CN113526764A - Full-scale treatment process for garbage concentrated solution - Google Patents
Full-scale treatment process for garbage concentrated solution Download PDFInfo
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- CN113526764A CN113526764A CN202110797689.5A CN202110797689A CN113526764A CN 113526764 A CN113526764 A CN 113526764A CN 202110797689 A CN202110797689 A CN 202110797689A CN 113526764 A CN113526764 A CN 113526764A
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
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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
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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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
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4676—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electroreduction
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- 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
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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
- 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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
Abstract
The invention discloses a full-scale treatment process for a garbage concentrated solution, relates to the technical field of garbage treatment, and aims to solve the problems that the existing treatment process has no mature and reliable treatment mode, is higher in treatment difficulty, poorer in biodegradability and unfavorable in growth of activated sludge. This a full quantization process technology for rubbish concentrate, through the photocatalytic oxidation device that sets up, ozone catalytic oxidation system, MVR evaporation crystallization device and RO reverse osmosis unit process flow realize energy-efficient, reduced the process means that carries out the processing through the medicament in the traditional meaning to reduce the required medicament of in-process, and reduced the cost of operation.
Description
Technical Field
The invention relates to the technical field of garbage treatment, in particular to a full-scale treatment process for a garbage concentrated solution.
Background
With the increase of urban population in China, the urban domestic garbage also increases rapidly. At present, domestic waste handles mainly with landfill and burning as the main, but no matter landfill yard or msw incineration factory, rubbish is piling up, the landfill in-process, can produce multiple metabolite and moisture, all can form landfill leachate, landfill leachate's organic matter concentration is high, the TDS is high, the outward appearance is dark black, has serious stench, the pollution degree is very high, because water quality composition is complicated, pollutant concentration is high, the biodegradability is poor, difficult degradation and toxic substance are many, content such as bacterial virus is big, the processing degree of difficulty is very high.
The common treatment processes for the landfill leachate generally comprise a recharge method, a biochemical method, a physicochemical method and the like, have a certain treatment effect, and meanwhile, with the development of science and technology, a membrane separation method is widely applied to the treatment of the landfill leachate, the membrane separation technology can efficiently intercept inorganic and organic pollutants in the wastewater, the pollutants intercepted by the membrane form membrane concentrated solution, and the content of organic matters and TDS in the concentrated solution is very high and is generally 3-5 times of the concentration of the leachate, so that the existing treatment processes have no mature and reliable treatment mode, the treatment difficulty is higher, the biodegradability is worse, and the growth of activated sludge is unfavorable.
Disclosure of Invention
The invention aims to provide a full-scale treatment process for a garbage concentrated solution, which aims to solve the problems that the existing treatment process proposed in the background art has no mature and reliable treatment mode, has higher treatment difficulty and poorer biodegradability and is unfavorable for the growth of activated sludge.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a full quantization process technology for rubbish concentrate, includes photocatalytic oxidation device, equalizing basin, iron carbon catalysis from electrolytic reaction system, ozone catalytic oxidation system, MVR evaporation crystallization device and RO reverse osmosis unit, through the treatment process that photocatalytic oxidation device, equalizing basin, iron carbon catalysis formed from electrolytic reaction system, ozone catalytic oxidation system, MVR evaporation crystallization device and RO reverse osmosis unit, accomplished the processing to rubbish concentrate, concrete step is as follows:
The method comprises the following steps: homogenizing and homogenizing concentrated solution, introducing into a photocatalytic oxidation device, using a semiconductor in the photocatalytic oxidation device as a catalyst, inducing an oxidation-reduction reaction through light excitation, oxidatively decomposing organic and inorganic pollutants in the wastewater, and performing sterilization, disinfection and deodorization effects on the wastewater by using ultraviolet light;
step two: adjusting the pH value of the effluent obtained in the first step to 2-3, allowing the effluent to enter an iron-carbon catalytic electrolysis reaction system to generate a large amount of hydroxyl radicals, enabling organic matters to undergo an oxidation-reduction reaction, and enabling the organic matters to undergo ring opening and chain scission, and utilizing combined action of an electrochemical reaction and flocculation precipitation, so that the COD (chemical oxygen demand) of the wastewater can be efficiently removed, heavy metal ions and heteroatoms (sulfur, phosphorus, halogen and the like) can be removed, ammonia nitrogen and total nitrogen and the like can be removed, the removal rate of the COD in the step reaches 30-40%, the removal rate of the ammonia nitrogen reaches 30%, and the biodegradability of the wastewater can be improved;
step three: introducing the supernatant subjected to the flocculation precipitation in the second step into an ozone catalytic oxidation system, oxidizing part of easily-oxidized organic matters and part of inorganic matters in the concentrated solution by using the strong oxidation effect of ozone, further reducing the COD, BOD and odor of the wastewater, and achieving the aim of pretreatment, wherein the removal rate of the COD in the step can reach 40-50%, and the oxidation rate of ammonia nitrogen reaches 40%;
Step four: and (4) the wastewater pretreated in the first step to the third step enters an MVR evaporation crystallization device for evaporation treatment to remove soluble salts and organic matters in the wastewater, and condensed water generated by evaporation not only removes various salts, but also can well control indexes of water pollutants such as CODCr, ammonia nitrogen, total nitrogen, heavy metals and the like. The removal rate of soluble salts in the step can reach more than 90 percent;
step five: and C, filtering the condensed water subjected to the step four in an RO reverse osmosis device, discharging after reaching the standard, returning the concentrated solution subjected to membrane filtration to a pretreatment stage for repeated treatment, introducing the evaporated concentrated solution into a thickener for separation and crystallization, performing concentrated treatment on crystallized salt, and refluxing the separated water to the step four for repeated evaporation treatment.
Preferably, the water inlet end of the photocatalytic oxidation device is connected with the collection pool, and the photocatalytic oxidation device carries out photooxidation decomposition on organic and inorganic pollutants in the wastewater.
Preferably, the water inlet end of the adjusting tank is connected with the water outlet end of the photocatalytic oxidation device, and the adjusting tank adjusts the pH value of the wastewater.
Preferably, the iron-carbon catalyst is connected with the water outlet end of the regulating tank from the water inlet end of the electrolytic reaction system, a lift pump is arranged at the joint, and the iron-carbon catalyst is used for carrying out self-electrolytic reaction on the wastewater from the electrolytic reaction system.
Preferably, the MVR evaporation crystallization device is connected with the water outlet end of the ozone catalytic oxidation system, and further processes residual COD, ammonia nitrogen, TDS and the like in the pretreatment stage.
Preferably, the water inlet end of the RO reverse osmosis device is connected with the water outlet end of the condensate tank, and the residual COD and the like in the evaporated condensate water are further filtered by the RO reverse osmosis device.
Preferably, the ozone catalytic oxidation system is connected with an ozone generator.
Preferably, the iron-carbon catalyst is connected with the air inlet device from the electrolytic reaction system.
Compared with the prior art, the invention has the beneficial effects that:
1. this a full quantization process technology for rubbish concentrate can arouse redox reaction through the light excitation through the photocatalytic oxidation device that sets up, organic and inorganic pollutant among the oxidative decomposition waste water to utilize ultraviolet light to play the deodorant effect of disinfecting to waste water, the iron carbon catalysis of setting can carry out electrolytic reaction, energy-efficient from the electrolytic reaction system to waste water.
2. According to the full-scale treatment process for the garbage concentrated solution, organic matters and partial inorganic matters are decomposed by using a strong oxidation effect through an ozone catalytic oxidation system, so that the process means of treatment through medicaments in the traditional sense is reduced.
3. This a full quantization process technology for rubbish concentrate can carry out further processing to remaining COD, ammonia nitrogen, TDS etc. in the preliminary treatment stage through the MVR evaporation crystallization device that sets up, for going out the water preparation of reaching standard, shortens process flow to reduce the required medicament of in-process, and reduced the cost of operation.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a photocatalytic oxidation device; 2. a regulating tank; 3. iron-carbon catalyzed self-electrolysis reaction system; 4. an ozone catalytic oxidation system; 5. an MVR evaporative crystallization device; 6. and an RO reverse osmosis device.
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.
Referring to fig. 1, an embodiment of the present invention: the utility model provides a full quantization process technology for rubbish concentrate, including photocatalytic oxidation device 1, equalizing basin 2, iron carbon catalysis from electrolytic reaction system 3, ozone catalytic oxidation system 4, MVR evaporation crystallization device 5 and RO reverse osmosis unit 6, through photocatalytic oxidation device 1, equalizing basin 2, the treatment process that iron carbon catalysis formed from electrolytic reaction system 3, ozone catalytic oxidation system 4, MVR evaporation crystallization device 5 and RO reverse osmosis unit 6, the processing to rubbish concentrate has been accomplished, concrete step is as follows:
The method comprises the following steps: homogenizing and homogenizing concentrated solution, introducing into a photocatalytic oxidation device 1, using a semiconductor in the photocatalytic oxidation device 1 as a catalyst, inducing an oxidation-reduction reaction through light excitation, oxidatively decomposing organic and inorganic pollutants in the wastewater, and performing sterilization, disinfection and deodorization effects on the wastewater by using ultraviolet light;
step two: adjusting the pH value of the effluent obtained in the first step to 2-3, allowing the effluent to enter an iron-carbon catalytic electrolysis reaction system 3 to generate a large amount of hydroxyl radicals, so that the organic matters undergo an oxidation-reduction reaction, and the organic matters undergo ring opening and chain scission, and by utilizing the combined action of an electrochemical reaction and flocculation precipitation, the COD in the wastewater can be efficiently removed, heavy metal ions, heteroatom sulfur, phosphorus, halogen and the like are removed, ammonia nitrogen and total nitrogen and the like are removed, the removal rate of the COD in the step reaches 30-40%, the removal rate of the ammonia nitrogen reaches 30%, and the biodegradability of the wastewater is improved;
step three: introducing the supernatant subjected to the flocculation precipitation in the second step into an ozone catalytic oxidation system 4, oxidizing part of easily-oxidized organic matters and part of inorganic matters in the concentrated solution by using the strong oxidation effect of ozone, further reducing the COD, BOD and odor of the wastewater, and achieving the purpose of pretreatment, wherein the removal rate of the COD in the step can reach 40-50%, and the oxidation rate of ammonia nitrogen reaches 40%;
Step four: and (3) the wastewater pretreated in the first step to the third step enters an MVR evaporation crystallization device 5 for evaporation treatment to remove soluble salts and organic matters in the wastewater, and condensed water generated by evaporation not only removes various salts, but also can well control indexes of water pollutants such as CODCr, ammonia nitrogen, total nitrogen, heavy metals and the like. The removal rate of soluble salts in the step can reach more than 90 percent;
step five: and (4) filtering the condensed water after the step four in an RO reverse osmosis device 6, discharging after reaching the standard, returning the concentrated solution after membrane filtration to a pretreatment stage for repeated treatment, feeding the concentrated solution after evaporation into a thickener for separation and crystallization, performing concentrated treatment on crystallized salt, and refluxing the separated water to the step four for repeated evaporation treatment.
Further, the water inlet end of the photocatalytic oxidation device 1 is connected with the adjusting tank 2, organic and inorganic pollutants in the wastewater are decomposed by the photo-oxidation of the photocatalytic oxidation device 1, the photocatalytic oxidation device 1 is used for inducing an oxidation-reduction reaction through light excitation, the organic and inorganic pollutants in the wastewater are decomposed by oxidation, and the wastewater is sterilized, disinfected and deodorized by ultraviolet light.
Further, the end of intaking of equalizing basin 2 is connected with the play water end of photocatalytic oxidation device 1, and equalizing basin 2 adjusts waste water pH value, can waste water carry out an regulation of pH value through the equalizing basin 2 that sets up.
Further, the iron carbon catalysis is connected with the play water end of equalizing basin 2 from the end of intaking of electrolytic reaction system 3, and the junction is provided with the elevator pump, and the iron carbon catalysis carries out from electrolytic reaction system 3 to waste water, can carry out electrolytic reaction to waste water from electrolytic reaction system 3 through the iron carbon catalysis.
Further, MVR evaporation crystallization device 5's the end of intaking is connected with ozone catalytic oxidation system 4's play water end, and MVR evaporation crystallization device 5 carries out further processing to the remaining COD of preliminary treatment stage, ammonia nitrogen, TDS etc. can carry out further processing to the remaining COD of preliminary treatment stage, ammonia nitrogen, TDS etc. through the MVR evaporation crystallization device 5 that sets up, for going out water standard ready.
Furthermore, the water inlet end of the RO reverse osmosis device 6 is connected with the water outlet end of the condensate tank, and the residual COD and the like in the evaporated condensate water is further filtered by the RO reverse osmosis device 6.
Further, the ozone catalytic oxidation system 4 is connected with the ozone generator, organic matters and partial inorganic matters are decomposed by the strong oxidation effect of the ozone catalytic oxidation system 4, and the process means of treating through medicaments in the traditional sense is reduced.
Further, the iron-carbon catalysis is connected with the air inlet device from the electrolytic reaction system 3, and the electrolytic reaction can be carried out on the wastewater from the electrolytic reaction system 3 through the iron-carbon catalysis, so that the process is efficient and energy-saving, and the operation cost is reduced.
The working principle is as follows: when in use, firstly, after the concentrated solution is homogenized and equalized, the concentrated solution is introduced into a photocatalytic oxidation device 1, a semiconductor in the photocatalytic oxidation device 1 is used as a catalyst, an oxidation reduction reaction is caused by light excitation, organic and inorganic pollutants in the wastewater are oxidatively decomposed, the wastewater is sterilized, disinfected and deodorized by using ultraviolet light, the effluent is introduced into an iron-carbon catalysis electrolytic reaction system 3 after the pH value is adjusted to 2-3, a large amount of hydroxyl free radicals are generated, the organic matter is subjected to oxidation reduction reaction, the organic matter is subjected to ring opening and chain breaking, the electrochemical reaction and flocculation precipitation are utilized to efficiently remove the wastewater, heavy metal ions, heteroatom sulfur, phosphorus, halogen and the like, ammonia nitrogen, total nitrogen and the like are removed, the removal rate of COD in the step reaches 30-40%, the removal rate of ammonia nitrogen reaches 30%, the biodegradability of the wastewater is improved, the supernatant after flocculation precipitation is introduced into an ozone catalytic oxidation system 4, the method comprises the steps of oxidizing part of easily-oxidized organic matters and part of inorganic matters in the concentrated solution by utilizing the strong oxidation effect of ozone, further reducing COD, BOD and odor of the wastewater, achieving the purpose of pretreatment, wherein the removal rate of the COD in the step can reach 40-50%, the oxidation rate of ammonia nitrogen reaches 40%, the wastewater pretreated in the steps from the first step to the third step enters an MVR evaporation crystallization device 5 for evaporation treatment, removing soluble salts and organic matters in the wastewater, condensed water generated by evaporation not only removes various salts, but also can well control the indexes of water pollutants such as CODCr, ammonia nitrogen, total nitrogen, heavy metals and the like, the removal rate of the soluble salts in the step can reach more than 90%, the condensed water obtained in the fourth step enters a reverse osmosis device 6 for filtration, the condensed water is discharged after reaching the standard, the concentrated solution after membrane filtration returns to the pretreatment stage for repeated treatment, the evaporated concentrated solution enters a thickener for separation and then is crystallized, and (4) carrying out centralized treatment on the crystallized salt, and refluxing the separated water to the step four for repeated evaporation treatment, so that the process is more advanced and has a short process flow.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A full-scale treatment process for a garbage concentrated solution comprises the following steps: photocatalytic oxidation device (1), equalizing basin (2), iron carbon catalysis is from electrolytic reaction system (3), ozone catalytic oxidation system (4), MVR evaporation crystallization device (5) and RO reverse osmosis unit (6), through photocatalytic oxidation device (1), equalizing basin (2), iron carbon catalysis is from electrolytic reaction system (3), ozone catalytic oxidation system (4), the treatment process that MVR evaporation crystallization device (5) and RO reverse osmosis unit (6) formed, the processing to the rubbish concentrate has been accomplished, concrete step is as follows:
The method comprises the following steps: homogenizing and homogenizing concentrated solution, introducing into a photocatalytic oxidation device (1), using a semiconductor in the photocatalytic oxidation device (1) as a catalyst, inducing an oxidation-reduction reaction through light excitation, oxidatively decomposing organic and inorganic pollutants in the wastewater, and performing sterilization, disinfection and deodorization effects on the wastewater by using ultraviolet light;
step two: adjusting the pH value of the effluent obtained in the first step to 2-3, allowing the effluent to enter an iron-carbon catalytic electrolysis reaction system (3) to generate a large amount of hydroxyl radicals, so that the organic matters undergo an oxidation-reduction reaction, and the organic matters undergo ring opening and chain scission, and utilizing the combined action of an electrochemical reaction and flocculation precipitation, the COD in the wastewater can be efficiently removed, heavy metal ions, heteroatoms (sulfur, phosphorus, halogen and the like) and ammonia nitrogen and total nitrogen and the like are removed, the removal rate of the COD in the step reaches 30-40%, the removal rate of the ammonia nitrogen reaches 30%, and the biodegradability of the wastewater is improved;
step three: introducing the supernatant subjected to flocculation precipitation in the second step into an ozone catalytic oxidation system (4), oxidizing part of easily-oxidized organic matters and part of inorganic matters in the concentrated solution by using the strong oxidation effect of ozone, further reducing the COD, BOD and odor of the wastewater, and achieving the purpose of pretreatment, wherein the removal rate of the COD in the step can reach 40-50%, and the oxidation rate of ammonia nitrogen reaches 40%;
Step four: and (3) the wastewater pretreated in the first step to the third step enters an MVR evaporation crystallization device (5) for evaporation treatment to remove soluble salts and organic matters in the wastewater, and condensed water generated by evaporation not only removes various salts, but also can well control indexes of water pollutants such as CODCr, ammonia nitrogen, total nitrogen, heavy metals and the like. The removal rate of soluble salts in the step can reach more than 90 percent;
step five: and (4) filtering the condensed water after the step four in an RO reverse osmosis device (6), discharging after reaching the standard, returning the concentrated solution after membrane filtration to the pretreatment stage for repeated treatment, feeding the evaporated concentrated solution into a thickener for separation and crystallization, performing concentrated treatment on crystallized salt, and refluxing the separated water to the step four for repeated evaporation treatment.
2. The process of claim 1, wherein the process comprises the following steps: the water inlet end of the photocatalytic oxidation device (1) is connected with the collecting tank (2), and organic and inorganic pollutants in the wastewater are decomposed by the photocatalytic oxidation of the photocatalytic oxidation device (1).
3. The process of claim 1, wherein the process comprises the following steps: the water inlet end of the adjusting tank (2) is connected with the water outlet end of the photocatalytic oxidation device (1), and the pH value of the wastewater is adjusted by the adjusting tank (2).
4. The process of claim 1, wherein the process comprises the following steps: the iron-carbon catalysis carries out self-electrolysis reaction from the wastewater from the electrolysis reaction system (3) by connecting the water inlet end of the iron-carbon catalysis from the electrolysis reaction system (3) with the water outlet end of the regulating tank (2) and arranging a lift pump at the joint.
5. The process of claim 1, wherein the process comprises the following steps: the water inlet end of the ozone catalytic oxidation system (4) is connected with the water outlet end of the iron-carbon catalytic self-electrolysis reaction system (3), and the ozone catalytic oxidation system (4) conducts oxidation reaction on the wastewater.
6. The process of claim 1, wherein the process comprises the following steps: the MVR evaporation crystallization device (5) is connected with the water outlet end of the ozone catalytic oxidation system (4), and the MVR evaporation crystallization device (5) further processes residual COD, ammonia nitrogen, TDS and the like in the pretreatment stage.
7. The process of claim 1, wherein the process comprises the following steps: and the water inlet end of the RO reverse osmosis device (6) is connected with the water outlet end of the condensate water tank, and the residual COD and the like in the evaporated condensate water are further filtered by the RO reverse osmosis device.
8. The process of claim 1, wherein the process comprises the following steps: the ozone catalytic oxidation system (4) is connected with an ozone generator.
9. The process of claim 1, wherein the process comprises the following steps: the iron-carbon catalyst self-electrolysis reaction system (3) is connected with the air inlet device.
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| US5779912A (en) * | 1997-01-31 | 1998-07-14 | Lynntech, Inc. | Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant |
| US6136186A (en) * | 1997-01-31 | 2000-10-24 | Lynntech, Inc. | Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant |
| KR20030094948A (en) * | 2002-06-10 | 2003-12-18 | (주)크로바 환경 | A Process and a machine for a waste Water disposal Plant |
| CN101033105A (en) * | 2007-02-01 | 2007-09-12 | 彭云龙 | Photoelectromagnetism integrated waste water advanced oxidization method and device thereof |
| CN211141811U (en) * | 2019-10-16 | 2020-07-31 | 杭州上拓环境科技股份有限公司 | Landfill leachate's positive osmotic treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5779912A (en) * | 1997-01-31 | 1998-07-14 | Lynntech, Inc. | Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant |
| US6136186A (en) * | 1997-01-31 | 2000-10-24 | Lynntech, Inc. | Photocatalytic oxidation of organics using a porous titanium dioxide membrane and an efficient oxidant |
| KR20030094948A (en) * | 2002-06-10 | 2003-12-18 | (주)크로바 환경 | A Process and a machine for a waste Water disposal Plant |
| CN101033105A (en) * | 2007-02-01 | 2007-09-12 | 彭云龙 | Photoelectromagnetism integrated waste water advanced oxidization method and device thereof |
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Application publication date: 20211022 |