CN104045154A - Wastewater biological treatment system based on bio-contact oxidation process - Google Patents
Wastewater biological treatment system based on bio-contact oxidation process Download PDFInfo
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- CN104045154A CN104045154A CN201310077976.4A CN201310077976A CN104045154A CN 104045154 A CN104045154 A CN 104045154A CN 201310077976 A CN201310077976 A CN 201310077976A CN 104045154 A CN104045154 A CN 104045154A
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- 230000008569 process Effects 0.000 title abstract description 29
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- 230000003647 oxidation Effects 0.000 title abstract description 10
- 238000007254 oxidation reaction Methods 0.000 title abstract description 10
- 238000005273 aeration Methods 0.000 claims abstract description 212
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Biological Treatment Of Waste Water (AREA)
Abstract
The invention provides a wastewater biological treatment system based on a bio-contact oxidation process, and belongs to the technical field of wastewater biological treatment. The biological wastewater treatment system includes a processing pool, a water inlet zone, a promote zone, an aeration zone and a slurry and water separation zone; the water inlet zone, the promote zone, the aeration zone and the slurry and water separation zone are integrally arranged in the processing pool, the aeration zone is configured to include a plurality of sub partitions, and a biomembrane filler is placed in each sub partition; two or more of the three of an anoxic zone, an anaerobic zone and an aerobic zone are arbitrarily combined to form the plurality of sub partitions. The biological wastewater treatment system has the advantages of good denitrification effect, high efficiency of sewage treatment, less sludge deposit, wide applicable range, and biological multiplication process.
Description
Technical field
Dirty water living creature processing technique of the present invention field, relate to the integrally sewage biological treatment system in treating pond of inhalant region, lifting zone, aeration zone and mud-water separation district, relate in particular to aeration zone and be divided into a plurality of child partitions and the mid-biofilm packing that is placed with of each child partition to realize the sewage biological treatment system based on Biological Contact Oxidation Process.
Background technology
Water resources is more aobvious important in social development, and people also more and more pay attention to water technology.Wherein, dirty water living creature processing technique is subject to extensive concern and obtains development.
In dirty water living creature processing technique, a kind of typical method is activated sludge process, biological flocculation and precipitation, the adsorption and oxidation effect of the method based on active sludge, to decompose, remove the middle organic pollutant of sewage (or being called waste water) etc., then make mud separated with water, active sludge can recycling.In activated sludge process, wherein important processing parameter is dissolved oxygen (DO, Dissolved Oxygen) concentration and the activated sludge concentration in water.For guaranteeing DO concentration, conventionally in the sewage biological treatment system that adopts activated sludge process, be equipped with corresponding aerating system, to transmit oxygen in the sewage to pending.
Current, biological multiplication (Bio-Dopp) technique is the advanced sewage disposal technology in activated sludge process, it comes from Germany, sewage biological treatment system based on biological multiplication process adopts treating pond, inhalant region, lifting zone, aeration zone and mud-water separation district are all arranged in this treating pond, realize integral structure.Therefore, the floor space based on this sewage biological treatment system is little, and has greatly reduced pipeline investment, and laid down cost is low.And, the aeration zone of the sewage biological treatment system based on biological multiplication process adopts low dissolved axygen (for example 0.3-0.5mg/L) and high reactivity sludge concentration (for example 5-8g/L), to guarantee to realize the denitrogenation processing of synchronous nitration and denitrification, reach good denitrogenation and phosphor-removing effect, reduce sludge output, keep continuing efficient and stable water treatment effect.Chinese Patent Application No. is that CN200810114904.1, name are called in the patent of " bio sewage treating process and device ", discloses the similar above-mentioned sewage biological treatment system based on biological multiplication process.
But, in the sewage biological treatment system based on biological multiplication process, not only require aeration efficiency high, and require in aeration zone DO concentration even; Between low dissolved axygen aeration and high reactivity sludge concentration, easily produce contradiction.For example, for meeting low dissolved axygen, it is low that aeration produces power, and sludge settling easily occurs the active sludge of high-content, thereby easily cause sludge concentration to reduce, affect treatment effect, and sedimentation mud also can affect the work (for example causing aeration tube to stop up) of the aeration tube of bottom, aeration zone; If increasing aeration rate, easily causes again nitric efficiency not high.Therefore, the sewage biological treatment system based on biological multiplication process is in concrete application, and the realization of its engineering effort depends on the advanced aeration process of aeration zone very much, the aeration tube technology that especially arrange bottom, aeration zone, and denitrification effect is limited.For ammonia nitrogen in high density (NH
3-N) sewage (such as Urethane Elastic Fibre Producing Waste Water, leather-making waste water etc.) is processed, or the fore-end sewage ammonia nitrogen content of aeration zone is when higher, and denitrification effect aspect is difficult to up to standard.
Further, the sewage biological treatment system based on biological multiplication process of prior art is owing to depending on very much the advanced aeration process of aeration zone so that the DO concentration of aeration zone evenly and stably maintains lower level, for example, aeration tube used thickness is the aeration flexible pipe of 0.3-0.7mm only, solarization air cap size is controlled at 1mm left and right, every meter of aeration tube is covered with at least 2000 solarization air caps, many aeration tubes with adjacent spacing 80-300mm in aeration zone longitudinally (being basically parallel to water (flow) direction) arranged at the bottom of pond.Chinese Patent Application No. is that CN200820108555.8, name are called in the patent of " a kind of aerating apparatus " and disclose a kind of like this aeration process.But, engineering practice reflection, the cost of this aerating system (especially aeration tube) is very high.
In view of this, be necessary to propose a kind of novel sewage biological treatment system.
Summary of the invention
One of object of the present invention is, at least improves the sewage water denitrification effect of sewage biological treatment system.
Another object of the present invention is, reduces the dependence of sewage biological treatment system to advanced Air Exposure technology, further reduces the cost of sewage biological treatment system.
For realizing above object or other objects, the invention provides a kind of sewage biological treatment system, it comprises treating pond and is integrally arranged on inhalant region, lifting zone, aeration zone and the mud-water separation district in described treating pond; Described aeration zone is configured to comprise a plurality of child partitions, the mid-biofilm packing that is placed with of each child partition; Wherein, described a plurality of child partition is both or both the above arbitrary combination in anaerobic zone, oxygen-starved area and aerobic zone three.
According to the sewage biological treatment system of one embodiment of the invention, wherein, between a plurality of child partitions in described aeration zone, can isolate by the first partition wall practical function.
In the sewage biological treatment system of described embodiment before, described in each, in the first partition wall, be provided with flow passage.
According to the sewage biological treatment system of further embodiment of this invention, wherein, by controlling the aeration efficiency of each child partition so that described aeration zone is configured to comprise a plurality of described child partitions.
In the sewage biological treatment system of described arbitrary embodiment before, selectively, in described anaerobic zone and/or described oxygen-starved area, submersible agitator is set, aerator is set in described aerobic zone and carries out aeration.
In the sewage biological treatment system of described arbitrary embodiment before, selectively, corresponding the first aerating system, the second aerating system and the 3rd aerating system that can distinguish independent control that be provided with respectively in described anaerobic zone, oxygen-starved area and aerobic zone; The aeration rate of controlling described the 3rd aerating system is greater than the aeration rate of described the second aerating system, and the aeration rate of controlling described the second aerating system is more than or equal to the aeration rate of the first aerating system.
Further, the water (flow) direction that the aeration of the aeration tube of the aeration tube of the first aerating system, the second aerating system and the 3rd aerating system supervisor is all basically perpendicular in aeration zone is arranged.
Further, the aerator of the first aerating system, the second aerating system and the 3rd aerating system can be perforated pipe, spiral aerator, middle micro-hole aerator or microporous hose.
Further, the aperture of the solarization air cap of the aeration flexible pipe of described the 3rd aerating system is less than or equal to 5mm, and every meter of aeration flexible pipe is covered with at least 200 described solarization air caps.
In the sewage biological treatment system of described arbitrary embodiment before, selectively, the water (flow) direction that the aeration branch pipe of described aeration zone is basically parallel in aeration zone is arranged in described treating pond, described aeration branch pipe comprises first part, second section and the third part that corresponds respectively to anaerobic zone, oxygen-starved area and aerobic zone, the aeration rate of described third part is higher than the aeration rate of described second section, and the aeration rate of described second section is greater than the aeration rate of described first part.
Further, the solarization air cap quantity that the first part of described aeration flexible pipe arranges is less than density and/or the aperture of the solarization air cap that the second section of described aeration flexible pipe arranges, density and/or the aperture of the solarization air cap that the second section that the density of the solarization air cap of the third part setting of described aeration flexible pipe and/or aperture are greater than described aeration flexible pipe arranges.
Further, described aeration flexible pipe is the aeration flexible pipe that thickness is not limit, and the aperture of the solarization air cap of this aeration flexible pipe is less than or equal to 5mm; In the third part of described aeration tube, every meter of aeration tube is covered with at least 200 described solarization air caps.
In the sewage biological treatment system of described arbitrary embodiment before, preferably, described biofilm packing is denitrogenation filler.
Preferably, described denitrogenation filler snakelike arranging in described child partition arranges.
Preferably, the spacing between described denitrogenation filler is 80mm to 250mm.
In the sewage biological treatment system of described arbitrary embodiment before, the dissolved oxygen concentration of described anaerobic zone is 0-0.2mg/L, and the dissolved oxygen concentration of described oxygen-starved area is 0-0.5mg/L, and the dissolved oxygen concentration of described aerobic zone is 0.3-8.0mg/L.
In the sewage biological treatment system of described arbitrary embodiment before, the activated sludge concentration being fixed on described biofilm packing in described aeration zone is 5g/L to 40g/L.
Preferably, the activated sludge concentration being suspended in sewage in described aeration zone is 2g/L-5g/L.
In the sewage biological treatment system of described arbitrary embodiment before, preferably, in described lifting zone, be provided with air plug-flow system, described air plug-flow system passes into air so that the liquid level of described lifting zone promotes by the aerating system of described sewage biological treatment system.
Further, between described aeration zone and described lifting zone, the second partition wall is set, the height of described the second partition wall is lower than the height of the liquid level being raised of described lifting zone.
Further, the difference of altitude of the height of the liquid level being raised and the height of described the second partition wall of described lifting zone is set, to control plug-flow to the flow stream velocity of described aeration zone.
In the sewage biological treatment system of described arbitrary embodiment before, preferably, described mud-water separation is provided with sludge-water separating system in district, and described sludge-water separating system comprises two the 3rd partition walls of inclination, between two the 3rd partition walls, puts a plurality of precipitation fillings.
In the sewage biological treatment system of described arbitrary embodiment before, alternatively, described a plurality of child partition is followed successively by anaerobic zone, oxygen-starved area and aerobic zone according to water (flow) direction, or be anaerobic zone and aerobic zone, or be oxygen-starved area and aerobic zone, or be anaerobic zone, oxygen-starved area, aerobic zone, oxygen-starved area and aerobic zone, or be oxygen-starved area, aerobic zone, oxygen-starved area and aerobic zone.
In the sewage biological treatment system of described arbitrary embodiment before, preferably, the handled sewage of described sewage biological treatment system is: the chemical oxygen demand (COD) of sewage is more than or equal to 6000 mg/L, and the ammonia nitrogen concentration of sewage is more than or equal to 200mg/L.
Technique effect of the present invention is, by aeration zone being divided to a plurality of child partitions and at the mid-biofilm packing of putting of child partition, can effectively solve in Bio-Dopp technique the contradictory problems aspect denitrification effect between low DO concentration and high sludge concentration, on the one hand, be suitable for carrying out the synchronous nitration and denitrification denitrogenation processing of (comprising omnidistance synchronous nitration and denitrification), greatly improve denitrogenation processing effect; On the other hand, biofilm packing can cause effective active sludge concentration greatly to improve, and the activated sludge concentration of suspension can effectively reduce, and can avoid sludgd deposition and greatly reduce sludge volume, and system running maintenance is easier; On the one hand, can carry out efficient oxidation processing to the organism in sewage again; Another aspect also, denitrification effect does not mainly depend on the aeration tube performance of aerating system, can greatly reduce the aeration tube cost of aerating system, thereby reduces the construction cost of sewage biological treatment system; Another aspect again, each child partition easily combines according to pending sewage situation, thereby combines various bioprocess technologies, and accessible sewage is many and effective.And, the advantage that floor space is little, pipe-line construction cost is low, operation expense is low that this sewage biological treatment system has Bio-Dopp technique concurrently.
accompanying drawing explanation
From following detailed description by reference to the accompanying drawings, will make above and other object of the present invention and advantage more completely clear, wherein, same or analogous key element adopts identical label to represent.
Fig. 1 is the floor plan schematic diagram according to the sewage biological treatment system of one embodiment of the invention.
Fig. 2 is the A-A cross section structure schematic diagram of the sewage biological treatment system of Fig. 1 embodiment.
Fig. 3 is the B-B cross section structure schematic diagram of the sewage biological treatment system of Fig. 1 embodiment.
Fig. 4 is the floor plan schematic diagram according to the sewage biological treatment system of further embodiment of this invention.
Fig. 5 is the principle of work schematic diagram of the sewage biological treatment system of Fig. 1 and Fig. 4 embodiment.
Embodiment
What introduce below is some in a plurality of possibility embodiment of the present invention, aims to provide basic understanding of the present invention, is not intended to confirm key of the present invention or conclusive key element or limits claimed scope.Easily understand, according to technical scheme of the present invention, do not changing under connotation of the present invention other implementations that one of ordinary skill in the art can propose mutually to replace.Therefore, following embodiment and accompanying drawing are only the exemplary illustrations to technical scheme of the present invention, and should not be considered as of the present invention all or be considered as the restriction of technical solution of the present invention or restriction.
In description below, clear and simple and clear for what describe, all parts shown in figure are not described.Shown in the drawings of a plurality of parts, provide the disclosure that can realize completely of the present invention for those of ordinary skills.To those skilled in the art, it is all familiar and obvious being permitted multipart operation.
Figure 1 shows that the floor plan schematic diagram according to the sewage biological treatment system of one embodiment of the invention.The sewage biological treatment system 10 of this embodiment comprises that a treating pond 11(also can be called biochemical treatment tank), in treating pond 11, the sewage passing into (or pending sewage) carries out exporting clear water after purifying treatment in treating pond 11.Be similar to Bio-Dopp technique ground, treating pond 11 comprises that inhalant region 13, lifting zone 15, aeration zone 17(also can be called biochemical reaction zone) and mud-water separation district 19, inhalant region 13, lifting zone 15,17He mud-water separation district, aeration zone 19 are integrally arranged in this treating pond 11, aeration zone 17 is mid-be placed with in some biofilm packing 178(Fig. 1 not shown).In this embodiment, aeration zone 17 comprises three child partitions, be oxygen-starved area 171,172He aerobic zone, anaerobic zone 173, each child partition can complete a kind of biological treatment (will describe thereafter) accordingly, processed sewage (being generally mud mixture) flows into mud-water separation district 19, to isolate clear water and active sludge, clear water is 19 outflows from mud-water separation district.It is pointed out that according to specific needs, the clear water of outflow also can also carry out other water treatment procedures.
In embodiments of the present invention, the shape for the treatment of pond 11 can be, but not limited to as rectangle, can for example, according to concrete situation (, the land used of sewage biological treatment system restriction) its shape, area etc. be set, treating pond 11 in advance moulding is manufactured, and also can form with the mixed earth material site operation construction of reinforcing bar, in treating pond 11, can partly keep apart to form inhalant region 13 as shown in Figure 1 by partition wall, lifting zone 15, 19Deng functional zone, 17He mud-water separation district, aeration zone, certainly, according to biological sewage treatment principle (as shown in Figure 3) inhalant region 13, lifting zone 15, between 17He mud-water separation district, aeration zone 19, can be provided with corresponding water stream channel, the pending sewage inhalant region 13 of can flowing through successively, lifting zone 15, 17He mud-water separation district, aeration zone 19, but inhalant region 13, lifting zone 15, the particular location of 17He mud-water separation district 19, aeration zone in treating pond 11 arranged neither be restrictive (for example sewage biological treatment system 20 of another embodiment as shown in Figure 4).
Figure 2 shows that the A-A cross section structure schematic diagram of the sewage biological treatment system of Fig. 1 embodiment.Shown in Fig. 1 and Fig. 2, particularly, sewage enters in inhalant region 13 by inlet flume (not shown), in inhalant region 13, be provided with the sludge reflux passage (not shown) being communicated with mud-water separation district 19, precipitating sludge in mud-water separation district 19 at least can partly be back in inhalant region 13, precipitating sludge is mainly active sludge, and its carrier as microbial bacteria backflows and can in upper once effluent cycle treating processes, again utilize to inhalant region 13.It will be appreciated that, sewage, before entering inhalant region 13, can carry out pretreated other water treatment procedures; The kind of sewage is not restrictive, for example, can be sanitary sewage, can also be ammonia nitrogen in high density (NH
3-N) Urethane Elastic Fibre Producing Waste Water, leather-making waste water etc.
Between 13He lifting zone, inhalant region 15, by partition wall 135, isolate, in the bottom of partition wall 135, be provided with water entry, sewage can flow into lifting zone 15 smoothly by water entry.Lifting zone 15 is mainly used in pending sewage to carry out water distribution uniformity plug-flow to aeration zone 17.In this embodiment, lifting zone 15 mainly utilizes gas lift principle to promote water inlet, particularly, the bottom of lifting zone 15 is provided with air plug-flow system 151, air plug-flow system 151 can be by aerating system 175(as shown in Figure 2) pass into pressurized air, thereby a large amount of bubbles of emerging make the sewage of lifting zone 15 form mixing wastewater with air, the volume of the sewage of lifting zone 15 increases and causes its liquid level 159 higher than the height of partition wall 157, also higher than the height of the liquid level 179 of aeration zone 17; Therefore, the sewage of lifting zone 15 is ceaselessly routed up partition wall 157 and is flow to aeration zone 17.Partition wall 157 is for isolating 17Liang Ge functional zone, 15He aeration zone, lifting zone, and the area of space between partition wall 157 and partition wall 135 is defined as lifting zone 15, and the bubble that air plug-flow system 151 is emerged and sewage mix in this region.The height of partition wall 135 is higher than the height of liquid level 159, and the height of partition wall 157, lower than the height of liquid level 159, can utilize so the poor water conservancy of liquid level and realize plug-flow.In this embodiment, the liquid level that air plug-flow system 151 can be controlled between liquid level 159 and liquid level 179 is poor, for example, regulates air capacity and air inflow velocity, therefore, air plug-flow system 151 can also control plug-flow to aeration zone 17 flow stream velocity.
In aeration zone 17, be provided with in biofilm packing 178(Fig. 1 not shown), and, aeration zone 17 is divided into a plurality of child partitions, in this embodiment, child partition is respectively anaerobic zone 171,172He aerobic zone, oxygen-starved area 173, and each child partition is provided with biofilm packing 178 in (anaerobic zone 171,172Huo aerobic zone, oxygen-starved area 173).In one example, between child partition, by partition wall practical function, isolate, for example, between 171He oxygen-starved area, anaerobic zone 172, partition wall 1712 is set, between 172He aerobic zone, oxygen-starved area 173, partition wall 1723 is set.It will be appreciated that, partition wall 1712, partition wall 1723 can't stop current mobile according to direction as shown in the figure, it is mainly that the DO concentration between child partition can generally be distinguished, for example, the height of partition wall 1712, partition wall 1723 can be lower than the height of the liquid level 179 of aeration zone 17, in partition wall 1712, partition wall 1723, also flow passage can be set, even, in the situation that the height of partition wall 1712, partition wall 1723 is equal to or higher than the height of liquid level 179, can adopt air lift mode to promote current mobile by direction as shown in the figure between each subregion.
In a further example, partition wall (as partition wall 1712 and 1723) can be set between anaerobic zone 171,172He aerobic zone, oxygen-starved area 173 to be distinguished, it is mainly generally distinguished by DO concentration difference, in this case, it will be appreciated that, between each child partition, do not have strict boundary, between child partition, can have less zone of transition, the DO concentration of zone of transition is between the DO concentration of two adjacent child partitions; Division between child partition in aeration zone can be passed through entity apparatus (for example divider wall) and realize, and also can divide to realize by virtualization (for example main body difference based on DO concentration).
In this example, aeration zone 17 also comprises aerating system 175, and aerating system 175 not only can be blown to air plug-flow system 151, and can make the air little bubble of emerging in the aeration tube of aerating system 175, to transmit oxygen in the sewage to aeration zone 17.Aerating system 175 is divided into a plurality of parts that can distinguish independent control according to child partition correspondence, for example, aerating system 175 comprises the first aerating system 175A, the second aerating system 175B and the 3rd aerating system 175C, the first aerating system 175A comprises that correspondence is arranged on the aeration tube 176A of the bottom of anaerobic zone 171, the second aerating system 175B comprises that correspondence is arranged on the aeration tube 176B of the bottom of oxygen-starved area 172, and the 3rd aerating system 175C comprises that correspondence is arranged on the aeration tube 176C of the bottom of aerobic zone 173.Aeration tube 176A, 176B and 176C make progress aeration to transmit oxygen in aeration zone, by controlling respectively the first aerating system 175A, the second aerating system 175B and the 3rd aerating system 175C, can regulate respectively the aeration rate (aeration rate of aeration tube 176C is greater than the aeration rate of aeration tube 176B, the aeration rate of aeration tube 176B is greater than the aeration rate of aeration tube 176A) of controlling aeration tube 176A, 176B and 176C, thereby make the DO concentration difference alienation in 17th district, aeration zone and be configured to anaerobic zone 171,172He aerobic zone, oxygen-starved area 173; In this embodiment, the dissolved oxygen concentration of anaerobic zone 171 is 0-0.2mg/L, and the dissolved oxygen concentration of oxygen-starved area 172 is 0-0.5mg/L, and the dissolved oxygen concentration of aerobic zone 173 is 0.3-8.0mg/L.When normal work, the aeration rate of aeration tube 176A can be zero.
Biofilm packing 178 in each subregion of aeration zone 17 can be used as microorganism carrier, biofilm packing 178 can form the active sludge suspending partly fixing to form microbial film thereon, thereby fixing sludge concentration is greater than the sludge concentration of suspension, Bio-Dopp technique than prior art, on the one hand, activated sludge concentration improves greatly, for example, be fixed on activated sludge concentration on biofilm packing 178 can reach after 5 g/L-40g/L(process by Equivalent Calculation obtain), the activated sludge concentration being suspended in sewage for example can reach 2g/L-5g/L(, 3g/L-4g/L), (for example can more effectively remove like this pollutent in sewage, little in the DO of anaerobic zone and oxygen-starved area concentration, its total nitrogen removal effect can improve greatly), on the other hand, the sludgd deposition of also avoiding, sludge volume also can greatly reduce, and sludgd deposition is little to the influence on system operation of sewage biological treatment system 10, more easily safeguards.Especially outstanding is, in aeration zone 17, be divided into after a plurality of child partitions, each child partition can be controlled the different DO concentration of configuration, do not need completely as DO concentration being controlled at equably in the Bio-Dopp technique of prior art to a certain low strength range to complete nitration denitrification reaction, a plurality of child partitions can flexible combination carry out multiple bioprocess technology, for example, in 171He oxygen-starved area, anaerobic zone 172, its DO concentration is lower, and biofilm packing 178 causes activated sludge concentration very high, be very suitable for carrying out the synchronous nitration and denitrification denitrogenation processing of (comprising omnidistance synchronous nitration and denitrification), in 171He oxygen-starved area, anaerobic zone 172, can complete preferably denitrogenation processing, in aerobic zone 173, its DO concentration is high, and biofilm packing 178 also causes activated sludge concentration very high, effective to the organic oxide treatment in sewage, therefore solved well low DO concentration and the limited problem of high reactivity sludge concentration denitrification effect that condition causes in the Bio-Dopp technique of prior art.
In this embodiment, sewage biological treatment system 10 can be processed the Demand such as COD(Chemical Oxygen, chemical oxygen demand (COD) completely) more than 6000 or 6000 mg/L, ammonia nitrogen (NH
3-N) concentration is processed at 200mg/L or ammonia nitrogen waste water more than 200mg/L, for example, and garbage leaching liquid, leather-making waste water, Urethane Elastic Fibre Producing Waste Water etc.And this sewage biological treatment system based on Bio-Dopp technique that is prior art can not be accomplished completely.
Need to further understand that, in aeration zone 17, being set to a plurality of child partition juxtapositions puts after biofilm packing 178, if need to be in large aeration zone 17(Bio-Dopp technique aeration zone area very large) in efficiently, aeration is to maintain the homogeneity of DO concentration equably, and then reduced the dependence to the aeration tube technology of aerating system, for example, in this embodiment, aeration tube 176A, 176B and/or 176C can select perforated pipe, and (material is selected optional PVC, carbon steel, glass reinforced plastic, UPVC, ABS etc.), spiral aerator, the simple aeration devices such as middle micro-hole aerator or microporous hose, the thickness of the aerator of the 3rd aerating system (for example aeration flexible pipe) is not restrictive, like this, can greatly reduce the cost of aeration tube, even in the situation that increasing biofilm packing 178, partition wall 1712 and 1723, also can reduce the construction cost of sewage biological treatment system 10.
Certainly, less demanding but require to reduce aeration energy consumption and improve in the inhomogeneity situation of DO concentration in construction cost, also can select to apply Chinese Patent Application No. is that CN200820108555.8, name are called the aerating apparatus of " a kind of aerating apparatus ", particularly the aeration tube 176C of aerobic zone 173 correspondences, can select to apply such aerating apparatus.The mode that patent CN200820108555.8 can quote in full comprises therewith.
It will be appreciated that, at each child partition of aeration zone 17, insert after biofilm packing 178, although greatly increased the concentration of active sludge by being fixed on microbial film on filler, in the sewage of each child partition, existed and be suspended in the active sludge in sewage more or less; Therefore, the active sludge suspending on the one hand can the activated sludge process based on traditional definition carry out sewage disposal, but prior one side is that the biofilm packing 178 of inserting causes mainly based on biological contact oxidation process, carrying out sewage disposal in aeration zone 17.
In a preferred embodiment, biofilm packing 178 can be chosen as denitrogenation filler, like this, can utilize the efficient denitrification effect of denitrogenation filler, further improves the denitrification effect of aeration zone 17.The particular type of biofilm packing 178 can be other efficient denitrification fillers, such as, can apply Chinese Patent Application No. is CN201010576296.3, name is called the filler disclosing in " a kind of stiffening web type filler " patent, also can apply Chinese Patent Application No. is CN201010576259.2, name is called the filler disclosing in " a kind of spiral filler " patent, can also apply Chinese Patent Application No. is CN201010576284.0, name is called the filler disclosing in " a kind of compact support type packing " patent, can also apply Chinese Patent Application No. is CN201010576283.6, name is called the filler disclosing in " a kind of dendritic filler " patent.
Denitrogenation filler can be, but not limited to arrange with snakelike arranging in each child partition of aeration zone 17, and the spacing between denitrogenation filler can be, but not limited to as 80mm to 250mm.
It will be appreciated that, Fig. 1 and embodiment illustrated in fig. 2 in, aerating system is divided into three parts, the first aerating system 175A, the second aerating system 175B and the 3rd aerating system 175C, the independent aeration rate of controlling them is divided into anaerobic zone 171,172He aerobic zone, oxygen-starved area 173 by aeration zone 17 configurations respectively; The aeration tube 176C of the aeration tube 176B of the aeration tube 176A of the first aerating system 175A, the second aerating system 175B and the 3rd aerating system 175C is all that the water (flow) direction (direction as shown in arrow in aeration zone) that is basically perpendicular to aeration zone 17 is arranged abreast, easy like this aeration tube of corresponding section is controlled separately to aeration rate, convenient configuration forms child partition.In another embodiment, in its aerating system, the water (flow) direction that also aeration tube of aeration zone can be basically parallel in aeration zone is arranged in treating pond 11, aeration tube comprises first part, second section and the third part that corresponds respectively to anaerobic zone 171,172He aerobic zone, oxygen-starved area 173, every aeration tube at length direction, run through whole treating pond 11, thereby facilitate the replacing of aeration tube.Wherein, the density of the solarization air cap that the first part of aeration flexible pipe arranges is less than the density of the solarization air cap of second section setting, the density of the solarization air cap of the third part setting of aeration tube is greater than the density of the solarization air cap that the second section of aeration tube arranges, can make like this aeration rate of third part higher than the aeration rate of second section, the aeration rate of second section is greater than the aeration rate of first part, aeration zone 17 can be formed three child partitions (anaerobic zone 171,172He aerobic zone, oxygen-starved area 173) by configuration correspondingly.In a further example, the aperture of solarization air cap that the first part that also can make the aperture of solarization air cap of the second section setting of aerator be greater than aerator arranges,, the aperture of the solarization air cap of the third part setting of aeration tube is greater than the aperture of the solarization air cap that the second section of aeration tube arranges, makes the aeration rate of third part higher than the aeration rate of second section equally, the aeration rate of second section is greater than the aeration rate (first part does not arrange solarization air cap) of first part.The type of the corresponding child partition forming and corresponding DO concentration thereof as required, can correspondingly arrange the aperture of the second section of aeration tube and the solarization air cap of third part and/or density parameter etc.
In going back an embodiment, can aeration tube be only set at the bottom of the pond of aerobic zone 173 correspondences and carry out aeration, to maintain relatively high DO concentration, submersible agitator is set in anaerobic zone 171 and/or oxygen-starved area 172 and to realize, requires lower oxygen propagation function.
Above Fig. 1 and embodiment illustrated in fig. 2 in, the child partition of aeration zone 17 is anaerobic zone 171, the 172He aerobic zone, oxygen-starved area 173 that three relative water (flow) directions set gradually, but, it is not all restrictive that the row of child partition puts mode, quantity, array mode etc., it can be realized child partition is optionally set according to needing to combine bioprocess technology (determining according to pending sewage type) in aeration zone 17, but child partition must comprise at least two in anaerobic zone 171,172He aerobic zone, oxygen-starved area 173.For example, in Fig. 1 and 2 illustrated embodiment, the anaerobic zone 171 setting gradually, 172He aerobic zone, oxygen-starved area 173 can be used for having combined AAO(A and represent anaerobism or anoxic, and O represents aerobic) technique.
In another specific examples, the child partition of aeration zone 17 successively (according to water (flow) direction) can be oxygen-starved area and aerobic zone, therefore, can be used for having combined AO technique.
In going back a specific examples, the child partition of aeration zone 17 successively (according to water (flow) direction) can be anaerobic zone and aerobic zone.
In a specific examples again, the child partition of aeration zone 17 successively (according to water (flow) direction) can be anaerobic zone, oxygen-starved area, aerobic zone, oxygen-starved area, aerobic zone.
In another specific examples again, the child partition of aeration zone 17 successively (according to water (flow) direction) can be anaerobic zone, oxygen-starved area, aerobic zone.
Therefore, the sewage biological treatment system 10 of the embodiment of the present invention also has technique feature easy to adjust, and the applicable sewage type of processing is many.
Continue as shown in Figure 1, in aeration zone 17, based on Biological Contact Oxidation Process, to carry out after sewage disposal, sewage by further plug-flow to mud-water separation district 19(also referred to as settling region), in mud-water separation district 19, isolate clear water and make active sludge precipitation.
Figure 3 shows that the B-B cross section structure schematic diagram of the sewage biological treatment system that is depicted as Fig. 1 embodiment.Shown in Fig. 1 and Fig. 3, in this embodiment, put in mud-water separation district 19 sludge-water separating system, sludge-water separating system comprises the partition wall 191 and 192 of inclination, between partition wall 191 and 192, put a plurality of precipitation fillings 193, particularly, precipitation filling 193 is obliquely on the swash plate between stationary partition 191 and 192.From aeration zone, 17 mud mixtures that flow through slowly enter from the bottom of precipitation filling 193, because filler water flow inside is stable relatively gently, mud mixture can carry out separation on the surface of precipitation filling, active sludge is deposited in the surface of filler, and along with the mud of sedimentation increases, because gravity reason can landing goes out the sludge reflux passage of 19 bottoms, precipitation filling 195Zhi mud-water separation district, precipitating sludge at least can partly be back in inhalant region 13, precipitating sludge is mainly active sludge, its carrier as microbial bacteria backflows and can in upper once effluent cycle treating processes, again utilize to inhalant region 13.Meanwhile, the clear water after separation rises and the effluent trough by mud-water separation district 19 flows out.The sludge-water separating system of this embodiment can be realized the rapidly and efficiently clarification of mud mixture, and the region area occupied in mud-water separation district can reduce.
Figure 4 shows that the floor plan schematic diagram according to the sewage biological treatment system of further embodiment of this invention.The sewage biological treatment system 20 of this embodiment comprises that a treating pond 21(also can be called biochemical treatment tank equally), in treating pond 21, the sewage passing into (or pending sewage) carries out exporting clear water after purifying treatment in treating pond 21.Be similar to Bio-Dopp technique ground, treating pond 21 comprises that inhalant region 23, lifting zone 25, aeration zone 27(also can be called biochemical reaction zone) and mud-water separation district 29, inhalant region 23, lifting zone 25,27He mud-water separation district, aeration zone 29 are integrally arranged in this treating pond 21, are provided with biofilm packing (not shown in Fig. 3) in aeration zone 27.In this embodiment, aeration zone 37 comprises four child partitions, it is followed successively by oxygen-starved area 271, aerobic zone 272, oxygen-starved area 273, aerobic zone 274 according to water (flow) direction, thereby can combine and be different from AOAO technique embodiment illustrated in fig. 1 (A can represent anoxic or anaerobism, O represents aerobic), processed sewage (being generally mud mixture) flows into mud-water separation district 29, and to isolate clear water and active sludge, clear water is 19 outflows from mud-water separation district.
Than sewage biological treatment system embodiment illustrated in fig. 1 10, the Main Differences of sewage biological treatment system 20 is that aeration zone is divided into four child partitions, and there is slight change in inhalant region, lifting zone, aeration zone and mud-water separation district position, respective application is to embodiment illustrated in fig. 4 analogically for the specific configuration in the collocation method of child partition embodiment illustrated in fig. 1, inhalant region, lifting zone, aeration zone and mud-water separation district, and this is no longer going to repeat them.
Figure 5 shows that the principle of work schematic diagram of the sewage biological treatment system of Fig. 1 and Fig. 4 embodiment.As shown in Figure 5, first pending sewage is sent into the inhalant region of sewage biological treatment system, in inhalant region, pending sewage can mix with the precipitating sludge that mud-water separation district refluxes, certainly, in inhalant region, can also add other materials, for example, add the active sludge of process microorganism culturing and domestication etc.Further, in lifting zone, it carries out water distribution uniformity plug-flow to aeration zone by pending sewage.Further, in aeration zone, the sewage disposal that it combines bioprocess technology based on Biological Contact Oxidation Process (at least based on biological contact oxidation process).Further, in mud-water separation district, its mud mixture that aeration zone is flowed out carries out the separated of mud and clear water, thereby output obtains clear water, and precipitating sludge is back to inhalant region at least in part with recycling.Wherein, aerating system 175 on the one hand can be to the bottom input compressed-air of lifting zone, thereby realizes air-lift unit, is conducive to save the energy that sewage biological treatment system operation consumes; On the other hand, aerating system 175 can, to aeration controllably in the child partition of aeration zone, to transmit oxygen in sewage, be controlled the corresponding DO concentration of child partition.Above sewage treatment process can integrally complete in single treating pond (11 or 21 shown in dotted line frame), not only makes that whole sewage biological treatment system floor space is little, construction cost is low, and is very beneficial for reducing the power consumption of its normal operation.
During this is above described, use directional terminology (such as " on ", D score, " left side ", " right side " and " bottom " etc.) and the parts of the various embodiments of similar terms description represent the direction shown in accompanying drawing or the direction that can be understood by those skilled in the art.These directional terminology are used for relative description and clarification, rather than the orientation of any embodiment will be limited to concrete direction or orientation.
Above example has mainly illustrated sewage biological treatment system of the present invention.Although only some of them embodiments of the present invention are described, those of ordinary skills should understand, and the present invention can be within not departing from its purport and scope implements with many other forms.Therefore, the example of showing and embodiment are regarded as illustrative and not restrictive, and in the situation that not departing from spirit of the present invention as defined in appended each claim and scope, the present invention may be contained various modifications and replacement.
Claims (24)
1. a sewage biological treatment system, comprises treating pond and is integrally arranged on inhalant region, lifting zone, aeration zone and the mud-water separation district in described treating pond; It is characterized in that, described aeration zone is configured to comprise a plurality of child partitions, the mid-biofilm packing that is placed with of each child partition; Wherein, described a plurality of child partition is both or both the above arbitrary combination in anaerobic zone, oxygen-starved area and aerobic zone three.
2. sewage biological treatment system as claimed in claim 1, is characterized in that, between a plurality of child partitions in described aeration zone, by the first partition wall practical function, isolates.
3. sewage biological treatment system as claimed in claim 1 or 2, is characterized in that, by controlling the aeration efficiency of each child partition so that described aeration zone is configured to comprise a plurality of described child partitions.
4. sewage biological treatment system as claimed in claim 3, is characterized in that, in described anaerobic zone and/or described oxygen-starved area, submersible agitator is set, and aerator is set in described aerobic zone and carries out aeration.
5. sewage biological treatment system as claimed in claim 3, is characterized in that, in described anaerobic zone, oxygen-starved area and aerobic zone, corresponding being provided with can be distinguished independent the first aerating system, the second aerating system and the 3rd aerating system of controlling respectively; The aeration rate of controlling described the 3rd aerating system is greater than the aeration rate of described the second aerating system, and the aeration rate of controlling described the second aerating system is more than or equal to the aeration rate of the first aerating system.
6. sewage biological treatment system as claimed in claim 5, is characterized in that, the water (flow) direction that the aeration supervisor of the aeration tube of the aeration tube of the first aerating system, the second aerating system and the 3rd aerating system is all basically perpendicular in aeration zone is arranged.
7. the sewage biological treatment system as described in claim 5 or 6, is characterized in that, the aerator of the first aerating system, the second aerating system and the 3rd aerating system is perforated pipe, spiral aerator, middle micro-hole aerator or microporous hose.
8. sewage biological treatment system as claimed in claim 6, is characterized in that, the aperture of the solarization air cap of the aeration flexible pipe of described the 3rd aerating system is less than or equal to 5mm, and every meter of aeration flexible pipe is covered with at least 200 described solarization air caps.
9. sewage biological treatment system as claimed in claim 3, it is characterized in that, the water (flow) direction that the aeration branch pipe of described aeration zone is basically parallel in aeration zone is arranged in described treating pond, described aeration branch pipe comprises first part, second section and the third part that corresponds respectively to anaerobic zone, oxygen-starved area and aerobic zone, the aeration rate of described third part is higher than the aeration rate of described second section, and the aeration rate of described second section is greater than the aeration rate of described first part.
10. sewage biological treatment system as claimed in claim 9, it is characterized in that, density and/or the aperture of the solarization air cap that the density of the solarization air cap that the first part of described aeration branch pipe arranges and/or the second section that aperture is less than described aeration branch pipe arrange, density and/or the aperture of the solarization air cap that the second section that the density of the solarization air cap of the third part setting of described aeration branch pipe and/or aperture are greater than described aeration branch pipe arranges.
11. sewage biological treatment systems as claimed in claim 10, is characterized in that, the aperture of the solarization air cap of this aeration flexible pipe is less than or equal to 5mm; In the third part of described aeration tube, every meter of aerating pore flexible pipe is covered with at least 200 described solarization air caps.
12. sewage biological treatment systems as claimed in claim 1 or 2, is characterized in that, described biofilm packing is denitrogenation filler.
13. sewage biological treatment systems as claimed in claim 1 or 2, is characterized in that, described denitrogenation filler snakelike arranging in described child partition arranges.
14. sewage biological treatment systems as claimed in claim 1 or 2, is characterized in that, the spacing between described denitrogenation filler is 80mm to 250mm.
15. sewage biological treatment systems as claimed in claim 1 or 2, is characterized in that, the dissolved oxygen concentration of described anaerobic zone is 0-0.2mg/L, and the dissolved oxygen concentration of described oxygen-starved area is 0-0.5mg/L, and the dissolved oxygen concentration of described aerobic zone is 0.3-8.0mg/L.
16. sewage biological treatment systems as claimed in claim 1 or 2, is characterized in that, the activated sludge concentration being fixed on described biofilm packing in described aeration zone is 5g/L to 40g/L.
17. sewage biological treatment systems as claimed in claim 16, is characterized in that, the activated sludge concentration being suspended in sewage in described aeration zone is 2g/L-5g/L.
18. sewage biological treatment systems as claimed in claim 1 or 2, it is characterized in that, in described lifting zone, be provided with air plug-flow system, described air plug-flow system passes into air so that the liquid level of described lifting zone promotes by the aerating system to described sewage biological treatment system.
19. sewage biological treatment systems as claimed in claim 18, is characterized in that, between described aeration zone and described lifting zone, the second partition wall are set, and the height of described the second partition wall is lower than the height of the liquid level being raised of described lifting zone.
20. sewage biological treatment systems as claimed in claim 16, is characterized in that, the difference of altitude of the height of the liquid level being raised and the height of described the second partition wall of described lifting zone is set, to control plug-flow to the flow stream velocity of described aeration zone.
21. sewage biological treatment systems as claimed in claim 2, is characterized in that, described in each, in the first partition wall, are provided with flow passage.
22. sewage biological treatment systems as claimed in claim 1 or 2, it is characterized in that, described mud-water separation is provided with sludge-water separating system in district, and described sludge-water separating system comprises two the 3rd partition walls of inclination, between two the 3rd partition walls, puts a plurality of precipitation fillings.
23. sewage biological treatment systems as claimed in claim 1 or 2, it is characterized in that, described a plurality of child partition is followed successively by anaerobic zone, oxygen-starved area and aerobic zone according to water (flow) direction, or be anaerobic zone and aerobic zone, or be oxygen-starved area and aerobic zone, or be anaerobic zone, oxygen-starved area, aerobic zone, oxygen-starved area and aerobic zone, or be oxygen-starved area, aerobic zone, oxygen-starved area and aerobic zone.
24. sewage biological treatment systems as claimed in claim 1 or 2, is characterized in that, the handled sewage of described sewage biological treatment system is: the chemical oxygen demand (COD) of sewage is more than or equal to 6000 mg/L, and the ammonia nitrogen concentration of sewage is more than or equal to 200mg/L.
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| CN106915865A (en) * | 2015-12-26 | 2017-07-04 | 江苏博凯环境科技有限公司 | The denitrogenation ABP techniques and equipment of a kind of high concentration total nitrogen waste water |
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| CN114230087A (en) * | 2021-10-29 | 2022-03-25 | 广东益康生环保科技有限公司 | Multistage AO wastewater treatment integrated equipment and denitrification method thereof |
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Denomination of invention: Wastewater biological treatment system based on biological contact oxidation process Effective date of registration: 20221214 Granted publication date: 20160720 Pledgee: Jiangsu Yixing Rural Commercial Bank Co.,Ltd. Heqiao Sub branch Pledgor: RUISHENG ENVIRONMENT CO.,LTD. Registration number: Y2022980027634 |
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