CN112479508A - Wastewater treatment system and method - Google Patents
Wastewater treatment system and method Download PDFInfo
- Publication number
- CN112479508A CN112479508A CN202011508145.4A CN202011508145A CN112479508A CN 112479508 A CN112479508 A CN 112479508A CN 202011508145 A CN202011508145 A CN 202011508145A CN 112479508 A CN112479508 A CN 112479508A
- Authority
- CN
- China
- Prior art keywords
- wastewater
- activated carbon
- carbon adsorption
- ozone
- catalytic oxidation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 118
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 59
- 230000003197 catalytic effect Effects 0.000 claims abstract description 55
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 52
- 230000003647 oxidation Effects 0.000 claims abstract description 49
- 239000002351 wastewater Substances 0.000 claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 48
- 238000001179 sorption measurement Methods 0.000 claims abstract description 44
- 238000006243 chemical reaction Methods 0.000 claims abstract description 27
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 25
- 238000012856 packing Methods 0.000 claims abstract description 15
- 239000003054 catalyst Substances 0.000 claims description 20
- 238000001914 filtration Methods 0.000 claims description 16
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 13
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 13
- 239000004571 lime Substances 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 10
- 238000003860 storage Methods 0.000 claims description 8
- 238000010907 mechanical stirring Methods 0.000 claims description 7
- 239000012528 membrane Substances 0.000 claims description 7
- 230000014759 maintenance of location Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 238000006385 ozonation reaction Methods 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 150000003839 salts Chemical class 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 abstract description 2
- 229920002521 macromolecule Polymers 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 21
- 238000001223 reverse osmosis Methods 0.000 description 11
- 239000010865 sewage Substances 0.000 description 7
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 5
- 229910002551 Fe-Mn Inorganic materials 0.000 description 4
- 238000007599 discharging Methods 0.000 description 4
- 241000383620 Allium mongolicum Species 0.000 description 3
- 241000209082 Lolium Species 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000008394 flocculating agent Substances 0.000 description 3
- 229910021536 Zeolite Inorganic materials 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000011272 standard treatment Methods 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 239000010457 zeolite Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000003187 Juncus effusus Species 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 239000006004 Quartz sand Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000012668 chain scission Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000009297 electrocoagulation Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- -1 for example Substances 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 229920002401 polyacrylamide Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000002344 surface layer Substances 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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2101/10—Inorganic compounds
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/101—Sulfur compounds
-
- 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
-
- 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
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
- C02F5/06—Softening water by precipitation of the hardness using calcium compounds
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Water Treatment By Sorption (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention provides a wastewater treatment system and a wastewater treatment method, which comprise the following steps: mechanical agitator, ozone catalytic oxidation unit, active carbon adsorption unit and constructed wetland that connect gradually, wherein ozone catalytic oxidation unit includes one or more ozone catalytic oxidation device, active carbon adsorption unit includes active carbon adsorption reaction tank and arranges in filter core in the active carbon adsorption reaction tank, constructed wetland is undercurrent formula constructed wetland, has laid the packing layer, plants the marsh vegetation who has tolerant light salt water. Compared with the prior art, the wastewater treatment system provided by the invention has the advantages that when high-concentration wastewater is treated, the operation is simple and convenient, the system maintenance is simple, and the economic cost is low; adopt ozone catalytic oxidation device can become the micromolecule with the macromolecule organic substance oxidation in the waste water, the follow-up absorption of being convenient for adopts constructed wetland to handle, further improves treatment effect.
Description
Technical Field
The invention belongs to the field of environmental protection, and particularly relates to a wastewater treatment system and a wastewater treatment method
Background
At present, common sewage treatment methods are mature day by day, and a step of concentrating harmful substances is often generated in common sewage treatment to generate high-concentration wastewater, for example, membrane treatment technology is gradually developed into water treatment technology widely used in industry and daily life. Wherein, the Reverse Osmosis (RO) technology has the characteristics of good quality of effluent water, high recovery rate and the like, and has been successfully applied to the reuse of sewage water. After the wastewater is treated and enters an RO process device, the actual water collection rate of an RO membrane is 43 percent on average per year, a large amount of concentrated water is still generated, the salinity is high, high-concentration organic matters which are difficult to degrade are contained, and the water ecology can be seriously damaged by directly discharging the organic matters. RO concentrated water and similar membrane treatment concentrated solution are discharged outside only by carrying out advanced treatment on organic matters.
Most of the incoming water recycled by the reclaimed water is the effluent of a secondary sedimentation tank subjected to biochemical treatment, and then is concentrated by ultrafiltration and RO, so that the content of organic matters and salts in the sewage is increased along with the improvement of the recovery rate. The organic matter in this type of water has two characteristics: the first raw water is subjected to biochemical treatment and is not degraded, so that the biodegradability is poor, and the removal effect of direct biochemical organic matters is poor; the salt content of the second RO concentrated water is higher, and certain influence is exerted on subsequent biochemical treatment.
Therefore, many studies have been focused on pretreatment of RO concentrate, which is performed by a certain pretreatment measure to improve the biodegradability of the concentrate, such as electrocatalysis, electrocoagulation, iron-carbon microelectrolysis, ozone oxidation, etc., and then subjected to biochemical treatment. For example, Chinese patent CN201310482321.5 discloses a method for treating reverse osmosis concentrated water, wherein wastewater is degraded by an aeration biological filter after being subjected to electrolytic catalytic oxidation, iron-carbon micro-electrolysis, hydrogen peroxide oxidation and flocculation precipitation, and the method has the disadvantages of complex flow, large dosage and difficult maintenance and operation.
Disclosure of Invention
In order to solve the technical problems, the invention provides a wastewater treatment system and a wastewater treatment method.
The specific technical scheme is as follows:
a wastewater treatment system, characterized in that the wastewater treatment system comprises:
the device comprises a mechanical stirring tank, an ozone catalytic oxidation unit, an active carbon adsorption unit and an artificial wetland which are connected in sequence;
the mechanical stirring tank is used for carrying out softening reaction of the wastewater;
the ozone catalytic oxidation unit comprises one or more ozone catalytic oxidation devices and is used for carrying out crystal form ozone catalytic oxidation reaction on the wastewater;
the activated carbon adsorption unit comprises an activated carbon adsorption reaction tank and a filter element arranged in the activated carbon adsorption reaction tank and is used for adsorbing pollutants in the wastewater and intercepting the adsorbed activated carbon;
the artificial wetland is a subsurface flow type artificial wetland, a packing layer is paved, and marsh vegetation which is tolerant to light salt water is planted, and the artificial wetland is used for further purifying the waste water.
Compared with the prior art, the system is suitable for high-concentration wastewater with poor biodegradability and COD (chemical oxygen demand) of 70-200 mg/L, and after the treatment of the system, the effluent can reach the discharge standard that the COD is less than or equal to 50mg/L, so that a new way is provided for standard treatment of the high-concentration wastewater; the operation is simple, the system maintenance is simple, and the economic cost is low; adopt ozone catalytic oxidation device can become the micromolecule with the macromolecule organic substance oxidation in the waste water, the follow-up absorption of being convenient for adopts constructed wetland to handle, further improves treatment effect.
Further, the ozone catalytic oxidation device is a catalytic oxidation tower.
Further, the ozone catalytic oxidation unit also comprises an ozone generator connected with the ozone catalytic oxidation device.
Further, a water storage tank is connected to a through pipe between the ozone catalytic device and the activated carbon adsorption reaction tank, and a water inlet pump is installed on the through pipe between the water storage tank and the activated carbon adsorption reaction tank.
Further, an aeration pipeline is installed at the bottom of the activated carbon adsorption reaction tank and connected with a fan arranged in the activated carbon adsorption reaction tank.
The beneficial effect of adopting the further technical scheme is that: the activated carbon can be mixed with sewage by adopting an aeration pipeline.
Furthermore, the filtering filter element is a 0.2-0.5 micron ceramic membrane or a 800-1200 mesh steel wire mesh with a supporting structure.
The beneficial effect of adopting the further technical scheme is that the activated carbon in the sewage can be fully removed.
Furthermore, the constructed wetland is paved with a packing layer, and is planted with marsh vegetation which can tolerate light salt water, the packing layer is a gravel packing layer, the thickness is 1 m-1.5 m, and the porosity is 26% -48%.
Furthermore, the constructed wetland is paved with a packing layer, the planting vegetation is ryegrass, allium mongolicum regel and rush, the packing layer 1102 is a gravel packing layer and a sand soil surface layer, the total thickness is 1.5m, and the porosity is 32%.
A wastewater treatment method using the system, which is different from the above-described wastewater treatment method, comprising:
step S1, lime softening: adding lime into the wastewater to soften the wastewater;
step S2, catalytic oxidation by ozone: introducing ozone into the wastewater, and adding a catalyst to perform catalytic oxidation of the ozone;
step S3, activated carbon adsorption filtration: adding activated carbon powder into the wastewater treated in the step S2, mixing, adsorbing, and filtering to retain the activated carbon;
step S4, artificial wetland treatment, namely discharging the wastewater treated in the step S3 to the artificial wetland;
wherein, step S2 adopts one-stage or multi-stage catalytic oxidation, and the catalyst is a supported catalyst layer: comprising Cu2+、Fe2+、Fe3+、Mn2+、Ni2+、Ag+、Zn2+、CuO、FeO、Fe2O3One or more of MnO, NiO, AgO or ZnO.
Compared with the prior art, the invention has the beneficial effects that: (1) the ozone catalytic oxidation can partially degrade organic pollutants, can degrade open-loop chain scission of macromolecular organic matters into micromolecular organic matters, is more favorable for subsequent activated carbon adsorption, improves the biodegradability of wastewater, and is favorable for removing the organic matters of the artificial wetland; (2) the powdered activated carbon can be recycled in the system, so that the economic efficiency is better; (3) the effluent of the sewage treated by the method can reach the discharge standard that COD is less than or equal to 50mg/L, and a new way is provided for the standard treatment of reverse osmosis concentrated water and membrane concentrated wastewater; (4) lime is adopted to soften the wastewater, so that a large amount of calcium, magnesium ions and sulfate radicals in the wastewater can be removed.
Further, in the step S1, a flocculating agent is added at the same time, wherein the flocculating agent includes polyaluminium chloride and/or polyacrylamide.
The beneficial effect of adopting the further technical scheme is that: the suspended particles in the effluent can be reduced.
Further, H is introduced into the wastewater before the catalytic oxidation of ozone is carried out2O2In the step S2, the adding concentration of ozone used for each stage of ozone catalytic oxidation in the step S2 is 1 mg/L-3 mg/L, the retention time of the ozone is 2 min-20 min, and the thickness of the catalyst layer is 1.2 m-1.5 m.
The beneficial effects of selecting the further technical scheme are that: the introduction of hydrogen peroxide can enhance the oxidizing effect of the subsequent step S2.
Further, in the step S2, the catalyst is a ZnO/zeolite supported catalyst or a Fe-Mn/AC supported catalyst.
Further, in the step S2, the catalyst is Fe-Mn/AC supported catalyst.
In the step S3, the input amount of the activated carbon is 200mg/L to 500 mg/L.
In the step S4, the thickness of the artificial wetland is 1m to 1.5m, the porosity is 26% to 48%, and the retention time in the artificial wetland is 1d to 3 d.
Drawings
FIG. 1 is a schematic structural view of the present invention;
the method comprises the following steps of A-an ozone catalytic oxidation unit, B-an active carbon adsorption unit, 1-an ozone generator, 2-an ozone catalytic oxidation device, 3-a tail gas treatment device, 4-an intermediate water storage tank, 5-a water inlet pump, 6-a fan, 7-an active carbon adsorption reaction tank, 8-an active carbon filtration filter element, 9-a water production pump, 10-a carbon discharge pump, 11-an artificial wetland, 1101-a wetland tank body, 1102-a filler layer, 1103-a plant and 12-a mechanical stirring tank.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Example 1
The embodiment provides a wastewater treatment system:
the method comprises the following steps: the device comprises a mechanical stirring tank 12, an ozone catalytic oxidation unit A, an active carbon adsorption unit B and an artificial wetland 11 which are sequentially connected, wherein the ozone catalytic oxidation unit A comprises an ozone catalytic oxidation device 2 and an ozone generator 1, the ozone catalytic oxidation device 2 is connected with the ozone generator 1, a supported catalyst layer (not shown in the figure) is arranged in the ozone catalytic oxidation device 2, the catalyst layer is a (ZnO/zeolite supported catalyst), and the thickness of the catalyst layer is 1.2 m-1.5 m;
ozone catalytic oxidation device 2 with between the active carbon adsorption reaction tank 7 siphunculus pipe connection have middle storage water tank 4, middle storage water tank 4 with between the active carbon adsorption reaction tank 7 siphunculus pipe installs intake pump 5, ozone catalytic unit 2 is connected with tail gas processing apparatus 3.
In this embodiment, the catalytic ozonation device 2 is a catalytic oxidizer.
The activated carbon adsorption unit B comprises an activated carbon adsorption reaction tank 7, an activated carbon filter element 8, a water production pump 9 and a carbon discharge pump 10, wherein the activated carbon filter element 8 is arranged in the activated carbon adsorption reaction tank 7.
An aeration pipeline (not shown in the figure) is installed at the bottom of the activated carbon adsorption reaction tank 7, the aeration pipeline (not shown in the figure) is connected with a fan 6 arranged on the activated carbon adsorption reaction tank 7, the activated carbon adsorption reaction tank 7 is further connected with a carbon discharge pipeline, and a carbon discharge pump 10 is installed on the carbon discharge pipeline.
The artificial wetland is a subsurface flow type artificial wetland 11, a packing layer 1102 is paved, and marsh vegetation 1103 which can tolerate fresh salt water is planted, in the embodiment, the planting is prepared into rush, the packing layer 1102 is a gravel packing layer and quartz sand, the thickness is 1.2 meters, and the porosity is 26%.
The use method of the system comprises the following steps: sequentially adding lime and a flocculating agent into the wastewater in a mechanical stirring tank 12, removing precipitates, introducing the wastewater into a catalytic oxidation tower, introducing ozone into a catalytic oxidation tower 2 after an ozone generator 1 generates ozone, carrying out an ozone catalytic oxidation reaction, after the reaction is finished, introducing the wastewater into an intermediate water storage tank, then pumping the wastewater into an activated carbon adsorption reaction tank, then adding carbon, starting an aeration pipe for mixing, then closing aeration, depositing a layer of membrane on the surface of an activated carbon filter element, then starting a water production pump for continuously producing water until the filtering pressure difference of the device exceeds the set pressure difference or the filtering flow rate of the system is lower than the lowest set flow rate, stopping water inlet, starting aeration, removing the mixture in the device, and discharging the adsorbed wastewater into an artificial wetland.
Example 2
Wastewater treatment was carried out using the system of example 1:
wastewater of a certain printing and dyeing enterprise is recycled as reclaimed water by adopting an ultrafiltration and reverse osmosis process, and the water quantity is 3000m3The water quality of the reverse osmosis concentrated water produced is shown in table 1 below:
TABLE 1 index of wastewater to be treated
Index (I) | COD | Color intensity | SS | PH |
Unit of | mg/L | -- | mg/L | -- |
Numerical value | 160 | 150 | 50 | 6~9 |
The processing steps are as follows:
step S1, lime softening: lime is sequentially added into the wastewater to soften the water and reduce suspended matters in the wastewater, so that the burden caused by post-treatment is avoided;
step S2, catalytic oxidation by ozone: adding hydrogen peroxide solution into the mixture of the water inlet pipe before the lime is softened and enters the catalytic oxidation tower, enhancing the catalytic effect of ozone, introducing ozone into the wastewater, and performing catalytic oxidation of ozone on the catalyst layer, wherein the contact time of the catalytic oxidation of ozone is 10min, and the adding amount of ozone is 3 mg/L.
Step S3, activated carbon adsorption filtration: adding activated carbon powder into the wastewater treated in the step S2, mixing, adsorbing, and filtering to retain the activated carbon;
in this example, the initial amount of activated carbon added was 3% of the cell volume, and the total amount of activated carbon added was 200mg/L to 500 mg/L. After the return water is clear, a water producing pump is started, and water is sucked out under negative pressure;
step S4, artificial wetland treatment, namely discharging the wastewater treated in the step S3 to the artificial wetland;
lime softening, ozone catalytic oxidation, an active carbon adsorption and filtration device and an artificial wetland are adopted, wastewater subjected to ozone catalytic oxidation enters an active carbon adsorption and filtration device through a lift pump, then a carbon coating is put on the wastewater, water passing through the active carbon adsorption and filtration device enters the subsurface flow type artificial wetland, vegetation selected by the artificial wetland is rush, and the following table shows that the removal effect of water quality indexes in each stage is shown in table 2.
TABLE 2 treatment Effect of the treatment stages
Index (I) | COD(mg/L) | Multiple of chroma | SS(mg/L) |
Lime softening | 154 | 150 | -- |
Ozone catalytic oxidation effluent | 101 | 50 | 45 |
Filtering the effluent by activated carbon adsorption | 77 | 35 | 40 |
Effluent of constructed wetland | 46 | 33 | 31 |
Example 3
This example provides a system for wastewater treatment in which the catalyst layer was (Fe-Mn/AC supported catalyst) as compared to example 1
Example 4
The wastewater treatment was carried out by using the system of example 3, and the treatment results are shown in Table 3.
TABLE 3 treatment Effect of the treatment stages
Index (I) | COD(mg/L) | Multiple of chroma | SS(mg/L) |
Lime softening | 154 | 150 | -- |
Ozone catalytic oxidation effluent | 94 | 40 | 45 |
Filtering the effluent by activated carbon adsorption | 69 | 30 | 20 |
Effluent of constructed wetland | 40 | 30 | 31 |
Example 5
This embodiment provides a system for wastewater treatment, compare with embodiment 1, the constructed wetland is the subsurface flow constructed wetland system, and in this embodiment, planting vegetation is ryegrass, allium mongolicum regel and juncus effusus, packing layer 1102 is gravel packing layer and sand surface course, and the gross thickness is 1.5 meters, and the porosity is 32%.
Example 6
The wastewater treatment was carried out by using the system of example 5, and the treatment results are shown in Table 4.
TABLE 4 treatment Effect of the treatment stages
Index (I) | COD(mg/L) | Multiple of chroma | SS(mg/L) |
Lime softening | 154 | 150 | -- |
Ozone catalytic oxidation effluent | 101 | 50 | 45 |
Filtering the effluent by activated carbon adsorption | 77 | 35 | 20 |
Effluent of constructed wetland | 39 | 30 | 38 |
From the results, the high-concentration wastewater treated by the system and the method can reach the discharge standard that COD is less than or equal to 50mg/L after the high-concentration wastewater is treated by the system and the method;
meanwhile, the inventor researches a team to optimize the catalyst for ozone oxidation and the wetland, and finds that the catalytic effect is better by adopting the Fe-Mn/AC supported catalyst, and the purifying effect is better by adopting the planted vegetation as ryegrass, allium mongolicum regel and rush.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A wastewater treatment system, comprising:
the device comprises a mechanical stirring tank, an ozone catalytic oxidation unit, an active carbon adsorption unit and an artificial wetland which are connected in sequence;
the mechanical stirring tank is used for carrying out softening reaction of the wastewater;
the ozone catalytic oxidation unit comprises one or more ozone catalytic oxidation devices and is used for carrying out crystal form ozone catalytic oxidation reaction on the wastewater;
the activated carbon adsorption unit comprises an activated carbon adsorption reaction tank and a filter element arranged in the activated carbon adsorption reaction tank and is used for adsorbing pollutants in the wastewater and intercepting the adsorbed activated carbon;
the artificial wetland is a subsurface flow type artificial wetland and is used for further purifying the wastewater.
2. The wastewater treatment system according to claim 1, wherein an intermediate water storage tank is connected to a through pipe between the ozone catalytic device and the activated carbon adsorption reaction tank, and a water inlet pump is installed on a through pipe between the intermediate water storage tank and the activated carbon adsorption reaction tank.
3. The wastewater treatment system according to claim 1, wherein an aeration pipeline is installed at the bottom of the activated carbon adsorption reaction tank, and the aeration pipeline is connected with a fan arranged outside the activated carbon adsorption reaction tank; the activated carbon adsorption reaction tank is also connected with a carbon discharge pipeline, and a carbon discharge pump is installed on the carbon discharge pipeline.
4. The wastewater treatment system of claim 1, wherein the filter cartridge is a 0.2-0.5 μm ceramic membrane or an 800-1200 mesh steel wire mesh with a support structure.
5. The wastewater treatment system of claim 1, wherein the packing layer is a gravel packing layer having a thickness of 1m to 1.5m and a porosity of 26% to 48%.
6. The wastewater treatment system according to claim 1, wherein a water pipeline is connected between the activated carbon adsorption unit and the artificial wetland, and a water production pump is installed on the water pipeline.
7. A method for treating wastewater, comprising:
step S1, lime softening: adding lime into the wastewater to soften the wastewater;
step S2, catalytic oxidation by ozone: introducing ozone into the wastewater, and adding a catalyst layer to perform catalytic oxidation of the ozone;
step S3, activated carbon adsorption filtration: adding activated carbon powder into the wastewater treated in the step S2, mixing, adsorbing, and filtering to retain the activated carbon;
and step S4, artificial wetland treatment, wherein the wastewater treated in the step S3 is discharged to the artificial wetland.
8. The wastewater treatment method according to claim 7, wherein in step S2, H is introduced into the wastewater before catalytic ozonation2O2The adding concentration of the ozone used in each stage of catalytic oxidation of the ozone in the step S2 is 1 mg/L-3 mg/L, the retention time of the ozone is 2 min-20 min, and the thickness of the catalyst layer is 1.2 m-1.5 m.
9. The wastewater treatment method according to claim 7, wherein in step S3, the amount of activated carbon to be added is 200mg/L to 500 mg/L.
10. The wastewater treatment method according to claim 7, wherein in step S3, the thickness of the artificial wetland is 1m to 1.5m, the porosity is 26% to 48%, and the retention time in the artificial wetland is 1d to 3 d.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011508145.4A CN112479508A (en) | 2020-12-18 | 2020-12-18 | Wastewater treatment system and method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202011508145.4A CN112479508A (en) | 2020-12-18 | 2020-12-18 | Wastewater treatment system and method |
Publications (1)
Publication Number | Publication Date |
---|---|
CN112479508A true CN112479508A (en) | 2021-03-12 |
Family
ID=74914647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202011508145.4A Pending CN112479508A (en) | 2020-12-18 | 2020-12-18 | Wastewater treatment system and method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN112479508A (en) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101381190A (en) * | 2008-10-14 | 2009-03-11 | 云南大学 | Treatment technique suitable for high salt and high concentrated organic wastewater |
CN102079579A (en) * | 2009-11-26 | 2011-06-01 | 宝山钢铁股份有限公司 | Artificial wetland with combined fillers and treating process thereof |
CN102372376A (en) * | 2010-08-27 | 2012-03-14 | 中国石油化工股份有限公司 | Reverse osmosis concentrated water treatment method |
CN105174641A (en) * | 2015-10-10 | 2015-12-23 | 博瑞德(南京)净化技术有限公司 | Treating technology for chemical RO concentrated water |
CN106277598A (en) * | 2016-08-28 | 2017-01-04 | 潘纪鸿 | The processing method of high salt height Organic substance industrial wastewater |
CN109305712A (en) * | 2018-10-26 | 2019-02-05 | 湖北加德科技股份有限公司 | Powdered Activated Carbon filter device and technique for advanced treatment of wastewater |
CN109574421A (en) * | 2019-01-31 | 2019-04-05 | 清华大学深圳研究生院 | A kind of reverse osmosis concentration enhanced water processing method and equipment |
CN208843842U (en) * | 2018-05-14 | 2019-05-10 | 北京赛科康仑环保科技有限公司 | One kind being used for reverse osmosis concentrated water organic matter removal processing system |
CN214735164U (en) * | 2020-12-18 | 2021-11-16 | 湖北加德科技股份有限公司 | Wastewater treatment system |
-
2020
- 2020-12-18 CN CN202011508145.4A patent/CN112479508A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101381190A (en) * | 2008-10-14 | 2009-03-11 | 云南大学 | Treatment technique suitable for high salt and high concentrated organic wastewater |
CN102079579A (en) * | 2009-11-26 | 2011-06-01 | 宝山钢铁股份有限公司 | Artificial wetland with combined fillers and treating process thereof |
CN102372376A (en) * | 2010-08-27 | 2012-03-14 | 中国石油化工股份有限公司 | Reverse osmosis concentrated water treatment method |
CN105174641A (en) * | 2015-10-10 | 2015-12-23 | 博瑞德(南京)净化技术有限公司 | Treating technology for chemical RO concentrated water |
CN106277598A (en) * | 2016-08-28 | 2017-01-04 | 潘纪鸿 | The processing method of high salt height Organic substance industrial wastewater |
CN208843842U (en) * | 2018-05-14 | 2019-05-10 | 北京赛科康仑环保科技有限公司 | One kind being used for reverse osmosis concentrated water organic matter removal processing system |
CN109305712A (en) * | 2018-10-26 | 2019-02-05 | 湖北加德科技股份有限公司 | Powdered Activated Carbon filter device and technique for advanced treatment of wastewater |
CN109574421A (en) * | 2019-01-31 | 2019-04-05 | 清华大学深圳研究生院 | A kind of reverse osmosis concentration enhanced water processing method and equipment |
CN214735164U (en) * | 2020-12-18 | 2021-11-16 | 湖北加德科技股份有限公司 | Wastewater treatment system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102786183B (en) | Method for processing garbage leachate | |
CN106927628A (en) | Light electrolysis-Fenton-EGSB-A/O-BCO-BAF-coagulating treatment pharmacy waste water technique | |
CN102786182B (en) | Device for processing landfill leachate | |
CN107473435B (en) | Catalytic oxidation method for treating low-concentration hardly biodegradable industrial organic wastewater | |
CN107235609A (en) | A kind of deep treatment method of compound sewage | |
CN214735164U (en) | Wastewater treatment system | |
CN103145296A (en) | Method and device for treating reverse osmosis concentrated water | |
CN101781048B (en) | Low ammonia nitrogen waste water treatment and recycling method | |
CN110894125A (en) | Sewage treatment process for recycling N-methyl pyrrolidone | |
CN210176671U (en) | High-salt high-concentration degradation-resistant organic wastewater treatment equipment | |
CN106396191A (en) | Emergency treatment process and device of waste water with high COD and high NH3-N | |
CN102363549A (en) | Deep treatment system of membraneless industrial organic wastewater | |
CN203653393U (en) | Landfill leachate treatment device | |
CN105152459A (en) | Process for treating wastewater produced in regeneration of SCR denitration catalyst | |
CN102060417B (en) | Process and device for treating waste water in CLT acid production | |
CN109626494B (en) | Ultraviolet strong oxygen advanced water treatment method and device | |
CN110981116A (en) | Treatment process of lincomycin antibiotic production wastewater | |
CN206624744U (en) | Light electrolysis Fenton EGSB A/O BCO BAF coagulating treatment pharmacy waste water systems | |
CN114409207A (en) | Printing ink effluent disposal system | |
CN112479508A (en) | Wastewater treatment system and method | |
CN110117135B (en) | Garbage leachate treatment method | |
CN211078800U (en) | System for treating regenerated waste liquid of targeted nitrogen and phosphorus removal resin | |
CN211198890U (en) | Industrial wastewater treatment system | |
CN102515421B (en) | Printing and dyeing wastewater recycling system | |
CN102329032A (en) | Advanced treatment technique for recycling estuary sewage |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |