CN105080508A - Preparation method for absorbent made from lignin-degrading bacteria modified straw - Google Patents
Preparation method for absorbent made from lignin-degrading bacteria modified straw Download PDFInfo
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Abstract
The invention discloses a preparation method for an absorbent made from lignin-degrading bacteria modified straw, and belongs to the field of absorbent production. The preparation method comprises the following steps: dewaxing rape straw at first, and then adding a nutrient and a suspension without hyphae for sealed fermentation to obtain lignin-degrading bacteria modified straw; mixing the lignin-degrading bacteria modified straw with epoxy chloropropane for a cross-linking reaction, and then adding a trimethylamine alcoholic solution to obtain the absorbent eventually. The preparation method has the advantages that phanerochaete chrysosporium is utilized for degrading lignin in the rape straw to obtain cellulose and hemicellulose; the adsorption effect and the adsorption capacity of the prepared absorbent are high; moreover, the rape straw is utilized as a raw material for extracting natural cellulose; the preparation process is simple; the production cost is low.
Description
Technical field
The invention discloses a kind of preparation method of lignin-degrading bacteria modified straw adsorbent, belong to adsorbent and manufacture field.
Background technology
Agricultural solid residue mainly comprises agricultural crop straw etc., and they are mainly made up of ligno-cellulosic materials, and wherein three large constituents are cellulose, hemicellulose, lignin respectively.For maize straw, content of cellulose is the highest, and account for 45% of total amount, hemicellulose takes second place, and is about 35%, and lignin is then about 15%, but these constituent contents can because of growth region, crop species and different.Lignin is the natural polymer that on the earth, content second is abundant, is only second to cellulose.Lignin accounts for 20% ~ 30% of dry weight of wood, and visible lignin institute's role in the ecosphere is very important.Lignin belongs to the secondary metabolites of plant, have nothing to do with the transmission of the metabolism of energy, hereditary message, but in the supporting tissue of plant and the Transportation Organization of part, the filling of lignin but has indispensable function for the secondary growth of cell, also the invasion of pathogen to external world can reach the effect resisted.
Phanerochaete chrysosporium is a kind of whiterot fungi belonging to Basidiomycotina, a kind of filamentous fungi, illustrates as mushroom sample growth characteristics and has extensively flourishing netted mycelia.Its mycelia can to penetrate in lignocellulosic material and lignin degrading (component the most obstinate in lignocellulosic material), its objective is and obtain cellulose and hemicellulose, thus spot white after leaving delignification, this phenomenon is called that white is rotted.Phanerochaete chrysosporium is as medelling biological study, because its fast growth and fast degradation lignin ability.The lignin-degrading enzymes of fungus secretion has lignin peroxidase, manganese peroxidase, catalase and glyoxal oxidase.These oxidase catalyses Biodegradation of Lignins and variously comprise some inferior grade coals and some are containing the Some Persistent Organic Pollutants of lignin substrate.Mycelia is also used to the wood chip of degrading containing gold, thus discharges gold compound.
Summary of the invention
The technical problem that the present invention mainly solves: for the complex structure of current lignin, for main contact together three-dimensional net structure with phenyl-propane units, it and cellulose bundle closely, the problem of cellulosic adsorption capacity can be affected like this, provide a kind of preparation method of lignin-degrading bacteria modified straw adsorbent, rape stalk is first carried out dewaxing treatment by the present invention, add nutriment and the suspension that removes mycelia afterwards to carry out sealing and fermenting and obtain lignin-degrading bacteria modified straw, by modified straw and epoxychloropropane mixing cross-linking reaction, add final a kind of lignin-degrading bacteria modified straw adsorbent of trimethylamine alcoholic solution mixing again, the present invention utilizes Phanerochaete chrysosporium to be degraded by the lignin in stalk, obtain cellulose and hemicellulose, advantages of good adsorption effect, adsorption capacity is large, and be that raw material extracts natural cellulose with rape stalk, preparation technology is simple, production cost is low.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A preparation method for lignin-degrading bacteria modified straw adsorbent, is characterized in that concrete preparation process is:
(1) Phanerochaete chrysosporium is inoculated on malt agar slant medium, put into incubator to cultivate 5 ~ 7 days at 35 ~ 45 DEG C, white spore afterwards on scraping slant medium puts into the distilled water after 200 ~ 300mL sterilizing, obtained spore suspension, afterwards spore suspension is crossed sterilizing mineral wool and remove mycelia in suspension, be placed in refrigerating plant and preserve at 4 ~ 6 DEG C, for subsequent use;
(2) get rape stalk, put into airslide disintegrating mill and pulverize, cross 35 ~ 40 mesh standard sieves afterwards, obtain rape stalk pellet, then stalk pellet is put into baking oven, at 70 ~ 80 DEG C, dry 45 ~ 60min;
(3) getting 200 ~ 300mL pours in 500mL beaker for 1:1 by toluene and absolute ethyl alcohol mixed liquor by volume, getting the above-mentioned dried stalk pellet of 30 ~ 50g is added in the mixed liquor of toluene and absolute ethyl alcohol, shaking table vibration immersion 25 ~ 35min, use vacuum desiccator dry afterwards, dewaxing treatment is carried out to stalk material;
(4) rape stalk after dewaxing is put into sealing and fermenting tank, add 800 ~ 1000mL distilled water, 20 ~ 25g dipotassium hydrogen phosphate, 5 ~ 7g magnesium sulfate and 1 ~ 3g calcium chloride, 10 ~ 15g glucose is added again as nutriment after stirring with glass bar, continue to pour the above-mentioned obtained suspension removing mycelia into fermentation tank, sealing tank mouth with film is placed in constant incubator, 35 ~ 45 DEG C of bottom fermentations 2 ~ 3 weeks, and stir weekly a bed material;
(5) fermentate is removed filtration and obtain filter residue, with deionized water rinsing 3 ~ 5 times, put into thermostatic drying chamber dry 20 ~ 30min at 60 ~ 70 DEG C afterwards and obtain lignin-degrading bacteria modified straw;
(6) be 1:10 ~ 1:15 by modified straw and epoxychloropropane mixing by solid-to-liquid ratio, move into water-bath and be warming up to 60 ~ 70 DEG C, dry with vacuum desiccator after cross-linking reaction 3 ~ 6h, again by solid-to-liquid ratio to be 1:10 ~ 1:20 by the solid product after crosslinked and mass concentration be 30% the mixing of trimethylamine alcoholic solution, warming-in-water to 80 ~ 90 DEG C, filter residue is filtered to obtain after reaction 2 ~ 3h, with deionized water rinsing 3 ~ 5 times, put into thermostatic drying chamber dry 20 ~ 30min at 60 ~ 70 DEG C afterwards, obtain a kind of lignin-degrading bacteria modified straw adsorbent.
Described Phanerochaete chrysosporium is preserved in Chinese industrial Culture Collection (CICC), and bacterium numbering is 40719.
Described malt agar slant medium is made up of 10g malt flour, 2g dipotassium hydrogen phosphate, 1g magnesium sulfate, 20g agar, 2g peptone, 10g glucose, 1mg vitamin B12,1g asparagine and 1000mL distilled water.
Application process of the present invention: modified straw adsorbent the present invention obtained is applied in the treatment of waste water, to Cd in waste water
2+carry out adsorption treatment, in the wastewater disposal basin of 8m × 8m, first measure its initial Cd
2+concentration is 110 ~ 120mg/L, and adsorbent adds with 5 ~ 7g/L, after process 5 ~ 6h, measures Cd in the waste water after process
2+concentration is 5 ~ 8mg/L, Cd
2+clearance is 93 ~ 95%.
The invention has the beneficial effects as follows:
(1) the present invention utilizes Phanerochaete chrysosporium to be degraded by the lignin in stalk, obtains cellulose and hemicellulose, improves the adsorption effect of adsorbent;
(2) adsorbent of the present invention is that raw material extracts natural cellulose with rape stalk, and preparation technology is simple, and production cost is low.
Detailed description of the invention
First Phanerochaete chrysosporium is inoculated on malt agar slant medium, put into incubator to cultivate 5 ~ 7 days at 35 ~ 45 DEG C, white spore afterwards on scraping slant medium puts into the distilled water after 200 ~ 300mL sterilizing, obtained spore suspension, afterwards spore suspension is crossed sterilizing mineral wool and remove mycelia in suspension, be placed in refrigerating plant and preserve at 4 ~ 6 DEG C, for subsequent use; Get rape stalk, put into airslide disintegrating mill and pulverize, cross 35 ~ 40 mesh standard sieves afterwards, obtain rape stalk pellet, then stalk pellet is put into baking oven, at 70 ~ 80 DEG C, dry 45 ~ 60min; Getting 200 ~ 300mL pours in 500mL beaker for 1:1 by toluene and absolute ethyl alcohol mixed liquor by volume, getting the above-mentioned dried stalk pellet of 30 ~ 50g is added in the mixed liquor of toluene and absolute ethyl alcohol, shaking table vibration immersion 25 ~ 35min, use vacuum desiccator dry afterwards, dewaxing treatment is carried out to stalk material; Rape stalk after dewaxing is put into sealing and fermenting tank, add 800 ~ 1000mL distilled water, 20 ~ 25g dipotassium hydrogen phosphate, 5 ~ 7g magnesium sulfate and 1 ~ 3g calcium chloride, 10 ~ 15g glucose is added again as nutriment after stirring with glass bar, continue to pour the above-mentioned obtained suspension removing mycelia into fermentation tank, sealing tank mouth with film is placed in constant incubator, 35 ~ 45 DEG C of bottom fermentations 2 ~ 3 weeks, and stir weekly a bed material; Fermentate is removed filtration and obtains filter residue, with deionized water rinsing 3 ~ 5 times, put into thermostatic drying chamber dry 20 ~ 30min at 60 ~ 70 DEG C afterwards and obtain lignin-degrading bacteria modified straw; Be 1:10 ~ 1:15 by modified straw and epoxychloropropane mixing by solid-to-liquid ratio, move into water-bath and be warming up to 60 ~ 70 DEG C, dry with vacuum desiccator after cross-linking reaction 3 ~ 6h, again by solid-to-liquid ratio to be 1:10 ~ 1:20 by the solid product after crosslinked and mass concentration be 30% the mixing of trimethylamine alcoholic solution, warming-in-water to 80 ~ 90 DEG C, filter residue is filtered to obtain after reaction 2 ~ 3h, with deionized water rinsing 3 ~ 5 times, put into thermostatic drying chamber dry 20 ~ 30min at 60 ~ 70 DEG C afterwards, obtain a kind of lignin-degrading bacteria modified straw adsorbent.
Described Phanerochaete chrysosporium is preserved in Chinese industrial Culture Collection (CICC), and bacterium numbering is 40719.
Described malt agar slant medium is made up of 10g malt flour, 2g dipotassium hydrogen phosphate, 1g magnesium sulfate, 20g agar, 2g peptone, 10g glucose, 1mg vitamin B12,1g asparagine and 1000mL distilled water.
Example 1
First Phanerochaete chrysosporium is inoculated on malt agar slant medium, put into incubator to cultivate 5 days at 35 DEG C, white spore afterwards on scraping slant medium puts into the distilled water after 200mL sterilizing, obtained spore suspension, afterwards spore suspension is crossed sterilizing mineral wool and remove mycelia in suspension, be placed in refrigerating plant and preserve at 4 DEG C, for subsequent use; Get rape stalk, put into airslide disintegrating mill and pulverize, cross 35 mesh standard sieves afterwards, obtain rape stalk pellet, then stalk pellet is put into baking oven, at 70 DEG C, dry 45min; Getting 200mL pours in 500mL beaker for 1:1 by toluene and absolute ethyl alcohol mixed liquor by volume, getting the above-mentioned dried stalk pellet of 30g is added in the mixed liquor of toluene and absolute ethyl alcohol, 25min is soaked in shaking table vibration, uses vacuum desiccator dry afterwards, carries out dewaxing treatment to stalk material; Rape stalk after dewaxing is put into sealing and fermenting tank, add 800mL distilled water, 20g dipotassium hydrogen phosphate, 5g magnesium sulfate and 1g calcium chloride, 10g glucose is added again as nutriment after stirring with glass bar, continue to pour the above-mentioned obtained suspension removing mycelia into fermentation tank, sealing tank mouth with film is placed in constant incubator, 35 DEG C of bottom fermentations 2 weeks, and stir weekly a bed material; Fermentate is removed filtration and obtains filter residue, with deionized water rinsing 3 times, put into thermostatic drying chamber dry 20min at 60 DEG C afterwards and obtain lignin-degrading bacteria modified straw; Be 1:10 by modified straw and epoxychloropropane mixing by solid-to-liquid ratio, move into water-bath and be warming up to 60 DEG C, dry with vacuum desiccator after cross-linking reaction 3h, again by solid-to-liquid ratio to be 1:10 by the solid product after crosslinked and mass concentration be 30% the mixing of trimethylamine alcoholic solution, warming-in-water to 80 DEG C, filters to obtain filter residue after reaction 2h, with deionized water rinsing 3 times, put into thermostatic drying chamber dry 20min at 60 DEG C afterwards, obtain a kind of lignin-degrading bacteria modified straw adsorbent.
Described Phanerochaete chrysosporium is preserved in Chinese industrial Culture Collection (CICC), and bacterium numbering is 40719.
Described malt agar slant medium is made up of 10g malt flour, 2g dipotassium hydrogen phosphate, 1g magnesium sulfate, 20g agar, 2g peptone, 10g glucose, 1mg vitamin B12,1g asparagine and 1000mL distilled water.
Application process of the present invention: modified straw adsorbent the present invention obtained is applied in the treatment of waste water, to Cd in waste water
2+carry out adsorption treatment, in the wastewater disposal basin of 8m × 8m, first measure its initial Cd
2+concentration is 110mg/L, and adsorbent adds with 5g/L, after process 5h, measures Cd in the waste water after process
2+concentration is 5mg/L, Cd
2+clearance is 95%.
Example 2
First Phanerochaete chrysosporium is inoculated on malt agar slant medium, put into incubator to cultivate 6 days at 40 DEG C, white spore afterwards on scraping slant medium puts into the distilled water after 250mL sterilizing, obtained spore suspension, afterwards spore suspension is crossed sterilizing mineral wool and remove mycelia in suspension, be placed in refrigerating plant and preserve at 5 DEG C, for subsequent use; Get rape stalk, put into airslide disintegrating mill and pulverize, cross 38 mesh standard sieves afterwards, obtain rape stalk pellet, then stalk pellet is put into baking oven, at 75 DEG C, dry 53min; For 1:1, toluene and absolute ethyl alcohol are poured in 500mL beaker by volume, getting the above-mentioned dried stalk pellet of 40g is added in the mixed liquor of toluene and absolute ethyl alcohol, 30min is soaked in shaking table vibration, uses vacuum desiccator dry afterwards, carries out dewaxing treatment to stalk material; Rape stalk after dewaxing is put into sealing and fermenting tank, add 900mL distilled water, 23g dipotassium hydrogen phosphate, 6g magnesium sulfate and 2g calcium chloride, 13g glucose is added again as nutriment after stirring with glass bar, continue to pour the above-mentioned obtained suspension removing mycelia into fermentation tank, sealing tank mouth with film is placed in constant incubator, 40 DEG C of bottom fermentations 2.5 weeks, and stir weekly a bed material; Fermentate is removed filtration and obtains filter residue, with deionized water rinsing 4 times, put into thermostatic drying chamber dry 25min at 65 DEG C afterwards and obtain lignin-degrading bacteria modified straw; Be 1:3 by modified straw and epoxychloropropane mixing by solid-to-liquid ratio, move into water-bath and be warming up to 65 DEG C, dry with vacuum desiccator after cross-linking reaction 4.5h, again by solid-to-liquid ratio to be 1:15 by the solid product after crosslinked and mass concentration be 30% the mixing of trimethylamine alcoholic solution, warming-in-water to 85 DEG C, filters to obtain filter residue after reaction 2.5h, with deionized water rinsing 4 times, put into thermostatic drying chamber dry 25min at 65 DEG C afterwards, obtain a kind of lignin-degrading bacteria modified straw adsorbent.
Described Phanerochaete chrysosporium is preserved in Chinese industrial Culture Collection (CICC), and bacterium numbering is 40719.
Described malt agar slant medium is made up of 10g malt flour, 2g dipotassium hydrogen phosphate, 1g magnesium sulfate, 20g agar, 2g peptone, 10g glucose, 1mg vitamin B12,1g asparagine and 1000mL distilled water.
Application process of the present invention: modified straw adsorbent the present invention obtained is applied in the treatment of waste water, to Cd in waste water
2+carry out adsorption treatment, in the wastewater disposal basin of 8m × 8m, first measure its initial Cd
2+concentration is 115mg/L, and adsorbent adds with 6g/L, after process 5.5h, measures Cd in the waste water after process
2+concentration is 7mg/L, Cd
2+clearance is 94%.
Example 3
First Phanerochaete chrysosporium is inoculated on malt agar slant medium, put into incubator to cultivate 7 days at 45 DEG C, white spore afterwards on scraping slant medium puts into the distilled water after 300mL sterilizing, obtained spore suspension, afterwards spore suspension is crossed sterilizing mineral wool and remove mycelia in suspension, be placed in refrigerating plant and preserve at 6 DEG C, for subsequent use; Get rape stalk, put into airslide disintegrating mill and pulverize, cross 40 mesh standard sieves afterwards, obtain rape stalk pellet, then stalk pellet is put into baking oven, at 80 DEG C, dry 60min; For 1:1, toluene and absolute ethyl alcohol are poured in 500mL beaker by volume, getting the above-mentioned dried stalk pellet of 50g is added in the mixed liquor of toluene and absolute ethyl alcohol, 35min is soaked in shaking table vibration, uses vacuum desiccator dry afterwards, carries out dewaxing treatment to stalk material; Rape stalk after dewaxing is put into sealing and fermenting tank, add 1000mL distilled water, 25g dipotassium hydrogen phosphate, 7g magnesium sulfate and 3g calcium chloride, 15g glucose is added again as nutriment after stirring with glass bar, continue to pour the above-mentioned obtained suspension removing mycelia into fermentation tank, sealing tank mouth with film is placed in constant incubator, 45 DEG C of bottom fermentations 3 weeks, and stir weekly a bed material; Fermentate is removed filtration and obtains filter residue, with deionized water rinsing 5 times, put into thermostatic drying chamber dry 30min at 70 DEG C afterwards and obtain lignin-degrading bacteria modified straw; Be 1:15 by modified straw and epoxychloropropane mixing by solid-to-liquid ratio, move into water-bath and be warming up to 70 DEG C, dry with vacuum desiccator after cross-linking reaction 6h, again by solid-to-liquid ratio to be 1:20 by the solid product after crosslinked and mass concentration be 30% the mixing of trimethylamine alcoholic solution, warming-in-water to 90 DEG C, filters to obtain filter residue after reaction 3h, with deionized water rinsing 5 times, put into thermostatic drying chamber dry 30min at 70 DEG C afterwards, obtain a kind of lignin-degrading bacteria modified straw adsorbent.
Described Phanerochaete chrysosporium is preserved in Chinese industrial Culture Collection (CICC), and bacterium numbering is 40719.
Described malt agar slant medium is made up of 10g malt flour, 2g dipotassium hydrogen phosphate, 1g magnesium sulfate, 20g agar, 2g peptone, 10g glucose, 1mg vitamin B12,1g asparagine and 1000mL distilled water.
Application process of the present invention: modified straw adsorbent the present invention obtained is applied in the treatment of waste water, to Cd in waste water
2+carry out adsorption treatment, in the wastewater disposal basin of 8m × 8m, first measure its initial Cd
2+concentration is 120mg/L, and adsorbent adds with 7g/L, after process 6h, measures Cd in the waste water after process
2+concentration is 5 ~ 8mg/L, Cd
2+clearance is 93%.
Claims (3)
1. a preparation method for lignin-degrading bacteria modified straw adsorbent, is characterized in that concrete preparation process is:
(1) Phanerochaete chrysosporium is inoculated on malt agar slant medium, put into incubator to cultivate 5 ~ 7 days at 35 ~ 45 DEG C, white spore afterwards on scraping slant medium puts into the distilled water after 200 ~ 300mL sterilizing, obtained spore suspension, afterwards spore suspension is crossed sterilizing mineral wool and remove mycelia in suspension, be placed in refrigerating plant and preserve at 4 ~ 6 DEG C, for subsequent use;
(2) get rape stalk, put into airslide disintegrating mill and pulverize, cross 35 ~ 40 mesh standard sieves afterwards, obtain rape stalk pellet, then stalk pellet is put into baking oven, at 70 ~ 80 DEG C, dry 45 ~ 60min;
(3) getting 200 ~ 300mL pours in 500mL beaker for 1:1 by toluene and absolute ethyl alcohol mixed liquor by volume, getting the above-mentioned dried stalk pellet of 30 ~ 50g is added in the mixed liquor of toluene and absolute ethyl alcohol, shaking table vibration immersion 25 ~ 35min, use vacuum desiccator dry afterwards, dewaxing treatment is carried out to stalk material;
(4) rape stalk after dewaxing is put into sealing and fermenting tank, add 800 ~ 1000mL distilled water, 20 ~ 25g dipotassium hydrogen phosphate, 5 ~ 7g magnesium sulfate and 1 ~ 3g calcium chloride, 10 ~ 15g glucose is added again as nutriment after stirring with glass bar, continue to pour the above-mentioned obtained suspension removing mycelia into fermentation tank, sealing tank mouth with film is placed in constant incubator, 35 ~ 45 DEG C of bottom fermentations 2 ~ 3 weeks, and stir weekly a bed material;
(5) fermentate is removed filtration and obtain filter residue, with deionized water rinsing 3 ~ 5 times, put into thermostatic drying chamber dry 20 ~ 30min at 60 ~ 70 DEG C afterwards and obtain lignin-degrading bacteria modified straw;
(6) be 1:10 ~ 1:15 by modified straw and epoxychloropropane mixing by solid-to-liquid ratio, move into water-bath and be warming up to 60 ~ 70 DEG C, dry with vacuum desiccator after cross-linking reaction 3 ~ 6h, again by solid-to-liquid ratio to be 1:10 ~ 1:20 by the solid product after crosslinked and mass concentration be 30% the mixing of trimethylamine alcoholic solution, warming-in-water to 80 ~ 90 DEG C, filter residue is filtered to obtain after reaction 2 ~ 3h, with deionized water rinsing 3 ~ 5 times, put into thermostatic drying chamber dry 20 ~ 30min at 60 ~ 70 DEG C afterwards, obtain a kind of lignin-degrading bacteria modified straw adsorbent.
2. the preparation method of a kind of lignin-degrading bacteria modified straw adsorbent according to claim 1, it is characterized in that: described Phanerochaete chrysosporium is preserved in Chinese industrial Culture Collection (CICC), bacterium numbering is 40719.
3. the preparation method of a kind of lignin-degrading bacteria modified straw adsorbent according to claim 1, is characterized in that: described malt agar slant medium is made up of 10g malt flour, 2g dipotassium hydrogen phosphate, 1g magnesium sulfate, 20g agar, 2g peptone, 10g glucose, 1mg vitamin B12,1g asparagine and 1000mL distilled water.
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| CN112593437A (en) * | 2020-12-23 | 2021-04-02 | 合肥工业大学 | Biodegradation method of lignin |
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