CN104045154B - Sewage biological treatment system based on Biological Contact Oxidation Process - Google Patents
Sewage biological treatment system based on Biological Contact Oxidation Process Download PDFInfo
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
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Abstract
The present invention provides a kind of sewage biological treatment system based on Biological Contact Oxidation Process, belongs to technical field of biological sewage treatment.This sewage biological treatment system includes processing pond and being integrally arranged on the inhalant region in described process pond, lifting zone, aeration zone and mud-water separation district；Described aeration zone is configured to include multiple child partition, and each child partition is mid-is placed with biofilm packing；Wherein, the plurality of child partition is both or both any combination above in anaerobic zone, anoxic zone and aerobic zone three.This sewage biological treatment system denitrification effect is good, sewage treating efficiency is high, sludgd deposition is few and applied widely, and the advantage that can have biological multiplication process concurrently.
Description
Technical field
Technical field of biological sewage treatment of the present invention, relate to inhalant region, lifting zone, aeration zone and the mud-water separation district integrally sewage biological treatment system in processing pond, particularly relate to aeration zone and be divided into multiple child partition 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 resource is more aobvious important in the development of society, and people also increasingly pay attention to water technology.Wherein, dirty water living creature processing technique receives significant attention and obtains development.
In dirty water living creature processing technique, a kind of typical method is activated sludge process, the method is based on the biological flocculation and precipitation of activated sludge, absorption and Oxidation, to decompose in removal sewage (or being called waste water) organic pollution etc., then making mud be separated from water, activated sludge can recycling.In activated sludge process, wherein important technological parameter is dissolved oxygen (DO, the DissolvedOxygen) concentration in water and activated sludge concentration.For ensureing DO concentration, generally in the sewage biological treatment system adopting activated sludge process, it is equipped with corresponding aerating system, to transmit oxygen in pending sewage.
Currently, biological multiplication (Bio-Dopp) technique is the advanced sewage disposal technology in activated sludge process, it comes from Germany, sewage biological treatment system employing based on biological multiplication process processes pond, inhalant region, lifting zone, aeration zone and mud-water separation district are arranged in this process pond, it is achieved integral structure.Therefore, the floor space based on this sewage biological treatment system is little, and greatly reduces pipeline investment, and construction cost is low.And, aeration zone based on the sewage biological treatment system of biological multiplication process adopts LDO (such as 0.3-0.5mg/L) and high activity sludge concentration (such as 5-8g/L), to guarantee the denitrogenation processing realizing synchronous nitration and denitrification, reach good denitrogenation and phosphor-removing effect, reduce sludge output, keep continuing efficient and stable water treatment efficiency.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 that aeration efficiency is high, and require DO even concentration in aeration zone；Contradiction is easily produced between LDO aeration and high activity sludge concentration.Such as, for meeting LDO, it is low that aeration produces power, and the activated sludge of high-load is susceptible to sludge settling, reduce thus being easily caused sludge concentration, affect treatment effect, and settled sludge also can affect the work (such as causing that aeration tube blocks) of the aeration tube bottom aeration zone；If increasing aeration rate, it is easily caused again nitric efficiency not high.Therefore, based on biological multiplication process sewage biological treatment system in a particular application, the realization of its engineering effort is highly dependent on the advanced aeration process of aeration zone, especially the aeration tube technology of arrangement bottom aeration zone, and denitrification effect is limited.For ammonia nitrogen in high density (NH3-N) sewage (such as Urethane Elastic Fibre Producing Waste Water, leather-making waste water etc.) process, or during the fore-end sewage ammonia nitrogen comparision contents height of aeration zone, 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 being highly dependent on the advanced aeration process of aeration zone so that the DO even concentration of aeration zone and be stably maintained at reduced levels, such as, aeration tube uses the aeration flexible pipe of thickness only 0.3-0.7mm, solarization air cap size controls at about 1mm, every meter of aeration tube is covered with at least 2000 solarization air caps, a plurality of aeration tube 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 have been called disclosed in the patent of " a kind of aerator " such a aeration process.But, engineering practice reflects, this aerating system (especially aeration tube) costly.
In view of this, it is necessary to propose a kind of novel sewage biological treatment system.
Summary of the invention
An object of the present invention is in that, at least improves the sewage water denitrification effect of sewage biological treatment system.
A further object of the present invention is in that, reduces the sewage biological treatment system dependence to advanced Air Exposure technology, reduces the cost of sewage biological treatment system further.
For realizing object above or other purposes, the present invention provides a kind of sewage biological treatment system, and it includes processing pond and being integrally arranged on the inhalant region in described process pond, lifting zone, aeration zone and mud-water separation district；Described aeration zone is configured to include multiple child partition, and each child partition is mid-is placed with biofilm packing；Wherein, the plurality of child partition is both or both any combination above in anaerobic zone, anoxic zone and aerobic zone three.
According to the sewage biological treatment system of one embodiment of the invention, wherein, function isolation can be realized by the first partition wall between the multiple child partitions in described aeration zone.
In the sewage biological treatment system of described embodiment before, each described first partition wall is provided with fluid course.
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 include multiple described child partition.
In the sewage biological treatment system of described any embodiment before, selectively, described anaerobic zone and/or submersible agitator is set in described anoxic zone, described aerobic zone arranges aerator and carries out aeration.
In the sewage biological treatment system of described any embodiment before, selectively, described anaerobic zone, anoxic zone and aerobic zone are correspondingly arranged on the first aerating system, the second aerating system and the 3rd aerating system respectively that can independently control；Control the aeration rate aeration rate more than described second aerating system of described 3rd aerating system, and control the aeration rate aeration rate more than or equal to the first aerating system of described second aerating system.
Further, the aeration tube of the first aerating system, the aeration tube of the second aerating system and the aeration supervisor of the 3rd aerating system are all basically perpendicular to the water (flow) direction in aeration zone and arrange.
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 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 any embodiment before, selectively, the aeration branch pipe of described aeration zone is basically parallel to the water (flow) direction in aeration zone and arranges in described process pond, described aeration branch pipe includes corresponding respectively to the Part I of anaerobic zone, anoxic zone and aerobic zone, Part II and Part III, the aeration rate of described Part III is higher than the aeration rate of described Part II, and the aeration rate of described Part II is more than the aeration rate of described Part I.
Further, the density of the solarization air cap that the solarization air cap quantity that the Part I of described aeration flexible pipe is arranged is arranged less than the Part II of described aeration flexible pipe and/or aperture, the density of the solarization air cap that the density of the solarization air cap that the Part III of described aeration flexible pipe is arranged and/or aperture are arranged more than the Part II of described aeration flexible pipe and/or aperture.
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 Part III 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 any embodiment before, it is preferable that described biofilm packing is denitrogenation filler.
Preferably, described denitrogenation filler is arranged to snakelike arrangement in described child partition.
Preferably, the spacing between described denitrogenation filler is 80mm to 250mm.
In the sewage biological treatment system of described any embodiment before, the dissolved oxygen concentration of described anaerobic zone is 0 0.2mg/L, and the dissolved oxygen concentration of described anoxic zone 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 any 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 any embodiment before, preferably, being provided with air plug-flow system in described lifting zone, described air plug-flow system passes into air by the aerating system of described sewage biological treatment system so that the liquid level of described lifting zone promotes.
Further, arranging the second partition wall between described aeration zone and described lifting zone, the height of described second partition wall is lower than the height of the elevated liquid level of described lifting zone.
Further, the height of the elevated liquid level of described lifting zone and the difference in height of the height of described second partition wall are set, to control the plug-flow flow stream velocity to described aeration zone.
In the sewage biological treatment system of described any embodiment before, it is preferable that be provided with sludge-water separating system in described mud-water separation district, described sludge-water separating system includes two the 3rd partition walls tilted, and puts multiple precipitation filling between two the 3rd partition walls.
In the sewage biological treatment system of described any embodiment before, alternatively, the plurality of child partition is followed successively by anaerobic zone, anoxic zone and aerobic zone according to water (flow) direction, or it is anaerobic zone and aerobic zone, or it is anoxic zone and aerobic zone, or it is anaerobic zone, anoxic zone, aerobic zone, anoxic zone and aerobic zone, or is anoxic zone, aerobic zone, anoxic zone and aerobic zone.
In the sewage biological treatment system of described any embodiment before, it is preferable that the sewage handled by described sewage biological treatment system is: the COD of sewage is more than or equal to 6000mg/L, and the ammonia nitrogen concentration of sewage is more than or equal to 200mg/L.
The solution have the advantages that, by aeration zone being divided multiple child partition and putting biofilm packing child partition is mid-, can effectively solve in Bio-Dopp technique the contradictory problems in denitrification effect between low DO concentration and high sludge concentration, on the one hand, it is suitable for carrying out the denitrogenation processing of synchronous nitration and denitrification (including omnidistance synchronous nitration and denitrification), is greatly improved denitrogenation processing effect；On the other hand, biofilm packing can cause that effective active sludge concentration is greatly improved, and the activated sludge concentration of suspension can effectively reduce, it is possible to avoiding sludgd deposition and greatly reduce sludge volume, system operation maintenance is easier to；Another further aspect, it is possible to the Organic substance in sewage is carried out efficient oxidation process；Yet still another aspect, denitrification effect is not primarily dependent on the aeration tube performance of aerating system, it is possible to be substantially reduced the aeration tube cost of aerating system, thus reducing the construction cost of sewage biological treatment system；Still further aspect, each child partition is easily combined according to pending sewage situation, thus combining various bioprocess technology, accessible sewage is many and effective.Further, this sewage biological treatment system has the advantage that floor space is little, pipe-line construction cost is low, operation expense is low of Bio-Dopp technique concurrently.
Accompanying drawing explanation
From described further below in conjunction with accompanying drawing, it will making the above and other purpose of the present invention and advantage be more fully apparent from, wherein, same or analogous key element is adopted and is indicated by the same numeral.
Fig. 1 is the horizontal layout schematic diagram of the sewage biological treatment system according to one embodiment of the invention.
Fig. 2 is the Section A-A structural representation of the sewage biological treatment system of Fig. 1 embodiment.
Fig. 3 is the section B-B structural representation of the sewage biological treatment system of Fig. 1 embodiment.
Fig. 4 is the horizontal layout schematic diagram of the sewage biological treatment system according to further embodiment of this invention.
Fig. 5 is the operation principle schematic diagram of the sewage biological treatment system of Fig. 1 and Fig. 4 embodiment.
Detailed description of the invention
Be described below be the present invention multiple possible embodiment in some, it is desirable to provide the basic understanding to the present invention, it is no intended to confirm the crucial of the present invention or conclusive key element or limit scope of the claimed.Easy to understand, according to technical scheme, under the connotation not changing the present invention, one of ordinary skill in the art can propose other implementations that can mutually replace.Therefore, detailed description below and accompanying drawing are only the exemplary illustrations to technical scheme, and are not to be construed as the whole of the present invention or are considered as defining or limiting technical solution of the present invention.
In as explained below, clear and simple and clear for what describe, all parts shown in figure are not described.The disclosure being fully able to realization of the present invention is provided for those of ordinary skill in the art shown in the drawings of multiple parts.To those skilled in the art, permitted multipart operation to be all familiar with and obvious.
Fig. 1 show the horizontal layout schematic diagram of the sewage biological treatment system according to one embodiment of the invention.The sewage biological treatment system 10 of this embodiment includes a process pond 11(can also be called biochemical treatment tank), in processing pond 11, the sewage (or pending sewage) passed into exports clear water after carrying out purified treatment in processing pond 11.It is similar to Bio-Dopp technique ground, process that pond 11 includes inhalant region 13, lifting zone 15, aeration zone 17(can also be called biochemical reaction zone) and mud-water separation district 19, inhalant region 13, lifting zone 15, aeration zone 17 and mud-water separation district 19 are integrally arranged in this process 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 includes three child partitions, i.e. anoxic zone 171, anaerobic zone 172 and aerobic zone 173, each child partition can complete a kind of biological treatment (will describe behind) accordingly, processed sewage (being generally mud mixture) flows into mud-water separation district 19, to isolate clear water and activated sludge, clear water flows out from mud-water separation district 19.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 processing pond 11 can be, but not limited to as rectangle, it is possible to arranges its shape, area etc. according to concrete situation (such as, the land used restriction of sewage biological treatment system)；Process pond 11 can molding manufacture in advance, it is also possible to formed with reinforced concrete material in situ construction；Keep apart to form inhalant region 13 as shown in Figure 1 with can passing through wall part in processing pond 11, lifting zone 15, the functional areas such as aeration zone 17 and mud-water separation district 19, certainly, according to Sewage Biological Treatment principle (as shown in Figure 3) inhalant region 13, lifting zone 15, corresponding water stream channel can be provided with between aeration zone 17 and mud-water separation district 19, pending sewage can flow through inhalant region 13 successively, lifting zone 15, aeration zone 17 and mud-water separation district 19, but inhalant region 13, lifting zone 15, aeration zone 17 and mud-water separation district 19 particular location in processing pond 11 is arranged neither restrictive (such as the sewage biological treatment system 20 of another embodiment as shown in Figure 4).
Fig. 2 show the Section A-A structural representation of the sewage biological treatment system of Fig. 1 embodiment.In conjunction with shown in Fig. 1 and Fig. 2, specifically, sewage enters in inhalant region 13 by intake chamber (not shown), inhalant region 13 is provided with the sludge reflux passage (not shown) connected 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 activated sludge, its as the carrier of microbial bacteria backflow to inhalant region 13 can in upper once effluent cycle processing procedure again with.It is to be appreciated that sewage is before entering inhalant region 13, it is possible to carry out other water treatment procedures of pretreatment；The kind of sewage is not restrictive, for instance, it is possible to for sanitary sewage, it is also possible to for ammonia nitrogen in high density (NH3-N) Urethane Elastic Fibre Producing Waste Water, leather-making waste water etc..
Being isolated by partition wall 135 between inhalant region 13 and lifting zone 15, the bottom of partition wall 135 is provided with intake tunnel, sewage can pass through intake tunnel and flow into lifting zone 15 smoothly.Lifting zone 15 is mainly used in pending sewage carrying out water distribution uniformity plug-flow to aeration zone 17.In this embodiment, lifting zone 15 mainly utilizes gas lift principle that water inlet is promoted, specifically, the bottom of lifting zone 15 is provided with air plug-flow system 151, air plug-flow system 151 can pass through aerating system 175(as shown in Figure 2) pass into compression air, thus emerging, a large amount of bubbles make the sewage of lifting zone 15 form mixing wastewater with air, and the volume of the sewage of lifting zone 15 increases the height causing its liquid level 159 higher than partition wall 157, also above 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 used for isolating lifting zone 15 and functional areas, 17 two, aeration zone, and the area of space between partition wall 157 and partition wall 135 is defined as lifting zone 15, and bubble and sewage that air plug-flow system 151 is emerged 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, realizes plug-flow with so can utilizing liquid level difference water conservancy.In this embodiment, the liquid level that air plug-flow system 151 can control between liquid level 159 and liquid level 179 is poor, for instance, regulate air capacity and air inflow velocity, therefore, air plug-flow system 151 can also control the plug-flow flow stream velocity to aeration zone 17.
Aeration zone 17 is provided with in biofilm packing 178(Fig. 1 not shown), and, aeration zone 17 is divided into multiple child partition, in this embodiment, child partition respectively anaerobic zone 171, anoxic zone 172 and aerobic zone 173, each child partition is provided with biofilm packing 178 in (anaerobic zone 171, anoxic zone 172 or aerobic zone 173).In one example, function isolation is realized by partition wall between child partition, for instance, partition wall 1712 is set between anaerobic zone 171 and anoxic zone 172, partition wall 1723 is set between anoxic zone 172 and aerobic zone 173.It will be appreciated that, partition wall 1712, partition wall 1723 can't stop current to flow according to direction as depicted, it mainly makes the DO concentration between child partition to be generally distinguished, such as, partition wall 1712, partition wall 1723 height can lower than the height of the liquid level 179 of aeration zone 17, partition wall 1712, partition wall 1723 can also arrange fluid course, when even at the height of partition wall 1712, partition wall 1723 equal to or higher than the height of liquid level 179, it is possible to adopt stripping regime to promote current by direction as depicted flowing between each subregion.
In a further example, partition wall (such as partition wall 1712 and 1723) can be not provided with between anaerobic zone 171, anoxic zone 172 and aerobic zone 173 distinguish, it is generally distinguished mainly by DO concentration difference, in this case, it will be appreciated that,, can there is less transition region in boundary not strict between each child partition, the DO concentration of transition region is between the DO concentration of two adjacent child partitions between child partition；The division between child partition in aeration zone can be passed through entity apparatus (such as divider wall) and realize, it is also possible to realize (such as based on the main body difference of DO concentration) by blurring division.
In this example, aeration zone 17 also includes aerating system 175, and air plug-flow system 151 not only can be blown by aerating system 175, and air can be made to emerge in the aeration tube of aerating system 175 little bubble, to transmit oxygen in the sewage to aeration zone 17.Aerating system 175 is divided into multiple part that can independently control according to child partition correspondence, such as, aerating system 175 includes the first aerating system 175A, the second aerating system 175B and the three aerating system 175C, first aerating system 175A includes the aeration tube 176A being correspondingly arranged at the bottom of anaerobic zone 171, the aeration tube 176B, the 3rd aerating system 175C that second aerating system 175B includes being correspondingly arranged at the bottom of anoxic zone 172 includes the aeration tube 176C being correspondingly arranged at the bottom of aerobic zone 173.Aeration tube 176A, 176B and 176C upwards aeration to transmit oxygen in aeration zone, by controlling the first aerating system 175A, the second aerating system 175B and the three aerating system 175C respectively, the aeration rate (aeration rate of aeration tube 176C is more than the aeration rate aeration rate more than aeration tube 176A of the aeration rate of aeration tube 176B, aeration tube 176B) of regulable control aeration tube 176A, 176B and 176C can be distinguished so that the DO concentration difference alienation in aeration zone 17 district and be configured to anaerobic zone 171, anoxic zone 172 and aerobic zone 173；In this embodiment, the dissolved oxygen concentration of anaerobic zone 171 is 0 0.2mg/L, and the dissolved oxygen concentration of anoxic zone 172 is 0 0.5mg/L, and the dissolved oxygen concentration of aerobic zone 173 is 0.3 8.0mg/L.When normal operation, the aeration rate of aeration tube 176A can be zero.
nullBiofilm packing 178 in each subregion of aeration zone 17 can as microorganism carrier，Biofilm packing 178 can be formed the activated sludge of the suspension partly fixing biomembrane to be formed thereon，Thus fixing sludge concentration is more than the sludge concentration suspended，Bio-Dopp technique compared to prior art，On the one hand，Activated sludge concentration is greatly improved，Such as，It is fixed on the activated sludge concentration on biofilm packing 178 can reach to obtain after 5g/L-40g/L(is processed by Equivalent Calculation)，It is suspended in the activated sludge concentration in sewage and can reach 2g/L-5g/L(such as，3g/L-4g/L)，So by the pollutant that can more effectively remove in sewage (such as，DO concentration in anaerobic zone and anoxic zone is little，Its total nitrogen removal effect can be greatly improved)；On the other hand, the sludgd deposition also avoided, sludge volume can also greatly reduce, and sludgd deposition is little to the influence on system operation of sewage biological treatment system 10, it is easier to safeguards.nullEspecially prominent is，After aeration zone 17 is divided into multiple child partition，Each child partition can control differently configured DO concentration，Completely without in the Bio-Dopp technique of such as prior art, DO even concentration is controlled in a certain low strength range to complete nitration denitrification reaction，Multiple child partitions flexible combination can carry out multiple bioprocess technology，Such as，In anaerobic zone 171 and anoxic zone 172，Its DO concentration is relatively low，And biofilm packing 178 causes that activated sludge concentration is significantly high，It is very suitable for carrying out the denitrogenation processing of synchronous nitration and denitrification (including omnidistance synchronous nitration and denitrification)，Anaerobic zone 171 and anoxic zone 172 can complete denitrogenation processing preferably，In aerobic zone 173，Its DO concentration is high，And it is significantly high that biofilm packing 178 also leads to activated sludge concentration，Organic oxidation processes in sewage is effective；Therefore the problem that low DO concentration and the caused denitrification effect of high activity sludge concentration condition in the Bio-Dopp technique of prior art are limited is solved well.
In this embodiment, sewage biological treatment system 10 can process such as COD(ChemicalOxygenDemand, COD completely) 6000 or more than 6000mg/L, ammonia nitrogen (NH3-N) concentration processes at the ammonia nitrogen waste water of 200mg/L or more than 200mg/L, for instance, garbage leaching liquid, leather-making waste water, Urethane Elastic Fibre Producing Waste Water etc..And the sewage biological treatment system based on Bio-Dopp technique that this is prior art can not be accomplished completely.
It is further understood that, it is set in aeration zone 17 after multiple child partition juxtaposition puts biofilm packing 178, if need not in big aeration zone 17(Bio-Dopp technique aeration zone area very big) in efficiently, aeration is to maintain the uniformity of DO concentration equably, and then decrease the dependence of the aeration tube technology to aerating system, such as, in this embodiment, aeration tube 176A, 176B and/or 176C can select perforated pipe, and (material selects optional PVC, carbon steel, fiberglass, UPVC, ABS etc.), spiral aerator, the simple aeration devices such as middle micro-hole aerator or microporous hose, the thickness of the aerator (such as aeration flexible pipe) of the 3rd aerating system is not restrictive；As such, it is possible to be substantially reduced the cost of aeration tube, even if when when increasing biofilm packing 178, partition wall 1712 and 1723, it is also possible to reduce the construction cost of sewage biological treatment system 10.
Certainly, when construction cost is less demanding but requirement reduces aeration energy consumption and improves DO even concentration, can also select application Chinese Patent Application No. is the aerator that CN200820108555.8, name are called " a kind of aerator ", the particularly aeration tube 176C of aerobic zone 173 correspondence, it is possible to select to apply such aerator.Patent CN200820108555.8 can comprise and this in entirety by reference.
It will be appreciated that, after each child partition of aeration zone 17 inserts biofilm packing 178, although considerably increased the concentration of activated sludge by the biomembrane being fixed on filler, in the sewage of each child partition, there is the activated sludge being suspended in sewage more or less；Therefore, the activated sludge suspended on the one hand can carry out sewage disposal based on the activated sludge process of traditional definition, but prior one side is, the biofilm packing 178 inserted causes that being based primarily upon biological contact oxidation process in aeration zone 17 carries out sewage disposal.
In a preferred embodiment, biofilm packing 178 can be chosen as denitrogenation filler, as such, it is possible to utilize the efficient denitrification effect of denitrogenation filler, improves the denitrification effect of aeration zone 17 further.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 filler disclosed in " a kind of reinforcement type filler " patent, can also apply Chinese Patent Application No. is CN201010576259.2, name is called filler disclosed in " a kind of spiral filler " patent, can also apply Chinese Patent Application No. is CN201010576284.0, name is called filler disclosed in " a kind of compact support type packing " patent, can also apply Chinese Patent Application No. is CN201010576283.6, name is called filler disclosed in " a kind of dendritic filler " patent.
Denitrogenation filler can be, but not limited to arrange with snakelike arrangement 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, in Fig. 1 and embodiment illustrated in fig. 2, aerating system is divided into three parts, first aerating system 175A, the second aerating system 175B and the three aerating system 175C, aeration zone 17 configuration is divided into anaerobic zone 171, anoxic zone 172 and aerobic zone 173 by the aeration rate independently controlling them；The aeration tube 176A of the first aerating system 175A, the second aerating system 175B the aeration tube 176C of aeration tube 176B and the three aerating system 175C be all substantially perpendicular to the water (flow) direction (in aeration zone direction shown in arrow) of aeration zone 17 and arrange abreast, the aeration tube of appropriate section so easily individually controls aeration rate, and convenient configuration forms child partition.In another embodiment, in its aerating system, the water (flow) direction that can also be basically parallel to by the aeration tube of aeration zone in aeration zone is arranged in processing pond 11, aeration tube includes corresponding respectively to anaerobic zone 171, anoxic zone 172 and the Part I of aerobic zone 173, Part II and Part III, every aeration tube longitudinally run through whole process pond 11, thus facilitating the replacing of aeration tube.Wherein, the density of the solarization air cap that the density of the solarization air cap that the Part I of aeration flexible pipe is arranged is arranged less than Part II, the density of the solarization air cap that the density of the solarization air cap that the Part III of aeration tube is arranged is arranged more than the Part II of aeration tube, so can make the aeration rate of Part III higher than the aeration rate of Part II, Part II aeration rate more than the aeration rate of Part I, aeration zone 17 can be configured accordingly three child partitions (anaerobic zone 171, anoxic zone 172 and aerobic zone 173) of formation.In a further example, the aperture of solarization air cap that the aperture of the solarization air cap that the Part II of aerator arranges arranges can also be made more than the Part I of aerator, the aperture of solarization air cap that the aperture of solarization air cap that the Part III of aeration tube is arranged is arranged more than the Part II of aeration tube, make equally the aeration rate of Part III be higher than the aeration rate of Part II, Part II aeration rate more than the aeration rate (Part I is not provided with solarization air cap) of Part I.The type of the child partition being correspondingly formed as required and corresponding DO concentration thereof, it is possible to aperture and/or the density parameter etc. of the Part II of aeration tube and the solarization air cap of Part III are correspondingly set.
In a further embodiment, it is possible to only carry out aeration arranging aeration tube at the bottom of the pond of aerobic zone 173 correspondence, to maintain of a relatively high DO concentration, anaerobic zone 171 and/or anoxic zone 172 arrange submersible agitator to realize requiring relatively low oxygen transmission function.
In figure 1 above and embodiment illustrated in fig. 2, the child partition of aeration zone 17 is anaerobic zone 171, anoxic zone 172 and the aerobic zone 173 that three relative water (flow) directions set gradually, but, the be set with mode of child partition, quantity, compound mode etc. are not all restrictive, it can according to needing combination bioprocess technology (determining according to pending sewage type) to realize optionally arranging child partition in aeration zone 17, but, child partition must include at least two in anaerobic zone 171, anoxic zone 172 and aerobic zone 173.Such as, in Fig. 1 and 2 illustrated embodiment, anaerobic zone 171, anoxic zone 172 and the aerobic zone 173 set gradually can be used to combination and complete AAO(A and represent anaerobism or anoxia, and O represents aerobic) technique.
In another instantiation, the child partition of aeration zone 17 can be anoxic zone and aerobic zone (according to water (flow) direction) successively, therefore, it can for having combined AO technique.
In an also instantiation, the child partition of aeration zone 17 can be anaerobic zone and aerobic zone successively (according to water (flow) direction).
In another instantiation, the child partition of aeration zone 17 can be anaerobic zone, anoxic zone, aerobic zone, anoxic zone, aerobic zone successively (according to water (flow) direction).
In another instantiation again, the child partition of aeration zone 17 can be anaerobic zone, anoxic zone, aerobic zone successively (according to water (flow) direction).
Therefore, the sewage biological treatment system 10 of the embodiment of the present invention also has the convenient feature of technique adjustment, is suitable for the sewage type processed many.
Continue as it is shown in figure 1, after aeration zone 17 carries out sewage disposal based on Biological Contact Oxidation Process, sewage by further plug-flow to mud-water separation district 19(also referred to as settling zone), in mud-water separation district 19, isolate clear water and make activated sludge precipitate.
Fig. 3 show the section B-B structural representation of the sewage biological treatment system of Fig. 1 embodiment.In conjunction with shown in Fig. 1 and Fig. 3, in this embodiment, mud-water separation district 19 puts sludge-water separating system, sludge-water separating system includes the partition wall 191 and 192 tilted, multiple precipitation filling 193 is put between partition wall 191 and 192, specifically, precipitation filling 193 can obliquely on swash plate between stationary partition 191 and 192.The mud mixture flow through from aeration zone 17 slowly enters from the bottom of precipitation filling 193, owing to filler water flow inside is stable relatively gently, mud mixture can be easily separated on the surface of precipitation filling, activated sludge is deposited in the surface of filler, and along with the mud of sedimentation increases, owing to gravity landing can go out the sludge reflux passage bottom precipitation filling 195 to mud-water separation district 19, precipitating sludge at least can partly be back in inhalant region 13, precipitating sludge is mainly activated sludge, its as the carrier of microbial bacteria backflow to inhalant region 13 can in upper once effluent cycle processing procedure again with.Meanwhile, the clear water after separation rises and passes through the effluent trough outflow in mud-water separation district 19.The sludge-water separating system of this embodiment can realize the rapidly and efficiently clarification of mud mixture, and, the region area occupied in mud-water separation district can reduce.
Fig. 4 show the horizontal layout schematic diagram of the sewage biological treatment system according to further embodiment of this invention.The sewage biological treatment system 20 of this embodiment includes a process pond 21(equally can also be called biochemical treatment tank), in processing pond 21, the sewage (or pending sewage) passed into exports clear water after carrying out purified treatment in processing pond 21.It is similar to Bio-Dopp technique ground, process that pond 21 includes inhalant region 23, lifting zone 25, aeration zone 27(can also be called biochemical reaction zone) and mud-water separation district 29, inhalant region 23, lifting zone 25, aeration zone 27 and mud-water separation district 29 are integrally arranged in this process pond 21, are provided with biofilm packing (not shown in Fig. 3) in aeration zone 27.In this embodiment, aeration zone 37 includes four child partitions, it is followed successively by anoxic zone 271, aerobic zone 272, anoxic zone 273, aerobic zone 274 according to water (flow) direction, such that it is able to combined the AOAO technique that is different from embodiment illustrated in fig. 1, (A can represent anoxia or anaerobism, O represents aerobic), processed sewage (being generally mud mixture) flows into mud-water separation district 29, and to isolate clear water and activated sludge, clear water flows out from mud-water separation district 19.
Sewage biological treatment system 10 compared to embodiment illustrated in fig. 1, the Main Differences of sewage biological treatment system 20 is in that aeration zone is divided into four child partitions, and inhalant region, lifting zone, aeration zone and mud-water separation district position there occurs slight change, the concrete configuration in the collocation method of the child partition of embodiment illustrated in fig. 1, inhalant region, lifting zone, aeration zone and mud-water separation district can respective application be to embodiment illustrated in fig. 4 analogically, and this is no longer going to repeat them.
Fig. 5 show the operation principle 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, at inhalant region, pending sewage can mix with the precipitating sludge of mud-water separation district backflow, certainly, other materials can also be added at inhalant region, for instance, add the activated sludge etc. through microorganism culturing and domestication.Further, in lifting zone, pending sewage is carried out water distribution uniformity plug-flow to aeration zone by it.Further, in aeration zone, it is combined the sewage disposal of bioprocess technology based on Biological Contact Oxidation Process (at least based on biological contact oxidation process).Further, in mud-water separation district, the mud mixture that aeration zone is flowed out is carried out the separation of mud and clear water by it, thus output obtains clear water, and precipitating sludge is back to inhalant region at least in part with recycling.Wherein, aerating system 175 1 aspect can input compression air to the bottom of lifting zone, promotes thus realizing air, is conducive to saving sewage biological treatment system and runs the energy consumed；On the other hand, aerating system 175 can in the child partition of aeration zone controllably aeration, to transmit oxygen in sewage, control the corresponding DO concentration of child partition.Above sewage disposal process integrally can complete in single process pond (11 shown in broken box or 21), not only makes that whole sewage biological treatment system floor space is little, construction cost is low, and is very beneficial for reducing its properly functioning power consumption.
During this is described above, use directional terminology (such as " on ", D score, "left", "right" and " bottom " etc.) and the parts of various embodiments that describe of similar terms represent the direction shown in accompanying drawing or the direction that can be readily appreciated by one skilled in the art.These directional terminology are used for relative description and clarification, rather than the orientation of any embodiment to be limited to concrete direction or orientation.
Example above primarily illustrates the sewage biological treatment system of the present invention.Although only some of them embodiments of the present invention being described, but those of ordinary skill in the art it is to be appreciated that the present invention can without departing from its spirit with scope in many other form implement.Therefore, the example shown and embodiment are considered illustrative and not restrictive, and when the of the present invention spirit and scope defined without departing from such as appended claims, the present invention is likely to contain various amendments and replacement.
Claims (24)
1. based on a sewage biological treatment system for biological multiplication process, including processing pond and being integrally arranged in described process pond the inhalant region, lifting zone, aeration zone and the mud-water separation district that are sequentially connected with；It is characterized in that, described aeration zone is configured to include the child partition that multiple dissolved oxygen concentration differs, and each child partition is mid-is placed with biofilm packing；Wherein, the plurality of child partition is both or both any combination above in anaerobic zone, anoxic zone and aerobic zone three.
2. sewage biological treatment system as claimed in claim 1, it is characterised in that realize function isolation by the first partition wall between the multiple child partitions in described aeration zone.
3. sewage biological treatment system as claimed in claim 1 or 2, it is characterised in that by controlling the aeration efficiency of each child partition so that described aeration zone is configured to include multiple described child partition.
4. sewage biological treatment system as claimed in claim 3, it is characterised in that described anaerobic zone and/or arrange submersible agitator in described anoxic zone, arranges aerator and carries out aeration in described aerobic zone.
5. sewage biological treatment system as claimed in claim 3, it is characterised in that be correspondingly arranged on the first aerating system, the second aerating system and the 3rd aerating system that can independently control in described anaerobic zone, anoxic zone and aerobic zone respectively；Control the aeration rate aeration rate more than described second aerating system of described 3rd aerating system, and control the aeration rate aeration rate more than or equal to the first aerating system of described second aerating system.
6. sewage biological treatment system as claimed in claim 5, it is characterised in that the aeration tube of the first aerating system, the aeration tube of the second aerating system and the aeration tube of the 3rd aerating system are all basically perpendicular to the water (flow) direction in aeration zone and arrange.
7. the sewage biological treatment system as described in claim 5 or 6, it is characterised 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, it is characterised in that the aeration tube of described 3rd aerating system is aeration flexible pipe, and the aperture of the solarization air cap of this aeration flexible pipe 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 aeration tube of described aeration zone is basically parallel to the water (flow) direction in aeration zone and arranges in described process pond, described aeration tube includes corresponding respectively to the Part I of anaerobic zone, anoxic zone and aerobic zone, Part II and Part III, the aeration rate of described Part III is higher than the aeration rate of described Part II, and the aeration rate of described Part II is more than the aeration rate of described Part I.
10. sewage biological treatment system as claimed in claim 9, it is characterized in that, the density of the solarization air cap that the density of the solarization air cap that the Part I of described aeration tube is arranged and/or aperture are arranged less than the Part II of described aeration tube and/or aperture, the density of the solarization air cap that the density of the solarization air cap that the Part III of described aeration tube is arranged and/or aperture are arranged more than the Part II of described aeration tube and/or aperture.
11. sewage biological treatment system as claimed in claim 10, it is characterised in that the aperture of the solarization air cap of this aeration tube is less than or equal to 5mm；In the Part III of described aeration tube, every meter of aeration tube is covered with at least 200 described solarization air caps.
12. sewage biological treatment system as claimed in claim 1 or 2, it is characterised in that described biofilm packing is denitrogenation filler.
13. sewage biological treatment system as claimed in claim 12, it is characterised in that described denitrogenation filler is arranged to snakelike arrangement in described child partition.
14. sewage biological treatment system as claimed in claim 12, it is characterised in that the spacing between described denitrogenation filler is 80mm to 250mm.
15. sewage biological treatment system as claimed in claim 1 or 2, it is characterised in that the dissolved oxygen concentration of described anaerobic zone is 0-0.2mg/L, and the dissolved oxygen concentration of described anoxic zone is 0-0.5mg/L, and the dissolved oxygen concentration of described aerobic zone is 0.3-8.0mg/L.
16. sewage biological treatment system as claimed in claim 1 or 2, it is characterised 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 system as claimed in claim 16, it is characterised in that the activated sludge concentration being suspended in sewage in described aeration zone is 2g/L-5g/L.
18. sewage biological treatment system as claimed in claim 1 or 2, it is characterized in that, described lifting zone is provided with air plug-flow system, described air plug-flow system by passing into air to the aerating system of described sewage biological treatment system so that described lifting zone liquid level promote.
19. sewage biological treatment system as claimed in claim 18, it is characterised in that arranging the second partition wall between described aeration zone and described lifting zone, the height of described second partition wall is lower than the height of the elevated liquid level of described lifting zone.
20. sewage biological treatment system as claimed in claim 19, it is characterised in that arrange the height of the elevated liquid level of described lifting zone and the difference in height of the height of described second partition wall, to control the plug-flow flow stream velocity to described aeration zone.
21. sewage biological treatment system as claimed in claim 2, it is characterised in that be provided with fluid course in each described first partition wall.
22. sewage biological treatment system as claimed in claim 1 or 2, it is characterised in that be provided with sludge-water separating system in described mud-water separation district, described sludge-water separating system includes two the 3rd partition walls tilted, and puts multiple precipitation filling between two the 3rd partition walls.
23. sewage biological treatment system as claimed in claim 1 or 2, it is characterized in that, the plurality of child partition is followed successively by anaerobic zone, anoxic zone and aerobic zone according to water (flow) direction, or it is anaerobic zone and aerobic zone, or it is anoxic zone and aerobic zone, or it is anaerobic zone, anoxic zone, aerobic zone, anoxic zone and aerobic zone, or is anoxic zone, aerobic zone, anoxic zone and aerobic zone.
24. sewage biological treatment system as claimed in claim 1 or 2, it is characterised in that the sewage handled by described sewage biological treatment system is: the COD of sewage is more than or equal to 6000mg/L, and the ammonia nitrogen concentration of sewage is more than or equal to 200mg/L.
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| CN104986917B (en) * | 2015-06-29 | 2017-04-05 | 西安理工大学 | Landscape type integrated effluent disposal system |
| CN106915865B (en) * | 2015-12-26 | 2021-02-26 | 苏州汇博龙环保科技有限公司 | High-concentration total nitrogen wastewater denitrification ABP process and equipment |
| CN106915864A (en) * | 2015-12-26 | 2017-07-04 | 江苏博凯环境科技有限公司 | A kind of dyeing waste water Treated sewage reusing ABP Processes and apparatus |
| CN106145543A (en) * | 2016-08-23 | 2016-11-23 | 湖南中南水务环保科技有限公司 | A kind of town sewage advanced purification process |
| CN107140786A (en) * | 2017-05-25 | 2017-09-08 | 清水源（上海）环保科技有限公司 | A kind of biology sewage treatment equipment |
| CN107973401B (en) * | 2017-11-28 | 2019-11-12 | 南京高新工大生物技术研究院有限公司 | A kind of wastewater treatment equipment and its application in processing ammonia nitrogen waste water |
| CN108358315A (en) * | 2018-04-26 | 2018-08-03 | 瑞盛环境股份有限公司 | Reduce the biology multiplication sewage-treatment plant and its processing method of denitrifying carbon source demand |
| 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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