CN110407613A - Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge - Google Patents
Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge Download PDFInfo
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- CN110407613A CN110407613A CN201910751973.1A CN201910751973A CN110407613A CN 110407613 A CN110407613 A CN 110407613A CN 201910751973 A CN201910751973 A CN 201910751973A CN 110407613 A CN110407613 A CN 110407613A
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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
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
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Abstract
The invention discloses the applications that Vermicomposting is used to cut down nano oxidized Copper electrodissolution in sludge, relate generally to the processing, disposition and application technology as the second resource field of solid waste.The beneficial effects of the present invention are: provide it is a kind of utilize Vermicomposting cut down excess sludge in nano oxidized Copper electrodissolution and the method for improving compost fertilizer efficiency.
Description
Technical field
The present invention relates to the processing of solid waste, disposition and application technology as the second resource field, specifically Vermicomposting is used
In the application for cutting down nano oxidized Copper electrodissolution in sludge.
Background technique
Nanosecond science and technology are one " double-edged swords ", and while promoting development in science and technology, it is dirty also to have caused quite serious environment
Dye and ecological murder by poisoning problem.The authoritative journals such as Science, Nature have successively published commentary, to appeal to reinforce
The research of environmental behaviour and ecotoxicity effect about nano-metal-oxide.By taking nano cupric oxide as an example, due to it is magnetic,
The characteristic of thermal resistance, chemical activity, antibiotic property and photocatalysis etc. has been widely used for new material preparation, antimicrobial coating
And the fields such as catalysis treatment of organic pollutant, however it is inevitable in production, transport, use and scrapping process
It is discharged into environment by all means, to cause serious environmental pollution and ecological murder by poisoning problem.As sewage to ring
Last one of barrier of border discharge into water, sewage plant become the final whereabouts of the nano-metal-oxide in water body, and pass through suction
Attached, cohesion and precipitation are enriched in excess sludge.
Content of the nano-metal-oxide in excess sludge be from more than ten mg/g-TSS to thousands of mg/g-TSS etc. at present,
And with the continuous application of nano material, ever-increasing trend is shown in excess sludge, therefore about nanogold
Belong to the research hotspot that oxide has become environmental area to the harmfulness of conventional sludge treatment technique.As Mu et al. has found nanometer
ZnO can generate toxic action to the anaerobe system during excess sludge anaerobic fermentation methane phase, and due to Cu2+Itself
Inhibitory effect so that the toxicity of nano cupric oxide is more significant, the nano cupric oxide being enriched in excess sludge is managed in sludge
In the case where changing property change, Cu can be released2+, more serious heavy metal toxicity is caused, so that it is normal to influence anaerobic digestion etc.
The processing method of the excess sludge of rule, such as Otero-onz á lez research shows that the nano cupric oxide of 1.75mg/L can send out anaerobism
Ferment system produces long-range effects, so that the treatment effect of excess sludge anaerobic digestion methane phase is influenced, and Luna-delRisco is then
It was found that the nano cupric oxide of 15mg/L will lead to the methane production decline 30% of excess sludge anaerobic fermentation, thus by nano oxygen
Change Cu-W ore deposit excess sludge itself this how to go to handle, whether the toxicity of nano cupric oxide can be cut in treated sludge
Subtract, if it can be again introduced by the treatment approach of sludge in environment and cause secondary pollution, these problems then urgently environment work
Author solves.
Summary of the invention
The purpose of the present invention is to provide the applications that Vermicomposting is used to cut down nano oxidized Copper electrodissolution in sludge, it is provided
It is a kind of that Vermicomposting is utilized to cut down nano oxidized Copper electrodissolution and the method for improving compost fertilizer efficiency in excess sludge.
The present invention to achieve the above object, is achieved through the following technical solutions:
Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge.
Further, Vermicomposting is carried out using following methods:
Step 1, the sludge containing nano oxidized Cu-W ore deposit is placed 5~9 days under ventilation condition, leavening agent mixing is added
Uniformly, composting substrate is obtained；
Step 2, it says that the fowl and animal excrement of desiccation adjusts humidity to 60 ± 5%, obtains buffering material；
Step 3, filling composting substrate and buffering material, and are inoculated with earthworm, under shady and cool dark condition, using compost temperature
20 DEG C~30 DEG C of degree, compost humidity 55%~65% carry out compost.
Further, in the step 3, the composting substrate and buffering material charge according to the method for layer-by-layer interval filling
Four layers, and bottom is composting substrate layer, the buffering that earthworm is seeded in top layer is material bed interior.
Further, in the step 3, compost is carried out using wooden Vermicomposting reactor, the Vermicomposting is anti-
Answering device includes the first reaction box, the second reaction box, back box, and first reaction box and the second reaction box are used to filling compost,
The bottom of first reaction box and the second reaction box is mesh-structured, pile above and below first reaction box and the second reaction box
Folded setting.
Further, the filling composting substrate in the step 3 and buffering material, and it is inoculated with earthworm, shady and cool dark
Under the conditions of, using 20 DEG C~30 DEG C of compost temperature, compost humidity 55%~65% carries out compost and includes:
The Vermicomposting reactor being made of the first reaction box, the second reaction box and back box is constructed, the first reaction box piles up
In the top of the second reaction box and the bottom plate of the two be it is mesh-structured, back box setting is in bottom for picking up blanking and escape earthworm
Earthworm loads 4 layers in such a way that composting substrate and buffering material alternately load in the first reaction box and the second reaction box, and most
Lower layer is buffering material, earthworm is seeded in the composting substrate of the first reaction box top layer, and covers the rice of one layer of 1~2cm thickness
Grass makes temperature be kept for 25 DEG C under 24 hours fluorescent lamp irradiation conditions, and humidity keeps 60%, carries out compost；To the first reaction box
After compost, the matured compost product in the first reaction box is recycled, and the first reaction box recharge and is placed on the
Two reaction boxes continue below compost；Repeating aforesaid operations makes the first reaction box and the second reaction box be alternately located in top realization company
Continuous compost.
Further, the nano cupric oxide concentration range of applied sludge is 100~2000mg nano cupric oxide/kg-
TSS, the partial size of nano cupric oxide are 20-40nm.
Further, the leavening agent includes sawdust, sawdust, stalk, any one or any a variety of group in wheat bran
It closes；
And/or
The buffering material includes any one of dry cow dung, dry pig manure, dry chicken and duck goose excrement or several combinations.
Further, the sludge is mixed with leavening agent by weight ratio 10:0.5~1 of dry weight.
Further, in the step 3, every layer heap fertilizer ground substance and/or buffering material with a thickness of 5~15cm.
Further, the earthworm of inoculation is Eisenia Foetida, and weight is 0.2~0.5g/ item.
Further, it is 150g's that the inoculum concentration of the earthworm, which adds live weight by the composting substrate of every 1 kilogram of weight in wet base,
Earthworm.
Further, the single compost time of the first reaction box and/or the second reaction box is 50~70d.
The prior art is compared, the beneficial effects of the present invention are:
Vermicomposting has obtained relatively broad answer in processing city excess sludge as a kind of eco-treatment technology
With.Applicant for a long time carry out sludge Vermicomposting research process in find, when in composting substrate contain suitable nano oxygen
Change copper when, the upgrowth situation of earthworm instead less nano cupric oxide when to get well, analyze its reason and be considered due to nano oxidized
Copper can mitigate the reduction of matrix pH value caused by organic matter degradation mineralising as basic anhydride in compost, to be earthworm
Growth create good condition.And well-grown earthworm, then it can promote the shape of available nitrogen in composting substrate, rapid available phosphorus again
At, and the degree of humification of composting substrate is improved, to significantly improve the fertilizer efficiency of composting production.
In the present invention, the BCR recommended using European Economic Community's reference mechanisms (EU criteria measurement and mechanism for testing)
The toxic effect that continuous extraction cuts down nano cupric oxide to Vermicomposting is evaluated, to the Form division of Cu in excess sludge
For sour solvent, can reduction-state, oxidable state and residual form, and think that first two form (sour solvent and can reduction-state) is unstable
Form, eco-toxicity is high, and latter two form (oxidable state and residual form) is stable form, and eco-toxicity is low, by adding
Add leavening agent and buffering material, adjusts matrix physicochemical property, by the synergistic effect mechanism of earthworm in composting process and microorganism,
So that be enriched in the never stable form (toxicity high) of Cu form in the nano cupric oxide in excess sludge to stable form into
Row conversion (toxicity is low), to realize the reduction of nano oxidized Copper electrodissolution in excess sludge.By measuring available nitrogen, rapid available phosphorus
And the fertilizer efficiency of matrix after compost is measured using three-dimensional fluorescence spectrum reflection degree of humification.
The invention has the beneficial effects that: significantly reduce unstable form in the excess sludge polluted by nano cupric oxide
Copper shared by ratio, to reduce the eco-toxicity of nano cupric oxide, while significantly improving the fertilizer efficiency of composting substrate,
A kind of new method is provided for the processing, disposition and resource utilization of the excess sludge polluted by nano cupric oxide.By this
Available nitrogen, available phosphorus contents and the degree of humification of composting substrate significantly improve after method processing, may be used as soil improvement
Agent improves land fertility, to realize the toxicity reduction of nano cupric oxide in the excess sludge polluted by nano cupric oxide and remain
The recycling of remaining sludge.
Detailed description of the invention
Attached drawing 1 is Vermicomposting reactor schematic diagram used in the present invention；
Attached drawing 2 is Vermicomposting reactor B-B sectional view used in the present invention；
Attached drawing 3 is Vermicomposting reactor C-C sectional view used in the present invention；
Attached drawing 4 is implementation flow chart of the invention；
Attached drawing 5 be reference examples of the present invention and embodiment composting substrate humus three-dimensional fluorescence figure (Ex: excitation wavelength, Em:
Launch wavelength).
Label shown in attached drawing:
1, the first reaction box；2, the second reaction box；3, back box；4, material is buffered；5, composting substrate；6, bottom plate hole；7,
Earthworm.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within range defined herein.
Embodiment 1: 7 compost of earthworm is used to cut down the application of nano oxidized Copper electrodissolution in sludge, and specific method step includes:
A certain amount of nano cupric oxide is weighed, going for the neopelex for being 0.1% containing mass fraction is added
In ionized water, it is configured to nano oxidized copper solution, is then added in the dehydration excess sludge of municipal sewage plant acquisition, people
Work turns uniformly to be prepared into (is kept the nano cupric oxide in wherein excess sludge dense by the excess sludge that nano cupric oxide pollutes
Degree is 1000mg nano cupric oxide/kg-TSS).The excess sludge polluted by nano cupric oxide is placed in ventilation sunning 7d, is pressed
Leavening agent sawdust is added according to quality dry weight 10:0.5 (excess sludge: leavening agent), adjusting humidity with tap water is 60 ± 5%, is mixed
Synthesize uniform composting substrate 5.It is 60 ± 5% that the dry cow dung tap water that farm is obtained, which adjusts humidity, is prepared into slow
Rush material 4.In the first reaction box 1 and the second reaction box 2,4 one layer heap fertilizer ground substance 5 of material is buffered according to one layer from bottom to top
Sequence charges, and amounts to and loads 4 layers, then the second reaction box 2 is placed on chassis 3 by every layer height 10cm, the first reaction box 1
It is placed on the second reaction box 2, covers one layer of straw for shading on the first reaction box 1 and prevents moisture from evaporating.In earthworm 7
It is thrown in one reaction box, 1 upper layer composting substrate 5 according to the inoculum concentration that every kilogram of matrix (weight in wet base) adds 100g earthworm 7 (live weight)
Add weight is the Eisenia Foetida of 0.25g/ item, and the straw of one layer of 1-2cm thickness is then covered on upper layer for shading and prevents harnessing the river
Divide evaporation, be then integrally placed to compost reactor in the room of chronic sun light irradiation, is kept for 25 DEG C of temperature, humidity 60
± 5%, carry out compost reaction in 50 days by a definite date.During compost reacts, due to the irradiation of light and being protected from light for 7 instinct of earthworm
Property, so that the earthworm 7 in the first reaction box 1 will not escape upwards, but in 4 layers of the buffering material of the first reaction box 1 and compost
It shuttles and looks for food between 5 layers of matrix.Compost for a period of time after, ingest in the composting substrate 5 in the first reaction box 1 for earthworm 7
Nutriment is gradually deficient, and the earthworm 7 in the first reaction box 1 can gradually pass through the perforation of the first reaction box 1 due to sitotaxis instinct
Hole on bottom plate enters the second reaction box 2, continues ingest composting substrate 5 and buffering material 4, and remaining in the first reaction box 1
For decomposed composting production.After compost, by the matured compost Product recycling in the first reaction box 1, then in the first reaction
It charges again in box 1 according to the sequence for buffering 4 one layer heap fertilizer ground substance 5 of material according to one layer from bottom to top, amounts to and load 4 layers, often
First reaction box 1 is placed in back box 3 by layer height 10cm, and the second reaction box 2 is placed on the first reaction box 1, repeat into
Row compost reaction, until composting substrate 5 is completely decomposed in the second reaction box 2 becomes composting production.Repeatedly, reason can be realized
By the continuous processing for the excess sludge that nano cupric oxide pollutes.Cu in BCR continuous extraction measurement matrix is utilized to composting production
Form, and calculate each form Cu (sour solvent, can reduction-state, oxidable state and residual form) proportion, while measuring compost
Available nitrogen, rapid available phosphorus and the degree of humification of product.
Embodiment 2: 7 compost of earthworm is used to cut down the application of nano oxidized Copper electrodissolution in sludge, and specific method step includes:
Using 7 compost of earthworm cut down excess sludge in nano oxidized Copper electrodissolution and the method for improving compost fertilizer efficiency, it be by
What following steps carried out: weighing a certain amount of nano cupric oxide, the dodecyl benzene sulfonic acid for being 0.1% containing mass fraction is added
In the deionized water of sodium, it is configured to nano oxidized copper solution, the dehydration for being then added to municipal sewage plant acquisition is remaining dirty
In mud, manually turning uniformly to be prepared into (is made the nano oxygen in wherein excess sludge by the excess sludge that nano cupric oxide pollutes
Change copper concentration is 500mg nano cupric oxide/kg-TSS).The excess sludge polluted by nano cupric oxide is placed in ventilation sunning
7d adds leavening agent stalk according to quality dry weight 10:1 (excess sludge: leavening agent), and adjusting humidity with tap water is 60 ± 5%,
It is mixed into uniform composting substrate 5.It is 60 ± 5% that the dry cow dung tap water that farm is obtained, which adjusts humidity, is prepared into
Buffer material 4.In the first reaction box 1 and the second reaction box 2, from bottom to top according to one layer of 4 one layer heap fertilizer ground substance 5 of buffering material
Sequence charging, amount to load 4 layers, then the second reaction box 2 is placed on chassis 3, the first reaction box by every layer height 10cm
1 is placed on the second reaction box 2, covers one layer of straw for shading on the first reaction box 1 and prevents moisture from evaporating.In earthworm 7
The inoculum concentration of 50g earthworm 7 (live weight) is added in first reaction box, 1 upper layer composting substrate 5 according to every kilogram of matrix (weight in wet base)
Add weight be 0.2~0.5g/ item Eisenia Foetida, then upper layer cover one layer of 1-2cm thickness straw be used for shading and
Moisture evaporation is prevented and treated, is then integrally placed to compost reactor in the room of chronic sun light irradiation, is kept for 25 DEG C of temperature,
Humidity 60 ± 5% carries out compost reaction in 60 days by a definite date.During compost reacts, due to irradiation and earthworm 7 instinct of light
Photophobism so that the earthworm 7 in the first reaction box 1 will not escape upwards, but 4 layers of the buffering material of the first reaction box 1 with
It shuttles and looks for food between 5 layers of composting substrate.Compost for a period of time after, taken the photograph in the composting substrate 5 in the first reaction box 1 for earthworm 7
The nutriment of food is gradually deficient, and the earthworm 7 in the first reaction box 1 can gradually pass through the first reaction box 1 due to sitotaxis instinct
Hole on perforation plate enters the second reaction box 2, continues ingest composting substrate 5 and buffering material 4, and in the first reaction box 1
Remaining is decomposed composting production.After compost, by the matured compost Product recycling in the first reaction box 1, then first
It charges again in reaction box 1 according to the sequence for buffering 4 one layer heap fertilizer ground substance 5 of material according to one layer from bottom to top, amounts to and load 4
First reaction box 1 is placed in back box 3, the second reaction box 2 is placed on the first reaction box 1 by layer, every layer height 10cm,
Repeat compost reaction, until composting substrate 5 is completely decomposed in the second reaction box 2 becomes composting production.Repeatedly
Realize the continuous processing for the excess sludge that reason is polluted by nano cupric oxide.Base is measured using BCR continuous extraction to composting production
The form of Cu in matter, and each form Cu (sour solvent, can reduction-state, oxidable state and residual form) proportion is calculated, it surveys simultaneously
Determine the available nitrogen, rapid available phosphorus and degree of humification of composting production.
Embodiment 3: 7 compost of earthworm is used to cut down the application of nano oxidized Copper electrodissolution in sludge, and specific method step includes:
Using 7 compost of earthworm cut down excess sludge in nano oxidized Copper electrodissolution and the method for improving compost fertilizer efficiency, it be by
What following steps carried out: weighing a certain amount of nano cupric oxide, the dodecyl benzene sulfonic acid for being 0.1% containing mass fraction is added
In the deionized water of sodium, it is configured to nano oxidized copper solution, the dehydration for being then added to municipal sewage plant acquisition is remaining dirty
In mud, manually turning uniformly to be prepared into (is made the nano oxygen in wherein excess sludge by the excess sludge that nano cupric oxide pollutes
Change copper concentration is 1500mg nano cupric oxide/kg-TSS).The excess sludge polluted by nano cupric oxide is placed in ventilation sunning
7d adds leavening agent wheat bran according to quality dry weight 10:1 (excess sludge: leavening agent), and adjusting humidity with tap water is 60 ± 5%,
It is mixed into uniform composting substrate 5.It is 60 ± 5% that the dry cow dung tap water that farm is obtained, which adjusts humidity, is prepared into
Buffer material 4.In the first reaction box 1 and the second reaction box 2, from bottom to top according to one layer of 4 one layer heap fertilizer ground substance 5 of buffering material
Sequence charging, amount to load 4 layers, then the second reaction box 2 is placed on chassis 3, the first reaction box by every layer height 10cm
1 is placed on the second reaction box 2, covers one layer of straw for shading on the first reaction box 1 and prevents moisture from evaporating.In earthworm 7
The inoculum concentration of 50g earthworm 7 (live weight) is added in first reaction box, 1 upper layer composting substrate 5 according to every kilogram of matrix (weight in wet base)
Add weight be 0.2~0.5g/ item Eisenia Foetida, then upper layer cover one layer of 1-2cm thickness straw be used for shading and
Moisture evaporation is prevented and treated, is then integrally placed to compost reactor in the room of chronic sun light irradiation, is kept for 25 DEG C of temperature,
Humidity 60 ± 5% carries out compost reaction in 60 days by a definite date.During compost reacts, due to irradiation and earthworm 7 instinct of light
Photophobism so that the earthworm 7 in the first reaction box 1 will not escape upwards, but 4 layers of the buffering material of the first reaction box 1 with
It shuttles and looks for food between 5 layers of composting substrate.Compost for a period of time after, taken the photograph in the composting substrate 5 in the first reaction box 1 for earthworm 7
The nutriment of food is gradually deficient, and the earthworm 7 in the first reaction box 1 can gradually pass through the first reaction box 1 due to sitotaxis instinct
Hole on perforation plate enters the second reaction box 2, continues ingest composting substrate 5 and buffering material 4, and in the first reaction box 1
Remaining is decomposed composting production.After compost, by the matured compost Product recycling in the first reaction box 1, then first
It charges again in reaction box 1 according to the sequence for buffering 4 one layer heap fertilizer ground substance 5 of material according to one layer from bottom to top, amounts to and load 4
First reaction box 1 is placed in back box 3, the second reaction box 2 is placed on the first reaction box 1 by layer, every layer height 10cm,
Repeat compost reaction, until composting substrate 5 is completely decomposed in the second reaction box 2 becomes composting production.Repeatedly
Realize the continuous processing for the excess sludge that reason is polluted by nano cupric oxide.Base is measured using BCR continuous extraction to composting production
The form of Cu in matter, and each form Cu (sour solvent, can reduction-state, oxidable state and residual form) proportion is calculated, it surveys simultaneously
Determine the available nitrogen, rapid available phosphorus and degree of humification of composting production.
Embodiment 4: it is used to cut down the comparative examples of the application of nano oxidized Copper electrodissolution in sludge for 7 compost of earthworm
Where advantage to highlight the invention patent, spy carries out the implementation of following comparative example to carry out to as directed:
Comparative example 1 (excess sludge not polluted by nano cupric oxide)
Using deionized water configuration containing mass fraction be 0.1% neopelex solution, then according to
The additive amount of embodiment 1 is added in the dehydration excess sludge of municipal sewage plant acquisition, is manually turned uniformly, is prepared into
The excess sludge not polluted by nano cupric oxide.It will be placed in ventilation sunning 7d by the excess sludge that nano cupric oxide pollutes,
Leavening agent sawdust is added according to quality dry weight 10:0.5 (excess sludge: leavening agent), adjusting humidity with tap water is 60 ± 5%,
It is mixed into uniform composting substrate 5.It is 60 ± 5% that the dry cow dung tap water that farm is obtained, which adjusts humidity, is prepared into
Buffer material 4.In the first reaction box 1 and the second reaction box 2, from bottom to top according to one layer of 4 one layer heap fertilizer ground substance 5 of buffering material
Sequence charging, amount to load 4 layers, then the second reaction box 2 is placed on chassis 3, the first reaction box by every layer height 10cm
1 is placed on the second reaction box 2, covers one layer of straw for shading on the first reaction box 1 and prevents moisture from evaporating.In earthworm 7
The inoculum concentration of 25g earthworm 7 (live weight) is added in first reaction box, 1 upper layer composting substrate 5 according to every kilogram of matrix (weight in wet base)
Add weight be 0.2~0.5g/ item Eisenia Foetida, then upper layer cover one layer of 1-2cm thickness straw be used for shading and
Moisture evaporation is prevented and treated, is then integrally placed to compost reactor in the room of chronic sun light irradiation, is kept for 25 DEG C of temperature,
Humidity 60 ± 5% carries out compost reaction in 50 days by a definite date.After compost, the matured compost product in the first reaction box 1 is returned
Receive available nitrogen, rapid available phosphorus and the degree of humification of measurement composting production.
Comparative example 2 (does not add earthworm 7)
A certain amount of nano cupric oxide is weighed, going for the neopelex for being 0.1% containing mass fraction is added
In ionized water, it is configured to nano oxidized copper solution, is then added in the dehydration excess sludge of municipal sewage plant acquisition, people
Work turns uniformly to be prepared into (is kept the nano cupric oxide in wherein excess sludge dense by the excess sludge that nano cupric oxide pollutes
Degree is 500mg nano cupric oxide/kg-TSS).The excess sludge polluted by nano cupric oxide is placed in ventilation sunning 7d, according to
Quality dry weight 10:1 (excess sludge: leavening agent) adds leavening agent stalk, and adjusting humidity with tap water is 60 ± 5%, is mixed into
Uniform composting substrate 5.It is 60 ± 5% that the dry cow dung tap water that farm is obtained, which adjusts humidity, is prepared into cushion
Material 4.In the first reaction box 1 and the second reaction box 2, the sequence of 4 one layer heap fertilizer ground substance 5 of material is buffered according to one layer from bottom to top
Charging amounts to and loads 4 layers, then the second reaction box 2 is placed on chassis 3 by every layer height 10cm, and the first reaction box 1 is placed
On the second reaction box 2, one layer of straw is covered for shading on the first reaction box 1 and prevents moisture from evaporating.One is covered on upper layer
Then compost reactor has been integrally placed to chronic sun lamp for shading and prevention and treatment moisture evaporation by the straw of layer 1-2cm thickness
In the room of irradiation, kept for 25 DEG C of temperature, humidity 60 ± 5% carries out compost reaction in 60 days by a definite date.After compost, by
Matured compost Product recycling in one reaction box 1 measures the form of Cu in matrix to composting production using BCR continuous extraction,
And each form Cu (sour solvent, can reduction-state, oxidable state and residual form) proportion is calculated, while measuring the speed of composting production
Imitate nitrogen, rapid available phosphorus and degree of humification.
Comparative example 3 (is not provided with buffer layer)
A certain amount of nano cupric oxide is weighed, going for the neopelex for being 0.1% containing mass fraction is added
In ionized water, it is configured to nano oxidized copper solution, is then added in the dehydration excess sludge of municipal sewage plant acquisition, people
Work turns uniformly to be prepared into (is kept the nano cupric oxide in wherein excess sludge dense by the excess sludge that nano cupric oxide pollutes
Degree is 1500mg nano cupric oxide/kg-TSS).The excess sludge polluted by nano cupric oxide is placed in ventilation sunning 7d, is pressed
Leavening agent wheat bran is added according to quality dry weight 10:1 (excess sludge: leavening agent), adjusting humidity with tap water is 60 ± 5%, mixing
At uniform composting substrate 5.In the first reaction box 1 and the second reaction box 2, the composting substrate 5 of a height of 20cm of layer is loaded.In earthworm
The inoculation of 50g earthworm 7 (live weight) is added in 7 first reaction box of earthworm, 1 upper layer composting substrate 5 according to every kilogram of matrix (weight in wet base)
Amount adds the Eisenia Foetida that weight is 0.2~0.5g/ item, is then used for shading in the straw that upper layer covers one layer of 1-2cm thickness
And prevention and treatment moisture evaporation, then compost reactor is integrally placed in the room of chronic sun light irradiation, keeps temperature 25
DEG C, humidity 60 ± 5% carries out compost reaction in 60 days by a definite date.After compost, the matured compost in the first reaction box 1 is produced
Product recycling.To composting production using BCR continuous extraction measurement matrix in Cu form, and calculate each form Cu (sour solvent, can
Reduction-state, oxidable state and residual form) proportion, while measuring the available nitrogen, rapid available phosphorus and degree of humification of composting production.
7 biomass of earthworm, the toxicity reduction of nano cupric oxide and fertilizer efficiency are analyzed in comparative example and embodiment:
Comparative example and 7 biomass of earthworm in embodiment are as shown in table 1 after compost.
Table 1
As can be seen from Table 1, in embodiment under conditions of the nano oxidized copper concentration of matrix, earthworm 7 can normally be deposited
Living, 7 biomass of earthworm is risen after compost, and (i.e. excess sludge is not by CuO higher than comparative example 1 for 7 biomass of earthworm
When NPs pollutes), it is indicated above that earthworm 7 can in the excess sludge polluted by nano cupric oxide growth and breeding and in compost mistake
Its regulating and controlling effect is played in journey, and in matrix suitable CuO NPs presence, it is possible to alleviate organic matter point to a certain extent
The factors such as the reduction of pH value caused by the substances mineralisings such as solution, nitrogen phosphorus, so that condition advantageously is created in the growth for earthworm 7,
So 7 biomass of earthworm in embodiment is higher than 7 biomass of earthworm in comparative example 1.
Comparative example and different shape Cu proportion in embodiment composting production are as shown in table 2 after compost.
Table 2
As can be seen from Table 2, unstable form Cu proportion does not add the comparative example 2 of earthworm 7 in embodiment 1,2,3
It compares, has dropped 83.1%, 68.9% and 67.6% respectively；Unstable form Cu proportion does not add in embodiment 1,2,3
Add the comparative example 3 of buffering material 4 to compare, has dropped 80.9%, 64.9% and 63.5% respectively.It is indicated above in addition conditioner
Afterwards using 7 compost treatment of earthworm by the excess sludge of nano cupric oxide, in matrix, ratio shared by the Cu of unstable form is not more
When adding earthworm 7 and to be substantially reduced when addition buffering material 4, i.e., method provided by the present invention can significantly cut down enrichment
The eco-toxicity of Cu in nano cupric oxide in excess sludge.
Comparative example and the content of rapid available phosphorus and available nitrogen in embodiment composting production are as shown in table 3 after compost.
Table 3
As can be seen from Table 3, after compost, the available nitrogen of composting production, available phosphorus contents are more right in embodiment 1,2,3
Ratio 1 (when i.e. excess sludge is not polluted by CuO NPs) is compared, and is not decreased obviously；Compared with comparative example 2 (not adding earthworm 7) phase
62.5%, 45.1% and 73.8% has been increased separately than, quick-acting nitrogen contents, available phosphorus contents have increased separately 63.0%,
45.1% and 72.7%；It is compared compared with comparative example 3 (do not add buffering material 4), available phosphorus contents have increased separately 97.9%,
76.7% and 111.6%, available phosphorus contents have increased separately 142.6%, 149.3% and 156.9%.It is i.e. provided by the present invention
Method enables to the excess sludge polluted by nano cupric oxide on its available nitrogen, available phosphorus contents after treatment are significant
It rises, the excess sludge than not polluted by nano cupric oxide is not that raw material carries out 7 compost of earthworm composting production fertilizer efficiency obtained
There is excessive loss.
Comparative example and the degree of humification of embodiment composting production are as shown in Figure 5 after compost.
As seen from Figure 5, after compost, the heap of embodiment 1,2,3 and comparative example 1 (not polluted by nano cupric oxide)
Fertilizer product, the characteristic peak that humic acid is characterized at Ex/Em=370/465nm does not show significantly to distinguish, and comparative example 2
Apparent characteristic peak is not being shown at Ex/Em=370/465nm with 3.Method i.e. provided by the present invention enables to
It is significantly improved by the excess sludge that nano cupric oxide pollutes in its degree of humification after treatment, not than not by nano oxidized
The excess sludge of Cu-W ore deposit be raw material carry out 7 compost of earthworm composting production obtained degree of humification show it is too many under
Drop.
Claims (10)
1. the application that Vermicomposting is used to cut down nano oxidized Copper electrodissolution in sludge.
2. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 1, which is characterized in that
Vermicomposting is carried out using following methods:
Step 1, the sludge containing nano oxidized Cu-W ore deposit is placed 5~9 days under ventilation condition, it is equal that leavening agent mixing is added
It is even, obtain composting substrate；
Step 2, the fowl and animal excrement of desiccation is adjusted into humidity to 60 ± 5%, obtains buffering material；
Step 3, filling composting substrate and buffering material, and are inoculated with earthworm, under shady and cool dark condition, using compost temperature 20
DEG C~30 DEG C, compost humidity 55%~65% carries out compost.
3. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 1, which is characterized in that
In the step 3, the composting substrate and buffering material charge four layers according to the method for layer-by-layer interval filling, and bottom is compost
Hypothallus, the buffering that earthworm is seeded in top layer are material bed interior.
4. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 3, which is characterized in that
In the step 3, compost is carried out using wooden Vermicomposting reactor, the Vermicomposting reactor includes the first reaction
Box, the second reaction box, back box, first reaction box and the second reaction box be used to filling compost, first reaction box and
The bottom of second reaction box is mesh-structured, first reaction box and the folded setting of pile up and down of the second reaction box.
5. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 1, which is characterized in that
Filling composting substrate in the step 3 and buffering material, and be inoculated with earthworm, under shady and cool dark condition, using compost temperature
20 DEG C~30 DEG C of degree, compost humidity 55%~65% carry out compost and include:
Construct the Vermicomposting reactor that is made of the first reaction box, the second reaction box and back box, the first reaction box is piled up the
The top of two reaction boxes and the bottom plate of the two be it is mesh-structured, back box setting bottom for pick up blanking and escape earthworm,
4 layers are loaded in such a way that composting substrate and buffering material alternately load in the first reaction box and the second reaction box, and most lower
Layer is buffering material, earthworm is seeded in the composting substrate of the first reaction box top layer, and covers the straw of one layer of 1~2cm thickness,
Under 24 hours fluorescent lamp irradiation conditions, temperature is made to be kept for 25 DEG C, humidity keeps 60%, carries out compost；To the first reaction box heap
After fertilizer, the matured compost product in the first reaction box is recycled, and recharge to the first reaction box and be placed on second
Reaction box continues below compost；Repeating aforesaid operations makes the first reaction box and the second reaction box be alternately located in top realization continuously
Compost.
6. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 1, which is characterized in that
The nano cupric oxide concentration range of applied sludge is 100~2000mg nano cupric oxide/kg-TSS, the partial size of nano cupric oxide
For 20-40nm.
7. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 1, which is characterized in that
The leavening agent includes sawdust, sawdust, stalk, any one or any a variety of combination in wheat bran；
And/or
The buffering material includes any one of dry cow dung, dry pig manure, dry chicken and duck goose excrement or several combinations.
8. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 1, which is characterized in that
The sludge is mixed with leavening agent by weight ratio 10:0.5~1 of dry weight.
9. being used to cut down the application of nano oxidized Copper electrodissolution in sludge according to the Vermicomposting of claim 3 or 5, feature exists
In, in the step 3, every layer heap fertilizer ground substance and/or buffering material with a thickness of 5~15cm.
10. Vermicomposting is used to cut down the application of nano oxidized Copper electrodissolution in sludge according to claim 1, feature exists
In the earthworm of inoculation is Eisenia Foetida, and weight is 0.2~0.5g/ item.
And/or
The inoculum concentration of the earthworm is added the earthworm that live weight is 150g by the composting substrate of every 1 kilogram of weight in wet base.
And/or
The single compost time of first reaction box and/or the second reaction box is 50~70d.
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