CN103739066A - Autotrophic denitrification synchronous sludge fermentation coupled denitrification device and method for sewage with low nitrogen ratio - Google Patents
Autotrophic denitrification synchronous sludge fermentation coupled denitrification device and method for sewage with low nitrogen ratio Download PDFInfo
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Abstract
The invention relates to an autotrophic denitrification synchronous sludge fermentation coupled denitrification device and method for sewage with low nitrogen ratio. A raw water tank, a sludge storage pool and a sedimentation pool are connected with an autotrophic denitrification synchronous sludge fermentation coupled denitrification reactor; the autotrophic denitrification synchronous sludge fermentation coupled denitrification reactor is provided with a self-circulation pipeline. The method comprises the following steps: enabling raw material, shortcut nitrification reflux liquid and fresh remaining sludge to enter the autotrophic denitrification synchronous sludge fermentation coupled denitrification reactor together, enabling part of ammonia nitrogen and nitrite to perform autotrophic denitrification through anaerobic ammonium oxidation bacteria, enabling the remaining nitrite and nitrate nitrogen to utilize organic matters in the raw water and a carbon source produced by fermentation of the remaining sludge to perform denitrification, nitrifying outlet water in a shortcut nitrification reactor, performing sludge-water separation by the sedimentation pool, and then enabling part of nitrification liquid to reflux into the autotrophic denitrification synchronous sludge fermentation coupled denitrification reactor. According to the device and the method, provided by the invention, the high ammonia nitrogen load impact can be effectively resisted, the raw water and the carbon source produced by fermentation are fully utilized, the denitrification efficiency of waste water is improved, and the production of sludge can be simultaneously reduced.
Description
Technical field
The present invention relates to high ammonia-nitrogen wastewater and excess sludge biochemical processing field, the ammonia nitrogen that sludge fermentation discharges reacts the nitrous producing and removes by Anammox with short distance nitration, denitrifying bacteria utilizes the VFA that acidication produces as electron donor, the nitric nitrogen denitrification producing to be removed, and reaches the degree of depth removal of total nitrogen and effective utilization of mud.
Background technology
Low carbon-nitrogen ratio sewage is as sludge of sewage treatment plant nitrification liquid, percolate etc., and this class waste water exists the problem of carbon source wretched insufficiency, and the carbon source of himself cannot meet the demand of denitrogenation at all, thereby becomes biological sewage treatment total nitrogen key reason not up to standard.For addressing this problem, improve nitrogen removal rate, it is effective means that the extra intensified anti-nitrated effect of carbon source is provided.In additional carbon, mainly comprise two kinds:
1) single carbon source.Main carbon source kind has methyl alcohol, acetic acid, ethanol etc.In actual sewage treatment plant, methyl alcohol is comparatively extensive as traditional denitrification additional carbon application.The advantage of single additional carbon is can reach higher denitrification rate through taming generally, can accurately control added amount of chemical, and operational management is convenient, stable effluent quality.But for to reach suitable denitrification rate and good denitrification effect, need doubly add carbon source according to the 2-3 of theoretical consumption, working cost is expensive.
2) compounded carbons.Voltaile fatty acid is a kind of effective compounded carbons, refers to that carbon atom is the lipid acid of 2-6, take acetic acid, propionic acid, butyric acid as main in municipal effluent/mud.Voltaile fatty acid can obtain by anaerobic sludge digestion, therefore utilizes the lipid acid that sludge hydrolysis, acidification produces can alleviate the not enough problem of denitrifying carbon source as the carbon source of Sewage Plant biological carbon and phosphorous removal, realizes sludge reduction simultaneously.Yet microorganism will make part ammonia nitrogen be discharged in supernatant liquor by deamination in sludge hydrolysis, acidification process, cause in sludge hydrolysis, acidification supernatant liquor ammonia nitrogen concentration too high, reduced the practical application of the method.
At present, there is a kind of novel process----anaerobic ammonia oxidation process in biological denitrificaion.According to Anammox reaction, anaerobic ammonia oxidizing bacteria can be converted into nitrogen by ammonia nitrogen and nitrite nitrogen.Because anaerobic ammonia oxidizing bacteria belongs to anaerobism autotrophic bacteria, reaction process is without oxygen and organism, thus can save aeration and organic carbon source, thus greatly reduce processing costs and the capital cost of sewage disposal.Yet by Anammox reaction relation, for how guaranteeing that stable and lasting ammonia nitrogen and the proportionlity of nitrite nitrogen also lack effective control, and in reaction process, also can follow part nitric nitrogen to produce.
Summary of the invention
Object of the present invention is exactly in order to address the above problem, autotrophic denitrification synchronous sludge fermentation coupling denitrification device and method have been proposed, the nitrification liquid that is about to short distance nitration mixes with excess sludge, the ammonia nitrogen first sludge fermentation being discharged by Anammox effect and the part nitrite nitrogen in nitrification liquid are removed, the voltaile fatty acid that the fermentation of denitrifying bacteria recycling produces is carbon source, by remaining nitrous and nitre nitrogen Restore All, reach the efficient removal of waste water total nitrogen.
The present invention is achieved through the following technical solutions:
A low carbon-nitrogen ratio sewage autotrophic denitrification synchronous sludge fermentation coupling denitrification device, is provided with raw water box 1, storage basin 2, autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3, short distance nitration reactor 4, blowoff basin 5; Raw water box 1 is connected with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 bottoms by intake pump 1.1, and autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 is connected with the first lattice of short distance nitration reactor 4 chamber by going out water pump 3.11; Be crisscross arranged the up and down dividing plate of water hole of short distance nitration reactor 4 use is divided into 4-9 lattice chamber, each lattice chamber is provided with aerating apparatus 4.1, short distance nitration reactor 4 ends are connected with settling tank 4.2, settling tank 4.2 bottoms are connected with the first lattice of short distance nitration reactor 4 chamber by sludge reflux pump 4.4, and settling tank 4.2 water outlets are connected with blowoff basin 5; Blowoff basin 5 is provided with water shoot 5.1, by nitrification liquid reflux pump 5.2, is connected with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 bottoms.
Autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 is provided with cylindrical sludge bed 3.7, and top is provided with top sealing plate 3.6 and triphase separator 3.9, and centre is provided with temperature control heating belting 3.10, and bottom is provided with water-distributing device 3.8; The top of triphase separator 3.9 is communicated with gas collector 3.5; Cylindrical sludge bed 3.7 top water outlets are connected with cylindrical sludge bed 3.7 bottoms by intermediate water tank 3.1, recycle pump 3.2 and circulation control valve 3.3 successively; Storage basin 2 is by entering dredge pump 2.1 and entering mud control valve 2.2 and autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 bottoms and be connected, and blowoff basin 5 is connected by nitrification liquid reflux pump 5.2 and autotrophic denitrification synchronous sludge coupling denitrification reactor 3 bottoms of fermenting.
The method that autotrophic denitrification synchronous sludge fermentation coupling denitrification device carries out low carbon-nitrogen ratio sewage processing, comprises the following steps:
Step 1: start short distance nitration reactor 4: the nitrifying sludge of actual cities sanitary sewage disposal factory of take is that seed sludge injects short distance nitration reactor 4, and control sludge concentration is 2000-5000mg/L, hydraulic detention time 4-8h, sludge retention time 20-30 days; Actual cities sanitary sewage is pumped into the head end of short distance nitration reactor 4, start subsequently aerating apparatus 4.1 and carry out nitrification, regulate aerating apparatus 4.1 to make dissolved oxygen in nitrifying process maintain 2mg/L, with the sodium hydroxide of 2mol/L, regulate pH value to make it maintain 8.0-8.5, water outlet enters settling tank 4.2, precipitating sludge is back to the first lattice chamber of short distance nitration reactor 4, and control of reflux ratio is at 50%-100%.Move under these conditions short distance nitration reactor 4, when water outlet nitrite accumulation rate is greater than 90% and while continuing to maintain more than 15 days, the success of short distance nitration reactor start-up;
Step 2: start autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3: control sludge concentration 7000-8000mg/L in autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3, hydraulic detention time 3-5h, sludge retention time 10-20 days, water inlet adopts NH
4 +-N and NO
2 --N mass ratio is the artificial distribution of 1:1.3, initial TN concentration is 20mg/L and progressively increases nitrogen load until 200mg/L with the gradient of 20mg/L, each time that increases nitrogen load surpasses 95% and continue to maintain above judgement in 15 days with autotrophic denitrification rate, finally completes the Anammox acclimation to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3; Water inlet adopts NH
4 +-N and NO
2 --N mass ratio is the artificial distribution that 1:1.3 and TN are 200mg/L, add sodium acetate as denitrifying carbon source, to make SCOD concentration be 100-150mg/L simultaneously, when TN clearance is higher than 90% and while continuing to maintain more than 15 days, Anammox and denitrifying coupling successfully realize; The excess sludge substituted acetic acid sodium of usining makes SCOD concentration continue to maintain 100-150mg/L as denitrifying carbon source, when TN clearance is higher than 90% and while continuing to maintain more than 15 days, reaches the realization of autotrophic denitrification synchronous sludge fermentation coupling denitrification.
Step 3: short distance nitration reactor 4 completes respectively after startup with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3, by whole device series operation: open into dredge pump 2.1, the fresh excess sludge in storage basin is injected to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3; Open intake pump 1.1 former water is injected to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3, control wherein sludge concentration 7000-8000mg/L, hydraulic detention time 3-5h, sludge retention time 10-20 days, water outlet enters intermediate water tank 3.1; Intermediate water tank 50% effluent recycling to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3,50% water outlets pump into short distance nitration reactor 4 by going out water pump 3.11; Controlling sludge concentration in short distance nitration reactor 4 is 2000-5000mg/L, hydraulic detention time 4-8h, sludge retention time 20-30 days, dissolved oxygen maintains 2mg/L, with the sodium hydroxide of 2mol/L, regulates pH value to make it maintain 8.0-8.5, and its water outlet enters settling tank 4.2, after mud-water separation, supernatant liquor enters blowoff basin 5, and precipitating sludge is back to the first lattice chamber of short distance nitration reactor 4, and control of reflux ratio is at 50%-100%; Nitrification liquid in blowoff basin 5 is back to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor with 100% reflux ratio by nitrification liquid reflux pump 5.2; After processing, water outlet and mud are respectively by water shoot 5.1 and mud valve 3.4, exhaust-valve 4.4 discharges.
The present invention has following beneficial effect:
The present invention combines in the reactions such as Anammox, sludge fermentation, denitrification in same reactor and carries out, key is to guarantee that the nitrite nitrogen refluxing can all remove the ammonia nitrogen of sludge fermentation release by Anammox effect, the voltaile fatty acid that denitrifying bacteria utilizes sludge fermentation to produce subsequently becomes nitrogen as electron donor by the nitrite nitrogen of rest part, nitric nitrogen Restore All, and the efficient degree of depth that reaches total nitrogen is removed.This device has good practicality and reliability.Compare with traditional sludge carbon source development technology, also have the following advantages:
(1) stable.This device can be resisted certain ammonia nitrogen and impact, even if short distance nitration reactor can not be played effectiveness completely, autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor still can be removed nitric nitrogen by denitrification.
(2) fermentation rate is high.In the process of sludge fermentation coupling denitrification, tunning is consumed in a large number by denitrification flora, has weakened substrate inhibition, and fermentation rate is eluriated technique with traditional sludge fermentation and compared and will further improve.
(3) economical and efficient.Realize the minimizing disposal and utilization of bio-denitrifying sewage system self residual mud, improve mud and sewage processing efficiency, save processing cost and floor space.
Accompanying drawing explanation
Fig. 1 is the structural representation of apparatus of the present invention.
Main nomenclature is as follows:
1-raw water box 2-storage basin 4-short distance nitration reactor
5-blowoff basin 3-autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor
1.1-intake pump 2.1-enters dredge pump 2.2-and enters mud control valve
3.1-intermediate water tank 3.2-recycle pump 3.3-circulation control valve
3.4-mud valve 3.5-gas collector 3.6-sealing plate
3.7-cylindrical sludge bed 3.8-water-distributing device 3.9-triphase separator
3.10-heating zone device 3.11-goes out water pump 4.1-aerating apparatus
4.2-settling tank 4.3-sludge reflux pump 4.4-exhaust-valve
5.1-water shoot 5.2-nitrification liquid reflux pump
Embodiment
In conjunction with the accompanying drawings and embodiments the present invention is described in further detail.
As shown in Figure 1, low carbon-nitrogen ratio sewage autotrophic denitrification synchronous sludge fermentation coupling denitrification device is provided with raw water box 1, storage basin 2, autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3, short distance nitration reactor 4, blowoff basin 5; Raw water box 1 is connected with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 bottoms by intake pump 1.1, and autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 is connected with the first lattice of short distance nitration reactor 4 chamber by going out water pump 3.11; Be crisscross arranged the up and down dividing plate of water hole of short distance nitration reactor 4 use is divided into 4-9 lattice chamber, each lattice chamber is provided with aerating apparatus 4.1, short distance nitration reactor 4 ends are connected with settling tank 4.2, settling tank 4.2 bottoms are connected with the first lattice of short distance nitration reactor 4 chamber by sludge reflux pump 4.4, and settling tank 4.2 water outlets are connected with blowoff basin 5; Blowoff basin 5 is provided with water shoot 5.1, by nitrification liquid reflux pump 5.2, is connected with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 bottoms.
Autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 is provided with cylindrical sludge bed 3.7, and top is provided with top sealing plate 3.6 and triphase separator 3.9, and centre is provided with temperature control heating belting 3.10, and bottom is provided with water-distributing device 3.8; The top of triphase separator 3.9 is communicated with gas collector 3.5; Cylindrical sludge bed 3.7 top water outlets are connected with cylindrical sludge bed 3.7 bottoms by intermediate water tank 3.1, recycle pump 3.2 and circulation control valve 3.3 successively; Storage basin 2 is by entering dredge pump 2.1 and entering mud control valve 2.2 and autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor 3 bottoms and be connected, and blowoff basin 5 is connected by nitrification liquid reflux pump 5.2 and autotrophic denitrification synchronous sludge coupling denitrification reactor 3 bottoms of fermenting.
Concrete test water adopts the additional bicarbonate of ammonia of Beijing University of Technology's dependents' district sanitary sewage as former water, and concrete water quality is as follows: pH is 6.8-7.3, and COD concentration is 120-180mg/L, NH
4 +-N concentration is 150-220mg/L, NO
2 --N and NO
3 --N is all below detectability, and COD/N concentration ratio is 0.55-1.2.Test mud that add every day is the fresh excess sludge (SS be 9600-12000mg/L) of certain pilot scale after concentrating.Short distance nitration reactor useful volume 9L used, be divided into 8 lattice chambers, each lattice chamber by dividing plate up and down staggered water flowing duct connect, hydraulic detention time 7.2h, sludge retention time 20 days, sludge concentration 4000-5000mg/L, return sludge ratio 60%, the useful volume of autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor is 5L, hydraulic detention time is 4.8h, sludge retention time 15 days, nitrification liquid reflux ratio 100%.Concrete operation process is as follows:
(1) in raw water box and storage basin, fill with respectively high ammonia-nitrogen wastewater and fresh excess sludge.
(2) open into dredge pump, the fresh excess sludge in storage basin is injected to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor; Open intake pump high ammonia-nitrogen wastewater is injected to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor, after it is filled it up with, inject intermediate water tank; By recycle pump by intermediate water tank 50% effluent recycling to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor bottom.
Before system is moved continuously, first autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor is started, detailed process is: control sludge concentration 7000-8000mg/L in autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor, hydraulic detention time 3-5h, sludge retention time 10-20 days, water inlet adopts NH
4 +-N and NO
2 --N mass ratio is the artificial distribution of 1:1.3, initial TN concentration is 20mg/L and progressively increases nitrogen load until 200mg/L with the gradient of 20mg/L, each time that increases nitrogen load is that autotrophic denitrification rate surpasses 95% and continue to maintain more than 15 days, finally completes the Anammox acclimation to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor; Water inlet adopts NH
4 +-N and NO
2 --N mass ratio is the artificial distribution that 1:1.3 and TN are 200mg/L, add sodium acetate as denitrifying carbon source, to make SCOD concentration be 100-150mg/L simultaneously, when TN clearance is higher than 90% and while continuing to maintain more than 15 days, Anammox and denitrifying coupling successfully realize; The excess sludge substituted acetic acid sodium of usining makes SCOD concentration continue to maintain 100-150mg/L as denitrifying carbon source, when TN clearance is higher than 90% and while continuing to maintain more than 15 days, reaches the realization of autotrophic denitrification synchronous sludge fermentation coupling denitrification.
(3) water outlet of intermediate water tank 50% pumps into short distance nitration reactor by going out water pump; Short distance nitration reactor dissolved oxygen maintains 2mg/L, with the sodium hydroxide of 2mol/L, regulate pH value to make it maintain 8.0-8.5, water outlet enters settling tank, after mud-water separation, supernatant liquor enters blowoff basin, wherein nitrification liquid is back to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor with 100% reflux ratio by nitrification liquid reflux pump, and water outlet is discharged system by water shoot.
Before system is moved continuously, first short distance nitration reactor is started, detailed process is: the nitrifying sludge of actual cities sanitary sewage disposal factory of take is that seed sludge injects short distance nitration reactor, control sludge concentration is 2000-5000mg/L, hydraulic detention time 4-8h, sludge retention time 20-30 days; Actual cities sanitary sewage is pumped into the head end of short distance nitration reactor, start subsequently aerating apparatus and carry out nitrification, regulate aerating apparatus to make dissolved oxygen in nitrifying process maintain 2mg/L, with the sodium hydroxide of 2mol/L, regulate pH value to make it maintain 8.0-8.5, water outlet enters settling tank, precipitating sludge is back to the first lattice chamber of short distance nitration reactor, and control of reflux ratio is at 50%-100%.Move under these conditions short distance nitration reactor, when water outlet nitrite accumulation rate is greater than 90% and while continuing to maintain more than 15 days, the success of short distance nitration reactor start-up.
(4) processing rear water outlet and mud discharges by water shoot and mud valve, exhaust-valve respectively.
Continuous test-results shows: when autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor sludge concentration 7000-8000mg/L, utilize it to process high ammonia-nitrogen wastewater, the pH value of final outflow water is 7.8-8.3, ammonia nitrogen concentration 1.5-6.2mg/L, total nitrogen concentration 12-25mg/L, COD value 40-60mg/L, simultaneously mud decrement approximately 30%.System has successfully realized synchronous sludge fermentation, sewage denitrification and autotrophic denitrification.
Claims (2)
1. a low carbon-nitrogen ratio sewage autotrophic denitrification synchronous sludge fermentation coupling denitrification device, is characterized in that: described device is provided with raw water box (1), storage basin (2), autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3), short distance nitration reactor (4), blowoff basin (5); Raw water box (1) is connected with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3) bottom by intake pump (1.1), and autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3) is connected with the first lattice of short distance nitration reactor (4) chamber by going out water pump (3.11); Short distance nitration reactor (4) is divided into 4-9 lattice chamber with the dividing plate of the water hole that is crisscross arranged up and down, each lattice chamber is provided with aerating apparatus (4.1), short distance nitration reactor (4) end is connected with settling tank (4.2), settling tank (4.2) bottom is connected with the first lattice of short distance nitration reactor (4) chamber by sludge reflux pump (4.4), and settling tank (4.2) water outlet is connected with blowoff basin (5) by pipeline; Blowoff basin (5) is provided with water shoot (5.1), by nitrification liquid reflux pump (5.2), is connected with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3) bottom;
Autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3) is provided with cylindrical sludge bed (3.7), top is provided with top sealing plate (3.6) and triphase separator (3.9), centre is provided with temperature control heating belting (3.10), and bottom is provided with water-distributing device (3.8); The top of triphase separator (3.9) is communicated with gas collector (3.5); Cylindrical sludge bed (3.7) top water outlet is connected with cylindrical sludge bed (3.7) bottom by intermediate water tank (3.1), recycle pump (3.2) and circulation control valve (3.3) successively; Storage basin (2) is by entering dredge pump (2.1) and entering mud control valve (2.2) and autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3) bottom and be connected, and blowoff basin (5) is fermented bottom coupling denitrification reactor (3) and is connected by nitrification liquid reflux pump (5.2) and autotrophic denitrification synchronous sludge.
2. application rights requires the method that the autotrophic denitrification synchronous sludge fermentation coupling denitrification device described in 1 carries out low carbon-nitrogen ratio sewage processing, it is characterized in that, comprises the following steps:
Step 1: start short distance nitration reactor (4): the nitrifying sludge of actual cities sanitary sewage disposal factory of take is that seed sludge injects short distance nitration reactor (4), control sludge concentration is 2000-5000mg/L, hydraulic detention time 4-8h, sludge retention time 20-30 days; Actual cities sanitary sewage is pumped into the head end of short distance nitration reactor (4), start subsequently aerating apparatus (4.1) and carry out nitrification, regulate aerating apparatus (4.1) to make dissolved oxygen in nitrifying process maintain 2mg/L, with sodium hydroxide, regulate pH value to make it maintain 8.0-8.5, water outlet enters settling tank (4.2), precipitating sludge is back to the first lattice chamber of short distance nitration reactor (4), and control of reflux ratio is at 50%-100%; Move under these conditions short distance nitration reactor (4), when water outlet nitrite accumulation rate is greater than 90% and while continuing to maintain more than 15 days, the success of short distance nitration reactor start-up;
Step 2: start autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3): control sludge concentration 7000-8000mg/L in autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3), hydraulic detention time 3-5h, sludge retention time 10-20 days, water inlet adopts NH
4 +-N and NO
2 --N mass ratio is the artificial distribution of 1:1.3, initial TN concentration is 20mg/L and progressively increases nitrogen load until 200mg/L with the gradient of 20mg/L, each time that increases nitrogen load surpasses 95% and continue to maintain above judgement in 15 days with autotrophic denitrification rate, finally completes the Anammox acclimation to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3); Water inlet adopts NH
4 +-N and NO
2 --N mass ratio is the artificial distribution that 1:1.3 and TN are 200mg/L, add sodium acetate as denitrifying carbon source, to make SCOD concentration be 100-150mg/L simultaneously, when TN clearance is higher than 90% and while continuing to maintain more than 15 days, Anammox and denitrifying coupling successfully realize; The excess sludge substituted acetic acid sodium of usining makes SCOD concentration continue to maintain 100-150mg/L as denitrifying carbon source, when TN clearance is higher than 90% and while continuing to maintain more than 15 days, reaches the realization of autotrophic denitrification synchronous sludge fermentation coupling denitrification;
Step 3: short distance nitration reactor (4) completes respectively after startup with autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3), by whole device series operation: open into dredge pump (2.1), the fresh excess sludge in storage basin is injected to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3); Open intake pump (1.1) former water is injected to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3), control wherein sludge concentration 7000-8000mg/L, hydraulic detention time 3-5h, sludge retention time 10-20 days, water outlet enters intermediate water tank (3.1); Intermediate water tank 50% effluent recycling is to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor (3), and 50% water outlet pumps into short distance nitration reactor (4) by going out water pump (3.11); Controlling sludge concentration in short distance nitration reactor (4) is 2000-5000mg/L, hydraulic detention time 4-8h, sludge retention time 20-30 days, dissolved oxygen maintains 2mg/L, with sodium hydroxide, regulates pH value to make it maintain 8.0-8.5, and its water outlet enters settling tank (4.2), after mud-water separation, supernatant liquor enters blowoff basin (5), and precipitating sludge is back to the first lattice chamber of short distance nitration reactor (4), and control of reflux ratio is at 50%-100%; Nitrification liquid in blowoff basin (5) is back to autotrophic denitrification synchronous sludge fermentation coupling denitrification reactor with 100% reflux ratio by nitrification liquid reflux pump (5.2); After processing, water outlet and mud are respectively by water shoot (5.1) and mud valve (3.4), exhaust-valve (4.4) discharge.
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| CN104310585A (en) * | 2014-10-12 | 2015-01-28 | 北京工业大学 | Device and method for treating municipal sewage with low carbon nitrogen ratio by half nitrification-denitrification anaerobic ammonia oxidation |
| CN105776546A (en) * | 2016-05-18 | 2016-07-20 | 扬州大学 | Sewage shortcut nitrification system |
| CN106115911A (en) * | 2016-08-10 | 2016-11-16 | 广州市金龙峰环保设备工程有限公司 | A kind of vinasse fermentation produces the device and method of biogas |
| CN106115911B (en) * | 2016-08-10 | 2019-02-15 | 广州市金龙峰环保设备工程股份有限公司 | A kind of device and method of vinasse fermentation production biogas |
| CN108373201A (en) * | 2018-04-28 | 2018-08-07 | 杭州师范大学 | A kind of processing method and dedicated unit of low ratio of carbon to ammonium ammonia nitrogen waste water |
| CN111333178A (en) * | 2020-02-29 | 2020-06-26 | 北京工业大学 | Device and method for enhancing autotrophic nitrogen removal and synchronous phosphorus recovery of nitrate wastewater through alkaline sludge fermentation |
| CN111333178B (en) * | 2020-02-29 | 2021-09-24 | 北京工业大学 | Device and method for enhancing autotrophic nitrogen removal and synchronous phosphorus recovery of nitrate wastewater through alkaline sludge fermentation |
| CN112723540A (en) * | 2021-01-14 | 2021-04-30 | 上海大学 | Device and method for synchronously recovering phosphorus in sludge digestive fluid in sewage denitrification process |
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| CN103739066B (en) | 2015-12-02 |
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