CN111348800A - Natural rubber wastewater treatment process - Google Patents
Natural rubber wastewater treatment process Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 244000043261 Hevea brasiliensis Species 0.000 title claims abstract description 41
- 229920003052 natural elastomer Polymers 0.000 title claims abstract description 38
- 229920001194 natural rubber Polymers 0.000 title claims abstract description 38
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 17
- 239000002351 wastewater Substances 0.000 claims abstract description 68
- 239000000126 substance Substances 0.000 claims abstract description 22
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 238000001556 precipitation Methods 0.000 claims abstract description 12
- 238000005345 coagulation Methods 0.000 claims abstract description 9
- 230000015271 coagulation Effects 0.000 claims abstract description 9
- 239000008394 flocculating agent Substances 0.000 claims abstract description 8
- 238000002144 chemical decomposition reaction Methods 0.000 claims abstract description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 10
- 238000009300 dissolved air flotation Methods 0.000 claims description 8
- 239000000395 magnesium oxide Substances 0.000 claims description 7
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 7
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 7
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 125000000129 anionic group Chemical group 0.000 claims description 3
- 125000002091 cationic group Chemical group 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 238000009280 upflow anaerobic sludge blanket technology Methods 0.000 claims 1
- 229920000098 polyolefin Polymers 0.000 abstract description 9
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 8
- 239000011574 phosphorus Substances 0.000 abstract description 8
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 abstract description 7
- 230000001376 precipitating effect Effects 0.000 abstract description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 8
- 229920001971 elastomer Polymers 0.000 description 8
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 238000004062 sedimentation Methods 0.000 description 5
- 150000003384 small molecules Chemical class 0.000 description 5
- 230000004931 aggregating effect Effects 0.000 description 4
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 4
- 230000000593 degrading effect Effects 0.000 description 4
- 239000004816 latex Substances 0.000 description 4
- 229920000126 latex Polymers 0.000 description 4
- 230000003647 oxidation Effects 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- GLDOVTGHNKAZLK-UHFFFAOYSA-N n-octadecyl alcohol Natural products CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 description 3
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- IGFHQQFPSIBGKE-UHFFFAOYSA-N Nonylphenol Natural products CCCCCCCCCC1=CC=C(O)C=C1 IGFHQQFPSIBGKE-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 238000006065 biodegradation reaction Methods 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- SNQQPOLDUKLAAF-UHFFFAOYSA-N nonylphenol Chemical compound CCCCCCCCCC1=CC=CC=C1O SNQQPOLDUKLAAF-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 239000010802 sludge Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000208125 Nicotiana Species 0.000 description 1
- 235000002637 Nicotiana tabacum Nutrition 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003306 harvesting Methods 0.000 description 1
- 239000000463 material Substances 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
- 230000008520 organization Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Images
Classifications
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- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
- C02F2103/38—Polymers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/18—PO4-P
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- 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
- C02F3/02—Aerobic processes
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- 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
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- 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
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention relates to a natural rubber wastewater treatment process, which comprises the following steps: adding flocculant into natural rubber wastewater, precipitating, performing dissolved air floatation on the wastewater subjected to S1 to remove floating substances, and adding Mg into the wastewater subjected to S22+Performing precipitation separation, performing biological treatment on the wastewater subjected to S3, and adding Fe into the wastewater subjected to S42+、H2O2And carrying out chemical degradation, and carrying out coagulation separation on the wastewater subjected to S5. The invention aims at the natural rubber wastewater and adds flocculating agent and Mg2+、Fe2+、H2O2And combines with biological treatment process, can effectively remove a large amount of granular, suspended and emulsified impuritiesAnd the polyolefin substances are biodegraded, and the content of ammonia nitrogen and total phosphorus is reduced, so that the aim of finally reaching the discharge standard is fulfilled.
Description
Technical Field
The invention relates to the fields of environmental protection, chemical industry and materials, in particular to a natural rubber wastewater treatment process.
Background
The natural rubber refers to natural fresh latex collected from rubber trees, and can be made into tobacco flakes, air-dried films, crepes, technical-graded dry rubber, concentrated latex and the like according to different rubber making methods. In 2019, the latest data of the international rubber research organization show that the total rubber planting area of the global rubber producing country is 1331.14 ten thousand hectares, wherein 12.51 thousand hectares in Asia area account for about 9 percent of the global rubber tree planting area. The largest yield of the raw rubber is Thailand, but the first place of the planting area is Indonesia, the total area is 363.9 ten thousand hectares, the third place of the world is the planting area of Chinese rubber trees, the total area is 116.1 ten thousand hectares, wherein the harvesting area is 72 ten thousand hectares, and the yield per hectare is 1075 kg. The glue planting areas in China are mainly distributed in the areas of Hainan, Guangdong, Guangxi, Fujian, Yunnan and the like, wherein the Hainan and the Yunnan are used as the main glue planting areas.
High-concentration organic wastewater can be generated and discharged in the primary processing process of the natural rubber, wherein COD in the concentrated latex wastewater and the full-latex wastewater is up to 8000-10000 ng/L, the ammonia nitrogen concentration is up to 700mg/L, and the total phosphorus concentration is up to 200 mg/L. The phosphate in the glue-making wastewater is derived from the raw materials and the phosphorus-containing substances added in the processing process. This waste water, if discharged into the environmental water without effective treatment, would have a significant negative impact on the environment.
At present, the treatment of the natural rubber wastewater mainly adopts a treatment process mainly based on a biological method, such as: the anaerobic method, the aerobic method and the anaerobic-anoxic-aerobic method are combined, because the natural rubber wastewater contains a large amount of granular, suspended and emulsified impurities and a large amount of polyolefin, the polyolefin has the characteristic of difficult biodegradation, and in addition, the high content of ammonia nitrogen and total phosphorus in the natural rubber wastewater leads to the biological method as the main part and difficult achievement of the treatment effect of stable standard discharge.
Disclosure of Invention
The invention aims to provide a natural rubber wastewater treatment process.
In order to achieve the purpose, the invention adopts the technical scheme that:
a natural rubber wastewater treatment process comprises the following steps:
s1: adding a flocculating agent into the natural rubber wastewater and carrying out precipitation separation,
s2: carrying out dissolved air flotation on the wastewater subjected to S1 to remove floating substances,
s3: addition of Mg to the wastewater completing S22+And the precipitation separation is carried out to the mixture,
s4: the wastewater subjected to S3 is subjected to a biological treatment process,
s5: addition of Fe to the wastewater completing S42+、H2O2And the chemical degradation is carried out to the mixture,
s6: and (4) carrying out coagulation separation on the wastewater subjected to S5.
Preferably, in S2: and (3) adding a demulsifier and/or a flocculant into the wastewater subjected to S1, removing floating substances, and then performing dissolved air flotation.
Further preferably, in S2: the demulsifier 100 and the flocculant 100 and 300ppm are added into the cubic natural rubber wastewater of 400ppm and 100 ppm and 300ppm respectively.
Further preferably, the demulsifier is a cationic, anionic, nonionic or zwitterionic demulsifier.
Preferably, in S6: a flocculant was added to the wastewater subjected to S5 and coagulation separation was performed.
Further preferably, in S6: 1-8 g of flocculating agent is added into one cubic piece of natural rubber wastewater.
Preferably, the flocculant is an organic flocculant and/or an inorganic flocculant.
Further preferably, the flocculant comprises a mixture of one or more of polyaluminum chloride (PAC), polyaluminum sulfate (PAS), polyferric chloride (PFC) and polyferric sulfate (PFS).
Preferably, said Mg2+Obtained by reacting sodium hydroxide and magnesium oxide.
Preferably, in S3: adding 40-90 g of sodium hydroxide and magnesium oxide into cubic natural rubber wastewater.
Preferably, the biological treatment process comprises one or a combination of an anaerobic method, an aerobic method and an anaerobic-anoxic-aerobic method.
Further preferably, the biological treatment process comprises at least one stage of UASB treatment and at least one stage of anaerobic-aerobic-precipitation treatment sequentially performed on the wastewater subjected to S3.
Preferably, said Fe2+From ferrous sulfate heptahydrate.
Further preferably, in S5: ferrous sulfate heptahydrate and hydrogen peroxide 400-1000ppm are added into the one-cubic natural rubber wastewater.
Preferably, in S1: 200 ppm and 700ppm of flocculating agent are added into the cubic natural rubber wastewater.
A natural rubber wastewater treatment process comprises the following steps:
s1: adding flocculant into the natural rubber wastewater to treat a large amount of granular, suspended and emulsified impurities in the rubber wastewater, precipitating in a sand settling tank, and then feeding into a slag separating tank, wherein the flocculant can be organic flocculant or inorganic flocculant, including polyaluminium chloride (PAC), polyaluminium sulfate (PAS), polyferric chloride (PFC), polyferric sulfate (PFS) and other inorganic flocculants or a mixture thereof,
s2: adding a demulsifier and a flocculant into the wastewater as required, removing floating substances through a grid, then carrying out dissolved air flotation, further aggregating and floating small-particle and small-specific gravity substances in the wastewater, removing the substances through a fine grid, and after treatment, greatly reducing pollutants which can be physically removed in the wastewater, wherein ammonia nitrogen, total phosphorus and the like are not effectively reduced, the demulsifier is a cationic demulsifier, an anionic demulsifier, a nonionic demulsifier and a zwitterionic demulsifier, and comprises polyoxyethylene polyoxypropylene octadecanol ether, nonylphenol polyether and the like,
s3: adding Mg to wastewater2+It can react with ammonia nitrogen and total phosphorus as follows:
Mg2++NH4++PO4 3-=MgNH4PO4，
the obtained salt is insoluble in water, so that ammonia nitrogen and total phosphorus can be reduced, and simultaneously, the salt is precipitated out from the system, Mg2+ is obtained through the reaction of sodium hydroxide and magnesium oxide, various pollutants in the treated salt are greatly reduced, the burden of a biological treatment system is greatly reduced,
s4: treating the treated wastewater according to biological treatment process, such as anaerobic process, aerobic process, anaerobic-anoxic-aerobic process, and primary UASB treatment, secondary UASB treatment, primary anaerobic treatment, primary aerobic treatment, primary precipitation, secondary anaerobic treatment, secondary aerobic treatment, and secondary precipitation,
s5: after the biological treatment process, because the polyolefin and other substances in the rubber wastewater are difficult to biodegrade, Fe is added into the wastewater2+And H2O2The free radicals produced by the reaction degrade the polyolefin into small molecules and enter an oxidation pond,
s6: and adding a flocculating agent into the wastewater according to the requirement, and discharging after the coagulation and separation.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages and effects:
the invention aims at the natural rubber wastewater and adds flocculating agent and Mg2+、 Fe2+、H2O2And a biological treatment process is combined, so that a large amount of granular, suspended and emulsified impurities can be effectively removed, polyolefin substances are biodegraded, and the content of ammonia nitrogen and total phosphorus is reduced, so that the aim of reaching the standard and discharging is fulfilled finally.
Drawings
FIG. 1 is a flow chart of the process of this example;
FIG. 2 is a flow chart of the bioremediation process of this example.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
one cube contains CODcr =8000mg/l, BOD5=5300mg/L, SS =550mg/L, TP =130mg/L, NH3Adding 300-600ppm polyaluminium chloride (PAC) into natural rubber wastewater with N =160mg/l, precipitating through a sand sedimentation tank, then entering a slag separation tank, adding 100-300ppm polyaluminium chloride (PAC) into polyoxyethylene polyoxypropylene octadecanol ether with the content of 300ppm, removing floating substances through a grid, then performing dissolved air flotation, further aggregating and floating small-particle specific weight substances in the wastewater, removing through a fine grid, sequentially adding 50-60 g of sodium hydroxide and 50-60 g of magnesium oxide into the wastewater after the treatment, performing biological treatment on the treated wastewater after precipitation separation, adding 500ppm ferrous sulfate heptahydrate and 1000ppm hydrogen peroxide into the wastewater, degrading the polyolefin into small molecules, and entering an oxidation tank after the treatment, after newly generated micromolecular organic matters generated by biodegradation are degraded, 2-5 g of Polymeric Ferric Sulfate (PFS) and 1-3 g of Polymeric Aluminum Chloride (PAC) are finally added, and coagulation separation is carried out. The treated waste water contains CODcr less than or equal to 70mg/L, BOD5 less than or equal to 10mg/L, SS less than or equal to 40mg/L, NH3N is less than or equal to 10mg/L, TP is less than or equal to 0.5mg/L, and the waste gas can reach the discharge standard.
Example two:
one cube contains CODcr =7000mg/l, BOD5=5000mg/L, SS =600mg/L, TP =150 mg/L, NH3-Adding 400-700ppm polyferric sulfate (PFS) into natural rubber wastewater with the concentration of N =180mg/l, precipitating the natural rubber wastewater by a sand sedimentation tank, entering a slag separation tank, adding 150-350ppm nonylphenol polyether, adding 100-300ppm polyferric sulfate (PFS), removing floating substances by a grid, performing dissolved air flotation, further aggregating and floating small-particle small-specific-gravity substances in the wastewater, removing the small-particle small-specific-gravity substances by a fine grid, sequentially adding 40-65 g of sodium hydroxide and 40-65 g of magnesium oxide, performing precipitation separation, performing biological treatment on the treated wastewater, adding 400-900ppm ferrous sulfate heptahydrate and 400-900ppm hydrogen peroxide, degrading polyolefin into small molecules, entering an oxidation tank after the treatment, and degrading newly generated small-molecule organic matters by biological degradation, finally, 1-3 g of Polymeric Ferric Sulfate (PFS) and 1-3 g of Polymeric Aluminum Chloride (PAC) are added, and then coagulation separation is carried out. The treated waste water contains CODcr less than or equal to 60mg/L, BOD5 less than or equal to 8mg/L, SS less than or equal to 35mg/L, NH3-N is less than or equal to 9mg/L, TP is less than or equal to 0.4 mg/L, and the waste gas can reach the discharge standard.
Example three:
one cube contains CODcr =9000mg/l, BOD5=6000mg/L, SS =800mg/L, TP =180mg/L, NH3-Adding 300-500ppm polyaluminium chloride (PAC) and 200-400ppm polyferric sulfate (PFS) into natural rubber wastewater with N =200mg/l, precipitating through a sand sedimentation tank, then entering a slag separation tank, adding 200-400ppm polyoxyethylene polyoxypropylene octadecanol ether, adding 100-300ppm polyferric sulfate (PFS), removing floating substances through a grating, then carrying out dissolved air flotation, further aggregating and floating small-particle small-specific-gravity substances in the wastewater, then removing through a fine grating, sequentially adding 60-90 g of sodium hydroxide and 60-90 g of magnesium oxide, carrying out biological treatment on the treated wastewater after precipitation separation, adding 500-1000ppm ferrous sulfate heptahydrate and 500-1000ppm hydrogen peroxide, degrading polyolefin into small molecules, and entering an oxidation tank after the treatment, new generation of biodegradationAfter the micromolecular organic matter is degraded, 1-3 g of polyaluminium chloride (PAC) is finally added, and coagulation separation is carried out. The treated waste water contains CODcr less than or equal to 60mg/L, BOD5 less than or equal to 8mg/L, SS less than or equal to 35mg/L, NH3-N is less than or equal to 9mg/L, TP is less than or equal to 0.4 mg/L, and the waste gas can reach the discharge standard.
Comparative example one:
one cube contains CODcr =8000mg/l, BOD5=5300mg/L, SS =550mg/L, TP =130mg/L, NH3-Introducing natural rubber wastewater with N =160mg/L into a primary UASB (upflow anaerobic sludge blanket) and a secondary UASB (upflow anaerobic sludge blanket) in sequence, then introducing the wastewater into a primary anaerobic treatment device, a primary aerobic treatment device and a primary sedimentation device in sequence, introducing the wastewater into a secondary anaerobic treatment device, a secondary aerobic treatment device and a secondary sedimentation device for treatment, and then discharging, wherein the discharged wastewater contains CODcr (chemical oxygen demand) less than or equal to 120mg/L, BOD5 less than or equal to 10mg/L, SS (suspended substance) less than or equal to 80mg/L3-N is less than or equal to 10mg/L, TP is less than or equal to 2.6 mg/L, and the standard discharge cannot be achieved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A natural rubber wastewater treatment process is characterized in that: the method comprises the following steps:
s1: adding a flocculating agent into the natural rubber wastewater and carrying out precipitation separation,
s2: carrying out dissolved air flotation on the wastewater subjected to S1 to remove floating substances,
s3: addition of Mg to the wastewater completing S22+And the precipitation separation is carried out to the mixture,
s4: the wastewater subjected to S3 is subjected to a biological treatment process,
s5: addition of Fe to the wastewater completing S42+、H2O2And the chemical degradation is carried out to the mixture,
s6: and (4) carrying out coagulation separation on the wastewater subjected to S5.
2. The natural rubber wastewater treatment process according to claim 1, characterized in that: in S2: and (3) adding a demulsifier and/or a flocculant into the wastewater subjected to S1, removing floating substances, and then performing dissolved air flotation.
3. The natural rubber wastewater treatment process according to claim 2, characterized in that: the demulsifier is cationic, anionic, nonionic or zwitterionic demulsifier.
4. The natural rubber wastewater treatment process according to claim 1, characterized in that: in S6: a flocculant was added to the wastewater subjected to S5 and coagulation separation was performed.
5. A natural rubber wastewater treatment process according to claim 1, 2 or 4, characterized in that: the flocculant is an organic flocculant and/or an inorganic flocculant.
6. A natural rubber wastewater treatment process according to claim 5, characterized in that: the flocculant comprises one or more of polyaluminium chloride (PAC), polyaluminium sulfate (PAS), polyferric chloride (PFC) and polyferric sulfate (PFS).
7. The natural rubber wastewater treatment process according to claim 1, characterized in that: said Mg2+Obtained by reacting sodium hydroxide and magnesium oxide.
8. The natural rubber wastewater treatment process according to claim 1, characterized in that: the biological treatment process comprises the combination of an anaerobic method, an aerobic method and an anaerobic-anoxic-aerobic method.
9. The natural rubber wastewater treatment process according to claim 7, characterized in that: the biological treatment process comprises the steps of sequentially carrying out at least one stage of UASB treatment and at least one stage of anaerobic-aerobic-precipitation treatment on the wastewater subjected to S3.
10. The natural rubber wastewater treatment process according to claim 1, characterized in that: the Fe2+ is selected from ferrous sulfate heptahydrate.
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