CN111499101A - Complicated organic sewage step purifier - Google Patents

Complicated organic sewage step purifier Download PDF

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CN111499101A
CN111499101A CN202010342295.6A CN202010342295A CN111499101A CN 111499101 A CN111499101 A CN 111499101A CN 202010342295 A CN202010342295 A CN 202010342295A CN 111499101 A CN111499101 A CN 111499101A
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tank
agglomeration
sewage
organic sewage
return
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CN111499101B (en
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陈润华
柴喜林
查从品
毛攀
周传国
江红波
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Jiangxi Wannian Zhongnan Environmental Protection Industry Co Operative Research Institute Co ltd
Central South University of Forestry and Technology
Jiangxi Gaia Environmental Science and Technology Co Ltd
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Jiangxi Wannian Zhongnan Environmental Protection Industry Co Operative Research Institute Co ltd
Central South University of Forestry and Technology
Jiangxi Gaia Environmental Science and Technology Co Ltd
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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
    • C02F1/001—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
    • C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—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
    • 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
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281—Installations for water purification using chemical agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/20—Heavy metals or heavy metal compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/043—Treatment of partial or bypass streams
    • 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
    • C02F3/005—Combined electrochemical biological processes
    • 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
    • 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

Abstract

The invention provides a complicated organic sewage step purification device, and belongs to the field of wastewater treatment. The device comprises an agglomeration reaction tank, a flocculation settling tank, an anoxic biochemical tank, an anaerobic phosphorus removal tank, a jet flow reactor, an aeration nitrification tank and a related reflux device. The device has the advantages of effectively improving the agglomeration performance of sludge flocculating particles in sewage, reducing microorganism poisoning in biochemical regions, preventing suspended particles from blocking the packing layer and the like, thereby realizing the standard discharge of complex organic sewage with low biochemical rate and multiple impurities with high efficiency, energy conservation and low cost, and being a water purifying device with economy, feasibility, stable performance and high water purifying efficiency.

Description

Complicated organic sewage step purifier
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a complicated organic sewage step purification device.
Background
While the agricultural science and technology and the livestock and poultry breeding industry develop at a high speed, a large amount of organic sewage containing complex pollutant components such as antibiotics, heavy metals, suspended particles and the like is generated. The sewage has a plurality of technical difficulties of high chemical oxygen consumption, low biochemical rate, large turbidity, difficult separation and sedimentation and the like. In recent years, water body pollution events caused by the random discharge and accumulation of antibiotics, heavy metals, high chemical oxygen consumption and refractory organic matters are frequent, and prevention and control of black and odorous water body pollution and remediation of organic polluted soil and fields become key problems in the field of environmental research in China.
The basic principle of organic wastewater treatment is oxidative degradation, that is, organic substances in wastewater are oxidized and degraded into small molecules and finally converted into inorganic substances such as carbon dioxide, water and inorganic salts. The existing mainstream method mainly comprises two major types of biodegradation method and chemical oxidation method, wherein biodegradation utilizes the action of microbial flora such as aerobic microorganisms and anaerobic microorganisms to degrade organic pollutants in water, the technology has the characteristics of low cost, large anaerobic bacteria degradation load, high aerobic bacteria efficiency and the like, but the biodegradation technology requires the technical premises of high biochemical rate of organic matters in wastewater, no biological toxicity of wastewater and the like. The chemical oxidation process is a method for rapidly depriving electrons of organic matters after a strong oxidant is contacted with the organic matters so as to reduce the content of the organic matters in a water body through oxidative degradation, and is a rapid and efficient organic wastewater treatment process. Especially aiming at the technical problems that the flocculation particles are difficult to grow up, the microorganism in a biochemical region is poisoned, the suspended particles block a packing layer, the biochemical effect of the wastewater is poor and the like in the treatment process of organic wastewater with low biochemical rate and complex components containing heavy metal impurities and suspended matters.
Disclosure of Invention
Aiming at the problems, the invention provides the complex organic sewage step purification device which is economical, feasible, stable in performance and high in water purification efficiency, so that the agglomeration performance of sludge flocculation particles in sewage is improved, the risks of microbial poisoning and suspended particles blocking a packing layer in a biochemical region are reduced, the treatment stability of a system device is improved, and finally the complex organic sewage with low biochemical rate and multiple impurities is discharged up to the standard at low cost.
The technical scheme provided by the invention is as follows:
the stepped purifier for complicated organic sewage includes the following parts successively from the waste water inlet to the purified water outlet: an agglomeration reaction tank, a flocculation settling tank, an anoxic biochemical tank, an anaerobic phosphorus removal tank and an aeration nitrification tank.
In particular, a jet flow reactor is arranged between the anaerobic dephosphorization tank and the aeration nitrification tank.
Particularly, the agglomeration reaction tank comprises an agglomeration tank filler bed layer, an anoxic biochemical tank return sludge inlet, an aeration nitrification tank return sludge inlet, a medicament inlet and an agglomeration tank turntable connected with a first anode terminal from top to bottom.
Particularly, the device also comprises two anode terminals and a cathode terminal, wherein the first anode terminal is connected with the agglomeration tank turntable, the second anode terminal is connected with the aeration nitrification tank turntable, and the cathode terminal is connected with the anoxic biochemical tank turntable, so that the sludge colloid passing through the turntable is charged correspondingly.
Particularly, the device further comprises a first return pipeline and a second return pipeline, wherein the first return pipeline is connected to a return sludge inlet of the anoxic biochemical tank from the bottom of the anoxic biochemical tank, the return sludge inlet of the anoxic biochemical tank is positioned at an outlet of a packing bed layer of the agglomeration tank of the agglomeration reaction tank, the second return pipeline is connected to a return sludge inlet of the aeration nitrification tank from the bottom of the aeration nitrification tank, and the return sludge inlet of the aeration nitrification tank is positioned in a hydraulic mixing area between the top of a turntable of the agglomeration tank connected with the first anode terminal on the side surface of the agglomeration reaction tank and a medicament inlet.
Particularly, the device also comprises a third return pipeline which is connected from the bottom of the anaerobic dephosphorization tank to a sewage inlet on the side surface of the anoxic biochemical tank and is provided with a one-way valve and/or a return pump to adjust the size of the return flow.
In particular, one or more porous carbon-based composite materials which have multiple pores and are rich in functional groups are filled in the packing bed layer of the agglomeration tank, the packing bed layer of the anoxic tank, the packing bed layer of the anaerobic tank and the packing bed layer of the aeration tank, and preferably, the porous carbon-based composite materials are iron-carbon-based composite materials.
In particular, the porous carbon-based composite material is prepared by adopting fungi hypha composite carbon nano tubes or graphene oxide, performing surface functionalization treatment and then carbonizing at low temperature.
In particular, the apparatus may be provided with a grating at the waste water inlet to initially intercept large particulate matter entering the apparatus.
In particular, the device also comprises an accessory facility, wherein the accessory facility is one or more of a water level control circulating water tank, a solar cell panel and a medicament storage tank.
The invention provides a step purification device for complex organic sewage, which has the following advantages:
1. multi-drive induced enhanced colloid flocculation: PAM and PAC are required to be added in the traditional flocculation sedimentation process and used as floccules to destabilize the colloid, the process destabilizes the colloid by changing the surface electrical property of the micelle, and the stability of the particle micelle is efficiently destroyed and rapidly grown up by inducing crystallization of sludge with positive charges on the surface of an aeration nitrification tank, sludge with negative charges on the surface of an anoxic biochemical tank and the micelle with positive charges in the wastewater under the driving of a flocculation reaction tank rotating disc. The colloid is destabilized by changing the surface electrical property, so that the secondary pollution of an external medicament to the water body is reduced, and the energy consumption is reduced.
2. The jet electrode is cooperated with oxygenation to improve degradation efficiency: the traditional aeration oxygenation technology has high energy consumption and low air utilization rate. The process improves the utilization efficiency of oxygen by adopting the synergistic effect of jet flow oxygenation and water electrolysis of the aeration tank turntable. The negative pressure of the front-end pump of the ejector sucks oxygen into water and bubbles generated by water electrolysis have strong chemical reaction activity, a large amount of formed micro bubbles can rapidly improve the dissolved oxygen value in water, the strong chemical activity is obtained, a large amount of micro bubbles are also generated, and the jet aerator is high in efficiency, low in noise and low in energy consumption.
3. Strong impact resistance to heavy metal ions: the traditional biological treatment process is difficult to resist the impact of toxic substances such as heavy metals and the like, and has poor wave resistance. The process comprises a porous carbon-based composite material filler bed layer rich in functional groups, wherein the surface of the porous carbon-based material is rich in a large number of chemical groups such as hydroxyl, carboxyl, amino, sulfydryl and the like, and can form stable matched bonds with heavy metals, so that the heavy metals can be effectively intercepted at the front section of a biochemical treatment process, and the subsequent treatment risk is reduced.
4. The process stability is high: the process designs a multi-backflow pipeline system and a multi-electrode induction and transmission system, wherein the multi-backflow pipeline improves the sedimentation performance of the flocculating particles, so that the sludge of the system is discharged from the only outlet at the bottom of the flocculation sedimentation tank, and meanwhile, the circulation of microorganisms is more stable. The multi-electrode induction and transfer system not only provides colloidal particles with different charges on the surface for flocculation and sedimentation of the system, but also can strengthen a reducing system of anaerobic and anoxic reactions in the cathode region and strengthen an oxidizing system of aerobic reactions in the anode region. In addition, the traditional anaerobic-aerobic process adopts an AAO process, namely anaerobic, anoxic and aerobic. The process adopts anoxic, anaerobic and aerobic processes, and the anaerobic section is arranged at the middle stage, so that the stability of the process is effectively ensured.
5. The biochemical reaction efficiency is high: the process design adopts a porous carbon-based composite material, the carbon nano tube or graphene oxide is compounded by fungal hypha, the carbon nano tube or graphene oxide is prepared, the surface is treated and then the carbon material is carbonized at low temperature, and the carbon material prepared by the process has high surface porosity and is rich in a large number of organic groups such as hydroxyl, carboxyl, amino and the like. Compared with the traditional process, the packed bed adopts the activated carbon and the zeolite as the packing, and the specific surface area is smaller. The process uses porous carbon-based composite material with specific surface area over 200m3The/g can provide more microbial reaction sites, and the biochemical reaction efficiency of the packed bed is enhanced. Particularly, the porous carbon-based composite material can be selected from a porous iron-carbon-based composite material, the iron-carbon-based composite material is a composite of carboxyl iron, hydroxyl iron, amino iron, mercapto iron and zero-valent iron which are combined with surface groups of the carbon-based material in various forms, the iron-carbon-based composite material can effectively adsorb refractory organic matters at the tail end of organic wastewater treatment, and inorganic components can be provided for growth activities of microorganisms attached to the iron-carbon-based composite material, so that the water purification efficiency is higher, and the biochemical reaction is more stable; simultaneously has better degradation effect: the main principle of the method is that hydroxyl free radicals can be generated by a micro-battery structure formed between iron and carbon, the generated hydroxyl free radicals have extremely strong oxidation performance, and the method can slowly oxidize, degrade and adsorb organic matters on the surface of a material, so that the water purification effect is further improved.
Drawings
FIG. 1 is a schematic view of a complex organic sewage step purifier.
The names corresponding to the reference numbers in the figures are as follows:
1. an agglomeration reaction tank, 2, a flocculation settling tank, 3, an anoxic biochemical tank, 4, an anaerobic phosphorus removal tank, 5, an aeration nitrification tank, 6, a jet flow reactor, 7, a first anode terminal, 8, an inclined tube plate, 9, a cathode terminal, 10, a second anode terminal, 11, an oxygen inlet, 12, an agglomeration tank rotating disc, 13, an anoxic tank rotating disc, 14, an anaerobic tank rotating disc, 15, an aeration tank rotating disc, 16, an agglomeration tank packing bed, 17, an anoxic tank packing bed, 18, an anaerobic tank packing bed, 19, an aeration tank packing bed, 20, a first wastewater pump, 21, a reagent pump, 22, a fourth check valve, 23, a second wastewater pump, 24, a third check valve, 25, a first reflux pump, 26, a second reflux pump, 27, a sludge pump, 28, a first check valve, 29, a second check valve, 30, a fifth check valve, 31, a wastewater inlet, 32, 33, a purified water discharge port, 34. and a waste residue discharge port 35, a third reflux pump.
Detailed Description
For further understanding of the present invention, preferred embodiments of the present invention will be described in further detail below with reference to examples and comparative examples, but the embodiments of the present invention are not limited thereto.
Example 1
The utility model provides a complicated organic sewage step purifier, this device is applicable to the complicated organic sewage such as solid Suspended Solid (SS), ammonia nitrogen organic matter, phosphorus organic matter in the processing waste water, can be applied to scenes such as black and odorous water body treatment and improvement, beasts and birds cultivation waste water treatment, domestic sewage treatment, rural lake water body restoration, have can effectively improve mud flocculation particle reunion performance, reduce biochemical regional microorganism poisoning and prevent that suspended solid particle from blockking advantages such as packing layer, thereby the complicated organic waste water up-to-standard discharge of the many impurity of low biochemical rate of realization of high efficiency energy-conserving and low cost, be an economic feasibility, stable performance, purifier that water purification efficiency is high.
The device, as shown in fig. 1, comprises an agglomeration reaction tank 1, a flocculation settling tank 2, an anoxic biochemical tank 3, an anaerobic phosphorus removal tank 4, a jet flow reactor 6, an aeration nitrification tank 5 and other related components from a wastewater inlet 31 to a purified water discharge outlet 33. Wherein the agglomeration reaction tank 1 comprises an agglomeration tank filler bed layer 16, an anoxic biochemical tank return sludge inlet, an aeration nitrification tank return sludge inlet, a medicament inlet 32, a first anode terminal 7 and a conductive agglomeration tank turntable 12 connected with the first anode terminal 7 from top to bottom respectively; the water inlet of the flocculation settling tank 2 is arranged on one side of the tank body and respectively comprises an inclined tube plate 8 and a sludge hopper from top to bottom; the anoxic biochemical tank 3 comprises an anoxic tank filler bed layer 17, a cathode terminal 9, an anoxic tank rotary table 13 connected with the cathode terminal and a sludge return port at the bottom from top to bottom respectively; anaerobic dephosphorization tank 4 from top to bottom include anaerobic jar filler bed 18, anaerobic jar carousel 14 and bottom sludge recirculation mouth, jet reactor 6 top be oxygen entry 11, aeration nitrification tank 5 from top to bottom arrange mouth 33, aeration tank filler bed 19, second anode terminal 10, the aeration tank carousel 15 that is connected with second anode terminal 10 and the sludge recirculation mouth of bottom for the purified water. In addition, the device also comprises three return pipelines, wherein a first return pipeline is connected to a return sludge inlet of the anoxic biochemical tank at the outlet of the agglomeration tank packing bed layer 16 of the agglomeration reaction tank 1 from the bottom of the anoxic biochemical tank 3, and a first check valve 28 and a first return pump 25 are arranged in the pipeline; a second return pipeline is connected to a return sludge inlet of the aeration nitrification tank of a hydraulic mixing area between the top of a rotary disk 12 of the agglomeration tank connected with the first anode terminal 7 and the medicament inlet 32 on the side surface of the agglomeration reaction tank 1 from the bottom of the aeration nitrification tank 5, and a second check valve 29 and a second return pump 26 are arranged in the pipeline; and a third return pipeline is connected to a sewage inlet on the side surface of the anoxic biochemical tank 3 from the bottom of the anaerobic dephosphorization tank 4, and a third check valve 24 and a third return pump 35 are arranged in the pipeline.
The other related components comprise a waste water inlet 31, a first waste water pump 20, a medicament pump 21, a fourth one-way valve 22, a second waste water pump 23, a sludge pump 27, a fifth one-way valve 30, a waste residue discharge port 34 and other related connecting pipelines.
The process for purifying the complex organic sewage by adopting the complex organic sewage step purification device comprises the following steps:
the complex organic sewage enters the device through a waste water inlet 31 and is pumped into an agglomeration reaction tank 1 through a first waste water pump 20, wherein a grid is arranged at the waste water inlet 31 to primarily intercept large particles entering the system; after entering the aggregation reaction tank 1, sewage is filtered through an aggregation tank filler bed layer 16 filled with porous carbon-based composite materials to slow down heavy metal poisoning in the circulating operation process of a biochemical system, and then is contacted with a conductive aggregation tank turntable 12 connected with a first anode terminal 7, so that electrons on the surface of sludge colloidal particles in the sewage are deprived to enable the surface of the sludge colloidal particles in the sewage to be positively charged. Meanwhile, sludge micelles which are contacted with the anoxic tank rotating disc 13 connected with the cathode terminal 9 and are negatively charged at the bottom of the anoxic biochemical tank 3 are pumped into a backflow sludge inlet of the anoxic biochemical tank on the side surface of the agglomeration reaction tank 1 through a first backflow pipeline provided with a first backflow pump 25 and a first one-way valve 28; sludge micelles which are contacted with the aeration tank rotating disc 15 connected with the second anode terminal 10 and are positively charged at the bottom of the aeration nitrification tank 5 are pumped into a return sludge inlet of the aeration nitrification tank on the side surface of the agglomeration reaction tank 1 through a second return pipeline provided with a second return pump 26 and a second one-way valve 29; the charged sludge micelles are mixed, destabilized and flocculated to grow in the agglomeration reaction tank 1.
A medicament inlet 32 is arranged below the outlet of the packing bed layer 16 of the agglomeration tank 1, and medicaments are pumped into the tank body through a medicament pump 21. The pretreatment agent is selected to be added according to the quality of the sewage, the agent can be selected from one or more of polyacrylamide, polymeric ferric sulfate and polymeric aluminum sulfate to prepare an aqueous solution for the sewage with high colloid content and difficult flocculation and sedimentation, and the agent is selected from one or more of hydrogen peroxide, sodium hypochlorite and sodium chlorate to prepare an aqueous solution for the sewage with low biochemical rate and high chemical oxygen consumption.
The bottom of the agglomeration reaction tank 1 is communicated with a flocculation settling tank 2, sludge micelles after flocculation growth in the agglomeration reaction tank 1 enter the flocculation settling tank 2, the micelles further grow through an inclined tube plate 8 of the flocculation settling tank 2 and are subjected to layer sedimentation through extrusion, and settled sludge enters a sludge hopper and then is discharged into waste residues through a waste residue discharge port 34 through a pipeline provided with a sludge pump 27 and a fifth one-way valve 30, so that most of solid suspended matters in the sewage are effectively removed.
The sewage through the flocculation settling tank 2 enters the side sewage inlet of the anoxic biochemical tank 3 through the fourth one-way valve 22, and is contacted with the anoxic tank rotating disc 13 connected with the cathode terminal 9, so that the residual solid suspended matters in the sewage are negatively charged, and are further settled and separated and enter the agglomeration reaction tank 1 through the first return pipeline, so that the risk of pipeline blockage in the anoxic biochemical, anaerobic phosphorus removal and aeration nitration reaction processes is reduced. The rest sewage passes through the anoxic biochemical tank 3 from bottom to top through the anoxic tank filler bed layer 17 filled with the iron-carbon-based composite material, and is efficiently oxidized and degraded on the surface of the flowing iron-carbon-based composite material.
The sewage after oxidative degradation enters a sewage inlet on the side surface of the anaerobic phosphorus removal tank 4 through an outlet on the top of the anaerobic biochemical tank 3, solid suspended matters in the sewage passing through the anaerobic tank turntable 14 pass through a sludge outlet on the bottom of the anaerobic phosphorus removal tank 4 and flow back to the sewage inlet of the anaerobic biochemical tank 3 through a third return pipeline provided with a third check valve 24 and a third return pump 35, a part of anaerobic bacteria liquid in the anaerobic phosphorus removal tank 4 flows back to the anaerobic biochemical tank 3 through the third return pipeline, the amount of the return flow is adjusted through the check valve and the return pump, and then the number of microorganism populations of the anaerobic and anoxic procedures is adjusted, so that the biochemical reaction efficiency of the anaerobic and anoxic procedure sections is balanced, active bacteria populations in the system keep high degradation activity, strains are saved, and the inactivation caused by the active bacteria populations flowing into the aeration nitrification section is prevented. The rest sewage passes through the anaerobic phosphorus removal tank 4 from bottom to top through the anaerobic tank filler bed layer 18, a large amount of iron-carbon-based composite materials are also arranged in the oxygen tank filler bed layer 18, the iron-carbon-based composite material fluidized bed provides more reaction sites for chemical reaction, and meanwhile, the state of lower dissolved oxygen creates favorable conditions for effectively removing phosphorus in the sewage.
The sewage flows into the aeration nitrification tank 5 through the second waste water pump 23 and the jet flow reactor 6 which are connected by a pipeline at the top of the anaerobic dephosphorization tank 4, wherein the second waste water pump 23 arranged at the front end of the jet flow reactor 6 sucks air into the water through negative pressure to generate a large amount of micro bubbles, so that the dissolved oxygen value in the sewage is rapidly improved, the sewage then enters the aeration nitrification tank 5, and after the sewage is contacted with the aeration tank rotating disc 15 connected with the second anode terminal 10, solid suspended matters in the sewage flow back to the agglomeration reaction tank 1 through a sludge outlet at the bottom of the aeration nitrification tank 5 and a second return pipeline provided with a second check valve 29 and a second return pump 26. The rest sewage passes through the aeration nitrification tank 5 from bottom to top through the aeration tank filler bed layer 19 filled with a large amount of iron-carbon-based composite materials, aerobic bacteria are propagated on the surface of the iron-carbon-based composite materials, dissolved oxygen and organic matters in the sewage are used as self energy, organic matters in the water body are degraded, purified water is obtained, and the purified water is discharged out of the system through the purified water discharge port 33 at the top of the aeration nitrification tank 5.
In addition, some auxiliary facilities can be added according to the actual requirements of the device, for example, a water level control circulating water tank can be added so as to control the submerged position of the device, and a solar cell panel can be added so as to provide electric energy for the device.
The domestic sewage in a certain college area is taken as an example and is treated by the device, so that solid suspended matters and nitrogen and phosphorus organic matters in the sewage are purified, the domestic sewage initially intercepts large granular matters entering the system through a water inlet grid, then the solid suspended matters are removed through an electric auxiliary flocculation and flocculation settling area, the concentration of the solid suspended matters in the sewage after flocculation settling reaches 4-10 mg/L, the removal rate reaches 96.5-98.6%, then the sewage is pumped into a cathode filling area at the bottom of an anoxic biochemical tank to carry out deep solid suspended matters removal, the sewage sequentially passes through an anoxic biochemical tank, an anaerobic phosphorus removal tank and an aeration nitrification tank to carry out nitrogen and phosphorus removal, the temperature of the anoxic-anaerobic-aerobic denitrification and phosphorus removal system is controlled at 20-25 ℃, the Dissolved Oxygen (DO) of the anoxic biochemical tank and the anaerobic phosphorus removal tank is controlled at 0.1-0.5 mg/L, the pH of the inlet water is basically maintained at 7.3-7.6, the ratio of the aeration nitrification tank is controlled at 1-2:1, the dissolved oxygen consumption is controlled at 3-4 mg/L, the hydraulic retention time (T) is 10h, the water quality is treated by the aeration tank, the total ammonia nitrogen and the sewage is purified by the aeration tank, and the total ammonia nitrogen and the residual water is obtained by the aerobic nitrification system, and the total ammonia nitrogen and the sewage is measured.
TABLE 1 Water quality measurement results before and after Sewage treatment
Before treatment After treatment Removal rate
Water temperature (. degree.C.) 15-25 / /
CODcr(mg/L) 200-350(304) 32-54 82.2-89.5％
Solid suspension (SS, mg/L) 150-360(283) 4-10 96.5-98.6％
Ammonia Nitrogen (NH)4 +-N，mg/L) 40-50 0.4-1.9 95.2-99.3％
Total nitrogen (TN, mg/L) 45-60 5.6-9.5 78.9-90.6％
Total phosphorus (TP, mg/L) 4-6 <0.5 87.5-91.7％
According to the data, after the complex organic sewage is treated by the complex organic sewage stepped purification device, the removal rate of indexes such as chemical oxygen consumption, solid suspended matters, ammonia nitrogen, total phosphorus and the like of the effluent is high, and the quality of the effluent stably reaches the national first-class A standard.
Therefore, the device can independently operate in the treatment of small and micro water bodies such as a black and odorous pond and the like, has the circulating water tank of the submerged position of the control device, enables the device to treat pollutants at different depths in the water body, can increase dissolved oxygen in the water body when purifying waste water, can provide electric energy by solar energy in the process, is low in economic energy consumption, can be used for treating the polluted black and odorous water body, and can also operate in the water body of the pond for a long time to reduce the black and odorous risk of the water body. The device has the advantages of effectively improving the agglomeration performance of sludge flocculating particles in sewage, reducing microorganism poisoning in biochemical regions, preventing suspended particles from blocking the packing layer and the like, thereby realizing the standard discharge of complex organic sewage with low biochemical rate and multiple impurities with high efficiency, energy conservation and low cost, and being a water purifying device with economy, feasibility, stable performance and high water purifying efficiency.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The stepped purifier for complicated organic sewage includes the following parts successively from the waste water inlet to the purified water outlet: an agglomeration reaction tank, a flocculation settling tank, an anoxic biochemical tank, an anaerobic phosphorus removal tank and an aeration nitrification tank.
2. The complicated organic sewage stepped purification device as claimed in claim 1, wherein a jet flow reactor is arranged between the anaerobic dephosphorization tank and the aeration nitrification tank.
3. The complicated organic sewage stepped purification device as claimed in claim 1, wherein the agglomeration reaction tank comprises an agglomeration tank filler bed layer, an anoxic biochemical tank return sludge inlet, an aeration nitrification tank return sludge inlet, a medicament inlet, and an agglomeration tank turntable connected with a first anode terminal.
4. A complex organic sewage cascade purification apparatus as claimed in claim 3, further comprising two anode terminals and a cathode terminal, wherein the first anode terminal is connected to the agglomeration tank turntable, the second anode terminal is connected to the aeration nitrification tank turntable, and the cathode terminal is connected to the anoxic biochemical tank turntable, so that the sludge colloid passing through the turntable is charged correspondingly.
5. A complex organic sewage cascade purification device as claimed in claim 4, characterized in that the device further comprises a first return pipe and a second return pipe, wherein the first return pipe is connected from the bottom of the anoxic biochemical tank to the return sludge inlet of the anoxic biochemical tank, which is located at the outlet of the agglomeration tank packing bed of the agglomeration reaction tank, and the second return pipe is connected from the bottom of the aeration nitrification tank to the return sludge inlet of the aeration nitrification tank, which is located in the hydraulic mixing area between the top of the agglomeration tank turntable connected with the first anode terminal and the agent inlet on the side of the agglomeration reaction tank.
6. A complex organic sewage cascade purification device as claimed in claim 3 or 4, characterized in that the device further comprises a third return pipeline which is connected from the bottom of the anaerobic dephosphorization tank to the sewage inlet at the side of the anoxic biochemical tank and is provided with a one-way valve and/or a return pump to adjust the amount of return flow.
7. A complicated organic sewage cascade purification device as claimed in claim 1, wherein the packing bed of the agglomeration tank, the packing bed of the anoxic tank, the packing bed of the anaerobic tank and the packing bed of the aeration tank are filled with one or more porous carbon-based composite materials with porous and rich functional groups, preferably, the porous carbon-based composite materials are iron-carbon-based composite materials.
8. The stepped purification device for complex organic sewage as claimed in claim 7, wherein the porous carbon-based composite material is prepared by performing surface functionalization treatment on a fungus hypha composite carbon nanotube or graphene oxide and then performing low-temperature carbonization.
9. A complex organic sewage cascade purification apparatus as claimed in claim 1, wherein a grating is provided at the waste water inlet to primarily intercept large particles entering the apparatus.
10. The apparatus of claim 1, further comprising an auxiliary facility, wherein the auxiliary facility is one or more of a water level control circulation water tank, a solar cell panel, and a chemical storage tank.
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