity removal, then the protein molecular of more than 20kDa is retained by microfiltration membranes, finally utilize milipore filter to be retained by the larger molecular organicses such as molecular weight more than 5000 albumen, obtain the albumen dope of molecular weight of albumen at 5-20kDa.
4. a kind of rubbish from cooking according to any one of claim 1-3 prepares the method for protein foaming agent, carries and being characterised in that: described basic agent is NaOH, CaO, Na
2cO
3, Ca (OH)
2one or several pharmaceutical mixture.
5. a rubbish from cooking resource hierarchical processing method, comprises the steps: rubbish from cooking moisture content to be adjusted to 80-90%, adds basic agent, and heating makes it hydrolysis and completes; Carry out Separation of Solid and Liquid after cooling, obtain solid residue and be adjusted to as fertilizer utilization after 7-8 through pH, obtain supernatant and carry out centrifugally straining oil; Using centrifugal strain oil after the oil recovery that is separated utilize as the raw material of biodiesel, strain the mixed liquor after oil and carry out film by centrifugal and concentrate, obtain molecular weight respectively and form at the protein molecular of 5-20kDa the protein molecular that albumen dope and molecular weight be less than 5kDa and form albumen dope.
6. a kind of rubbish from cooking resource hierarchical processing method according to claim 5, rubbish from cooking moisture content is comprised the steps: to be adjusted to 80-90%, add the basic agent of amount of dry matter 5-20% and make it to mix, being heated to 120-170 DEG C and making it hydrolysis and complete; Carry out Separation of Solid and Liquid after being cooled to 50-80 DEG C, obtain solid residue and be adjusted to as fertilizer utilization after 7-8 through pH, obtain supernatant and carry out centrifugally straining oil under 2500-3000r/min rotating speed; Using centrifugal strain oil after the oil recovery that is separated utilize as the raw material of biodiesel, by centrifugal strain the mixed liquor after oil carry out at 36 ± 1 DEG C film concentrate, retain through filter cloth, microfiltration membranes and milipore filter after elder generation, obtain molecular weight respectively and form at the protein molecular of 5-20kDa the protein molecular that albumen dope and molecular weight be less than 5kDa and form albumen dope.
7. a kind of rubbish from cooking resource hierarchical processing method according to claim 5, comprises the steps: to carry out broken bag, primary dcreening operation to rubbish from cooking, pulverizes after removing the impurity such as polybag, rubbish from cooking moisture content is adjusted to 80-90%, add the basic agent of amount of dry matter 5-20% and make it to mix, be heated to 120-170 DEG C and make it hydrolysis, make the organic matter of 40-50% in rubbish from cooking enter liquid phase and form protein content and be about the liquid of 2.5-3.5%, Separation of Solid and Liquid is carried out after being cooled to 50-80 DEG C, solid residue be adjusted to as fertilizer utilization after 7-8 through pH, obtain supernatant and carry out centrifugally straining oil under 2500-3000r/min rotating speed, using centrifugal strain oil after the oil recovery that is separated utilize as the raw material of biodiesel, by centrifugal strain the mixed liquor after oil carry out at 36 ± 1 DEG C film concentrate, first use 75 μm of filter-cloth filterings by Impurity removal, then the protein molecular of more than 20kDa is retained by microfiltration membranes, milipore filter is finally utilized to be retained by the larger molecular organicses such as molecular weight more than 5000 albumen, obtain the albumen dope of molecular weight of albumen at 5-20kDa, obtain molecular weight respectively to form at the protein molecular of 5-20kDa the protein molecular that albumen dope and molecular weight be less than 5kDa and form albumen dope, then respectively evaporation and concentration is carried out to two kinds of albumen dopes, obtain the molecular weight of albumen that can be used as blowing agent is less than 5kDa protein concentrated solution at the protein concentrated solution of 5-20kDa and the molecular weight that can be used as liquid organic fertilizer respectively.
8. a kind of rubbish from cooking resource hierarchical processing method according to any one of claim 5-7, is characterized in that: described basic agent is NaOH, CaO, Na
2cO
3, Ca (OH)
2one or several pharmaceutical mixture.
9. a kind of rubbish from cooking resource hierarchical processing method according to any one of claim 5-7, is characterized in that: the pH of described solid residue regulates and can adopt the slant acidity such as vinasse, furfural organic waste.
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| CN201410847761.0A CN104550199B (en) | 2014-12-29 | 2014-12-29 | Rubbish from cooking recycling processing method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567242A (en) * | 2016-02-22 | 2016-05-11 | 天津市裕川环境科技有限公司 | Soil conditioner and application thereof |
| CN109081758A (en) * | 2018-09-30 | 2018-12-25 | 上海集熠节能环保技术有限公司 | The production method and energy fertilizer finished product of kitchen garbage production small molecule organic energy fertilizer |
| CN112077125A (en) * | 2020-09-15 | 2020-12-15 | 四川同益环境科技有限责任公司 | Energy treatment method for household garbage |
| WO2021119950A1 (en) * | 2019-12-16 | 2021-06-24 | 上海集熠节能环保技术有限公司 | Method for producing small-molecule organic energy fertilizer from kitchen waste and energy fertilizer product |
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| CN102310069A (en) * | 2010-07-02 | 2012-01-11 | 上海鑫禄环保科技有限公司 | Restaurant and kitchen waste integrated treatment method |
| EP2407255A1 (en) * | 2009-03-12 | 2012-01-18 | Carlos Romero Batallan | Method for operating a facility for the biomethanisation of solid organic waste and facility for same |
| CN102343354A (en) * | 2011-06-22 | 2012-02-08 | 浙江爱科乐环保有限公司 | High-energy quantum water splitting treatment method for solid wastes |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2003088833A (en) * | 2001-09-20 | 2003-03-25 | Mitsubishi Heavy Ind Ltd | Organic waste treatment equipment |
| CN1546682A (en) * | 2003-12-16 | 2004-11-17 | 天津大学 | Process of continuous production of casein bioactive peptide by enzymolysis and filtering membrane concentration |
| EP2407255A1 (en) * | 2009-03-12 | 2012-01-18 | Carlos Romero Batallan | Method for operating a facility for the biomethanisation of solid organic waste and facility for same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567242A (en) * | 2016-02-22 | 2016-05-11 | 天津市裕川环境科技有限公司 | Soil conditioner and application thereof |
| CN109081758A (en) * | 2018-09-30 | 2018-12-25 | 上海集熠节能环保技术有限公司 | The production method and energy fertilizer finished product of kitchen garbage production small molecule organic energy fertilizer |
| WO2021119950A1 (en) * | 2019-12-16 | 2021-06-24 | 上海集熠节能环保技术有限公司 | Method for producing small-molecule organic energy fertilizer from kitchen waste and energy fertilizer product |
| CN112077125A (en) * | 2020-09-15 | 2020-12-15 | 四川同益环境科技有限责任公司 | Energy treatment method for household garbage |
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| CN104550199B (en) | 2018-09-28 |
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