CN110216126A - A kind of method of house refuse sub-prime resource utilization - Google Patents
A kind of method of house refuse sub-prime resource utilization Download PDFInfo
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- CN110216126A CN110216126A CN201910409787.XA CN201910409787A CN110216126A CN 110216126 A CN110216126 A CN 110216126A CN 201910409787 A CN201910409787 A CN 201910409787A CN 110216126 A CN110216126 A CN 110216126A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 39
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 39
- 238000012216 screening Methods 0.000 claims abstract description 25
- 239000002054 inoculum Substances 0.000 claims abstract description 18
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 claims abstract description 17
- 235000002017 Zea mays subsp mays Nutrition 0.000 claims abstract description 17
- 235000005822 corn Nutrition 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 17
- 239000010907 stover Substances 0.000 claims abstract description 15
- 238000007873 sieving Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 240000008042 Zea mays Species 0.000 claims description 15
- 230000004151 fermentation Effects 0.000 claims description 11
- 238000000855 fermentation Methods 0.000 claims description 10
- 238000009264 composting Methods 0.000 claims description 8
- 238000009423 ventilation Methods 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 238000013022 venting Methods 0.000 claims description 4
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- 239000010794 food waste Substances 0.000 abstract description 5
- 238000000926 separation method Methods 0.000 abstract description 5
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- 238000010564 aerobic fermentation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
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- 230000017525 heat dissipation Effects 0.000 description 4
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
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- 241000196324 Embryophyta Species 0.000 description 1
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- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
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- 239000004615 ingredient Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 239000010977 jade Substances 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 235000021049 nutrient content Nutrition 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F9/00—Fertilisers from household or town refuse
- C05F9/04—Biological compost
-
- 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
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
-
- 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
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Biochemistry (AREA)
- Biotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to field of environment engineering, disclose a kind of method of house refuse sub-prime resource utilization, include the following steps: for desiccation inoculum to be added in biological dewatered raw material, obtain mixed material；Biological dewatered raw material includes corn stover and house refuse；Mixed material is carried out after mixing it is biological dewatered, and will be biological dewatered after mixed material carry out sieving sorting；The screenings of sieving sorting includes desiccation inoculum.The method of house refuse sub-prime resource utilization provided by the present invention, desiccation inoculum is launched into the mixture of house refuse and corn stover, it carries out again biological dewatered, effectively raise the efficiency of separation of rubbish, the rubbish of nondegradable flammable big component and biodegradable food waste class can effectively be sieved, provide technical support for subsequent house refuse sub-prime resource utilization.
Description
Technical field
The present invention relates to field of environment engineering, in particular to a kind of method of house refuse sub-prime resource utilization.
Background technique
With the raising of urbanization and living standards of the people, the yield of domestic waste is growing day by day.2015, China
The house refuse amount of clearing is up to 2.15 hundred million tons (China Statistical Yearbook in 2018).Wherein, sanitary landfills, burning and other processing modes
The quantity of refuse of processing is respectively 55.9%, 39.3% and 2.5%.Sanitary landfills and burning are current main processing modes.I
The characteristics of state's domestic waste, predominantly food waste class garbage content increased, and accounts for about 40~60%, reaches as high as 80%, so that raw
Msw water content living is generally 60~80%.However, due to living habit, shortage classification consciousness etc., big and medium-sized cities life
Rubbish source classification is poor, mainly based on mixed collection, has cell portion although original-source by classification has been carried out, in collection
In the process, it can also be mixed with other rubbish.Domestic garbage mixing is collected and mixed processing is still that China's domestic rubbish disposal is existing
Shape.If however, high-moisture percentage composting directly landfill can generate a large amount of percolate and constantly discharge foul gas and
Greenhouse gases become serious pollution source；If, since house refuse Lower heat value is lower, making to burn thermal energy for burning
Utilization rate reduces, or even needs to add auxiliary material and could burn.House refuse complicated components, according to current classification standard, main point
For rubbish from cooking and other rubbish.Obviously, restrict and influence domestic garbage resource using principal element be do not carry out effectively
Moisture content caused by classifying is high, prevent degradable rubbish from cooking is from obtaining suitable recycling treatment mode.It is this mixed
The house refuse of the high-moisture of conjunction makes any trash processing way all there is larger problem.The composition and property of front end rubbish
Matter seriously constrains the resource utilization efficiency of rear end.
Therefore, it is the mechanical sorting efficiency for improving house refuse, can first carries out the pretreatment for reducing moisture content, then divided
Class.Studies have shown that the reduction of house refuse moisture content is remarkably improved refuse classification efficiency.Biological drying technology, it is outer without consumption
Source thermal energy vaporizes moisture, passes through pressure using the aerobic heat for decomposing release of organic matter biodegradable in organic materials
Ventilating convection carries away the vapor after vaporization, is a kind of method that organic materials moisture content is effectively reduced.It is biological dewatered
The adaptability of technology is stronger, lower to house refuse composition requirement, commonly used in the country such as Europe, garbage derivatived as preparing
Fuel (RDF) or the preprocessing means of waste incineration.The research of the biological dewatered reduction moisture content of related house refuse both at home and abroad compared with
It is more, but be concentrated mainly on and explore the biological dewatered technological parameter of house refuse, the moisture content of the house refuse after desiccation can be bright
It is aobvious to reduce, it can be burned.But after house refuse is carried out biological dewatered pretreatment by also non-someone's concern, carry out mechanical point
The physical property and resource utilization potentiality of oversize and screenings are explored in choosing.
Summary of the invention
(1) technical problems to be solved
In view of above-mentioned technological deficiency and application demand, the application proposes a kind of side of house refuse sub-prime resource utilization
Method, is sorted by biological dewatered and sieving, sub-prime resource utilization is carried out to oversize and screenings, to solve existing life rubbish
The low problem of rubbish treatment effeciency.
(2) technical solution
To solve the above problems, the present invention provides a kind of method of house refuse sub-prime resource utilization, including walk as follows
It is rapid:
Desiccation inoculum is added in biological dewatered raw material, mixed material is obtained；The biological dewatered raw material includes jade
Rice stalk and house refuse；
The mixed material is carried out after mixing it is biological dewatered, and will be biological dewatered after the mixed material carry out
Sieving sorting；The screenings of the sieving sorting is the desiccation inoculum.
Further, the oversize of the sieving sorting is flammable non-degradable rubbish, the screenings of the sieving sorting
For organic degradable garbage.
Further, the screening partial size of the sieving sorting is 35~45mm.
Further, biological dewatered period is primary at interval of turning in 2 to 4 days.
Further, biological dewatered fermentation period is 12 days, and the fermentation temperature greater than 55 DEG C at least maintains 5 days.
Further, progress is biological dewatered further comprises: using continuous forced ventilation mode, rate of venting 0.5L
kg-1DM·min-1, it is biological dewatered after the mixed material moisture content be lower than 25%.
Further, the partial size of the corn stover be 1~3cm, moisture content be 5~10%, bulk density be 150~
170kg·m-3。
Further, the house refuse is composting, and moisture content is 60%~75%, and bulk density is 600~750kg
m-3。
Further, the wet basis of house refuse described in the desiccation raw material and corn stover proportion is 9:1.
Further, the moisture content of the desiccation inoculum is 20% hereinafter, the additive amount of the desiccation inoculum is institute
State the 5% of the weight in wet base of mixed material.
(3) beneficial effect
The present invention provides a kind of method of house refuse sub-prime resource utilization, and desiccation inoculum is launched to house refuse
It in the mixture of corn stover, then carries out biological dewatered, effectively raises the efficiency of separation of rubbish, it can will be nondegradable
The rubbish of flammable big component and biodegradable food waste class is effectively sieved, and is subsequent house refuse sub-prime resource utilization
Technical support is provided.In addition, this method is easy to operate, easy, and it is low to bioconversion raw material and process conditions requirement, have good
Environmental benefit and economic benefit, have good promotional value.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the flow diagram of the method for house refuse sub-prime resource utilization provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of house refuse and cornstalk biological desiccation temperature change；
Fig. 3 is the schematic diagram of house refuse and cornstalk biological desiccation water-cut variation.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The embodiment of the present invention provides a kind of method of house refuse sub-prime resource utilization, as shown in Figure 1, this method includes
Following steps:
Step S1: desiccation inoculum is added in biological dewatered raw material, obtains mixed material；Biological dewatered raw material includes
Corn stover and house refuse.
Wherein, house refuse and corn stover are biological dewatered raw material, and the partial size of corn stover is 1~3cm, and moisture content is
5~10%, bulk density is 150~170kgm-3.House refuse is composting, and moisture content is 60%~75%, bulk density 600
~750kgm-3.Corn stover additive amount is the 10% of biological dewatered raw material weight in wet base, i.e., house refuse and corn in desiccation raw material
The wet basis proportion of stalk is 9:1.The moisture content of desiccation inoculum is 20% hereinafter, the additive amount of desiccation inoculum is mixed material
Weight in wet base 5%.
Step S2: mixed material is carried out after mixing it is biological dewatered, and will be biological dewatered after mixed material carry out
Sieving sorting；The screenings of sieving sorting includes desiccation inoculum.
Wherein, biological dewatered aerobic fermentation is carried out after mixing.Biological dewatered period is primary at interval of turning in 2 to 4 days, preferably
It is 3 days.The biological dewatered period is 12 days, wherein the fermentation temperature greater than 55 DEG C at least maintains 5 days or more.Carry out it is biological dewatered into
One step includes: using continuous forced ventilation mode, rate of venting 0.5Lkg-1DM·min-1, it is biological dewatered after mixture
The moisture content of material is lower than 25%.
Wherein, be sieved sorting screening partial size be 35~45mm.Preferably, the mixed consumer waste after biological dewatered is adopted
It is sieved with the screening plant of 40mm partial size, oversize is flammable non-degradable rubbish, can be used as garbage derivatived fuel, under sieve
Object is organic degradable garbage, can be used as afforestation overburden soil.
The method of house refuse sub-prime resource utilization provided in an embodiment of the present invention launches desiccation inoculum to life
It in rubbish and the mixture of corn stover, then carries out biological dewatered, effectively raises the efficiency of separation of rubbish, can not drop
The flammable big component of solution and the rubbish of biodegradable food waste class are effectively sieved, and are subsequent house refuse sub-prime recycling
Offer technical support is provided.In addition, this method is easy to operate, easy, and it is low to bioconversion raw material and process conditions requirement, have
Good environmental benefit and economic benefit have good promotional value.
According to one embodiment of present invention, little Wu base refuse classification in house refuse Beijing used in test turns
0~80mm partial size section composting of fortune station screening, corn stover is derived from village experiment station in China Agricultural University, through pre-treatment wind
Dry doubling is mechanically pulverized to 1~3cm.Desiccation product inoculum is house refuse after biological dewatered pretreatment and being sieved
Screenings part, moisture content be lower than 20%.House refuse and corn stover are mixed in the ratio of 90:10, are in addition added again mixed
The desiccation product inoculation of material 5% is closed, material is sufficiently mixed uniformly.The initial character of biological dewatered raw material is as shown in table 1.
1 starting material physicochemical properties of table
Note:aBased on weight in wet base；bBased on dry weight.
The biological dewatered fermentation cabin that experimentation uses is having a size of 1.04m × 1.0m × 1.4m (length × width × height), volume
About 1.4m3.Fermentation cabin generally brick mix structure, top are open.Bottom is the reinforced plastic plate with airing hole, small
Bore dia 3mm, the 5% of the empty total floor space of area Zhan.Fermentation cabin front can load and unload plank by 7 pieces and form, and convenient for input and output material and turn over
Heap.Fermentation cabin is for simulating the center portion that oxygen lacks the most in strip style aerobic fermentation.It is supplied, is led to using air compressor
Spinner flowmeter control flow is crossed, duration of ventilation is automatically controlled by throttle valve.It is recorded using temperature feedback automatic control system
The temperature of heap body.6 temp probes are prevented altogether, and center places 1 at the 20cm of fermentation cabin bottom, the every increase of height
20cm places 1, and temp probe position is respectively the basic place at 120cm at 20,40,60,80,100 and 120cm of orlop
In heap surface layer.Using ventilation 55 minutes during test, stop 5 minutes interval ventilating modes, rate of venting 0.5Lkg- 1DM·min-1, experimental period is 12 days, every turning in 3 days 1 time.
Since fermentation heap body volume is larger, material is more, and composting complicated composition, and partial size is inconsistent, in order to accurate
Heap body moisture content is calculated, it is identical as thermal stratification, take different layers material to measure moisture content daily, every layer of left, center, right takes 1 point.
Take 3 × 7=21 point measurement different location water-cut variation altogether daily.
Take solid-like in artificial turning in 0,3,6,9,12 and 15 day respectively, solid-like chooses upper layer, middle layer, lower layer and
Aggregate sample, while each layer solid sample and mixing sample are subjected to the screening of 40mm partial size, oversize is mainly plastics, stationery, wood
The nondegradable flammable big component ingredient such as bamboo, fiber.Screenings has been beyond recognition physical composition by aerobic fermentation, mainly
For the mixture of rubbish from cooking degradable in composting and auxiliary material stalk.
Mixing sample is duplicate, and a sample is dried under the conditions of 105 DEG C with baking oven, measures moisture content；Another part
Natural air drying crosses 0.5mm sieve, for measuring volatile solid (VS), total carbon (TC), total nitrogen (TN) and calorific value after smashing.Solid phase
Volatile solid (VS) content uses Muffle furnace calcination method, in 550 DEG C of calcination 6h to constant weight；The measurement of calorific value uses oxygen bomb formula weight
Heat meter (ZDHW-YT8000, China)；All product are for measuring maturity indexes, including pH value, EC value, E4/E6 and GI under sieve.
Each index determining method: pH value and conductivity (EC) are measured using the standard method of NY525 organic fertilizer；Germination percentage assessment of indices
Method bibliography；TC and TN measurement is using elemental analyser measurement (Elementar Analysensysteme, Hanau, moral
State).
Fig. 2 shows that temperature rose to 50 DEG C or more at biological dewatered the 1st day.At biological dewatered first 4 days, each layer temperature of heap body
Degree difference is smaller, and organic matter, which is degraded rapidly, increases each layer temperature rapidly.Occurs temperature ladder each layer temperature since the 5th day
Degree, waste height is higher, and temperature is higher.Due to being aerated from heap body bottom, bottoms material ventilation is higher, therefore the high 20cm of heap
The temperature of layer is significantly lower than the temperature of its upper materials.Since the 8th day, each layer temperature started to reduce, and waste height is higher,
Temperature is higher, forms top-down temperature gradient, and bottom temperature is minimum.Entire heap body mean temperature between high 40cm and
Centre, the substantially temperature at heap body center at 60cm.Therefore, in the actual production process in order to avoid the appearance of heap body is larger
Temperature gradient, continuous turning need to be carried out, turn pile frequency can be shortened in cooldown period.
Fig. 3 shows that domestic garbage mixing material lower layer material (40cm or less) moisture content is integrally lower than average moisture content, on
Layer material (80cm or more) moisture content is integrally higher than average moisture content.With the progress of biological dewatered reaction, moisture content gradually drops
Low, material average moisture content is reduced to 25.02% from initial 57.04%.Moisture content changes over time the expression of useable linear equation
For y (moisture content/%)=- 2.6912x (time/day)+59.152, relative coefficient reaches R2=0.963.Biological dewatered process
Middle moisture content changes with time can be indicated with linear equation, preferable with the measured data goodness of fit.
Biological dewatered process materials volume and mass change, moisture removal amount and organic matter degradation amount, biological dewatered index,
And product higher calorific value and Lower heat value variation are shown in Table 2.As can be seen that initial total material weight in wet base is 496kg, it is born by 15
After object desiccation, loss of weight 267kg, weight reduces 53.86%.Moisture content is reduced to 22.78% by initial 57.04%, aqueous
Rate reduces 60%, and moisture removal rate reaches 81.57%.VS content is reduced to 70.1% by initial 75.2%, reduces 5 hundred
Branch, VS degradation rate are 22.68%.Calculate to obtain the removable 6.35 kilograms of moisture of biological dewatered process degradation per kilogram VS.Finally
Product higher calorific value is 15204kJkg-1, 8.12% is reduced compared with starting material higher calorific value, although organic in material
Matter degradation rate is 22.68%, but due in composting plastics calorific value it is higher, with organic matter during biological dewatered
Degradation, the relative amount of plastics will increase, therefore higher calorific value reduction is not obvious.Due to a large amount of removals of moisture, finally
The Lower heat value of product dramatically increases, by initial 3415kJkg-1, increase to 9784kJkg-1, MSW heating value is complete
Autoignition conditions all can be reached, do not need addition combustion adjuvant, while more heat transfer can also be discharged for generating electricity, can be used as substitution
The garbage derivatived fuel of coal, petroleum etc..
The variation of the biological dewatered effectiveness indicator of table 2
Biological dewatered process heat production and heat dissipation are shown in Table 3.As can be seen that biodegradable heat production is mainly used for moisture evaporation
It heats up with material, the 65% of the total heat dissipation of moisture evaporation latent heat Zhan, material heating sensible heat (∑ Qsoild+∑Qwater) the total heat dissipation of Zhan
26.19%, wherein the 13.85% of the total heat dissipation of turning process losses heat Zhan.If by the mixture of 1t house refuse and stalk
Moisture content is reduced to 25% from 60%, about needs to evaporate 490kg moisture, and according to moisture, average evaporation is latent during biological dewatered
Heat (2400kJkg-1) calculate, need 1178400kJ heat.Therefore, result of study, the material content of organic matter is 75%, organic
Matter degradation rate is calculated according to 25%, co-degradation 75kg organic matter, according to 23.5MJkg-1BVS is calculated, and can produce heat is
1762500kJ.Therefore, when 65% or more heat production is used for evaporation water, it can be achieved that house refuse moisture content is dropped to from 60%
25%, and the period is 12 days.Therefore, only not aqueous by biological drying technology reduction house refuse by other heat drying means
Rate is technically feasible.
The biological dewatered process heat of 3 pilot plant test of table generates and consumption
After biological dewatered pretreatment, screenings is mainly organic degradable part, and mixed material passes through 40mm partial size point
Screenings rotten degree situation is shown in Table 4 after choosing.As can be seen that screenings Lower heat value also can achieve the condition of spontaneous combustion, it can be direct
For burning disposal.Screenings is not up to completely decomposed but substantially decomposed.The agricultural needs of screenings, which further monitor, to be divided
Analysis, but screenings can be used for the greenings such as gardens and lawn use.Biological dewatered process is utilized for domestic garbage resource and is mentioned
It has supplied compared with more options.
The variation of 4 screenings maturity indexes of table
It in general, can direct burning disposal through biological dewatered pretreated house refuse, it can also be used to prepare rubbish
Rubbish derivatived fuel；In the area for not having burning condition, landfill disposal can be directly carried out, percolate will not be generated, will not be dissipated
Stink of pollutant.Through biological dewatered pretreated house refuse, since moisture content reduces, degree of adhesion drop between each component
It is low, while aerobic fermentation process makes organic materials partial size become smaller, and is remarkably improved mechanical sorting efficiency, sieves through 40mm partial size
Afterwards, degradable substance and nondegradable flammable big component can be subjected to machine classification.Oversize is the higher rubbish combustion of calorific value
Material, screenings basically reach decomposed, and organic matter and nutrient content are all higher, can be used for cultivation matrix and greening.
In conclusion the method for house refuse sub-prime resource utilization provided in an embodiment of the present invention, by desiccation inoculum
It in the mixture for launching house refuse and corn stover, then carries out biological dewatered, effectively raises the efficiency of separation of rubbish,
The rubbish of nondegradable flammable big component and biodegradable food waste class can effectively be sieved, oversize can be used as rubbish
Rubbish fuel, screenings can be used for cultivation matrix and greening, provide technical support for subsequent house refuse sub-prime resource utilization.It should
Method is easy to operate, easy, low to bioconversion raw material and process conditions requirement, has good environmental benefit and economic effect
Benefit has good promotional value.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creativeness
Labour in the case where, it can understand and implement.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of method of house refuse sub-prime resource utilization, which comprises the steps of:
Desiccation inoculum is added in biological dewatered raw material, mixed material is obtained；The biological dewatered raw material includes corn stalk
Stalk and house refuse；
The mixed material is carried out after mixing it is biological dewatered, and will be biological dewatered after the mixed material be sieved
Sorting；The screenings of the sieving sorting includes the desiccation inoculum.
2. the method for house refuse sub-prime resource utilization according to claim 1, which is characterized in that the sieving sorting
Oversize be flammable non-degradable rubbish, it is described sieving sorting screenings be organic degradable garbage.
3. the method for house refuse sub-prime resource utilization according to claim 2, which is characterized in that the sieving sorting
Screening partial size be 35~45mm.
4. the method for house refuse sub-prime resource utilization according to claim 1, which is characterized in that biological dewatered period
It is primary at interval of turning in 2 to 4 days.
5. the method for house refuse sub-prime resource utilization according to claim 1, which is characterized in that biological dewatered hair
The ferment period is 12 days, and the fermentation temperature greater than 55 DEG C at least maintains 5 days.
6. the method for house refuse sub-prime resource utilization according to claim 5, which is characterized in that carry out biological dewatered
Further comprise: using continuous forced ventilation mode, rate of venting 0.5Lkg-1DM·min-1, it is biological dewatered after it is described
The moisture content of mixed material is lower than 25%.
7. the method for house refuse sub-prime resource utilization according to claim 1, which is characterized in that the corn stover
Partial size be 1~3cm, moisture content be 5~10%, bulk density be 150~170kgm-3。
8. the method for house refuse sub-prime resource utilization according to claim 7, which is characterized in that the house refuse
For composting, moisture content is 60%~75%, and bulk density is 600~750kgm-3。
9. the method for house refuse sub-prime resource utilization according to claim 8, which is characterized in that the desiccation raw material
Described in the wet basis proportion of house refuse and the corn stover be 9:1.
10. the method for house refuse sub-prime resource utilization according to claim 1, which is characterized in that the desiccation connects
The moisture content of kind object is 20% hereinafter, the additive amount of the desiccation inoculum is the 5% of the weight in wet base of the mixed material.
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