CN105506024A - Pretreatment method for biomass waste - Google Patents
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- CN105506024A CN105506024A CN201410503116.7A CN201410503116A CN105506024A CN 105506024 A CN105506024 A CN 105506024A CN 201410503116 A CN201410503116 A CN 201410503116A CN 105506024 A CN105506024 A CN 105506024A
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Abstract
The invention especially relates to a pretreatment method for biomass waste, which belongs to the field of industrial biotechnology. According to the method, water, divalent iron ions and a hydrogen dioxide solution are successively added into crushed biomass waste, the above-mentioned materials are uniformly mixed under stirring, and treatment is carried out for at least 5 min, so a pretreatment fluid of the biomass waste is obtained; the molar weight of the divalent iron ions to be added into each g of the biomass waste is 2.63 to 52.6 mM; and the molar weight of hydrogen peroxide to be added into each g of the biomass waste is 3.5 to 7.1 mM. The pretreatment method for the biomass waste is simple in process, mild in conditions, friendly to the environment and energy-saving; and the pretreatment method is a novel pretreatment mode corresponding to a biomass waste structure with cassava vinasse as a representative and provides a novel approach for low-cost and high-efficiency conversion of biomass waste with cassava vinasse as a representative.
Description
Technical field
The present invention relates to industrial biotechnology field, particularly a kind of pretreatment process of biomass waste.
Background technology
Cassava has wider distribution, relatively cheap, waits Peak output, starch content advantages of higher, is used to the production of bio-ethanol.And cassava grain stillage take cassava as the solid waste produced in raw material production ethanol process.Cassava grain stillage is used as animal feed by some enterprises, the fuel of boiler, also have some enterprises directly by cassava grain stillage as the rubbish abandoned.Every year, produce from Chinese Cassava fuel ethanol production process more than 3,600,000 tons of vinasse.So a large amount of solid residue can cause serious environmental pollution.The main component of cassava grain stillage is lignocellulose, content of cellulose about about 20%, and the content of xylogen can up to 24%.The existence of a large amount of xylogen becomes the serious barrier of restriction cassava grain stillage utilization.In order to remove xylogen, continue to use soda acid conventional pretreatment for the pretreatment mode of cassava grain stillage now, the reaction of conventional pretreatment mode ubiquity is too strong, the carbohydrate rate of recovery is low, by product is many, many drawbacks such as energy consumption is large, equipment requirements is high, thus the large-scale comprehensive refining constraining that cassava grain stillage is the biomass waste of representative.So urgently invent a kind of mild condition, environmental friendliness, energy conservation and the New Pre processing mode adapted with the biomass waste structure that cassava grain stillage is representative, for realizing biomass waste low cost that cassava grain stillage is representative, Efficient Conversion provides a new approach.
Summary of the invention
The object of the invention is the pretreatment process providing a kind of biomass waste.The reaction conditions of the pretreatment process of biomass waste of the present invention is gentle, and achieve biomass waste low cost and high efficiency conversion processing, improve the yield of cellulosic transformation efficiency and production glucose, production cost is low, is more conducive to realize suitability for industrialized production.
For achieving the above object, the technical solution used in the present invention is:
A pretreatment process for biomass waste, is characterized in that, adds water successively, ferrous ion and superoxol in the biomass waste after pulverization process, stirs, processes at least 5min, obtain the pretreatment fluid of biomass waste;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 2.63-52.6mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 3.5-7.1mM.
Preferably, biomass waste described in every 1g need add the amount of substance of described ferrous ion is 11.9 ~ 15.8mM.
Preferably, biomass waste described in every 1g need add the amount of substance of superoxol is 5.3 ~ 7.1mM.
Ferrous ion and hydrogen peroxide react in the solution, produce a lot of free radical instantaneously, the structure of free radical bombardment biomass waste, make biomass crystallizing field and hydrogen bond network structure deteriorate, biomass waste is loosely organized, be conducive to the later stage its fully mix with enzyme, improve reaction efficiency and cellulosic transformation efficiency.This reaction also can be carried out at normal temperatures smoothly, without the need to heat-processed, but, if carry out the motion that suitable heating can accelerate free radical, strengthen free radical pre-treatment degree, therefore, present invention applicant has also done further test to Heating temperature, obtains proper Heating temperature.
Preferably, further comprising the steps of:
Carry out heat treated after biomass waste after pulverization process, water, ferrous ion and superoxol being mixed, the temperature of heat treated is 80-120 DEG C, and heat-up time is 5-60min.
Preferably, carry out heat treated after the biomass waste after pulverization process, water, ferrous ion and superoxol being mixed, the temperature of heat treated is 95 ~ 105 DEG C, and heat-up time is 20-40min.
Preferably, carry out heat treated after the biomass waste after pulverization process, water, ferrous ion and superoxol being mixed, the temperature of heat treated is 100 DEG C, and heat-up time is 30min.
Preferably, described ferrous ion derives from a kind of iron salt hydrolysis in ferrous sulfate or iron protochloride.
Preferably, biomass waste is dried and pulverization process, cross 40-100 object standard sieve.
The invention has the beneficial effects as follows:
Ferrous ion and hydrogen peroxide react in the solution, produce a lot of free radical instantaneously, free radical attacks the structure of biomass waste, make biomass crystallizing field and hydrogen bond network structure deteriorate, biomass waste is loosely organized, be conducive to the later stage its fully mix with enzyme, improve reaction efficiency and cellulosic transformation efficiency.
Also can carry out smoothly, without the need to heat-processed at normal temperatures in this reaction;
If carry out the motion that suitable heating can accelerate free radical, strengthen free radical pre-treatment degree, therefore, present invention applicant has also done further test to Heating temperature, obtains proper Heating temperature.
The pretreatment process technique of inventing described biomass waste is simple, mild condition, environmental friendliness, energy conservation and the New Pre processing mode adapted with the biomass waste structure that cassava grain stillage is representative, for realizing biomass waste low cost that cassava grain stillage is representative, Efficient Conversion provides a new approach.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, can implement according to this with reference to specification sheets word to make those skilled in the art.
Embodiment 1
A pretreatment process for biomass waste, comprises the following steps:
Step one, biomass waste to be dried and pulverization process, cross 40-100 object standard sieve;
Step 2, add water successively in the biomass waste after pulverization process, ferrous ion and superoxol, stir, process 60min, obtains the pretreatment fluid of biomass waste;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 2.63-52.6mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 3.5-7.1mM.
Embodiment 2
A pretreatment process for biomass waste, comprises the following steps:
Step one, biomass waste to be dried and pulverization process, cross 40-100 object standard sieve;
Step 2, add water successively in the biomass waste after pulverization process, ferrous ion and superoxol, stir;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 2.63mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 3.5mM;
Step 3, by after pulverization process biomass waste, water, ferrous ion and superoxol mixing after carry out heat treated, the temperature of heat treated is 80 DEG C, and heat-up time is 5min, obtain pretreatment fluid.
Wherein, ferrous ion derives from a kind of iron salt hydrolysis in ferrous sulfate or iron protochloride.
Embodiment 3
A pretreatment process for biomass waste, comprises the following steps:
Step one, biomass waste to be dried and pulverization process, cross 40-100 object standard sieve;
Step 2, add water successively in the biomass waste after pulverization process, ferrous ion and superoxol, stir;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 11.9mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 5.3mM;
Step 3, by after pulverization process biomass waste, water, ferrous ion and superoxol mixing after carry out heat treated, the temperature of heat treated is 95 DEG C, and heat-up time is 20min, obtain pretreatment fluid.
Wherein, ferrous ion derives from a kind of iron salt hydrolysis in ferrous sulfate or iron protochloride.
Embodiment 4
A pretreatment process for biomass waste, comprises the following steps:
Step one, biomass waste to be dried and pulverization process, cross 40-100 object standard sieve;
Step 2, add water successively in the biomass waste after pulverization process, ferrous ion and superoxol, stir;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 15.8mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 7.1mM;
Step 3, by after pulverization process biomass waste, water, ferrous ion and superoxol mixing after carry out heat treated, the temperature of heat treated is 100 DEG C, and heat-up time is 30min, obtain pretreatment fluid.
Wherein, ferrous ion derives from a kind of iron salt hydrolysis in ferrous sulfate or iron protochloride.
Embodiment 5
A pretreatment process for biomass waste, comprises the following steps:
Step one, biomass waste to be dried and pulverization process, cross 40-100 object standard sieve;
Step 2, add water successively in the biomass waste after pulverization process, ferrous ion and superoxol, stir;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 30mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 5.3mM;
Step 3, by after pulverization process biomass waste, water, ferrous ion and superoxol mixing after carry out heat treated, the temperature of heat treated is 105 DEG C, and heat-up time is 40min, obtain pretreatment fluid.
Wherein, ferrous ion derives from a kind of iron salt hydrolysis in ferrous sulfate or iron protochloride.
Embodiment 6
A pretreatment process for biomass waste, comprises the following steps:
Step one, biomass waste to be dried and pulverization process, cross 40-100 object standard sieve;
Step 2, add water successively in the biomass waste after pulverization process, ferrous ion and superoxol, stir;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 52.6mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 7.1mM;
Step 3, by after pulverization process biomass waste, water, ferrous ion and superoxol mixing after carry out heat treated, the temperature of heat treated is 120 DEG C, and heat-up time is 60min, obtain pretreatment fluid.
Wherein, ferrous ion derives from a kind of iron salt hydrolysis in ferrous sulfate or iron protochloride.
Simulate Industrial processes in the lab below in conjunction with the inventive method, it is carried out to the detection of effect, detected result is in table 1:
Embodiment 7.
Step one: biomass waste (as cassava grain stillage) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as cassava grain stillage) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as cassava grain stillage) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as cassava grain stillage) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as cassava grain stillage) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: to described biomass waste (as cassava grain stillage)) add copperas solution and superoxol in soak solution successively and constantly carry out convention stir, the mixed treating liquid of obtained biomass waste (as cassava grain stillage), wherein, the addition of described ferrous sulfate is 15.8mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 7.1mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture, in 80 DEG C, is incubated 30 minutes.After having reacted, be cooled to room temperature, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 10FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Embodiment 8.
Step one: biomass waste (as cassava grain stillage) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as cassava grain stillage) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as cassava grain stillage) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as cassava grain stillage) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as cassava grain stillage) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: to described biomass waste (as cassava grain stillage)) add copperas solution and superoxol in soak solution successively and constantly carry out convention stir, the mixed treating liquid of obtained biomass waste (as cassava grain stillage), wherein, the addition of described ferrous sulfate is 15.8mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 7.1mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture reacts 30 minutes under room temperature.After having reacted, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 10FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Embodiment 9:
Step one: biomass waste (as cassava grain stillage) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as cassava grain stillage) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as cassava grain stillage) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as cassava grain stillage) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as cassava grain stillage) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: to described biomass waste (as cassava grain stillage)) add copperas solution and superoxol in soak solution successively and constantly carry out convention stir, the mixed treating liquid of obtained biomass waste (as cassava grain stillage), wherein, the addition of described ferrous sulfate is 15.8mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 7.1mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture, in 100 DEG C, is incubated 45 minutes.After having reacted, be cooled to room temperature, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 10FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Embodiment 10
Step one: biomass waste (as cassava grain stillage) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as cassava grain stillage) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as cassava grain stillage) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as cassava grain stillage) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as cassava grain stillage) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: to described biomass waste (as cassava grain stillage)) add copperas solution and superoxol in soak solution successively and constantly carry out convention stir, the mixed treating liquid of obtained biomass waste (as cassava grain stillage), wherein, the addition of described ferrous sulfate is 11.9mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 5.3mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture, in 100 DEG C, is incubated 30 minutes.After having reacted, be cooled to room temperature, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 10FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Embodiment 11
Step one: biomass waste (as cassava grain stillage) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as cassava grain stillage) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as cassava grain stillage) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as cassava grain stillage) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as cassava grain stillage) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: to described biomass waste (as cassava grain stillage)) add copperas solution and superoxol in soak solution successively and constantly carry out convention stir, the mixed treating liquid of obtained biomass waste (as cassava grain stillage), wherein, the addition of described ferrous sulfate is 7.9mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 3.5mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture, in 100 DEG C, is incubated 15 minutes.After having reacted, be cooled to room temperature, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 10FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Embodiment 12
Step one: biomass waste (as cassava grain stillage) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as cassava grain stillage) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as cassava grain stillage) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as cassava grain stillage) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as cassava grain stillage) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: to described biomass waste (as cassava grain stillage)) add copperas solution and superoxol in soak solution successively and constantly carry out convention stir, the mixed treating liquid of obtained biomass waste (as cassava grain stillage), wherein, the addition of described ferrous sulfate is 11.9mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 5.3mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture, in 120 DEG C, is incubated 45 minutes.After having reacted, be cooled to room temperature, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 10FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Embodiment 13
Step one: biomass waste (as cassava grain stillage) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as cassava grain stillage) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as cassava grain stillage) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as cassava grain stillage) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as cassava grain stillage) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: to described biomass waste (as cassava grain stillage)) add copperas solution and superoxol in soak solution successively and constantly carry out convention stir, the mixed treating liquid of obtained biomass waste (as cassava grain stillage), wherein, the addition of described ferrous sulfate is 11.9mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 7.1mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture, in 100 DEG C, is incubated 15 minutes.After having reacted, be cooled to room temperature, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 10FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Embodiment 14
Step one: biomass waste (as maize straw) is dried to constant weight, pulverize with pulverizer afterwards, described biomass waste (as maize straw) after pulverizing is sieved, 80 object standard sieves are used to carry out process of sieving the described biomass waste (as maize straw) after pulverizing, for subsequent use;
Step 2: add the described biomass waste (as maize straw) after sieving and acetic acid ~ sodium-acetate buffer in container respectively, the mass body volume concentrations of biomass waste (as maize straw) described in biomass waste (as cassava grain stillage) soak solution in described container is made to be 80g/L, for subsequent use;
Step 3: add copperas solution and superoxol successively and constantly carry out convention stir in described biomass waste (as maize straw) soak solution, the mixed treating liquid of obtained biomass waste (as maize straw), wherein, the addition of described ferrous sulfate is 11.9mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is the concentration 7.1mM making hydrogen peroxide in described mixed treating liquid.
Step 4: above-mentioned mixture, in 100 DEG C, is incubated 30 minutes.After having reacted, be cooled to room temperature, add commercial fibres element enzyme (T.reesei26921), cellulase enzyme dosage is 20FPU/g substrate, and cellulase saccharification experiment, at 50 DEG C, reacts 72h.
Table 1
| Embodiment | The yield of glucose | Cellulosic transformation efficiency in algae |
| Unit | G/g substrate | ％ |
| The embodiment of the present invention 7 | 0.147 | 66.8％ |
| The embodiment of the present invention 8 | 0.129 | 58.9％ |
| The embodiment of the present invention 9 | 0.1988 | 90.4％ |
| The embodiment of the present invention 10 | 0.215 | 97.8％ |
| The embodiment of the present invention 11 | 0.1614 | 73.4％ |
| The embodiment of the present invention 12 | 0.1582 | 71.9％ |
| The embodiment of the present invention 13 | 0.1452 | 65.9％ |
| The embodiment of the present invention 14 | 0.46 | 90.2％ |
Can draw according to data in table 1:
Embodiment 9 and embodiment 10 effectiveness comparison good, it is optimum condition, both the optimum condition of pretreatment process of the present invention was mainly: the addition of described ferrous sulfate is 11.9 ~ 15.8mM for making ferrous sulfate substance withdrawl syndrome in described mixed treating liquid, and the addition of described superoxol is 5.3 ~ 7.1mM for making concentration of hydrogen peroxide in described mixed treating liquid.
And pretreatment process reaction conditions of the present invention is gentle, energy-conserving and environment-protective, need lower concentration chemical reagent, cost is low, not high to equipment requirements, can be applied to the waste recycling of biomass class.
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and shown here embodiment.
Claims (8)
1. a pretreatment process for biomass waste, is characterized in that, adds water successively, ferrous ion and superoxol in the biomass waste after pulverization process, stirs, processes at least 5min, obtain the pretreatment fluid of biomass waste;
Wherein, the amount of substance of the described ferrous ion that biomass waste described in every 1g need add is 2.63-52.6mM, and the amount of substance of the described hydrogen peroxide that biomass waste described in every 1g need add is 3.5-7.1mM.
2. the pretreatment process of biomass waste as claimed in claim 1, it is characterized in that, the amount of substance that biomass waste described in every 1g need add described ferrous ion is 11.9 ~ 15.8mM.
3. the pretreatment process of biomass waste as claimed in claim 2, it is characterized in that, the amount of substance that biomass waste described in every 1g need add superoxol is 5.3 ~ 7.1mM.
4. the pretreatment process of biomass waste as claimed in claim 1, is characterized in that, further comprising the steps of:
Carry out heat treated after biomass waste after pulverization process, water, ferrous ion and superoxol being mixed, the temperature of heat treated is 80-120 DEG C, and heat-up time is 5-60min.
5. the pretreatment process of biomass waste as claimed in claim 4, it is characterized in that, carry out heat treated after biomass waste after pulverization process, water, ferrous ion and superoxol being mixed, the temperature of heat treated is 95 ~ 105 DEG C, and heat-up time is 20-40min.
6. the pretreatment process of biomass waste as claimed in claim 5, it is characterized in that, carry out heat treated after biomass waste after pulverization process, water, ferrous ion and superoxol being mixed, the temperature of heat treated is 100 DEG C, and heat-up time is 30min.
7. the pretreatment process of the biomass waste according to any one of claim 3 or 6, is characterized in that, described ferrous ion derives from a kind of iron salt hydrolysis in ferrous sulfate or iron protochloride.
8. the pretreatment process of biomass waste as claimed in claim 7, is characterized in that, is dried and pulverization process by biomass waste, crosses 40-100 object standard sieve.
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