WO1987004695A1 - Process for treating waste water - Google Patents
Process for treating waste water Download PDFInfo
- Publication number
- WO1987004695A1 WO1987004695A1 PCT/JP1987/000080 JP8700080W WO8704695A1 WO 1987004695 A1 WO1987004695 A1 WO 1987004695A1 JP 8700080 W JP8700080 W JP 8700080W WO 8704695 A1 WO8704695 A1 WO 8704695A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- contact material
- sewage
- wastewater
- porous contact
- tank
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 96
- 239000002351 wastewater Substances 0.000 title claims abstract description 44
- 230000008569 process Effects 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 107
- 239000010865 sewage Substances 0.000 claims abstract description 69
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- 229910052918 calcium silicate Inorganic materials 0.000 claims abstract description 15
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 claims abstract description 15
- 210000002700 urine Anatomy 0.000 claims abstract description 10
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- 238000011282 treatment Methods 0.000 claims description 34
- 239000002994 raw material Substances 0.000 claims description 20
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 8
- 238000004065 wastewater treatment Methods 0.000 claims description 8
- 238000001027 hydrothermal synthesis Methods 0.000 claims description 7
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- 238000010298 pulverizing process Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 3
- MKTRXTLKNXLULX-UHFFFAOYSA-P pentacalcium;dioxido(oxo)silane;hydron;tetrahydrate Chemical compound [H+].[H+].O.O.O.O.[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O.[O-][Si]([O-])=O MKTRXTLKNXLULX-UHFFFAOYSA-P 0.000 claims description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 2
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 45
- 239000011574 phosphorus Substances 0.000 abstract description 45
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 45
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 18
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 13
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Classifications
-
- 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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/06—Aerobic processes using submerged filters
-
- 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
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/107—Inorganic materials, e.g. sand, silicates
-
- 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
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/1226—Particular type of activated sludge processes comprising an absorbent material suspended in the mixed liquor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
-
- 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
- C02F3/308—Biological phosphorus removal
-
- 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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S210/00—Liquid purification or separation
- Y10S210/902—Materials removed
- Y10S210/906—Phosphorus containing
Definitions
- the present invention relates to a method for treating wastewater that can easily and efficiently remove organic matters such as domestic animal urine waste, household wastewater, and sewage, denitrify, and delinse.
- Organic wastewater such as animal urine wastewater, household wastewater, and sewage causes enrichment and enrichment in lakes, marshes, and inland seas that induces “Aoko” and “Akako_”.
- There are various methods of treating such organic wastewater such as activated sludge method, sprinkling ⁇ floor method, rotating disk contact method, etc., but immersion from many points such as installation area, treatment efficiency, and maintenance ⁇ floor Laws are often adopted.
- This immersion ⁇ floor method is aerobic ⁇ a bed tank is filled with a contact material, and sewage flows into the tank and is aerated to form a biofilm on the surface of the contact material. Purifying sewage by the action of microorganisms. Gravel, plastic pieces, honeycomb tubes, etc. are used as the contact material for the immersion-floor method.
- the immersion ⁇ bed method described above can remove organic matter, but it cannot sufficiently remove nitrogen compounds and phosphoric acid and phosphate (hereinafter referred to as "lin"). Because there is no If released into closed waters, it will cause eutrophication and serious damage to fisheries and fisheries. Therefore, when treating organic sewage by the immersion-bed method, it is necessary to separately perform denitrification and rinsing.
- the biological purifying nitrogen method is performed together with the submerged bed method.
- This biological denitrification method is based on the aerobic and anaerobic conditions in the submerged door bed method. It is oxidized by Tsu N 3 ⁇ 4- N or we altered NO; - N, ⁇ ⁇ ⁇ - N and anaerobic ⁇ at floor tank was reduced under anoxic conditions Ri by the denitrifying bacteria New 2 gas This is what it is. However, in order to perform this denitrification sufficiently, it is necessary to oxidize ⁇ -:- ⁇ to ⁇ 0;- ⁇ , NO; — N in the aerobic bed tank in the immersion ⁇ bed method.
- nitrification must be performed sufficiently, but as the nitrification progresses, the pH decreases, so is it aerobic? Needs neutralization treatment with an alkaline agent in the floor tank, and there is a problem that the management and facilities become ragged, and economical use of chemicals is required. The burden is heavy.
- Methods for dephosphorization include the coagulation sedimentation method, in which the reaction with metal salts such as calcium salt aluminum and iron is carried out to remove and precipitate as phosphate.
- metal salts such as calcium salt aluminum and iron
- crystallization method in which crystallization is performed as a hydroxyapatite in the alkaline region in the presence of um.
- separate equipment such as an oil tank is required.
- organic matter removal immersion hearth method
- denitrification denitrification
- derining an example of such an organic sewage treatment process will be described with reference to FIG.
- the organic wastewater is subjected to primary treatment by a screen sedimentation basin 01 and a vibrating sieve 02 to remove suspended matters and sediments, and then to a dilution tank 03. And then dip it in water, then immerse it in the aerobic tank 04 by the bed method to remove organic matter, and adjust the pH while adjusting the pH with the alkaline agent. Do it enough.
- the anaerobic tank 0 6 Similar denitrification agitated with the addition of METHANOL Te in ⁇ tank 0 5 performs organics removal removed by Te re aerobic tank 0 7 again, de Send to the refining process.
- the pretreatment process consisting of the process of submerging the port in the sedimentation tank 010 and the crystal for removing phosphorus as the hydroxyapatite in the phosphorus tank 011
- the treated water that has undergone the derining process is sterilized in the disinfection tank 012 and then drained.
- the coagulation and sedimentation method shows an example of the treatment process.
- calcium hydroxide produced by the reaction between phosphoric acid and calcium This is to remove phosphorus by sedimentation in the form of tiles.
- the treated water after the primary sedimentation is high in pH and contains a large amount of lime. Therefore, it is necessary to neutralize and remove calcium.
- primary carbonation up to pH 9.3 10.0 where calcium carbonate has the lowest solubility is 023 and carbonate
- a post-treatment process such as precipitation of calcium, 024, secondary carbonation until neutralization, and filtration of calcium carbonate, 026 is required.
- the crystallization method delicately controls the Ca 2+ concentration and the OH concentration (pH) of the wastewater containing phosphorus as shown in Fig. 19.
- a contact material layer containing crystal seeds similar to calcium phosphate or cadmium hydroxide titanate is formed in the contact material layer 34.
- the wastewater is usually removed in the form of a title.
- carbohydrates are contained, decarboxylate with sulfuric acid and adjust the pH and Ca 2+ using slaked lime or gypsum 0 3 2 performs, that are C a C 0 3 and insolubles to ⁇ removed 0 3 3 and that when we cormorants methods force 5 to al in the treatment solution in it.
- the present invention provides a method for treating sewage, which can easily and efficiently remove organic substances, denitrify, and purify in a simple process. aimed to .
- the present inventors have conducted various studies in order to achieve the above-mentioned object, and as a result, it has been found that certain constituents composed of silicic acid rehydrated hydrate are converted into organic wastewater. In the treatment by the biofilm method, it creates a favorable environment for microbial inhabitation, crystallizes out and removes phosphate ions, and maintains a pH suitable for nitrification. The present inventor has found that the present invention has been completed.
- the first invention based on the knowledge, 50-90 Aerobic floor tanks filled with a porous contact material mainly composed of calcium silicate with a porosity of 5%, such as livestock urine waste, household wastewater, sewage, etc.
- Organic wastewater is introduced, treated by the biofilm method to remove organic matter, de-lined, and nitrified.
- the degraded treated water is introduced into an anaerobic bed tank.
- the second invention is characterized in that it has a step of performing biological denitrification, and the second invention mainly comprises calcium silicate hydrate.
- a porous contact material having a porosity of 50 to 9096 is filled into a ram or a filling tank to form a packed layer, and wastewater containing phosphorus is contained in the packed layer. It is characterized by passing water and making contact.
- the porous contact material used in the present invention is, for example, aluminum slurry or slurry containing a siliceous raw material and a calcareous raw material as main raw materials.
- What kind of foaming agent is added and the molded product obtained by hydrothermal reaction under high temperature and high pressure, or the crushed product obtained by crushing this molded product, has a porosity of 50 to 9 0% or a slurry obtained by subjecting a slurry mainly composed of a siliceous raw material and a calcareous raw material to a hydrothermal reaction under high temperature and high pressure and pulverizing if necessary.
- It is a granulated material or a granulated material or a formed product containing air bubbles and having a porosity of 50 to 90%.
- the calcium silicate hydrate is obtained by mixing the siliceous raw material and the calcareous raw material at a predetermined Ca OZS i 0 2 mole ratio (about 0.5 to 2.0). It is obtained by curing under high pressure and temperature at the required pressure and temperature in an autoclave in accordance with a conventional method, and the siliceous raw material is silica stone, Powders such as filiform, christ ballite, amorphous silica, diatomaceous earth, husky silicon dust, clay, etc., and calcareous raw materials such as quicklime, slaked lime, and cement And other powders.
- the calcium silicate hydrate obtained in this way can be used for tonnoy molite, zonotriite, CSH genole, fosharjazite, and zodiacite.
- Light, zonolite, and CSH gels are preferred because they have a high pH buffering capacity and a large specific surface area of 20 to 400 ng.
- the porous contact material used in the present invention has a porosity of 50 to 90%, but if the porosity is obtained during the formation of calcium silicate hydrate, silicate is used.
- a foaming agent such as aluminum powder or a foaming agent such as an AE agent is added to a slurry obtained by mixing a porous substance and a calcareous substance into a slurry. After that, a hydrothermal reaction may be performed under high temperature and high pressure.
- the metal foaming agent generates gas by a chemical reaction, and the usage ratio varies depending on the amount of entrained air bubbles and water in the slurry.
- Foaming agents that can be derived from formula power include, specifically, resin soaps, saponins, synthetic surfactants, and hydrolyzed tobacco. And high-molecular-weight surfactants.
- bubbles are physically introduced by the surface-active action, and bubbles are generated simply by mixing with the raw materials and stirring the mixture, or when a special stirring tank or foaming is used.
- stable foam is produced using an apparatus, and this foam is weighed and mixed with the raw material. When using such a foaming agent, it is necessary to test the stability of the foam and determine the amount to be added.
- calcium silicate hydrate with a low porosity When calcium silicate hydrate with a low porosity is obtained, if it is a molded product, it is pulverized, and air bubbles are added during the granulation or molding process.
- the porosity may be adjusted. That is, an aqueous solution of a paste of a polymer resin such as an acrylic resin emulsion is added to the powdered calcium silicate hydrate, and a foaming agent is added if necessary. After kneading, the kneaded material may be granulated by a pelletizer or molded into a form. Either natural drying or heat drying may be employed as the drying method here.
- the powdery calcium silicate hydrate a powder obtained by crushing a molded product having voids as described above is used. May be used.
- a porous contact material having a high porosity it is better to adopt a mold forming.
- the method for treating wastewater according to the first invention is a method for treating organic wastewater that has been subjected to a primary treatment of an aerobic bed filled with the porous contact material to remove suspended matters and sediments from the bed tank.
- NH: - perform the nitrification of N simultaneously is La
- NH: - N is ⁇ I spoon been N 0 2 - N, NH; - anaerobic hearth treated water containing N
- a hydrogen donor such as methanol, and reducing NO; —N, NO; —N to N 2 gas by denitrifying bacteria in an anaerobic condition. It does biological nitrogen.
- the porous contact material filled in the aerobic floor tank has fine irregularities on the surface of the calcium silicate hydrate or the gel on the surface thereof.
- microorganisms are easily fixed and biofilms are easily formed, and lower fatty acids such as lactic acid, succinic acid, and acetic acid, which are decomposition products of organic substances (microbial metabolites)
- lower fatty acids such as lactic acid, succinic acid, and acetic acid, which are decomposition products of organic substances (microbial metabolites)
- the porous contact material in the aerobic bed is formed from the crystals of the calcium silicate hydrate or the gel surface that forms the porous contact material.
- Necessary C a 2 required for crystallization of shearpatite Due to the pH buffering capacity of the contact material when supplied, the pH of the wastewater is kept low, and even if its value fluctuates, a stable state of almost pH 89 is always obtained. Ionic phosphate in the sewage reacts with Ca 2 + and crystallizes on the surface of the contact material in the form of calcium hydroxide titanate. It is.
- the pores of the porous contact material act not only to disturb the one-way flow of the sewage but also to reduce the flow velocity on the surface of the contact material. Precipitation or growth of calcium hydroxypatite by the acid ion and Ca 2 + is promoted.
- the porous contact material does not contain “crystal seeds” similar to calcium phosphate or calcium hydroxyapatite. However, because of its adsorption ability, it absorbs the generated canola hydroxyhydropatite in the early stage of passing water, and then absorbs the surface. What is the structure that is convenient for the nucleation of force calcium hydroxyapatite? It forms the nucleus of calcium hydroxytite 0 in the L part.
- the pores of the porous contact material •
- the voids have a great effect on the implantation and desorption of microorganisms
- the porous contact material used in the present invention has a porosity of 50 to 90 mm, preferably 60%. ⁇ 80% is desirable for implantation and de-rinsing of microorganisms. If the porosity of the porous contact material is less than 50%, the specific surface area is small, the implantation of microorganisms is poor, and the phosphorus removal rate is small.
- the size of the porous contact material used in the present invention also has a large effect on the phosphorus removal performance. If the diameter of the contact material is less than 0.5 mm, it will not be able to be used for a long period of time because it will be more noticeable due to SS and crystallized crystals, and on the other hand, the diameter is too large At the same time, the reduction of the contact area decreases the rate of removing the phosphorus, which is not preferable. Therefore, it is desirable that the porous contact material has a size of 0.5 to 10 mm.
- the first method of the present invention it is possible to efficiently and efficiently remove organic matter, nitrogen and phosphorus by simple and easy treatment without requiring complicated steps. It is easy to maintain and manage, and it is possible to treat high-impact sewage such as livestock urine sewage treatment and factory effluent with a high load. It can be downsized and simplified.
- the method for treating wastewater according to the second invention is characterized in that It focuses on the above-described derining operation of the contact agent, and forms a packed layer by filling the porous contact material into a force ram or a packed layer. This is achieved by passing sewage containing lin to the bed of sewage as it is.
- the method for treating sewage according to the second invention may be applied to the above-mentioned organic sewage or organic sewage from which solids have been removed by primary treatment.
- the treatment method of the first invention alone, if the removal of phosphorus is insufficient, it may be applied to the treated water so that the removal of phosphorus is completed.
- it may be applied to sewage containing phosphorus because it is other than the above-mentioned organic sewage.
- the porous contact material used in the method for treating wastewater according to the second invention is the same as the porous contact material described above.
- the lin can be efficiently removed with simple and easy processing without any complicated steps, and the maintenance is easy. Therefore, it is possible to easily and economically carry out small- and medium-scale dewatering, which has been difficult until now, such as industrial wastewater and sewage, as well as livestock wastewater and household wastewater. I can do it.
- porous contact material used in the first and second inventions also has an action of adsorbing heavy metals, if the organic sewage contains heavy metals, organic substances and phosphorus It will be removed with it.
- the porous contact material used in the first and second invention methods is very economical because it can be reused as a silicate calcareous fertilizer and a soil improvement material.
- FIGS. 1 and 2 are process diagrams showing an example of a method for treating sewage according to the first invention.
- FIG. 3 is a process diagram showing a method for treating sewage according to the second invention.
- Fig. 4 shows test examples of the first invention method (Test examples 1 and 2)!
- FIG. 5 is an explanatory view showing the apparatus used
- FIG. 5 is an explanatory view showing the apparatus used in the test example (tests 3 to 6) of the second invention method
- FIG. Figure 7 shows the relationship between the phosphorus removal rate and the pH of the test solution
- Fig. 7 shows the relationship between the phosphorus removal rate and the calcium ion concentration of the test solution in Test Example 3.
- Fig. 1 and 2 are process diagrams showing an example of a method for treating sewage according to the first invention.
- FIG. 3 is a process diagram showing a method for treating sewage according to the second invention.
- Fig. 4 shows test examples of the first invention method (Test examples 1 and 2)!
- FIG. 5 is
- FIG. 8 is a graph showing the relationship between the re-removal rate and the porosity of the treated material at test 4 and Fig. 9 is the graph showing the J-removal rate at test example 5.
- 10 and 11 are a plan view and a front view of the sewage treatment apparatus used in Example 1
- FIG. 12 is a plan view of the sewage treatment apparatus used in Example 1.
- Explanatory drawing showing the results, Fig. 13 and Fig. 14 are a plan view and a front view showing the sewage treatment equipment used for the second embodiment.
- Fig. 15 is an explanatory diagram showing the results of the practice of cooling 2
- Fig. 16 is a graph showing the results of the example 3
- Fig. 17 is a process showing the treatment process of the organic wastewater according to the prior art.
- Fig. 18 shows the conventional technology.
- Fig. 19 shows the process diagram of the coagulation sedimentation method.
- Fig. 19 shows the conventional technology. It is a process chart of such a crystallization method.
- Figs. 1 and 2 show kiyoshi in the method for treating sewage according to the first invention.
- Fig. 1 shows an example of the anaerobic hearth tank followed by an anaerobic floor tank.
- the organic sewage that has been primarily treated by the screen sand basin 1 and the vibrating sieve 2 is converted into an aerobic tank filled with the porous contact material described above. (Aerobic ⁇ bed tank) 3 to remove organic matter and purify.
- it is introduced into the ft mixing tank 4 and added with ethanol or organic wastewater.
- it is put into a anaerobic tank (anaerobic ⁇ floor tank) 5 and then nitrogen-removed, re-aerobic tank 6 and disinfection. Drained through tank 7.
- Fig. 2 shows an example of a circulation type treatment process .: As shown in the figure, what is the organic wastewater that has been primarily treated by the screen sand basin 1 and the vibrating sieve 2? After passing through the I tank 13 and the anaerobic tank 14, it is introduced into the aerobic tank 15 filled with the porous contact material, and is further circulated to the mixing tank 13. This results in organic matter treatment, phosphorus and denitrification. The treated water is discharged through the reanaerobic tank 16 and the disinfection tank 7.
- FIG. 3 shows a processing method according to the second invention.
- the sewage containing phosphorus is not subjected to pretreatment such as pH adjustment in the conventional crystallization method, and the porous contact material storage layer is left as it is. You can pass water through 30. Also, the treated water has a pH of 8 to 9 and is almost neutral and does not contain sludge, so no post treatment is required.
- the second invention method even if the phosphate concentration in the wastewater is high, derining can be performed. Teeth or to re-down in Tsu by the Han of the acid salt must you adjust the water flow rate of the sewage, the re-emission salt concentration For example 5 0 O mg in the case of Roh 1 t / / day . m 3 extent, in the case of the 5 O mgZ Ru Oh processing can be performed at about 6 t Z Date ⁇ m 3 or. At this time, the removal rate of the phosphorus is 90% or more.
- a porous contact material having a reduced effect of removing phosphorus can be used as a silicate calcareous fertilizer and a phosphatic material. It is economical because it can be reused as a raw material for fertilizer or lin.
- Silica powder and a quick lime powder was mixed in earthenware pots by that Do and C aO-ZS i 0 2 molar ratio of 1.0, with respect to solid components dispersed in 1 0 times the weight of water to form an aqueous scan la rie , Then in autoclaving at 210 bar and clean at 20 bar. Hydrothermal treatment was performed for 10 hours with stirring. Acrylic resin emulsion (solid content: 10%) was added 4 times by weight to the absolutely dried zonotrite powder obtained in this way, and then kneaded. The granules were formed, dried and solidified with a pressure of 110, and sieved to a particle size of 5 to 10 liters to obtain a porous contact material. The porosity of this was 73%.
- the slurry obtained by the same formulation as in (1) above was poured into a mold, allowed to stand for 4 hours, and then removed from the mold using an autoclave. For 10 hours at 5 atm. This molded product was coarsely crushed with a crusher and sieved to a particle size of 2.5 to 5 thighs to obtain a porous contact material. This The porosity of the contact material was 72%.
- Toba molyte contact material The molded product obtained in the same manner as in (2) above is coarsely crushed with a crusher and sieved to a particle size of 2.5 to 5 sq.m. In particular, a porous contact material was used. It has a porosity of 75%.
- Zonotriite contact material The absolutely dry zonotrite powder obtained in the same manner as in (3) above is treated with acrylic resin-margin (solid content of 10%). %) was added 4 times by weight, kneaded, granulated, dried and solidified at 110, and sieved to a particle size of 2.5 to 5 mm to obtain a porous contact material. The porosity was 73%.
- Toba molyte contact material with various porosity Table 2 shows the proportions of metal aluminum powder and water added in the production method described in (6) above. Various tobermorite contact materials were obtained by changing as shown in Table 2.
- Porosity (%) (9) Zonotriite contact material having various porosity In the method of ( 7 ) above, before granulation, Vinsol (Yamasune Chemical Manufacturing Co., Ltd.) was used as a foaming agent. ) Is operated in the same manner except that 80% and 160% of the volume of the kneaded material is added to the volume of the kneaded material by using a foam generator. Wood was obtained. When the amount of foam added was 160%, after kneading, the mixture was poured into a mold having a recess of 3 to 5 working diameters, and dried and solidified together with the mold. Table 3
- the one with no foam added was manufactured in (7).
- 200 mm X 150 mm X 31 mm first vessels 101 and 200 X 150 X 290 are filled with a porous contact material.
- the primary treated water of swine urine sewage passed through a 0.3 mm ⁇ ⁇ vibrating sieve is passed through in an upward flow.
- various porous materials can be obtained.
- the performance of the contact material was investigated.
- each of the porous contact materials manufactured in the above manufacturing examples (1), (2), and (3) is filled in the first and second tanks 1011 and 1012, and the primary treated water is charged.
- Test pieces A — 1, A — 2, and A — 3 were passed through at a flow rate of 104 days.
- NH: - N volume load Ri Contact proceeds completely nitrification even at a high-load processing of 0.4 kg ⁇ m 3, denitrification fully performed in the next step It is in a state that it is.
- 10 to 30% of NH: -N remains, so even if a biological denitrification step is added after that, the remaining NH: -N remains. — N will be spilled as is.
- the pore structure of the contact material is extremely important for increasing the chance of contact between the contact material and the organic wastewater and for implanting microorganisms in the pores and voids.
- it is extremely important for the crystal growth of crystal hydroxyapatite that crystallizes at the same time, and greatly contributes to the phosphorus removal effect.
- Test Example 3 W As shown in Fig. 5, a test solution to be treated below the acrylic column 51 with an inner diameter of 30 mm and a length of 400 mm filled with a porous contact material the by have use of the test liquid motor down click 5 2 good Ri flow regulating co click 5 3 that can in passing water through the experimental apparatus was investigated the performance of various porous contact material.
- the contact rams prepared in Production Examples (5) to (7) were filled with the above-mentioned force rams in 150 m4, and they were designated as C-1, C-2, and C-3.
- the raw water shown in Table 6 was passed through the ram at a flow rate of 300 mi / hr, and the pH and phosphoric acid ion concentration of the treated water for one week were measured. Table 6 shows the results.
- test solution was pure water and pure phosphate
- the pH of the treated water is kept at approximately 9 to 10 and is always 80% or more.
- the dephosphorization rate was obtained, in the comparative example, the dephosphorization rate did not reach 80% unless the pH of the test solution was 8.5 or more.
- Na us can have contact to the second inventive method C a 2 + improved re down removal rate et Is that the that exist in the test solution, if that Mashimasu presence Ca 2+ concentration 4 O MGZ more When the tobamorite contact material is used (A-2), the phosphorus removal rate is almost 100%.
- the particle size of the tobamolite contact material in Production Example (6) was 0.6 to: L.2, 1.2 to 2.5, 2.5 to 2.5.
- the other conditions were the same as in Test Example 3. Same as above. Figure 9 shows the results.
- a concrete sewage treatment apparatus consisting of six treatment chambers A to F as shown in FIGS. 10 and 11 was used.
- A, B, and F are aerobic ⁇ floor tanks, and A and B have tobacco particles having a particle size of 5 to 15 thighs produced in the same manner as in Production Example (2) above.
- F is filled with a porous tobacco contact material having a particle size of 5 to 8 mm, and a porous contact material whose main component is A diffuser cylinder 110a to 110c for aeration is provided below.
- These diffuser cylinders 110a to L10c are connected to the air pump 1 13 via the air piping 1 1 1 and the air adjustment valve 1 1 2 respectively. ing .
- the processing tank C is a stirring tank, and is provided with a metal tank from the metal tank 114.
- D and E are anaerobic ⁇ It is a bed tank filled with commercially available amphorasite with a particle size of 5 to 10 mm.
- the primary treated water (solid-liquid separated) from piggery sewage is sent from the wastewater inlet pipe to the wastewater inlet pipe.
- the treated water was discharged from the discharge pipe 116 through the water flow treatment at the flow rate on the day.
- the addition flow rate of methanol in the processing chamber C was 1.2 days.
- a concrete wastewater treatment apparatus consisting of six treatment chambers G to L as shown in FIGS. 13 and 14 was used.
- I and J are aerobic hearth tanks, and these tanks contain tobamollies having a particle size of 5 to 10 mm manufactured in the same manner as in Production Example (2) above.
- the contact material which is the main structure of the heat sink
- the air diffusion cylinders 120a and 120b for aeration are provided below the contact material. It is.
- These air diffusion cylinders 120a and 120b are kneaded with the air pumps 1 2 3 through the air pipes 1 2 1 and the air adjustment valves 1 2 2, respectively. It is.
- the treatment tanks G and H are anaerobic.
- ⁇ Floor tanks are filled with commercially available ground glass and have a particle size of 5 to 15 mm.
- the wastewater passed through these G and H is treated in the aerobic tanks I and J, and then discharged from the treatment tank of K via the circulating water introduction pipe 127 and the flow pump 122 to the G water. It is circulated to the treatment tank.
- K there is a re-anaerobic tank L, which is filled with the same anthracite as G and H.
- the primary treatment water of piggery sewage is passed at a flow rate of 600 days from the sewage introduction pipe 125 to The circulation was 540 days, and the nitrogen concentration in the sewage was high, so the BOD source in the sewage was not sufficient for the denitrification effect.
- the wastewater is treated for about 6 months, and the ⁇ ⁇ , transparency, and BOD of the primary treated water and the treated liquid discharged from the treated discharge pipe 126 are treated at this time.
- SS, T-P and T-N were measured respectively.
- the results are shown in Figure 15. As is clear from the figure, according to the present example, the organic matter, phosphorus and nitrogen in the Takubaku sewage were reliably removed over a long period of time. Considering the results of 1 and 2 in more detail, ⁇ o
- the main component is tobamolite having a particle size of 5 to 8 mm, manufactured in the same manner as in the above manufacturing example (6).
- the contact material is 400 X 400 X 800
- the demineralization tank of mm was filled with 100. And passing water treated at a flow rate of this Monuke re down tank of pigpen wastewater primary treatment water upflow 1 2 0 Bruno ⁇ (1. 2 t Roh ⁇ m 3) (flow rate). For about 7 months, the concentration of wastewater from swine sewage and treated water was measured, and the results are shown in Figure 16.
- the rinsing degree of the treated water was 3 ppm or less without being affected by the phosphorus concentration of the Takubaku sewage. According to the method of the present invention, it is stable over a long period of time;
- the method for treating sewage according to the first invention does not require a complicated process, and efficiently removes organic substances, nitrogen and phosphorus efficiently by pure and easy treatment. Because it is easy to maintain and manage, it is particularly suitable for treating highly vague sewage such as livestock urine wastewater treatment and industrial wastewater with high load.
- the porous contact material that has been used for a long period of time and has a reduced processing capacity can be reused as silicate stone-based fertilizer and soil reforming material.
- the method for treating sewage according to the second invention is simple: it can remove phosphorus efficiently and easily and easily, and can be easily maintained and managed. Of course, it is suitable for small- and medium-scale dewatering, which has been difficult until now, such as livestock sewage and domestic wastewater.
- porous contact materials that have been used for a long period of time and have reduced processing capacity can be reused as silicate calcareous fertilizers and phosphatic fertilizers or as raw materials for lin. Wear
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Description
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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DK530287A DK530287A (da) | 1986-02-10 | 1987-10-09 | Fremgangsmaade til behandling af spildevand |
SE9102979A SE9102979L (sv) | 1986-02-10 | 1991-10-14 | Saett att behandla avloppsvatten |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
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JP61/25948 | 1986-02-10 | ||
JP2594886A JPS62183898A (ja) | 1986-02-10 | 1986-02-10 | 汚水の脱リン材 |
JP61/168031 | 1986-07-18 | ||
JP61168031A JPS6328496A (ja) | 1986-07-18 | 1986-07-18 | 水浄化材及びこれを利用する有機性汚水の処理方法 |
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WO1987004695A1 true WO1987004695A1 (en) | 1987-08-13 |
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PCT/JP1987/000080 WO1987004695A1 (en) | 1986-02-10 | 1987-02-09 | Process for treating waste water |
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US (1) | US4917802A (ja) |
AU (1) | AU595013B2 (ja) |
CH (1) | CH670627A5 (ja) |
DE (1) | DE3790061T1 (ja) |
DK (1) | DK530287A (ja) |
GB (1) | GB2196955B (ja) |
NL (1) | NL8720037A (ja) |
SE (2) | SE466445B (ja) |
WO (1) | WO1987004695A1 (ja) |
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DE102011016826A1 (de) * | 2011-04-12 | 2012-10-18 | Karlsruher Institut für Technologie | Anlage und Verfahren zur Phosphorrückgewinnung aus Abwasser |
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SE468985B (sv) * | 1990-09-07 | 1993-04-26 | Johnson Axel Eng Ab | Foerfarande foer rening av avloppsvatten |
US5160043A (en) * | 1991-09-09 | 1992-11-03 | I. Kruger, Inc. | Method of exhausting dissolved oxygen in a nitrogen removal wastewater treatment process |
AT400711B (de) * | 1992-08-24 | 1996-03-25 | Karlsreiter Herbert | Biogasanlage |
FR2719303B1 (fr) * | 1994-04-29 | 1996-07-26 | Rhone Poulenc Chimie | Agent de captation de cations de métaux lourds comprenant un composé du type silicate ou aluminosilicate ou un composé du type carbonate et un support. |
US5678233A (en) * | 1994-09-14 | 1997-10-14 | Brown; Paul W. | Method of immobilizing toxic or radioactive inorganic wastes and associated products |
JPH08108039A (ja) * | 1994-10-11 | 1996-04-30 | Netsushii Kogyo Kk | 排ガス処理装置 |
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- 1987-02-09 AU AU70206/87A patent/AU595013B2/en not_active Ceased
- 1987-02-09 GB GB8722169A patent/GB2196955B/en not_active Expired - Lifetime
- 1987-02-09 NL NL8720037A patent/NL8720037A/nl not_active Application Discontinuation
- 1987-02-09 DE DE19873790061 patent/DE3790061T1/de not_active Withdrawn
- 1987-02-09 WO PCT/JP1987/000080 patent/WO1987004695A1/ja active Application Filing
- 1987-10-09 DK DK530287A patent/DK530287A/da not_active Application Discontinuation
- 1987-10-09 SE SE8703919A patent/SE466445B/sv not_active IP Right Cessation
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Also Published As
Publication number | Publication date |
---|---|
CH670627A5 (ja) | 1989-06-30 |
AU7020687A (en) | 1987-08-25 |
NL8720037A (nl) | 1988-01-04 |
SE9102979D0 (sv) | 1991-10-14 |
DK530287D0 (da) | 1987-10-09 |
GB2196955A (en) | 1988-05-11 |
GB2196955B (en) | 1990-10-17 |
AU595013B2 (en) | 1990-03-22 |
DE3790061T1 (ja) | 1988-03-31 |
SE8703919L (sv) | 1987-10-09 |
SE9102979L (sv) | 1991-10-14 |
US4917802A (en) | 1990-04-17 |
SE8703919D0 (sv) | 1987-10-09 |
DK530287A (da) | 1987-10-09 |
SE466445B (sv) | 1992-02-17 |
GB8722169D0 (en) | 1987-10-28 |
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