CN105293703A - Multifunctional combined packing of novel aeration floating island for eutrophic water body in-situ remediation - Google Patents

Multifunctional combined packing of novel aeration floating island for eutrophic water body in-situ remediation Download PDF

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CN105293703A
CN105293703A CN201510868422.5A CN201510868422A CN105293703A CN 105293703 A CN105293703 A CN 105293703A CN 201510868422 A CN201510868422 A CN 201510868422A CN 105293703 A CN105293703 A CN 105293703A
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filler
space
chinampa
packing
accounts
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CN201510868422.5A
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CN105293703B (en
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朱洪涛
常玉龙
孙德智
张立秋
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北京林业大学
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Abstract

The invention discloses multifunctional combined packing of a novel aeration floating island for eutrophic water body in-situ remediation, and the functions of pollutant interception, adsorption and eutrophication as well as biological membrane purification are achieved, so that the purification efficiency is greatly improved. The novel combined packing comprises an outer shell body and an interior filling material. The outer shell body is prepared by adopting polyethylene or polypropylene, is in a hollow cubic shape with six hollow surfaces, and comprises a main body and two net covers. An inner cavity of the plastic shell body is divided into an upper space and a lower space by a movable plastic net, wherein the lower space is filled with a particle inorganic filter material, and the upper space is filled with a particle organic filler playing the role of a biofilm carrier and a hollow float ball playing a role of floating. Stacking and blocking of the packing are avoided, the water passing rate is high, the organic filler is combined with the inorganic filter material, different inorganic fillers of different formulas are adopted in different environments, the microbial activity and purifying capacity are improved, moreover, the packing adopts a dispersed and hidden type floating body, so that the floating island is convenient to manage, flexible to use and attractive in appearance.

Description

A kind of multifunctional combination filler for the novel aeration chinampa of eutrophication water in-situ immobilization
Technical field
The present invention relates to the granule type multifunctional combination filler of a kind of organic filler and inorganic filtrate, in the water purification technology for novel aerating filling chinampa, belong to restoration of the ecosystem field.
Background technology
Along with a large amount of nitrogen phosphorus enters water body, cause the eutrophication of water field of big area, have a strong impact on the life of expanding economy and resident.For the water body of eutrophication, every country and area adopt different physics, chemistry, biological method to administer, and have repaired the water body of eutrophication to a certain extent.A large amount of practices and research show, ecological restoring method obtains the general accreditation of researchist.Artificial floating island is as the one in water body in-situ recovery technique, and other the bioremediation technology of comparing has significant advantage.Chinampa utilizes the cleaning action of the sorption of plant and microorganism to repair water body environment, has good cleaning action to eutrophication water quality; Applying flexible, is applicable to various water body, and can make various size, is convenient to transport; Water environment can also be beautified in chinampa, so floating island technique is more and more subject to people's attention.
Along with the development of floating island technique, researchist finds some shortcomings on traditional chinampa, and the seasonality as plant type chinampa is obvious, and the pollutent in water body is removed in the main harvesting by plant, not manageability, and the plant of harvesting becomes solid refuse more, is difficult to process.In order to address this problem, researchist have developed novel aerating filling chinampa, and this kind of chinampa mainly relies on the biomembrane purification of filler, do not rely on plant, convenient management, and combine absorption interception function, enhanced aeration, and the technology such as plug-flow, effectively raise the decontamination effect improving on chinampa.
Filler at present for floating island technique mainly contains two classes, one class is organic filler, comprises fibrous bundle filler (soft, half soft and compounded mix) and granule type floating stuffing (annular packing, column filler, polyhedron empty ball homogeneous filler, built-in filler and porous rotate ball-shaped filling material); The another kind of mineral filler being mainly light granules type, such as slag, zeolite etc.The filler of comparative particle's type, easily there is conglomeration, latch up phenomenon after using for some time in fiber bundle-like filler, greatly reduces the available specific surface area of filler, affect its decontamination effect improving.
In order to improve soil removability, researchist has done large quantifier elimination and innovation to filler, constantly breaks through in the direction of improving filler.Mineral filler has good absorption property, can tackle the pollutent in water, and researchist, by being used in chinampa after some light-weight inorganic modification of filtration medium, achieves certain decontamination effect improving.Thank to the floating stuffing that the human hairs such as long blood understand a kind of microbial film process, formed by volcanic rock powder, rubber powder and tackiness agent processing and manufacturing, be applicable to the Absorption Growth of microorganism, be easy to fluidisation, improve processing efficiency (application number 200910077129.1).The human hairs such as Wen Baozhong understand a kind of active composite biological packing, porous support is formed by carrier base material and functional auxiliary material, the active powder material layer of one deck porous that through hole spherosome outside surface bonds, improve the absorption property of filler preferably, enhance the processing efficiency (application number 201210040598.8) of COD and ammonia nitrogen.The human hairs such as Lu Shaoming understand a kind of Suspension ceramsite filter material, adopt shale through fragmentation, powder process, fire, screen after obtain floating haydite, effectively raise specific surface area and physical strength, be applicable to the process (application number 201310239044.5) of micro polluted source.Although this kind of filler is through modification, its essence is still mineral filler, does not fundamentally change the shortcoming of carrier surface forming biofilm property difference and adsorbs the shortcoming of saturated rear forfeiture detergent power.
In order to overcome the shortcoming of mineral filler, maintain the stability of filler detergent power, researchist has done large quantity research to organic particulate filler as floating stuffing.Han Hongjun has invented a kind of floating stuffing for sewage disposal, adopts soft or half soft corrosion resistant material to make different shape, and arranges vertical fin on surface, effectively add the specific surface area (application number 200410013528.9) of filler.The human hairs such as wangkai understand a kind of suspension water treatment filler, and its spirane structure significantly improves the effective surface area of filler, and not easily causes toxicity bioassay, have excellent water treatmenting performance (application number 201010511103.6).This kind of filler mainly through changing shape, structure to increase specific surface area, and then increases microbial biomass, but its specific surface area amplification is limited, so effect is unsatisfactory.The human hairs such as Zhourong is rich understand a kind of Wedge and plug-in combined suspending filling material, comprise the various weighting materials of outer field plastic casing and inner attached microbial, by the specific surface area (application 200610117939.1) effectively utilizing space to further increase filler.The human hairs such as Wuchuan understand a kind of high-efficiency hollow grid shaped spherical suspending filling material, globosity is wound around soft coarse fiber yarn, not only increase the specific surface area of filler, and fiber yarn conglomeration can not be caused and cause waste (application number 200810200621.9).This kind of filler is intended to increase specific surface area by a larger margin, but still does not fundamentally change the inertia of filler itself and increase biomembrane activity.
In order to strengthen the detergent power of filler further, researchist have also been made relevant research from the angle of organic filler modification.The human hairs such as Tian Shuanhong understand a kind of suspended biological filler of porous surface, be coated on polyolefins plastic skeleton by bonding for porous polymer materials, add the hydraulic characteristic of filler, effectively can retain the active sludge of inoculation, promote increment and the metabolism (application number 201010154425.X) of microorganism.The human hairs such as Wang Xiaojun understand the plastic filler that a kind of concrete improves, and attached to a layer concrete at frosting, improve the wetting ability of frosting, effectively can improve biofilm speed and the biofilm intensity of microorganism in water treatment system.This kind of filler overcomes the inertia of filler self to a certain extent by modification, but its coat can reduce the specific surface area of filler originally on the contrary, causes the waste of material, and its production process is complicated, and larger undoubtedly adds cost, is difficult to promote.In order to overcome this shortcoming, the people such as Sui Jun carry out modification from the angle changing material composition to filler, have invented a kind of active filler, promote microbial growth by adding biodegradable material (as starch etc.).But the flying power of this kind of filler is poor, be difficult to the growth supporting excess microorganisms after organic substance decomposing is complete, and can pathogenic micro-organism be grown, and the firmness of the hole stayed on filler also there is impact.The human hairs such as Zhang Peng understand a kind of suspended biological filler, add the wetting ability that magnetic, zeolite powder etc. improve filler, increase microbial film adsorption strength in high density polyethylene(HDPE).But due to making method, the functional component of this kind of filler is wrapped in the inside of plastic material more, and functional component add-on is few, plays a role faint, more can cause the waste of material.
In sum, can only biofilm biomass be improved to the change of organic filler shape, structure, fundamentally not solve the inertia of filler self.And though the modification of organic filler and mineral filler is improve to a certain extent to the biofilm speed of filler, biofilm intensity etc., the composition added is difficult to play good effect, and effect is unsatisfactory, and mostly makes complexity.
Applicant's research in earlier stage shows, a large amount of pollutent can be adsorbed to packing area by the absorption property of mineral filler, the pollutent of high density can stimulate the mass transfer to microbial film inside, make microbial film thicker, and the combination of organic and inorganic particle can utilize space better, not only can improve biomembranous activity, and can promote biomembranous growth, increase the biofilm biomass of unit volume filler, promote that filler is to the purification of water quality.In addition, mineral filler and organic filler all will cause secondary to endanger to ecotope.So, be a kind of mode that cost performance is higher by the direct combination of organic filler and inorganic filler particle.Scientific research personnel has done large quantifier elimination to this.
The human hairs such as Zhourong is rich understand a kind of functional suspended stuffing, and main body is the compound wing plate that plastic plate grips particle material for water treatment and makes, and by the combination of filler, microorganism are more easily adhered on it and breed (application number 03115913.3).But because its special structure makes the utilization ratio in space lower, the density of microorganism is not high, and detergent power of increasing water quality is limited.The human hairs such as Tian Binghui understand a kind of two rooms suspended biological carrier, more than general carrier different environment, by regulating solid support material, design vector chamber structures etc. form the chamber of different purification functions, improve the efficiency (application number 201110102088.4) of biological treatment.But this kind of filler is difficult to the water quality of reply different parameters and forms two room environmental, such as, when processing the sewage of different dissolved oxygen concentration, need the aerobic-anoxic environment that the size guarantee of redesign carrier and each chamber is different, there are higher specific aim, specificity, are difficult to promote on a large scale.Pan Yongzhang has invented a kind of microorganism suspended carrier of water treatment, float stone is loaded (application number 200610132379.7) in the baton round housing of surperficial perforate, the coarse surface of carrier is applicable to attached growth of microorganisms, substantially increases the removal efficiency of water pollutant.But its weighting material density is less, make by this kind of applying filler when the aeration chinampa, the microbial film of inner face can come off in a large number due to shock, reduce the effective specific surface area of filler, and its filling ratio of 40% has increased the weight of this phenomenon especially.
Granule type organic filler and mineral filler are due to its stable performance, and not easily cause secondary pollution, need periodical reaping unlike hover, the life-span is longer, have now been widely used in floating island technique.But the existing floating stuffing that can be used for chinampa, decontamination effect improving is unsatisfactory, and adopts particle combined stuffing to be easy to layering, reduces water and crosses gas rate.So for chinampa filler, in raising detergent power, reducing the aspect such as management difficulty still needs development and perfect.
Summary of the invention
The object of the invention is to overcome in the development trend of existing floating island technique, more and more focus on the conbined usage of the various effects such as biomembrane purification, enhanced aeration, interception absorption, plant absorption to improve the detergent power on chinampa, but the effect that existing floating stuffing is applied to this kind of novel aerating filling chinampa is not ideal enough.And multifunctional combination applying filler provided by the invention is in floating island technique, is all improved in detergent power, management difficulty, chinampa flexibility ratio, air water mass transfer etc., the development of packing type floating island technique can be promoted.
Technical solution of the present invention is to provide a kind of multifunctional combination filler with following structure, and overall configuration belongs to the one of granule type filler, comprises outer layer plastic housing and inner fill.
Described outer casing is that the material such as high-strength polyethylene or polypropylene is made, and comprises main body and square two portions.Main body is the hollow square of the uncovered up and down bodily form of the length of side 8 ~ 10cm, and there is the plastic wire of one deck activity centre, and thickness is 1 ~ 1.5mm.Square and main body supporting, can main body be buckled in.Six faces of the outer casing that snapping is good are netted hollow out, its gap width depending on the intensity needed for the size of inner loaded particles and filler.The inner chamber of outer casing is divided into the two portions differed in size by plastic wire.
Described inside fill fills in two spaces respectively, and wherein granule type mineral filler fills in less space, and hollow float ball and particle organic filler fill in larger space.
The raw material of described granule type mineral filler is: zeolite, slag, haydite, cement and whipping agent.The weight percent of its each component is: zeolite accounts for 30% ~ 40%, and slag accounts for 15% ~ 20%, and haydite accounts for 20% ~ 30%, and cement accounts for 5% ~ 10%, and whipping agent accounts for 1%.This filler is ball-type or ellipsoidal particle.
The preparation method of described granule type mineral filler is as follows:
Macrobead zeolite, slag, haydite are sieved after fragmentation, makes its particle diameter be not more than 80 orders; Zeolite, slag, haydite and whipping agent after sieving are mixed according to a certain percentage, and the stirring that adds water is agglomerating; The slurry be stirred is made the ball-type that particle diameter is about 10-15mm or ellipsoidal particle; By air-dry under field conditions (factors) for the filler after making.
The mean density of described multifunctional combination filler is: aerobic condition is 1.2g/cm 3, anoxia condition is 1.0g/cm 3, according to the loading level adjustment density of plastic casing, organic filler and mineral filler, each filler has the combined system of a mineral filler and organic filler of one's own.
Described hollow float ball is the bead that polyethylene or polypropylene material are made, and diameter is 3 ~ 5cm, fills in a space of outer casing, under the effect of current or aeration, do irregular movement in space.
Compared with prior art, the present invention has the following advantages:
Multifunctional combination filler of the present invention adopts mineral filler and organic filler to combine, utilize the feature that the adsorptive power of mineral filler is good, pollutent is adsorbed in packing area, thus improve the rate of film build on organic filler surface, increase microorganism active, effectively raise the purification efficiency of filler.
This filler adopts loading type, and queueing discipline, take full advantage of space, improve the density of microorganism, also have certain effect to the decontamination effect improving improving chinampa.
In combined stuffing of the present invention, its special type of feed makes inorganic filler portion fix, and avoids under the condition of current and aeration, collision housing and cause the biofilm detachment of case inside.Hollow float ball in another space then becomes fluidised form with particle organic filler, effectively raises the disturbance of water body in packing area, improves coefficient of oxygen utilization, promotes that pollutent is to the mass transfer in microbial film.
In packing type chinampa, general packing area is as a whole, though its various types of filler can fully mix in an installation, but likely can the layering gradually due to the difference of density in the process of aeration, lose the meaning of combined stuffing, and heavier inorganic particle declines gradually, become closeer mineral filler layer, also can hinder aeration to a certain extent.And combined stuffing of the present invention, the equal self-organizing system of each filler, avoids filler layering, makes biofilm even.
By regulating ratio that is organic and mineral filler under combined stuffing aerobic-anoxic condition of the present invention, making it reach optimum proportioning, can further improve the denitrification effect on chinampa.
Combined stuffing of the present invention adopts concealed buoyancy aid, and in a chamber, namely fill hollow plastic ball make filler self floating or provide extra buoyancy, make chinampa not need peripheral hardware buoyancy aid, moulding is more attractive in appearance.
Accompanying drawing explanation
Fig. 1 is the plastic case structure schematic diagram of multifunctional combination filler of the present invention.
Fig. 2 is the sectional side elevation of multifunctional combination filler front view of the present invention.
Fig. 3 is the sectional view of multifunctional combination filler hollow float ball of the present invention.
Embodiment
By reference to the accompanying drawings multifunctional combination filler of the present invention is described further.As depicted in figs. 1 and 2, combined stuffing of the present invention comprises outer casing 1, be arranged at the plastic wire 2 of one deck activity of appropriate position in housing, the inner chamber of housing is divided into upper and lower two spaces, place by plastic wire, for organic filler charge space 3 and mineral filler charge space 4, load hollow float ball 6 respectively, particle organic filler 7 and particulate inorganic filler 5.
Wherein, outer casing 1 is made for high-strength polyethylene or polypropylene material, for the length of side is the cube shaped of 8 ~ 10cm, the combined stuffing of different size can be made depending on particular case, wall thickness is about 1 ~ 1.5mm, the wide 3mm of grid bar, if the intensity of application water body to combined stuffing is higher, can suitably adjust, the between centers of adjacent two net bars is no more than 1cm.The plastic wire 2 of layer activity is had in the inner chamber of outer casing 1, thickness 1mm, because its requirement of strength is lower, its net bar width can suitably reduce, inner chamber is divided into upper and lower two spaces, place by plastic wire 2, superposed space is comparatively large, and be organic filler charge space 3, the space being positioned at bottom is less, for mineral filler space 4, the volume in two spaces is determined to load the density of filler 5, and the mean density of final control combination filler is, is 1.2g/cm under aerobic condition 3left and right is 1.0g/cm under anoxia condition 3left and right.The filler 5 of filling is the granular filler made by described formula, and particle diameter is 1 ~ 1.5cm.Arrange a float 6 in organic filler space 3, be polyethylene or polypropylene hollow bead, diameter is 3 ~ 5cm, can do irregular movement under the effect of current and aeration, aqueous vapor disturbance in strengthening packing area.
By this kind of multifunctional combination applying filler when the novel aeration chinampa, first mineral filler and hollow plastic ball are loaded in two chambeies of housing, then by upper and lower two grid snappings, load in the filler sfgd. on chinampa.

Claims (7)

1. for the multifunctional combination filler on the novel aeration chinampa of eutrophication water in-situ immobilization, it is characterized in that: comprise outer casing and inside stuffing, wherein the inner chamber of outer casing is separated into upper and lower two spaces, place by the plastic wire of activity.
2. a kind of multifunctional combination filler for the novel aeration chinampa of eutrophication water in-situ immobilization according to claim 1, it is characterized in that: described outer casing is made up of main body and square, all adopt the material such as polyethylene or polypropylene to make, body shape is the square having plastics filter in upper and lower uncovered.Square be can snapping latticed, be buckled in main body after having loaded.All there is hollow out in six faces of combined stuffing, and the width in its gap, depending on the intensity needed for the particle diameter of inner fill and filler, is of a size of 8 ~ 10cm.
3. a kind of multifunctional combination filler for the novel aeration chinampa of eutrophication water in-situ immobilization according to claim 1, it is characterized in that: described weighting material fills in two spaces of housing cavity, load hollow float ball, particle organic filler and Particulate inorganic filtrate respectively.
4. inorganic filtrate according to claim 2, is characterized in that: form by following weight percent primarily of zeolite, slag, haydite, cement and whipping agent:
Zeolite accounts for 30% ~ 40%, and slag accounts for 15% ~ 20%, and haydite accounts for 20% ~ 30%, and cement accounts for 5% ~ 10%, and whipping agent accounts for 1%.
5. inorganic filtrate according to claim 2, is characterized in that: making method is as follows,
Above-mentioned filler is broken into pieces and sieves, be not more than 80 orders.After sieving, zeolite, slag, haydite, cement and whipping agent mix according to a certain percentage, and the stirring that adds water is agglomerating; The slurry be stirred is made the ball-type that particle diameter is 10 ~ 15mm or ellipsoidal particle, by air-dry under field conditions (factors) for the filler made.
6. a kind of multifunctional combination filler for the novel aeration chinampa of eutrophication water in-situ immobilization according to claim 1, is characterized in that: described combined stuffing mean density is respectively, 1.2g/cm3 under aerobic condition; 1.0g/cm3 under anoxia condition.According to the Mass adjust-ment mean density of plastic casing and filler to make ratio optimum.
7. hollow float ball according to claim 3, is characterized in that: for polyethylene or polypropylene material are made, and the bead of diameter 3 ~ 5cm, fills in the upper part of inner chamber, under the disturbance of current and aeration, do irregular movement.
CN201510868422.5A 2015-12-03 2015-12-03 A kind of multifunctional combination filler for the novel aeration chinampa of eutrophication water in-situ immobilization Active CN105293703B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109133498A (en) * 2018-08-09 2019-01-04 苏州金螳螂园林绿化景观有限公司 Greenbelt rainwater bend intercepts pollution reducing device

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