CN104974938A - Straw saccharification acidification treatment method - Google Patents
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- CN104974938A CN104974938A CN201510314249.4A CN201510314249A CN104974938A CN 104974938 A CN104974938 A CN 104974938A CN 201510314249 A CN201510314249 A CN 201510314249A CN 104974938 A CN104974938 A CN 104974938A
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Abstract
The present invention relates to a straw saccharification acidification treatment method. The method uses efficient acidification flora fermentation broth and a compound additive to conduct saccharification and acidification on straw, so as to rapidly saccharify and acidify the straw, and the solid liquid products are separated after the treatment. The efficient acidification flora fermentation broth is prepared by mixing reaction of a solid phase and a liquid phase separated from the biogas slurry with a composite additive and the straw; and the composite additive comprises CaO and cellulase. The method of the present invention effectively removes cellulose, hemicellulose, lignin and other organic matters in straw, improves the content of monosaccharide in the acidified liquid after treatment and the efficiency of saccharification and acidification, and obtains the intermediate with high concentration and high value, so as to make full use of straw. In addition, the method shortens the straw treatment time, simplifies treatment flow, substantially reduces energy consumption, and is in favor of energy saving and environmental protection and worth great popularization and application.
Description
Technical field
The present invention relates to a kind of straw saccharification acidation treatment method, belong to stalk comprehensive utilization environmental technology field.
Background technology
China is a large agricultural country, and stalk resource enriches, and about has 800,000,000 tons of outputs every year, but because its degraded difficulty, consuming time longer, not good recycling.Carrying out pre-treatment to stalk, is one of effective means improving straw biomass utilization ratio.
Stalk cell wall primarily of Mierocrystalline cellulose, hemicellulose and xylogen composition, three be interweaved composition dense structure, hamper the effect for often kind of composition of enzyme, microorganism or chemical reagent, the degraded of any one composition is subject to the restriction of other compositions.Therefore, lignocellulose dense structure open and degrade be straw biomass transform first step.
No matter traditional stalk anaerobic fermentation system, be a phase or two-phase fermentation, all focus in the output of methane, and have ignored valuable intermediate product.The present invention is lignocellulose fast and effectively in degrading straw and other are organic, obtain the intermediate product of high density high value, and according to actual needs, carry out reprocessing and (after such as carrying out purification, be used as chemosynthesis raw material, obtain bio-ethanol after fermentation, efficient biogas production can certainly be used for).
In view of this, special proposition the present invention.
Summary of the invention
The object of this invention is to provide a kind of straw saccharification acidation treatment method, the method energy consumption is low, the utilization ratio of stalk is high, saccharification result good, can Mierocrystalline cellulose fast and effectively in degrading straw, hemicellulose, xylogen and other are organic, obtain the intermediate product of high density high value.
First, the invention provides a kind of efficient acidifying flora fermented liquid, it is for carrying out saccharification acidification to stalk.
The preparation method of described efficient acidifying flora fermented liquid comprises the following steps:
S1, get natural pond liquid, be separated and concentratedly obtain solid phase and liquid phase;
Described natural pond liquid can be prior art tradition natural pond liquid, is preferably from the natural pond liquid in biogas engineering, is more preferably with stalk the natural pond liquid in the biogas engineering being raw material; Described separation concentrates available vibrational sieve;
S2, by described solid phase acid for adjusting pH to 4-5.5, place 1-3 days, obtained process solid phase; Described acid can be one or more in hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid etc.;
S3, by composite additive, stalk and described liquid phase according to part by weight 1-2: 8-12: 80-120 mix, preferably by weight proportion 1:10:100 mixing, places at least 2 days afterwards obtain straw saccharification liquid; Described composite additive by weight, comprises CaO 5-500 part and cellulase 0.1-10 part; Preferably include CaO 10-250 part and cellulase 0.5-5 part; Preferably include CaO 50 parts and cellulase 1 part further;
S4, described process solid phase is joined in described straw saccharification liquid, regulate initial ph value to be that 6.5-7.5 reacts, until reacted when the content of voltaile fatty acid (VFAs) does not raise, obtain efficient acidifying flora fermented liquid; Preferably until reacted when the content of voltaile fatty acid does not for three days on end raise; Preferably in the efficient acidifying flora fermented liquid process of preparation, (such as step S3 and S4) suitably adds described liquid phase, and the salinity caused with the evaporation kept the skin wet raises.
Secondly, the invention provides a kind of straw saccharification acidation treatment method, comprise and utilize above-mentioned efficient acidifying flora fermented liquid and above-mentioned composite additive to carry out saccharification acidification to stalk; By stalk rapid saccharification, acidifying, after process, be separated solid-liquid product.
Usually, the part by weight of composite additive described in described straw saccharification acidation treatment method, stalk and described efficient acidifying flora fermented liquid is 1-2: 8-12: 1-3; Preferred weight ratio is 1: 8-10: 1-2; Further preferred weight ratio is 1: 9-10: 1.5-2.
Preferably, described straw saccharification acidation treatment method comprises and processing stalk several times, until be disposed up hill and dale by stalk; When the content of voltaile fatty acid does not raise in the liquid of saccharification acidification each time, show that this straw saccharification acidification completes, terminate this straw saccharification acidification; Preferably divide and 5-8 time stalk is processed.
Usually, preferably when the content of voltaile fatty acid does not raise in the liquid of saccharification acidification for three days on end, show that this straw saccharification acidification completes; The time of usually carrying out saccharification acidification for the stalk first time newly added is 15-20 days; Carry out under general normal temperature condition processing.
Generally saccharification acidification is carried out 5-8 time to stalk, stalk can be disposed up hill and dale.The acidification rate of per dry matter stalk can reach more than 70%.
Particularly, liquid phase is isolated after stalk (new) first time is carried out saccharification acidification, add new above-mentioned efficient acidifying flora fermented liquid again and new above-mentioned composite additive continues to carry out saccharification acidification to stalk in solid phase, general circular treatment like this repeatedly, such as 5-8 time, stalk can be disposed up hill and dale.
Usually, solid-liquid product is separated after described saccharification acidification, product liquid is the intermediate product of high density high value, can be according to actual needs, reprocess, be used as chemosynthesis raw material after such as carrying out purification, or obtain bio-ethanol after fermenting further, or for efficient biogas production; Solid product can be used as organic fertilizer (raw material).
Usually, consider transport or the convenience deposited, after efficient acidifying flora fermented liquid of the present invention can first suitably concentrate (as with vibratory screening apparatus), be transported to the place (as field) needed stalk process again; Add water during use and convert to original content, and then mix according to the part by weight of the above composite additive, stalk and efficient acidifying flora fermented liquid.Such as ease of transporting or depositing, described efficient acidifying flora fermented liquid is concentrated 4-5 doubly.
The present invention prepares described efficient acidifying flora fermented liquid stalk used can be identical with described straw saccharification acidation treatment method stalk used kind, also can be different; Preferred stalk kind is identical.
Specifically, described straw saccharification acidation treatment method, comprises the steps:
By above-mentioned composite additive, stalk and above-mentioned efficient acidifying flora fermented liquid by weight proportion for 1-2: 8-12: 1-3 adds reactor, when the content of (preferably for three days on end) voltaile fatty acid does not raise in saccharification acidification liquid (general process 15-20 days), isolate liquid phase; Add new above-mentioned composite additive again and new above-mentioned efficient acidifying flora fermented liquid continues to carry out saccharification acidification to stalk, circular treatment like this 5-8 time.Then solid-liquid product is separated.
Preferably, using stalk as solid phase, using composite additive and efficient acidifying flora fermented liquid as liquid phase, in reactor, solid phase and liquid phase are kept apart by the disrupter of similar filter screen, liquid phase is sprayed solid phase (such as using pump), iterative cycles like this, when the content of voltaile fatty acid does not raise in saccharification acidification liquid (preferably for three days on end) (general first time process needs 15-20 days), isolates liquid phase; Add new composite additive and efficient acidifying flora fermented liquid again to continue to carry out saccharification acidification to stalk, circular treatment like this 5-8 time.Then solid-liquid product is separated.
More specifically, stalk is put into reactor top as solid phase, described composite additive and described efficient acidifying flora fermented liquid are put into reactor lower part as liquid phase, in reactor, solid phase and liquid phase are kept apart by the disrupter of similar filter screen, liquid phase pump is sprayed solid phase, iterative cycles like this; Preferably by the start and stop by liquidometer control pump being located at solid phase and liquid phase respectively; When the content of voltaile fatty acid does not raise in saccharification acidification liquid (preferably for three days on end) (general first time process needs 15-20 days), isolate liquid phase; Add new composite additive and efficient acidifying flora fermented liquid again to continue to carry out saccharification acidification to stalk, circular treatment like this 5-8 time; Be separated solid-liquid product.
Voltaile fatty acid of the present invention (VFAs) content assaying method reference " optimizing research of technic acid parameter is produced in the hydrolysis of bundling wheat straw " (Lv Lili, 2013).Use Stabil-Wax-DA30m*0.53mm*0.25m type capillary column in a particular embodiment, fid detector, temperature programming, with 4-methylvaleric acid for internal standard substance.
The acidification rate method of calculation of per dry matter stalk of the present invention are shown in embodiment part, and the acidification rate of per dry matter stalk can show straw saccharification acidification effect, and acidification rate is higher shows that treatment effect is better.
Described stalk can be one or more in sorghum stalk, cornstalk, straw, rice straw etc.
Usually, described stalk need not be anticipated by the present invention, and (such as shear or pulverize, pyroprocessing, immersion treatment etc.) can realize the object of the invention, therefore the present invention does not do particular determination to it.Meanwhile, if the present invention finds described stalk to anticipate can obtain better saccharification acidizing effect.Preferably stalk is sheared in advance or pulverize as segment (such as length 3cm-5cm), fully contact saccharification acidizing fluid to expand contact area, reduce the treatment time, obtain better saccharification acidification effect.
The advantage of straw saccharification acidation treatment method of the present invention:
The inventive method adopts and adds the method that composite additive and efficient acidifying bacterial strain fermentation liquor combine and process stalk, effectively removes the Mierocrystalline cellulose in stalk, hemicellulose, xylogen and other organic matters, improve the content of monose in the rear acidizing fluid of process and the efficiency of saccharification acidification, obtain the intermediate product of high density high value, stalk is fully used.The inventive method directly can carry out saccharification acidification to raw material in addition, need not soak in advance, generally also need not shear in advance or pulverize, shorten the treatment time, simplify the flow process of process, greatly reduce energy consumption, be conducive to energy-conserving and environment-protective, should vigorously promote the use.
Accompanying drawing explanation
Fig. 1-3 is respectively the acidification rate daily variation diagram of embodiment 6-8 per dry matter stalk.
Fig. 4 is the acidification rate daily variation diagram of comparative example 1 per dry matter stalk.
Embodiment
Following examples for illustration of the present invention, but are not used for limiting the scope of the invention.
Following examples 1-11 and comparative example 1 voltaile fatty acid (VFAs) content assaying method as follows: volatile fat acidity test adopt vapor-phase chromatography measure, use Stabil-Wax-DA30m*0.53mm*0.25m type capillary column, fid detector, temperature programming, with 4-methylvaleric acid for internal standard substance.The quantitative analysis of sample is determined by the size of peak area, and the qualitative analysis of sample is determined by retention time.Concrete grammar is with reference to " optimizing research of technic acid parameter is produced in the hydrolysis of bundling wheat straw " (Lv Lili, 2013).
The acidification rate method of calculation of following examples 1-11 and comparative example 1 per dry matter stalk are as follows: first measure straw saccharification acidification liquid phase voltaile fatty acid (VFAs) content, again according to the equivalent transforming relationship of following table VFAs and COD, be converted into COD amount.
| Title | Acetic acid | Propionic acid | Isopropylformic acid | Butyric acid | Isovaleric acid | Valeric acid |
| COD equivalent coefficient | 1.07 | 1.51 | 1.82 | 1.82 | 2.04 | 2.04 |
Acidification rate=(the initial VFAs of final VFAs-) × COD equivalent coefficient/unit stalk amount of dry matter × 100% of per dry matter stalk.
Unit stalk amount of dry matter adopts the heavy method of difference (105 DEG C are dried 24h) to measure, and concrete grammar is with reference to " biogas conventional method of analysis ", and Chengdu Inst. of Biology, Chinese Academy of Sciences compiles, Beijing Science Press, 1984.
The acidification rate of per dry matter stalk can show straw saccharification acidification effect, and acidification rate is higher shows that treatment effect is better.
Embodiment 1
The present embodiment relates to a kind of efficient acidifying flora fermented liquid, and its preparation method is as follows:
Fetch the natural pond liquid in the chicken manure biogas engineering of Yanqing, with vibrosieve from obtaining solid phase and liquid phase, then solid phase is concentrated uses salt acid for adjusting pH to 5.5, places 3 days, obtains process solid phase; By composite additive (comprising CaO 100 weight part, cellulase 5 weight part), broomcorn straw and above-mentioned liquid phase according to part by weight be 1: 12: 120 mixing, places 5 days afterwards obtain straw saccharification liquid; Above-mentioned process solid phase is joined in straw saccharification liquid, initial ph value is regulated to be 7.5 carry out fermentation reaction, measure voltaile fatty acid (VFAs) content in fermented liquid, until when the content of voltaile fatty acid does not for three days on end raise, obtained efficient acidifying flora fermented liquid.For ease of transporting or depositing, by concentrated 5 times of efficient for gained acidifying flora fermented liquid vibratory screening apparatus.
Embodiment 2
The present embodiment relates to a kind of efficient acidifying flora fermented liquid, and its preparation method is as follows:
Fetch the natural pond liquid in the straw methane engineering of Yanqing, with vibrosieve from obtaining solid phase and liquid phase, then solid phase is concentrated uses salt acid for adjusting pH to 4, places 1 day, obtains process solid phase; By composite additive (containing CaO 50 weight part, cellulase 1 weight part), maize straw and above-mentioned liquid phase according to part by weight be 1:10:100 mixing, places 2 days afterwards obtain straw saccharification liquid; Above-mentioned process solid phase is joined in above-mentioned straw saccharification liquid, initial ph value is regulated to be 6.5 carry out fermentation reaction, measure voltaile fatty acid (VFAs) content in fermented liquid, until when not the raising containing numerical quantity of voltaile fatty acid for three days on end, obtained efficient acidifying flora fermented liquid.For ease of transporting or depositing, by concentrated 4 times of efficient for gained acidifying flora fermented liquid vibratory screening apparatus.
Embodiment 3
The present embodiment relates to a kind of efficient acidifying flora fermented liquid, and its preparation method is as follows:
Fetch the natural pond liquid in the straw methane engineering of Yanqing, with vibrosieve from obtaining solid phase and liquid phase, then solid phase is concentrated uses phosphorus acid for adjusting pH to 5, places 2 days, obtains process solid phase; By composite additive (containing CaO 40 weight part, cellulase 1 weight part), wheat stalk and above-mentioned liquid phase according to part by weight be 1:9:90 mixing, places 2 days afterwards obtain straw saccharification liquid; Above-mentioned process solid phase is joined in above-mentioned straw saccharification liquid, initial ph value is regulated to be 7 carry out fermentation reaction, measure voltaile fatty acid (VFAs) content in fermented liquid, until when the content of voltaile fatty acid does not raise, obtained efficient acidifying flora fermented liquid.For ease of transporting or depositing, by concentrated 4.5 times of efficient for gained acidifying flora fermented liquid vibratory screening apparatus.
Embodiment 4
The present embodiment relates to a kind of efficient acidifying flora fermented liquid, and its preparation method is as follows:
Fetch the natural pond liquid in the chicken manure biogas engineering of Yanqing, with vibrosieve from obtaining solid phase and liquid phase, then solid phase is concentrated uses nitre acid for adjusting pH to 4.5, places 2 days, obtains process solid phase; By composite additive (comprising CaO 150 weight part, cellulase 5 weight part), broomcorn straw and above-mentioned liquid phase according to part by weight be 1: 12: 120 mixing, places 5 days afterwards obtain straw saccharification liquid; Above-mentioned process solid phase is joined in above-mentioned straw saccharification liquid, initial ph value is regulated to be 7 carry out fermentation reaction, measure voltaile fatty acid (VFAs) content in fermented liquid, until when the content of voltaile fatty acid does not raise, obtained efficient acidifying flora fermented liquid.For ease of transporting or depositing, by concentrated 4 times of efficient for gained acidifying flora fermented liquid vibratory screening apparatus.
Embodiment 5
The present embodiment relates to a kind of efficient acidifying flora fermented liquid, and its preparation method is as follows:
Fetch the natural pond liquid in the straw methane engineering of Yanqing, with vibrosieve from obtaining solid phase and liquid phase, then solid phase is concentrated uses salt acid for adjusting pH to 5.5, places 3 days, obtains process solid phase; By composite additive (containing CaO 50 weight part, cellulase 1 weight part), rice straw and above-mentioned liquid phase according to part by weight be 1:10:100 mixing, places 2 days afterwards obtain straw saccharification liquid; Above-mentioned process solid phase is joined in above-mentioned straw saccharification liquid, initial ph value is regulated to be 6.5 carry out fermentation reaction, measure voltaile fatty acid (VFAs) content in fermented liquid, until when the content of voltaile fatty acid does not for three days on end raise, obtained efficient acidifying flora fermented liquid.In the process, suitably add above-mentioned from the liquid of natural pond isolated above-mentioned liquid phase, the salinity caused with the evaporation kept the skin wet raise.For ease of transporting or depositing, by concentrated 4 times of efficient for gained acidifying flora fermented liquid vibratory screening apparatus.
Embodiment 6
The present embodiment relates to a kind of straw saccharification acidation treatment method, comprises the following steps:
2.5 tons of broomcorn straws are loaded as solid phase on straw saccharification acidification reactor top, bottom adds containing composite additive (containing CaO 50 weight part, cellulase 1 weight part) 0.375 ton and 5 times of concentrated solutions 0.14 ton of efficient acidifying fermentative microflora fermented liquid of preparing by embodiment 1 method are as liquid phase (add water concentrated solution during use and convert to original content), in reactor, solid phase and liquid phase are kept apart by filter screen, liquid phase pump is sprayed solid phase, iterative cycles like this, by being located at the start and stop of the liquidometer control pump of solid phase and liquid phase respectively.
Stalk is put into reactor saccharification acidification after 20 days, the acidification rate of per dry matter stalk reaches 50%.The acidification rate daily variation measurement result of per dry matter stalk as shown in Figure 1.
Embodiment 7
The present embodiment relates to a kind of straw saccharification acidation treatment method, comprises the following steps:
8 tons of maize straws are loaded as solid phase on straw saccharification acidification reactor top, bottom adds containing composite additive (containing CaO 100 weight part, cellulase 1 weight part) 0.8 ton and 4 times of concentrated solutions 0.2 ton of efficient acidifying fermentative microflora fermented liquid of preparing by embodiment 2 method are as liquid phase (add water concentrated solution during use and convert to original content), in reactor, solid phase and liquid phase are kept apart by filter screen, liquid phase pump is sprayed solid phase, iterative cycles like this, by being located at the start and stop of the liquidometer control pump of solid phase and liquid phase respectively.
Stalk is put into reactor saccharification acidification after 20 days, the acidification rate of per dry matter stalk reaches 49%.The acidification rate daily variation measurement result of per dry matter stalk as shown in Figure 2.
Embodiment 8
The present embodiment relates to a kind of straw saccharification acidation treatment method, comprises the following steps:
2.5 tons of maize straws are loaded as solid phase on straw saccharification acidification reactor top, bottom adds containing composite additive (containing CaO 50 weight part, cellulase 1 weight part) 0.5 ton and 5 times of concentrated solutions 0.25 ton (added water by concentrated solution during use and convert to original content) of efficient acidifying fermentative microflora fermented liquid of preparing by embodiment 3 method are as liquid phase, in reactor, solid phase and liquid phase are kept apart by filter screen, liquid phase pump is sprayed solid phase, iterative cycles like this, by being located at the start and stop of the liquidometer control pump of solid phase and liquid phase respectively.
Stalk is put into reactor saccharification acidification after 20 days, the acidification rate of per dry matter stalk reaches 51%.The acidification rate daily variation measurement result of per dry matter stalk as shown in Figure 3.
Embodiment 9 one kinds of straw saccharification acidation treatment methods are identical with embodiment 6, difference isolates liquid phase after being to carry out saccharification acidification for the stalk first time newly added, add new same compound additive by same ratio again to continue to carry out saccharification acidification to stalk with identical efficient acidifying flora fermented liquid, circular treatment like this 5 times, the acidification rate of per dry matter stalk reaches 70%.
Embodiment 10 1 kinds of straw saccharification acidation treatment methods are identical with embodiment 7, difference isolates liquid phase after being to carry out saccharification acidification for the stalk first time newly added, add new same compound additive by same ratio again to continue to carry out saccharification acidification to stalk with identical efficient acidifying flora fermented liquid, circular treatment like this 3 times, the acidification rate of per dry matter stalk reaches 65%.
Embodiment 11 1 kinds of straw saccharification acidation treatment methods are identical with embodiment 8, difference isolates liquid phase after being to carry out saccharification acidification for the stalk first time newly added, add new same compound additive by same ratio again to continue to carry out saccharification acidification to stalk with identical efficient acidifying flora fermented liquid, circular treatment like this 5 times, the acidification rate of per dry matter stalk reaches 67%.
Comparative example 1
2.5 tons of maize straws are loaded as solid phase on straw saccharification acidification reactor top, bottom adds from the natural pond liquid in biogas engineering as liquid phase, and in reactor, solid phase and liquid phase are kept apart by filter screen, and liquid phase pump is sprayed solid phase, iterative cycles like this, by the start and stop of liquidometer control pump.
Stalk is put into reactor saccharification acidification after 31 days, the highest acidification rate of per dry matter stalk reaches 37%.But because remaining at a large amount of methanogens in the liquid of natural pond, the product after stalk acidifying is consumed by methanogen again.The acidification rate daily variation measurement result of per dry matter stalk as shown in Figure 4.
Although above the present invention is described in detail with a general description of the specific embodiments, on basis of the present invention, can make some modifications or improvements it, this will be apparent to those skilled in the art.Therefore, these modifications or improvements without departing from theon the basis of the spirit of the present invention, all belong to the scope of protection of present invention.
Claims (10)
1. an efficient acidifying flora fermented liquid, it is characterized in that, its preparation method comprises the following steps:
S1, get natural pond liquid, be separated and concentratedly obtain solid phase and liquid phase;
S2, by described solid phase acid for adjusting pH to 4-5.5, place 1-3 days, obtained process solid phase;
S3, by composite additive, stalk and described liquid phase according to part by weight 1-2: 8-12: 80-120 mix, places at least 2 days afterwards obtain straw saccharification liquid; Described composite additive comprises CaO 5-500 part and cellulase 0.1-10 part by weight;
S4, described process solid phase is joined in described straw saccharification liquid, regulate initial ph value to be that 6.5-7.5 reacts, until reacted when the content of voltaile fatty acid does not raise, obtain efficient acidifying flora fermented liquid.
2. efficient acidifying flora fermented liquid according to claim 1, is characterized in that, described composite additive by weight, comprises CaO 10-250 part and cellulase 0.5-5 part; Preferably include CaO 50 parts and cellulase 1 part.
3. the efficient acidifying flora fermented liquid according to any one of claim 1-2, is characterized in that, composite additive, stalk and described liquid phase described in step S3 are 1:10:100 mixing according to part by weight.
4. a straw saccharification acidation treatment method, is characterized in that, comprises and utilizes the efficient acidifying flora fermented liquid described in any one of claim 1-3 and described composite additive to carry out saccharification acidification to stalk.
5. straw saccharification acidation treatment method according to claim 4, is characterized in that, the part by weight of described composite additive, stalk and described efficient acidifying flora fermented liquid is 1-2: 8-12: 1-3; Preferred weight ratio is 1: 8-10: 1-2; Further preferred weight ratio is 1: 9-10: 1.5-2.
6. the straw saccharification acidation treatment method according to any one of claim 4-5, is characterized in that, process several times to stalk, until be disposed up hill and dale by stalk; When the content of voltaile fatty acid does not raise in the liquid of saccharification acidification each time, terminate this straw saccharification acidification.
7. straw saccharification acidation treatment method according to claim 6, is characterized in that, divides and processes stalk for 5-8 time.
8. the straw saccharification acidation treatment method according to any one of claim 4-7, it is characterized in that, stalk is comprised the steps: to put into reactor top as solid phase, described composite additive and described efficient acidifying flora fermented liquid are put into reactor lower part as liquid phase, in reactor, solid phase and liquid phase are kept apart by filter screen, and liquid phase pump is sprayed solid phase; Iterative cycles like this.
9. the straw saccharification acidation treatment method according to any one of claim 4-8, is characterized in that, the preparation stalk used of described efficient acidifying flora fermented liquid is identical with described straw saccharification acidation treatment method stalk used kind.
10. the straw saccharification acidation treatment method according to any one of claim 4-9, is characterized in that, described stalk is one or more in sorghum stalk, cornstalk, straw, rice straw.
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| CN105417851A (en) * | 2015-11-19 | 2016-03-23 | 威海汉邦生物环保科技有限公司 | Printing and dyeing wastewater treatment method and preparation method of compound biological flocculant |
| CN109536537A (en) * | 2018-12-13 | 2019-03-29 | 青岛合能环境技术有限公司 | A kind of industrialized producing technology for accelerating stalk hydrolysis acidification |
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