CN114573111A - Filler for removing antibiotics, constructed wetland system and method thereof - Google Patents
Filler for removing antibiotics, constructed wetland system and method thereof Download PDFInfo
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- CN114573111A CN114573111A CN202111631443.7A CN202111631443A CN114573111A CN 114573111 A CN114573111 A CN 114573111A CN 202111631443 A CN202111631443 A CN 202111631443A CN 114573111 A CN114573111 A CN 114573111A
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- 239000000945 filler Substances 0.000 title claims abstract description 65
- 239000003242 anti bacterial agent Substances 0.000 title claims abstract description 48
- 229940088710 antibiotic agent Drugs 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000010865 sewage Substances 0.000 claims abstract description 45
- 239000002028 Biomass Substances 0.000 claims abstract description 37
- 239000003610 charcoal Substances 0.000 claims abstract description 35
- 230000003115 biocidal effect Effects 0.000 claims abstract description 12
- 241000196324 Embryophyta Species 0.000 claims description 41
- 238000011282 treatment Methods 0.000 claims description 26
- 239000010802 sludge Substances 0.000 claims description 25
- 230000014759 maintenance of location Effects 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000005484 gravity Effects 0.000 claims description 10
- 239000008399 tap water Substances 0.000 claims description 10
- 235000020679 tap water Nutrition 0.000 claims description 10
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- 244000082204 Phyllostachys viridis Species 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- 239000011425 bamboo Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 5
- 238000012163 sequencing technique Methods 0.000 claims description 5
- 235000014676 Phragmites communis Nutrition 0.000 claims description 4
- 238000012856 packing Methods 0.000 claims description 4
- 235000005273 Canna coccinea Nutrition 0.000 claims description 3
- 240000001398 Typha domingensis Species 0.000 claims description 3
- 238000007865 diluting Methods 0.000 claims description 2
- 210000000554 iris Anatomy 0.000 claims 2
- 240000008555 Canna flaccida Species 0.000 claims 1
- 244000025254 Cannabis sativa Species 0.000 claims 1
- 210000003165 abomasum Anatomy 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000005067 remediation Methods 0.000 abstract description 2
- 239000003344 environmental pollutant Substances 0.000 description 12
- 231100000719 pollutant Toxicity 0.000 description 11
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 10
- 229960005404 sulfamethoxazole Drugs 0.000 description 10
- JLKIGFTWXXRPMT-UHFFFAOYSA-N sulphamethoxazole Chemical compound O1C(C)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 JLKIGFTWXXRPMT-UHFFFAOYSA-N 0.000 description 10
- 238000002156 mixing Methods 0.000 description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 244000292211 Canna coccinea Species 0.000 description 2
- 241001633663 Iris pseudacorus Species 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 229940079593 drug Drugs 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- 241000931336 Chloris truncata Species 0.000 description 1
- 208000035473 Communicable disease Diseases 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 241001180472 Iris japonica Species 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 241000237502 Ostreidae Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 235000004224 Typha angustifolia Nutrition 0.000 description 1
- 235000003095 Vaccinium corymbosum Nutrition 0.000 description 1
- 240000000851 Vaccinium corymbosum Species 0.000 description 1
- 235000017537 Vaccinium myrtillus Nutrition 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000021014 blueberries Nutrition 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000005341 cation exchange Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000020636 oyster Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000008262 pumice Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229940124530 sulfonamide Drugs 0.000 description 1
- 150000003456 sulfonamides Chemical class 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000011269 treatment regimen Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/40—Organic compounds containing sulfur
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Botany (AREA)
- Biotechnology (AREA)
- Biological Treatment Of Waste Water (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to the technical field of environmental remediation, in particular to a filler for removing antibiotics, an artificial wetland system and a method thereof. The filler for removing the antibiotics comprises biomass charcoal and gravel, wherein the biomass charcoal is uniformly mixed with the gravel. Meanwhile, the artificial wetland system for removing the antibiotics comprises the filler, the artificial wetland main body, wetland plants and pipelines; the filler is filled in the artificial wetland main body, wetland plants are planted on the surface of the artificial wetland main body, pipe holes are formed in the circumferential direction of the pipeline, a pipe orifice at the bottom end of the pipeline is inserted into the artificial wetland from top to bottom, and the pipeline is in close fit with the filler. The invention aims to solve the problems that the existing filler for the constructed wetland system has low efficiency of removing and purifying antibiotics in sewage, so that the existing constructed wetland system is difficult to effectively remove the antibiotics in the sewage, and the cost for removing the antibiotic residues in the sewage is high.
Description
Technical Field
The invention relates to the technical field of environmental remediation, in particular to a filler for removing antibiotics, an artificial wetland system and a method thereof.
Background
Antibiotics play a vital role in human health as antibacterial agents for controlling infectious diseases in humans. In recent years, the massive discharge of antibiotics poses serious threats to ecological systems and human health, the antibiotics exist in water bodies for a long time and generate drug-resistant bacteria in the environment, so that a plurality of drugs are ineffective, and the antibiotics are easy to destroy the balance of the ecological systems. Environmental pollutants such as sulfonamides are among the most commonly used antibiotics in the world, in particular Sulfamethoxazole (SMX), due to the low cost and high efficiency of treatment of a large number of microbial infections. Different concentration ranges of SMX in ng/L level are prevalent in sewage treatment plants, rivers and groundwater discharge. Therefore, efficient removal of SMX and other emerging contaminants is critical.
At present, artificial Wetland Systems (CWs) are known as engineered ecological treatment systems, which are a series of biophysical chemical processes initiated by the synergistic action of substrates, macrophytes and microorganisms. CWs have become an important alternative treatment strategy for sewage treatment, which can purify various kinds of sewage, such as secondary sewage, mining-affected water, domestic sewage, livestock sewage, rainstorm and agricultural runoff. In order to improve the purification effect of CWs, the filler is an indispensable component because it can trap pollutants, stimulate the growth of large plants, and provide an ecological niche for the growth of microorganisms and the attachment of biofilms. Many new, highly active media such as zeolites, limestone, granular clays, oyster shells, pumice, ceramics and medical stones have been widely used. When zeolite, oyster shell or ceramic is used as the only filler in the CWs system, most of conventional pollutants including Biochemical Oxygen Demand (BOD), Chemical Oxygen Demand (COD), nitrogen and phosphorus can be removed by using the existing filler, so that a good removal effect can be achieved, and high treatment performance of the CWs is realized.
However, in low C/N ratio sewage, conventional fillers are used in a CWs system, and the existing CWs has low antibiotic removal and purification efficiency, so that before antibiotic residues are discharged into the environment, antibiotic removal equipment needs to be separately used to purify and remove the antibiotic residues in the sewage, and the sewage treatment for removing the antibiotic residues needs high cost, and therefore, new, low-cost and efficient fillers are urgently needed to remove the antibiotic.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the filler for removing the antibiotics, the artificial wetland system and the method thereof, and aims to solve the problems that the existing filler for the artificial wetland system has low efficiency for removing and purifying the antibiotics in the sewage, so that the existing artificial wetland system is difficult to effectively remove the antibiotics in the sewage, and the high cost is required for removing the antibiotic residues in the sewage.
In order to achieve the purpose, the invention adopts the following technical scheme: the filler for removing the antibiotics comprises biomass charcoal and gravel, wherein the biomass charcoal is uniformly mixed with the gravel.
When the technical scheme is adopted, the removal of conventional pollutants can be effectively enhanced through the fillers of the biomass charcoal and the gravel, and antibiotics can be effectively removed.
Preferably, the mixing ratio of the biomass charcoal to the gravel is 1: 99.
preferably, the particle size of the biomass charcoal is 1-5mm, and the diameter of the gravel is 1-3 mm.
Preferably, the biomass charcoal is made of bamboo.
The invention also provides an artificial wetland system for removing antibiotics, which comprises the filler, the artificial wetland main body, wetland plants and pipelines; the filler is filled in the artificial wetland main body, wetland plants are planted on the surface of the artificial wetland main body, pipe holes are formed in the circumferential direction of the pipeline, a pipe orifice at one end of the pipeline is inserted into the artificial wetland main body from top to bottom, and the pipeline is tightly matched with the filler.
Preferably, the artificial wetland main body is a surface flow artificial wetland, a horizontal subsurface flow artificial wetland or a vertical subsurface flow artificial wetland, and the ratio of the width to the height of the artificial wetland main body is 1: 3.
preferably, the wetland plant comprises one or more of cattail, piny blueberries, canna, reed, iris citrifolia and iris.
Preferably, the planting density of the wetland plants is 380-450 plants/m2。
Preferably, the pipeline is a porous PVC pipe, the height of the porous PVC pipe is equal to that of the artificial wetland main body, and a pipe orifice at the bottom end of the porous PVC pipe is vertically inserted into the bottom of the artificial wetland main body.
The invention also provides a using method of the artificial wetland system, which comprises the following steps:
the method comprises a first use method and a second use method, wherein the first use method comprises the following steps:
obtaining anaerobic activated sludge and tap water, diluting the anaerobic activated sludge with the tap water, and obtaining diluted mixed activated sludge after the concentration of the diluted anaerobic activated sludge reaches 950-1050 mg/L;
adding 6L-8L of the diluted mixed activated sludge into each 10 cubic decimeters of artificial wetland system, wherein wetland plants in the artificial wetland system grow for 50-70 days;
adding sewage containing antibiotics and subjected to secondary treatment into the artificial wetland system, wherein the water inlet treatment mode of the artificial wetland system is in a sequencing batch mode, the hydraulic retention time is 9-11 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode;
wherein the reuse method comprises the steps of:
after the artificial wetland system is used for the first time, sewage containing antibiotics and subjected to secondary treatment is added into the artificial wetland system at one time, the sewage is fully filled with the filler to the roots of wetland plants, the hydraulic retention time is 9-11 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode.
Compared with the prior art, the beneficial effect that this scheme produced is:
1. the filler prepared by mixing the biomass charcoal and the gravel absorbs the antibiotics in the sewage, so that the antibiotics in the sewage can be effectively purified and removed.
2. Through the constructed wetland system that uses living beings charcoal and grit as the filler, purify sewage jointly through filler and wetland plant, not only have higher efficiency of getting rid of to conventional pollutant such as COD and ammonia nitrogen, moreover, constructed wetland system also can realize carrying out effectual purification to getting rid of to the antibiotic in the sewage.
Drawings
In order to more clearly illustrate the embodiments of the present invention, the drawings, which are required to be used in the embodiments, will be briefly described below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.
Fig. 1 is a front view of the constructed wetland system of the present invention;
fig. 2 is a side view schematically illustrating the construction of the constructed wetland system according to the present invention;
FIG. 3 is a graph comparing COD removal efficiency of fillers with and without biomass char in the present invention;
FIG. 4 is a graph comparing the ammonia nitrogen removal efficiency of fillers with biochar and fillers without biochar in the present invention;
FIG. 5 is a graph of the SMX effluent concentration and SMX removal efficiency of the biochar-bearing filler of the present invention;
fig. 6 is a graph showing the effect of SMX effluent concentration and SMX removal rate of the biochar-free filler of the present invention.
Reference numerals:
the artificial wetland comprises an artificial wetland main body 1, a filler 2, wetland plants 3 and a pipeline 4.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Example one
Referring to fig. 1-6, an antibiotic-removing packing includes biomass charcoal and gravel, and the biomass charcoal is uniformly mixed with the gravel. Wherein, the biomass charcoal accounts for 1 part by weight, and the gravel accounts for 99 parts by weight. The particle size of the biomass charcoal is 3mm, and the diameter of the gravel is 1 mm. The biomass charcoal is prepared from bamboo, and is specifically obtained by pyrolyzing bamboo for 6 hours under an anoxic environment at a temperature of 700 ℃. The filler formed by mixing the biomass carbon and the gravel has the characteristics of high porosity, large specific surface area and large cation exchange capacity, so that the absorption or attachment of pollutants such as COD (chemical oxygen demand), ammonia nitrogen, antibiotics and the like in the sewage on the filler is enhanced, and the degradation and removal of the pollutants in the sewage can be greatly improved.
The invention also provides an artificial wetland system for removing antibiotics, which comprises the filler 2, the artificial wetland main body 1, wetland plants 3 and a pipeline 4.
The constructed wetland main body 1 may be concave in shape such that the filler 2 is filled in the interior of the constructed wetland main body 1. Wetland plants 3 are planted on the surface of the artificial wetland main body 1; meanwhile, wetland plants 3 can also be planted on the filler 2 in the artificial wetland body 1. The circumference of the pipeline 4 is provided with a pipe hole, the bottom end pipe orifice of the pipeline 4 is inserted into the artificial wetland main body 1 from top to bottom, and the pipeline 4 is closely matched with the filler 2.
The artificial wetland main body 1 is a vertical subsurface flow artificial wetland, and the ratio of the width to the height of the vertical subsurface flow artificial wetland is 1: 3.
the wetland plant 3 is selected from reed and iris. Specifically, the planting density of the wetland plants 3 is 430 plants/m2。
The pipeline 4 is a porous PVC pipe, the height of the porous PVC pipe is equal to that of the artificial wetland main body 1, and a pipe orifice at the bottom end of the porous PVC pipe is vertically inserted into the bottom of the vertical subsurface flow artificial wetland. The porous PVC pipe not only facilitates sewage flow, but also can enter the porous PVC pipe through the filler 2 and be taken out, so that the physical and chemical properties such as Ph, dissolved oxygen, ORP and the like in the filler 2 can be measured in real time.
The invention also provides a use method of the artificial wetland system for removing the antibiotics, which comprises a first use method and a reuse method, wherein the first use method comprises the following steps:
step one, anaerobic activated sludge and tap water are obtained, the anaerobic activated sludge is diluted by the tap water, and the diluted mixed activated sludge is obtained after the concentration of the diluted anaerobic activated sludge reaches 950 mg/L;
and step two, adding 7L of diluted mixed activated sludge into each 10 cubic decimeters of artificial wetland system, wherein the wetland plants 3 in the artificial wetland system grow for 60 days.
And step three, adding sewage containing antibiotics and subjected to secondary treatment into the artificial wetland system, wherein the water inlet treatment mode of the artificial wetland system is sequencing batch, the hydraulic retention time is 10 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode.
Wherein, the reuse method comprises the following steps:
after the artificial wetland system is used for the first time, sewage containing antibiotics and subjected to secondary treatment is added into the artificial wetland system at one time, the sewage is soaked in the filler 2 to the root of the wetland plant 3, the hydraulic retention time is 10 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode. Meanwhile, in the first use method and the second use method, the temperature of the artificial wetland system can be controlled between 20 and 26 ℃, and the pH value of the sewage entering the artificial wetland system for secondary treatment is preferably between 6.5 and 8.5.
Example two
Referring to fig. 1 to 6, an antibiotic-removing packing 2 includes biomass charcoal and gravel, and the biomass charcoal is uniformly mixed with the gravel. Wherein, the biomass charcoal accounts for 0.5 part by weight, and the gravel accounts for 99.5 parts by weight. The particle size of the biomass charcoal is 1mm, and the diameter of the gravel is 3 mm. The biomass charcoal is prepared from bamboo, and is specifically obtained by pyrolyzing bamboo for 6 hours under an anoxic environment at a temperature of 700 ℃. The filler 2 made by mixing the biomass charcoal and the gravel absorbs the antibiotics in the sewage, so that the antibiotics in the sewage can be removed well.
The invention also provides an artificial wetland system for removing antibiotics, which comprises the filler 2, the artificial wetland main body 1, wetland plants 3 and a pipeline 4.
The filler 2 is filled into the artificial wetland main body 1, the wetland plants 3 are planted on the surface of the artificial wetland main body 1, the pipe holes are formed in the circumferential direction of the pipeline 4, the bottom pipe orifice of the pipeline 4 is inserted into the artificial wetland from top to bottom, and the pipeline 4 is closely matched with the filler 2.
Wherein, constructed wetland main part 1 is the surface current constructed wetland, and the width of constructed wetland main part 1 and the ratio of height are 1: 3.
the wetland plant 3 is selected from Typha angustifolia, windmill grass, canna indica, reed, yellow iris and Iris japonica. Specifically, the planting density of the wetland plants 3 is 380 plants/m2。
In this embodiment, the pipeline 4 is a porous PVC pipe, the height of the porous PVC pipe is equal to that of the artificial wetland main body 1, and a bottom pipe orifice of the porous PVC pipe is vertically inserted into the bottom of the surface flow artificial wetland.
The artificial wetland system purifies the sewage together through the filler 2 and the wetland plants 3, so that the artificial wetland system has higher removal efficiency for conventional pollutants such as COD (chemical oxygen demand) and ammonia nitrogen, and also has higher removal efficiency for antibiotics.
The invention also provides a use method of the artificial wetland system for removing the antibiotics, which comprises a first use method and a reuse method, wherein the first use method comprises the following steps:
step one, anaerobic activated sludge and tap water are obtained, the anaerobic activated sludge is diluted by the tap water, and the diluted mixed activated sludge is obtained after the concentration of the diluted anaerobic activated sludge reaches 950 mg/L;
and step two, adding 6L of diluted mixed activated sludge into each 10 cubic decimeters of artificial wetland system, wherein the wetland plants 3 in the artificial wetland system grow for 50 days.
And step three, adding sewage containing antibiotics and subjected to secondary treatment into the artificial wetland system, wherein the water inlet treatment mode of the artificial wetland system is sequencing batch, the hydraulic retention time is 9 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode.
Wherein, the reuse method comprises the following steps:
after the artificial wetland system is used for the first time, sewage containing antibiotics and subjected to secondary treatment is added into the artificial wetland system at one time, the sewage is soaked in the filler 2 to the root of the wetland plant 3, the hydraulic retention time is 9 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode. Meanwhile, in the first use method and the second use method, the temperature of the artificial wetland system can be controlled between 20 and 26 ℃, and the pH value of the sewage entering the artificial wetland system for secondary treatment is preferably between 6.5 and 8.5.
EXAMPLE III
Referring to fig. 1 to 6, an antibiotic-removing packing 2 includes biomass charcoal and gravel, and the biomass charcoal is uniformly mixed with the gravel. Wherein, the biomass charcoal accounts for 1.5 parts by weight, and the gravel accounts for 89.5 parts by weight. The particle size of the biomass charcoal is 5mm, and the diameter of the gravel is 1 mm. The biomass charcoal is made of bamboo; specifically, the biomass charcoal is obtained by pyrolyzing bamboo for 6 hours in an anoxic environment at a temperature of 700 ℃.
The invention also provides an artificial wetland system for removing antibiotics, which comprises the filler 2, the artificial wetland main body 1, wetland plants 3 and a pipeline 4.
The filler 2 is filled into the artificial wetland main body 1, the wetland plants 3 are planted on the surface of the artificial wetland main body 1, the pipe holes are formed in the circumferential direction of the pipeline 4, the bottom pipe orifice of the pipeline 4 is inserted into the artificial wetland from top to bottom, and the pipeline 4 is closely matched with the filler 2.
The artificial wetland main body 1 is a horizontal subsurface flow artificial wetland, and the ratio of the width to the height of the horizontal subsurface flow artificial wetland is 1: 3.
the wetland plant 3 is selected from yellow iris. Specifically, the planting density of the wetland plants 3 is 450 plants/m2。
The pipeline 4 is a porous PVC pipe, the height of the porous PVC pipe is equal to that of the artificial wetland main body 1, and a pipe orifice at the bottom end of the porous PVC pipe is vertically inserted into the bottom of the horizontal subsurface flow artificial wetland.
The invention also provides a use method of the artificial wetland system for removing the antibiotics, which comprises a first use method and a reuse method, wherein the first use method comprises the following steps:
step one, anaerobic activated sludge and tap water are obtained, the anaerobic activated sludge is diluted by the tap water, and the diluted mixed activated sludge is obtained after the concentration of the diluted anaerobic activated sludge reaches 1050 mg/L;
and step two, adding 8L of diluted mixed activated sludge into each 10 cubic decimeters of artificial wetland system, wherein the wetland plants 3 in the artificial wetland system grow for 70 days.
And step three, adding sewage containing antibiotics and subjected to secondary treatment into the artificial wetland system, wherein the water inlet treatment mode of the artificial wetland system is sequencing batch, the hydraulic retention time is 11 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode.
Wherein, the reuse method comprises the following steps:
after the artificial wetland system is used for the first time, sewage containing antibiotics and subjected to secondary treatment is added into the artificial wetland system at one time, the sewage is fully filled in the filler 2 to the roots of wetland plants 3, the hydraulic retention time is 11 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode. Meanwhile, in the first use method and the second use method, the temperature of the artificial wetland system can be controlled between 20 and 26 ℃, and the pH value of the sewage entering the artificial wetland system for secondary treatment is preferably between 6.5 and 8.5.
Comparative example 1
In the first comparative example, only the components of the filler 2 are replaced, and the filler 2 in the first comparative example is prepared by mixing common fine sand and biomass-free carbon.
Referring to fig. 3 to 6 together, the experiment was conducted in the same manner as in the first comparative example through the first, second and third examples.
By the use method of the artificial wetland system, the carbon-nitrogen ratio in the sewage subjected to secondary treatment is adjusted, namely C/N is sequentially from 3: 1. 7.5: 1 to 12.5: 1, to verify the treatment effect of the biomass charcoal filler 2 and the biomass charcoal-free filler 2 on different C/N inflow water.
50ml samples were taken for contaminant content analysis on days 3, 7 and 10, respectively, during a hydraulic retention time.
The results show that:
in the first comparison example, the constructed wetland system which adopts the mixture of the common fine sand and the biomass-free carbon as the filler 2 has the removal rate of about 69 percent of COD, the removal efficiency of the ammonia nitrogen is only 56 percent, and the removal rate of the antibiotic sulfamethoxazole is only 17.2 percent.
In the first comparative example, although the removal effect on conventional pollutants such as COD and ammonia nitrogen is still certain, the removal efficiency on pollutants such as COD and ammonia nitrogen in sewage is not high, and the removal rate on antibiotics is extremely low.
In the invention, the mixed filler 2 of biomass charcoal and gravel has higher removal efficiency for common pollutants such as COD and ammonia nitrogen and also has higher removal efficiency for antibiotics.
Specifically, the removal rate of the artificial wetland system on COD can reach 80%, the removal rate on ammonia nitrogen can reach 90%, the removal rate on sulfamethoxazole can reach 95.7%, and the removal rate on ammonia nitrogen is at least 70% even under the condition of no carbon source.
The above results show that the constructed wetland system of the filler 2 formed by mixing the biomass charcoal and the gravel can effectively enhance the removal of conventional pollutants and antibiotics.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The filler for removing antibiotics is characterized by comprising biomass charcoal and gravel, wherein the biomass charcoal is uniformly mixed with the gravel.
2. The antibiotic-removing filler according to claim 1, wherein the biomass charcoal comprises, in parts by mass: 0.5-1.5 parts of gravel: 89.5 to 99.5 portions.
3. The antibiotic-removing packing according to claim 2, wherein the biomass charcoal has a particle size of 1 to 5mm and the gravel has a diameter of 1 to 3 mm.
4. The antibiotic-removing filler according to claim 3, wherein the biomass charcoal is made of bamboo.
5. An artificial wetland system for removing antibiotics, which is characterized by comprising the filler (2) of any one of claims 1 to 3, an artificial wetland main body (1), wetland plants (3) and a pipeline (4);
the artificial wetland comprises an artificial wetland main body (1), a filler (2), wetland plants (3) and a pipeline (4), wherein the filler (2) is filled into the artificial wetland main body (1), the wetland plants (3) are planted on the surface of the artificial wetland main body (1), the pipeline (4) is circumferentially provided with a pipe hole, a bottom pipe orifice of the pipeline (4) is inserted into the artificial wetland main body (1) from top to bottom, and the pipeline (4) and the filler (2) are tightly matched.
6. The antibiotic removal constructed wetland system according to claim 5, wherein the constructed wetland main body (1) is a surface flow constructed wetland, a horizontal subsurface flow constructed wetland or a vertical subsurface flow constructed wetland.
7. The antibiotic-removing artificial wetland system according to claim 6, wherein the wetland plants (3) comprise one or more combinations of cattail, pinwheel grass, canna, reed, irises and iris.
8. The antibiotic removing artificial wetland system according to claim 7, wherein the planting density of wetland plants (3) is 380-450 plants/m2。
9. The constructed wetland system for removing antibiotics according to claim 8, characterized in that the pipeline (4) is a porous PVC pipe, the porous PVC pipe is as high as the constructed wetland main body (1), and the bottom end pipe orifice of the porous PVC pipe is vertically inserted into the bottom of the constructed wetland main body (1).
10. The method of using an artificial wetland system according to any one of claims 5 to 9, comprising a first use method and a second use method, wherein the first use method comprises the following steps:
obtaining anaerobic activated sludge and tap water, diluting the anaerobic activated sludge with the tap water, and obtaining diluted mixed activated sludge after the concentration of the diluted anaerobic activated sludge reaches 950-1050 mg/L;
adding 6L-8L of the diluted mixed activated sludge into each 10 cubic decimeters of artificial wetland system, wherein wetland plants in the artificial wetland system grow for 50-70 days;
adding sewage containing antibiotics and subjected to secondary treatment into the artificial wetland system, wherein the water inlet treatment mode of the artificial wetland system is sequencing batch, the hydraulic retention time is 9-11 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode;
wherein the reuse method comprises the steps of:
after the artificial wetland system is used by the first use method, sewage containing antibiotics and subjected to secondary treatment is added into the artificial wetland system at one time, the sewage is fully filled with the filler to the root of wetland plants, the hydraulic retention time is 9-11 days, and after the hydraulic retention time, water in the artificial wetland system is discharged in a gravity drainage mode.
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Cited By (1)
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| CN115010265A (en) * | 2022-07-01 | 2022-09-06 | 成都理工大学 | Method for removing antibiotics and resistance genes in water body by using plants and attached biomembranes thereof |
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