CN215161925U - Nitrosation-anaerobic ammonia oxidation treatment device after anaerobic digestion of organic matters - Google Patents
Nitrosation-anaerobic ammonia oxidation treatment device after anaerobic digestion of organic matters Download PDFInfo
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- CN215161925U CN215161925U CN202120523823.8U CN202120523823U CN215161925U CN 215161925 U CN215161925 U CN 215161925U CN 202120523823 U CN202120523823 U CN 202120523823U CN 215161925 U CN215161925 U CN 215161925U
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The utility model discloses a nitrosation-anaerobic ammonium oxidation processing apparatus behind organic matter anaerobic digestion, including consecutive microfiltration machine, the jar of intaking, nitrosation jar, ultrafiltration membrane group, the surge tank, anaerobic ammonium oxidation jar and play water pitcher. The utility model discloses do not need the external heating source, nitrosation and two technologies of anammox are not influenced each other moreover, easily control, establish the regulating tank before the anammox jar, reply ammonia nitrogen nitrite radical unbalance and above both the condition of high load, ensure the benign growth of follow-up anammox fungus.
Description
Technical Field
The utility model relates to an environmental protection field, more specifically the utility model relates to an organic matter anaerobic digestion after nitrosation-anaerobic ammonia oxidation processing apparatus.
Background
At present, anaerobic fermentation of organic solid wastes is an important scientific means for realizing waste recycling and reduction, easily-degradable organic matters are converted into biogas through processes of hydrolytic acidification, methanation and the like in the anaerobic fermentation process, but the anaerobic fermentation treatment time is long, and the biogas slurry has the phenomena of high COD, high ammonia nitrogen, high SS and low BOD, so that the traditional biochemical treatment process is greatly challenged. The denitrification treatment aiming at the high ammonia nitrogen wastewater generally comprises a physicochemical treatment method and a biochemical treatment method. The physicochemical treatment method comprises air stripping, struvite, zeolite adsorption and the like, which is intermediate between cost and denitrification effect, and the biochemical treatment method is more and more used in practice, but the existing transmission biochemical denitrification technology needs an external heating source, and the two processes of nitrosation and anaerobic ammonia oxidation are mutually influenced and are not easy to control, so that the ammonia nitrogen and nitrous acid are easily unbalanced in proportion, and the growth of anaerobic ammonia oxidizing bacteria is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art and provide a nitrosation-anammox treatment device after anaerobic digestion of organic matters.
In order to achieve the purpose, the technical scheme of the utility model is that the nitrosation-anammox processing unit after the anaerobic digestion of organic matters is characterized by comprising a nitrosation area and an anammox processing area, wherein the nitrosation area comprises a microfiltration machine, a water inlet tank, a nitrosation tank and an ultrafiltration membrane group, and the anammox processing area comprises an adjusting tank, an anammox tank and a water outlet tank; the microfiltration machine, advance water pitcher, nitrosation jar, milipore filter group, surge tank, anaerobic ammonium oxidation jar and play water tank and link to each other in proper order, the inlet tube of advancing the water pitcher be connected with the outlet pipe of microfiltration machine and the backward flow mouth that goes out the water pitcher, the outlet pipe of advancing the water pitcher supply water to nitrosation jar and surge tank respectively, the outlet pipe of nitrosation jar advances water piping connection with the milipore filter group, the mud backward flow mouth of milipore filter group be connected with the bottom of nitrosation jar, the inlet tube of surge tank be connected with the outlet pipe of milipore filter group, the outlet pipe of the centrifugal pump behind the jar of intaking and the backward flow mouth of play water tank respectively. The device adopts mutually independent operation processes of the nitrosation area and the anaerobic ammonia oxidation area, ammonia oxidizing bacteria and anaerobic ammonia oxidizing bacteria are not affected with each other, and the control is easy.
Optionally, the inlet tube of microstrainer on set up the intake pump, the backward flow mouth of play water pitcher on set up the backwash pump, the outlet pipe of intake water pitcher and the inlet tube of nitrosation jar between set up first pump, the mud backward flow mouth of ultrafiltration membrane group and nitrosation jar between set up the second pump, regulation jar and anaerobic ammonium oxidation jar between set up the third pump. The water inlet pump can provide power for the wastewater flowing into the micro-filter, the wastewater filtered by the micro-filter in the water inlet tank is pumped into the nitrosation tank by the first pump, the sludge concentrate intercepted by the ultrafiltration membrane group is pumped into the nitrosation tank by the second pump, the water in the regulation tank is pumped into the anaerobic ammonia oxidation tank by the third pump, and the water in the water outlet tank is pumped into the water inlet tank and the regulation tank by the reflux pump.
Optionally, the water inlet tank in set up into water jar monitoring sensor and the jar agitator of intaking, the jar monitoring sensor of intaking and the jar agitator of intaking all with water inlet tank fixed connection. The water inlet tank monitoring sensor comprises a pH probe, an ORP probe, a conductivity probe, a temperature probe, an ammonia nitrogen probe and a COD probe, and can monitor real-time parameters in the water inlet tank, when the ammonia nitrogen concentration is monitored to exceed the load which can be borne by the nitrosation tank, a reflux pump of the water outlet tank and a solenoid valve on a reflux pipe of the water inlet tank are opened, and a stirrer in the water inlet tank can be opened at the same time.
Optionally, a nitrosation tank monitoring sensor, an ejector and a nitrosation tank circulating pump are arranged in the nitrosation tank, the nitrosation tank monitoring sensor, the ejector and the nitrosation tank circulating pump are fixedly connected with the nitrosation tank, the ejector is provided with a fan and a guide cylinder, and the fan and the guide cylinder are fixedly connected with the ejector. The nitrosation jar monitoring sensor includes dissolved oxygen, temperature, pH, oxidation reduction potential probe, and the fan is used for the air feed for the ejector, and the ejector is used for making the efflux, and the play water piping connection ejector water inlet end of circulating pump, draft tube fix the play water outlet end at the ejector, play the effect of water conservancy diversion.
Optionally, an adjusting tank monitoring sensor and an adjusting tank stirrer are arranged in the adjusting tank, and the adjusting tank monitoring sensor and the adjusting tank stirrer are fixedly connected with the adjusting tank. The adjusting tank monitoring sensor comprises nitrite, ammonia nitrogen, pH and a temperature probe, and determines whether to adjust a water inlet pump and a corresponding electromagnetic valve of the nitrosation tank according to the proportion of the ammonia nitrogen nitrite, and a certain amount of high ammonia nitrogen wastewater is introduced into the adjusting tank; and (3) determining whether to start a reflux pump and a corresponding electromagnetic valve of the water outlet tank according to the load of the ammonia nitrogen nitrite, introducing a certain amount of clear water into the adjusting tank, and simultaneously starting a stirrer of the adjusting tank to complete mixing and dilution.
Optionally, a three-phase separator, a water distributor and an anammox tank monitoring sensor are arranged in the anammox tank, the three-phase separator, the water distributor and the anammox tank monitoring sensor are all fixedly connected with the anammox tank, an anammox tank circulating pump is arranged outside the anammox tank, and a water inlet pipe and a water outlet pipe of the anammox tank circulating pump are communicated with the anammox tank. The monitoring sensor of the anaerobic ammonia oxidation tank comprises a pH and oxidation-reduction potential probe, the reaction condition in the tank can be fed back in real time, the incoming water of the anaerobic ammonia oxidation tank is uniformly distributed through a water distributor at the bottom 14-the anaerobic ammonia oxidation tank, and then is uniformly mixed with anaerobic ammonia oxidation granular sludge at the upper part of the water distributor, and ammonia nitrogen and nitrite in the water are removed. The slurry-water-gas three-phase mixture then flows upward to the three-phase separator of the anammox tank where three-phase separation is accomplished.
Optionally, the gap between the micro-filters is smaller than 0.25 mm.
Optionally, the anaerobic ammonia oxidation tank is vertically divided into two spaces with a volume ratio of 1:4 by a three-phase separator in the anaerobic ammonia oxidation tank.
Optionally, the height-diameter ratio of the anaerobic ammonia oxidation tank is greater than 4, and the ascending flow rate of the circulating pump of the anaerobic ammonia oxidation tank is greater than 2.5 m/h.
Optionally, the pore size of the ultrafiltration membrane in the ultrafiltration membrane group is 0.02 um.
The parameters can ensure that the treatment device can stably and effectively carry out nitrosation and anaerobic ammonia oxidation treatment on the organic matters.
The utility model discloses following beneficial effect has:
(1) without an external heating source, the effluent temperature after the anaerobic digestion of organic matters is fully utilized, and is generally about 35 ℃.
(2) The two-section type partial nitrosation-anaerobic ammonia oxidation process is easy to control, and ammonia oxidizing bacteria and anaerobic ammonia oxidizing bacteria are not affected with each other.
(3) The process can reflux part of clear water from the water outlet tank to the water inlet tank to dilute high ammonia nitrogen load inlet water.
(4) The nitrosation tank adopts jet aeration, and ensures high mass transfer efficiency under the condition of low dissolved oxygen, thereby ensuring growth of AOB and inhibiting NOB.
(5) An adjusting tank is arranged in front of the anaerobic ammonia oxidation tank, so that the subsequent benign growth of anaerobic ammonia oxidation bacteria can be ensured in response to the conditions of unbalanced proportion of ammonia nitrogen nitrite and overhigh load of the ammonia nitrogen nitrite and the ammonia nitrogen nitrite.
Drawings
Fig. 1 is a schematic view of a structure flow of the present invention.
1-a water inlet tank monitoring sensor; 2-a water inlet tank stirrer; 3-nitrosation tank monitoring sensor; 4-a guide cylinder; 5-nitrosation tank outlet pipe; 6, a fan; 7-an ejector; 8-nitrosation tank circulation pump; 9-adjusting the tank monitoring sensor; 10-adjusting the tank stirrer; 11-anaerobic ammonia oxidation tank air outlet pipe; 12-a three-phase separator; 13-anammox tank monitoring sensor; 14-a water distributor; 15-anammox tank circulation pump; 20-a water inlet pump; 21-a micro-filter; 22-a water inlet tank; 23-a first pump; 24-a nitrosation tank; 25-a second pump; 26-ultrafiltration membrane module; 27-a conditioning tank; 28-a third pump; 29-anammox tank; 30-a reflux pump; 31-water outlet tank.
Detailed Description
The technical solution of the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
Example (b): the nitrosation-anaerobic ammonia oxidation treatment device (shown in figure 1) after the anaerobic digestion of the organic matters, the wastewater after the anaerobic digestion of the organic matters is conveyed to a micro-filter through a water inlet pump 20, and suspended solid matters are further removed through the micro-filter 21.
After passing through the micro-filter 20, the wastewater enters the water inlet tank 22, and specific water quality parameters including pH/conductivity/temperature/ammonia nitrogen/COD are acquired through the monitoring sensor 1 in the water inlet tank. If the ammonia nitrogen load exceeds the critical value of the load borne by the nitrosation tank 24, the reflux pump 30 is started to be mixed with the water inlet tank stirrer 2 to dilute the incoming water. When ammonia nitrogen bears under the critical value of load at nitrosation jar 24, will implement and convey ammonia nitrogen and COD numerical value to first pump 23, blower 6 and nitrosation jar circulating pump 8 of ejector 7, jointly regulate and control and ensure that the dissolved oxygen of nitrosation jar is in suitable interval to when guaranteeing AOB growth, restrain NOB.
The wastewater is conveyed to a nitrosation tank through a first pump 23, and is fully mixed with ammonia oxidizing bacteria in the nitrosation tank to complete partial nitrosation, wherein the high mass transfer efficiency of oxygen under the condition of low dissolved oxygen is realized through an annular flow state which is jointly built by the ejector 7 and the guide shell 4 which surrounds the ejector. And high-speed efflux among the ejector is realized through nitrosation jar circulating pump 8, and the inlet tube of nitrosation jar circulating pump is connected in jar body bottom, and the outlet pipe of nitrosation jar circulating pump is connected in the end of intaking of ejector 7 to utilize the automatic intake pipe through the ejector of venturi principle to inhale outside gas, make the efflux, also accomplished whole or partial oxygen's supply simultaneously. When ammonia nitrogen and COD in the inlet tube are too high, the fan 6 is also opened, more oxygen is supplied for nitrosation and removal of excessive COD, and the gas outlet pipe 5 of the nitrosation tank is used for discharging gas in the nitrosation tank. In addition, a monitor containing a dissolved oxygen/temperature/pH/oxidation-reduction potential probe is also arranged in the nitrosation tank, and the reaction condition in the tank is fed back in real time.
For accurate regulation and control part nitrosation reaction, formed and contained into water tank monitoring sensor 1, nitrosation jar monitoring sensor 3, first pump 23, fan 6 and nitrosation jar circulating pump 8 for the compound regulation and control system of set. The final partially nitrified wastewater flows out through an overflow weir at the upper part of the tank to an ultrafiltration membrane module 26. The ultrafiltration membrane group intercepts the biomass in the effluent of the nitrosation tank, and part of the biomass flows back to the bottom of the nitrosation tank through the second pump 25, the produced water of the ultrafiltration membrane group continues to flow to the regulation tank, and the other part is discharged periodically.
The same sets up in the adjusting tank 27 and adjusts jar monitoring sensor 9, contains nitrite, ammonia nitrogen, pH and temperature probe to ensure that the play water parameter of adjusting tank can not cause adverse effect to the anaerobic ammonia oxidation fungus in the anaerobic ammonia oxidation jar that connects after in reasonable interval. The effluent of the adjusting tank needs to meet the following two requirements, namely (1) the ratio of ammonia nitrogen to nitrite is 1: 1; (2) the loads of the anaerobic ammonia oxidation sludge and the anaerobic ammonia oxidation sludge do not exceed the critical value of the load of the anaerobic ammonia oxidation sludge. When the ammonia nitrogen in the adjusting tank is insufficient, the first pump 23 is started to supply more ammonia nitrogen to the adjusting tank, and the adjusting tank stirrer 10 is started to complete mixing. When the load of ammonia nitrogen or nitrite is higher than the critical value born by the anaerobic ammonia oxidation sludge, the reflux pump 30 is started to reflux the clear water in the water outlet tank 31 to the adjusting tank, and simultaneously, the stirrer 10 of the adjusting tank is started to complete mixing and dilution. When the two requirements are not met at the same time, the action is completed firstly to meet the requirement (1), and then the requirement (2) is met. Finally, the desired effluent is transported by a third pump 28 to an anammox tank 29.
The water coming from the anaerobic ammonia oxidation tank 29 is uniformly distributed by the water distributor 14 at the bottom, and then is uniformly mixed with the anaerobic ammonia oxidation granular sludge at the upper part of the water distributor, and simultaneously ammonia nitrogen and nitrite are removed. The slurry-water-gas three-phase mixture then flows upward to the three-phase separator 12 of the anammox tank where the three-phase separation is accomplished. The nitrogen gas that produces finally discharges the jar body through top anaerobic ammonia oxidation jar outlet duct 11, and the waste water that accomplishes the denitrification reaction then flows to follow-up water tank through upper portion overflow weir discharge stream, and granular sludge then subsides through three phase separator, gets back to the below reaction zone once more. In order to maintain stable ammonia nitrogen and nitrite removal efficiency, stable granular sludge form is critical, and therefore, the ascending flow velocity of more than 2.5 m/s needs to be produced in a tank body with the height-diameter ratio of more than 4 so as to form the shearing flow state necessary for producing the granular sludge. Therefore, the anaerobic ammonia oxidation tank needs to be provided with a set of internal circulation system, the internal circulation system comprises a circulation pump 15, a circulation water inlet pipe and a circulation water outlet pipe, the circulation water inlet pipe is positioned between the lower part of the water outlet weir and the upper part of the three-phase separator, the water outlet pipe of the internal circulation system is connected with the lower part of the anaerobic ammonia oxidation tank and is connected with the water distributor in the anaerobic ammonia oxidation tank, and the flow rate of a circulation pump of the internal circulation system is adaptively adjusted according to the particle size of the granular sludge. In addition, the anaerobic ammonia oxidation tank monitoring sensor 13 comprises a pH and oxidation-reduction potential probe and feeds back the reaction condition in the tank in real time. The three-phase separator in the anaerobic ammonia oxidation tank contains a precipitator, and in order to ensure the precipitation effect of the granular sludge, enough space between the precipitator and the liquid level needs to be ensured, so that the volume of the upper part of the three-phase separator accounts for 15-20% of the total volume of the tank body, and in addition, the inclined wall angle of the precipitator is determined within the range of 45-60 degrees according to the particle size of the granular sludge in the tank.
The treatment device fully utilizes the temperature of about 35 ℃ of anaerobic fermentation biogas slurry, does not need an external heating source, and simultaneously has heat preservation measures for the microfiltration machine, the water inlet tank, the nitrosation tank, the ultrafiltration membrane group, the regulating tank and the anaerobic ammonia oxidation tank.
The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, which is intended to cover any modifications and variations within the spirit and scope of the appended claims.
Claims (10)
1. A nitrosation-anaerobic ammonia oxidation treatment device after anaerobic digestion of organic matters is characterized by comprising a nitrosation area and an anaerobic ammonia oxidation treatment area, wherein the nitrosation area comprises a microfiltration machine, a water inlet tank, a nitrosation tank and an ultrafiltration membrane group, and the anaerobic ammonia oxidation treatment area comprises a regulating tank, an anaerobic ammonia oxidation tank and a water outlet tank;
the microfiltration machine, advance water pitcher, nitrosation jar, milipore filter group, surge tank, anaerobic ammonium oxidation jar and play water tank and link to each other in proper order, the end of intaking water pitcher be connected with the outlet pipe of microfiltration machine and the backward flow mouth that goes out the water pitcher, the outlet pipe of intaking water pitcher supply water to nitrosation jar and surge tank respectively, the outlet pipe of nitrosation jar advances water piping connection with the milipore filter group, the mud backward flow mouth of milipore filter group be connected with the bottom of nitrosation jar, the inlet tube of surge tank be connected with the outlet pipe of milipore filter group, the outlet pipe of intaking jar back centrifugal pump and the backward flow mouth of play water tank respectively.
2. The device for treating nitritation-anaerobic ammonia oxidation after anaerobic digestion of organic matters according to claim 1, wherein a water inlet pipe of the microfiltration machine is provided with a water inlet pump, a backflow port of the water outlet tank is provided with a backflow pump, a first pump is arranged between a water outlet pipe of the water inlet tank and a water inlet pipe of the nitritation tank, a second pump is arranged between a sludge backflow port of the ultrafiltration membrane group and the nitritation tank, and a third pump is arranged between the adjusting tank and the anaerobic ammonia oxidation tank.
3. The device for treating organic matter subjected to anaerobic digestion and nitrosation-anaerobic ammonia oxidation as claimed in claim 1, wherein a water inlet tank monitoring sensor and a water inlet tank stirrer are arranged in the water inlet tank, and both the water inlet tank monitoring sensor and the water inlet tank stirrer are fixedly connected with the water inlet tank.
4. The device for treating nitritation-anaerobic ammonia oxidation after anaerobic digestion of organic matters according to claim 1, characterized in that a nitritation tank monitoring sensor, an ejector and a nitritation tank circulating pump are arranged in the nitritation tank, the nitritation tank monitoring sensor, the ejector and the nitritation tank circulating pump are fixedly connected with the nitritation tank, a fan and a guide cylinder are arranged on the ejector, and the fan and the guide cylinder are fixedly connected with the ejector.
5. The device for treating nitritation-anaerobic ammonia oxidation after anaerobic digestion of organic matters according to claim 1, wherein a regulating tank monitoring sensor and a regulating tank stirrer are arranged in the regulating tank, and the regulating tank monitoring sensor, the regulating tank stirrer and the regulating tank are fixedly connected.
6. The device for treating organic matter subjected to anaerobic digestion and nitrosation-anammox as claimed in claim 1, wherein a three-phase separator, a water distributor and an anammox tank monitoring sensor are arranged in the anammox tank, the three-phase separator, the water distributor and the anammox tank monitoring sensor are all fixedly connected with the anammox tank, an anammox tank circulating pump is arranged outside the anammox tank, and a water inlet pipe and a water outlet pipe of the anammox tank circulating pump are communicated with the anammox tank.
7. The device for treating nitrosation-anammox after anaerobic digestion of organic matter according to any one of claims 1 to 6, wherein the gap between the screens of said micro-filter is less than 0.25 mm.
8. The apparatus for treating nitritified and anammox after anaerobic digestion of organic matter according to any one of claims 1 to 6, wherein the anaerobic ammoxidation tank is divided into two spaces at a volume ratio of 1:4 by a three-phase separator in the anaerobic ammoxidation tank.
9. The apparatus for treating nitritation-anaerobic ammonia oxidation after anaerobic digestion of organic matter according to any one of claims 1 to 6, wherein the height-diameter ratio of the anaerobic ammonia oxidation tank is greater than 4, and the upward flow velocity of the circulating pump of the anaerobic ammonia oxidation tank is greater than 2.5 m/h.
10. The device for treating nitrosation-anammox after anaerobic digestion of organic matter according to any one of claims 1 to 6, wherein the pore size of the ultrafiltration membrane in said ultrafiltration membrane module is 0.02 um.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120523823.8U CN215161925U (en) | 2021-03-12 | 2021-03-12 | Nitrosation-anaerobic ammonia oxidation treatment device after anaerobic digestion of organic matters |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120523823.8U CN215161925U (en) | 2021-03-12 | 2021-03-12 | Nitrosation-anaerobic ammonia oxidation treatment device after anaerobic digestion of organic matters |
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| CN215161925U true CN215161925U (en) | 2021-12-14 |
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| CN202120523823.8U Active CN215161925U (en) | 2021-03-12 | 2021-03-12 | Nitrosation-anaerobic ammonia oxidation treatment device after anaerobic digestion of organic matters |
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