CN104928324A - Household garbage and corn stalk biological treatment method - Google Patents
Household garbage and corn stalk biological treatment method Download PDFInfo
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- CN104928324A CN104928324A CN201410107661.4A CN201410107661A CN104928324A CN 104928324 A CN104928324 A CN 104928324A CN 201410107661 A CN201410107661 A CN 201410107661A CN 104928324 A CN104928324 A CN 104928324A
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Classifications
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
-
- 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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- Processing Of Solid Wastes (AREA)
Abstract
A household garbage and corn stalk biological treatment method is as follows: household garbage is transported through a collection transportation truck into a pit in the ground of a household garbage receiving station, and primarily selected, then organic waste is separated as a biogas material; during harvesting of corn in harvest season by use of a harvester, green corn stalks cut are into 30-50mm long, and conveyed to an ensiling pool for ensiling; the separated organic waste and the ensiled corn stalks are in batch evenly mixed with the front batch biogas residue, filled into a dry fermentation tank, and sprayed with a leachate for inoculation and humidifying and sealed anaerobic fermentation to produce methane gas, by 25-30 days of medium temperature fermentation at 35-38 DEG C, each ton of the household garbage and the corn stalks can produce 120-150m<3> of biogas; the dry fermentation tank is designed in the manner of modular multi-cell recycling to keep the household garbage treatment and biogas production continuity. The produced methane gas is stored in a gas storage cabinet for pressure swing adsorption purification compression to be used as a vehicle fuel and for canning to be used as life energy; and after anaerobic fermentation, the biogas residue is discharged from the pool, and is prepared into a fertilizer by whole film covering biological aerobic anhydration method. The household garbage and corn stalk biological treatment method has the advantages of less land occupation, harmless treatment, resource utilization, and good social and economic benefits.
Description
Technical field
The present invention relates to one way of life rubbish and maize straw harmless treatment, recycling dry type bio anaerobic fermentation processing method.
Background technology
The quantity of refuse that current China rural area on average produces for each person every day is 0.86 kilogram, and the annual domestic refuse total emission volumn in national rural area 300,000,000 tons, is about 70% to 80% of Municipal Domestic Garbage Output.In addition, the quantity discharged of national rural area feces of livestock and poultry just about has 3,000,000,000 tons, agricultural crop straw year generation about 700,000,000 tons.The many local sanitary fills in rural area are as mountain, and sanitary sewage flows over, and feces of livestock and poultry is seen everywhere, and stalk huddles and leaves about random burning, and river embankment fish is contaminated and dead, some shabby plastic sheeting for farm use plastics, discard the domestic refuses such as shopping bag, dish leaf, melon skin and are seen everywhere.These domestic refuses not only pollute vegetable basket, rice-sack, safe drinking water " lifeblood ", most importantly the ecotope of vast Rural areas is destroyed, have a strong impact on the healthy of broad masses of the people, also may cause various epiphytotics infection and spread simultaneously.
" " 12 " agricultural crop straw comprehensive utilization embodiment " points out that China is large agricultural country, and agricultural crop straw output is large, distribution is wide, kind is many.Adding up national stalk theoretical resources amount in 2010 is according to investigations 8.4 hundred million tons.Stock number can be collected and be about 700,000,000 tons, wherein maize straw 2.73 hundred million tons, a large amount of stalks be precious, causing harm of abandoning.Wherein account for 15.6% as 4,170 ten thousand tons, feed according to the relevent statistics; 2.6% is accounted for, as fuel usage quantity (containing peasant household's tradition heating, stalk emerging energyization utilizes) about 4,860 ten thousand tons as plantation edible mushrooms base-material 7,100,000 tons.Part be used as with stubble also field remainingly abandon in field, roadside limes marginis, every harvest season " prohibit burn " becomes three grades, village of counties and townships leading cadre and to go all out to fight the floods the work of the most important thing, " burn maize straw and impose a fine 2000 yuan; detain 15 days " etc. taboo burning poster to be seen everywhere, have received certain effect, but prohibit after the burning phase, time have the phenomenon of burning to occur, the greenhouse gases contaminate environment that the stalk of the roadside limes marginis abandoned gives out through wind and weather, bubble and underground water source.Current with stubble also field be also a kind of caving-in bash.
Climate change is the significant challenge that the current whole world faces, and low-carbon green development has become the common recognition of countries in the world.The Chinese government clearly proposes to control greenhouse gas emission action target, and the proportion accounting for primary energy source to non-fossil energy in 2020 reaches about 15%, and unit gross domestic product Carbon emission was than reduction by 40%-45% in 2005.Stalk as high-quality biomass energy can Some substitute and save fossil energy, be conducive to improving energy structure, reduce Carbon emission, alleviate and reply Global climate change.State Council's " about accelerating the suggestion advancing agricultural crop straw comprehensive utilization ", proposes the target that stalk comprehensive utilization rate in 2015 reaches more than 80%." 12 " period, greatly develop stalk marsh gas, straw solidification shaped fuel, improve the ratio of renewable energy source in energy structure.
Application number is 200710039019.7, that invents " life refuse processing method " by name patent discloses " one way of life waste disposal method, comprise the steps process: sorting, organism high temperature and high pressure hydrolysis hydrothermal oxidization, organism composting, not recyclable class combustiblematerials fuel brick, inorganics building materials, plastics are granulated, Recyclable regeneration, off gas treatment, sewage disposal, the technological processs such as heating power supply, it is little that the present invention has land occupation area, treatment time is short, avoid polluting, working cost is low, effective process obnoxious flavour, to produce quality product high, the advantage of environment-friendly high-efficiency.The process of various places domestic refuse can be widely used in ".
Chinese patent CN12800384 denomination of invention is patent discloses of " domestic refuse agriculture straw application processing method " " one way of life rubbish, agricultural crop straw application treatment technology; make the multiple terminal products such as organic fertilizer, animal feed, edible mushrooms base-material, clean fuel by humiture effect bottom fermentation in conversion storehouse, the methane recovery produced in fermenting process utilization.Thermal control is supplied at 50-80 DEG C of humiture bottom fermentation " by steam-pipe.And the present invention and CN12800384 " domestic refuse agriculture straw application processing method " public technology it is long unlike the maize straw of viridescent being cut off when harvest corn is gathered in the crops with reaper season 30-50mm, after ensiling again with rubbish combined inoculation bio anaerobic bacterium fermentation methane production, leavening temperature 35-38 DEG C, natural pond slag is as fertilizer.Adopt large fermentating pool shovel loader input and output material, the rubbish of applicable day process 200-1000 ton and corn stalk, daily output biogas 30,000-15 ten thousand m3, biogas as vehicle fuel or life energy, processing method and product summary has basic difference through compression of purifying.
In sum, China rural garbage is polluted and agricultural crop straw pollution is urgently renovated, rural pollution problem has caused the attention of leaders and knowledgeable people, especially proposing " build beautiful China " in " 18 is large " report of party just must first from beautiful environment low-carbon emission, and circular agriculture is done.
Summary of the invention
In order to solve the problem that rural environments pollutes, the invention provides the bioremediation of a kind of residents in rural community and maize straw harmless treatment, recycling.Adopt and rubbish and Silage Corn Straw can be made in this way to obtain high purity methane gas and efficient bio-feritlizer by the fermentation of dry type bio anaerobic.Do not have natural pond liquid discharge without water, do not produce secondary pollution, less investment running cost is low.Biogas is through compression of purifying as automobile-used and life energy, and natural pond fertilizer is used nearby, is convenient to rural promotion and implementation.
To achieve these goals, the present invention is by the following technical solutions:
One way of life rubbish and cornstalk biological treatment process, domestic refuse is transported into rubbish reception melt pit through collecting transport trolley, melt pit ground level place is provided with the double-edged fine-toothed comb to lopsidedness, the upper material conveyer flowed automatically to below melt pit by the rubbish of double-edged fine-toothed comb goes to broken bag trommel screen, iron magnetic separation conveyor gone to by rubbish after primary election, the object being greater than 300mm then flows to large assorted transfer roller and goes to the fragmentation of large grain sieve together with the screen overflow of broken bag trommel screen on double-edged fine-toothed comb, screen overflow is inorganic large assorted, as building backfill or landfill or doing building materials, rubbish after screening goes to pneumatic jig sorting through magnetic separator, ferromagnetic is sent to refuse disposal companies, the lightweight combustiblematerials sub-elected (is moulded, wood, cotton) collect as the warm fuel of dry fermentation pond confession in winter, inorganics sandstone glass does other and uses, organic waste is as marsh gas raw materials, when harvest corn is gathered in the crops with reaper season, the maize straw of viridescent is cut off 30-50mm long, after ensiling again with rubbish combined inoculation bio anaerobic bacterium fermentation methane production, leavening temperature 35-38 DEG C, natural pond slag, as fertilizer, is characterized in that comprising the following steps:
Step 1, refuse classification
Domestic refuse enters the broken sieve of large grain after the primary election of broken bag trommel screen, magnetic separation, proportion pneumatic jig sub-elect inorganic large assorted, combustiblematerials (mould, wood, cotton), inorganics (sand, stone, glass), ferromagnetic metal, and the rubbish filtered out is as dry fermentation marsh gas raw materials;
Step 2, corn straw silage
Harvest season, by the maize straw of viridescent maize harvesting and stalk knife mill, is chopped into 30-50mm and transports silage silo to, preserves as marsh gas raw materials;
Step 3, dry type bio anaerobic ferment
In batches the organic waste of sorting is mixed with the maize straw of ensiling and upper batch natural pond slag, Leachate site inoculation is sprayed into and damping sealing bio anaerobic fermentation generation methane gas with shovel loader loading dry type biological fermentation pond, fermentation vat is designed to the many ponds of modularization and recycles, keep the continuity of refuse treatment and product biogas, the acidifying gas at aerogenesis initial stage is sent to after ultraviolet deodorizer purifies by the diverting valve gone on biogas basin pipeline discharges;
Step 4, methane purification compress
The methane gas that the fermentation of dry type bio anaerobic produces is stored in gas-holder, and through Pressure Swing Adsorption compression CH4 >=95%, calorific value >=31.4MJ, CO2≤3%, H2S≤10ppm, O≤0.5%, makes vehicle fuel and tinning can as life;
Step 5, natural pond slag biology aerobic mummification
After anaerobically fermenting, natural pond slag contains the moisture content of 55-65%, recycles full film and cover biology aerobic mummification method composting after going out pond;
Sieve after step 6, fertilizer
Rubbish moisture content 45-55% before fermentation, only sub-elects magneticmetal thing and inorganic impurity, the natural pond pulp water part 30-35% after mummification.Sub-elect organic impurity again.
According to described domestic refuse and cornstalk biological treatment process, it is characterized in that in step 3 in batches by the organic waste of sorting and the maize straw of ensiling each 50%, add 25-30% Shang batch natural pond slag again to mix, the 65-75% of dry type biological fermentation pool volume is loaded, the fermentation of sealing bio anaerobic with shovel loader.
According to described domestic refuse and cornstalk biological treatment process, it is characterized in that rubbish in step 3 and Silage Corn Straw add the natural pond slag of 25%-30% Shang batch containing bio anaerobic bacterium, the Leachate site sprayed into again containing bio anaerobic bacterium inoculates bio anaerobic bacterium in mixing raw material, and the Leachate site of unnecessary and new generation reclaims inoculation and recycles.
According to described domestic refuse and cornstalk biological treatment process, it is characterized in that in step 3, dry fermentation pond keeps 35-38 DEG C of mesophilic digestion, winter, fermentation insulation only consumed the 3-5% of self production capacity, used the combustiblematerials sub-elected in rubbish just not need to consume the production capacity of self for temperature.
According to described domestic refuse and cornstalk biological treatment process, it is characterized in that acidifying gas and the obnoxious flavour at the initial stage that produces in step 3 are discharged through UV purification at times by the diverting valve of collecting methane pipe network, methane gas content CH4 >=65% of biogas, hydrogen sulfide content H2S≤12 ppm.
According to described domestic refuse and cornstalk biological treatment process, it is characterized in that rubbish per ton and maize straw mixing raw material in step 3, through 25-30 days, biological dry-type anaerobic fermentation produced biogas 120-150m3.
According to described domestic refuse and cornstalk biological treatment process, it is characterized in that dry fermentation pond is designed to multiple being used alternatingly according to the treatment capacity of rubbish, keep the continuity of refuse treatment and product biogas.
Described combined inoculation anerobe, just mixes the flushing liquor adding and spray containing biological bacteria before raw material enters pond with biological bacteria, be the major reason not needing in dry fermentation pond to stir.
According to described domestic refuse and cornstalk biological treatment process, it is characterized in that, described gas-holder, biogas is stored in gas-holder, purifies compression as vehicle fuel and life energy through pressure swing adsorption process.
Beneficial effect of the present invention:
1, innoxious
The closed mechanize sorting of rubbish, does not contact with people, does not burn, and foul smell, through ultraviolet deodorizing not polluted air, not to wash with water or the cornstalk biological dry type bio anaerobic of pyrolysis defibrination and ensiling ferments and do not have natural pond liquid to discharge, not polluted water; Low containing heavy metal in rubbish and stalk mixed fermentation natural pond slag, not contaminated soil.
2, resource utilization
Rubbish and stalk mixed biologic anaerobically fermenting, containing ammonia nitrogen than low, every cube of mixing raw material aerogenesis 120-150m3 high purity methane gas, through pressurization of purifying as vehicle and life energy, it is high that biological dry fermentation fertilizer efficiency is retained in fertilizer efficiency in the slag of natural pond completely.
3, easy practice and extension
Before biological dry type bio anaerobic fermentation, rubbish does not need meticulous sorting, and both saved and manually in turn simplify equipment, Silage Corn Straw serves the effect of ripe corruption in advance, easily, do not add ripe rotten agent and shorten pretreatment period, treatment capacity is large in fermentation, easy to operate, be convenient to practice and extension.
4, investment cost is low
Domestic refuse and Silage Corn Straw and upper batch with the natural pond slag of bacterial classification, the evenly inoculation Leachate site of spray containing large number of biological anerobe is again played in mixing, eliminate stirring, again because dry fermentation saves energy consumption 60% for temperature winter, not only save the investment of equipment but also save working cost.
Accompanying drawing explanation
Fig. 1 is the total technological process figure of domestic refuse of the present invention and cornstalk biological treatment process.
Fig. 2 is the garbage sorting system figure of domestic refuse of the present invention and cornstalk biological treatment process.
Fig. 3 is the corn straw silage system diagram of domestic refuse of the present invention and cornstalk biological treatment process.
Fig. 4 is the technical process refinement figure of domestic refuse of the present invention and cornstalk biological treatment process.
Specific embodiments
Below in conjunction with accompanying drawing, embodiment is illustrated:
As shown in Figures 1 to 4, domestic refuse of the present invention and cornstalk biological treatment process concrete technology step as follows:
1, household garbage sorting system
Domestic refuse is transported into through collecting transport trolley, automatically be discharged into rubbish outside workshop and receive melt pit, melt pit ground level place is provided with the double-edged fine-toothed comb (grid) to lopsidedness, the upper material conveyer flowed automatically to below melt pit by the rubbish of double-edged fine-toothed comb goes to broken bag trommel screen, iron magnetic separation conveyor gone to by rubbish after primary election, the object being greater than 300mm then flows to large assorted transfer roller and goes to the fragmentation of large grain sieve together with the screen overflow of broken bag trommel screen on double-edged fine-toothed comb, screen overflow is inorganic large assorted, as building backfill or landfill or doing building materials.Rubbish after screening goes to pneumatic jig sorting through magnetic separator, and ferromagnetic is sent to refuse disposal companies, and the lightweight combustiblematerials that sub-elects (mould, wood, cotton) is collected as dry fermentation pond winter for warm fuel.Inorganics sandstone glass does other use, and organic waste is as marsh gas raw materials.Because dry fermentation process is not by the impact of inorganics, sorting that for this reason need not be meticulous can meet the demands; Emphasis sub-elects the heavy metal contamination that magneticmetal thing reduces natural pond slag.Garbage sorting system is in a closed workshop, and workshop is provided with the ultraviolet ray deodorization device collecting exhaust.
2, Silage Corn Straw system
Combine harvester or special Green-fodder harvesting machine is adopted season at harvest corn, once complete the chopping of milpa in field and mince is loaded ensiling trailer, transport the blue or green stalk of fresh corn of chopping to silage silo by trailer, through compacting sealing, just complete corn straw silage process.Combining technique has outstanding advantage: one is that production efficiency is high; Two is that operating cost is low.
Corn straw silage pond is built in ground level and is convenient to forklift handling material, rainwater-proof is conducive to a little more than ground at the bottom of pond, silage silo builds up both sides upright wall wall type grooved, and the dark green maize straw through chopping is piled up in groove, with vehicle compacting exhausted air, top, pond plastic covering film is real by soil pressure again, in case air inlet and rainwater, this mode storage capacity is large, and the shelf-time can reach 8 months, go out charging convenient, be applicable to the extensive ensiling of shovel loader operation and utilize.
3, biological dry type anaerobic fermentation system
Rubbish after sorting and the maize straw of ensiling each 1/2nd, add again 25-30% upper batch gone out pond natural pond slag mix, then the 65-75% of dry fermentation pond to pond inner capacities is loaded with shovel, open pond roof spray system, spray into the Leachate site containing bio anaerobic bacterium, sealing bio anaerobic fermentation methane production.This add in mixing raw material on batch natural pond slag reuse and spray Leachate site, it is the bio anaerobic bacterium in order to utilize in natural pond slag and Leachate site, reach and evenly inoculate and regulate the object of humidity, the leachate recirculation of unnecessary and new generation is inoculated to receiver and is recycled, and the first fermentation vat that uses needs cultivation to inoculate bio anaerobic bacterium.Owing to just mixing the Leachate site adding and spray containing biological bacteria before raw material enters pond with biological bacteria, it is the major reason not needing in dry fermentation pond to stir.Dry fermentation pond remains on 35-38 DEG C of temperature and runs, and heat winter and only consume the 3-5% of self production capacity, and wet method will consume self production capacity of 10-30%; The consumption of the combustiblematerials that winter sub-elects for warm boiler then self production capacity is lower.It within 25-30 days, is a treatment cycle, rubbish per ton and mixed stalk raw material produce biogas 120-150m3, general dry fermentation pond is by modular design, tankage can be designed to several 1000-1500m3, the size number of Chi Rong number determine according to the treatment capacity of rubbish and maize straw, the alternate cycles of fermentation vat uses the continuity maintaining refuse treatment and produce biogas.
4, methane purification compression system
Methane purification is a kind of green regenerative energy sources that biogas utilization substitutes Sweet natural gas oil, American-European countries to methane purification technical study comparatively early, Switzerland is country biological methane gas being used for the earliest vehicle energy, the bus of combustion biogas has operated in street corner, capital, and existing 20,000 all kinds of public transit vehicles in Bern use methane gas; The train of first row combustion biogas puts into effect in Sweden in the world.Methane purification compresses and adopts known prior art, and what use at present has the absorption of pressure-variable adsorption, water, thanomin absorption; Thanomin absorption process is the existing carbon dioxide absorption technology in small fertilizer plant of China, uses for reference and utilizes technology maturation.The low methane content of biogas hydrogen sulfide content that dry fermentation is produced highly is collected in biogas storage tank, then through desulfurization and decarburization deoxidation washing pressurization, biogas after purifying, CH
4content brings up to 95% by 65%, calorific value>=31.4MJ, CO
2≤ 3%, H
2s≤10 ppm, O
2≤ 0.5%.Deliver to gas station to use as life for transportation and communication or tinning.
5, the biological dewatered system of natural pond slag
Moisture content containing 55-65% behind Zha Chu pond, natural pond, then decompose mummification further through film covering biology aerobic mummification method, pile the heap body of 3.5 meters high with forklift, wherein lay several oxygen ventilation pipeline and use pipeline and gas blower to air feed in heap body if desired.Cover with politef film, prevent smell and bacterium excessive, form the subenvironment that moisture content and temperature isolates with outside climatic, Uniform Ventilation Secondary Fermentation decomposed even, do not have anaerobic zone to make concentrated fertilizer through decomposition in 8-12 days.The fertilizer efficiency 80% of wet type anaerobically fermenting is in the liquid of natural pond, and dry fermentation does not have natural pond liquid, and fertilizer efficiency is retained in the slag of natural pond completely, directly uses or make Chemical Mixed Fertilizer according to the interpolation N P and K that needs of rational application of fertilizers after screening.
6, separation system after fertilizer
Because dry fermentation is not by the impact of inorganic substance plastics, wooden unit, sandstone, simplifies garbage processing procedure before entering fermentation vat, without the need to too much spending the selected segmentation of people's force-summing device, considerably reducing engineering input cost.Through the natural pond slag water content 30-35% of biology aerobic mummification, natural pond slag relative loose, then carry out rear sieve ratio and be easier to.Natural pond slag after biological dewatered enters the trommel screen with blowing, sub-elects the wooden unit of more than 50mm, foam, large foreign particle and selects the combustiblematerials such as plastics, fiber of lightweight, collect the fuel as the Winter protection heat supply of dry fermentation pond; Inorganic large assorted building of doing backfills or sanitary landfill.
Wherein refuse classification carries out in the workshop closed, foul gas is outer row after negative-pressure air-suction is purified by ultraviolet deodorizing device, rubbish mixes with the maize straw of ensiling and loads the airtight bio anaerobic in dry fermentation pond and ferment, first aerogenesis within 48-72 hour, be acidificatoin time section, do not produce biogas and the acidifying gas that produces by going to the diverting valve of biogas basin tubing system, be sent to ultraviolet deodorizing device in time and discharge through purification.This is that dry fermentation has intermittence and can release obnoxious flavour at times, and the continuity of fermenting with wet type cannot release obnoxious flavour, causes the fundamental difference that methane gas content low in hydrogen sulphide content is high, the methane gas CH that dry fermentation produces
4>=65, H
2s≤12ppm, ensure that the purity of biogas.
The combustiblematerials that winter, fermentation utilized refuse classification to go out for temperature, for the burning of gasification cracking water heater, had both ensured 35-38 DEG C of leavening temperature needed for fermentation vat, had solved smoke emissioning pollution again.
Last it is noted that above-described embodiment only in order to illustrate the present invention and and unrestricted technical scheme described in the invention, although therefore this specification sheets with reference to each above-mentioned embodiment to present invention has been detailed description, but, those of ordinary skill in the art should be appreciated that and still can modify to the present invention or equivalent replacement; And all do not depart from technical scheme and the improvement thereof of the spirit and scope of the present invention, it all should be encompassed in right of the present invention.
Claims (8)
1. one way of life rubbish and cornstalk biological treatment process, domestic refuse is transported into rubbish reception melt pit through collecting transport trolley, melt pit ground level place is provided with the double-edged fine-toothed comb to lopsidedness, the upper material conveyer flowed automatically to below melt pit by the rubbish of double-edged fine-toothed comb goes to broken bag trommel screen, iron magnetic separation conveyor gone to by rubbish after primary election, the object being greater than 300mm then flows to large assorted transfer roller and goes to the fragmentation of large grain sieve together with the screen overflow of broken bag trommel screen on double-edged fine-toothed comb, screen overflow is inorganic large assorted, as building backfill or landfill or doing building materials, rubbish after screening goes to pneumatic jig sorting through magnetic separator, ferromagnetic is sent to refuse disposal companies, the lightweight combustiblematerials sub-elected (is moulded, wood, cotton) collect as the warm fuel of dry fermentation pond confession in winter, inorganics sandstone glass does other and uses, organic waste is as marsh gas raw materials, when harvest corn is gathered in the crops with reaper season, the maize straw of viridescent is cut off 30-50mm long, after ensiling again with rubbish combined inoculation bio anaerobic bacterium fermentation methane production, leavening temperature 35-38 DEG C, natural pond slag, as fertilizer, is characterized in that comprising the following steps:
Step 1, refuse classification
Domestic refuse enters the broken sieve of large grain after the primary election of broken bag trommel screen, magnetic separation, proportion pneumatic jig sub-elect inorganic large assorted, combustiblematerials (mould, wood, cotton), inorganics (sand, stone, glass), ferromagnetic metal, and the rubbish filtered out is as dry fermentation marsh gas raw materials;
Step 2, corn straw silage
Harvest season, by the maize straw of viridescent maize harvesting and stalk knife mill, is chopped into 30-50mm and transports silage silo to, preserves as marsh gas raw materials;
Step 3, dry type bio anaerobic ferment
In batches the organic waste of sorting is mixed with the maize straw of ensiling and upper batch natural pond slag, load the sealing of dry type biological fermentation pond with shovel loader and spray into Leachate site inoculation damping anaerobically fermenting generation methane gas, fermentation vat is designed to the many ponds of modularization and recycles, keep the continuity of refuse treatment and product biogas, the acidifying gas at aerogenesis initial stage is sent to after ultraviolet deodorizer purifies by the diverting valve gone on biogas basin pipeline discharges;
Step 4, methane purification compress
Methane gas is stored in gas-holder, and through Pressure Swing Adsorption compression CH4 >=95%, calorific value >=31.4MJ, CO2≤3%, H2S≤10ppm, O≤0.5%, makes vehicle fuel and tinning can as life;
Step 5, natural pond slag biology aerobic mummification
After anaerobically fermenting, natural pond slag contains the moisture content of 55-65%, recycles full film and covers biology aerobic mummification method composting;
Sieve after step 6, fertilizer
Rubbish moisture content 45-55% before fermentation, only sub-elect magneticmetal thing and inorganic impurity, the natural pond pulp water part 30-35% after mummification sub-elects organic impurity again.
2. domestic refuse according to claim 1 and cornstalk biological treatment process, it is characterized in that in step 3 in batches by the organic waste of sorting and the maize straw of ensiling each 50%, add 25-30% Shang batch natural pond slag again to mix, 2/3 of dry type biological fermentation pool volume is loaded, sealing anaerobically fermenting with shovel loader.
3. domestic refuse according to claim 1 and cornstalk biological treatment process, it is characterized in that rubbish in step 3 and Silage Corn Straw add the natural pond slag of 25%-30% Shang batch containing bio anaerobic bacterium, the Leachate site sprayed into again containing bio anaerobic bacterium inoculates bio anaerobic bacterium in mixing raw material, and the Leachate site of unnecessary and new generation reclaims inoculation and recycles.
4. domestic refuse according to claim 1 and cornstalk biological treatment process, it is characterized in that in step 3, dry fermentation pond keeps 35-38 DEG C of mesophilic digestion, winter, fermentation insulation only consumed the 3-5% of self production capacity, used the combustiblematerials sub-elected in rubbish just not need to consume the production capacity of self for temperature.
5. domestic refuse according to claim 1 and cornstalk biological treatment process, it is characterized in that acidifying gas and the obnoxious flavour at the initial stage that produces in step 3 are discharged through UV purification at times by the diverting valve of collecting methane pipe network, methane gas content CH4 >=65% of biogas, hydrogen sulfide content H2S≤12 ppm.
6. domestic refuse according to claim 1 and cornstalk biological treatment process, is characterized in that rubbish per ton and maize straw mixing raw material in step 3, and through 25-30 days, biological dry-type anaerobic fermentation produced biogas 120-150m3.
7. domestic refuse and cornstalk biological treatment process according to claim 6, is characterized in that dry fermentation pond is designed to multiple being used alternatingly according to the treatment capacity of rubbish, keeps refuse treatment and produces the continuity of biogas.
8. domestic refuse according to claim 1 and cornstalk biological treatment process, is characterized in that, described gas-holder, and biogas is stored in gas-holder, purifies compression as vehicle fuel and life energy through pressure swing adsorption process.
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