CN109731883A - A kind of refuse landfill vapor phase contaminants original position reduction system based on intercal type functional layer - Google Patents
A kind of refuse landfill vapor phase contaminants original position reduction system based on intercal type functional layer Download PDFInfo
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Abstract
The invention discloses a kind of, and the refuse landfill vapor phase contaminants based on intercal type functional layer cut down system in situ, and the system comprises more than the junk-heap body of refuse landfill, Closure cover system intercal type functional layer arranged below；The intercal type functional layer includes the ventilative film layer set gradually, functional stuffing layer and HDPE film layer, is additionally provided with non-power air automatic switching system in the functional stuffing layer.Due to the mineralized waste content of organic matter in functional stuffing layer is high, more than micro organism quantity and the features such as sludge carbon pore structure is abundant, oxidation ammonolysis rice straw nitrogen content is high, installing non-power air automatic switching system can promote the aerobic environment to form microbial activities simultaneously, enable the system that the release concentration and burst size of refuse landfill vapor phase contaminants is effectively reduced.It is applied in conventional garbage landfill structure, easy to operate, low in cost, absorption degradation effect is good, has great social benefit and economic benefit.
Description
Technical field
The present invention relates to a kind of, and the refuse landfill vapor phase contaminants based on intercal type functional layer cut down system in situ, specifically
It is related to a kind of building of refuse landfill intercal type functional layer and the cutting method in situ of foul gas, methane, belongs to environment guarantor
Protect technical field.
Background technique
The vapor phase contaminants burst size such as refuse landfill obnoxious gas, methane is big, in situ to cut down difficulty.Conventional garbage landfill
Closure cover system by it is more than junk-heap body HDPE film and coating form, in the direct of isolation rubbish and external environment
Contact, and plantation etc. of the offer Nutrition Soil for surface layer vegetation have certain effect, but for NH3、H2The foul gas such as S
With methane actively to cut down ability lower.
" for aoxidizing the system and method (102906032 A of CN) of methane " patent of Zhao Youcai, Han Dan are compared, this is specially
Benefit takes full advantage of the methane oxidation ability of mineralized waste, introduces ambient atmos by pipeline, builds aerobic environment, and by outer
Add nutrient solution to improve refuse landfill methane oxidation rate, provides a kind of suitable landfill yard methane method for oxidation；But due to needing
Nutrient solution is added, cost of material is increased, while only leaning on the natural flowing of ambient atmos, air is not easily accessible in junk-heap body
Portion, especially implementation process are exposed to surface, are easy to cause the release of stench.
In consideration of it, the application proposes more than landfill yard junk-heap body, an intercal type functional layer is constructed below covering system,
The physical and chemical adsorption and microbial action of the non-power air automatic switching system and composite material laid by this layer, to evil
Odour and methane carry out reduction in situ.
Summary of the invention
In view of the problems of the existing technology, present applicant proposes a kind of refuse landfill gas based on intercal type functional layer
Phase pollutant cuts down system in situ, and building one below coating is intended to reduction landfill yard in situ in conventional garbage landfill structure
The functional layer of the vapor phase contaminants such as stench, methane, by the compounding of functional material, so that being both provided with micro- life in intercalation functional layer
The mineralized waste of object inoculation effect, but promising microorganism provides the sludge carbon of carrier and provides the rice husk stalk of nutrient, and matches
Automatic ventilation system is set, so that the in-situ oxidation for being conducive to stench and methane is cut down.
The present invention is inserted into and fills out using mineralized waste, sludge carbon and rice straw as the intercal type functional layer of basic material
It buries between Closure cover system and junk-heap body, non-woven fabrics ventilated membrane is laid under layer, is laid with HDPE film on layer, and in layer middle berth
If after cross-perforating pipe and vertical ventilation system and blast cap, carrying out reduction in situ to vapor phase contaminants such as stench and methane, having
Effect improves the shortcomings that conventional garbage landfill yard vapor phase contaminants difficulty removal.Since the mineralized waste content of organic matter is high, microbe quantity
More, the features such as rice straw nitrogen content after sludge carbon pore structure is abundant and oxidation ammonolysis is high is measured, the mixing of composition covers
Material is to CH4Isothermal chamber gas and NH3、H2The foul gas such as S have good absorption degradation effect；It is automatic that non-power air is installed
Exchange system can promote the aerobic environment to be formed conducive to microbial activities, easy to operate, low in cost, long service life.
The purpose of the present invention is what is be achieved through the following technical solutions:
The present invention provides a kind of intercal type functional layers, including ventilative film layer, functional stuffing layer and the HDPE set gradually
Film layer is additionally provided with non-power air automatic switching system in the functional stuffing layer.
Preferably, the material of the functional stuffing layer include mass ratio be the mineralized waste of 6-8:2-4:1-3, sludge carbon and
Rice straw；
The functional stuffing layer with a thickness of 30-100cm, porosity 0.5-0.9g/cm3, particle size range 5-20mm,
Gas velocity is 0.01-0.05m/s, and ORP is -100-100mV, specific surface area 50-250m2/ g, content of organic matter 40-
50g/kg, cation exchange capacity 80-100cmol/kg, pH are in alkalinity.
Preferably, the sludge carbon is the sludge carbon after domestication；Its preparation step is as follows:
A1, by sludge under 250-650 DEG C of anaerobic or anaerobic condition, pass through anaerobism or anaerobic pyrolysis process and obtain sludge
Charcoal；The specific surface area of the sludge carbon is 50-300m2/ g, particle size 5-20mm；
Domestication culture in situ, landfill depth 30- are carried out in A2, the sludge carbon embedment mineralized waste for obtaining step A1
150cm, incubation time are 2-6 months to get the sludge carbon after domestication, and surface bacteria sum reaches 1 × 106-5×107
A/100g.
Preferably, the mineralized waste is the rubbish sieve of the stabilization or semi-stability that obtained after landfill by 8 years or more
Divide fines；The content of organic matter of the mineralized waste is 80-120g/kg, and total number of bacteria is up to 1 × 106-1×107A/g, partial size <
20mm。
Preferably, the rice straw is the rice straw through oxidation ammonolysis processing；
The processing step is as follows:
Rice straw is obtained after hydrogen peroxide and ammonium hydroxide carry out oxidation ammonolysis processing, gained treated rice straw
Full nitrogen content is 3%-5%, and fulvic acid mass fraction is 0.3%-0.6%.
Preferably, the functional stuffing layer the preparation method is as follows: the sludge carbon, mineralized waste and rice straw are pressed
Mass ratio be uniformly mixed, then form to get.
Preferably, the non-power air automatic switching system includes the perforation gas-guide tube being laterally arranged and perpendicular to perforation
More vertical gas-guide tubes of gas-guide tube, the perforation gas-guide tube are horizontally installed in functional stuffing layer, and the vertical gas-guide tube hangs down
Straight setting is on perforation gas-guide tube；The other end of the vertical gas-guide tube passes through HDPE film and extends to outside, the vertical air guide
The elongated end of pipe is provided with blast cap；
Multiple apertures are evenly arranged on the tube wall of the perforation gas-guide tube, the aperture of the aperture is 5-10mm, makes sky
In gas entered function packing layer, the aerobic environment for being conducive to microbial activities is formed.
Preferably, the caliber of the perforation gas-guide tube is 20-80mm, and the perforation gas-guide tube is more, and is arranged in parallel,
The spacing of more perforation gas-guide tubes is 20-40m, and perforation gas-guide tube both ends are communicated with atmosphere；The caliber of the vertical gas-guide tube is
20-80mm, the spacing of every more vertical gas-guide tube on gas-guide tube of perforating are 20-40m；The radius of the blast cap is 25-
40cm, the service radius of blast cap are 30-50m.
The present invention also provides a kind of, and the refuse landfill vapor phase contaminants based on intercal type functional layer cut down system in situ,
Including more than the junk-heap body of refuse landfill, Closure cover system intercal type functional layer arranged below.
Preferably, the blast cap is arranged on Closure cover system.
The present invention by mineralized waste, sludge carbon and rice straw through oxidation ammonolysis processing with certain mass ratio mixes and
At can reach good reduction effect.Wherein mineralized waste fines fertility with higher and biggish specific surface area, wherein giving birth to
There are substantial amounts, miscellaneous microorganism, are a kind of Biomedia of superior performance；Sludge carbon is rich due to its pore structure
Richness can be used as good microbe carrier；The full nitrogen of rice straw and fulvic acid content through oxidation ammonolysis processing are high, have higher
Fertility, while sufficient nutrient can be provided for the vegetative activity of microorganism.And to air is passed through below coating, can accelerate to insert
The activity of aerobic microbiological in stratotype functional layer, effectively improves the biological degradation rate of foul gas and methane.
Refuse landfill vapor phase contaminants based on intercal type functional layer of the invention cut down the working principle of system in situ
Are as follows: when the foul gas and methane that the junk-heap body of refuse landfill generates spill into intercal type functional layer, by non-power air
Automatic switching system introduce air (air is entered by the both ends of perforation gas-guide tube, then by vertical gas-guide tube to blast cap,
The air of parallel direction above Closure cover system is flowed, accelerate and is changed into from bottom to top vertical air flowing), lead to
Foul gas and methane in-situ drop in the physical and chemical adsorption and microbial action for crossing the functional stuffing layer in intercal type functional layer
Solution conversion, to reduce the burst size of vapor phase contaminants.
Compared with prior art, the invention has the following beneficial effects:
(1) mineralized waste local use is made into covering material, helps to discharge landfill yard storage capacity；Simultaneously sludge charcoal processing and
The minimizing outlet that oxidation ammonolysis rice straw has also provided for intractable municipal sludge and field straw, reached " with
It is useless control it is useless " effect.Mineralized waste has excellent physicochemical property simultaneously, and is rich in microorganism；Sludge carbon is biggish due to its
Specific surface area and porosity can be used as good microbe carrier；Rice straw nitrogen content with higher after aoxidizing ammonolysis,
Three mixes in proportion, while carrying out physical and chemical adsorption to foul gas and methane, can play each quasi-microorganism to phase
The burst size of vapor phase contaminants is effectively reduced in the degradation for answering gas.
(2) below traditional refuse landfill covering system insertion by mineralized waste, sludge carbon and rice straw compounding and
At adsorption function layer, the non-woven fabrics ventilated membrane being laid under layer can separate junk-heap body and functional stuffing layer, reduce percolate
It penetrates into；The HDPE film being laid on functional stuffing layer can further block the loss of vapor phase contaminants.Utilize the intercal type functional layer
Reduction in situ is carried out to stench and methane, preferable source reduction effect is can reach, the burst size of vapor phase contaminants is effectively reduced.
(3) non-power air automatic switching system is installed in intercal type functional layer, HDPE film following functions layer can be reinforced
Ventilation provides quasi- aerobic environment for microbial activities, improves aerobic microbiological to the degradation rate of methane and foul gas.Vertical
Blast cap is installed on gas-guide tube top, and the system is made to need not rely on the free-flowing that junk-heap body internal-external temperature difference achieves that air.
Whole process is easy to operate, low in cost, blast cap without being powered, can long time running, while it is anti-corrosion, explosion-proof, alkaline-resisting, can have
Effect realizes the air ventilation of intercal type functional layer.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 is the cuing open based on intercal type functional layer refuse landfill vapor phase contaminants original position abatement system that the present invention constructs
Face structural schematic diagram；
Fig. 2 is the bowing based on intercal type functional layer refuse landfill vapor phase contaminants original position abatement system that the present invention constructs
Depending on structural schematic diagram；
Wherein: 1-HDPE film layer；2- functional stuffing layer；3- non-woven fabrics is breathed freely film layer；4- perforation gas-guide tube；The vertical air guide of 5-
Pipe；6- blast cap；7- junk-heap body；8- Closure cover system.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, various modifications and improvements can be made.These belong to the present invention
Protection scope.
Embodiment 1, building garbage landfill yard intercalation functional layer original position deodoration system
A kind of refuse landfill vapor phase contaminants system in situ of cutting down is included in refuse landfill as depicted in figs. 1 and 2
7 or more junk-heap body, the intercal type functional layer arranged below of Closure cover system 8.The intercal type functional layer includes successively setting
The non-woven fabrics set is breathed freely film layer 3, functional stuffing layer 2 and HDPE film layer 1, is additionally provided with unpowered sky in the functional stuffing layer 2
Gas automatic switching system.
The preparation of the functional stuffing layer 2: the rubbish from old port refuse landfill landfill 8-12 or so, warp are fetched first
After substantially sieving partial size < 20mm, content of organic matter 80-120g/kg, total number of bacteria is up to 1 × 106-1×107The mine of a/g
Change rubbish；Sludge carbon is directly fired under 500 DEG C, oxygen free condition by the excess sludge from sewage plant；Then firing is obtained
Sludge carbon embedment mineralized waste bed in carry out domestication culture in situ, landfill depth 30-150cm, incubation time is 2-6
Month, so that its surface bacteria sum reaches 1 × 106-5×107A/100g, the sludge carbon after must taming；Every 5g rice straw warp
Ammonolysis 90min, rice straw after must aoxidizing ammonolysis are aoxidized by 25mL hydrogen peroxide, 15mL ammonium hydroxide, full nitrogen content is
3%-5%, fulvic acid mass fraction are 0.3%-0.6%.By the sludge carbon after mineralized waste, domestication and the rice after oxidation ammonolysis
Careless stalk is uniformly mixed into type with the mass ratio of 6:2:1 up to the functional stuffing layer, the content of organic matter in the functional stuffing layer
For 48g/kg, cation exchange capacity 86cmol/kg, porosity 0.7g/cm3, specific surface area 120m2/ g, particle size range are
5-20mm, ORP are -86mV, and pH is in alkalinity.With a thickness of 40cm.The non-power air automatic switching system includes laterally setting
Perforation gas-guide tube 4 and more vertical gas-guide tubes 5 perpendicular to perforation gas-guide tube 4, the perforation gas-guide tube 4 is horizontally installed on function
In energy packing layer 2, the vertical gas-guide tube 5 is vertically set on perforation gas-guide tube 4；The other end of the vertical gas-guide tube 5 is worn
It crosses HDPE film 1 and extends to the outside on Closure cover system 8, the elongated end of the vertical gas-guide tube 5 is provided with blast cap 6.Institute
It states and is evenly arranged with multiple apertures on the tube wall of perforation gas-guide tube 4, the aperture of the aperture is 5-10mm.
Every 25m that is separated by parallel is laid with a caliber as the perforation gas-guide tube 4 of 50mm in intercal type functional layer, and is perforating
The pore gauze for filling up gravel is wrapped up outside gas-guide tube 4, perforation 4 both ends of gas-guide tube are communicated with atmosphere.
It is connected to the vertical gas-guide tube 5 that a root canal diameter is 50mm every 30m on above-mentioned perforation gas-guide tube 4, every is vertically led
Tracheae 5 is 70cm long, and motorless blast cap 6 is installed on vertical 5 top of gas-guide tube, which is 25cm, the service radius of blast cap
For 30-50m.
With NH3、H2S、CH4Release concentration is research object, the traditional refuse landfill covering system of measurement (including non-woven fabrics
Air-permeable layer and HDPE film layer) and based on intercal type functional layer described in the present embodiment refuse landfill covering system three kinds of gases
The comparison of release concentration.NH3Measurement use sodium hypochlorite-salicylic acid spectrophotometry (HJ 534-2009), H2The measurement of S is adopted
With sub-methyl blue spectrum analysis (GB 11742-89), CH4Measurement use gas chromatography.Work as NH3Inlet gas concentration be
3.0-5.0mg/m3,H2The inlet gas concentration of S is 1.0-2.0mg/m3,CH4Inlet gas concentration be 10-20% when, system run 2 weeks,
Test result shows NH of the covering system using intercal type functional layer than traditional covering system3、H2S、CH4Three kinds of gas is released
Putting concentration respectively reduces 80.5%, 74.3% and 75.2%.
Embodiment 2, building garbage landfill yard intercalation functional layer original position deodoration system
A kind of refuse landfill vapor phase contaminants cut down system in situ, including more than the junk-heap body of refuse landfill,
Closure cover system intercal type functional layer arranged below.The intercal type functional layer includes the non-woven fabrics ventilated membrane set gradually
Layer, functional stuffing layer and HDPE film layer are additionally provided with non-power air automatic switching system in the functional stuffing layer.
The preparation of the functional stuffing layer: the rubbish from old port refuse landfill landfill 8-12 or so, warp are fetched first
Its partial size < 20mm, content of organic matter 80-120g/kg after substantially sieving, total number of bacteria is up to 1 × 106-1×107The mine of a/g
Change rubbish；Sludge carbon is directly fired under 400 DEG C, oxygen free condition by the excess sludge from sewage plant；Then firing is obtained
Sludge carbon embedment mineralized waste bed in carry out domestication culture in situ, landfill depth 30-150cm, incubation time is 2-6
Month, so that its surface bacteria sum reaches 1 × 106-5×107A/100g, the sludge carbon after must taming；Every 5g rice straw warp
Ammonolysis 120min, rice straw after must aoxidizing ammonolysis are aoxidized by 20mL hydrogen peroxide, 10mL ammonium hydroxide, full nitrogen content is
3%-5%, fulvic acid mass fraction are 0.3%-0.6%.By the sludge carbon after mineralized waste, domestication and the rice after oxidation ammonolysis
Careless stalk is uniformly mixed into type with the mass ratio of 7:3:2 up to the functional stuffing layer, which is
50g/kg, cation exchange capacity 80cmol/kg, porosity 0.8g/cm3, specific surface area 160m2/ g, particle size range 5-
20mm, ORP 11mV, pH are in alkalinity.With a thickness of 50cm.The non-power air automatic switching system includes wearing of being laterally arranged
Hole gas-guide tube and more vertical gas-guide tubes perpendicular to perforation gas-guide tube, the perforation gas-guide tube is horizontally installed on functional stuffing layer
In, the vertical gas-guide tube is vertically set on perforation gas-guide tube；The other end of the vertical gas-guide tube extends across HDPE film
The elongated end of outside to Closure cover system, the vertical gas-guide tube is provided with blast cap.The pipe of the perforation gas-guide tube
Multiple apertures are evenly arranged on wall, the aperture of the aperture is 5-10mm.
Every 30m that is separated by parallel is laid with a caliber as the perforation gas-guide tube of 60mm in intercal type functional layer, and is perforating
The pore gauze for filling up gravel is wrapped up outside gas-guide tube, perforation gas-guide tube both ends are communicated with atmosphere.
The vertical gas-guide tube that a root canal diameter is 60mm, every vertical air guide are connected to every 30m on above-mentioned perforation gas-guide tube
Motorless blast cap is installed on pipe range 75cm, vertical gas-guide tube top, which is 30cm, and the service radius of blast cap is 30-
50m。
With NH3、H2S、CH4Release concentration is research object, the traditional refuse landfill covering system of measurement measurement (including nothing
Woven fabric air-permeable layer and HDPE film layer) and refuse landfill covering three kinds of system based on intercal type functional layer described in the present embodiment
The comparison of gas release concentration.NH3Measurement use sodium hypochlorite-salicylic acid spectrophotometry (HJ 534-2009), H2The survey of S
Surely sub-methyl blue spectrum analysis (GB 11742-89) is used, CH4Measurement use gas chromatography.Work as NH3Inlet gas concentration
For 2.2-4.5mg/m3,H2The inlet gas concentration of S is 2.5-3.8mg/m3,CH4Inlet gas concentration be 15-30% when, system operation 30
It, test result shows using the covering system of intercal type functional layer than traditional covering system NH3、H2S、CH4Three kinds of gas
Release concentration reduces 84.3%, 80.1% and 76.2% respectively.
Embodiment 3, building garbage landfill yard intercalation functional layer original position deodoration system
A kind of refuse landfill vapor phase contaminants cut down system in situ, including more than the junk-heap body of refuse landfill,
Closure cover system intercal type functional layer arranged below.The intercal type functional layer includes the non-woven fabrics ventilated membrane set gradually
Layer, functional stuffing layer and HDPE film layer are additionally provided with non-power air automatic switching system in the functional stuffing layer.
The preparation of the functional stuffing layer: the rubbish from old port refuse landfill landfill 8-12 or so, warp are fetched first
Its partial size < 20mm, content of organic matter 80-120g/kg after substantially sieving, total number of bacteria is up to 1 × 106-1×107The mine of a/g
Change rubbish；Sludge carbon is directly fired under 300 DEG C, oxygen free condition by the excess sludge from sewage plant；Then firing is obtained
Sludge carbon embedment mineralized waste bed in carry out domestication culture in situ, landfill depth 30-150cm, incubation time is 2-6
Month, so that its surface bacteria sum reaches 1 × 106-5×107A/100g, the sludge carbon after must taming；Every 5g rice straw warp
Ammonolysis 150min, rice straw after must aoxidizing ammonolysis are aoxidized by 15mL hydrogen peroxide, 25mL ammonium hydroxide, full nitrogen content is
3%-5%, fulvic acid mass fraction are 0.3%-0.6%.By mineralized waste, sludge carbon and rice straw with the quality of 8:4:3
Than being uniformly mixed into composite cover material, the material content of organic matter be 46g/kg, cation exchange capacity 85cmol/kg,
Porosity is 0.6g/cm3, specific surface area 135m2/ g, particle size range 5-20mm, ORP 23mV, pH are in alkalinity.With a thickness of
50cm。
The non-power air automatic switching system include the perforation gas-guide tube being laterally arranged and perpendicular to perforation gas-guide tube
More vertical gas-guide tubes, the perforation gas-guide tube is horizontally installed in functional stuffing layer, and the vertical gas-guide tube is vertically arranged
On perforation gas-guide tube；The other end of the vertical gas-guide tube passes through HDPE film and extends to the outside on Closure cover system,
The elongated end of the vertical gas-guide tube is provided with blast cap.Multiple apertures, institute are evenly arranged on the tube wall of the perforation gas-guide tube
The aperture for stating aperture is 5-10mm.
Every 35m that is separated by parallel is laid with a caliber as the perforation gas-guide tube of 50mm in intercal type functional layer, and is perforating
The pore gauze for filling up gravel is wrapped up outside gas-guide tube, perforation gas-guide tube both ends are communicated with atmosphere.
The vertical gas-guide tube that a root canal diameter is 50mm, every vertical air guide are connected to every 35m on above-mentioned perforation gas-guide tube
Motorless blast cap is installed on pipe range 80cm, vertical gas-guide tube top, which is 35cm, and the service radius of blast cap is 30-
50m。
With NH3、H2S、CH4Release concentration is research object, the traditional refuse landfill covering system of measurement measurement (including nothing
Woven fabric air-permeable layer and HDPE film layer) and refuse landfill covering three kinds of system based on intercal type functional layer described in the present embodiment
The comparison of gas release concentration.NH3Measurement use sodium hypochlorite-salicylic acid spectrophotometry (HJ 534-2009), H2The survey of S
Surely sub-methyl blue spectrum analysis (GB 11742-89) is used, CH4Measurement use gas chromatography.Work as NH3Inlet gas concentration
For 3.2-4.6mg/m3,H2The inlet gas concentration of S is 1.5-2.7mg/m3,CH4Inlet gas concentration be 20-25% when, system operation 60
It, using intercal type functional layer covering system than traditional covering system NH3、H2S、CH4The release concentration of three kinds of gases reduces respectively
88.4%, 90.3% and 82.0%.
Comparative example 1
This comparative example provides a kind of refuse landfill vapor phase contaminants original position reduction system, the system base with embodiment 1
This is identical, the difference is that only: in the functional stuffing layer preparation of this comparative example, sludge carbon is without domestication culture in situ.I.e.
Using the sludge carbon without domestication.
With NH3、H2S、CH4Release concentration is research object, and in situ using this comparative example 1 cuts down three kinds of gas of system measurement
Body release concentration, method are same as Example 1.Test result shows using the reduction system in situ of embodiment 1 compared to this comparison
The NH of the reduction system in situ of example3、H2S、CH4The release concentration of three kinds of gas reduces 42.3%, 56.8%, 37.1% respectively.
Comparative example 2
This comparative example provides a kind of refuse landfill vapor phase contaminants original position reduction system, the system base with embodiment 1
This is identical, the difference is that only: in the functional stuffing layer preparation of this comparative example, rice straw is without oxidation ammonolysis processing.
I.e. using the rice straw of not oxidised ammonolysis.
With NH3、H2S、CH4Release concentration is research object, and in situ using this comparative example 1 cuts down three kinds of gas of system measurement
Body release concentration, method are same as Example 1.Test result shows using the reduction system in situ of embodiment 1 compared to this comparison
The NH of the reduction system in situ of example3、H2S、CH4The release concentration of three kinds of gas reduces 22.3%, 24.8%, 17.4% respectively.
Comparative example 3
This comparative example provides a kind of refuse landfill vapor phase contaminants original position reduction system, the system base with embodiment 1
This is identical, the difference is that only: in the functional stuffing layer preparation of this comparative example, the mineralized waste used is partial size < 50mm.
With NH3、H2S、CH4Release concentration is research object, and in situ using this comparative example 1 cuts down three kinds of gas of system measurement
Body release concentration, method are same as Example 1.Test result shows using the reduction system in situ of embodiment 1 compared to this comparison
The NH of the reduction system in situ of example3、H2S、CH4The release concentration of three kinds of gas reduces 53.2%, 52.9%, 47.1% respectively.
Comparative example 4
This comparative example provides a kind of refuse landfill vapor phase contaminants original position reduction system, the system base with embodiment 1
This is identical, the difference is that only: in the functional stuffing layer preparation of this comparative example, mineralized waste, sludge carbon and the straw of use
The mass ratio of stalk is 6:1:2.
With NH3、H2S、CH4Release concentration is research object, and in situ using this comparative example 1 cuts down three kinds of gas of system measurement
Body release concentration, method are same as Example 1.Test result shows using the reduction system in situ of embodiment 1 compared to this comparison
The NH of the reduction system in situ of example3、H2S、CH4The release concentration of three kinds of gas reduces 35.4%, 37.2%, 42.0% respectively.
Comparative example 5
This comparative example provides a kind of refuse landfill vapor phase contaminants original position reduction system, the system base with embodiment 1
This is identical, the difference is that only: in the functional stuffing layer preparation of this comparative example, mineralized waste, sludge carbon and the straw of use
The mass ratio of stalk is 5:2:2.
With NH3、H2S、CH4Release concentration is research object, and in situ using this comparative example 1 cuts down three kinds of gas of system measurement
Body release concentration, method are same as Example 1.Test result shows using the reduction system in situ of embodiment 1 compared to this comparison
The NH of the reduction system in situ of example3、H2S、CH4The release concentration of three kinds of gas reduces 31.6%, 28.7%, 28.1% respectively.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of intercal type functional layer, which is characterized in that including ventilative film layer, functional stuffing layer and the HDPE film set gradually
Layer, non-power air automatic switching system is additionally provided in the functional stuffing layer.
2. intercal type functional layer according to claim 1, which is characterized in that the material of the functional stuffing layer includes quality
Than the mineralized waste, sludge carbon and rice straw for 6-8:2-4:1-3；
The functional stuffing layer with a thickness of 30-100cm, porosity 0.5-0.9g/cm3, particle size range 5-20mm, ORP
For -100-100mV, specific surface area 50-250m2/ g, content of organic matter 40-50g/kg, cation exchange capacity 80-
100cmol/kg, pH are in alkalinity.
3. intercal type functional layer according to claim 2, which is characterized in that the sludge carbon is the sludge after domestication
Charcoal；Its preparation step is as follows:
A1, by sludge under 250-650 DEG C of anaerobic or anaerobic condition, pass through anaerobism or anaerobic pyrolysis process and obtain sludge carbon；
The specific surface area of the sludge carbon is 50-300m2/ g, particle size 5-20mm；
It carries out domestication in situ in A2, the sludge carbon embedment mineralized waste for obtaining step A1 to cultivate, landfill depth 30-150cm,
Incubation time is 2-6 months to get the sludge carbon after domestication, and surface bacteria sum reaches 1 × 106-5×107A/
100g。
4. intercal type functional layer according to claim 2 or 3, which is characterized in that the mineralized waste be by 8 years or with
The sieving garbage fines of the stabilization or semi-stability that are obtained after upper landfill；The content of organic matter of the mineralized waste is 80-120g/
Kg, total number of bacteria is up to 1 × 106-1×107A/g, partial size < 20mm.
5. intercal type functional layer according to claim 2, which is characterized in that the rice straw is through oxidation ammonolysis processing
Rice straw；
The processing step is as follows:
Rice straw is obtained after hydrogen peroxide and ammonium hydroxide carry out oxidation ammonolysis processing, the full nitrogen of gained treated rice straw
Mass fraction is 3%-5%, and fulvic acid mass fraction is 0.3%-0.6%.
6. intercal type functional layer according to claim 2, which is characterized in that the preparation method of the functional stuffing layer is such as
Under: by the sludge carbon, mineralized waste and rice straw in mass ratio be uniformly mixed, then form to get.
7. intercal type functional layer according to claim 1, which is characterized in that the non-power air automatic switching system packet
The perforation gas-guide tube being laterally arranged and the more vertical gas-guide tubes perpendicular to perforation gas-guide tube are included, the perforation gas-guide tube is laterally set
It sets in functional stuffing layer, the vertical gas-guide tube is vertically set on perforation gas-guide tube；The other end of the vertical gas-guide tube
Outside is extended to across HDPE film, the elongated end of the vertical gas-guide tube is provided with blast cap；
Multiple apertures are evenly arranged on the tube wall of the perforation gas-guide tube, the aperture of the aperture is 5-10mm.
8. intercal type functional layer according to claim 7, which is characterized in that the caliber of the perforation gas-guide tube is 20-
80mm, the perforation gas-guide tube is more, and is arranged in parallel, and the spacing of more perforation gas-guide tubes is 20-40m, gas-guide tube of perforating
Both ends are communicated with atmosphere；The caliber of the vertical gas-guide tube is 20-80mm, more vertical gas-guide tubes on every perforation gas-guide tube
Spacing be 20-40m；The radius of the blast cap is 25-40cm.
9. a kind of refuse landfill vapor phase contaminants based on intercal type functional layer described in claim 1 cut down system in situ,
It is characterised in that it includes more than the junk-heap body of refuse landfill, Closure cover system intercal type functional layer arranged below.
10. the refuse landfill vapor phase contaminants of intercal type functional layer according to claim 9 cut down system in situ, special
Sign is that the blast cap is arranged on Closure cover system.
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