Internal circulation moving bed bio-reactor
The utility model relates to a kind of moving-bed bioreactor, relates in particular to a kind of internal circulation moving bed bio-reactor of high-efficient denitrification and dephosphorization.
The municipal sewage plant not only needs to have the function of removing organic pollutant, but also need have the function of denitrogenation dephosphorizing.In many sewage water treatment methods, biochemical process since have power consumption less, advantage such as secondary pollution is light, working cost is low, be most widely used.A kind of especially biochemical process efficiently of MBBR sewage treatment process.Moving-bed bioreactor belongs to the biomembrance process water technology, the density and the water of the microbe carrier that it adopts are approaching, under the situation of aeration or stirring, move with current, collision between producing mutually, prolong the mass transfer route, improved mass transfer effect, make the microbial film that is attached on the carrier have thin, the active high characteristics of rete simultaneously, organism had very strong absorption degradation ability, and can effectively remove ammonia nitrogen in the sewage, but traditional moving-bed bioreactor dephosphorization scarce capacity.In recent years, samll cities and towns' sewage disposal is flourish, emerges multiple integrated water technology.But because traditional moving-bed bioreactor, the deficiency aspect denitrification denitrogenation, dephosphorization has limited its popularization.
The utility model content
In order to overcome above-mentioned defective, the purpose of this utility model is to provide that a kind of denitrogenation dephosphorizing function is strong, the internal circulation moving bed bio-reactor of compact construction.
In order to achieve the above object, internal circulation moving bed bio-reactor of the present utility model comprises reactor body, and described reactor body inside is provided with anaerobic zone, aerobic zone and settling region; Be filled with a certain amount of carrier in described anaerobic zone, the aerobic zone; Described anaerobic zone is disposed with annular water distributor from bottom to top, is provided with the water inlet overflow weir that carrier promotes distribution device and is communicated with aerobic zone; Described annular water distributor connects water-in; Be provided with submersible agitator and aerating apparatus in the aerobic zone; Be communicated with between described aerobic zone and the settling region; Described settling region is provided with water outlet; Described anaerobic zone bottom is provided with the carrier refluxing opening, and eaves is provided with flow deflector in the described carrier refluxing opening connection carrier retrieving arrangement, described carrier refluxing opening.
Wherein, the tail end of described aerobic zone is provided with outlet, and described outlet is communicated with the water outlet overflow weir, and the outlet of described water outlet overflow weir connects water leg, and described water leg is through being communicated with described settling region communicating pipe.
Described carrier-recovering device lower end links to each other with eaves on the refluxing opening, and is tilted at an angle, and its upper end is higher than the water surface.The spray water tap is set near the upper end of this carrier-recovering device.
Above-mentioned structure, pending sewage enters anaerobic zone 1 by annular water distributor 4, be provided with the device 5 that is used to promote and distributes carrier in the anaerobic zone 1, be provided with carrier refluxing opening 6 in the bottom of anaerobic zone 1, be provided with carrier and water inlet overflow weir 7 at the top of anaerobic zone 1, the carrier 15 that is back to anaerobic zone 1 enters aerobic zone 2 with water inlet by overflow weir 7.Aerobic zone 2 bottoms are provided with aerating apparatus 8 and submersible agitator 9 along water (flow) direction, at the tail end of aerobic zone 2 carrier-recovering device 11 and spray water tap 10 are set, and are used for carrier of separating 15 and mud mixture, and are provided with water outlet overflow weir 13 and water leg 12.Water leg 12 is connected by communicating pipe 14 with the settling region, and mud mixture enters the settling region through communicating pipe 14.Settling region 3 adopts the arrangement form that is total to wall with aerobic zone 2, to reducing the construction costs.
Because moving-bed bioreactor has characteristics such as efficient, energy-conservation, that operation and maintenance are easy, be particularly suitable for sewage work of samll cities and towns and use.This moving-bed can provide the growing environment that is more suitable for for microorganism, makes it when possessing traditional moving-bed bioreactor advantage, and intensified anti-nitrated function and increase phosphorus removal functional more help applying of this technology.
Description of drawings
Fig. 1 is the structural representation of the utility model specific embodiment.
Fig. 2 be among Fig. 1 along A-A to the sectional structure synoptic diagram.
Fig. 3 be among Fig. 1 along B-B to the sectional structure synoptic diagram.
Description of drawings: anaerobic zone 1, aerobic zone 2, settling region 3, annular water distributor 4, dedicated carrier promotes and partitioning device 5, carrier refluxing opening 6, carrier and water inlet overflow weir 7, aerating apparatus 8, submersible agitator 9, spray water tap 10, carrier-recovering device 11, water leg 12, water outlet overflow weir 13, communicating pipe 14, carrier 15.
Below in conjunction with drawings and Examples the utility model is described in further detail.
As Figure 1-3, internal circulation moving bed bio-reactor of the present utility model comprises anaerobic zone 1, aerobic zone 2, settling region 3, and anaerobic zone 1, aerobic zone 2 are filled carrier 15.Anaerobic zone 1 is provided with annular water distributor 4 and dedicated carrier promotes and assigned unit 5, and this device is furnished with 1 grade or multistage lifting impeller.Anaerobic zone 1 bottom is provided with carrier refluxing opening 6, and opening length is the 1/4-1/2 of anaerobic zone girth, and width is 0.5m-2m, and eaves is provided with flow deflector in the carrier refluxing opening 6.Anaerobic zone 1 top is provided with carrier and water inlet overflow weir 7, and weir length is the 1/2-1 of anaerobic zone girth.
Aerobic zone 2 long-width ratios are 1: 1-3: 1, and the bottom is provided with aerating apparatus 8, and oxygen and hybrid power are provided.Aerobic zone 2 head ends link to each other with anaerobic zone 1 overflow weir 7, and tail end and anaerobic zone 1 carrier refluxing opening 6 join.Aerobic zone 2 goes out head piece and is located at this district's tail end, and mud mixture enters water leg 12 by overflow weir 13, enters settling region 3 through communicating pipe 14.Perforated plastic plate or fabric are installed as the carrier-recovering device 11 that separates water outlet and carrier to the zone between the refluxing opening 6 near aerobic zone 2 overflow weirs 13 head end places, carrier-recovering device 11 is in tilted layout, the upper end exceeds aerobic zone 2 liquid levels, the lower end links to each other with eaves on the refluxing opening 6, spray water tap 10 being set, utilize the pressure water of its ejection to disperse the carrier of building up in carrier-recovering device 11 head ends 15 near carrier-recovering device 11 upper ends.Can or submersible agitator 9 be set according to the practical situation setting in the aerobic zone 2.Settling region 3 adopts the rectangular sedimentation tank form, and settling region 3 one sides and aerobic zone 2 be wall altogether.
In the present embodiment, carrier 15 is filled in reactor anaerobic zone 1 and aerobic zone 2, and cyclic motion therein, the microorganism that carrier 15 surface attachment are a large amount of.Anaerobic zone 1 play intensified anti-nitrated with release the effect of phosphorus, aerobic zone 2 plays the effect of degradation of organic substances, nitrated, part denitrification, dephosphorization, carrier of separating 15 and current, settling region 3 plays the effect that separates excess sludge and water outlet.
Working process is as follows: sewage mixes with the carrier 15 that flows into from anaerobic zone 1 bottom through specific equipment 5 liftings from anaerobic zone 1 annular water distributor 4 inflow reactors, and the microbial film adsorb organic compound carries out anti-nitration reaction.Along with the rising of current and the lifting of 5 pairs of carriers 15 of specific equipment, oxygen in the anaerobic zone 1 and nitric nitrogen also reduce along with the increase of height, produce absolute anaerobic environment in the anaerobic zone 1, and microorganism is efficiently released phosphorus.After sewage and carrier rise to anaerobic zone 1 top, under the help of distribution device 5, flow into aerobic zone 2.Be provided with densely arranged aerating apparatus 8 in the aerobic zone 2, for the microbiological deterioration organism provides sufficient oxygen, and quicken carrier 15 and current mix the consequently content of organism, ammonia nitrogen, phosphorus decline in the sewage, the part anti-nitration reaction takes place, carrier 15 surface biological film fast updating.After current and carrier 15 entered the carrier-recovering device 11 of aerobic zone 2 tail ends, carrier 15 descended, and current rise, carrier 15 is back to anaerobic zone 1 bottom, current are dispensed to settling region 3 through overflow weir 13, thereby realize mud-water separation, and excess sludge and water outlet enter the subsequent disposal unit respectively.The material of described carrier-recovering device 11 is perforated plastic plate or fabric.
Above-mentioned structure, compared with prior art, internal circulation moving bed bio-reactor has the following advantages:
The tradition moving-bed bioreactor is higher than general activated sludge process to organic removal efficient, but its shortcoming is that the denitrogenation dephosphorizing effect is relatively poor, and especially dephosphorization aspect often need just can make sewage disposal up to standard by physico-chemical process.Internal circulation moving bed bio-reactor is when keeping traditional moving-bed bioreactor efficient degradation organism characteristics, for polyP bacteria has been created the growing environment that aerobic and absolute anaerobism alternates, help polyP bacteria growth, release phosphorus and poly-phosphorus, the dephosphorization ability of reactor is obviously improved, and the denitrifying capacity of reactor is strengthened.
Internal circulation moving bed bio-reactor is provided with partition wall between aerobic zone and anaerobic zone, obviously reduced oxygen and shifted the destruction of anaerobic zone anaerobic environment and the oxygen loss of aerobic zone, has improved the working efficiency of aerobic zone and anaerobic zone simultaneously, reduces reactor volume.
Internal circulation moving bed bio-reactor is integrated in anaerobic zone, aerobic zone, settling region among the same device, reduces floor space, reduces laid down cost, and simplifies flow process, reduces hydraulic loss, can save running cost.
The utility model is not limited to above-mentioned embodiment, no matter do any variation on its shape or structure, every to utilize above-mentioned internal circulation moving bed bio-reactor all be a kind of distortion of the present utility model, all should think and drop within the utility model protection domain.