CN215161374U - Hydrolysis acidification and anaerobic composite ABR reactor - Google Patents
Hydrolysis acidification and anaerobic composite ABR reactor Download PDFInfo
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- CN215161374U CN215161374U CN202023265542.1U CN202023265542U CN215161374U CN 215161374 U CN215161374 U CN 215161374U CN 202023265542 U CN202023265542 U CN 202023265542U CN 215161374 U CN215161374 U CN 215161374U
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Abstract
The utility model provides a hydrolytic acidification and anaerobic composite ABR reactor, which comprises a three-grid or four-grid rectangular tank body, a water collecting tank in the tank body, a baffling partition wall, a guide plate, a flow guide slope, a silt discharge pipe, a tail end water collecting channel, at most three down-flow channels formed between adjacent grids through the baffling partition wall, a muddy water inlet pipe in a first grid and an up-flow anaerobic water distributor connected with the muddy water inlet pipe; each grid is provided with a water collecting tank and a sediment discharge pipe, and the rest grids except the first grid are provided with a guide plate and a guide slope; when the device works, the mixed liquid in the pool does reciprocating motion of rising flow → falling flow → next rising flow so as to realize hydrolytic acidification and anaerobic composite reaction. The utility model has the advantages of simple flow, excellent hydraulic flow state, no filler, no stirrer, energy conservation, high activated sludge concentration, low ORP, more acid production, more phosphorus release, high anaerobic reaction efficiency, simple operation management, low cost and the like.
Description
Technical Field
The utility model relates to a sewage anaerobism biochemical treatment technical field, concretely relates to compound ABR reactor of hydrolytic acidification and anaerobism.
Background
The biochemical treatment of sewage is the most widely applied sewage treatment method in the world, wherein AAO (abbreviation of Anaerobic aerobic Oxic, also called A) is the most efficient and relatively simplest method2O) denitrification and dephosphorization process technology, and anaerobic hydrolysis acidification reaction tank technology or anaerobic baffled plate (ABR) reaction tank technology, will be the upgrading or the senior component of AAO process flow again, so the utility model discloses a hydrolysis acidification and anaerobic compound ABR reactor technology is the situation needs, and is trending, is the innovative technological progress of sewage treatment and takes place. At present, the utility model is successfully applied to sewage treatment projects of 2 cities or test areas in China, and other projects of a plurality of cities and towns (including industrial park sewage treatment plants) are being applied and implemented.
In recent years, two different technologies, namely an upflow anaerobic sludge blanket hydrolytic acidification reaction tank and an anaerobic baffling plate (ABR) reaction tank, are increasingly applied to industrial enterprise production wastewater treatment or industrial park centralized sewage treatment, mainly because the sewage has complex pollution components, large water quality difference, difficult biochemical degradation of organic pollutants and large change of water quality and water quantity along with time, and the adoption of anaerobic hydrolytic acidification pretreatment can obviously improve the biodegradability of the wastewater, balance the water quality and water quantity and ensure continuous, stable and efficient operation of subsequent aerobic biochemical treatment. Therefore, the emphasis of the anaerobic reaction is to improve the biodegradability of wastewater. In the anaerobic treatment process of the AAO anaerobic/anoxic/aerobic denitrification and dephosphorization process, the function of the anaerobic reaction partially coincides with that of the anaerobic reaction, but the emphasis is on the pretreatment of biological dephosphorization. Obviously, the anaerobic hydrolysis acidification reaction and the conventional anaerobic reaction have both commonality and individuality, and the anaerobic hydrolysis acidification reaction and the conventional anaerobic reaction have the combination possibility as the anaerobic biochemical treatment of the sewage.
At present and in future, along with the increasing requirements of people on the effluent quality of sewage treatment, the sewage treatment process will appear as follows: the biochemical property of the wastewater is obviously improved, carbon sources in the wastewater are utilized as much as possible by simultaneous nitrogen and phosphorus removal, the removal rate of the nitrogen and phosphorus removal is even close to the limit, the final sludge production amount is reduced as much as possible (the sludge amount can be reduced by hydrolytic acidification), and the strict effluent quality target is required to be achieved with the lowest energy consumption. Therefore, in the whole process flow of sewage treatment, anaerobic hydrolysis acidification reaction is firstly carried out, and then conventional anaerobic reaction is carried out, namely two anaerobic processes are connected in series, which is very necessary. However, if the two anaerobic reactions are arranged in steps one after the other, and then the subsequent anoxic/aerobic treatment processes are performed, the whole process flow falls into a complicated state, the energy consumption is obviously increased, and the engineering design, the civil engineering structure and the operation management are all more complicated, so that the arrangement of the two anaerobic reactions in steps one after the other is not the best method. Therefore, if the two can be effectively, simply and organically fused and combined into a whole, more obvious beneficial effects can be brought. Therefore, the utility model discloses it comes to the birth.
Before the utility model, a great amount of creative work has been done by the predecessors, but the creative work still has the defects, and the problems of high efficiency and simplicity required by the actual engineering are not fundamentally solved.
In the ABR reactor hydrolysis acidification printing and dyeing wastewater process (publication No. CN 106045027A, publication No. 2016.10.26, hereinafter referred to as prior art 1), three partition plates are arranged in a reactor of the ABR reactor hydrolysis acidification printing and dyeing wastewater process, the reactor is divided into four reaction zones, the effluent of the last reaction zone enters a sedimentation tank, and the precipitated sludge flows back to a water inlet end through a sludge pump. The reaction zone has the following five points: firstly, the temperature is difficult to control at 20-35 ℃, secondly, all stirrers are required to be installed in each reaction zone, thirdly, stirrers are required to be installed below a first partition plate and a third partition plate, fourthly, the operation of each stirrer is controlled to have a complex time period, and fifthly, a sedimentation tank is required to be arranged immediately after the stirrers to carry out mud-water separation on effluent and return 15-45% of sludge. The process is complex, the energy consumption is high, the sludge concentration in the reaction zone is not easy to control, the adaptability is narrow, if the process is used for nitrogen and phosphorus removal for treating town sewage or industrial park wastewater with low C/N ratio, the subsequent conventional anaerobic treatment is required to be connected, so that 2 more structures (namely an ABR tank and a sedimentation tank, and then an AAO tank) are required, the equipment is various, the energy consumption is high, the stirring control is complex, and the 2 anaerobic treatments cannot be simply, conveniently and efficiently integrated.
In a patent of 'a hydrolysis acidification system with a compact structure' (publication No. CN 206109169U, publication No. 2017.04.19, hereinafter referred to as prior art 2), a hydrolysis acidification region is uniformly provided with a plurality of flow pushers for pushing water flow to move in a single direction along the axial direction, a sedimentation region arranged on the side of the hydrolysis acidification region is used for separating mud from water and returning the mud, and the mud is sucked by a mud scraping and sucking machine which does linear reciprocating motion. The electromechanical equipment (impeller, stirring device, sludge scraping and sucking machine, pump valve system of sludge pump room, etc.) of this system is more, and power consumption is great, and the chance that equipment broke down is also more, and this compact hydrolysis acidification system pool type is difficult to closely combine with subsequent conventional anaerobism/oxygen deficiency reaction tank, consequently in four aspects such as civil engineering, area, energy saving and consumption reduction and operation management, technical and economic advantage is not obvious, can't accomplish simple and efficient integration with aforementioned 2 kinds of anaerobic treatment.
Our country's patent "a sewage plant hydrolysis acidification reactor of industrial park" (publication No. CN 107337280A, published 2017.11.10, hereinafter for short prior art 3), its reactor is separated into 5 check rooms, and the sedimentation effect of heavy pond is still originally still in the first check room when hydrolysis acidification, and 4 check rooms in the back all carry elastic filler, and 4 check rooms lean on preceding bottom to be equipped with many mud pipes 11 and many aeration pipes 12, and the afterbody of 4 check rooms is equipped with the axillary angle (the angle is 40 ~ 60 degree). The 1 st cell of the reactor is found to be difficult to form uniform ascending flow in practice, and a short flow phenomenon exists; the elastic filler of the back 4 cells can be hardened and lose efficacy usually in about three years, a plurality of sludge discharge pipes 11 and a plurality of aeration pipes 12 at the bottoms of the 4 cells are complicated and inconvenient in daily use, the huge axillary angle of reinforced concrete at the tail part has large civil engineering quantity, and the most important is that the reactor can not be used as a conventional anaerobic reaction tank in an AAO process, and the 2 anaerobic treatments can not be efficiently fused.
Aiming at the problem that the conventional anaerobic reaction cannot be considered in all the hydrolysis acidification reactors, a simple, efficient and reliable hydrolysis acidification and anaerobic composite ABR reactor is needed to be created, and the ABR reactor has the characteristics of simple structure, uniform water distribution, stable flow state, no dead angle, no filling material blockage and replacement, high sludge concentration, difficult loss of large-particle and heavy-particle sludge, capability of circulating small-particle or flocculent anaerobic sludge in an AAO activated sludge system, low total head loss, one-arrow double-carving of hydrolysis acidification and anaerobic reaction and the like, and can conveniently remove sediment at the bottom of a tank to avoid long-term sedimentation, prevent water flow from short flow, channeling and upwelling, remarkably improve the volume utilization rate, fully contact the anaerobic activated sludge bed with sewage, and ensure that the anaerobic biochemical treatment effect meets the final effluent standard requirement.
Based on the background and a plurality of defects of various known technologies, the requirement of high-quality treatment of urban sewage on a preposed anaerobic new technology is more and more obvious at present, so that the tendency that the hydrolysis acidification and anaerobic composite ABR reactor technology is integrated into a global mainstream AAO denitrification and dephosphorization sewage treatment technology is very close, and in future, the hydrolysis acidification and anaerobic composite ABR reactor technology is expected to become an advanced component of the AAO technology, so the utility model discloses a hydrolysis acidification and anaerobic composite ABR reactor technology is in line with the trend of the era, is more the requirement of sewage treatment technology progress, and makes important contributions in the aspects of high-quality effluent of sewage treatment, energy conservation and consumption reduction, civil engineering cost saving, land use saving, operation cost reduction, convenient operation management and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical scheme that the problem that exists adopts as follows:
hydrolysis acidification and anaerobic compound ABR reactor, its characterized in that: the ABR reactor comprises a three-grid or four-grid rectangular tank body which is respectively a first grid chamber, a second grid chamber, a third grid chamber and a fourth grid chamber, wherein the first grid chamber 1 contains an external return sludge pipe 6 and a water inlet pipe 5, the water inlet pipe 5 is connected with 1 upflow anaerobic water distributor 7, and the ABR reactor further comprises a water collecting tank 8, a baffling partition wall 9, a guide plate 10, a guide slope 11, a tail end water collecting channel 12 and a silt discharging pipe 13; at most three down-flow channels are formed between each adjacent cell of the three-cell or four-cell through a baffling partition wall 9; when the device runs, the flowing direction of the activated sludge mixed liquor is sequentially a first grid chamber 1 → a second grid chamber 2 → a third grid chamber 3 → a fourth grid chamber 4, and the first grid chamber 1 is provided with inlet mud, the last grid chamber is provided with mixed liquor outflow, each grid chamber is provided with an upper water collecting tank 8 and a bottom mud discharging pipe 13, and the rest grid chambers except the first grid chamber are provided with a guide plate 10 and a guide slope 11.
The upflow anaerobic water distributor 7 sprays water downwards and forms uniform upflow by means of the reflection at the bottom of the tank.
The upflow anaerobic water distributor 7 comprises a large-caliber tee joint positioned in the middle, the central tee joint of the tee joint faces upwards and is in butt joint with a water inlet pipe, the other two horizontal outlets are respectively connected with a horizontal tee joint, the other three branch outlets of the tee joint are respectively connected with a pair of small-caliber tee joints facing downwards and a horizontal medium-caliber tee joint, two sides of the medium-caliber tee joint are horizontally connected with two medium-caliber tee joints facing downwards, the water outlets of each small-caliber tee joint and the medium-caliber tee joint are connected with nozzles, the nozzles are all sprayed towards the bottom of the tank, and the positions of the bottom of the tank corresponding to the nozzles are all provided with diffusion cone caps.
The water surface of each cell is provided with a plurality of parallel water collecting grooves 8, ascending water flow is uniformly and intensively collected, and the number of the water collecting grooves 8 of each cell is the same.
The flow-down channel is formed between the baffling partition wall 9 and the partition wall of the tank body, and the ratio of the width of the flow-down channel to the width of the flow-up grid chamber is 1: 6-9.
Except the first cell, each cell is provided with a guide plate 10 and two guide slopes 11.
The silt discharging pipe 13 at the bottom layer of each cell is arranged at the downstream position of the center and is parallel to the direction of the guide plate 10.
The hydrolysis acidification and anaerobic composite ABR reactor comprises the following working steps:
The utility model realizes the purpose through innovative technical means and unprecedented simple and direct process.
Firstly, the innovative multi-point position multi-thread upper and lower surface distribution corresponding technology is utilized, namely, the upflow type small-resistance anti-clogging anaerobic water distributor 7 applied at the same time is utilized, the water collecting tank 8 forms a perfect combination in one step, and in addition, the water columns spray and spread to the bottom of the pool, the water flow entering the bottom of the pool is rapidly and uniformly distributed to the bottom layer of the whole pool, meanwhile, a plurality of densely parallel water collecting tanks 8 are arranged on the water surface to be matched with and collect the water flow, so that the overall uniformity of upflow in the pool is ensured, the short flow phenomenon that the water flow directly approaches the way due to the high-load weir top and the centralized outflow of the first compartment partition wall (other compartments have the same problems) in the prior art 3 can not occur, and even the effluent can absorb and carry away the anaerobic sludge in the pool or can not form anaerobic sludge with higher concentration at all.
And secondly, innovative technologies such as 'hydraulic elutriation' and 'self-concentration' are utilized to help the sludge concentration to increase, the dominant bacteria are gradually enriched, dead angles in the reactor are eliminated in an all-round mode, meanwhile, water flow is smoother, hydraulic automatic classification and sludge automatic layering are formed, and the purpose of sludge self-concentration is achieved. The utility model creatively adopts a three-slope mode in the second cell 2 and the following cells for the first time, wherein 1 guide plate 10 and 2 opposite guide slopes 11 form a large V-shaped structure, hydraulic dead angles are completely eliminated, the bottom flow rate is obviously higher than the middle upper part, the risk of sludge deposition and decay and sediment deposition at corners is eliminated, and simultaneously, based on the principles of 'hydraulic elutriation' and 'self-concentration', the utility model adopts relatively high hydraulic load parameters, so that the configuration can automatically lead large-particle anaerobic activated sludge and heavy-particle anaerobic activated sludge to be in the lower layer, the small-particle sludge and flocculent sludge to be in the middle layer, and the water outlet weir load is reduced because of specially arranging a plurality of water collecting tanks to ensure that the upflow flow state is smooth and uniform, the whole tank not only automatically carries out hydraulic classification, but also ensures that the hydrolytic acidification sludge with higher concentration is gathered in the reaction tank, and the conventional anaerobic activated sludge can be lost to a biochemical reaction tank of the next process (namely self-balancing) when the total sludge concentration reaches a certain higher value, so that the conventional anaerobic activated sludge brought out by a water flow can complete the subsequent processes of denitrification dephosphorization, denitrification, aerobic phosphorus absorption and the like in an anoxic zone, and an anaerobic → anoxic → aerobic → anaerobic cycle is formed, wherein part of sludge after full phosphorus absorption is discharged out of the system in the form of residual sludge to realize the final phosphorus removal of the system.
Third, an unprecedented short-cut process is embodied as follows: compared with the prior art 1-prior art 3, the utility model discloses utilize the special construction of aforementioned big V style of calligraphy ingeniously, under the guide of hydraulics software simulation calculation result, only need to establish a silt in each check room and get rid of pipe 13, this pipe is located big V style of calligraphy downstream direction, only need to open the valve (being located the pond outside) on silt gets rid of pipe 13 regularly according to the amount of silt content in the sewage in order to realize inside and outside water pressure difference hydrodynamic force and arrange the sand, also need not to set up the air aeration pipe and carry out forced aeration stirring to bottom mud, do not have pool bottom siltation to block up worry; meanwhile, no filler is required to be installed in the pool, so that the filler is not easy to harden and replace; in addition, a mechanical stirrer is not arranged in the tank, and the permanent driving force for preventing sludge deposition and sedimentation comes from the height difference of the water surface between the adjacent chambers, and the height difference is determined by the height of the weir crest of the water collecting tank during design and construction, and additional power is not needed, so that the innovative design simplifies the actual operation, really realizes maintenance-free or extremely-few maintenance, has obvious energy-saving effect and directly brings operation management benefits.
Through the technical creativity, the advancement and the practicability of the three aspects, the utility model satisfactorily achieves the purposes, and the working process and the principle are not complex, even very simple and clear.
The working process and the principle of the utility model are as follows: after the sewage enters the plant and passes through the conventional pretreatment processes of the grating → the water pump lifting → the fine grating → the grit chamber, the sewage and the external reflux sludge from the subsequent secondary sedimentation tank enter the ABR tank through the pipeline, under the action of a large amount of anaerobic microorganisms under higher sludge concentration, organic pollutants and activated sludge containing rich organic matters in the sewage are subjected to anaerobic hydrolysis acidification fermentation biochemical reaction to generate soluble easily biodegradable organic matters (rbCOD), particularly low molecular weight Volatile Fatty Acids (VFAs) which are used as carbon sources capable of being quickly utilized by microorganisms, and meanwhile, the oxidation-reduction potential (ORP) of a lower layer large V-shaped area of the ABR tank can be as low as-400 to-250 mV, phosphorus bacteria can fully release phosphorus in cells under the deep anaerobic environment (a foundation is laid for the excessive absorption of phosphorus under the subsequent anoxic and oxygen-rich environments to be beneficial to the subsequent biochemical reaction to smoothly realize the biological phosphorus removal function), after the reaction, the activated sludge mixed liquid enters a subsequent working section from the water collecting channel at the tail end of the ABR tank, and the biochemical reaction processes of denitrification, dephosphorization, organic pollutant degradation and the like are continuously carried out. Afterwards, activated sludge mixed liquid partly gets into two heavy ponds and carries out mud-water separation under the action of gravity, and the supernatant liquor of formation overflows or continues to carry out the advanced treatment, and the concentrated sludge of two heavy pond bottoms then sends back through outer backward flow sludge pump and arrives the utility model discloses the ABR pond is held, and a small part is then carried sludge dewatering processing system with the excess sludge form through the excess sludge pump, realizes the purpose that biological phosphorus removal rich mud got rid of from the system, handles back mud cake outward transportation and deals with.
The utility model discloses ABR reactor, its technical originality, technical reliability and showing technical advantage embody in following three aspect:
one is the technical originality is found in the following 3 points:
1 from static state to dynamic state, from single to composite technical originality-since the first proposal of the concept of hydrolysis acidification in our country and the invention of corresponding process technology in the 80 s of the last century, the hydrolysis acidification technology is always relatively static (the latest national environmental protection standards of 2 parts of our country, namely, the technical specifications of sewage treatment engineering of upflow anaerobic sludge bed reactor (HJ 2013-2012) and the technical specifications of sewage treatment engineering of hydrolysis acidification reactor (HJ 2047-2015)) i.e. the anaerobic activated sludge is always in a relatively static state in the lower layer of the pool and only the sewage or only the sludge is hydrolyzed and acidified independently, while the utility model discloses a dynamic or turbulent hydrolysis acidification with relatively high upward flow velocity is carried out on both the sewage and the external reflux activated sludge at the same time, and anaerobic sludge with different densities and different particle sizes is distributed in the whole pool (the upper layer of the prior art is almost clear water The upper layer does not contain activated sludge), and the most simple and energy-saving ABR reactor provided by the utility model is adopted for carrying out composite reaction, which belongs to the original creation in China;
2, relatively high hydraulic load is adopted, and the technical originality is embodied, namely the prior art is lower hydraulic load to avoid the anaerobic sludge from being washed away and lost, but the utility model discloses the reason that needn't worry anaerobic sludge loss is because the mud still can be come from constantly flowing back because of source, and because big V-shaped structure mud concentration can reach the self-balancing under certain range load. The utility model discloses a relatively higher hydraulic load has at least triplex purpose, both avoid producing acid gathering and appear methanation and be consumed a part rbCOD or VFAs by self, realized that the rbCOD or VFAs that will hydrolyze acidizing and generate goes out for the used target of follow-up reaction through automatic "elutriation" of hydraulic action, also be in order to improve the productivity or reduce the pond volume simultaneously, still avoid mud or silt deposit and corruption or jam, also need not use the mixer to prevent mud or silt deposit and corruption or jam, reached the purpose of simplifying equipment, simplified operation management, energy-conserving operation and reduction sewage treatment cost, can kill many things at one stroke;
3 is an excellent technical originality of upflow type hydraulics flow state, especially the effective water distribution of the bottom layer and the balanced and dense water collection of the water surface layer, two-phase cooperation, which greatly improves the effective volume ratio, obviously increases the total amount or concentration of the sludge in the reaction tank, not only exerts the excellent characteristics of the upflow type anaerobic water distributor, but also ingeniously utilizes the large V-shaped structure of the triclinic surface, causes the rising flow velocity of different elevation cross sections to be different, and can effectively intercept the anaerobic sludge hydrolyzed and acidified while realizing hydraulic screening and grading, while the conventional anaerobic activated sludge is taken out by the water flow, and the taken-out anaerobic sludge passes through the subsequent anoxic A tank → the aerobic O tank → the secondary sedimentation tank sludge external reflux pump → the ABR reactor of the utility model is started, circulated and repeated, thereby ensuring that the ABR reactor of the utility model can contain sufficient anaerobic hydrolyzed and acidified sludge and conventional anaerobic activated sludge, "from concentrated" and outer backward flow mud constantly supply arrive the utility model discloses the ABR reactor makes it can maintain enough high sludge concentration, and then ensures that two kinds of anaerobic reaction effect all reach satisfactory degree.
In a word, the technical originality is that two anaerobic reaction functions are deeply fused, and two function pool types are combined into one, and two anaerobic biochemical reactions with different functions are simultaneously carried out in the reactor: the anaerobic hydrolysis acidification reaction and the conventional anaerobic (phosphorus release and biological adsorption) reaction are carried out, and the effect is satisfactory.
Secondly, the technical reliability is realized in the following 3 points:
the adopted upflow principle and technical parameters are very reliable, and the upflow principle and the technical parameters are proved by anaerobic sewage treatment practices for many years and are listed in the 2 national standards, so that the technical reliability is sufficient;
2 is the structure form of the ABR reactor of the utility model is very reliable, because, the upflow type small resistance anti-clogging anaerobic water distributor 7, the guide plate 10, the guide slope 11, the silt discharge pipe 13 which are positioned at the bottom layer, the water collecting tank 8 which is positioned at the water surface layer, the vertical baffling partition wall 9 and the like, the material is corrosion resistant, the structure is simple and firm, the construction is easy, no driving motor is needed, and non-precise devices are needed, only the quality control is needed to be carried out according to the current relevant standards of the state, and the reliability is undoubted;
3 is the utility model discloses the design of ABR reactor is built and is installed the operation very reliably, does not have the detail of secret puzzling, more does not have the concept that obscures and understands, and the construction drawing surveyability is clear can, technical reliability on the skip paper. In a word, the utility model discloses the ABR reactor only needs the good civil engineering quality of management and control and installation engineering quality, follows the operating specification, is stable, reliable when the operation, can use for a long time.
Thirdly, the obvious technical advantages are embodied in the following 3 points:
the ABR reactor has good anaerobic sludge interception capability, when interception reaches saturation, redundant sludge can automatically overflow from a water surface water collecting tank 8 to a next cell until a tail end water collecting channel of a last cell, and then enters a subsequent biochemical system for treatment and finally flows back;
2, in the processes of hydrolytic acidification and anaerobic reaction, mechanical stirring or air stirring is not needed to be arranged at the lower layer, and a filler is not needed to be arranged at the upper layer in a water tank; the whole pool has simple structure, few internal devices, easy civil engineering and installation, simple operation and maintenance, and can be conveniently integrated into the whole process flow (such as A)2O, UCT, UMIF and other processes) is favorable for the sewage treatment to remove nitrogen and phosphorus, and the effluent finally reaches the standard in high quality on the whole;
3, the technical advantages of the method can be conveniently converted into economic advantages, and the method is characterized by obvious energy-saving effect, low construction cost, saved construction land, low operation cost and wide application range.
The utility model discloses ABR reactor has following four most obvious beneficial effect:
1. the efficiency of anaerobic hydrolytic acidification and conventional anaerobic reaction is improved: the ABR reactor of the utility model has no forced stirrer, no over-mixing can occur, 3-4 levels of chambers are added, so that the anaerobic sludge interception capability is strong, the sludge concentration is high, in addition, an up-flow anaerobic water distributor 7 is adopted to diffuse water distribution to the periphery of the bottom of the tank, a down-flow down channel is matched with the large V-shaped structure reflection water distribution of three inclined planes, a plurality of intensive parallel water collecting grooves 8 on the water surface collect water flow, each chamber of the reactor is in integral uniform up-flow, the up-flow state is stable, sewage is fully and fully contacted with a sludge bed, the effective volume utilization rate is obviously improved, the number of microorganisms participating in the reaction is increased, the anaerobic biochemical reaction efficiency is improved, the most obvious beneficial effect is that the oxidation-reduction potential (ORP) of the large V-shaped area of the lower layer of the tank after the second chamber and the second chamber can be as low as-400 mV to-250 mV, thereby forming a deep anaerobic environment, very be favorable to the abundant phosphorus release of anaerobism mud, in addition higher anaerobism mud concentration is under degree of depth anaerobic environment, hydrolysis acidification reaction rate can show and improve, makes the utility model discloses rbCOD or VFAs concentration in the ABR reactor goes out water, rbCOD or VFAs concentration increase 18 ~ 58mg/L in comparing the intaking, wherein VFAs mainly by acetic acid, propionic acid, mixed acid such as butyric acid constitute, these mixed organic acids will be more favorable to microorganism absorption utilization such as phosphorus-accumulating bacteria denitrifying bacteria than single organic acid, consequently, the utility model discloses the ABR reactor has increased substantially hydrolysis acidification acid production rate, anaerobism phosphorus release rate to final nitrogen and phosphorus removal rate has been improved.
2. The reduction and stabilization of the excess sludge are realized: because the utility model discloses the ABR reactor produces acid many, and the acid yield reaches 18 ~ 58mg/L many (with rbcOD or VFAs concentration meter), these easy quick degradation organic matters all by make full use of in follow-up nitrogen and phosphorus removal process, very obvious beneficial effect has just realized the minimizing and the stabilization of excess sludge for the final excess sludge total amount that discharges of system reduces. Engineering practice of embodiment one shows, the last 3 months hardly arrange the excess sludge outward and the system still stabilizes the operation up to standard, sees sufficiently the utility model discloses the effect of excess sludge fermentation digestion of ABR reactor is amazing, when having obtained excellent score in the development and utilization of internal carbon source, has still practiced thrift sludge treatment's daily cost spending, has finally promoted sewage treatment plant's economic benefits.
3. The reliability and stability of daily operation are improved: the utility model discloses the inside brevity of ABR reactor, operation convenient to use can really accomplish trouble-free, does not block up, does not silt up, non-maintaining. The utility model discloses no mechanical activity operation part in the ABR reactor, no drive motor, it is intake, advance mud and arrange mud control flap and all be located outside the pond, the charge event does not have the filler to harden and change worry, equipment upflow anaerobic water distributor 7 in the pond is the stainless steel pipe fitting preparation, itself is exactly the little resistance and prevents the jam type, and is corrosion-resistant, non-precision, therefore, as long as civil engineering and installation engineering quality accord with the general quality standard requirement of country, regularly get rid of bottom of the pool silt during operation, the system is just reliable and stable undoubtedly, can use for a long time.
4. The energy-saving operation is realized, the smooth connection with the front and the rear working procedures is greatly facilitated, and the adaptability is wide: the utility model discloses ABR reactor head loss is little, and the energy consumption is low, and is not power consumptive alone, and normal atmospheric temperature operation need not the heating and keeps warm to 20 ~ 35 ℃ (compare with prior art 1), and cold area in the north only need make external wall insulation and pool face add the lid can, running cost and construction cost are low, and accommodation is wide, can match follow-up multiple biochemical reaction technique and pond type well. The utility model discloses the total head loss of ABR reactor business turn over water is only about 0.4 ~ 0.6m, and the total head loss that two kinds of anaerobism functions now adopt simple front and back concatenation together all more than 1.5m (the head loss of having considered the two connecting line). If in addition prior art's plug flow stirring energy consumption will surpass far the utility model discloses an actual energy consumption, moreover, the utility model discloses can link up smoothly with the grit chamber delivery port of front end preliminary treatment workshop section, need not water pump secondary pressurization and promote, also need not to build the preliminary treatment facility of very high water level, integrate together very easily with the biochemical pond of follow-up workshop section, so, the utility model discloses the ABR reactor can adapt to normal sewage treatment process flow and hydraulic elevation well. Furthermore, the utility model discloses not only be applicable to the centralized sewage treatment plant in industrial park, also can deal with the current quality of water of intaking that town sewage treatment plant appears now and from now on well and go out the poor problem of scissors that water quality of water requirement improves, can be said to a sword double-row carving, kill many birds with one stone.
Above-mentioned each item technical advantage and beneficial effect fully show, the utility model discloses ABR reactor compares with prior art, and anaerobic hydrolysis acidification reaction and conventional anaerobic reaction's speed is higher, and it is more to produce the acid, and the mud decrement is more showing, and the pond structure retrencies and easily builds, and equipment type is few, takes up an area of and uses a little, and investment cost is economized, and the energy consumption is low, and is with low costs, and operation management is simple and convenient, and the summary sums up to-construction cost and running cost both, all is obviously less than current other similar techniques, consequently, the utility model discloses an application prospect is very wide.
Drawings
FIG. 1 is a main sectional view (section A-A) of the composite ABR reactor for hydrolysis acidification and anaerobic reaction of the present invention.
Figure 2 is a plan view of the lower layer of the tank of the ABR reactor of the present invention.
Fig. 3 and 4 are plan views of the surface layer of the ABR reactor of the present invention with different specification parameters.
FIG. 5 is a cross-sectional view of the ABR reactor of the present invention taken along line B-B.
FIG. 6 is a cross-sectional view of the ABR reactor of the present invention.
Wherein: 1-first grid chamber, 2-second grid chamber, 3-third grid chamber, 4-fourth grid chamber, 5-water inlet pipe, 6-external reflux sludge pipe, 7-upflow type small resistance anti-clogging anaerobic water distributor, 8-water collecting tank, 9-baffling partition wall, 10-guide plate, 11-guide slope, 12-end water collecting channel, and 13-silt discharging pipe.
Detailed Description
In the following, the technical solutions in the embodiments will be further clearly and completely described in conjunction with the drawings of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, those skilled in the art are inspired to design ABR reactors of different sizes without creative efforts. Therefore, changes, improvements, modifications, substitutions, integrations, modifications and the like of the embodiments described herein are all within the scope of the invention without departing from the spirit and principle of the invention.
Example one
Referring to the attached drawings 1, 2, 3, 5 and 6, the ABR reactor of the present invention is adopted as an embodiment in combination with a sewage treatment project in a city of hainan province, and the present invention will be further explained in detail. Thus, the present embodiment provides a practical solution that has been successfully implemented.
It is emphasized that the detailed description of the embodiments is provided to help understand the spirit and intent of the present invention, and should not be construed as limiting the invention. Moreover, in the following description, descriptions of well-known techniques and familiar structures have been omitted from the technical skill in order to avoid unnecessarily obscuring or obscuring the concepts of the present invention.
The scale of sewage treatment in this example was 4 km3D, in order to facilitate the maintenance of the pool or the equipment without stopping production, 2 groups of 4 seats are designed, each seat has 1 ten thousand meters3A biochemical pool, a secondary sedimentation pool, an inclined tube sedimentation pool for advanced treatment and the like of the/d scale series. Wherein, each 1 ten thousand m3The starting end of the/d biochemical pool is provided with 2 seats of 5000m each3The utility model discloses hydrolytic acidification and anaerobic composite ABR reactor/pool of/d. FIG. 1 shows a single seat 5000m3The ABR reaction tank of/d is a main section view (A-A section), the effective water depth of the water tank is 6.30m, the length multiplied by the width is 22.85 multiplied by 5.15m, and the reaction tank is divided into 4 chambers in total.
The first cell 1 is provided with a water inlet pipe 5, an external reflux sludge pipe 6 and a water surface water collecting tank 8, the bottom of the first cell is also provided with an up-flow anaerobic water distributor 7, the water distribution area of which is 20.23m216 water distribution nozzles, the water distribution area of a single nozzle is 1.26m2Meets the national technical specification of upflow anaerobic sludge blanket reactorThe water distribution area of a single water distribution port specified in the technical Specification of Water treatment engineering (HJ2013 and 2012)2(flocculent sludge) and 0.5-2 m2(granular sludge). Be equipped with baffling partition wall 9 in the second check room 2, guide plate 10 and 2 water conservancy diversion slopes 11 in opposite directions, guide plate 10, 2 water conservancy diversion slopes 11's horizontal contained angle is 50, guide plate 10 material is corrosion-resistant stainless steel or plastic slab, water conservancy diversion slope 11 does benefit to mud landing downwards for the smooth inclined plane that the secondary was pour, bottom of the pool center is leaned on the downstream direction and still is equipped with silt and gets rid of pipe 13, the pool face is equipped with the water catch bowl 8 the same with first check room 1 quantity, but the elevation of this water catch bowl will be less than first check room water catch bowl elevation 100mm and can flow into second check room 2 from first check room 1 smoothly in order to ensure that the reaction tank rivers. The third cell 3 and the fourth cell 4 are the same as the second cell 2, but the elevation of the water collecting tank is lowered in sequence, and a tail end water collecting channel 12 is arranged in the fourth cell 4, and the water flow of the cell water collecting tank 8 is collected and then conveyed to a subsequent biochemical treatment unit from the side wall hole for continuous treatment.
FIG. 2 shows a plane of a lower layer of the cell of the present embodiment, FIG. 3 shows a plane of a surface layer of the cell of the present embodiment, FIG. 5 is a sectional view taken along line B-B, and FIG. 6 is a sectional view taken along line C-C. As shown in fig. 1, fig. 2, fig. 3, fig. 5, and fig. 6, the ABR reactor of the present invention includes: the device comprises a first grid chamber 1, a second grid chamber 2, a third grid chamber 3, a fourth grid chamber 4, a water inlet pipe 5, an external reflux sludge pipe 6, an up-flow anaerobic water distributor 7, a water collecting tank 8, a baffling partition wall 9, a guide plate 10, a guide slope 11, a water collecting channel 12 and a sediment discharge pipe 13.
Specifically, the main specification parameters of the hydrolysis acidification and anaerobic composite ABR reactor in this example are as follows:
the net length of the first grid chamber 1, the second grid chamber 2, the third grid chamber 3 and the fourth grid chamber 4 along the overall flow direction of the sewage is 4.70m (no flow reduction chamber, partition wall and the like are contained), and the net width is 4.35m, so that the upflow space can be as large as possible, and the biochemical reaction effects of the upflow hydrolysis acidification reaction and the anaerobic composite reaction can be fully exerted; maximum hydraulic load of 24.5m of upflow chamber3/m2H, its maximum upward flow velocity vOn the upper part＝6.8mm/s；
The total hydraulic retention time HRT of the first grid chamber 1 to the fourth grid chamber 4 is 2.36h, and the reflux ratio of the external reflux sludge is 60-100%.
The water inlet pipe 5 is positioned at the center line of the first cell 1 and enters the first cell 1 from the horizontal direction; the number of the water inlet pipes 5 is 1, and the specification is DN 500;
one end of the external return sludge pipe 6 is connected with the water inlet pipe 5, and the other end is connected with a secondary sedimentation tank sludge pump room of the sewage treatment plant; the number of the external reflux sludge pipes 6 is 1, and the specification is DN 200;
the upflow anaerobic water distributor 7 is connected with the water inlet pipe 5, the upflow anaerobic water distributor 7 is horizontally arranged and supported and fixed by a buttress, all nozzles face downwards, and are in an emptying state after being fixed, and the heights of the nozzles are positioned on the same plane; the number of the upflow anaerobic water distributors 7 is 1, and the specification is DN500-16 nozzle type;
one end of the water collecting tank 8 is fixed on the bracket, the other end of the water collecting tank 8 is fixed in the through-wall hole, the water collecting tank 8 is in a U-shaped groove of a triangular weir, and the groove shape is favorable for flushing floating slag on the water surface from the triangular weir mouth without gathering the floating slag on the water surface to influence the appearance; the number of the water collecting grooves 8 is 28 in total, 7 water collecting grooves are arranged in each grid chamber, the specification is B multiplied by H which is 220 multiplied by 360mm, and the center distance between every two adjacent water collecting grooves is 0.62 m;
the two ends of the baffling partition wall 9 are respectively fixed on the pool walls of the second grid chamber 2, the third grid chamber 3 and the fourth grid chamber 4, the height of the baffling partition wall 9 and the bottom plate of the pool is 1.00m, the distance between the baffling partition wall 9 and the pool walls is 60cm, the 60cm wide down-flow channel space is still used for conventional anaerobic reaction, and is not only a water flow channel but also an anaerobic reaction space, and no waste is caused; the number of the baffling partition walls 9 is 3, and the included angle between the lower deflection angle and the horizontal direction is 50 degrees;
one side of the guide plate 10 is fixed on a lower break angle of the baffling partition wall 9, and the other side is in a suspended state and is provided with 6 tank bottom supporting points to prevent water flow from causing vibration and sludge deposition gravity pressure deformation; the included angle between the guide plate 10 and the horizontal direction is also 50 degrees; the guide plate 10 is made of UPVC plastic, the number of the guide plate is 3 blocks per cell, the specification is L multiplied by B is 4330 multiplied by 1000mm, the thickness is 10mm, and the distance between the guide plate 10 and the bottom of the pool is 400 mm;
the diversion slope 11 is a smooth slope surface formed by secondary pouring concrete and has the functions of eliminating hydraulic dead angles, forming hydraulic channels, changing the direction of water flow and forming a downward sliding slope surface for sludge settlement; the included angle between the flow guiding slope 11 and the horizontal direction is also 50 degrees; the number of the flow guide slopes 11 is 6 per cell, and the height is about 1740-1900 mm;
the tail end water outlet collecting channel 12 is suspended on the wall of the fourth grid chamber 4, the water collecting tank 8 of the fourth grid chamber 4 converges the sludge-water mixed liquid after the anaerobic reaction to enter the water collecting channel 12, and the sludge-water mixed liquid passes through the side wall water outlet holes to reach the biochemical pool of the subsequent treatment unit for continuous treatment;
the sediment discharge pipe 13 is in a perforated sediment discharge pipe form, hydrodynamic sediment discharge is carried out by means of the water pressure difference between the inside and the outside of the reactor, the position of the sediment discharge pipe is arranged in the downstream direction of the center of the bottom of each cell, and the pipe position is parallel to the direction of the guide plate 10, namely is vertical to the direction of the total water flow; the silt is got rid of the material of pipe 13 and is PE100 high density polyethylene plastics feed pipe, and the quantity is 1 total 4 in every check room, and the specification is DN200 to connect the control valve outside the pond.
In the embodiment, the other main technical parameters of the complete core structure of biochemical treatment are formed together with the utility model: oxygen deficiency pond HRT is 3.93h, and aeration good oxygen pond HRT is 6.59h, adopts the lower dissolved oxygen operation of accurate aeration control, the utility model discloses ABR reaction tank + oxygen deficiency pond + good oxygen pond constitute whole biochemical pond total hydraulic retention time HRT is 12.88h, and two heavy ponds and pipe chute sedimentation tank are conventional design, and reflux ratio 250% in the nitrifying liquid, pipe chute sediment mud all retrieval and utilization to oxygen deficiency pond start, and surplus mud only discharges from two heavy ponds.
TABLE 1 actual influent and effluent quality of a wastewater treatment plant of example one
| Item | COD | BOD5 | SS | TN | NH3-N | TP |
| Quality of inlet water (mg/L) | 178 | 55 | 115 | 47.2 | 42.6 | 6.75 |
| Effluent water quality (mg/L) | ≤20 | ≤5 | ≤4 | ≤13 | ≤1.0 | ≤0.5 |
| Treatment efficiency (%) | ≥88.8 | ≥90.9 | ≥96.5 | ≥72.5 | ≥97.7 | ≥92.6 |
(Note: COD-chemical oxygen demand, BOD)5-5 daily biochemical oxygen demand, SS-suspended solids, NH3-N-ammonia nitrogen, TN-total nitrogen, TP-total phosphorus. )
The actual measurement result after the operation is stable shows that: extremely low C/N ratio of influent water, BOD5The nitrogen removal theoretical value/TN is only 1.17 (the nitrogen removal theoretical value is 2.86, the actual value is required to reach 4), the COD/TN is only 3.77, the carbon source is extremely lack of water quality, the theoretical adding amount of sodium acetate is calculated according to 2-3 methods, the calculation result is 160-440 mg/L commercial solid sodium acetate trihydrate, and the effluent can stably reach the standard when only 60-90 mg/L is actually added during the debugging operation. It is thus clear that, adopt the utility model discloses ABR reaction tank technique carries out hydrolytic acidification and anaerobism combined treatment to this low carbon source municipal sewage, and the effect that carbon source development utilized is in fact satisfied in it. Through measurement and calculation, at least 28.9mg/L of rbcOD or VFAs generated by hydrolytic acidification fermentation in the embodiment are used as direct carbon sources, and make important contribution to the synchronous nitrogen and phosphorus removal of the whole process, namely commercial solid sodium acetate of which the external carbon source is at least 72mg/L is saved, particularly, the biological phosphorus removal efficiency is quite unexpected and is obviously higher than the highest value (75 percent, see the total phosphorus TP treatment efficiency parameter value in the current national standard 'outdoor drainage design Specification' GB50014-2006(2016 edition) table 6.6.20) of the national standard), and all indexes of effluent stably reach the national first-class A standard.
The wastewater treatment plant of this example treated every m3The total cost of the direct costs of power consumption (including sewage lifting in the factory), medicine consumption, manpower, overhaul and amortization and the like of the sewage is 0.56 yuan, and compared with the prior art, the construction investment, the occupied area, the operation cost and the like can be saved by about 25 to 30 percent, so the technical and economic benefits of the utility model are very obvious. This practical engineering project adopts the utility model discloses ABR reactor technique has gained good sewage treatment effect and technological economic effect.
Example two
Referring to the attached drawings 1, 2, 4, 5 and 6, the ABR reactor of the present invention is adopted as an embodiment in combination with a sewage treatment project of a certain test area in the hainan province, and the present invention will be further described in detail. Therefore, the embodiment provides a feasible technical scheme which is successfully applied.
The scale of sewage treatment in this example was 8000m3D, in order to facilitate the maintenance of the water pool or equipment without stopping production, the design is divided into 2 seats each of 4000m3The hydrolysis acidification and anaerobic composite ABR reaction tank of/d. FIG. 4 shows a single seat 4000m3The ABR reaction tank of/d has a surface layer plan view, the effective water depth of the water tank is 6.00m, the length multiplied by the width is 15.00 multiplied by 4.58m, and the reaction tank is divided into 3 cells in total.
The first cell 1 is provided with a water inlet pipe 5, an external reflux sludge pipe 6 and a water surface water collecting tank 8, the bottom of the first cell is also provided with an up-flow anaerobic water distributor 7, the water distribution area of which is 17.44m216 water distribution nozzles, the water distribution area of a single nozzle is 1.09m2The water distribution area of a single water distribution port in charge of the water distribution system meets the technical specification of upflow anaerobic sludge bed reactor sewage treatment engineering (HJ 2013-2(flocculent sludge) and 0.5-2 m2(granular sludge). Be equipped with baffling partition wall 9 in the second check room 2, guide plate 10 and 2 water conservancy diversion slopes 11 in opposite directions, guide plate 10, 2 water conservancy diversion slopes 11's horizontal contained angle is 50, guide plate 10 material is corrosion-resistant stainless steel or plastic slab, water conservancy diversion slope 11 does benefit to mud landing downwards for the smooth inclined plane that the secondary was pour, bottom of the pool center is leaned on the downstream direction and still is equipped with silt and gets rid of pipe 13, the pool face is equipped with the water catch bowl 8 the same with first check room 1 quantity, but the elevation of this water catch bowl will be less than first check room water catch bowl elevation 100mm and can flow into second check room 2 from first check room 1 smoothly in order to ensure that the reaction tank rivers. The third cell 3 is the same as the second cell 2, but the elevation of the water collecting tank is decreased in sequence, and a terminal water collecting channel 12 is arranged in the third cell 3, and after collecting the water flow of the cell water collecting tank 8, the water flow is conveyed to the subsequent biochemical treatment unit from the side wall hole for continuous treatment.
The lower plane of the pool of this embodiment can be referred to fig. 2 but has one less cell, fig. 4 shows 3 cells of the plane of the pool surface of this embodiment, fig. 5 is a B-B sectional view, and fig. 6 is a C-C sectional view. As shown in fig. 1, fig. 2, fig. 4, fig. 5, and fig. 6, the ABR reactor of the present invention includes: the device comprises a first grid chamber 1, a second grid chamber 2, a third grid chamber 3, a water inlet pipe 5, an external return sludge pipe 6, an up-flow anaerobic water distributor 7, a water collecting tank 8, a baffling partition wall 9, a guide plate 10, a guide slope 11, a water collecting channel 12 and a sediment discharge pipe 13.
Specifically, the main specification parameters of the hydrolysis acidification and anaerobic composite ABR reactor in this example are as follows:
the net length of the first grid 1, the net length of the second grid 2 and the net length of the third grid 3 along the general flow direction of the sewage are respectively 4.50m, 4.00m and 4.00m (no flow reduction chamber, partition wall and the like are contained), and the net width is 3.875m, so that an upflow space can be realized, and the biochemical reaction effects of upflow hydrolytic acidification reaction and anaerobic composite reaction which are as large as possible can be fully exerted; the highest hydraulic load of the upflow chamber is 22.94-25.81 m3/m2H, its maximum upward flow velocity vOn the upper part＝7.17mm/s；
The total hydraulic retention time HRT of the first grid chamber 1 to the third grid chamber 3 is 1.8h, and the reflux ratio of the external reflux sludge is 66%.
The water inlet pipe 5 is positioned at the center line of the first cell 1 and enters the first cell 1 from the horizontal direction; the number of the water inlet pipes 5 is 1, and the specification is DN 450;
one end of the external return sludge pipe 6 is connected with the water inlet pipe 5, and the other end is connected with a secondary sedimentation tank sludge pump room of the sewage treatment plant; the number of the external reflux sludge pipes 6 is 1, and the specification is DN 200;
the upflow anaerobic water distributor 7 is connected with the water inlet pipe 5, the upflow anaerobic water distributor 7 is horizontally arranged and supported and fixed by a buttress, all nozzles face downwards, and are in an emptying state after being fixed, and the heights of the nozzles are positioned on the same plane; the number of the upflow anaerobic water distributors 7 is 1, and the specification is DN450-16 nozzle type;
one end of the water collecting tank 8 is fixed on the bracket, the other end of the water collecting tank 8 is fixed in the through-wall hole, the water collecting tank 8 is in a U-shaped groove of a triangular weir, and the groove shape is favorable for flushing floating slag on the water surface from the triangular weir mouth without gathering the floating slag on the water surface to influence the appearance; the number of the water collecting grooves 8 is 21 in total, 7 water collecting grooves are arranged in each grid chamber, the specification is B multiplied by H, which is 190 multiplied by 330mm, and the center distance between every two adjacent water collecting grooves is 0.55 m;
the two ends of the baffling partition wall 9 are respectively fixed on the pool walls of the second grid chamber 2 and the third grid chamber 3, the height of the baffling partition wall 9 and the pool bottom plate is 1.00m, the distance between the baffling partition wall 9 and the pool walls is 50cm, and the 50 cm-wide downflow type hydraulic channel space is still used for conventional anaerobic reaction, is not only a water flow channel, but also a reaction space and does not form any waste; the number of the baffling partition walls 9 is 2, and the included angle between the lower deflection angle and the horizontal direction is 50 degrees;
one side of the guide plate 10 is fixed on a lower break angle of the baffling partition wall 9, and the other side is in a suspended state and is provided with 5 tank bottom supporting points to prevent water flow from causing vibration and sludge deposition gravity pressure deformation; the included angle between the guide plate 10 and the horizontal direction is also 50 degrees; the guide plate 10 is made of UPVC plastic, the number of the guide plate is 2 blocks per cell, the specification is L multiplied by B (3860 multiplied by 1100 mm), the thickness is 10mm, and the distance between the guide plate 10 and the bottom of the pool is 350 mm;
the diversion slope 11 is a smooth slope surface formed by secondary pouring concrete and has the functions of eliminating hydraulic dead angles, forming hydraulic channels, changing the direction of water flow and forming a downward sliding slope surface for sludge settlement; the included angle between the flow guiding slope 11 and the horizontal direction is also 50 degrees; the number of the flow guide slopes 11 is 4 per cell, and the height is about 1700-1900 mm;
the tail end water collecting channel 12 is suspended on the pool wall of the third grid chamber 3, the water collecting tank 8 of the third grid chamber 3 converges the sludge-water mixed liquid after the anaerobic reaction to enter the water collecting channel 12, and the sludge-water mixed liquid passes through the side wall water outlet hole to the subsequent processing unit for continuous processing;
the sediment discharge pipe 13 is in a perforated sediment discharge pipe form, hydrodynamic sediment discharge is carried out by means of the water pressure difference between the inside and the outside of the reactor, the position of the sediment discharge pipe is arranged in the downstream direction of the center of the bottom of each cell, and the pipe position is parallel to the direction of the guide plate 10, namely is vertical to the direction of the total water flow; the silt is got rid of the material of pipe 13 and is PE100 high density polyethylene plastics feed pipe, and the quantity is 1 total 3 in every check room, and the specification is DN200 to connect the control valve outside the pond.
In the embodiment, the other main technical parameters of the complete core structure of biochemical treatment are formed together with the utility model: the oxygen deficiency pond HRT is 4.38h, and aeration good oxygen pond HRT is 7.17h, the utility model discloses ABR reaction tank + oxygen deficiency pond + good oxygen pond constitute whole biochemical pond total hydraulic retention time HRT 13.35h, and two heavy ponds and pipe chute sedimentation tanks are conventional design, and the reflux ratio 216% in the nitrifying liquid, pipe chute sediment mud all retrieval and utilization to the oxygen deficiency pond beginning, and surplus mud only discharges from two heavy ponds.
Table 2 actual influent and effluent quality for the sewage treatment plant of example two, see the following table:
| item | COD | BOD5 | SS | TN | NH3-N | TP |
| Quality of inlet water (mg/L) | 163 | 50 | 96 | 44.8 | 38.9 | 5.99 |
| Effluent water quality (mg/L) | ≤20 | ≤5 | ≤4 | ≤11 | ≤0.5 | ≤0.4 |
| Treatment efficiency (%) | ≥87.7 | ≥90 | ≥95.8 | ≥75.4 | ≥98.7 | ≥93.3 |
The actual measurement result after the operation is stable shows that: extremely low C/N ratio of influent water, BOD5The nitrogen removal theoretical value/TN is only 1.12 (the nitrogen removal theoretical value is 2.86, the actual value is required to reach 4), the COD/TN is only 3.64, the carbon source is extremely lack of water quality, the theoretical adding amount of sodium acetate is calculated according to 2-3 methods, the calculation result is 170-450 mg/L commercial solid sodium acetate trihydrate, and the effluent can stably reach the standard under the condition that only 70-100 mg/L is actually added during the debugging operation. It is thus clear that, adopt the utility model discloses ABR reaction tank technique carries out hydrolytic acidification and anaerobism combined treatment to this low carbon source test area garden sewage, and the effect that carbon source development utilized is in fact satisfied in it. Through measurement and calculation, at least 24mg/L of rbcOD or VFAs generated by hydrolytic acidification fermentation in the embodiment are used as direct carbon sources, and important contribution is made to synchronous nitrogen and phosphorus removal of the whole process, namely commercial solid sodium acetate with at least 60 mg/L of external carbon sources is saved, particularly, the biological phosphorus removal efficiency is quite unexpected and is obviously higher than the highest value (75 percent) of the national standard, namely, the total phosphorus in the table 6.6.20 of the national standard 'outdoor drainage design standard' GB50014-2006(2016 edition)TP treatment efficiency parameter value), each index of the effluent stably reaches the national first-class A standard.
As described above, the present invention can be preferably realized by skillful conception, overall calculation, and detailed design.
The water depth difference of each grid chamber of the ABR reactor of the utility model is very small, and the hydraulic flow state is basically the same. When the sand-removing device works, except that a little sediment deposition possibly exists at the bottom of the second grid chamber 2 for a long time, the sediment deposition in the other 2 grid chambers is little, but in actual operation, a valve on a pipeline of the sediment removing pipe 13 is opened to remove the sediment and observe so as to determine how often the interval is opened. In addition, the utility model discloses the operation of ABR reactor is very simple and direct, can be in unmanned on duty state usually, only need on duty personnel regularly observe each check room go out rivers exist unusual can, consequently, the utility model discloses high efficiency, high reliability, energy-conservation and the minimum running cost of ABR reactor show undoubtedly.
Can see from two above embodiments, the utility model discloses the urban domestic sewage of low C/N ratio not only can be handled to the ABR reactor, can also handle the mixed waste water of the biochemical production life in all kinds of gardens, need not to add in addition complicated processing structures and can directly reach national one-level A standard. Therefore, compared with other sewage treatment process methods, the utility model has the advantages of simple process, low construction cost and low operation cost.
To sum up, the utility model discloses the design of ABR reactor is ingenious, novel, unique, simple and direct, firm, and the engineering implementation nature is strong, on function and performance characteristics, can take place hydrolysis acidification fermentation and conventional anaerobism biochemical reaction, reduces external carbon source input volume and need not to throw even and add external carbon source, can realize again that denitrification dephosphorization and denitrification denitrogenation "a carbon dual-purpose" go on in step, can also obviously reduce final surplus sludge production volume. The utility model discloses ABR reactor technique, its excellent hydraulic characteristic has not only strengthened biochemical reaction mass transfer effect, and reaction rate very improves, and the operation is very energy-conserving moreover to the electromechanical device. In addition, the reactor has the advantages of simple structure, strong modularity and easy collaborative design by combining with a subsequent biochemical treatment module, so the reactor has universal applicability, the civil engineering quantity of the whole sewage treatment project is reduced, the construction cost is obviously saved, and the reactor has wide market application prospect. If the utility model discloses in the wide application to the construction of town sewage treatment or the centralized sewage treatment project of industrial park, not only can practice thrift the huge construction fund of several in hundred million yuan, can also practice thrift considerable operation power consumption and carbon source consumption cost every year, make huge contribution for global carbon emission decrement, consequently, the utility model discloses a macroscopic and microcosmic economic benefits, environmental benefit and social are all very showing.
Finally, it should be noted that: the above description is only a preferred embodiment of the hydrolysis acidification and anaerobic composite ABR reactor of the present invention, and is not intended to limit the present invention, and it is still possible for those skilled in the art to modify the technical solutions of the embodiments of the present invention, or to make equivalent substitutions on some technical features thereof, and any modifications, equivalent substitutions, improvements, etc. made should be included in the scope of the present invention.
Claims (7)
1. Hydrolysis acidification and anaerobic compound ABR reactor, its characterized in that: the ABR reactor comprises a three-grid or four-grid rectangular tank body, a first grid chamber, a second grid chamber and a third grid chamber respectively, and further comprises a fourth grid chamber, wherein the first grid chamber contains a muddy water inlet pipe and an up-flow anaerobic water distributor connected with the muddy water inlet pipe; at most three down-flow channels are formed between each two adjacent cells through baffling partition walls; when the activated sludge separator operates, the flowing direction of the activated sludge mixed liquor is sequentially first grid chamber → second grid chamber → third grid chamber, the four-grid rectangular tank body finally flows to the fourth grid chamber, and forms each main body grid chamber through the descending flow type channel communication to be in ascending flow type flowing direction, the first grid chamber is provided with water inlet and mud inlet, the last grid chamber is provided with mixed liquor outflow, each grid chamber is provided with an upper water collecting tank and a bottom mud discharging pipe, and all the rest grid chambers except the first grid chamber are provided with a guide plate and a guide slope.
2. The composite hydrolytic acidification and anaerobic ABR reactor of claim 1, wherein: the upflow anaerobic water distributor sprays water downwards and forms uniform upflow by means of the reflection at the bottom of the tank.
3. The composite hydrolytic acidification and anaerobic ABR reactor of claim 1, wherein: the upflow anaerobic water distributor comprises a large-caliber tee joint positioned in the middle, the central tee joint of the tee joint faces upwards and is in butt joint with a water inlet pipe, the other two horizontal outlets are respectively connected with a horizontal cross joint, the other three branch outlets of the cross joint are respectively connected with a pair of downward small-caliber tee joints and a horizontal medium-caliber tee joint, two sides of the medium-caliber tee joints are horizontally connected with two downward medium-caliber tee joints, the water outlets of each small-caliber tee joint and the medium-caliber tee joints are connected with nozzles, the nozzles spray towards the bottom of the tank, and the positions of the bottom of the tank corresponding to the nozzles are provided with diffusion cone caps.
4. The composite hydrolytic acidification and anaerobic ABR reactor of claim 1, wherein: the water surface of each cell is provided with a plurality of parallel water collecting grooves, ascending water flow is uniformly and intensively collected, and the number of the water collecting grooves of each cell is the same.
5. The composite hydrolytic acidification and anaerobic ABR reactor of claim 1, wherein: the flow-down channel is formed between the baffling partition wall and the cell body partition wall, and the ratio of the width of the flow-down channel to the width of the flow-up cell chamber is 1: 6-9.
6. The composite hydrolytic acidification and anaerobic ABR reactor of claim 1, wherein: except the first grid chamber, the rest grid chambers are provided with a guide plate and two guide slopes.
7. The composite hydrolytic acidification and anaerobic ABR reactor of claim 1, wherein: the silt discharging pipe at the bottom layer of each cell is arranged at the downstream position of the center and is parallel to the direction of the guide plate.
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| GR01 | Patent grant |