CN1788869A - Solid composite microbe microsphere for soil rehabilitation and its preparation method - Google Patents
Solid composite microbe microsphere for soil rehabilitation and its preparation method Download PDFInfo
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 26
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- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 13
- 239000000725 suspension Substances 0.000 claims abstract description 11
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- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The present invention provides one kind of soil repairing solid compound microbe microball and its preparation process. The soil repairing solid compound microbe microball is prepared with calcium alginate as embedding material and solid calcium carbonate as solid pore-creating agent to embed petroleum hydrocarbon degrading fungi, bacteria and nutritive matter, and the preparation process includes suspension preparation, microball formation, eliminating pore-creating agent and other steps. The present invention has the advantages of solid carrier maintained, has super large pores for reinforced mass transfer and embedded fungi, bacteria and nutritive matter, and thus possesses the advantages of high mass transferring speed, protection, nourishing, high activity and stability, etc. This kind of solid compound microbe microball may find its wide application in the biological repair of petroleum polluted soil.
Description
Technical field
The present invention relates to a kind of solid composite microbe microsphere for soil rehabilitation and preparation method thereof, belong to the microorganism formulation technology of preparing of oil-polluted soils biological restoration.
Background technology
The environmental organism recovery technique mainly is made up of the content of three aspects: (1) utilizes the technology (Natural Attenuation) of indigenous microorganism metabolic capability; (2) method of activation indigenous microorganism capacity of decomposition (Biostimulation is called for short the bioactivation method); (3) interpolation has the method (Bioaugmentation is called for short biological additive process) of decomposing the specified microorganisms (group) of difficult degradation compound ability at a high speed.Biological restoration process for oil-polluted soils, but form complexity, bio-refractory and have lower characteristics such as biology availability because petroleum pollution has, indigenous microorganism is difficult to effectively, the petroleum hydrocarbon in the soil of degrading fast, completely.Biological additive process can have the efficient of the microorganism formulation raising biological restoration of efficient degradation petroleum hydrocarbon ability by interpolation, effectively removes petroleum hydrocarbon contaminant.The commercially available microorganism formulation of developing on the U.S., Europe and other places at present, as BET BIOPETRO, MICRO-BLAZE, OPPENHEIMER FORMULA, STEP ONE etc. are mainly based on bacterium liquid and dry powder.This class preparation in use has the storage and transport of being unfavorable for, influenced by soil ecosystem and cause the activity inducement phase long, with the indigenous microorganism interaction process in shortcoming such as active easily forfeiture, thereby need use in a large number and repeatedly add, cause remediation efficiency to be significantly less than the laboratory research level, treatment cost can be in any more yet.Develop active height, the strong microorganism formulation of anti-environmental impact ability is the key that addresses this problem.
Cell fixation (immobilization) technology is to grow up from immobilised enzymes the seventies in 20th century.It is a kind of space field that free cell is positioned to limit with the means of chemistry or physics, and makes it keep active, the method for recycling.Immobilized cell technique helps improving that microbial cell concentration and purity, maintenance high-efficiency strain, microorganism in the bioreactor run off less, tenable environment impact strong, operational stability is good, be beneficial to and denitrogenate and remove high-enriched organics or some hard-degraded substance.Immobilized cell technique is easy to the attention that technology has caused people's height as an efficient low-consume, operational administrative.Immobilized cell technique has been obtained certain progress aspect environmental improvement.People such as Pometto in 1997 have announced that synthesized polymer materials such as utilizing polyethylene or polypropylene and vegetable material prepare the patent of microbial cell fixation support, and the carrier that obtains can be used for biofilm reactor and handles waste gas and waste water (US 5595893).But this carrier is the organic polymer synthetic vectors, and its biocompatibility and biodegradability are relatively poor, easily environment is produced secondary pollution after discarded.People such as Wang Xin, Li Peijun has reported the method that adopts polyvinyl alcohol and the embedding of boric acid complex carrier to move glue bacillus degraded soil China and Philippines, pyrene pollutant in " environmental science " the 23rd volume, the result shows, immobilized microorganism has overwhelming superiority to the degraded of pollutant in containing the natural soils of indigenous bacterium.On the other hand, in the cell fixation application process, because embedded material is especially inapplicable to macromolecule substrate to a certain degree hindering the diffusion of substrate and oxygen.Therefore, when utilizing the inner microorganism of material protection such as gel, also certainly will cause obstruction to the transmission of material, the relation between the two how resolved is the problem that institute must solution in the preparation high-performance bio preparation process.
Summary of the invention
At the deficiency that exists in the existing microorganism formulation technology of preparing, the object of the invention is to provide a kind of solid composite microbe microsphere for soil rehabilitation and preparation method thereof.This solid composite microbe microsphere has efficient mass transfer, protectiveness, auxotype, use conveniently, active and advantage such as stability is high, do not need repeatedly to add.The preparation method is embedded material with the calcium alginate, solid carbonic acid calcium is the solid pore-foaming agent, bacterium, fungi strain and the nutriment of embedding degradable petroleum hydrocarbon material, the preparation process through suspension preparation, microballoon moulding and removal pore-foaming agent obtains solid composite microbe microsphere.
The present invention can be realized by following proposal:
A kind of solid composite microbe microsphere for soil rehabilitation is characterized in that: described composite microbe microsphere is embedded material with the calcium alginate, and solid carbonic acid calcium is the solid pore-foaming agent, and embedding has the bacterium of petroleum hydrocarbon degradation ability and fungi strain, nutriment; This composite microbe microsphere is cellular, and inner honeycomb hole aperture is 10～100 μ m, and its microsphere diameter is 0.5～3mm.
The invention provides a kind of preparation method who prepares solid composite microbe microsphere for soil rehabilitation, it is characterized in that this method is embedded material with the calcium alginate, solid carbonic acid calcium is pore-foaming agent, bacterium, fungi strain and the nutriment of embedding degradable petroleum hydrocarbon material, its concrete steps are as follows:
1) cultivate on the plane: adopt micro-biological process to prepare potato plating medium (PDA) and LB culture medium, fungi and bacterium are inoculated into respectively in ready PDA and the LB culture dish, cultivated 2～5 days at 25 ℃～30 ℃, preserve standby;
2) shaking bottle cultivates: prepare PDA fluid nutrient medium and LB fluid nutrient medium by micro-biological process.Divide and install in the triangular flask that volume is 300～500ml, every bottle is cultivated base unit weight is 100～200ml, 121 ℃ of following high-temperature sterilizations 15 minutes, be cooled to room temperature, in aseptic workbench, distinguish inoculated fungi and bacterium then, the cultured thalline of plating medium is transferred to shaken in the bottle, to shake bottle and place the air shaking table, regulate shaking speed 130～170rpm, cultivated 1～5 day down for 25 ℃～30 ℃, collect behind the bacterium liquid fungal cultures and bacterial cultures in 1: 0.1～10 ratio mixing for standby use;
3) preparation sodium alginate-glucose-inorganic salt solution, wherein sodium alginate concentration is 0.5%～3%, concentration of glucose is 1%～4%, KH
2PO
4Concentration is 0.1%～0.2%, NH
4NO
3Concentration is 0.1%～0.2%, MgSO
4Concentration is 0.05%～0.15%;
4) at normal temperatures, 500～1000 order calcium carbonate microparticles are dispersed in the described solution of step 3), calcium carbonate concentration is 2～10%; Adding step 2 in solution) the liquid bacterium liquid that obtains in, bacterium liquid is 1～5: 5 with the liquor capacity ratio, stirs and makes finely dispersed suspension;
5) draw suspension with dropper, be added dropwise to concentration and be in 1%～3% the calcium chloride solution, drop contacts the back and forms the solid spherical solids precipitation with calcium chloride solution;
6) collect spheric granules, put into the glucose-inorganic salt solution that does not contain sodium alginate, glucose is formed and 3 with inorganic salts) identical.Slowly drip 0.1M HCl solution, wait not have tangible bubble and generate, collect the spheric granules of removing the calcium carbonate solia particle, promptly be prepared into solid composite microbe microsphere;
The fungi with petroleum hydrocarbon degradation ability of adopting is one or both in thorn little Ke Yinhan bacterium of spore or the Phanerochaete chrysosporium.
The bacterium with petroleum hydrocarbon degradation ability of adopting is one or more in pseudomonas, Nocardia, Rhod, Micrococcus, Mycobacterium, corynebacterium or the bacillus.
It is 1%～3% that described sodium alginate-glucose-inorganic salt solution composition can be optimized for sodium alginate concentration, and concentration of glucose is 1%～3%, KH
2PO
4Concentration is 0.1%～0.15%, NH
4NO
3Concentration is 0.1%～0.15%, MgSO
4Concentration is 0.05%～0.10%.Described solid carbonic acid calcium particle diameter can be optimized for 500～800 orders.Concentration can be optimized for 2%～8% in the described solid carbonic acid calcium.
Foregoing has been described solid composite microbe microsphere of the present invention and preparation method thereof.The super big hole solid composite microbe microsphere of the present invention's preparation is compared with existing microorganism formulation; its tangible advantage is; to prepare the organically combination of super big hole technology and immobilized cell technique, the advantage of the two will be integrated, and promptly have protectiveness high mass transfer performances is arranged again.Guaranteeing the cell density height, the microbial activity retention time is long, and when anti-environmental impact ability was strong, mass transfer had been strengthened in the existence of super big hole, helps rapid microbial growth; Add the required nutriment of bacterium conk in the embedding process, make preparation after rendering to the contaminated soil environment, can at first improve micro organism quantity and activity rapidly by breeding in the preparation, with the interaction of indigenous microorganism in occupy superiority; Super big hole solid microbe preparation instant effect in contaminated soil keeps long action time, has avoided repeatedly adding the cost that causes and has improved.In addition, formulation preparation process simple economy, employed embedded material are natural material, and with low cost, biocompatibility and biodegradability are good, have environment friendly.The present invention has broad application prospects in the biological restoration process of oil-polluted soils.
Description of drawings
Fig. 1 is the photo (calcium carbonate has removed, and multiplication factor is 40 times) of the super big hole solid microbe microballoon of the present invention's preparation under the light microscope.
The dehydrogenase activity of the calcium alginate microbe microsphere that Fig. 2 has described super big hole solid microbe microballoon of the present invention and pore not after cultivating through 48 hours under 25 ℃～30 ℃, the dehydrogenase activity of microorganism in the 1 corresponding super big hole solid microbe microballoon wherein, 2 correspondences be the dehydrogenase activity of microorganism in the calcium alginate microbe microsphere of pore not.
The specific embodiment
Fungi with petroleum hydrocarbon degradation ability of the present invention and bacterium can be by screening from the soil of oil pollution or obtaining from the mode that various countries DSMZ buys known petroleum hydrocarbon degradation bacterial strain.
Following example will give further instruction to method provided by the invention, but not limit the present invention.
1) cultivate on the plane: adopt thorn little Ke Yinhan bacterium of spore and pseudomonad fungi and the bacterium as embedding.Adopt micro-biological process to prepare potato plating medium (PDA) and LB culture medium, will sting the little Ke Yinhan bacterium of spore and be inoculated on the ready PDA plating medium, cultivated 4 days, preserve standby at 28 ℃; Pseudomonad is inoculated on the ready LB plating medium, cultivated 2 days, preserve standby at 30 ℃;
2) shaking bottle cultivates: prepare PDA fluid nutrient medium 100ml and LB fluid nutrient medium 100ml by micro-biological process, install to respectively in the triangular flask that volume is 300ml, 121 ℃ of following high-temperature sterilizations 15 minutes, be cooled to room temperature, inoculation thorn little Ke Yinhan bacterium of spore and pseudomonad respectively in aseptic workbench then, will shaking bottle, to place air shaking table, fungal culture condition be 28 ℃, 160rpm cultivated 4 days; The Bacteria Culture condition is 30 ℃, and 160rpm cultivated 1 day; Collect bacterium liquid, long-pending than being 10: 1 mixing for standby use with bacterium and fungi bacteria liquid.
3) preparation sodium alginate-glucose-inorganic salt solution, wherein sodium alginate concentration is 1%, concentration of glucose is 1%, KH
2PO
4Concentration is 0.1%, NH
4NO
3Concentration is 0.10%, MgSO
4Concentration is 0.05%.
4) at normal temperatures, 500 order calcium carbonate microparticles are dispersed in the described solution of step 3), calcium carbonate concentration is 8%; Adding step 2 in solution) mixed bacteria liquid that obtains in, bacterium liquid is 1: 5 with the liquor capacity ratio, fully stirs and makes finely dispersed suspension.
5) draw suspension with dropper, be added dropwise to concentration and be in 1% the calcium chloride solution, drop with form the solid spherical solids precipitation immediately after calcium chloride solution contacts.
6) collect spheric granules, put into the glucose-inorganic salt solution that does not contain sodium alginate, glucose is formed and 3 with inorganic salts) identical.Slowly drip 0.1M HCl solution, wait not have tangible bubble and generate, collect the spheric granules of removing the calcium carbonate solia particle, promptly make solid composite microbe microsphere (as shown in Figure 1).The composite microbe microsphere that obtains is cellular, and inner honeycomb hole aperture is 50～100 μ m, and its microsphere diameter is 1.5～3mm.
1) cultivate on the plane: adopt the little Ke Yinhan bacterium of thorn spore, Phanerochaete chrysosporium and red coccus fungi and the bacterium as embedding.Adopt micro-biological process to prepare potato plating medium (PDA) and LB culture medium, fungi is inoculated on the ready PDA plating medium, cultivated 5 days, preserve standby at 25 ℃; Microbionation to ready LB plating medium, was cultivated 2 days at 30 ℃, preserve standby.
2) shaking bottle cultivates: prepare PDA fluid nutrient medium 200ml and LB fluid nutrient medium 100ml by micro-biological process, install to respectively in the triangular flask that volume is 300ml, 121 ℃ of following high-temperature sterilizations 15 minutes, be cooled to room temperature, the little Ke Yinhan bacterium of inoculation thorn spore, Phanerochaete chrysosporium and red coccus respectively in aseptic workbench then, will shaking bottle, to place air shaking table, fungal culture condition be 25 ℃, 160rpm cultivated 5 days; The Bacteria Culture condition is 30 ℃, and 160rpm cultivated 1 day; Prepare suspension after collecting bacterium liquid.
3) preparation sodium alginate-glucose-inorganic salt solution, wherein sodium alginate concentration is 3.0%, concentration of glucose is 3%, KH
2PO
4Concentration is 0.15%, NH
4NO
3Concentration is 0.15%, MgSO
4Concentration is 0.10%.
4) at normal temperatures, 800 order calcium carbonate microparticles are dispersed in the described solution of step 3), calcium carbonate concentration is 2%; Add the little Ke Yinhan bacterium of thorn spore in solution: Phanerochaete chrysosporium: red coccus is 5: 5: 1 a mixing material bacterium liquid, and bacterium liquid is 1: 1 with the liquor capacity ratio, fully stirs and makes finely dispersed suspension.
5) draw suspension with dropper, be added dropwise to concentration and be in 3% the calcium chloride solution, drop with form the solid spherical solids precipitation immediately after calcium chloride solution contacts.
6) collect spheric granules, put into the glucose-inorganic salt solution that does not contain sodium alginate, glucose is formed and 3 with inorganic salts) identical.Slowly drip 0.1M HCl solution, wait not have tangible bubble and generate, collect the spheric granules of removing the calcium carbonate solia particle, promptly be prepared into solid composite microbe microsphere.The composite microbe microsphere that obtains is cellular, and inner honeycomb hole aperture is 50～100 μ m, and its microsphere diameter is 1.5～3mm.
7) described according to the first five step, do not add solid carbonic acid calcium particulate, be prepared into the solid composite microbe microsphere of atresia.
8) microbe microsphere that obtains in step 6) and the step 7) is placed 28 ℃ cultivate down after 48 hours, observe the conk situation.Get 6 preparations respectively and put into test tube, adding pH is 0.05M Tris-HCl cushioning liquid, each 2ml of 0.1mol/L glucose solution, 0.5% (w/w) TTC (triphenyltetrazolium chloride) of 8.5, places 30 ℃ to develop the color 12 hours down.Each test tube adds 1 concentrated sulfuric acid stopped reaction.Discard the solution phase, add 5ml acetone respectively, fully vibration.When treating that red precipitate that dehydrogenase catalysis TTC reaction generates is extracted into organic facies fully, measure the absorbance of organic facies under 485nm, the high more dehydrogenase activity high more (as shown in Figure 2) that shows microorganism of absorbance.As can be seen from Figure 4, through the super big hole solid composite microbe microsphere of pore, its microbial activity exceeds nearly 60 times of the solid composite microbe microsphere of not pore.
Claims (9)
1. solid composite microbe microsphere for soil rehabilitation, it is characterized in that: described composite microbe microsphere is embedded material with the calcium alginate, and solid carbonic acid calcium is the solid pore-foaming agent, embedding has the bacterium of petroleum hydrocarbon degradation ability and fungi strain, nutriment; This composite microbe microsphere is cellular, and inner honeycomb hole aperture is 10～100 μ m, and its microsphere diameter is 0.5～3mm.
2. according to the described solid composite microbe microsphere for soil rehabilitation of claim 1, it is characterized in that: described fungi with petroleum hydrocarbon degradation ability is one or both in thorn little Ke Yinhan bacterium of spore or the Phanerochaete chrysosporium.
3. according to claim 1 or 2 described solid composite microbe microsphere for soil rehabilitation, it is characterized in that: described bacterium with petroleum hydrocarbon degradation ability is one or more in pseudomonas, Nocardia, Rhod, Micrococcus, Mycobacterium, corynebacterium or the bacillus.
4. preparation method who prepares solid composite microbe microsphere for soil rehabilitation as claimed in claim 1, it is characterized in that this method is embedded material with the calcium alginate, solid carbonic acid calcium is pore-foaming agent, bacterium, fungi strain and the nutriment of embedding degradable petroleum hydrocarbon material, its concrete steps are as follows:
1) cultivate on the plane: adopt micro-biological process to prepare potato plating medium and LB culture medium, fungi and bacterium are inoculated into respectively in ready potato plating medium and the LB culture dish, cultivated 2～5 days at 25 ℃～30 ℃, preserve standby;
2) shaking bottle cultivates: prepare potato plating medium fluid nutrient medium and LB fluid nutrient medium by micro-biological process, moist heat sterilization, distinguish inoculated fungi and bacterium after being cooled to room temperature, at 130～170rpm, cultivated 1～5 day down for 25 ℃～30 ℃, collect behind the bacterium liquid fungal cultures and bacterial cultures in 1: 0.1～10 ratio mixing for standby use;
3) preparation sodium alginate-glucose-inorganic salt solution, wherein sodium alginate concentration is 0.5%～3%, concentration of glucose is 1%～4%, KH
2PO
4Concentration is 0.1%～0.2%, NH
4NO
3Concentration is 0.1%～0.2%, MgSO
4Concentration is 0.05%～0.15%;
4) 500～1000 order calcium carbonate microparticles are dispersed in the described solution of step 3), the solid carbonic acid calcium concentration is 2～10%; Adding step 2 in solution) the liquid bacterium liquid that obtains in, bacterium liquid is 1～5: 5 with the liquor capacity ratio, stirs and makes finely dispersed suspension;
5) draw suspension with dropper, be added dropwise to concentration and be in 1%～3% the calcium chloride solution, drop contacts the back and forms the solid spherical solids precipitation with calcium chloride solution;
6) collect spheric granules, put into the glucose-inorganic salt solution that does not contain sodium alginate, glucose form with inorganic salts and step 3) in solution identical; Slowly drip 0.1M HCl solution, wait not have tangible bubble and generate, collect the spheric granules of removing the calcium carbonate solia particle, promptly be prepared into solid composite microbe microsphere.
5. the preparation method of solid composite microbe microsphere for soil rehabilitation as claimed in claim 4 is characterized in that: described fungi with petroleum hydrocarbon degradation ability is in thorn little Ke Yinhan bacterium of spore or the Phanerochaete chrysosporium one or both.
6. the preparation method of solid composite microbe microsphere for soil rehabilitation as claimed in claim 4, it is characterized in that: described bacterium with petroleum hydrocarbon degradation ability is one or more in pseudomonas, Nocardia, Rhod, Micrococcus, Mycobacterium, corynebacterium or the bacillus.
7. the preparation method of solid composite microbe microsphere for soil rehabilitation as claimed in claim 4, it is characterized in that: it is 1%～3% that described sodium alginate-glucose-inorganic salt solution consists of sodium alginate concentration, concentration of glucose is 1%～3%, KH
2PO
4Concentration is 0.1%～0.15%, NH
4NO
3Concentration is 0.1%～0.15%, MgSO
4Concentration is 0.05%～0.10%.
8. the preparation method of solid composite microbe microsphere for soil rehabilitation as claimed in claim 1, it is characterized in that: described solid carbonic acid calcium particle diameter is 500～800 orders.
9. the preparation method of solid composite microbe microsphere for soil rehabilitation as claimed in claim 1, it is characterized in that: concentration is 2%～8% in the solid carbonic acid calcium described in the step 4).
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