CN106966673A - A kind of method of acceleration microbial mineralization alkali solid discarded object - Google Patents
A kind of method of acceleration microbial mineralization alkali solid discarded object Download PDFInfo
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- CN106966673A CN106966673A CN201710062691.1A CN201710062691A CN106966673A CN 106966673 A CN106966673 A CN 106966673A CN 201710062691 A CN201710062691 A CN 201710062691A CN 106966673 A CN106966673 A CN 106966673A
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- discarded object
- bacterium
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- alkali solid
- solid waste
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/08—Slag cements
- C04B28/082—Steelmaking slags; Converter slags
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/08—Acids or salts thereof
- C04B22/085—Acids or salts thereof containing nitrogen in the anion, e.g. nitrites
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
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- Chemical Kinetics & Catalysis (AREA)
- Tropical Medicine & Parasitology (AREA)
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- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Processing Of Solid Wastes (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
Abstract
The invention discloses a kind of method of acceleration microbial mineralization alkali solid discarded object, its step is：Carbonic anhydrase bacterium is seeded in corresponding culture medium and cultivated, it is 10 to prepare cell concentration6~107Individual/mL concentration bacterium solution；A certain amount of alkali solid discarded object is poured into agitated kettle, a certain amount of concentration bacterium solution and zinc salt are added into agitated kettle, continues to be stirred until homogeneous, slurry is poured into mould shaping of vibrating.After shaping, test specimen is placed in relative humidity (60% ± 3%), the environment of temperature (20 ± 2) DEG C and conserved, be stripped, sample after the demoulding is put into autoclave pressure, in relative humidity (70% ± 3%), CO after 1d24h is conserved under pressure.Analysis detection is carried out to alkali solid discarded object mineralization product, as a result show, accelerated using zinc salt after microbial mineralization, alkali solid discarded object calcium carbonate, carbon aluminic acid calcium content is obviously improved, the strength of materials and durability are relatively not used microbial process contrast groups and are obviously improved, the increase of material internal compactness extent.
Description
Technical field
The invention belongs to microbiological art and the interdisciplinary science technology of materials science field, it is related to a kind of acceleration microorganism
The microbial process of mineralising alkali solid discarded object.
Background technology
In recent years, with the fast development of national economy, the solid waste that industrial processes are produced increases year by year, such as
Fruit does not take reasonable manner to comprehensively utilize these solid waste, and many danger will be necessarily caused to social environment
Evil, such as land occupation pollutes air, waste of resource etc..Solid waste resource recovery utilizes most one of extensive, effective way just
It is to be used for construction material, the main active mineral composition of alkali solid discarded object is C2S、C3S、C4AF and RO phases (Mg, Fe, Mn etc.
The solid solution that is formed of oxide) etc., it is close with cement component, but prepare construction material using solid waste and also there is water
Change speed slow, the problems such as stability is poor.
Microbial mineralization inductive technology is to have imitated CO in nature2Mineral absorption process, i.e. CO2With containing alkalescence or
The ore reaction of alkaline earth oxide, generates permanent, more stable so a series of processes of carbonate.But in nature
In, mineral carbonation process is abiogenous, and process is very slow.In order to accelerate this process, extracted from nature
Certain microorganism accelerates its enzymeization to act on there is provided its abundant suitable existence, breeding and priming reaction condition, then artificial
Improve CO2Concentration, its secrete carbonic anhydrase can accelerate hydration reaction speed about 10 in theory7Times, it is obviously improved CO2's
Absorption efficiency and absorption rate, and its secretion also has certain gelling, so as to reach the efficient carbon sequestration of microorganism.Zinc
Ion is the necessary ion that microorganism generates carbonic anhydrase, and the addition of zinc ion can be obviously improved microorganism generation carbonic anhydrase
Metabolic rate, lifts microbial mineralization speed.
The technology one, using discarded object, the advanced technology economized on resources with the energy, is processing alkali solid discarded object
Effective ways, can not only solve the pollution of industrial production output solid waste, can also alleviate to a certain extent caused
Greenhouse effects have processing time short, and technique is simple, and small investment will not produce secondary pollution, with higher economy
With social benefit.
The content of the invention
Technical problem：The present invention provides a kind of method of acceleration microbial mineralization alkali solid discarded object, and the method has
Cost is low, effect is notable, environment-friendly, will not produce the advantage of secondary pollution.
Technical scheme：Method of the invention based on using zinc ion acceleration microbial mineralization alkali solid discarded object, including
Following steps：
Carbonic anhydrase bacterium is seeded in corresponding culture medium and cultivated by step 1., and it is 10 to prepare cell concentration6~107Individual/mL
Carbonic anhydrase bacterium concentration bacterium solution；
Step 2. pours into alkali solid discarded object in agitated kettle, and above-mentioned concentration bacterium solution, zinc salt are added into agitated kettle
With water, continue to be stirred until homogeneous, continue to be stirred into slurry after adding sand, the slurry is poured into mould shaping of vibrating；
After step 3. shaping, the test specimen of shaping is placed in relative humidity 60% ± 3%, the environment that 20 ± 2 DEG C of temperature and supported
Shield, is stripped after 1 day, sample after the demoulding is put into autoclave pressure, in relative humidity 70% ± 3%, CO2Pressure is 0.2-0.4Mpa
Lower maintenance 3-5 hours, obtains solid waste mineralising product strength up to more than 40Mpa.
The solid waste mineralising product, its neutral and alkali solid waste, sand, bacterium solution, water, zinc salt are the ﹕ of 1 ﹕ 2~3 in mass ratio
0.2~0.3：0.1~0.2：0.01~0.02 prepares.
Described zinc salt, can accelerate the metabolic rate of carbonic anhydrase bacterium, accelerate microbial mineralization process, lift mineralising product
Intensity and endurance quality.
Beneficial effect：The present invention compared with prior art, with advantages below：
1st, under pressure carbon dioxide curing condition, carbonic anhydrase bacterium absorbs, conversion CO2For carbonate, with alkaline solid waste
Ca in reaction system2+、Mg2+Plasma reaction, while the CaCO of microbial mineralization generation3In the system containing exciting agent,
The formation of hydrated calcium silicate and calcium aluminate of hydrated carbon can be promoted.Zinc ion is the necessary ion that microorganism generates carbonic anhydrase, zinc
The addition of ion can be obviously improved the metabolic rate that microorganism generates carbonic anhydrase, lift microbial mineralization speed, solid waste
The intensity of thing building material is to being obviously improved raising.
2nd, the microbial process that the present invention is used, with efficient, simplified curing condition, the features such as economic and environment-friendly, formation
Mineralogical property is stable, durability is strong, during the carbon dioxide that produces can effectively capture utilization, slow down greenhouse effects.
Brief description of the drawings
The half-tone information that Fig. 1 is obtained using x-ray tomography calculates microbial mineralization and carbon steel refuse lac gel material carbon
The amount contrast of sour calcium,
Fig. 2 microbial mineralizations and carbon steel refuse lac gel material pore structure comparison diagram,
Fig. 3 microbial mineralizations and carbon steel refuse lac gel material TG comparison diagrams,
Fig. 4 microbial mineralizations and carbon steel refuse lac gel material microscopic appearance comparison diagram.
Embodiment
Carbonic anhydrase bacterium of the present invention derives from Chinese industrial Culture Collection.
The method that the present invention accelerates mineralising alkali solid discarded object based on microorganism, method and step is as follows：
(1) carbonic anhydrase bacterium concentration bacterium solution is obtained：Carbonic anhydrase bacterium is inoculated in the culture medium solution after sterilizing, every liter of training
Foster base contains 3~7g of peptone, 6~7g of beef leaching thing 4~6g, NaCl, 16~18g of agar, MgSO40.3~0.7g, and
It is 7~8 to control pH, in shaken cultivation 24h at 32~38 DEG C, obtains the bacterium solution containing carbonic anhydrase bacterium, at 4 DEG C through 6000~
After 10~15min of 8000rpm high speed centrifugations, remove after the culture medium nutriment of upper strata plus deionized water, it is contained in concentration bacterium solution
Cell concentration is 106~107Individual/mL.
(2) a certain amount of solid waste is poured into agitated kettle, a certain amount of concentration bacterium solution, nitric acid is added into agitated kettle
Zinc and water, continue to be stirred until homogeneous, and continue to stir after adding sand, slurry is poured into mould into shaping of vibrating；
(3) after being molded, test specimen is placed in relative humidity (60% ± 3%), the environment of temperature (20 ± 2) DEG C and conserved, 1d
After be stripped, sample after the demoulding is put into autoclave pressure, in humidity (70% ± 3%), certain C O24h-6h is conserved under pressure.
(4) solid waste, sand, bacterium solution, water are the ﹕ 0.2~0.3 of 1 ﹕ 2~3 in mass ratio in the solid waste building material：
0.1~0.2 prepares.
(5) under certain pressure carbon dioxide curing condition, carbonic anhydrase bacterium absorbs, conversion CO2For carbonate, with alkalescence
Ca in solid waste reaction system2+、Mg2+Plasma reaction, while the CaCO of microbial mineralization generation3In the system containing exciting agent
In, the formation of hydrated calcium silicate and calcium aluminate of hydrated carbon can be promoted, the intensity of solid waste building material is to being obviously improved
Improve.Zinc ion is the necessary ion that microorganism generates carbonic anhydrase, and the addition of zinc ion can be obviously improved microorganism generation carbon
The metabolic rate of acid anhydrides enzyme, lifts microbial mineralization speed.The half-tone information obtained using x-ray tomography calculates zinc ion
Accelerate the amount contrast of microbial mineralization and microbial mineralization slag binder materials calcium carbonate it can be found that in reaction system, accompanying drawing
1st, 2,3,4 be respectively that the half-tone information obtained using x-ray tomography calculates zinc ion acceleration microbial mineralization and microorganism
The amount contrast of mineralising slag binder materials calcium carbonate, zinc ion accelerate microbial mineralization and microbial mineralization slag cement pores
Structure Comparison, zinc ion accelerate microbial mineralization and microbial mineralization slag binder materials TG contrasts, zinc ion to accelerate microorganism
Mineralising uses zinc ion acceleration micro- with microbial mineralization slag binder materials microscopic appearance comparison diagram it can be seen from result of the test
Alkali solid discarded object binder materials prepared by biomineralization technology, calcium carbonate content substantially increases, the closely knit journey inside product
Degree is significantly improved, and the intensity and durability for material are obviously improved.The method has that cost is low, effect significantly, environment
Close friend, will not produce the advantage of secondary pollution.
Example：
(1) carbonic anhydrase bacterium concentration bacterium solution is obtained：Carbonic anhydrase bacterium is inoculated in the culture medium solution after sterilizing, every liter
Culture medium contains peptone 7g, beef leaching thing 6g, NaCl 7g, agar 18g, MgSO40.7g, and control pH to be 7~8, in
Shaken cultivation 24h at 32 DEG C, obtains the bacterium solution containing carbonic anhydrase bacterium, through 6000~8000rpm high speed centrifugations at 4 DEG C
After 15min, remove after the culture medium nutriment of upper strata plus deionized water, contained cell concentration is 10 in concentration bacterium solution6~107Individual/
mL。
(2) 400g slags are poured into after being stirred in agitated kettle, into agitated kettle add 100ml concentration bacterium solution with
50ml water, 5g zinc nitrates, continue to be stirred until homogeneous, continue to stir after adding sand, slurry is poured into mould shaping of vibrating.
The zinc ion of table 1. accelerates microbial mineralization slag binder materials proportioning/g
| Slag | Sand | Water | Concentrate bacterium solution | Zinc nitrate |
| 400 | 1200 | 50 | 100 | 5 |
(3) after being molded, test specimen is placed in relative humidity (60% ± 3%), the environment of temperature (20 ± 2) DEG C and conserved, 1d
After be stripped, sample after the demoulding is put into autoclave pressure, in humidity (70% ± 3%), CO2Pressure is maintenance under the conditions of 0.3MPa
4h。
(4) the slag binder materials for accelerating microbial method to prepare using zinc ion has higher-strength, and what no accumulation of salt in the surface soil ftractureed shows
As occurring after microbial mineralization inducing action, the calcium carbonate content after carbonization inside brick body increases, and has aquation carbon in hydrated product
The production of calcium aluminate, the increase of brick interior solid degree.The method has that cost is low, effect is notable, environment-friendly, will not produce two
The advantage of secondary pollution.
Claims (3)
1. a kind of method of acceleration microbial mineralization alkali solid discarded object, it is characterised in that this method comprises the following steps：
Carbonic anhydrase bacterium is seeded in corresponding culture medium and cultivated by step 1., and it is 10 to prepare cell concentration6~107Individual/mL carbon
Acid anhydrides enzyme bacterium concentrates bacterium solution；
Step 2. pours into alkali solid discarded object in agitated kettle, added into agitated kettle above-mentioned concentration bacterium solution, zinc salt with
Water, continues to be stirred until homogeneous, and continues to be stirred into slurry after adding sand, the slurry is poured into mould into shaping of vibrating；
After step 3. shaping, the test specimen of shaping is placed in relative humidity 60% ± 3%, the environment that 20 ± 2 DEG C of temperature and conserved, 1 day
After be stripped, sample after the demoulding is put into autoclave pressure, in relative humidity 70% ± 3%, CO2Pressure be 0.2-0.4Mpa under conserve 3-
5 hours, solid waste mineralising product strength was obtained up to more than 40Mpa.
2. the method according to claim 1 that solid waste building material is prepared based on microbial mineralization inductive technology,
Characterized in that, the solid waste mineralising product, its neutral and alkali solid waste, sand, bacterium solution, water, zinc salt in mass ratio for 1 ﹕ 2 ~
3 ﹕ 0.2 ~ 0.3：0.1~0.2：0.01 ~ 0.02 prepares.
3. the method according to claim 1 that solid waste building material is prepared based on microbial mineralization inductive technology,
Characterized in that, described zinc salt, can accelerate the metabolic rate of carbonic anhydrase bacterium, accelerate microbial mineralization process, lift mineralising
The intensity and endurance quality of product.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109608079A (en) * | 2019-01-15 | 2019-04-12 | 武汉理工大学 | A kind of in-situ carburization method improving carbonization product structural behaviour |
| CN111943543A (en) * | 2020-07-21 | 2020-11-17 | 东南大学 | Method for preparing admixture by modifying steel slag powder through microbial technology |
| CN111978026A (en) * | 2020-09-04 | 2020-11-24 | 中国矿业大学(北京) | Mineralized and sealed CO2Mining microbial cementing filling material and preparation method thereof |
| CN116217112A (en) * | 2023-03-14 | 2023-06-06 | 中建安装集团南京建设有限公司 | Inorganic solid waste-microorganism composite curing agent and preparation method and application thereof |
| WO2023099925A1 (en) * | 2021-12-05 | 2023-06-08 | Biozeroc Ltd | Methods of producing mineral based material |
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| CN103664227A (en) * | 2013-12-16 | 2014-03-26 | 东南大学 | Cement-based material surface filming protective agent by using microorganism mineralization to capture CO2 and application method of protective agent |
| CN103725288A (en) * | 2013-12-16 | 2014-04-16 | 东南大学 | Reagent for consolidating soil by utilizing carbonic anhydrase microbes and using method thereof |
| CN105481469A (en) * | 2015-12-09 | 2016-04-13 | 东南大学 | Method used for preparing solid waste building material products based on microorganism mineralization induction technology |
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| CN102121033A (en) * | 2010-02-10 | 2011-07-13 | 华中科技大学 | Method for preparing calcium carbonate by using catalysis of microbial carbonic anhydrase |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109608079A (en) * | 2019-01-15 | 2019-04-12 | 武汉理工大学 | A kind of in-situ carburization method improving carbonization product structural behaviour |
| CN111943543A (en) * | 2020-07-21 | 2020-11-17 | 东南大学 | Method for preparing admixture by modifying steel slag powder through microbial technology |
| CN111978026A (en) * | 2020-09-04 | 2020-11-24 | 中国矿业大学(北京) | Mineralized and sealed CO2Mining microbial cementing filling material and preparation method thereof |
| CN111978026B (en) * | 2020-09-04 | 2021-08-27 | 中国矿业大学(北京) | Mineralized and sealed CO2Mining microbial cementing filling material and preparation method thereof |
| WO2023099925A1 (en) * | 2021-12-05 | 2023-06-08 | Biozeroc Ltd | Methods of producing mineral based material |
| CN116217112A (en) * | 2023-03-14 | 2023-06-06 | 中建安装集团南京建设有限公司 | Inorganic solid waste-microorganism composite curing agent and preparation method and application thereof |
| CN116217112B (en) * | 2023-03-14 | 2024-03-12 | 中建安装集团南京建设有限公司 | Inorganic solid waste-microorganism composite curing agent and preparation method and application thereof |
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Application publication date: 20170721 |