Background technology
Pulping technique is exactly by raw materials such as the stalk of plant, branch, trunks, is removed the materials such as xylogen wherein and pectin, obtain the process of fibrous matter by degraded (or dissociating).Fiber is the main component of papermaking.
In pulping process, fiber be isolated, first will these non-fibrous material strippings, obtaining fiber is exactly slurrying purpose.
According to the present situation of the current slurrying industry of China, be applied in production and mainly occupy an leading position with chemical pulp, the waste liquor contamination sublimity that chemical pulp produces in producing, damage to land, polluted air; In slurrying, add a large amount of sodium hydroxide (caustic soda), also use chemical noxious element in bleaching process, producing waste liquid cannot all recycle.And it is high to consume energy, power consumption and water consumption large; All using a large amount of electricity in whole production process, causing and becoming power consumption rich and influential family.Waste liquid blowdown flow rate is large; The waste liquid that cannot recycle can only outwards discharge.Do not meet national energy-saving and reduce discharging policy.Material can not reach Efficient Cycle recycling.Chemicals cannot be separated from waste liquid, and organism and chemicals mix, and organism also cannot be reused, and causes a large amount of loss.
Therefore, be necessary exploitation bio-pulping technology, fundamentally solve a pollution difficult problem for pulping and papermaking industry.Bio-pulping technology is adopted although also have in prior art, but the biological bacteria usually adopted is whiterot fungi or actinomycetes, although it makes moderate progress relative to traditional chemical pulping technology, but still there is long reaction time, obtained fiber fineness is low, yield is low defect, be difficult to be applied to actual production.Therefore, still need the biological bacteria that exploitation is new further, improve bio-pulping process, to overcome above-mentioned defect, and realize energy-saving and emission-reduction, water-saving simultaneously, reduce production cost and the rate of utilization of raising material.
Summary of the invention
The object of the invention is to overcome the chemical pulping method of prior art and the above-mentioned defect of bio-pulping method, a kind of new slurrying biological bacteria is provided.Contriver, by long screening operation, obtains the biological bacteria that can realize foregoing invention object being suitable for bio-pulping.
Particularly, the invention provides a kind of composite flora, it comprises preserving number is that the Tangshan Lay mattress of CGMCCNo.5972 is write from memory the Pseudomonas fluorescens (Pseudomonasfluorescens) that acinetobacter lwoffii (Acinetobacterlwoffii) that Salmonella (Rheinheimeratangshanensis), preserving number be CGMCCNo.5973, preserving number be CGMCCNo.5974.
Described composite flora can be used in the slurrying of biological bacteria liquid.
The present invention also provides a kind of biological bacteria liquid pulping method, and it mainly comprises step:
1) configuration of bacterium liquid: above-mentioned composite flora is configured to the composite bacteria aqueous solution according to following mass ratio, is bacterium liquid:
Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 1-3:1-2:1-2;
2) Feedstock treating: by segment or section after woody raw material peeling, or herbaceous material is cut into chunks, the raw material cut is put into fermentation vat swollen;
3) slurrying, it comprises step:
Discongest: by the raw material thread rolling of swollen and/or crowded stone roller;
Biological degradation: by the raw material soaking after discongesting in the bacterium liquid configured;
Wet sterilization: to be pulled out from bacterium liquid by the raw material after above-mentioned biological degradation, draining, passes into water vapor sterilizing;
Corase grind slurry: the raw material after sterilizing is carried out one section of corase grind slurry, become fibrous bundle;
Fine grinding is starched: above-mentioned one section of corase grind slurry is carried out two sections of fine grinding slurries, makes fibrous bundle be dispersed into single fiber;
Addition in pulp: screen, be filtered through one section of corase grind slurry and two sections of fine grindings slurry after slurry in fibrous bundle, defibrination makes it make single fiber again;
Disappear latent, pulp washing: in warm water, soak, above-mentioned obtained paper pulp for cardboard processed.
Wherein, the density of the bacterium liquid formed in step 1) is more than 6,000 ten thousand/ml bacterium.
Wherein, step 2) in, the woody raw material length cut is 3-4cm, and the herbaceous material length cut is 4-5cm.The described swollen time is 10-12h.
Wherein, the biological degradation temperature described in step 3) remains on 35-40 DEG C, time 32-36 hour.The mass ratio of the raw material after discongesting and bacterium liquid is 1:6-8.Described steam sterilizing is water at atmospheric pressure steam sterilizing 10-30 minute.
Further, step 2) in soak the soak solution after raw material through flocculation, precipitation, supernatant liquor recycling, the fermentation of throw out input methane-generating pit produces biogas.
The advantage of biological bacteria liquid pulping method provided by the invention is: 1) free from environmental pollution: waste liquid directly changes into organic fertilizer, reaches zero release, no pollution.2) bio-pulping can play a protective role to fiber, and compared with traditional chemical process, Whole fiber and half fiber can all reclaim by present method, therefore improve slurry yield.Energy consumption 30% is reduced than traditional slurrying; Paper pulp yield improves 20-25%.3) bio-pulping carries out lignin degradation at ambient pressure, energy-conservation, reduce discharging, low-carbon (LC).4) production cost is low, high financial profit.The cardboard adopting this biological bacteria liquid pulping method to prepare reaches the above level of AA level.
Byproduct of the present invention is transported to settling tank flocculation, precipitation, and supernatant liquor returns second stage employ, remakes presoak and uses.Containing nutrient for plants such as gas chromatography and N, P, K such as abundant xylogen in throw out, throw out mixes, acidifying with old bacterium liquid (raw material thickness bacterium liquid of repeatedly degrading, also containing N, P, K, Fe and trace element) again, then together enter in marsh gas fermentation pool, produce biogas.By the Boiler Ash mixing granulation of natural pond slag, natural pond liquid and pulverizing, make granular organic fertilizer, finally dispatch from the factory, realize zero release.
The biological flora that the present invention obtains through creating work for a long time by providing above-mentioned contriver, perfect further existing bio-pulping technology, reduce the reaction times, improve purity and the yield of obtained fiber, this technology can be applied on a large scale in actual production.Applying biological bacterium of the present invention at short notice in degrading plant body xylogen produce paper pulp, papermaking, byproduct twice transformation becomes biogas, biogas coal supply, gas boiler for dual purpose combustion heating, saves coal consumption.Finally, natural pond slag makes organic fertilizer, defines the economic circulation new model of " material organic transformation ", reaches no waste discharge, namely zero release.Fundamentally solve a pollution difficult problem for pulping and papermaking industry.Energy-saving and emission-reduction, water-saving, reduces production cost, improves the rate of utilization of material.
For above and other objects of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and coordinate accompanying drawing, be described in detail below.
Embodiment
The configuration of embodiment 1 bacterium liquid
The biological flora adopted in the present invention on April 6th, 2012 at China Committee for Culture Collection of Microorganisms's common micro-organisms center (CGMCC, No. 3, Yard 1, BeiChen xi Road, Chaoyang District, Beijing City) preservation, it comprises preserving number is that the Tangshan Lay mattress of CGMCCNo.5972 is write from memory the Pseudomonas fluorescens (Pseudomonasfluorescens) that acinetobacter lwoffii (Acinetobacterlwoffii) that Salmonella (Rheinheimeratangshanensis), preserving number be CGMCCNo.5973, preserving number be CGMCCNo.5974.
Above-mentioned composite flora is configured to the composite bacteria aqueous solution according to following mass ratio, is bacterium liquid:
Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 1-3:1-2:1-2; The density of the bacterium liquid formed is more than 6,000 ten thousand/ml bacterium, for subsequent use.
The biological bacteria liquid slurrying of the woody raw material of embodiment 2
Be raw material with caragana microphylla, illustrate biological bacteria liquid pulping method when adopting woody raw material.All the other woody raw materials, the bio-pulping method of such as willow, eucalyptus can refer to this technique and carries out.When wherein adopting caragana microphylla, composite flora is configured according to following mass ratio: Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 1:2:2; When adopting willow, composite flora is configured according to following mass ratio: Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 2:1:2; When adopting eucalyptus, composite flora is configured according to following mass ratio: Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 2:1:2.
Specifically please refer to Fig. 1, the flow process of biological bacteria liquid pulping method is divided into three phases: preparatory stage, slurrying workshop section and byproduct workshop section.
(1) preparatory stage: 1-4
1)-2): the caragana microphylla that harvesting is returned is carried out the separation of skin bar.Adopt winnowing machine or other mechanical separation.After skin bar is separated, skin is inputted organic feed workshop processing feed, the bar after decortication inputs next program.
3) by bar segment on cutting machine, length is 3-4 ㎝, angle as well, to increase infiltrating area.
4) the branch section input after decortication is soaked in storehouse or fermentation vat carry out washing, cold soaking, first washed away by the foreign material such as raw material appearance earth, soak, water temperature is natural temperature simultaneously, the time to soak into, swollen is as the criterion, 10-12h.After liquid muddiness after repeatedly soaking, carry out flocculating, supernatants after precipitation can also reuse.The fermentation of throw out input methane-generating pit, produces biogas.
Above four steps can be intermittent types also can be linkage type.
(2) slurrying workshop section: 5-12
5) discongest: the branch section of swollen input thread-rolling machine or squeeze is ground, kneading machine carrys out innovation wood segment structure, makes it loose one-tenth wood wool shape, be conducive to biological bacteria infiltration, play its Degradation.
6) biological degradation: the raw material input biological bacteria after discongesting degraded in storehouse or tank, be immersed in the bacterium liquid of embodiment 1 preparation, the mass ratio of the raw material after discongesting and bacterium liquid is 1:6, and temperature remains on 35-40 DEG C, time 32-36 hour.Under the condition of biological bacteria, there is xylogen degradation reaction, play its single-minded effect.
7) wet sterilization: after raw materials pretreatment completes, pulls out raw material from bacterium liquid, draining, is input in steam cabin, passes into the sterilizing in 10-30 minute of water at atmospheric pressure steam.Raw material is inputted paste roller mill by lower end.
8) corase grind slurry: carry out one section of corase grind slurry by the raw material input high-density paste mill after sterilizing, become coarse fiber bundle.
9) fine grinding slurry: enter high-density paste mill again from the coarse particles of above-mentioned output and carry out fine grinding slurry, make fibrous bundle be dispersed into single fiber.
10) addition in pulp: in the slurry after two sections of defibrinations, containing minority fibrous bundle, need through screening, filter tow, defibrination reaches single fiber again.
11) disappear latent, pulp washing: the paper pulp after corase grind slurry and fine grinding slurry, and by mechanical friction, major part is bended, torsional deformation, soaks the fiber flexure eliminated defibrination and cause, make it to unfold in warm water.
12) cardboard processed: by the pulping liquor of above-mentioned preparation input paper machine, cardboard processed after the technical process such as copy paper.
(3) byproduct stage: A-C
In A, 3, isolated caragana microphylla skin contains abundant nutritive ingredient, and microbe conversion becomes ox, sheep feed.
After liquid muddiness through repeatedly soaking, washing in B, 4, through flocculation, precipitation, supernatant liquor recycling, the fermentation of throw out input methane-generating pit produces biogas, passes into coal gas boiler for dual purpose and does fuel, can play effect of energy.
C, biological organic fertilizer: the natural pond slag after methane-generating pit fermentation, natural pond liquid are abundant biological organic fertilizers, liquid topdresses as farm crop and flower nutrient solution uses, and solid granulation is made base manure and used, and is all green fertilizers.
After defibrination, paper physical property index determining result please refer to following table 1, and every data have reached excellent fluting board AA level level (table 3) all:
Table 1
The biological bacteria liquid slurrying of embodiment 3 herbaceous material
Be raw material with wheat straw, illustrate biological bacteria liquid pulping method when adopting herbaceous material.All the other herbaceous material, the bio-pulping method of such as wheat straw, straw, cornstalk can refer to this technique and carries out.
When wherein adopting wheat straw, composite flora is configured according to following mass ratio: Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 2:1:2; When adopting straw, composite flora is configured according to following mass ratio: Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 3:1:2; When adopting cornstalk, composite flora is configured according to following mass ratio: Tangshan Lay mattress is write from memory Salmonella: acinetobacter lwoffii: Pseudomonas fluorescens is 2:2:1.
Specifically please refer to Fig. 2, the flow process of biological bacteria liquid pulping method is divided into three phases: preparatory stage, slurrying workshop section and byproduct workshop section.
(1) preparatory stage: 1,4
Wheat straw is cut into the segment of 4-5cm, input soak in storehouse or fermentation vat carry out washing, cold soaking, first washed away by the foreign material such as raw material appearance earth, soak, water temperature is natural temperature simultaneously, the time to soak into, swollen is as the criterion, 10-12h.After liquid muddiness after repeatedly soaking, carry out flocculating, supernatants after precipitation can also reuse.The fermentation of throw out input methane-generating pit, produces biogas.
(2) slurrying workshop section: 5-12 and (three) byproduct stage: A-C is with embodiment 2, and wherein used biological bacteria such as embodiment 1 does not repeat them here, and wherein during biological degradation, the mass ratio of the raw material after discongesting and bacterium liquid is 1:8.
After defibrination, paper physical property index determining result please refer to following table 2.
Table 2
The quality index of table 3 Corrugating Base Paper
Although the present invention discloses as above with preferred embodiment; so itself and be not used to limit the present invention; any person of ordinary skill in the field; without departing from the spirit and scope of the present invention; when doing a little change and improvement, therefore protection scope of the present invention is when being as the criterion depending on the claim person of defining.