CN101486511B - Air lift intermittent internal circulation denitrification dephosphorization sewage treatment process and apparatus - Google Patents
Air lift intermittent internal circulation denitrification dephosphorization sewage treatment process and apparatus Download PDFInfo
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- CN101486511B CN101486511B CN2009100105750A CN200910010575A CN101486511B CN 101486511 B CN101486511 B CN 101486511B CN 2009100105750 A CN2009100105750 A CN 2009100105750A CN 200910010575 A CN200910010575 A CN 200910010575A CN 101486511 B CN101486511 B CN 101486511B
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Abstract
The invention discloses an airlift intermittent internal recycling, de-nitration and dephosphorization sewage treatment technology and a device thereof; the sewage treatment technology comprises the steps: a biochemical tank is divided into an aeration area and a non-aeration area by a deflector; an aeration system is arranged at the bottom of the aeration area and internally provided with stuffing materials and membrane modules; the non-aeration area is internally provided with stuffing materials, and an inlet water pipe and a back-flush system are respectively arranged in the middle and the bottom of the non-aeration area; a mud guiding slope is arranged at the bottom of the non-aeration area, and a mud pipe is arranged at the bottom of the mud guiding slope; the running mode of intermittent water inflow and continuous water outflow is adopted, so that the liquid level of a reactor always changes between high liquid level and low liquid level, thus realizing that mixed solution can be periodically exchanged between the aeration area and the non-aeration area, and leading the aeration area to keep aerobic environment all the time so as to carry out aerobic nitrification reaction; the non-aeration area is in the alternating environment of anaerobic and anoxia so that anaerobic phosphorus release is carried out when no mixed liquid is cycling and that denitrifying phosphorus removal is carried out when the mixed liquid is cycling; and biological membranes in the non-aeration area carries out back washing regularly and excess sludge is discharged regularly from a mud pipe.
Description
Technical field
The present invention relates to a kind of sewage biochemical processing process and device, belong to the environmental protection industry (epi) technical field of sewage.
Background technology
Biological sewage treatment is economical operation and widely used a kind of method of generally acknowledging.The process for removing nitrogen and phosphor from sewage that grows up according to traditional denitrogenation, dephosphorization principle can be divided into two big classes: a class is multistage (multistage) activated sludge process that spatially anoxic (anaerobism) and aerobic environment branch is arranged, as A
2/ O technology.Another kind of is the sequencing batch activated sludge SBR technology that forms anoxic, aerobic sequence by the control to the aeration oxygen supply in time.Though above technology plays an important role in sewage disposal, but still exist some problems: multistage activated sludge process processing unit is many, floor space is big, need carry out mud backflow and nitrification liquid circulation, the power consumption height; Alternately the intake periodic duty, plant factor of a plurality of single devices of SBR process using is low, and the types of functionality flora can not omnidistance carry out biochemical reaction, total biology efficient is not high.In addition, in synchronous denitrogen dephosphorus technology, polyP bacteria, denitrifying bacteria, nitrifier etc. coexist as in the same Sludge System, and the required redox condition difference of these biological flora breeding existence, requirement difference to sludge age, exist the contention to carbon source between the different biological floras, the mutual inhibition between the biological reaction product all makes denitrogenation, the mutual interference of dephosphorization process phase, finally causes system's denitrogenation, result that the dephosphorization overall efficiency is not high.
Denitrification dephosphorization is meant that the polyP bacteria that a class has a denitrification function can replace dissolved oxygen as electron acceptor(EA) with nitrate, becomes N to nitrate reduction under anoxia condition
2Or the process of nitride and the poly-phosphorus of excess.The characteristics of denitrification dephosphorization technology maximum are to need the process of carbon source to unite two into one denitrification and these two of dephosphorization, avoided the contention of denitrifying bacteria and polyP bacteria to carbon source, and effectively reduce surplus sludge volume, be particularly useful for the domestic sewage treating of low ratio of carbon to ammonium.Reactor according to the denitrification dephosphorization principle design can be divided into single sludge system and two sludge system, in two mud technologies, the denitrification phosphorus-collecting bacterium is independent of in 2 different reactors with the aerobic nitrification bacterium, avoided the mud contradiction in age of polyP bacteria and nitrobacteria in the traditional technology.At present, some denitrifying phosphorus removal technique develop into the engineering application stage from basic research, but be that single mud or two mud technology exist all that flow process is comparatively complicated, internal circulation system is more, shortcomings such as investment and working cost height.
Summary of the invention
The objective of the invention is to, the problem that biological treatment exists at current sewage denitrification and dephosphorization, provide a kind of simple in structure, energy consumption is lower, realize the sewage treatment process and the device of synchronous denitrification dephosphorizing by the intensified anti-nitrated phosphorous-removal process.
Technical scheme of the present invention is achieved in that
A kind of air lift intermittent internal recycle waste disposal plant is divided into two zones by flow deflector with biochemistry pool: aeration zone and non-aeration district; Aerating system is established in aeration zone bottom, in establish filler and membrane module; Non-aeration is established filler in the district, and water inlet pipe is established at the middle part, and back-purge system is established in the bottom; The non-aeration district establishes mud guiding slope in the bottom, and shore pipe is established at the end, slope; Adopt the operation scheme of intermittent water inflow continuous effluent, make the reactor liquid level, realize the periodic transformation of mixed solution in two districts all the time between the high liquid level on flow deflector top and low liquid level, changing in the flow deflector bottom; The aeration zone remains aerobic environment, carries out the aerobic nitrification reaction; The non-aeration district is in anaerobism and anoxic alternate environment, when no mixed solution circulation time carries out anaerobic phosphorus release, has the mixed solution circulation time to carry out denitrifying phosphorus uptake; Non-aeration district microbial film carries out regular back flushing, and excess sludge regularly discharges by shore pipe; Multiple pollutent in the sewage under the alternating action of aerobic microbiological and anoxic (anaerobism) microorganism and the discharging excess sludge efficiently removed.
Described aeration zone is the aerobic nitrification district, adopts the continuous aeration mode, except that membrane module is set, also fixed filler or fluidized packing material can be set.
Described non-aeration district is the denitrification dephosphorization district, and the preferred fixed filler of built-in filler is as soft-filler, semi soft packing, elastic filler, gauze packing etc.
Described flow deflector can be arranged to the training wall form, between flow deflector or training wall upper end and the highest liquid level, all leave certain space between lower end and the mud guiding slope, water distribution structures such as water distributing pore or cloth tank perhaps are set on flow deflector or training wall, to guarantee the uniformly distributing of mixed solution, it is unimpeded to circulate.
The operation scheme of described intermittent water inflow continuous effluent is meant that with the certain flow continuous effluent, by automatic control of liquid level system controlling reactor intake pump intermittent water inflow, and flooding velocity is greater than water flow by membrane module for reactor.When liquid level rises to the highest liquid level, stop into water, restart into water when liquid level is reduced to minimum liquid level, thereby realize that liquid is in the exchange of the cycle in aeration zone and non-aeration district.
The highest described liquid level is relevant with the position of minimum liquid level and flow deflector, and it is apart from the cycle of operation decision by reactor of the height of flow deflector, and the cycle of operation is relevant with influent quality, determines by setting the water-in and water-out flow.
The gradient aspect aeration zone of described mud guiding slope, it is comparatively desirable that domatic and horizontal sextant angle is spent effects greater than 45, is difficult for causing the deposition of mud.
Described back-purge system is located at fixedly filler below, non-aeration district, is air or hydraulic reverse flushing arrangement, and periodic operation is to keep biomembrane activity, and cycle discharging excess sludge is realized the removal of phosphorus.
Compared with prior art, the invention has the beneficial effects as follows:
1, realize the coexistence of different dissolved oxygen environmental demand microorganisms in the monomer device, adopt the film water-out manners to replace the gravity solid-liquid separation, realize removing and sludge settling in the multiple pollutent in the monomer device, floor space is little.
2, utilize aeration power to realize the liquid return process, save the whipping appts of sewage backflow pump and oxygen-starved area, operation energy consumption is low.
3, by unique reactor structure form and operation scheme, to remove when realizing in the sewage carbon, nitrogen, phosphor contaminant by the intensified anti-nitrated phosphorous-removal process, a carbon is dual-purpose, is particularly useful for the domestic sewage treating of low ratio of carbon to ammonium.
4, utilize flow deflector that denitrification phosphorus-collecting bacterium and aerobic nitrification bacterium are independent of in 2 different reaction subregions, avoided the mud contradiction in age of polyP bacteria and nitrobacteria in the traditional technology, guaranteed the effect of denitrogenation and dephosphorization.
Description of drawings
This Fig. 1 is the one-piece construction synoptic diagram of apparatus of the present invention;
Fig. 2 is the operation synoptic diagram of apparatus of the present invention.
Among the figure: 1 aeration zone; 2 non-aeration districts; 3 flow deflectors; 4 fixing fillers; 5 aerating systems; 6 membrane modules; 7 intake pumps; 8 go out water pump; 9 mud guiding slopes; 10 minimum liquid levels; 11 the highest liquid levels; 12 shore pipes; 13 back-purge systems; 14 water inlet robot control system(RCS)s.
Embodiment
As Fig. 1～a kind of air lift intermittent internal circulation denitrification dephosphorization waste disposal plant shown in Figure 2, its main body profile is a rectangular configuration, to be divided into 2 two biochemical reaction zones in aeration zone 1 and non-aeration district by biochemistry pool by flow deflector, the ratio of aeration zone 1 and non-aeration district 2 volumes is about 2: 1.The aeration zone is provided with fixedly filler or Moveable packings 4, one sides are provided with membrane module 6, and membrane module connects water pump 8, and fixedly filler and membrane module bottom are provided with aerating system 5; The non-aeration district is provided with fixedly filler 4, and the filler bottom is provided with back-purge system 13, and water inlet pipe is established at the filler middle part, connects intake pump 7, by 7 water inlets of robot control system(RCS) 14 control intake pumps; 2 bottoms, non-aeration district are provided with mud guiding slope 9, gradient aspect aeration zone, and domatic and horizontal sextant angle is spent greater than 45, and shore pipe is established at the end, slope; Flow deflector or training wall 3 are set between aeration zone and the non-aeration district, all leave certain space between flow deflector lower end and the mud guiding slope, guarantee unimpeded the getting final product of mixed solution circulation.
The method that a kind of air lift intermittent internal circulation denitrification dephosphorization waste disposal plant adopts intermittent water inflow continuous effluent liquid level variable to dispose of sewage, the treating processes that it is characterized in that described reactor comprises the steps, at first, by membrane module 6 continuous effluent, and water inlet is intermittent type, and flooding quantity is greater than aquifer yield, secondly, starts water inlet water pump 7 and by 14 controls of robot control system(RCS)s such as liquid level instrument.When the reactor liquid level arrived minimum liquid level 10, water inlet water pump 7 started, and liquid level stops when being increased to the highest liquid level 11, restarts when liquid level is reduced to minimum liquid level 10, goes round and begins again.Rising to the highest liquid level 11 by minimum liquid level 10 then reduces to the 10 required times of minimum liquid level again and is called a cycle of operation.The cycle of operation, concrete size is by the decision of water-in and water-out flow, and was relevant with influent quality by the height decision apart from flow deflector 3 of minimum liquid level 10 and the highest liquid level 11.The treating processes of a typical cycle of operation of reactor is as follows: Phase I, water inlet pipe 7 beginnings were to 2 water inlets of reactor non-aeration district when the reactor liquid level arrived minimum liquid level 10, the reactor liquid level raises gradually, before being increased to flow deflector 3 upper ends, aeration zone 1 and non-aeration district 2 do not have fluid exchange substantially.This stage aeration district 1 continuous aeration is aerobic zone, and residual ammonia nitrogen of last cycle is attached the oxidation by nitrobacteria of growing and becomes nitrate nitrogen in the sewage on fixing filler; Non-aeration district 2 nitrate concentrations are very low, are anaerobic zone, under anaerobic make full use of carbon source in the water into attached to the denitrification phosphorus-collecting bacterium that grows on the fixing filler, and synthetic PHB carries out phosphorus and discharges; Phase, when the reactor liquid level is higher than flow deflector 3 height, the nitrification liquid of aeration zone 1 is back to non-aeration district 2, reactor stopped into water when liquid level rose to the highest liquid level 11, the nitrate nitrogen that this stage aeration district 1 produces is circulated to non-aeration district 2, non-aeration district 2 is the oxygen-starved area, because water inlet provides carbon source, mainly carries out denitrogenation by conventional denitrification process; Phase I, after the reactor liquid level arrives the highest liquid level 11, stop into water, the reactor liquid level begins to descend, and drops to before flow deflector 3 height, and the mixed solution circulation is still carried out with 2 liang of districts, aeration zone in described aeration zone 1, this, non-aeration district 2 still was the oxygen-starved area in stage, the nitrate nitrogen that aeration zone 1 produces utilizes synthetic PHB in the denitrification phosphorus-collecting thalline after being circulated to non-aeration district 2, is electron donor with the nitrate nitrogen, removes by denitrification dephosphorization; After Phase IV, reactor liquid level were lower than flow deflector 3 height, described two districts stop liquid exchange was reduced to minimum liquid level 10 until liquid level, and this stage aeration district 1 continues aeration and carries out the oxidation of residual carbon source and ammonia nitrogen, but not 2 of aeration zones revert to anaerobic zone; Operational process by above four-stage, organism in the sewage and nitrogen are efficiently removed under the alternating action of aerobic microbiological and anoxic (anaerobism) microorganism, phosphorus in the sewage is absorbed in the body by the denitrification phosphorus-collecting bacterium is excessive, by to the 2 biomembranous regular back flushinges of non-aeration district, discharging excess sludge and removing.
Claims (2)
1. air lift intermittent internal circulation denitrification dephosphorization waste disposal plant, the biochemistry pool that comprises a rectangular configuration, it is characterized in that: this biochemistry pool is divided into (2) two biochemical reaction zones in aeration zone (1) and non-aeration district, the ratio of aeration zone (1) and non-aeration district (2) volume is 2: 1, the aeration zone is provided with fixedly filler or Moveable packings (4), one side is provided with membrane module (6), and membrane module connects water pump (8), and fixedly filler and membrane module bottom are provided with aerating system (5); The non-aeration district also is provided with fixedly filler (4), and the filler bottom is provided with back-purge system (13), and water inlet pipe is established at the filler middle part, connects intake pump (7), by robot control system(RCS) (14) control intake pump (7) water inlet; Bottom, non-aeration district (2) is provided with mud guiding slope (9), gradient aspect aeration zone, and domatic and horizontal sextant angle is spent greater than 45, and shore pipe (12) is established at the end, slope; Flow deflector (3) is set between aeration zone and the non-aeration district, all leaves certain space between flow deflector lower end and the mud guiding slope, guarantee that the mixed solution circulation is unimpeded.
2. a method of disposing of sewage that adopts air lift intermittent internal circulation denitrification dephosphorization waste disposal plant as claimed in claim 1 to carry out intermittent water inflow continuous effluent liquid level variable is characterized in that the treating processes of described biochemistry pool comprises the steps:
When (2.1) the reactor liquid level arrives minimum liquid level (10), water inlet pipe (7) beginning is intake to non-aeration district (2), the reactor liquid level raises thereupon gradually, before being increased to flow deflector (3) upper end, aeration zone (1) and non-aeration district (2) do not have fluid exchange, aeration zone (1) continuous aeration is aerobic zone, and the oxidation by nitrobacteria that residual ammonia nitrogen of last cycle is attached on the fixing filler in the sewage becomes nitrate nitrogen; Non-aeration district (2) nitrate concentration is very low, is anaerobic zone, is attached to denitrification phosphorus-collecting bacterium on the fixing filler and under anaerobic makes full use of carbon source in the water into, and synthetic PHB carries out phosphorus and discharges;
When (2.2) the reactor liquid level is higher than flow deflector (3) height, the nitrification liquid of aeration zone (1) is back to non-aeration district (2), when liquid level rises to the highest liquid level (11), reactor promptly stops into water, the nitrate nitrogen that aeration zone (1) produces is circulated to non-aeration district (2), non-aeration district (2) is the oxygen-starved area, because water inlet provides carbon source, then carries out denitrogenation by conventional denitrification process;
(2.3) after the reactor liquid level arrives the highest liquid level (11), stop into water, the reactor liquid level begins to descend, drop to before flow deflector (3) height, the mixed solution circulation is still carried out with (2) two districts, non-aeration district in aeration zone (1), and non-aeration district (2) still are the oxygen-starved area, and the nitrate nitrogen that aeration zone (1) produces utilizes synthetic PHB in the denitrification phosphorus-collecting thalline after being circulated to non-aeration district (2), with the nitrate nitrogen is electron donor, the dephosphorization by denitrification;
(2.4) after the reactor liquid level was lower than flow deflector (3) height, described two districts stop liquid exchange was reduced to minimum liquid level (10) until liquid level, and aeration zone (1) continues aeration, carries out the oxidation of residual carbon source and ammonia nitrogen, but not aeration zone (2) then revert to anaerobic zone;
(2.5) operational process by above four-stage, organism in the sewage and nitrogen are efficiently removed under the alternating action of aerobic microbiological and anoxic and anaerobion, phosphorus in the sewage is absorbed in the body by the denitrification phosphorus-collecting bacterium is excessive, by to non-aeration district (2) biomembranous regular back flushing, discharging excess sludge and removing.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101817594A (en) * | 2010-04-21 | 2010-09-01 | 于容朴 | Water treatment system and method for sewage/wastewater with unbalanced nutrition |
| CN102101721B (en) * | 2011-01-17 | 2012-07-25 | 江苏中超环保有限公司 | Integrated biological nitrogen removal sewage treatment device |
| DE102011001962A1 (en) * | 2011-04-11 | 2012-10-11 | Thyssenkrupp Uhde Gmbh | Process and plant for biological treatment of coking plant wastewater |
| CN102849895A (en) * | 2012-08-10 | 2013-01-02 | 杭州净洋环保科技有限公司 | Domestic sewage denitrification system and control method thereof |
| CN103449603B (en) * | 2013-07-31 | 2015-05-27 | 杭州师范大学 | Flow direction switching type anaerobic ammonium oxidation baffle plate reactor |
| CN103771585B (en) * | 2014-01-07 | 2015-03-04 | 杭州师范大学 | Two-stage power internal circulation synchronous phosphorus and nitrogen removal granular sludge reactor |
| CN104591497A (en) * | 2015-01-15 | 2015-05-06 | 大连交通大学 | Device and method for strengthening phosphorous removal and purification of sewage in chemical and biochemical reaction processes |
| CN110697997A (en) * | 2019-11-11 | 2020-01-17 | 北控水务(中国)投资有限公司 | Suspension elastic filler reinforced A/O intermittent aeration sewage treatment device and method |
| CN111320274A (en) * | 2020-03-13 | 2020-06-23 | 湖南清之源环保科技有限公司 | Integrated sewage treatment device |
| CN111875058B (en) * | 2020-07-17 | 2021-05-14 | 同济大学 | Double-mud-method biological enhanced sewage treatment device |
| CN114426333B (en) * | 2020-10-29 | 2023-08-01 | 中国石油化工股份有限公司 | Quick starting method for realizing denitrification and dephosphorization of SBR system |
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| US4655928A (en) * | 1983-10-18 | 1987-04-07 | Gnb Incorporated | Membrane processes for metal recovery and pollution control in metal process industries |
Non-Patent Citations (2)
| Title |
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| JP特开2003-1200A 2003.01.07 |
| 张志勇等.气升式环流生物膜反应器硝化反硝化除磷过程的研究.《环境污染与防治》.2006,第28卷(第8期),598-600. * |
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