CN110479733A - A kind of rubbish from cooking high temperature microbe processing method - Google Patents
A kind of rubbish from cooking high temperature microbe processing method Download PDFInfo
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- CN110479733A CN110479733A CN201910676933.5A CN201910676933A CN110479733A CN 110479733 A CN110479733 A CN 110479733A CN 201910676933 A CN201910676933 A CN 201910676933A CN 110479733 A CN110479733 A CN 110479733A
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- biogas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Abstract
The invention discloses a kind of rubbish from cooking high temperature microbe processing method, including pretreatment system, anaerobic digester system, biogas residue and biogas slurry treatment system and discharge collection system this four most of composition.Application scheme optimizes the process flow for the rubbish that principal component is swill, more enough pointedly to handle rubbish, improves treatment effeciency, while generating more biogas；And the steam that biogas generates can supply itself consumption again again, greatly reduce the energy consumption save the cost；Biogas residue and biogas slurry pass through the treatment process after optimization respectively, can be effectively reduced the destruction to environment.The invention is used for field of garbage disposal.
Description
Technical field
The present invention relates to field of garbage disposal, more particularly to a kind of rubbish from cooking high temperature microbe processing method.
Background technique
At present both at home and abroad rubbish from cooking processing mode mainly have sanitary landfills, burning, anaerobic digestion methane production, at Fertilizer Transformed
Reason, fodder processing and apparatus for disposing of food waste etc. are several, and most domestic city garbage specification effect is bad at present or root
Originally it is not carried out garbage classification, or not specifically for the treatment facility of rubbish from cooking, therefore, rubbish from cooking can only be mingled in
It is handled in house refuse, main processing ways cause garbage disposal difficulty big based on filling and burn, recycling degree
It is low, effect on environment is big.
Main component is swill in rubbish from cooking, but more and more perfect also with certain city's garbage classification, matter of classifying
Measure higher and higher, other impurity contents can be fewer and fewer in rubbish from cooking, and independent recycling system is complicated, operation stability
Difference, economy are little.Therefore, do not consider temporarily individually to recycle other impurities, be that food is residual for main component
The rubbish from cooking of slag carries out technologic optimization.
Summary of the invention
That the purpose of the present invention is to provide a kind of specific aims is stronger, more sufficiently processing rubbish and more sufficiently generates biogas
Rubbish from cooking high temperature microbe processing method.
The technical solution used in the present invention is:
A kind of rubbish from cooking high temperature microbe processing method, comprising the following steps:
S1. pretreatment system, rubbish from cooking sequence pass through pyrohydrolysis and squeeze the treatment process of slurrying, and the step itself produces
Raw foul smell, the foul smell are passed through deodorizing tower；
S2. anaerobic digester system, using the single-phase treatment process of continous way wet type medium temperature, the step itself generate biogas,
Biogas residue and biogas slurry, biogas are stored in methane-generating pit after desulfurization dewatering is handled, send to methane boiler to produce after the pressurization of part biogas and steam
Vapour, part biogas send to biogas generator and produce electric power；
S3. biogas residue and biogas slurry treatment system, biogas residue is successively by dehydration for the first time, the processing of pyrohydrolysis and second of dehydration
Technique, biogas slurry successively pass through the treatment process of MBR biochemistry film reaction and the reaction of RO reverse osmosis membrane；
S4. the step S3 treated biogas residue and biogas slurry are emitted into the external world respectively.
As an improvement of the above scheme, it fills the water, is washed, so into pyrohydrolysis equipment after pyrohydrolysis in the step S1
Mixture is thrown to squeezing pulping equipment again afterwards.
As an improvement of the above scheme, deodorizing tower includes two-stage deodorizing part, the deodorization portion of the first order in the step S1
Part is washing section, and the deodorizing part of the second level is bio-trickling filter.
As an improvement of the above scheme, the single-phase treatment process of continous way wet type medium temperature includes following item in the step S2
Mesh, feeding manner are continous way, and feed solids content is wet type, and for anaerobic reaction controlled at medium temperature, stage of reaction number is single
Phase.
As an improvement of the above scheme, in the step S2 biogas production go out steam supplying step S1 in pyrohydrolysis and
Anaerobic digester system in step S2 itself uses.
As an improvement of the above scheme, in the step S3, dehydration for the first time uses centrifugal dehydrator, and second of dehydration is adopted
Use plate and frame filter press.
As an improvement of the above scheme, the nitrification for having additional two-stage in the step S3 before MBR biochemistry film reaction is anti-
The mixed liquor that the nitration denitrification reactor of nitrator, MBR biochemistry film reaction and the second level generates flows back into first again
Grade nitration denitrification reactor and re-mixed with biogas slurry.
Beneficial effects of the present invention: application scheme optimizes the process flow for the rubbish that principal component is swill, more
It is enough pointedly to handle rubbish, treatment effeciency is improved, while generating more biogas；And the steam that biogas generates can weigh again
Itself consumption is newly supplied, save the cost is greatly reduced the energy consumption；Biogas residue and biogas slurry pass through the treatment process after optimization, energy respectively
It is effectively reduced the destruction to environment.
Detailed description of the invention
The present invention will be further explained below with reference to the attached drawings:
Fig. 1 is the flow chart of a whole set of processing method；
Fig. 2 is the flow chart of biogas slurry treatment.
Specific embodiment
Referring to Figures 1 and 2, the present invention is a kind of rubbish from cooking high temperature microbe processing method, including pretreatment system, is detested
Oxygen digestive system, biogas residue and biogas slurry treatment system and discharge collection system this four most of composition.It is introduced below as sequence
Each part.
1, for pretreatment system.
It is the collection of rubbish first, transports and be thrown to processing workshop, then rubbish from cooking sequence passes through pyrohydrolysis and pressure
Press the treatment process of slurry.Since garbage classification increasingly standardizes, the step for can not increase Bulky Waste sorting process.It needs
It should be noted that the step itself can generate a large amount of foul smell, i.e. garbage truck, weighbridge, discharging hall, waste deposit storehouse and processing
Workshop is required to setting ventilating system and siphons away foul smell, and the foul smell siphoned away is passed through deodorizing tower.
Deodorizing tower includes two-stage deodorizing part, and the deodorizing part of the first order is washing section, i.e. foul smell is passed through in sink；Second
The deodorizing part of grade is bio-trickling filter, and the packing layer of bio-trickling filter is two layers, and upper layer is attached growth of microorganisms area, lower layer
For prewashing area, the effect of prewashing area is mainly dedusting cooling, removes dissolubility stink odor, while increasing the humidity of foul gas,
Guarantee its coming into full contact with upper layer microorganism.
Pyrohydrolysis technology, which refers to, send rubbish from cooking into pyrohydrolysis device, high temperature (150~180 DEG C) high pressure (0.4~
Under 0.8MPa), by the reaction of 1~2h, the process that cell allows intracellular organic solute to flow out simultaneously is destroyed, correspondingly this mistake
Journey can also destroy harmful microorganism.It next is by the rubbish from cooking investment compacting pulping process of upper process, this step carries out
It is separated by solid-liquid separation, the liquid phase after separation is high concentration organic slurry, meets the feed conditions of wet type anaerobic digestion.
Pyrohydrolysis has that adaptability is good, organic matter low to pre-treatment requirement dissolution rate is high, harmless for rubbish from cooking processing
The advantages that change degree is high, system stability is good, can not only stablize quickly makes veterinary antibiotics, plant and animal residues pulp, may be used also
The reaction so that impurity such as polybag shrink etc., high-temperature high pressure water present in hot water solution equipment can assist brokenly completely
Bag, can export rubbish from cooking using this pretreatment mode into equipment in a larger amount.
After pyrohydrolysis is handled, the hydrolysis such as organic moiety such as outer leaf dish leaf, fruit, meat in rubbish from cooking are slurried
Shape is mixed with other solid refuses, needs to be separated by solid-liquid separation using mechanical expression, common squeezing mode has spiral
Extrusion dehydration and hydraulic press dewatering.In conjunction with the characteristics of above two squeezing, application scheme be further combined it is hydraulic squeezing and
Screw extrusion squeezing, forms the better two-stage pressing process of dehydrating effect.Press apparatus adopted here be divided into thick squeezing and
Thin squeezing, two equipment are mainly different with the sieve pore of output end in power.
After but rubbish from cooking is by above-mentioned pyrohydrolysis and press dewatering treatment process, incinerating combustion value has been greatly improved,
Through preresearch estimates, residue calorific value can reach 1700~2100Kcal/kg, close to the incinerating combustion value of lignite inferior, preferably,
It can be fed directly to incineration plant in rubbish after above-mentioned processing and carry out burning production capacity.
Preferably, hydraulic squeezing uses vertical hydraulic press apparatus, because its residue minimizing becomes apparent from, moisture content is more
It is low.
Preferably, being filled the water after pyrohydrolysis into pyrohydrolysis equipment, washed, then mixture is thrown to squeezing system again
Starch equipment.
Rubbish from cooking is after pyrohydrolysis, in the material of discharge, the organic matters such as outer leaf, dish leaf, leftovers leftovers, fruit, leaf
It is slurried into the sticky purees of dark brown, and is adhered on plastics, stationery, fabric and fiber residue, if directly to the mixing
Material carries out press dewatering, it will has large amount of organic to be adhered on solids, the organic matter for being transferred to liquid phase in this way is reduced, money
Source degree reduces, and will increase the moisture content of press residue, increases the disposition difficulty of residue.
Preferably, pyrohydrolysis equipment needs first to rinse before material is discharged, i.e., infused into the clinker storehouse of pyrohydrolysis equipment
Water, and certain liquid level is kept, rubbish from cooking mixes in clinker storehouse with water, and partial impurities can be dissolved in water at this time, later by grabbing
Material is sent into press apparatus by bucket, and filtrate can also take away the impurity for being dissolved in water while flowing away, to substantially reduce residue
In content of organics.
Verified, if the material after pyrohydrolysis directlys adopt hydraulic and screw press and is separated by solid-liquid separation, solid matter subtracts
Quantitative rate is 60~70% or so.Hydraulic and spiral two-stage squeezing decrement rate is carried out afterwards on 67%~75% left side if first washed
The right side, the decrement rate of material can reach 78~85% even higher, and residue moisture content can be down to 50~60% or so, in residue easily
Biodegradable content of organics can be down to 15% or less.Therefore, application scheme is considered as washing squeezing process, has to improve
Machine object dissolution rate increases anaerobic digestion methane yield, while reducing squeezing solid residue moisture content, reduces residue yield, increases
Add residual burning calorific value, improve rubbish from cooking resource utilization degree to the maximum extent in this way, lowers residue outward transport disposition difficulty.
2, for anaerobic digester system.
Using the single-phase treatment process of continous way wet type medium temperature.The single-phase treatment process of continous way wet type medium temperature includes following
Project, feeding manner are continous way, and feed solids content is wet type, and anaerobic reaction is controlled at medium temperature, stage of reaction number
It is single-phase.It gives reasons below.
What anaerobic digester system was handled in application scheme is the organic slurry after rubbish is separated by solid-liquid separation, and moisture content is very high,
If must carry out deep dehydration using dry type anaerobic technique, not only increase investment, but also improve the difficulty of operation, this
Application scheme is obviously not suitable for using dry type anaerobic technique, wet type Anaerobic Digestion high concentration organic slurry, domestic and international project
There are many application case, and technology maturation is reliable, system run all right, and therefore, feasibility study recommends to use wet type anaerobic digestion process
According to the property of anaerobic digestion material in application scheme, mild thermophilic digestion is all feasible in, but high temperature
Anaerobic digestion energy consumption is high, and reaction condition control is complicated, and system stability requirement is stringent, to the more demanding of operational management personnel, one
As less use.And microorganism needed for anaerobic digestion process (including methanogen) overwhelming majority be it is mesothermal, also
It is to say that the microorganism utilized by mesophilic anaerobic digestion is more than thermophilic digestion, it is right and to the more adaptable of environment
The tolerance of harmful substance is higher so that mesophilic anaerobic digestion behave it is more stable than thermophilic digestion, starting be easy,
Easily operated, at present in the treatment plant of external actual motion, mesophilic anaerobic digestion ratio accounts for 62%.Therefore, application scheme
Recommend to use mesophilic anaerobic digestion technique.
Single-phase technique refers to the process of that anaerobic fermentation degradation organic matter carries out in a reactor, and rubbish from cooking is by pre-
Enter fermentor after processing, under the action of anaerobe, organic matter is converted to biogas, and biogas slurry is direct after fermentation
Discharge.Single-phase technique fermentation jar structure is simple, operate conveniently, economic cost it is lower, therefore be widely used, at present Europe 95%
Industrialization anaerobic ferment devices be single-phase technique.Some researches show that with the fermentation of single-phase technique, institute under the conditions of 50 DEG C for the country
Methane production maximum up to 435mL/g-VS, it is external also some researches show that, handle rubbish from cooking using individual event anaerobic fermentation,
Methane production range is between 220~490mL/g-VS.
Anaerobic digester system step itself generates biogas, biogas residue and biogas slurry, and biogas is stored in after desulfurization dewatering is handled
Methane-generating pit, send to methane boiler after the pressurization of part biogas and produces steam, and part biogas send to biogas generator and produces electric power.Due to
The biogas yield of application scheme is very big, and biogas combustion production capacity can satisfy quantity of steam needed for refuse disposal system completely, is
Loss in the conversion of reduction energy, transmission process, biogas production capacity should be preferentially used for consuming in factory, and surplus is sent outside.
3, for biogas residue and biogas slurry treatment system.
Biogas residue is successively by dehydration for the first time, the treatment process of pyrohydrolysis and second of dehydration.It is raw that biogas slurry successively passes through MBR
Change the treatment process of film reaction and the reaction of RO reverse osmosis membrane.
First say biogas residue.Biogas residue and its sludge are mainly the excess sludge that biochemical reaction system generates, and main component is proliferation
Microorganism and biogas slurry in recalcitrant substance, found after analyzing common dewatering technology of mud, centrifugal dehydrator is continuously run
Performance is good, and plate and frame type filter-press dewatering is strong, can be dehydrated biogas residue to 60% hereinafter, by the modified biogas residue of pyrohydrolysis
It is dehydrated through plate and frame filter press, moisture content can be reduced to 40%.Therefore application scheme uses " centrifugal dehydration+mud cake pyrohydrolysis+plate
The combination of frame filter-press dehydration " carries out biogas residue and sludge dewatering.Biogas residue and sludge are dehydrated through centrifugal dehydrator to 80% first
Left and right, then mud cake is delivered to by pyrohydrolysis equipment by conveying equipment and carries out pyrohydrolysis reaction, it is 150~170 DEG C in temperature, pressure
Power is under the action of 0.4~0.7MPa steam, the microbial cell in mud cake is hydrolyzed rapidly, the dissolution of cell slurries, dehydration
Performance substantially improves.The plate and frame filter press that sludge after pyrohydrolysis reacts enters next step is dehydrated to 40% or less.
Besides biogas slurry.Due to the complexity for the waste water quality that rubbish from cooking is overflowed, very high requirement is proposed to treatment process.
For many years, people also gradually recognize that the equipment of unification is difficult to adapt to wastewater treatment comprehensively for technology of garbage disposal development.In addition to close
Membrane technology (including nanofiltration and reverse osmosis etc.), evaporations and concentration, ammonia aeration, A/O, SBR, contact oxidation method for newly increasing over year etc. are respectively
Except kind technique, there are also the combinations of kinds of processes.
Preferably, application scheme combines " MBR+OR " technique, the advantage of membrane bioreactor itself is mainly utilized,
Reach better removal effect in the hydraulic detention time shorter compared to traditional activated sludge process, reduces biochemical reaction body
Product improves biochemical reaction efficiency, is discharged without thallus and suspended matter, therefore is improving system processing capacity and improving effluent quality
Aspect shows very big advantage.
Preferably, this programme design, using level-one forward type denitrification, nitrification postposition mode, secondary reinforcement nitrifies anti-nitre
Change treatment process.Biogas slurry initially enters level-one denitrification pond, sets stirring in slurry device in denitrification pond, anti-by MBR biochemical film
Mixed liquor after answering treatment process to be concentrated is back to denitrification reactor, comes into full contact with biogas slurry, denitrifying microorganism is in anoxic
It is that nitrogen is discharged into atmosphere by nitrate, nitrate reductase under environment.
Preferably, being arranged before biogas slurry enters MBR biochemistry film reaction in application scheme to handle the nitrogen in biogas slurry
Two-stage nitration denitrification reactor.Since the nitration denitrification reactor of the first order undertakes main denitrogenation work while consumption largely
Carbon source, in the secondary reinforcement denitrification stage, organic carbon source content is lower in system, it is understood that there may be the uncoordinated problem of carbon-nitrogen ratio,
To guarantee the denitrifying treatment effect of second level, mating carbon source dosing system in second level denilrification system.
4, for exhaust system.
Treated the biogas residue and biogas slurry are emitted into collecting pit respectively.
Application scheme optimizes the process flow for the rubbish that principal component is swill, more enough pointedly to handle rubbish
Rubbish improves treatment effeciency, while generating more biogas；And the steam that biogas generates can supply itself consumption again,
Greatly reduce the energy consumption save the cost；Biogas residue and biogas slurry pass through the treatment process after optimization respectively, can be effectively reduced to ring
The destruction in border
Certainly, the design creation is not limited to above embodiment, and the combination of the various embodiments described above different characteristic can also
To reach good effect.Those skilled in the art can also make equivalent change on the premise of without prejudice to spirit of the invention
Shape or replacement, these equivalent variation or replacement are all included in the scope defined by the claims of the present application.
Claims (7)
1. a kind of rubbish from cooking high temperature microbe processing method, it is characterised in that the following steps are included:
S1. pretreatment system, rubbish from cooking sequence pass through pyrohydrolysis and squeeze the treatment process of slurrying, and the step itself generates smelly
Gas, the foul smell are passed through deodorizing tower；
S2. anaerobic digester system, using the single-phase treatment process of continous way wet type medium temperature, the step itself generates biogas, biogas residue
And biogas slurry, biogas are stored in methane-generating pit after desulfurization dewatering is handled, send after the pressurization of part biogas to methane boiler and produce steam, portion
Divide biogas to send to biogas generator and produces electric power；
S3. biogas residue and biogas slurry treatment system, biogas residue is successively by dehydration for the first time, the processing work of pyrohydrolysis and second of dehydration
Skill, biogas slurry successively pass through the treatment process of MBR biochemistry film reaction and the reaction of RO reverse osmosis membrane；
S4. the step S3 treated biogas residue and biogas slurry are emitted into the external world respectively.
2. rubbish from cooking high temperature microbe processing method according to claim 1, it is characterised in that: hot in the step S1
It fills the water, is washed into pyrohydrolysis equipment after hydrolysis, then mixture is thrown to squeezing pulping equipment again.
3. rubbish from cooking high temperature microbe processing method according to claim 2, it is characterised in that: removed in the step S1
Smelly tower includes two-stage deodorizing part, and the deodorizing part of the first order is washing section, and the deodorizing part of the second level is bio-trickling filter.
4. rubbish from cooking high temperature microbe processing method according to claim 3, it is characterised in that: connect in the step S2
The single-phase treatment process of continuous rotating vane type medium temperature includes following items, and feeding manner is continous way, and feed solids content is wet type, is detested
Oxygen reaction control temperature is medium temperature, and stage of reaction number is single-phase.
5. rubbish from cooking high temperature microbe processing method according to claim 4, it is characterised in that: natural pond in the step S2
The anaerobic digester system in the pyrohydrolysis and step S2 itself in steam supplying step S1 that gas is produced uses.
6. rubbish from cooking high temperature microbe processing method according to claim 5, it is characterised in that: in the step S3,
Dehydration for the first time uses centrifugal dehydrator, and second of dehydration uses plate and frame filter press.
7. rubbish from cooking high temperature microbe processing method according to claim 6, it is characterised in that: in the step S3
Have additional the nitration denitrification reactor of two-stage before MBR biochemistry film reaction, the nitrification of MBR biochemistry film reaction and the second level is anti-
The mixed liquor that nitrator generates flows back into the nitration denitrification reactor of the first order again and re-mixes with biogas slurry.
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