CN105906454A - Method for reducing efficiency of heavy metals in compost - Google Patents
Method for reducing efficiency of heavy metals in compost Download PDFInfo
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- CN105906454A CN105906454A CN201610190491.XA CN201610190491A CN105906454A CN 105906454 A CN105906454 A CN 105906454A CN 201610190491 A CN201610190491 A CN 201610190491A CN 105906454 A CN105906454 A CN 105906454A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/80—Soil conditioners
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
- C05D5/00—Fertilisers containing magnesium
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- General Chemical & Material Sciences (AREA)
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Abstract
The invention discloses a method for reducing efficiency of heavy metals in compost. According to the invention, chicken manure is used as a compost raw material, and wood chip or rice bran is added into the raw material to adjust a C/N ratio of the raw material to 25-30: 1 and a pH value to 6.5-7.5 and to control moisture content to be 50 to 60%; then a heavy metal passivator accounting for 1 to 5% of the wet weight of the raw material is added into the raw material and uniform mixing is carried out under stirring; and a groove type aerobic composting fermentation manner is used for composting fermentation. The method is simple and practicable, employs the specific heavy metal passivator for composting fermentation, can substantially reduce efficiency of heavy metals in compost and is capable of shortening composting time, improving dehydration rate and reducing nitrogen loss.
Description
Technical field
The present invention relates to a kind of compost method, reduce the method for heavy metal validity in compost particularly to a kind of.
Background technology
A large amount of uses of feed addictive in the development of modern large-scale cultivation industry, make farm animal excrement support with tradition dispersion
The feces of livestock and poultry grown has had bigger change at the aspect such as composition, character, because of high sodium and heavy metal in cultivation source organic fertilizer
Harmful substance remains, and may pollute farmland.In view of the composition transfer of organic fertilizer, the feces of livestock and poultry resource that China is current
Changing to utilize and lack scientific and reasonable technical specification, the security of fertilizer using in farmland needs to be improved further.
In livestock and poultry cultivation source organic fertilizer material, heavy metal pollution problem has caused highest attention.According to statistics, China uses every year
Trace mineral supplement be about 15～180,000 tons, do not discharged with fowl and animal excrement by animal use for about about 100,000 tons.
The investigation to China North China 8 provinces and cities fertilizer in recent years according to Liu Rongle etc., the content of beary metal in current portions organic waste with
Eighties of last century is compared the beginning of the nineties, and part content of beary metal increases, and in chicken manure and pig manure, Zn, Cu, Cr, Cd, As, Hg increase relatively
Many, in cow dung, Zn, Cu, As, Hg content increases, and sheep excrement then changes not quite.In livestock excrement composting, Zn, Cu, Cr add 2～4
Times.According to our latest survey, in the pig manure of indivedual Animal Raising Zones, content of beary metal problem is the most prominent, and Zn content is up to
2300mg/kg, lead content is up to 400mg/kg.Many experts think, China's heavy metal pollution is just dirty to soil by air, water body
Dye transfer, heavy metal pollution of soil has been enter into one " concentrating the multiple phase ", gradually healthy to resident and agricultural product security structure
Become serious threat.
Administering the main path of feces of livestock and poultry heavy metal pollution, one is by changing heavy metal existing forms in feces of livestock and poultry
Make it fix, reduce its mobility and utilizability；Two is to remove removing heavy metals from ight soil.Control both at home and abroad in feces of livestock and poultry
The main method of heavy metal pollution be use livestock excrement composting, will compost material Artificial Control at certain moisture, C/N ratio
With under ventilation condition by fermentable effect, organic matter is converted into the process of fertilizer.There are some researches show at Composting
The mud of reason, because of the diluting effect of conditioner, heavy metal about reduces 7.3%-16%, and makes the form of heavy metal have bigger change
Change.At present, Composting Process adds heavy metal deactivator so that it is heavy metal is relatively low to activity from the form that activity is higher
Forms Transformation, is increasingly subject to people's attention.
Livestock excrement composting heavy metal passivating technique has physical technique, chemical technology and microbial technique.The most several
The operability of heavy metals removal method, high efficiency, property with low cost and environmental safety, find that physical method is removing mud
During middle heavy metal, removal efficiency is not as good as chemistry and microbial process, but cost is relatively low, simple to operate；And make chemically and
When microorganism leaching method reduces content of beary metal, although the clearance of heavy metal is higher, but because of costly, troublesome poeration, and
Waste liquid after process easily causes secondary pollution to environment, the most still fails to reach the practical stage.
Utilize physical method that heavy metal in Composting Process carries out adsorption treatment, adsorbent wide material sources, Method And Principle
Fairly simple, easy and simple to handle, but the removal efficiency of heavy metal is the highest, and adsorbent is difficult to separate with compost, remains on
In composting production.So, screening and isolation technics to high-efficiency adsorbent still need to study further and perfect.In view of above-mentioned former
Cause, organic fertilizer use science, safety research the most necessary and urgent, be also relation can realize agricultural optimum
The key link of circulation and technological difficulties.The passivating technique research of heavy metal in fertilizer can be reduced the danger of heavy-metal residual
Evil risk, blocks the heavy metal transfer to food chain, to ensureing that agricultural product quality and safety even people's health has safely very
Important realistic meaning.
Summary of the invention
It is an object of the invention to provide and a kind of reduce the method for heavy metal validity in compost, simple, utilize spy
Fixed heavy metal deactivator carries out compost fermentation, can significantly reduce heavy metal validity in compost, and can shorten the compost time, carry
Dehydration rate, reduces nitrogen loss.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of reduce the method for heavy metal validity in compost, with chicken manure as composting material, add in raw material wood chip or
Rice bran regulation raw material C/N ratio for 25-30:1, regulates raw material pH6.5-7.5, and moisture controls as 50-60%, then in raw material
Addition accounts for the heavy metal deactivator of raw material weight in wet base 1-5% and is uniformly mixed, and uses slot type aerobic composting fermentation mode compost to send out
Ferment.Compost fermentation turning in every 2 days 1 time.
The present invention is by utilizing specific heavy metal deactivator to carry out compost fermentation, and can significantly reduce heavy metal in compost has
Effect property, additionally, add this heavy metal deactivator can accelerate compost startup, can shorten about 6 days compost time, put forward dehydration rate
10.3%, reduce nitrogen loss 24.2%.Main cause is the porosity that heavy metal deactivator can improve compost material, promotes sky
Air-flow is logical, and to be more beneficial for moisture loss relevant, the most faster improves heap temperature, shortening fermentation time.Heavy metal deactivator itself
Suction-operated can reduce the ammonia volatilization of megathermal period, can reduce nitrogen loss in composting process the most to a certain extent.As
Preferably, described heavy metal deactivator is mixed by the component of following percentage by weight meter: brown alga charcoal 30-50%, concavo-convex
Rod soil 40-60%, sepiolite surplus.The present invention is directed to the feature of chicken manure, develop for the heavy metal being suitable for during Chicken Manure Compost
Passivator, with brown alga charcoal, attapulgite as primary raw material, collaborative performance effect when coordinating sea bubble, in particular by specific
Brown alga charcoal, heavy metal element Cu, Zn, Pb and As in chicken manure are had good passivation effect.Additionally, the group of the present invention
Point raw material is natural, environmental friendliness, itself is nontoxic, without separating after adding in compost, is good soil improvement after entering soil
Agent, can improve the fertilizer conservation effect of soil.
As preferably, described brown alga charcoal carbonizes after being mixed by following raw material components according to mass percent and makes:
Sargassum fusifome 40-60%, Sargassum horneri 30-50%, sargassum thunbergii surplus.Inventor finds through long felt Journal of Sex Research, uses Phaeophyta
Several specific marine alga proportioning after make charcoal, find that it has efficient heavy metal for Chicken Manure Compost and is passivated effect,
And production cost is relatively low, environmental friendliness.Sargassum fusifome charcoal, coordinates Sargassum horneri charcoal, sargassum thunbergii charcoal synergy, more preferably
More efficient performance heavy metal is passivated effect.Inventor speculates, the charcoal that these three raw material is made can have a preferable huge sum of money
Belong to passivation effect may with itself material composition, structure relevant with the particularity of character, especially they possess special knot
Structure air bag is relevant.
As preferably, described charing method particularly includes: after raw material components is mixed, in oxygen-free environment, 600-650 DEG C
Lower cracking 3-5 hour, naturally cooling.
As preferably, described brown alga charcoal is to use after peracid modification, and the method for described acid modification is:
Brown alga charcoal is placed in acid solution, stir process 30-60min, clean with distilled water flushing after taking-up, dry, pulverize.This
Invention is by carrying out above-mentioned acid treatment to brown alga charcoal, it is possible to significantly improve and the heavy metal in Chicken Manure Compost is passivated effect.
As preferably, the rotating speed of described stir process is that 500-800 turns/min.
As preferably, described acid solution be the nitric acid of mass concentration 10-15% with the phosphoric acid of mass concentration 20-30% according to
The volume ratio of 1:1-3 mixes.
As preferably, described attapulgite uses after modification, and the method for described modification is: will be the most concavo-convex
Rod soil joins in silane coupler-ethanol solution that mass concentration is 3-6%, under logical condition of nitrogen gas, adds at 50-60 DEG C
Hot 2-4 hour, absolute methanol washed 3-5 time, was vacuum dried 3-5h at 60-70 DEG C.The present invention by attapulgite is carried out on
State modification, it is possible to significantly improve and the heavy metal in Chicken Manure Compost is passivated effect.
As preferably, described silane coupler is the one in KH550, KH560, KH792.
As preferably, also added organic matter decomposing inoculant in raw material, the consumption of organic matter decomposing inoculant is raw material weight in wet base
0.1-0.3% by add organic matter decomposing inoculant, fermentation time can be shortened.General without organic matter decomposing inoculant
Fermentation time, at 40-50 days, adds the fermentation time after organic matter decomposing inoculant at about 30 days.
The invention has the beneficial effects as follows: simple, utilize the specific heavy metal deactivator of the present invention to carry out compost fermentation,
Heavy metal validity in compost can be significantly reduced, and the compost time can be shortened, put forward dehydration rate, reduce nitrogen loss.
Detailed description of the invention
Below by specific embodiment, technical scheme is described in further detail.
In the present invention, if not refering in particular to, the raw material used and equipment etc. are all commercially available or commonly used in the art.
Method in following embodiment, if no special instructions, is the conventional method of this area.
Attapulgite is commercially available, and granular size is at 80-120 mesh.Sepiolite is commercially available, and granular size is at 100-150 mesh.Sheep dwells
Dish, Sargassum horneri, sargassum thunbergii are commercially available dry product.
Embodiment 1:
A kind of reduce the method for heavy metal validity in compost, with chicken manure as composting material, in raw material, add wood chip adjust
Joint raw material C/N ratio for 25:1, regulates raw material pH 6.5, and it is 50% that moisture controls, then adds in raw material and account for raw material weight in wet base
The heavy metal deactivator of 1% is uniformly mixed, and (existing conventional compostation is sent out to use slot type aerobic composting fermentation mode compost fermentation
Ferment mode), fermentation time was at about 34-44 days.
Heavy metal deactivator is mixed by the component of following percentage by weight meter: brown alga charcoal 30%, attapulgite
60%, sepiolite 10%.
Described brown alga charcoal carbonizes after being mixed by following raw material components according to mass percent and makes: sargassum fusifome
40%, Sargassum horneri 50%, sargassum thunbergii 10%.Charing method particularly includes: after raw material components is mixed, in oxygen-free environment, 600 DEG C
Lower cracking 5 hours, naturally cooling.
Embodiment 2:
A kind of reduce the method for heavy metal validity in compost, with chicken manure as composting material, in raw material, add rice bran adjust
Joint raw material C/N ratio for 30:1, regulates raw material pH 7.5, and it is 60% that moisture controls, then adds in raw material and account for raw material weight in wet base
The heavy metal deactivator of 5% and account for the organic matter decomposing inoculant (commercially available) of raw material weight in wet base 0.1%, is uniformly mixed, uses
Slot type aerobic composting fermentation mode compost fermentation, fermentation time was at about 24-30 days.
Heavy metal deactivator is mixed by the component of following percentage by weight meter: brown alga charcoal 50%, attapulgite
40%, sepiolite 10%.
Described brown alga charcoal carbonizes after being mixed by following raw material components according to mass percent and makes: sargassum fusifome
60%, Sargassum horneri 30%, sargassum thunbergii 10%.Charing method particularly includes: after raw material components is mixed, in oxygen-free environment, 650 DEG C
Lower cracking 3 hours, naturally cooling.
Embodiment 3:
A kind of reduce the method for heavy metal validity in compost, with chicken manure as composting material, in raw material, add wood chip adjust
Joint raw material C/N ratio for 28:1, regulates raw material pH 7.0, and it is 55% that moisture controls, then adds in raw material and account for raw material weight in wet base
The heavy metal deactivator of 3% and account for the organic matter decomposing inoculant (commercially available) of raw material weight in wet base 0.3%, is uniformly mixed, uses
Slot type aerobic composting fermentation mode compost fermentation, fermentation time was at about 24-30 days.
Heavy metal deactivator is mixed by the component of following percentage by weight meter: brown alga charcoal 40%, attapulgite
50%, sepiolite 10%.
Described brown alga charcoal carbonizes after being mixed by following raw material components according to mass percent and makes: sargassum fusifome
50%, Sargassum horneri 40%, sargassum thunbergii 10%.Charing method particularly includes: after raw material components is mixed, in oxygen-free environment, 650 DEG C
Lower cracking 4 hours, naturally cooling.
Embodiment 4:
The present embodiment difference from Example 3 is: brown alga charcoal is use, described acid after peracid modification
The method of modification is: be placed in acid solution by brown alga charcoal, 500 turns/min stir process 60min, with distillation after taking-up
Water is rinsed well, dries, and pulverizes.Described acid solution be the phosphoric acid of nitric acid and the mass concentration 30% of mass concentration 10% according to 1:
The volume ratio of 1 mixes.
The other the same as in Example 3.
Embodiment 5:
The present embodiment difference from Example 3 is: brown alga charcoal is use, described acid after peracid modification
The method of modification is: be placed in acid solution by brown alga charcoal, 800 turns/min stir process 30min, with distillation after taking-up
Water is rinsed well, dries, and pulverizes.Described acid solution be the phosphoric acid of nitric acid and the mass concentration 20% of mass concentration 15% according to 1:
The volume ratio of 3 mixes.
The other the same as in Example 3.
Embodiment 6:
The present embodiment difference from Example 3 is: described attapulgite uses after modification, described modification
The method processed is: joined by first attapulgite in silane coupler-ethanol solution that mass concentration is 3%, logical nitrogen
Under the conditions of gas, heating 4 hours at 50 DEG C, absolute methanol washs 3 times, is vacuum dried 5h at 60 DEG C.Described silane coupler is
KH550。
The other the same as in Example 3.
Embodiment 7:
The present embodiment difference from Example 3 is: described attapulgite uses after modification, described modification
The method processed is: joined by first attapulgite in silane coupler-ethanol solution that mass concentration is 6%, logical nitrogen
Under the conditions of gas, heating 2 hours at 60 DEG C, absolute methanol washs 5 times, is vacuum dried 3h at 70 DEG C.Described silane coupler is
KH792。
The other the same as in Example 3.
Embodiment 8:
The present embodiment difference from Example 3 is:
Described brown alga charcoal is to use after peracid modification, and the method for described acid modification is: brown alga is raw
Thing charcoal is placed in acid solution, 600 turns/min stir process 40min, clean with distilled water flushing after taking-up, dries, pulverizes.Described
Acid solution is that the nitric acid of mass concentration 10% mixes according to the volume ratio of 1:2 with the phosphoric acid of mass concentration 25%.
Described attapulgite uses after modification, and the method for described modification is: added by first attapulgite
It is in the silane coupler-ethanol solution of 5% to mass concentration, under logical condition of nitrogen gas, heats 3 hours at 55 DEG C, anhydrous
Methyl alcohol washs 4 times, is vacuum dried 4h at 65 DEG C.Described silane coupler is KH550.
The other the same as in Example 3.
Performance test:
1, materials and methods:
Composting material: chicken manure comes from Ningbo Zhong Ci fertilizer Co., Ltd.
Heavy metal additive: arsanilic acid (to phenalgin arsenic acid, total arsenic content is 34%)), copper sulphate, lead acetate, it is purchased from
Reagent Company.
Selecting chicken manure is that its content of beary metal of compost raw material is shown in Table 1, is previously added a certain amount of heavy metal additive: Cu
(actual dried poultrymanure per ton adds 394g CuSO to be about 100ppm (butt), Pb 75ppm, As 30ppm4.5H2O, 137.4g
Lead acetate, 88g arsanilic acid (to phenalgin arsenic acid, total arsenic content is 34%)), fully mix.Then the blunt of different disposal is added
Agent (ratio of passivator is counted on the basis of chicken manure weight in wet base weight in wet base), carries out the technique compost fermentation of the present invention.28 days left sides of composting
Right end is fermented, and sieves, pulverizes, becomes fertilizer.
Content of beary metal in table 1 compost raw material
Test arranges 5 process: CK, compares (being not added with heavy metal deactivator)；T1, adds chicken manure weight in wet base 7.5% concave convex rod
Soil (PAL)；T2, adds chicken manure weight in wet base 7.5% sepiolite；T3, adds chicken manure weight in wet base 1% brown alga charcoal；T4, adds chicken manure wet
Weigh the heavy metal deactivator of 5% present invention.Test site is Ningbo Cixi City Zhong Ci fertilizer Co., Ltd.T1, T2, T3 and T4
About 1000 kilograms of fresh chicken manures of each process (estimate that finished product fertilizer is 0.5 ton).The addition of each group material is all with chicken manure
Calculate on the basis of weight in wet base.
Sampling: ferment 0d (before being not added with passivator) and gather respectively during 28d compost sample mensuration As, Pb, Cu,
The bio-available Zn concentration of Zn and full dose.
The mensuration of fertilizer nutrient and heavy metal full dose is with reference to fertilizer professional standard NY525-2012, and bio-available Zn concentration is adopted
(NY/T 890-2004) is measured with after DTPA extraction method.
According to measurement result, calculate the apportionment ratio of available heavy metal as follows: apportionment ratio=(available heavy metal
Content/heavy metal full dose) × 100%, the heavy metal passivation effect of compost=(before heap after available heavy metal content-heap effectively
State content of beary metal) available heavy metal content × 100% before/heap.Each passivator processes bioavailability of heavy metals after compost
Reducing effect computational methods: passivation effect (%)=(comparison content-processs content)/compare content × 100%.Data side
Difference analysis all uses SPSS13.0 statistical software to be analyzed with the result of multiple comparisons.
2, result
Various passivator are the passivation effect of heavy metal in composting process
Table 2 is the heavy metal full dose of compost, and in composting fermentation process, different content of beary metal have increase to be also reduced.
As can be seen from Table 3, composting process has preferable passivation effect to Pb and As.T1 processes only has certain passivation to imitate to Zn
Really.T2 only has certain passivation effect to Cu.T3 process 4 Heavy Metallic Elements are had good passivation effect, to Cu, Zn,
The passivation effect of Pb and As reaches 29.58%, 23.02%, 45.19% and 21.88% respectively.T4 processes to be had Cu, Zn, Pb, As
Having optimal passivation effect, deactivation rate is respectively 30.07%, and 36.19%, 48.30%, 32.25%.According to available state in compost
From the point of view of distribution of heavy metals rate change (table 4), T3 and T4 process can significantly reduce the apportionment ratio of available heavy metal in compost, and
T1, T2 only available state apportionment ratio to Zn or Cu has certain reduction effect.
Result shows, it is optimal that T4 processes the passivation effect of heavy metal in composting process.
The compost heavy metal full dose that the different passivator of table 2 processes
The different passivator of table 3 processes composting process available heavy metal content and passivation effect
Available heavy metal apportionment ratio change (%) of table 4 compost
Note: apportionment ratio is the percentage that the content of available state accounts for its total amount, is changed to apportionment ratio difference, and " " represents distribution
Reduce after rate difference heap, "+" represent increase.
The present invention adds heavy metal deactivator in composting process and can accelerate compost and start, and is not added with heavy metal deactivator phase
Ratio, can shorten the compost time about 6 days, puies forward dehydration rate 10.3%, reduces nitrogen loss 24.2%.
Embodiment described above is the one preferably scheme of the present invention, not makees the present invention any pro forma
Limit, on the premise of without departing from the technical scheme described in claim, also have other variant and remodeling.
Claims (10)
1. one kind is reduced the method for heavy metal validity in compost, it is characterised in that: with chicken manure as composting material, add in raw material
Entering wood chip or rice bran regulation raw material C/N ratio for 25-30:1, regulate raw material pH6.5-7.5, moisture controls as 50-60%, then
Add in raw material and account for the heavy metal deactivator of raw material weight in wet base 1-5% and be uniformly mixed, use slot type aerobic composting fermentation side
Formula compost fermentation.
Method the most according to claim 1, it is characterised in that: described heavy metal deactivator is by following percentage by weight meter
Component mixes: brown alga charcoal 30-50%, attapulgite 40-60%, sepiolite surplus.
Method the most according to claim 2, it is characterised in that: described brown alga charcoal according to mass percent by following
Carbonize after raw material components mixing and make: sargassum fusifome 40-60%, Sargassum horneri 30-50%, sargassum thunbergii surplus.
Method the most according to claim 3, it is characterised in that: described charing method particularly includes: raw material components is mixed
After, in oxygen-free environment, crack at 600-650 DEG C 3-5 hour, cooling naturally.
5. according to the method described in Claims 2 or 3 or 4, it is characterised in that: described brown alga charcoal is through peracid modification
Rear use, the method for described acid modification is: is placed in acid solution by brown alga charcoal, stir process 30-60min, takes out
Clean with distilled water flushing afterwards, dry, pulverize.
Method the most according to claim 5, it is characterised in that: the rotating speed of described stir process is that 500-800 turns/min.
Method the most according to claim 5, it is characterised in that: described acid solution be mass concentration 10-15% nitric acid with
The phosphoric acid of mass concentration 20-30% mixes according to the volume ratio of 1:1-3.
8. according to the method described in Claims 2 or 3 or 4, it is characterised in that: described attapulgite makes after modification
With, the method for described modification is: first attapulgite joins silane coupler-anhydrous second that mass concentration is 3-6%
In alcoholic solution, under logical condition of nitrogen gas, heating 2-4 hour at 50-60 DEG C, absolute methanol washs 3-5 time, and at 60-70 DEG C, vacuum is done
Dry 3-5h.
Method the most according to claim 8, it is characterised in that: described silane coupler is in KH550, KH560, KH792
One.
10. according to the method described in claim 1 or 2 or 3 or 4, it is characterised in that: raw material also added organic material composting
Agent, the consumption of organic matter decomposing inoculant is the 0.1-0.3% of raw material weight in wet base.
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| CN106495877A (en) * | 2016-10-25 | 2017-03-15 | 黑龙江省农业科学院农村能源研究所 | The high-rate composting technology of suitable Han Qu and the preparation method of the rotten microbial inoculum of rush |
| CN106538882A (en) * | 2016-10-13 | 2017-03-29 | 浙江省海洋水产研究所 | The scavenger of heavy metal in a kind of removable aquatic products |
| CN106866234A (en) * | 2017-02-14 | 2017-06-20 | 浙江省农业科学院 | The compost method of antibiotic in a kind of efficient degradation feces of livestock and poultry |
| CN107082542A (en) * | 2017-05-31 | 2017-08-22 | 李清源 | A kind of method for reducing feces of farm pollution |
| CN107540478A (en) * | 2017-09-28 | 2018-01-05 | 房坤华 | A kind of Chicken Manure Compost method of suitable for limed |
| CN107935640A (en) * | 2017-12-29 | 2018-04-20 | 青岛农业大学 | It is a kind of to accelerate decomposed additive of pig manure and its preparation method and application |
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| CN106866234A (en) * | 2017-02-14 | 2017-06-20 | 浙江省农业科学院 | The compost method of antibiotic in a kind of efficient degradation feces of livestock and poultry |
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| CN107935640B (en) * | 2017-12-29 | 2021-03-02 | 青岛农业大学 | Additive for accelerating compost maturity of pig manure and preparation method and application thereof |
| CN107935640A (en) * | 2017-12-29 | 2018-04-20 | 青岛农业大学 | It is a kind of to accelerate decomposed additive of pig manure and its preparation method and application |
| CN108329106A (en) * | 2018-03-28 | 2018-07-27 | 农业部规划设计研究院 | A kind of pig manure aerobic fermentation heavy metals in process passivating method |
| CN108409362A (en) * | 2018-03-28 | 2018-08-17 | 农业部规划设计研究院 | A kind of heavy metal deactivator and preparation method thereof for livestock excrement composting |
| CN109400393A (en) * | 2018-12-29 | 2019-03-01 | 中国科学院沈阳应用生态研究所 | Heavy metal is passivated and protects nitrogen method in a kind of feces of livestock and poultry aerobic composting process |
| CN110988270A (en) * | 2019-12-24 | 2020-04-10 | 南通中智检测服务有限公司 | Method for measuring content of quick-acting metal in solid water-insoluble fertilizer |
| CN112266274A (en) * | 2020-09-16 | 2021-01-26 | 河北中科定洋农业科技集团有限公司 | Environment-friendly livestock manure recycling method |
| CN114874053A (en) * | 2022-05-05 | 2022-08-09 | 内蒙古分享收获农业开发有限公司 | Preparation method of wormcast biological organic fertilizer |
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Application publication date: 20160831 Assignee: Longyou Wangnong Organic Fertilizer Co., Ltd. Assignor: Zhejiang Academy of Agricultural Sciences Contract record no.: X2019330000010 Denomination of invention: Method for reducing efficiency of heavy metals in compost Granted publication date: 20180626 License type: Common License Record date: 20190820 |