CN201777960U - Sectional water inlet biological denitrification and sludge reduction coupling bioreactor - Google Patents
Sectional water inlet biological denitrification and sludge reduction coupling bioreactor Download PDFInfo
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- CN201777960U CN201777960U CN2010202565846U CN201020256584U CN201777960U CN 201777960 U CN201777960 U CN 201777960U CN 2010202565846 U CN2010202565846 U CN 2010202565846U CN 201020256584 U CN201020256584 U CN 201020256584U CN 201777960 U CN201777960 U CN 201777960U
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Abstract
A sectional water inlet biological denitrification and sludge reduction coupling bioreactor belongs to the field of sewage treatment. Biological sewage treatment technology has the shortcomings of high sludge output and poor total nitrogen removing effect for sewage with low carbon-nitrogen ratio. The sectional water inlet biological denitrification and sludge reduction coupling bioreactor sequentially comprises a bioreaction area and a secondary settling tank; the bioreaction area sequentially includes an aerobic area O-I, an anaerobic area A-I, an aerobic area O-II, an anaerobic area A-II, an aerobic area O-III, an anaerobic area A-III and an aerobic area O-IV; the volume ratio of each aerobic area to each anaerobic area ranges from 1.5:1 to 2:1; porous carriers are placed inside the bioreaction area; the carrier filling volume ratio of each aerobic area ranges from 40% to 60%; the carrier filling volume ratio of each anaerobic area ranges from 90% to 100%; and each area is provided with a baffle plate. The reactor includes three water inlet sections; the secondary settling tank is provided with a water outlet pipe and a sludge discharge pipe; and returned sludge is pumped to the aerobic area O-I. The total nitrogen (TN) removal rate of the bioreactor is 75.3%, the chemical oxygen demand (COD) removal rate of the bioreactor is 94.3%, and the sludge yield of the bioreactor is 0.102kgMLSS/kgCOD.
Description
Technical field
The utility model relates to a kind of segmental influent coupling bioreactor, doses porous support and has biological denitrificaion and mud decrement effect, belongs to sewage treatment area.
Background technology
Along with the Chinese society rapid economy development, improving constantly of industrialization and urbanization degree, water environment pollution of China and water quality eutrophication situation are more and more serious, many water body in lake can not be brought into play its normal function and seriously influence industrial or agricultural and fish production, more and more seriously hamper the development of Chinese national economy.Nitrogen is the principal pollutant that cause body eutrophication, and is particularly important to the control of total nitrogen content in the sewage of discharging.Dirty water living creature processing technique is being brought into play enormous function always in the sewage purification process, but that one of its main shortcoming is a sludge yield is big, and sludge treatment and ultimate disposal need a large amount of initial costs and high working cost.According to statistics, China municipal sewage plant has exceeded thousand at present, and national dried matter sludge output is about 8000t/d, and wet mud is about 40000t/d (water ratio 80%), along with the raising of wastewater treatment rate and degree of treatment must be deepened sludge yield and also will further increase.There is the mud more than 90% to can not get handling timely and effectively, disposing at present, much has the Sewage Plant of sludge treatment facility also not have the place to store mud, thereby cause the secondary pollution of mud.Therefore, from improving wastewater treatment efficiency, reducing excess sludge production still from reducing cost, reducing working cost that sludge treatment disposes and all need to carry out municipal effluent biological denitrificaion and mud decrement control device, Study on Process.
In biological denitrification process, segmental influent and biological denitrification technology is the biological denitrificaion novel process of developing fast in recent years, the advantage of this technology is that required pond appearance is less, nitric efficiency is high, operational management is convenient, topmost be exactly organic substrates along the pond long uniform distribution, on the processing low carbon-nitrogen ratio sewage, can make full use of sewage carbon source, be beneficial to denitrifying carrying out, and load balancing, promptly reduced the gap between oxygen supply speed and the oxygen consumption rate to a certain extent, help cutting down the consumption of energy, can give full play to the degradation function of microorganism in the mud again.
The theoretical basis of sludge reduction, in the ordinary course of things, the anabolism of microorganism is that the katabolism by respiratory rate control and substrate carries out link coupled, and when respiratory rate reduced, uncoupling will take place for katabolism and anabolism, at this moment, microorganism is used for anabolic energy and reduces in oxidation substrates, and self resultant velocity slows down, the yield coefficient of apparent microorganism reduces, and sludge yield reduces.Under anaerobism, the aerobic environment that alternately changes, the apparent yield coefficient of microorganism reduces.This is because aerobic microbiological can not be used for anabolism immediately at the ATP that aerobic section produced, but keeps and can be consumed in the anaerobism section conduct that substrate lacks.
Add porous support in reactor after, along with former water enters reactor, the effect of wandering about as a refugee impels solid-liquid separation, suspended substance (SS), excess sludge in the water entered in the porous support internal clearance and accumulates.Organism that accumulates or mud become the nutritive ingredient of microorganisms such as bacterium in the carrier, decompose and remove through anaerobism, the anoxic oxygen metabolism of becoming reconciled, thereby with mud decompose, degraded; Adopt combined type to wander about as a refugee the aerobic-anaerobism Fourier Series expansion technique of ball porous microbial carrier owing to there is the coupling of the aerobic-anaerobic environment on many spaces, various microorganism survival environment is provided, thereby the microorganism of carrier surface growth can make the dissolved organic matter matter in the sewage efficient the decomposition sludge yield be reduced by biooxidation reactions, create such process of wandering about as a refugee and various microbial metabolism repeated multiple times and take place, reach the effect that sludge quantity reduces.When former water carbon-nitrogen ratio is low, utilize segmental influent can make full use of carbon source limited in the former water, the denitrification effect of raising is advanced the nitrogen removal rate that face improves system.
The utility model content
The purpose of this utility model is for solving the low problem of clearance of the big and total nitrogen of sludge of sewage treatment plant output, from improving wastewater treatment efficiency and reducing two technical elements of sludge yield, from reducing the economic aspect of cost and saving energy consumption and running cost, research, this device of utility model also can reach denitrification effect preferably when carrying out mud decrement.
A kind of segmental influent and biological denitrification and sludge decrement coupling bioreactor is characterized in that: comprise bio-reaction zone and second pond successively; Bio-reaction zone comprises aerobic zone O-I, oxygen-starved area A-I, aerobic zone O-II, oxygen-starved area A-II, aerobic zone O-III, oxygen-starved area A-III, aerobic zone O-IV successively, each aerobic zone and oxygen-starved area volume ratio are 1.5: 1～2: 1, the inner placing porous carrier of bio-reaction zone, aerobic zone carrier admission space ratio is 40%～60%; Oxygen-starved area carrier admission space ratio is 90%～100%; Each district is all if the traverse baffle of the water inlet of top, every district, top water outlet;
Reactor divides three sections water inlets, and three water inlet pipes are located at aerobic zone O-I, oxygen-starved area A-I, oxygen-starved area A-II respectively, and second pond sets out water pipe and shore pipe, and returned sluge is by being pumped to aerobic zone O-I.
Porous support, its outside surface are the rigid spherical shell of one deck, and sphere is vesicular, a large amount of fritter high voidage carriers of inner filling, and the characteristics of carrier possess hydrophilic property, permeability, high-specific surface area, good materialization stability, the carrier voidage is greater than 0.9.
The sludge yield of this reactor is lower than activated sludge process and biomembrance process, has better sewage disposal usefulness especially denitrification efficiency and lower energy consumption and good mud decrement effect.
Coupling bioreactor according to the segmental influent denitrogenation principle and the principles of construction of wandering about as a refugee, by it being carried out analysis of experiments more than a year, analyze the major influence factors that improves wastewater treatment efficiency and mud decrement effect, draw optimal operating parameter, and combine with reactor process design, improve the performance of reactor comprehensively.This reactor is except having some common features of segmental influent denitrification process and biofilm reactor, such as the denitrification percent height, there is not the sludge bulking problem in microorganism set growth, a series of advantages such as hydraulic detention time and SRT are separated, and also have following characteristics:
1) has good bio-denitrifying sewage and mud decrement effect simultaneously.Former moisture enters into reactor for three sections, and the oxygen-starved area water inlet can make full use of the readily biodegradable COD in the former water, for denitrification provides carbon source, improves denitrification efficient.In addition, the oxygen-starved area water inlet, a large amount of carbon source utilized of denitrification consumption, the carbon source utilized that therefore enters follow-up aerobic zone is less, and the growth of heterotrophic bacterium is restricted, and is beneficial to the growth of autotrophy nitrifier.And owing to added porous support in the reactor, after former water enters, owing to wander about as a refugee and the bioadhesion effect, suspended substance in the former water etc. enters into spherical porous carrier inside, and sponge carrier is caught, is accumulated in the suppressed by vector, have higher microorganism concn, help cultivation and the growth of long nitrifier generation time, so reactor has good denitrification effect.Simultaneously organism accumulate in carrier, thereby ferment makes mud liquefaction and degraded and make that mud decomposes, decrement, and decomposes the degraded organism of generation, provides biological denitrificaion required carbon source, advances the denitrification effect of a raising reactor; Behind the reactor aerobic zone, because along direction from liquid to multiple porous support inside, the complicated microflora that has formed the aerobic type that suspends, adhered to aerobic type, adheres to facultative type, adheres to anaerobic type, has good SND (synchronous nitration and denitrification effect), thereby further denitrogenation, thereby have good bio-denitrifying sewage and mud decrement effect.
2) have environment diversity and species diversity on the space.Form aerobic zone and anaerobic zone coupled environment repeatedly successively along the flow direction of water, the microorganism that is fit to is respectively distinguished in growth respectively, cause biophase to change, form the species diversity of height and various microbial ecological system, make that the food chain of microorganism is longer, cause the minimizing with excess sludge of successively decreasing of energy.
3) biomass height, shock resistance are strong.Higher microorganism concn is arranged, except porous support surface growth microbial film, a large amount of microorganisms of accumulation, the microorganism of suspension growth in addition in the porous support space; In the porous microbial carrier sewage disposal, even there is objectionable impurities to sneak into, just be blocked down, and can not take place in full section at leading portion; Because of microorganism growth in carrier, the concentration height, and solid particulate is captured in the carrier, so there is strong adaptive faculty in system to the load change of sewage.
4) sludge retention time and dwell time of sewage are separable.In conventional activated sludge process, mud and sewage form mixed solution and flow out.Sludge retention time is short, and mud is difficult to be decomposed, and sludge yield is big.And present technique because porous support holds back, catches mud granule, prolongs sludge retention time, and mud granule is easy to be liquefied, degraded and decompose.
5) be easy to installation and existing sewage work upgrading, expense is low.Fluidised form is a pulling flow type, and spherical combined type porous support can directly be thrown in and need not to fix, supporting structure, has the advantages that initial cost is economized, running cost is low and excess sludge production is few.
Description of drawings
Fig. 1 is the utility model segmental influent and biological denitrification and sludge decrement coupling bioreactor and process principle figure thereof.
Among the figure, 1-raw water box, 2-water suction pump, 3-water inlet pipe, 4-aeration head, 5-thief hole, 6-porous support, 7-returned sluge, 8-rising pipe, 9-second pond, 10-pneumatic pump, O-I, O-II, O-III, O-IV-aerobic zone, A-I, A-II, A-III-oxygen-starved area.
Embodiment
The utility model utility model comprises bio-reaction zone and second pond 9 successively; Bio-reaction zone comprises aerobic zone O-I, oxygen-starved area A-I, aerobic zone O-II, oxygen-starved area A-II, aerobic zone O-III, oxygen-starved area A-III successively, aerobic zone O-IV, each aerobic zone and oxygen-starved area volume ratio are 1.5: 1～2: 1, the inner placing porous carrier 6 of bio-reaction zone; Aerobic zone carrier admission space ratio is 40%～60%; Oxygen-starved area carrier admission space ratio is 90%～100%; Each district all establishes traverse baffle, thereby makes every district be top water inlet, top water outlet.
Reactor divides three sections water inlets, three water inlet pipes 3 are located at aerobic zone O-I, oxygen-starved area A-I, oxygen-starved area A-II respectively, the water outlet of bio-reaction zone enters second pond 9 and discharges through rising pipe 8, and returned sluge 7 is by being pumped to aerobic zone O-I, and excess sludge is discharged by shore pipe.
The technology of the biological reaction apparatus that application is stated may further comprise the steps:
Former moisture enters into aerobic zone O-I, oxygen-starved area A-I, oxygen-starved area A-II respectively for three sections, and assignment of traffic was than 1: 1: 1～3: 4: 3, and hydraulic detention time HRT=11～14h, aerobic zone dissolved oxygen concentration are 2.5～4mg/L.The water outlet of bio-reaction zone enters second pond and discharges through rising pipe, and the mud backflow volume is than R=0.5～1.5, and returned sluge is by being pumped to aerobic zone O-I, and excess sludge is discharged by shore pipe.
Reactor is provided with two aeration tubes at each aerobic zone.Laterally be provided with 7 thief holes at each reaction zone, the water outlet thief hole is taken from the aeration tank rising pipe in addition.The height of thief hole is apart from reactor bottom surface 30cm, and all thief hole apertures are 1cm.
Embodiment 1, the carrier of filling in reactor are spherical porous carrier, and its spherical shell is that PVC is injection molded, and it is latticed that sphere is, its diameter is 10cm, filling out the length of side in the ball is the cubic sponge carrier of 1.5cm, and its voidage is 1: 1: 1 greater than 0.9 at segmental influent assignment of traffic ratio, hydraulic detention time HRT=11h, dissolved oxygen DO=2.5～3.0mg/L, backflow volume is during than R=0.5, and influent ammonia nitrogen is 85mg/L, the water outlet ammonia nitrogen is 4.8mg/L, and clearance is 94.4%; The water outlet nitric nitrogen reaches 20.2mg/L; Water inlet TN is 110mg/L, and water outlet TN is 27.2mg/L, and the TN clearance is 75.3%; Water inlet COD is 330mg/L, and water outlet COD is 19.2mg/L, COD clearance 94.3%.The reactor sludge yield is 0.102kgMLSS/kgCOD, reduces 75% than conventional activated sludge method sludge yield 0.4kgMLSS/kgCOD, and the decrement effect is remarkable.
Embodiment 2, the carrier of filling in reactor are spherical porous carrier, and its spherical shell is that PVC is injection molded, and it is latticed that sphere is, its diameter is 10cm, filling out the length of side in the ball is the cubic sponge carrier of 1.5cm, and its voidage is 3: 4: 3 greater than 0.9 at segmental influent assignment of traffic ratio, hydraulic detention time HRT=14h, dissolved oxygen DO=3.0～4.0mg/L, backflow volume is during than R=1.5, and influent ammonia nitrogen is 82mg/L, the water outlet ammonia nitrogen is 2.5mg/L, and clearance is 96.7%; The water outlet nitric nitrogen reaches 16.7mg/L; Water inlet TN is 105mg/L, and water outlet TN is 22.2mg/L, and the TN clearance is 78.9%; Water inlet COD is 303mg/L, and water outlet COD is 13.9mg/L, COD clearance 95.4%.The reactor sludge yield is 0.071kgMLSS/kgCOD, reduces 82.3% than conventional activated sludge method sludge yield 0.4kgMLSS/kgCOD, and the decrement effect is remarkable.
The sludge yield of this reactor is lower than activated sludge process and biomembrance process, has better sewage disposal usefulness and lower energy consumption and good mud decrement effect, and is easy to installation, is fit to newly-built and existing sewage work upgrading.
Claims (2)
1. segmental influent and biological denitrification and sludge decrement coupling bioreactor is characterized in that: comprise bio-reaction zone and second pond successively; Bio-reaction zone comprises aerobic zone O-I, oxygen-starved area A-I, aerobic zone O-II, oxygen-starved area A-II, aerobic zone O-III, oxygen-starved area A-III, aerobic zone O-IV successively, each aerobic zone and oxygen-starved area volume ratio are 1.5: 1～2: 1, the inner placing porous carrier of bio-reaction zone, aerobic zone carrier admission space ratio is 40%～60%; Oxygen-starved area carrier admission space ratio is 90%～100%; Each district is all if the traverse baffle of the water inlet of top, every district, top water outlet;
Reactor divides three sections water inlets, and three water inlet pipes are located at aerobic zone O-I, oxygen-starved area A-I, oxygen-starved area A-II respectively, and second pond sets out water pipe and shore pipe, and the second pond bottom is connected to aerobic zone O-I.
2. bio-reactor according to claim 1 is characterized in that: the porous support outside surface is the rigid spherical shell of one deck, and sphere is vesicular, a large amount of fritter high voidage carriers of inner filling, and the carrier voidage is greater than 0.9.
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| CN2010202565846U CN201777960U (en) | 2010-07-02 | 2010-07-02 | Sectional water inlet biological denitrification and sludge reduction coupling bioreactor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941776A (en) * | 2010-07-02 | 2011-01-12 | 北京工业大学 | Step-feed biological nitrogen removal and sludge reduction coupling bioreactor and process thereof |
| CN104591504A (en) * | 2015-01-29 | 2015-05-06 | 北京万邦达环保技术股份有限公司 | Multistage non-reflux powdered activated carbon bioactive sewage treatment device |
| CN104609671A (en) * | 2015-01-29 | 2015-05-13 | 北京万邦达环保技术股份有限公司 | Multistage reflux powdered activated carbon bioactive sewage treatment device |
| CN104609670A (en) * | 2015-01-29 | 2015-05-13 | 北京万邦达环保技术股份有限公司 | Improved powdered activated carbon biological sewage denitrification and dephosphorization treatment device |
-
2010
- 2010-07-02 CN CN2010202565846U patent/CN201777960U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941776A (en) * | 2010-07-02 | 2011-01-12 | 北京工业大学 | Step-feed biological nitrogen removal and sludge reduction coupling bioreactor and process thereof |
| CN104591504A (en) * | 2015-01-29 | 2015-05-06 | 北京万邦达环保技术股份有限公司 | Multistage non-reflux powdered activated carbon bioactive sewage treatment device |
| CN104609671A (en) * | 2015-01-29 | 2015-05-13 | 北京万邦达环保技术股份有限公司 | Multistage reflux powdered activated carbon bioactive sewage treatment device |
| CN104609670A (en) * | 2015-01-29 | 2015-05-13 | 北京万邦达环保技术股份有限公司 | Improved powdered activated carbon biological sewage denitrification and dephosphorization treatment device |
| CN104609670B (en) * | 2015-01-29 | 2017-01-04 | 北京万邦达环保技术股份有限公司 | Improved sewage denitrification and dephosphorization treatment device for powdered activated carbon biological treatment |
| CN104609671B (en) * | 2015-01-29 | 2017-01-11 | 北京万邦达环保技术股份有限公司 | Multistage reflux powdered activated carbon bioactive sewage treatment device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110330 Termination date: 20130702 |