CN114230097A - Treatment process of sewage containing organic phosphorus - Google Patents
Treatment process of sewage containing organic phosphorus Download PDFInfo
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- CN114230097A CN114230097A CN202111556328.8A CN202111556328A CN114230097A CN 114230097 A CN114230097 A CN 114230097A CN 202111556328 A CN202111556328 A CN 202111556328A CN 114230097 A CN114230097 A CN 114230097A
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- phosphorus
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 229910052698 phosphorus Inorganic materials 0.000 title claims abstract description 78
- 239000011574 phosphorus Substances 0.000 title claims abstract description 78
- 239000010865 sewage Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000008569 process Effects 0.000 title claims abstract description 39
- 239000010802 sludge Substances 0.000 claims abstract description 37
- 238000001179 sorption measurement Methods 0.000 claims abstract description 37
- 150000003017 phosphorus Chemical class 0.000 claims abstract description 17
- YUWBVKYVJWNVLE-UHFFFAOYSA-N [N].[P] Chemical class [N].[P] YUWBVKYVJWNVLE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 11
- 239000003895 organic fertilizer Substances 0.000 claims abstract description 6
- 230000007062 hydrolysis Effects 0.000 claims abstract description 4
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 4
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 17
- 239000000243 solution Substances 0.000 claims description 17
- 239000007800 oxidant agent Substances 0.000 claims description 15
- 239000000843 powder Substances 0.000 claims description 15
- 230000001590 oxidative effect Effects 0.000 claims description 14
- 229910052746 lanthanum Inorganic materials 0.000 claims description 13
- 229910021536 Zeolite Inorganic materials 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 12
- 239000010457 zeolite Substances 0.000 claims description 12
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 11
- -1 lanthanum modified zeolite Chemical class 0.000 claims description 10
- 239000002351 wastewater Substances 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 9
- 150000002829 nitrogen Chemical class 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 238000009210 therapy by ultrasound Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002207 metabolite Substances 0.000 claims description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 238000001556 precipitation Methods 0.000 claims description 4
- 241001474374 Blennius Species 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000010405 anode material Substances 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000010406 cathode material Substances 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000008394 flocculating agent Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000035484 reaction time Effects 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000000967 suction filtration Methods 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- 229910021642 ultra pure water Inorganic materials 0.000 claims description 3
- 239000012498 ultrapure water Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 2
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 12
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 6
- 229910052700 potassium Inorganic materials 0.000 abstract description 6
- 239000011591 potassium Substances 0.000 abstract description 6
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 239000002361 compost Substances 0.000 abstract description 3
- 239000002689 soil Substances 0.000 abstract description 3
- 239000003337 fertilizer Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 description 2
- 239000000575 pesticide Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 230000004083 survival effect Effects 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
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05B—PHOSPHATIC FERTILISERS
- C05B17/00—Other phosphatic fertilisers, e.g. soft rock phosphates, bone meal
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
- C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
- C05G3/40—Mixtures of one or more fertilisers with additives not having a specially fertilising activity for affecting fertiliser dosage or release rate; for affecting solubility
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/34—Treatment of water, waste water, or sewage with mechanical oscillations
- C02F1/36—Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
-
- 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
-
- 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
- C02F2101/30—Organic compounds
- C02F2101/306—Pesticides
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Pest Control & Pesticides (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Water Treatment By Sorption (AREA)
- Fertilizers (AREA)
Abstract
The invention discloses a treatment process of sewage containing organic phosphorus; the organophosphorus sewage treatment process comprises the following specific steps: s3: and (4) electrifying the pH value-adjusted good sample by adopting direct current, and S4: after the electrolysis treatment is finished, directly introducing the sewage into an anaerobic tank for hydrolysis, and sequentially adding activated sludge and a modified phosphorus adsorption carrier into the sewage; according to the invention, most of organic phosphorus in sewage is removed through ultrasonic and electrolytic treatment, then the activated sludge and the modified nitrogen-phosphorus adsorption carrier are added into the anaerobic tank, a small part of organic phosphorus or inorganic phosphorus metabolites in the sewage are adsorbed by the activated sludge and the modified nitrogen-phosphorus adsorption carrier, potassium element and nitrogen element are also added into the modified nitrogen-phosphorus adsorption carrier in the modification process and are mixed with the adsorbed inorganic phosphorus metabolites, so that an organic fertilizer rich in nitrogen, phosphorus and potassium can be directly formed for plant absorption, and the formed dewatered sludge slowly releases phosphorus in soil and is used as compost, so that secondary pollution is avoided, and the method is more environment-friendly.
Description
Technical Field
The invention relates to a treatment process, in particular to a treatment process of sewage containing organic phosphorus, belonging to the technical field of sewage treatment.
Background
The discharge of the pesticide organic wastewater not only directly causes the overproof of total phosphorus and ammonia nitrogen, but also leads the water body to be eutrophicated and the algae plants to be propagated in large quantity. In addition, the discharge of waste water containing high-toxicity pesticide and compounds such as phenol, cyanogen, organic chloride and the like causes great harm to various animals and plants in the water body, causes pollution to underground water and surface water and seriously affects the survival of human beings.
At present, most of phosphorus removal processes applied at home and abroad are mainly physical, chemical and biological technologies, the most common phosphorus removal processes applied to sewage are a metal salt precipitation phosphorus removal method, a physical adsorption phosphorus removal method, a membrane treatment phosphorus removal method and a natural treatment method, and the traditional phosphorus removal process usually dilutes the phosphorus content in the sewage through a large amount of chemical agents, is easy to generate a secondary pollution phenomenon during discharge, can not continuously remove phosphorus in the phosphorus removal process and has low efficiency.
Disclosure of Invention
The invention aims to provide a treatment process of sewage containing organic phosphorus, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the treatment process of the sewage containing the organic phosphorus comprises the following specific steps:
s1: filtering the organophosphorus sewage, adding an oxidant and a catalyst, carrying out primary regulation, mixing and stirring the sewage for 1-1.5h, regulating the pH value to 4.1-4.9, and carrying out ultrasonic treatment on the organophosphorus;
s2: after first-stage oxidation adjustment and ultrasonic treatment, carrying out second-stage adjustment, adding an oxidant again, adjusting the pH value of the oxidant to 5.5-7.7, and adding a flocculating agent for precipitation;
s3: the pH value is well adjusted by adopting direct current for electrifying treatment, an anode material adopts an aluminum electrode, and a cathode material adopts a graphene electrode;
s4: after the electrolysis treatment is finished, directly introducing the sewage into an anaerobic tank for hydrolysis, and sequentially adding activated sludge and a modified phosphorus adsorption carrier into the sewage;
s5: the activated sludge metabolically decomposes organic phosphorus, and the modified nitrogen and phosphorus adsorption carrier adsorbs phosphorus or a metabolite of the phosphorus in the sewage, so that the total phosphorus level of a biochemical pool is reduced, and the sludge increment is controlled;
s6: the sedimentation speeds of the modified phosphorus adsorption carrier and the activated sludge are different, and the modified phosphorus adsorption carrier and the activated sludge are layered in the sedimentation tank, the lower layer is an activated sludge layer, and the upper layer is a modified nitrogen phosphorus adsorption carrier and activated sludge mixing layer;
s7: and (3) refluxing the lower-layer activated sludge in the sedimentation tank, discharging the rest activated sludge into a planting field along with the modified nitrogen and phosphorus adsorption carrier to be used as an organic fertilizer, discharging the treated sewage from the sedimentation tank, and controlling the pH value of the treated sewage to be 6.8-8.0.
As a preferable technical scheme of the invention, in the step S1, in the process of carrying out ultrasonic treatment on the phosphorus-containing sewage, the power of ultrasonic waves is adjusted to be 1.0-1.6W/m2, the ultrasonic frequency is controlled to be 150-200kHz, and the ultrasonic reaction time is 2-2.6 h.
As a preferable technical scheme of the invention, in the step S3, in the process of electrifying the phosphorus-containing sewage, the electrifying current is adjusted to be 0.2-0.4A, the electrolysis distance is 2-2.5 cm, and the electrolysis time is controlled to be 50-60 min.
In a preferred embodiment of the present invention, in S1, in the initial stage of the adjustment process, one or more oxidizing agents are used, the content of the oxidizing agent is 0.3-1.6% by volume of the wastewater containing organic phosphorus, the content of the catalyst is titanium dioxide, and the content of the catalyst is 0.05-0.1% by volume of the wastewater containing organic phosphorus.
As a preferred embodiment of the present invention, in step S4, the method for preparing the modified phosphorus adsorption carrier is as follows:
the first step is as follows: modifying zeolite to form lanthanum modified zeolite, and then crushing, grinding and modifying the zeolite to obtain modified zeolite powder;
the second step is as follows: adding bentonite into ultrapure water, shaking and standing, transferring the residual solid sample into a KCl solution, continuously stirring for 0.5-1.2h, then adding a nitrate nitrogen solution or an ammonium nitrogen solution again, stirring for 1-2h again, performing centrifugal separation to obtain a condensate, drying and grinding to obtain the modified bentonite.
The third step: and fully mixing the modified bentonite and the modified zeolite powder, adding the ground and dried seaweed powder after mixing, and mixing in a sodium chloride solution to form the modified nitrogen and phosphorus adsorption carrier.
As a preferred technical solution of the present invention, the preparation method of the lanthanum-modified zeolite comprises the following steps:
weighing the natural zeolite powder which is fully cleaned and dried for standby application, placing the natural zeolite powder in a 250mL conical flask, adding a lanthanum solution with a certain concentration, oscillating and reacting for 24h at a constant temperature of 25 ℃ and 150rpm in a shaking table, carrying out suction filtration and washing on the mixed solution in a Buchner funnel by using deionized water, drying for 1-2h at a temperature of 100 ℃ and 115 ℃, and placing the mixed solution in a dryer for drying to obtain the lanthanum modified zeolite.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a process for treating sewage containing organic phosphorus, which comprises filtering the sewage containing phosphorus, adjusting the sewage by two sections, oxidizing the sewage, removing most of the organic phosphorus in the sewage by ultrasonic and electrolytic treatment, adding activated sludge and modified nitrogen-phosphorus adsorption carrier in an anaerobic tank, adsorbing a small part of metabolites of the organic phosphorus or inorganic phosphorus in the sewage by the activated sludge and the modified nitrogen-phosphorus adsorption carrier, wherein the modified nitrogen-phosphorus adsorption carrier is formed by mixing lanthanum modified zeolite and modified bentonite, potassium element and nitrogen element are added into the modified nitrogen-phosphorus adsorption carrier during the modification process and are mixed with the adsorbed metabolites of the inorganic phosphorus, thereby directly forming organic fertilizer rich in nitrogen, phosphorus and potassium for plant absorption, not excessively discharging into the organic phosphorus, and further phosphorus pollution again, the phosphorus removal process can continuously remove phosphorus from the sewage, and the formed dewatered sludge slowly releases phosphorus in soil, when the fertilizer is used as compost, secondary pollution can not be generated, and the fertilizer is more environment-friendly.
Drawings
FIG. 1 is a schematic view of the flow structure of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, the present invention provides a technical scheme of a treatment process for wastewater containing organic phosphorus: the treatment process of the sewage containing the organic phosphorus is characterized by comprising the following specific steps of:
s1: filtering the organophosphorus sewage, adding an oxidant and a catalyst, carrying out primary regulation, mixing and stirring the sewage for 1-1.5h, regulating the pH value to 4.1-4.9, and carrying out ultrasonic treatment on the organophosphorus;
s2: after first-stage oxidation adjustment and ultrasonic treatment, carrying out second-stage adjustment, adding an oxidant again, adjusting the pH value of the oxidant to 5.5-7.7, and adding a flocculating agent for precipitation;
s3: the pH value is well adjusted by adopting direct current for electrifying treatment, an anode material adopts an aluminum electrode, and a cathode material adopts a graphene electrode;
s4: after the electrolysis treatment is finished, directly introducing the sewage into an anaerobic tank for hydrolysis, and sequentially adding activated sludge and a modified phosphorus adsorption carrier into the sewage;
s5: the activated sludge metabolically decomposes organic phosphorus, and the modified nitrogen and phosphorus adsorption carrier adsorbs phosphorus or a metabolite of the phosphorus in the sewage, so that the total phosphorus level of a biochemical pool is reduced, and the sludge increment is controlled;
s6: the sedimentation speeds of the modified phosphorus adsorption carrier and the activated sludge are different, and the modified phosphorus adsorption carrier and the activated sludge are layered in the sedimentation tank, the lower layer is an activated sludge layer, and the upper layer is a modified nitrogen phosphorus adsorption carrier and activated sludge mixing layer;
s7: and (3) refluxing the lower-layer activated sludge in the sedimentation tank, discharging the rest activated sludge into a planting field along with the modified nitrogen and phosphorus adsorption carrier to be used as an organic fertilizer, discharging the treated sewage from the sedimentation tank, and controlling the pH value of the treated sewage to be 6.8-8.0.
In the step S1, in the process of carrying out ultrasonic treatment on the phosphorus-containing sewage, the power of ultrasonic waves is adjusted to be 1.0-1.6W/m2, the ultrasonic frequency is controlled to be 150-200kHz, and the ultrasonic reaction time is controlled to be 2-2.6 h.
In the step S3, in the process of electrifying the phosphorus-containing sewage, the electrifying current is adjusted to be 0.2-0.4A, the electrolysis distance is 2-2.5 cm, and the electrolysis time is controlled to be 50-60 min.
In step S1, in the initial stage of the adjustment process, the oxidant used is one or more of hydrogen peroxide and sodium persulfate, the content of the oxidant is 0.3-1.6% of the volume of the wastewater containing organic phosphorus, the catalyst is titanium dioxide, and the content of the catalyst is 0.05-0.1% of the volume of the wastewater containing organic phosphorus.
In step S4, the modified phosphorus adsorption carrier is prepared by the following method:
the first step is as follows: modifying zeolite to form lanthanum modified zeolite, and then crushing, grinding and modifying the zeolite to obtain modified zeolite powder;
the second step is as follows: adding bentonite into ultrapure water, shaking and standing, transferring the residual solid sample into a KCl solution, continuously stirring for 0.5-1.2h, then adding a nitrate nitrogen solution or an ammonium nitrogen solution again, stirring for 1-2h again, performing centrifugal separation to obtain a condensate, drying and grinding to obtain the modified bentonite.
The third step: and fully mixing the modified bentonite and the modified zeolite powder, adding the ground and dried seaweed powder after mixing, and mixing in a sodium chloride solution to form the modified nitrogen and phosphorus adsorption carrier.
The preparation method of the lanthanum modified zeolite comprises the following steps:
weighing the natural zeolite powder which is fully cleaned and dried for standby application, placing the natural zeolite powder in a 250mL conical flask, adding a lanthanum solution with a certain concentration, oscillating and reacting for 24h at a constant temperature of 25 ℃ and 150rpm in a shaking table, carrying out suction filtration and washing on the mixed solution in a Buchner funnel by using deionized water, drying for 1-2h at a temperature of 100 ℃ and 115 ℃, and placing the mixed solution in a dryer for drying to obtain the lanthanum modified zeolite.
The invention has positive beneficial effects that after the phosphorus-containing sewage is filtered, the sewage is subjected to two-stage regulation and oxidation treatment, and is subjected to ultrasonic and electrolysis treatment to remove most of organic phosphorus in the sewage, then the activated sludge and the modified nitrogen-phosphorus adsorption carrier are added into the anaerobic tank, the activated sludge and the modified nitrogen-phosphorus adsorption carrier adsorb a small part of organic phosphorus or inorganic phosphorus metabolites in the sewage, the modified nitrogen-phosphorus adsorption carrier is formed by mixing lanthanum modified zeolite and modified bentonite, potassium element and nitrogen element are also added into the modified nitrogen-phosphorus adsorption carrier in the modification process and are mixed with the adsorbed inorganic phosphorus metabolites, so that organic fertilizer rich in nitrogen, phosphorus and potassium can be directly formed for plant absorption, excessive discharge into the organic phosphorus can not occur, and phosphorus pollution is realized again, the phosphorus removal process can continuously remove phosphorus from the sewage, and the formed dehydrated sludge slowly releases phosphorus in soil, when the fertilizer is used as compost, secondary pollution can not be generated, and the fertilizer is more environment-friendly.
In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly attached, detachably attached, or integrated; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The treatment process of the sewage containing the organic phosphorus is characterized by comprising the following specific steps of:
s1: filtering the organophosphorus sewage, adding an oxidant and a catalyst, carrying out primary regulation, mixing and stirring the sewage for 1-1.5h, regulating the pH value to 4.1-4.9, and carrying out ultrasonic treatment on the organophosphorus;
s2: after first-stage oxidation adjustment and ultrasonic treatment, carrying out second-stage adjustment, adding an oxidant again, adjusting the pH value of the oxidant to 5.5-7.7, and adding a flocculating agent for precipitation;
s3: the pH value is well adjusted by adopting direct current for electrifying treatment, an anode material adopts an aluminum electrode, and a cathode material adopts a graphene electrode;
s4: after the electrolysis treatment is finished, directly introducing the sewage into an anaerobic tank for hydrolysis, and sequentially adding activated sludge and a modified phosphorus adsorption carrier into the sewage;
s5: the activated sludge metabolically decomposes organic phosphorus, and the modified nitrogen and phosphorus adsorption carrier adsorbs phosphorus or a metabolite of the phosphorus in the sewage, so that the total phosphorus level of a biochemical pool is reduced, and the sludge increment is controlled;
s6: the sedimentation speeds of the modified phosphorus adsorption carrier and the activated sludge are different, and the modified phosphorus adsorption carrier and the activated sludge are layered in the sedimentation tank, the lower layer is an activated sludge layer, and the upper layer is a modified nitrogen phosphorus adsorption carrier and activated sludge mixing layer;
s7: and (3) refluxing the lower-layer activated sludge in the sedimentation tank, discharging the rest activated sludge into a planting field along with the modified nitrogen and phosphorus adsorption carrier to be used as an organic fertilizer, discharging the treated sewage from the sedimentation tank, and controlling the pH value of the treated sewage to be 6.8-8.0.
2. The process of claim 1, wherein the treatment process comprises the following steps: in the step S1, in the process of performing ultrasonic treatment on the phosphorus-containing sewage, the power of ultrasonic waves is adjusted to be 1.0-1.6W/m2, the ultrasonic frequency is controlled to be 150-200kHz, and the ultrasonic reaction time is controlled to be 2-2.6 h.
3. The process of claim 1, wherein the treatment process comprises the following steps: in the step S3, in the process of electrifying the phosphorus-containing sewage, the electrifying current is adjusted to be 0.2-0.4A, the electrolysis distance is 2-2.5 cm, and the electrolysis time is controlled to be 50-60 min.
4. The process of claim 1, wherein the treatment process comprises the following steps: in step S1, in the initial stage of the adjustment process, the oxidant used is one or more of hydrogen peroxide and sodium persulfate, the content of the oxidant is 0.3-1.6% of the volume of the wastewater containing organic phosphorus, the catalyst is titanium dioxide, and the content of the catalyst is 0.05-0.1% of the volume of the wastewater containing organic phosphorus.
5. The process of claim 1, wherein the treatment process comprises the following steps: in step S4, the modified phosphorus adsorption carrier is prepared by the following method:
the first step is as follows: modifying zeolite to form lanthanum modified zeolite, and then crushing, grinding and modifying the zeolite to obtain modified zeolite powder;
the second step is as follows: adding bentonite into ultrapure water, shaking and standing, transferring the residual solid sample into a KCl solution, continuously stirring for 0.5-1.2h, then adding a nitrate nitrogen solution or an ammonium nitrogen solution again, stirring for 1-2h again, performing centrifugal separation to obtain a condensate, drying and grinding to obtain the modified bentonite.
The third step: and fully mixing the modified bentonite and the modified zeolite powder, adding the ground and dried seaweed powder after mixing, and mixing in a sodium chloride solution to form the modified nitrogen and phosphorus adsorption carrier.
6. The process of claim 5, wherein the wastewater containing organic phosphorus is treated by the following steps: the preparation method of the lanthanum modified zeolite comprises the following steps:
weighing the natural zeolite powder which is fully cleaned and dried for standby application, placing the natural zeolite powder in a 250mL conical flask, adding a lanthanum solution with a certain concentration, oscillating and reacting for 24h at a constant temperature of 25 ℃ and 150rpm in a shaking table, carrying out suction filtration and washing on the mixed solution in a Buchner funnel by using deionized water, drying for 1-2h at a temperature of 100 ℃ and 115 ℃, and placing the mixed solution in a dryer for drying to obtain the lanthanum modified zeolite.
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| CN117305854A (en) * | 2023-11-30 | 2023-12-29 | 常熟理工学院 | Method for recycling elemental phosphorus from organophosphorus pesticide-containing soil by utilizing waste incineration fly ash |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117305854A (en) * | 2023-11-30 | 2023-12-29 | 常熟理工学院 | Method for recycling elemental phosphorus from organophosphorus pesticide-containing soil by utilizing waste incineration fly ash |
| CN117305854B (en) * | 2023-11-30 | 2024-02-23 | 常熟理工学院 | Method for recycling elemental phosphorus from organophosphorus pesticide-containing soil by utilizing waste incineration fly ash |
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