CN102344199A - NISS (No Inner circumference with Stepfeed System) phosphorus and nitrogen removal automatic control device and process - Google Patents

NISS (No Inner circumference with Stepfeed System) phosphorus and nitrogen removal automatic control device and process Download PDF

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CN102344199A
CN102344199A CN2011102445326A CN201110244532A CN102344199A CN 102344199 A CN102344199 A CN 102344199A CN 2011102445326 A CN2011102445326 A CN 2011102445326A CN 201110244532 A CN201110244532 A CN 201110244532A CN 102344199 A CN102344199 A CN 102344199A
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China
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phosphorus
water
anoxic reacter
reactor
niss
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CN2011102445326A
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Chinese (zh)
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CN102344199B (en
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张志刚
刘洋
牛奕娜
张庭吉
陈曦
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北京华利嘉环境工程技术有限公司
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Abstract

The invention discloses NISS (No Inner circumference with Stepfeed System) phosphorus and nitrogen removal automatic control device and process, belonging to the technical of deep biological phosphorus and nitrogen removal from sewage. A touch screen PLC (Programmable Logic Controller) automatic control cabinet of the device is connected with a water feed pump, an online COD (Chemical Oxygen Demand) analyzer and the like in the NISS phosphorus and nitrogen removal device, the feed water concentration and related parameters in the phosphorus and nitrogen removal system are effectively controller, and unmanned operation is realized in the treatment process. The carbon source in original water is utilized to the maximum extent by feeding water in two steps, so that the biological phosphorus and nitrogen removal of sewage can be realized without adding extra carbon sources, and the cost is reduced. Because online monitoring is adopted, the parameters of water feed quantity and the like can be automatically adjusted, so that the impact and load resistance of the entire system is improved. By automatically adjusting the current of a matched air blower for controlling the concentration of dissolved oxygen, the wastage of electrical energy under the condition of low water feed quantity is avoided, the operating cost of water plants is effectively lowered, and meanwhile, the effects of saving energy and reducing consumption are achieved.

Description

A kind of do not have self-con-tained unit and the technology that internal reflux divides two-stage water NISS denitrogenation dephosphorizing
Technical field
The invention belongs to sewage deep biological carbon and phosphorous removal technical field, the no internal reflux that is specifically related in a kind of sewage that is applicable to the example imbalance of carbon N/P ratio divides two-stage water NISS (No Inner circumfluencewith Stepfeed System) self-con-tained unit and the technology of denitrogenation dephosphorizing.
Background technology
Along with continuing to increase of steady development of economy and population, also in continuous increase, and sewage disposal is for the protection environment to the demand of water resources in China, and the protection water resources prevents that the effect of water pollution is indispensable; Simultaneously, sewage disposal for the productive life environment of keeping ecological balance, protect us, improve us quality of life significant.From the medium-and long-term strategy of China environmental protection development, pollution reduction will be placed to the first place, and the high treatment process of energy consumption will at first lose competitive power, and high resource occupation and high energy consumption technology do not meet the fundamental principle of Sustainable development and low-carbon economy; Undoubtedly, the water technology of energy-saving and cost-reducing type has become developing direction important in the present industry.
Along with the further raising of " 12 " planning to sewage drainage standard, especially with under the background of nitrogen phosphorus as the sewage discharge binding target, it is imperative that nitrogen phosphorus is removed The Study on New Technology.Increased the concentration that total nitrogen, the highest permission of total phosphorus are discharged in " the urban wastewater treatment firm pollutant emission standard " of promulgation in 2002 newly; Meanwhile the ammonia nitrogen to water outlet has also proposed more strict requirement; This shows that the principal contradiction of sewage disposal is converted to the removal to pollutents such as nitrogen phosphorus from the organic removals such as chemical oxygen demand (COD) of Eleventh Five-Year Plan gradually.Occurring in nature, the existence form of nitrogen generally exist with organism, ammonia-state nitrogen, nitrous acid nitrogen, nitrate nitrogen and gaseous nitrogen.Generally only relate to ammonia-state nitrogen, nitrous acid nitrogen and these the three kinds of forms of nitrate nitrogen handled in the sewage disposal.
The ultimate principle of bio-denitrifying sewage is under aerobic condition, earlier ammonia nitrogen to be oxidized to nitrate through nitration reaction, and the anti-nitration reaction through (dissolved oxygen do not exist or concentration very low) under the anoxia condition is reduced into gaseous nitrogen with the nitrate alienation and from water, removes again.
The reaction process of biological denitrificaion is:
1. the principal mode that ammonification and nitrated in undressed fresh wastewater, nitrogenous compound exist has: 1. organonitrogen, like protein, amino acid, urea, aminated compounds, nitro-compound etc.; 2. ammonia-state nitrogen (NH 3, NH 4 +), be main generally with the former.Nitrogenous compound produces following reaction in succession under microbial process: (1) aminating reaction organic nitrogen compound, ammonifying bacteria under the effect, decompose, be converted into ammonia-state nitrogen, this process is referred to as " aminating reaction "; (2) nitration reaction is under the effect of nitrifier, and the further decomposing oxidation of ammonia-state nitrogen divides two stages to carry out at this point; At first under the effect of nitrifier, make ammonia (NH4) be converted into nitrous acid ammonia, continue it; Nitrous acid ammonia further is converted into nitric acid ammonia under the effect of Nitromonas.
2. the anti-nitration reaction anti-nitration reaction is meant nitrate nitrogen (NO 3-N) with nitrous acid nitrogen (NO 2-N) under the effect of denitrifying bacteria, be reduced to gaseous nitrogen (N 2) process.Denitrifying bacteria is the bacterium that belongs to the heterotroph facultative anaerobe.Under anerobe (anoxic) condition, be electron acceptor(EA) with nitrate nitrogen (NO3-N), be electron donor with organism (organic carbon).In denitrification process, nitrate nitrogen has two kinds of path for transformation through the Metabolic activity of denitrifying bacteria; A kind of approach is an assimilation denitrification (synthesizing), finally forms organic nitrogen compound, becomes the integral part of thalline; Another kind of approach is alienation denitrification (decomposition), and final product is a gaseous nitrogen.
In conventional two stage biological treatment system; Phosphorus also becomes the component of biological sludge as the needed element of active sludge microorganism normal growth; Thereby cause the removal of phosphorus; The activated sludge phosphorus content is generally the 1.5%-2.3% of dry weight; In the saprobia dephosphorization process; Blocked operation by anaerobism section and aerobic section; Utilize the excess phosphorus absorbing phenomenon of activated sludge; The quite high bacterial flora physical efficiency of cell phosphorus content is got the mastery in the substrate competition of treatment system; The phosphorus content of excess sludge can reach 3%-7%; The total phosphorus content that gets into excess sludge increases, and the phosphorus concentration of treatment yielding water obviously reduces.
The biological carbon and phosphorous removal process generally all needs anoxic and aerobic hocketing; Traditional A/A/O (anaerobic-anoxic-aerobic) technology of using, improvement A/A/O technology, inversion A/A/O technology, UCT technology and improvement UCT technology are for going out the increasingly serious of water quality standard at present; The effect of denitrogenation dephosphorizing is not very desirable, has almost reached the processing limit of technology.
Summary of the invention
Demand to defective that exists in the prior art and development; The object of the present invention is to provide a kind of self-con-tained unit and technology that internal reflux divides two-stage water NISS denitrogenation dephosphorizing of not having; Realize the efficient dephosphorization performance and build up stable denitrification denitrogenation through this self-con-tained unit, reduce the running cost of water factory simultaneously effectively.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is following:
A kind of do not have internal reflux and divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing; Comprise the automatic control district; Inhalant region in proportion; Biochemical reaction zone and mud district; The automatic control district is the touch screen electrical control cubicles; Inhalant region comprises that the water inlet in proportion that is connected with intake pump cuts apart water tank in proportion; Intake to cut apart in proportion and be provided with online COD analyser and ammonia nitrogen on line analyzer in the water tank; Biochemical reaction zone comprises the first section anoxic reacter that is communicated with in turn; Anaerobic reactor; First section aerobic reactor; Second section anoxic reacter and second section aerobic reactor; First section anoxic reacter; In anaerobic reactor and second section anoxic reacter agitator is installed all; First section aerobic reactor and second section aerobic reactor are equipped with tube aerator and online dissolved oxygen meter; The tubular type exposure unit is communicated with gas blower; The mud district comprises the sludge reflux pump that is communicated with the settling tank bottom; It is characterized in that: water inlet is cut apart water tank and is communicated with the anaerobic reactor and second anoxic reacter through pipeline respectively in proportion; The settling tank bottom is communicated with first section anoxic reacter through sludge reflux pump; Touch screen automatic control cabinet comprises CPU; Touch-screen and warning howler, touch screen automatic control cabinet is respectively through automatic control circuit and intake pump; Agitator; Gas blower; Online COD analyser; Online nh 3-n analyser; Online dissolved oxygen meter is connected with sludge reflux pump.
Further; Aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing; It is that inside is divided into four little orthogonal rectangular reactor that water tank is cut apart in said water inlet in proportion; According to the big and left and right sides parallel bottom connections such as preceding two rectangles of water inlet order; Latter two rectangle up and down parallel bottom is not communicated with, and second rectangle is communicated with the 3rd rectangle and the 4th rectangle through the overflow weir on top.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, and the ratio of the 3rd rectangle and the 4th orthogonal volume is 4: 1.
Further; Aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, and first section anoxic reacter of biochemical reaction zone, anaerobic reactor, first section aerobic reactor, second section anoxic reacter are connected through the dividing plate that is provided with communicating vessels with second section aerobic reactor in turn.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, and said no internal reflux divides the self-con-tained unit of two-stage water denitrogenation dephosphorizing also to comprise the excess sludge discharge control valve that is connected with the settling tank bottom.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, and said intake pump and gas blower are two parallel connections.
Further, aforesaid a kind ofly do not have internal reflux and divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, and touch screen automatic control cabinet is provided with timing register, through two intake pumps of timing register control and gas blower alternate-running.
Divide a kind of no internal reflux of the self-con-tained unit of two-stage water denitrogenation dephosphorizing to divide the two-stage water denitrification dephosphorization technique based on above-mentioned no internal reflux, may further comprise the steps:
(S1) pending sewage is incorporated in proportion water inlet and cuts apart in the water tank, the mud in the settling tank is incorporated in first section anoxic reacter through sludge reflux pump, mix with mixed solution in first section anoxic reacter; In first section anoxic reacter; Oxynitride can be removed by denitrification; The part polyP bacteria absorbs the biodegradable organic that mixes in the sewage of back; Form with internal carbon source PHB is stored in the polyP bacteria body; Discharge the solvability orthophosphoric acid salt simultaneously, reacted mixed solution enters into anaerobic reactor;
(S2) sewage cut apart in the water tank of water inlet enters into anaerobic reactor and second section anoxic reacter in proportion in proportion; In anaerobic reactor; When carrying out organic hydrolysis reaction; Because the anti-nitration reaction of the last period is accomplished, this moment, polyP bacteria can discharge the solvability orthophosphoric acid salt fully;
(S3) reacted mixed solution enters into first section aerobic reactor in anaerobic reactor, and polyP bacteria is accomplished the process of aerobic suction phosphorus in first section aerobic reactor, and meanwhile, the nitrifier in first section aerobic reactor carries out the nitration reaction of ammonia nitrogen;
(S4) reacted mixed solution enters into second section anoxic reacter in first section aerobic reactor, and the amphimicrobe utilization in second section anoxic reacter mixes in the sewage of back organism and carries out anti-nitration reaction and further remove nitrogen;
(S5) reacted mixed solution enters into second section aerobic reactor in second section anoxic reacter, and polyP bacteria is accomplished last aerobic suction phosphorus process and further removed the total phosphorus in the water in second section aerobic reactor;
(S6) in second section aerobic reactor, accomplish reacted mixed solution entering settling tank and carry out mud-water separation, supernatant liquor is discharged, and a part of mud is delivered to first section anoxic reacter through sludge reflux pump, and a part is effluxed by the excess sludge discharge control valve.
Further; Aforesaid a kind of no internal reflux divides the two-stage water denitrification dephosphorization technique; In the step (S2); The detailed process of in anaerobic reactor, removing nitrogen phosphorus is: the heterotrophic denitrification bacterium in the mixed solution utilizes organism to carry out anti-nitration reaction; With the nitrate nitrogen is electron acceptor(EA); With the organism is electron donor; Nitrate nitrogen is through the Metabolic activity of denitrifying bacteria; Form organic nitrogen compound through the assimilation denitrification, become the integral part of thalline, through the alienation denitrification; Produce gaseous nitrogen; Part denitrification phosphorus-collecting bacterium is an electron acceptor(EA) with nitrate simultaneously, is that electron donor is accomplished denitrifying phosphorus uptake with PHB, realizes the synchronous removal of nitrogen phosphorus.
Further, aforesaid a kind of no internal reflux divides the two-stage water denitrification dephosphorization technique, and in the step (S2), sewage is to enter into anaerobic reactor and second section anoxic reacter in 4: 1 ratio.
Beneficial effect of the present invention is following:
1) can utilize the biological respinse pool volume identical to remove nitrogen phosphorus, need not to set up structures, flow into water channel, not change existing utility as far as possible, realize efficiently handling through the dividing plate improvement is set with the existing standard activated sludge process;
2) flow into anaerobic zone A-2 and oxygen-starved area A-3 respectively removing the required carbon source of nitrogen phosphorus; In anoxic pond A-1, remove oxynitride; Prevent the surplus picked-up of residual phosphorus among the aerobic zone 0-2 and the stripping again of the interior phosphorus of settling region S-T; Improved the clearance of nitrogen phosphorus; Compare with traditional denitrification dephosphorization technique, the superiority of the present invention aspect denitrogenation dephosphorizing is able to embody;
3) owing in the total system operational process, do not have internal recycle during denitrogenation, so saved input and maintenance to power-equipment, it is more convenient that each unit is safeguarded.The running management method of the present invention and standard activity mud technology differs very little, and does not have internal reflux, and sludge yield is low, therefore is convenient to management more;
4) the employing segmentation flows into and does not have internal reflux, has greatly improved the HRT (HydraulicRetention Time, hydraulic detention time) of reaction tank,, saved the pond appearance, also saved the electricity charge, realized more economic processing, improved processing efficiency;
5) because system does not have mixed solution internal reflux facility; The mud external reflux only is set to the biological tank source; Sludge concentration is the ladder form from high to low in the biological tank; Biological total amount is improved in the biological tank; Make polyP bacteria, nitrifier and denitrifying bacteria be in competitive edge, strengthened the dephosphorization and denitrification effect of total system greatly.
The present invention can be widely used in the processing of big-and-middle cities and towns municipal wastewater or the unbalanced industrial sewage of carbon N/P ratio example, is specially adapted to the transformation of existing A/A/O technology or its modification technology water factory.
Description of drawings
Fig. 1 is the synoptic diagram of the Q of Mitsubishi series touch screen Controlling System in the embodiment;
Fig. 2 does not have the structural representation that internal reflux divides the self-con-tained unit of two-stage water denitrogenation dephosphorizing for the present invention is a kind of.
Embodiment
Below in conjunction with Figure of description and embodiment the present invention is done further detailed description.
At first the structure title to each the Reference numeral representative in the accompanying drawing 2 describes:
Among Fig. 1: A-automatic control district; B-is inhalant region in proportion; The C-biochemical reaction zone; D-mud district;
The 1-intake pump; 2-sewage is intake in proportion and is cut apart water tank; First section anoxic reacter of 3-; The 4-anaerobic reactor; First section aerobic reactor of 5-; Second section anoxic reacter of 6-; Second section aerobic reactor of 7-; The 8-settling tank; The 9-agitator; 10-gas blower (air compressor); The 11-tube aerator; The online COD analyser of 12-; The online nh 3-n analyser of 13-; The 14-sludge reflux pump; 15-excess sludge discharge control valve; The online dissolved oxygen meter of 16-; 17-touch screen automatic control cabinet.
Fig. 2 shows that the present invention is a kind of not to have a structural representation that internal reflux divides the self-con-tained unit of two-stage water NISS denitrogenation dephosphorizing, this device automatic control district A, inhalant region B, biochemical reaction zone C and mud district D in proportion; Automatic control district A is a touch screen automatic control cabinet 17; Inhalant region B comprises that the sewage that is connected with intake pump 1 is intake in proportion and cuts apart water tank 2 sewage and intake in proportion to cut apart and be provided with online COD analyser 12 and ammonia nitrogen on line analyzer 13 in the water tank 2 in proportion; Biochemical reaction zone C comprises the first section anoxic reacter 3 that connects in turn; Anaerobic reactor 4; First section aerobic reactor 5; Second section anoxic reacter 6 and second section aerobic reactor 7; First section anoxic reacter 3; All be equipped with in anaerobic reactor 4 and the second section anoxic reacter 6 and have step-down gear agitator 9; First section aerobic reactor 5 and second section aerobic reactor 7 are equipped with tube aerator 11 and online dissolved oxygen meter 16; Tubular type exposure unit 11 is communicated with gas blower 10, and mud district D comprises the sludge reflux pump 14 that is communicated with the settling tank bottom.
Water inlet is cut apart water tank 2 and is communicated with the anaerobic reactor 4 and second anoxic reacter 6 through pipeline respectively in proportion; Realize segmental influent; The settling tank bottom is communicated with first section anoxic reacter 3 through sludge reflux pump 14, and touch screen automatic control cabinet 17 is connected with sludge reflux pump 14 with intake pump 1, agitator 9, gas blower 10, online COD analyser 12, online nh 3-n analyser 13, online dissolved oxygen meter 16 through the automatic control circuit respectively.
It is 5 reactors that first section anoxic reacter 3, anaerobic reactor 4, first section aerobic reactor 5, second section anoxic reacter 6 and second section aerobic reactor 7 are divided into said each reactor through the dividing plate that is provided with communicating vessels; In order to prevent the air-teturning mixed phenomenon of mixed solution, also be provided with overflow port on the dividing plate; Settling tank 8 bottoms are communicated with first section anoxic reacter 3 through sludge reflux pump 14; Also be provided with online dissolved oxygen meter 16 in first section aerobic reactor 5 and second section aerobic reactor 7; Dissolved oxygen concentration in two reactors is by online dissolved oxygen meter 16 Online Monitoring Control, as the controlled variable of regulating each section tube aerator 11 aeration valves.In addition; The bottom of settling tank 8 also is connected with excess sludge discharge control valve 15; Mixed solution in second section aerobic reactor 7 gets into settling tank 8 when carrying out mud-water separation; Supernatant liquor is discharged along overflow weir; Sludge settling is at sludge bucket; A part is promoted to first anoxic reacter 3 through sludge reflux pump 14, and another part precipitating sludge is discharged through mud discharging control valve 15 as excess sludge.
Touch screen automatic control cabinet 17 of the present invention is that Controlling System adopts the control of the high-performance Q of Mitsubishi series of PLC; The GT15 touch screen operation; As shown in Figure 1; This automatic control cabinet is mainly by being by master (model HxWxD); CPU (model Q02CPU); Main substrate (model Q38B); Load module (model 12/24VDC16 point); The band short-circuit protection, touch-screen (model GT1585STBA), elements such as programming cable (model QC30R2) and warning howler are formed; Its role is to control the normal operation that no internal reflux divides the self-con-tained unit of two-stage water denitrogenation dephosphorizing; According to feed-forward signal (comprising water quality, the water yield etc.), and back feedback signal (DO etc.) is adjusted the operating parameter of system accurately.Controlling System is placed in the electric control box, is used for concentrating keeping watch on, controlling and show.In addition, be convenient management, system can also carry out uninterrupted recording and storage to all operation conditions, parameter.After guaranteeing under the unimpeded situation of pipeline, having debugged system, complete assembly can be realized unattended.When the water inlet Pollutant levels surpass the regulation range of intake pump; On-line monitoring device is through sending data to PLC; Automatic control cabinet PLC can give the alarm automatically; After operator cancel alarm; Regulate the size of flooding quantity; The ratio of external reflux and the electric current of gas blower guarantee under the state of less energy-consumption with the concentration of control dissolved oxygen, carry out and set out water quality standard.
In addition; Intake pump 1 in apparatus of the present invention all is to compose in parallel by two with gas blower 10; For water inlet and the dissolved oxygen amount that makes system remains on a constant scope, touch screen automatic control cabinet 17 also is provided with timing register and controls two intake pumps and gas blower alternate-running on time.
In addition, apparatus of the present invention are also very flexible on operation scheme, in the area of heavy rainfull, in arriving rainy season, increase rapidly in the flooding quantity short period of time, and the ratio that can regulate water inlet is artificially disperseed the impact to total system, make system's withstand shock more.
The present invention also provides a kind of and has divided the no internal reflux of the self-con-tained unit of two-stage water NISS denitrogenation dephosphorizing to divide the two-stage water denitrification dephosphorization technique based on above-mentioned no internal reflux, and this technology may further comprise the steps:
Step 1: sewage is incorporated into water inlet in proportion cuts apart in the water tank; Mud in the settling tank is incorporated in first section anoxic reacter through sludge reflux pump; Mix with the mixed solution in first section anoxic reacter; PolyP bacteria absorbs the biodegradable organic that mixes in the sewage of back in first section anoxic reacter; Form with internal carbon source PHB is stored in the polyP bacteria body; Discharge the solvability orthophosphoric acid salt simultaneously, reacted mixed solution enters into anaerobic reactor;
Step 2: the sewage of cutting apart in the water tank of intaking in proportion enters into anaerobic reactor and second section anoxic reacter in proportion, and the heterotrophic denitrification bacterium carries out anti-nitration reaction removal most of the nitrogen in anaerobic reactor, carries out denitrifying phosphorus uptake simultaneously and removes part phosphorus;
Step 3: reacted mixed solution enters into first section aerobic reactor in anaerobic reactor, and the polyP bacteria in first section aerobic reactor is accomplished the process of aerobic suction phosphorus, removes phosphorus;
Step 4: reacted mixed solution enters into second section anoxic reacter in first section aerobic reactor; Put into amphimicrobe utilization mixing back sewage organism in second section anoxic reacter and carry out the further denitrification of anti-nitration reaction, simultaneously the Absorption of Phosphorus hydrochlorate;
Step 5: reacted mixed solution enters into second section aerobic reactor in second section anoxic reacter, and polyP bacteria is accomplished the further de-scaling of aerobic suction phosphorus process in second section aerobic reactor;
Step 6: in second section reactor, accomplish reacted mixed solution entering settling tank and carry out mud-water separation, supernatant liquor is discharged, and a part of mud is delivered to first section anoxic reacter through sludge reflux pump, and a part is effluxed by the excess sludge discharge control valve.
For a better understanding of the present invention, specifically describe in detail in the face of the concrete reaction process in each reactor in above-mentioned each step down.
First section anoxic reacter 3: sludge reflux pump 14 gets into first section anoxic reacter 3 from the mud that settling tank 9 extracts; Mix with mixed solution in first section anoxic reacter (active sludge intermixture that originally has in first section anoxic reacter); In first section anoxic reacter 3, accomplish polyP bacteria under the stirring action of agitator 10 and absorb the biodegradable organic in the sewage; Form with internal carbon source PHB is stored in the polyP bacteria body, discharges a large amount of solvability orthophosphoric acid salt simultaneously.PolyP bacteria through excess sludge discharge, is removed phosphorus after inhaling phosphorus through good oxygen excess from system.The precondition of aerobic Absorption of Phosphorus is the anaerobism release that mixed solution must pass through phosphorus, and in effective dispose procedure, the anaerobism of phosphorus discharges the aerobic suction phosphorus ability of microorganism is improved greatly.Not being both of aerobic suction phosphorus speed put by anaerobism that phosphorus speed difference causes.The anaerobism section puts that phosphorus speed is big, and the phosphorus burst size is big, and synthetic PHB is just many, so when aerobic section since decomposed P HB and synthetic to gather hydrochlorate speed just bigger, so the aerobic suction phosphorus speed that shows is also just big; Phosphorus absorb phosphorus is discharged also influential, phosphorus absorb accomplish more thoroughly, to gather the phosphorus amount big more, effective release of phosphorus is also guaranteed more under the corresponding anaerobic state.Through the phosphorus of putting of two anaerobious sections, ensuing aerobic section is inhaled phosphorus provides very favorable condition.
Anaerobic reactor 4: the heterotrophic denitrification bacterium utilizes residual organic substances to carry out anti-nitration reaction under the stirring action of anaerobic reactor agitator 9, and denitrifying bacteria is the bacterium that belongs to the heterotroph facultative anaerobe.Under anaerobic, with nitrate nitrogen (NO 3-N) be electron acceptor(EA), be electron donor with organism (organic carbon).In denitrification process, nitrate nitrogen has two kinds of path for transformation through the Metabolic activity of denitrifying bacteria; A kind of approach is an assimilation denitrification (synthesizing), finally forms organic nitrogen compound, becomes the integral part of thalline; Another kind of approach is alienation denitrification (decomposition), and final product is a gaseous nitrogen.In this simultaneously part denitrification phosphorus-collecting bacterium be electron acceptor(EA) with nitrate, storing intravital PHB with anaerobic reactor is that electron donor is accomplished denitrifying phosphorus uptake, realizes the synchronous removal of nitrogen phosphorus.
First section aerobic reactor 5: anaerobic reactor 4 goes out water mixed liquid and directly gets into first section aerobic reactor 5, by the gas blower in the aerating system 10 aeration is provided, the remaining few organism of heterotrophic bacterium oxidation, and nitrifier is with NH 4 +-N is converted into NO x -N, polyP bacteria comprise that the denitrification phosphorus-collecting bacterium accomplishes aerobic suction phosphorus process.The size of aeration rate is adjusted according to running status Inlet and outlet water situation utilization spinner-type flowmeter, controls first section aerobic reactor water outlet NH 4 +-N is at 0~3mg/L, if water outlet NH 4 +-N exceeds this scope, will adjust aeration rate, guarantees nitrification effect.
Second section anoxic reacter 6: part of contaminated water and second section anoxic reacter 6 of first section aerobic reactor 5 nitrification liquids entering have denitrification and dephosphorization function concurrently under the stirring action of agitator 9 amphimicrobe utilizes entering organic matter of water to carry out anti-nitration reaction, follows phosphatic absorption simultaneously.
Second section aerobic reactor 7: function is identical with first section aerobic reactor 3.Second section anoxic reacter 6 goes out water mixed liquid and directly gets into second section aerobic reactor 7; By the gas blower in the aerating system 10 aeration is provided; Accomplish microorganism and support absorption, and nitration reaction is to the aerobic absorption of the nitrated and phosphorus of the removal of ammonia nitrogen and ammonia nitrogen remaining the good of a small amount of organism and phosphorus.
8: the second sections aerobic reactor 7 mixed solutions of settling tank get into settling tank 8 and carry out mud-water separation; Supernatant liquor is discharged along overflow weir; Sludge settling is at sludge bucket; A part is promoted to first section anoxic reacter 3 through sludge reflux pump 14, and another part precipitating sludge is discharged through mud discharging control valve 15 as excess sludge.
In order to realize accurately dividing in proportion the experimental condition of two-stage water; Selected experimental rig reactor sewage is intake in proportion in this specific embodiment, and to cut apart water tank 2 are rectangular reactor that an inside is divided into four little rectangles; By the water inlet order; Preceding two rectangles in the water tank such as are at parallel bottom, big left and right sides UNICOMs; Sewage gets into water tank from first rectangle top; Flow into second rectangle from the bottom; Then by in the 3rd and the 4th rectangle of the zigzag downflow weir in top inflow uniformly; The 3rd is the disconnected reactor in parallel bottom up and down with the 4th rectangle; Size is strict ratio in 4: 1; Promptly in inflow 0.8Q: the design of 0.2Q ratio; Dischargeable capacity is 370L; Volume ratio by with the 3rd and the 4th rectangle designed in strict accordance with 4: 1; Segmentation to realize anaerobic reactor 4 and second section anoxic reacter 7 intake in proportion (be anaerobic reactor 4 be communicated with, second section anoxic reacter 7 is communicated with the 4th rectangle) with sewage the 3rd rectangle cutting apart water tank of intaking in proportion.This device is divided into 5 reactor operations: first reactor is first section anoxic reacter 3 (260L); Second reactor is anaerobic reactor 4 (640L); And then three reactors are first section aerobic reactor 5 (1920L), are that second section anoxic reacter 6 (1600L), second section aerobic reactor 7 (640L), settling tank 8 useful volumes are 2000L then successively.In first section anoxic reacter 3, anaerobic reactor 4, second section anoxic reacter 6, agitator 10 is installed all, is in complete admixture to keep internal system mud; Wherein first section aerobic reactor 5, second section aerobic reactor 7 bottom are equipped with tube aerator 11, and each section detested, anoxic reacter is connected with aerobic reactor at interval in turn; Settling tank 8 bottoms are communicated with first section anoxic reacter 3 through sludge reflux pump 14, and excess sludge is done harmless treatment through excess sludge discharge control valve 15 discharge systems; The dissolved oxygen concentration of first section aerobic reactor 5, second section aerobic reactor 7 is by online dissolved oxygen meter 16 Online Monitoring Control, as the controlled variable of regulating each section tube aerator 11 aeration valves.Wherein air feeder arrives pressurized air in first section aerobic reactor 5 and second section aerobic reactor 7 through supply air line, bloats micro bubble through tube aerator 11 and satisfies microorganism growth; Water inlet, mud external reflux promote metering through intake pump 1, sludge reflux pump 14 respectively, and each reactor separates through dividing plate, and dividing plate is provided with overflow port to prevent the air-teturning mixed phenomenon of mixed solution.
Under the situation that the water inlet Pollutant levels raise suddenly, reduce flooding quantity automatically through housing 17, reducing into as much as possible, the water pollutent raises suddenly to the impact of system; Under the situation that the water inlet Pollutant levels reduce suddenly, increase flooding quantity automatically, with this sludge concentration and other operating parameter of keeping system, allow system's smooth running.
Because the water inlet of system and relevant operating parameter obtain having effective control that PLC touches the automatic control cabinet 17 of robot control system(RCS), therefore can in the process of sewage disposal, realize unattended.For through engineering approaches of the present invention in the future provides the reliable technique parameter.
Of the present invention is how to realize the biological high-efficiency phosphorus removal property and how to build up stable denitrification efficient denitrification in order to solve; The reasonable distribution water-inlet carbon source is to reduce the problems such as operating cost that additional carbon was increased simultaneously; Propose a kind of interior backflow of nothing of handling town domestic sewage and industrial wastewater and divide the self-con-tained unit of two-stage water denitrogenation dephosphorizing; Can accomplish the carbon source of efficiently utilizing in the sewage branch two-stage water strategy, be the UCT technology two big technical tie-ups with synchronous denitrification dephosphorizing of refluxing in default; In real time the influent concentration of system is carried out effective monitoring with relevant operational factor by robot control system(RCS) simultaneously, become timely control adjustment.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technology thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims (10)

1. one kind is not had internal reflux and divides two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing; Comprise automatic control district (A); Inhalant region (B) in proportion; Biochemical reaction zone (C) and mud district (D); The automatic control district is touch screen electrical control cubicles (17); Inhalant region comprises that the water inlet in proportion that is connected with intake pump (1) cuts apart water tank (2) in proportion; Intake to cut apart in proportion and be provided with online COD analyser (12) and online nh 3-n analyser (13) in the water tank (2); Biochemical reaction zone comprises the first section anoxic reacter (3) that is communicated with in turn; Anaerobic reactor (4); First section aerobic reactor (5); Second section anoxic reacter (6) and second section aerobic reactor (7); First section anoxic reacter (3); In anaerobic reactor (4) and the second section anoxic reacter (6) agitator (9) is installed all; Be equipped with tube aerator (11) and online dissolved oxygen meter (16) in first section aerobic reactor (5) and the second section aerobic reactor (7); Tubular type exposure unit (11) is communicated with gas blower (10); The mud district comprises the sludge reflux pump (14) that is communicated with settling tank (8) bottom; It is characterized in that: water inlet is cut apart water tank (2) and is communicated with anaerobic reactor (4) and second section anoxic reacter (6) through pipeline respectively in proportion; Settling tank (8) bottom is communicated with first section anoxic reacter (3) through sludge reflux pump (14); Touch screen automatic control cabinet (17) comprises CPU; Touch-screen and warning howler, touch screen automatic control cabinet (17) are respectively through automatic control circuit and intake pump (1); Agitator (9); Gas blower (10); Online COD analyser (12); Online nh 3-n analyser (13); Online dissolved oxygen meter (16) is connected with sludge reflux pump (14).
2. no internal reflux as claimed in claim 1 divides two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing; It is characterized in that: said water inlet is in proportion cut apart water tank (2) and is divided into four little orthogonal rectangular reactor for inside; According to the big and left and right sides parallel bottom connections such as preceding two rectangles of water inlet order; Latter two rectangle up and down parallel bottom is not communicated with, and second rectangle is communicated with the 3rd rectangle and the 4th rectangle through the overflow weir on top.
3. no internal reflux as claimed in claim 2 divides two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, it is characterized in that: the ratio of the 3rd rectangle and the 4th orthogonal volume is 4: 1.
4. no internal reflux as claimed in claim 1 divides two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, it is characterized in that: first section anoxic reacter (3) of biochemical reaction zone, anaerobic reactor (4), first section aerobic reactor (5), second section anoxic reacter (6) and second section aerobic reactor (7) are connected through the dividing plate that is provided with communicating vessels in turn.
5. no internal reflux as claimed in claim 1 divides two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, it is characterized in that: said no internal reflux divides the self-con-tained unit of two-stage water denitrogenation dephosphorizing also to comprise the excess sludge discharge control valve (15) that is connected with the settling tank bottom.
6. no internal reflux as claimed in claim 1 divides two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing, it is characterized in that: said intake pump (1) and gas blower (10) are two parallel connections.
7. divide two-stage water NISS the self-con-tained unit of denitrogenation dephosphorizing like claim 1 or 6 described no internal reflux, it is characterized in that: touch screen automatic control cabinet (17) is provided with timing register, through two intake pumps of timing register control and gas blower alternate-running.
8. a no internal reflux divides two-stage water NISS denitrification dephosphorization technique, may further comprise the steps:
(S1) pending sewage is incorporated in proportion water inlet and cuts apart in the water tank, the mud in the settling tank is incorporated in first section anoxic reacter through sludge reflux pump, mix with mixed solution in first section anoxic reacter; PolyP bacteria absorb to mix the biodegradable organic in the sewage of back in first section anoxic reacter, is stored in the polyP bacteria body with the form of internal carbon source PHB, discharges the solvability orthophosphoric acid salt simultaneously, and reacted mixed solution enters into anaerobic reactor;
(S2) sewage cut apart in the water tank of water inlet enters into anaerobic reactor and second section anoxic reacter in proportion in proportion, and the heterotrophic denitrification bacterium carries out anti-nitration reaction and removes most of the nitrogen in anaerobic reactor, carries out denitrifying phosphorus uptake simultaneously and removes part phosphorus;
(S3) reacted mixed solution enters into first section aerobic reactor in anaerobic reactor, and polyP bacteria is accomplished the process of aerobic suction phosphorus in first section aerobic reactor, removes phosphorus;
(S4) reacted mixed solution enters into second section anoxic reacter in first section aerobic reactor; Amphimicrobe utilization in second section anoxic reacter mixes in the sewage of back organism to be carried out anti-nitration reaction and further removes nitrogen, simultaneously the Absorption of Phosphorus hydrochlorate;
(S5) reacted mixed solution enters into second section aerobic reactor in second section anoxic reacter, and polyP bacteria is accomplished the further de-scaling of aerobic suction phosphorus process in second section aerobic reactor;
(S6) in second section aerobic reactor, accomplish reacted mixed solution entering settling tank and carry out mud-water separation, supernatant liquor is discharged, and a part of mud is delivered to first section anoxic reacter through sludge reflux pump, and a part is effluxed by the excess sludge discharge control valve.
9. a kind of no internal reflux as claimed in claim 8 divides two-stage water NISS denitrification dephosphorization technique; It is characterized in that: in the step (S2); The detailed process of in anaerobic reactor, removing nitrogen phosphorus is: the heterotrophic denitrification bacterium in the mixed solution utilizes organism to carry out anti-nitration reaction; With the nitrate nitrogen is electron acceptor(EA); With the organism is electron donor; Nitrate nitrogen is through the Metabolic activity of denitrifying bacteria; Form organic nitrogen compound through the assimilation denitrification; Become the integral part of thalline; Through the alienation denitrification, produce gaseous nitrogen, part denitrification phosphorus-collecting bacterium is electron acceptor(EA) with nitrate simultaneously; With PHB is that electron donor is accomplished denitrifying phosphorus uptake, realizes the synchronous removal of nitrogen phosphorus.
10. a kind of no internal reflux as claimed in claim 8 divides two-stage water NISS denitrification dephosphorization technique, it is characterized in that: in the step (S2), sewage is to enter into anaerobic reactor and second section anoxic reacter in 4: 1 ratio.
CN 201110244532 2011-08-24 2011-08-24 NISS (No Inner circumference with Stepfeed System) phosphorus and nitrogen removal automatic control device and process CN102344199B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2481707Y (en) * 2001-06-18 2002-03-13 大庆市北盛有限公司 Process for high-efficiency treating sewage by denitrogenation and dephosphorization
CN1382647A (en) * 2002-05-10 2002-12-04 清华大学 Equipment for denitrifying and dephosphating sewage in integrated aerobic/anaerobic biologic fiter pool
CN1609016A (en) * 2004-11-19 2005-04-27 宋乾武 Nitrogen and phosphorus removing process
CN1803671A (en) * 2006-01-24 2006-07-19 北京工业大学 Optimized control method of anaerobic-anoxic-aerobic process denitrifying phosphorus removal
CN202246252U (en) * 2011-08-24 2012-05-30 北京华利嘉环境工程技术有限公司 No inner circumfluence with stepfeed system (NISS) denitrification dephosphorization self-control device without inner circumfluence and capable of enabling water to enter in two sections

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2481707Y (en) * 2001-06-18 2002-03-13 大庆市北盛有限公司 Process for high-efficiency treating sewage by denitrogenation and dephosphorization
CN1382647A (en) * 2002-05-10 2002-12-04 清华大学 Equipment for denitrifying and dephosphating sewage in integrated aerobic/anaerobic biologic fiter pool
CN1609016A (en) * 2004-11-19 2005-04-27 宋乾武 Nitrogen and phosphorus removing process
CN1803671A (en) * 2006-01-24 2006-07-19 北京工业大学 Optimized control method of anaerobic-anoxic-aerobic process denitrifying phosphorus removal
CN202246252U (en) * 2011-08-24 2012-05-30 北京华利嘉环境工程技术有限公司 No inner circumfluence with stepfeed system (NISS) denitrification dephosphorization self-control device without inner circumfluence and capable of enabling water to enter in two sections

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