CN110759467B - Device and method for quickly starting and maintaining shortcut nitrification of municipal sewage based on parachlorometadimethylphenol - Google Patents
Device and method for quickly starting and maintaining shortcut nitrification of municipal sewage based on parachlorometadimethylphenol Download PDFInfo
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Abstract
A device and a method for quickly starting and maintaining short-cut nitrification of urban sewage based on parachlorometaxylenol belong to the field of biological sewage treatment. The device mainly comprises an urban sewage raw water tank, an urban sewage short-cut nitrification device, a parachlorometadimethylphenol sludge treatment device and a sludge reflux device; firstly, 60-70 mg/L of parachlorometaxylenol is added into a reactor in a first period, stirring is carried out for 15-20 h, the activity of nitrobacteria is inhibited, then an inhibitor is not added into the reactor, but part of activated sludge is treated by side flow, on one hand, AOB is quickly recovered, on the other hand, the activity of NOB is continuously inhibited, so that the accumulation of nitrite is realized, and the normal-temperature short-cut nitrification of urban sewage is started. The invention can recover the activity of AOB at the highest speed and elutriate NOB step by step, and can maintain stable short-cut nitrification.
Description
Technical Field
The invention belongs to the field of biological sewage treatment, and relates to a device and a method for quickly starting and stably maintaining normal-temperature short-cut nitrification of municipal sewage based on p-chloro-m-dimethylphenol, which are particularly suitable for biological denitrification treatment of the municipal sewage with low carbon-nitrogen ratio.
Background
With the development of economy and the improvement of the living standard of people, the water environment problem, particularly the water eutrophication problem, is more and more concerned and discussed by people. Although the traditional activated sludge method is the main method for nitrogen and phosphorus removal in the sewage treatment plant at present, the traditional activated sludge method also has the problems of insufficient carbon source, large energy consumption and the like, so that the search for a high-efficiency and energy-saving sewage treatment method is urgent.
In recent years, a short-cut nitrification and denitrification process, namely a short-cut nitrification and anaerobic ammonia oxidation process, is continuously proposed to be applied to an actual sewage treatment plant. In 1975, Votes and the like find that nitrite enrichment occurs in the nitrification stage in the treatment of high-concentration ammonia nitrogen wastewater, and the short-cut nitrification and denitrification biological nitrogen removal theory is put forward for the first time. The SHARON process based on short-cut nitrification, which is the process for carrying out actual sewage treatment by applying the short-cut nitrification and denitrification technology for the first time, is proposed and successfully developed by Dutch Daerfu technology university in 1997. Processes based on short-cut nitration have many advantages, such as: the time of the nitrification stage is shortened, the nitrification speed is improved, and the sludge yield is reduced; about 25% of aeration amount is saved in the nitrification stage, and about 40% of additional carbon source can be saved in the denitrification stage; the hydraulic retention time is shortened, so that the volume of the constructed object is reduced, the capital construction cost is reduced, and the like. However, the short-cut nitrification process has not been popularized, mainly because the actual process cannot maintain a stable short-cut nitrification process, and a stable nitrite source cannot be ensured, thereby affecting the subsequent process.
At present, main methods for realizing short-cut nitrification comprise modes of high Free Ammonia (FA), high Free Nitrous Acid (FNA), high temperature, high pH, low Dissolved Oxygen (DO), low sludge age (SRT), real-time control through water quality parameters such as DO, pH and the like, anoxic and aerobic intermittent aeration and the like. Related documents report that short-cut nitrification can be started by adding inhibitors such as sulfide, chlorate, hydroxylamine and the like, but the phenomenon that NOB generates adaptability to the inhibitors usually occurs after the operation is carried out for a period of time. In addition, sulfide easily causes hydrogen sulfide gas to be generated, air is seriously polluted, and the health of a human body is influenced. When the concentration of sulfide in the sewage is too high, filamentous sulfur bacteria can grow, so that activated sludge expands, the sedimentation performance is poor, and the effluent quality is influenced; chlorate belongs to an explosive chemical, and causes great hidden danger to the safety of a sewage treatment plant, and in addition, the chlorate can damage red blood cells, influence the function of blood transportation oxygen and influence the health of people; hydroxylamine is relatively expensive and unstable in nature, absorbs water and carbon dioxide at room temperature, decomposes rapidly, and is irritating to the respiratory system, skin, eyes, and mucous membranes. In conclusion, none of these inhibitors is suitable for large scale production. The invention adopts the parachlorometaxylenol as the inhibitor to start the normal-temperature short-cut nitrification of the municipal sewage, and strengthens the short-cut nitrification process by a method of treating partial activated sludge by the inhibitor side flow, thereby realizing the long-term stable operation of the short-cut nitrification. The p-chloro-m-dimethylphenol is a broad-spectrum antibacterial agent, can be used for hospital disinfection, can be used as a common medicament, can be used as a common disinfection lotion and is widely applied in daily life, such as a bactericidal soap, a hand sanitizer, shampoo and the like, wherein the volume concentration of the p-chloro-m-dimethylphenol in the disinfection lotion is 4-5 percent, and the volume concentration of the p-chloro-m-dimethylphenol in a washing article can also reach 0.25 percent. The volume concentration of the parachlorometaxylenol is below 0.01 percent, so the parachlorometaxylenol is a relatively safe inhibitor and can be applied to the starting of the normal-temperature short-cut nitrification of the municipal sewage of an actual sewage treatment plant.
Disclosure of Invention
The invention aims to provide a device and a method for starting and stably maintaining normal-temperature short-cut nitrification of municipal sewage. And then, part of sludge is periodically treated by the inhibitor side-stream treatment device to strengthen the stable operation of short-cut nitrification, and a stable nitrite source is provided for the processes of urban sewage mainstream anaerobic ammonia oxidation and the like.
The utility model provides a device based on it is nitrified with stable municipal sewage normal atmospheric temperature short cut of maintaining fast to chlorine meta-dimethylphenol, its characterized in that: comprises an urban sewage raw water tank (1), an urban sewage short-cut nitrification device (9), a parachlorometaxylenol sludge treatment device (18) and an intermediate water tank (10);
the urban sewage short-cut nitrification device (9) is connected with an urban sewage raw water tank (1) through a first water inlet valve (3), a first water inlet pump (2) and a flow meter (5), an aeration pump (4) is connected with an aeration disc (6) arranged at the bottom of the urban sewage short-cut nitrification device (9), and a first water discharge valve (7) and a first sludge valve (8) are arranged on the side surface of the urban sewage short-cut nitrification device (9); the first sludge valve (8) is connected with the intermediate water tank (10), and the intermediate water tank (10) is connected with a p-chloro-m-dimethylphenol sludge treatment device (18) through a first reflux pump (11) and a second sludge valve (12); a stirrer (16) is arranged in the p-chloro-m-dimethylphenol sludge treatment device (18), a dosing pump (17) and a second drain valve (15) are also arranged, and the side surface of the p-chloro-m-dimethylphenol sludge treatment device (18) is connected with the urban sewage short-cut nitrification device (9) through a third sludge valve (13) and a second reflux pump (14). The dosing pump (17) is used for dosing the chloro-m-dimethylphenol.
The method for quickly starting and stably maintaining the short-cut nitrification based on the chloroxylenol by adopting the device is a method for quickly starting the short-cut nitrification finally by performing side-stream pretreatment on activated sludge by the chloroxylenol under the condition of higher DO at normal temperature and utilizing different recovery conditions after the activities of AOB and NOB are inhibited; the method comprises the following specific steps:
starting the short-cut nitrification process:
1) inoculating flocculent sludge into the urban sewage short-cut nitrification device (9): the inoculation sludge is full-process nitrified sludge returned from a secondary sedimentation tank of the urban sewage treatment plant, so that the concentration of the inoculation sludge is 3500-4000 mg/L;
2) adding 60-70 mg/L para-chloro-meta-dimethylphenol into the urban sewage short-cut nitrification device (9), stirring for 15-20 h, and inhibiting the activity of nitrifying bacteria by utilizing the para-chloro-meta-dimethylphenol; after stirring, washing the activated sludge for three times by using tap water;
3) under the condition of normal temperature, municipal sewage enters a municipal sewage short-cut nitrification device (9) from a municipal sewage raw water tank (1) through a first water inlet pump (2), the hydraulic retention time of a reactor is 3 hours, the water discharge ratio of the reactor is 50 percent, an aeration pump (4) is started after water inlet is finished, and DO is controlled to be 2-4 mg/L through a flowmeter (5); the sequencing batch reaction is adopted, and the single-cycle operation mode is as follows: feeding water for 10min, aerating for 150min (wherein partial exchange of sludge, namely partial discharge and reflux operation, is carried out 15min before the aeration is stopped), precipitating for 20min, draining for 10min, and standing for 50 min; in the operation mode, the activity of AOB in the activated sludge is recovered; and then, in each period, the parachlorometaxylenol is not directly added into the municipal sewage short-cut nitrification device (9), but partial exchange of activated sludge is carried out to realize the lateral flow inhibition treatment of the parachlorometaxylenol.
The operation steps of partial exchange of sludge, namely partial discharge and backflow are periodically carried out:
performing a side stream treatment of activated sludge on the p-chloro-m-dimethylphenol by using a p-chloro-m-dimethylphenol sludge treatment device (18); the activated sludge of 1/2-1/4 flows into the intermediate water tank (10) through the first sludge valve (8) 15min before the aeration stage of the municipal sewage short-cut nitrification reaction device (9) is finished; then the activated sludge in the p-chloro-m-dimethylphenol sludge treatment device (18) enters the municipal sewage short-cut nitrification reactor (9) through a third sludge valve (13) and a second reflux pump (14); and finally, the activated sludge in the intermediate water tank (10) enters a p-chloro-m-dimethylphenol sludge treatment device (18) through a first return pump (11) and a second sludge valve (12) so as to finish the sludge return operation.
Enhancing shortcut nitrification by side flow inhibition treatment:
after the municipal sewage short-cut nitrification reaction device (9) and the p-chloro-m-dimethylphenol sludge treatment device (18) exchange sludge through the sludge reflux device, a timer is set according to the pretreatment time of a side stream inhibitor (the time from adding p-chloro-m-dimethylphenol to exchange is preferably 15-20 h) to control the switch of the stirrer (16), 60-70 mg/L of p-chloro-m-dimethylphenol is added into the p-chloro-m-dimethylphenol sludge treatment device (18) through a dosing pump (17), and the sludge treatment device and the sludge reflux device operate once a day.
Monitoring whether the effluent nitrite accumulation rate reaches more than 85% after the aeration is finished; if the nitrite accumulation rate reaches more than 85 percent and the operation is stable for more than 7 days, the normal-temperature short-cut nitrification of the municipal sewage is successfully started; after stable operation for a period of time, the treatment exchange frequency of adding p-chloro-m-dimethylphenol can be reduced to once in three days; if the accumulation rate of the nitrite in the effluent water does not reach more than 85 percent, performing treatment according to the original treatment frequency once a day until the accumulation rate of the nitrite reaches more than 85 percent and the effluent water stably runs for more than 7 days; the treatment frequency can be gradually shortened, and the parachlorometaxylenol side flow treatment is finally stopped, so that the stable short-cut nitrification process is maintained.
The invention successfully starts the normal-temperature short-cut nitrification of the municipal sewage by the method for pretreating the chlorine-meta-dimethylphenol side-stream sludge. The invention has the beneficial effects that:
(1) the method is suitable for low-ammonia nitrogen urban sewage, and can provide a stable nitrite source for the mainstream anaerobic ammonia oxidation process of the urban sewage;
(2) the device mainly comprises two sets of SBR reactors, is convenient to operate and control, is easy to operate and has strong feasibility;
(3) according to the invention, parachlorometaxylenol is utilized to quickly start normal-temperature short-cut nitrification of municipal sewage, and a side-stream treatment device is used as an auxiliary, so that the activity of NOB can be inhibited for a long time, and the activity of AOB in the mainstream reactor is not influenced, thus the NOB is elutriated, and the long-lasting and stable normal-temperature short-cut nitrification of the municipal sewage is realized.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus used in the present invention, as shown in fig. 1: 1-city sewage raw water tank; 2-a first water inlet pump; 3-a first inlet valve; 4-an aeration pump; 5-a flow meter; 6, an aeration disc; 7-a first drain valve; 8-a first sludge valve; 9-municipal sewage short-cut nitrification device; 10-an intermediate water tank; 11-a first reflux pump; 12-a second sludge valve; 13-third sludge valve; 14-a second reflux pump; 15-a second drain valve; 16-a stirrer; 17-a dosing pump; 18-p-chloro-m-dimethylphenol sludge treatment device;
FIG. 2 shows short-cut nitre of example 1For converting NH in different stages4 +-N、NO2 --N、NO3 --N and the rate of nitrite accumulation;
FIG. 3 shows the different stages of NH of short-cut nitrification in example 24 +-N、NO2 --N、NO3 -N and the rate of nitrite accumulation.
Detailed Description
The technical solutions of the present invention will be further described below with reference to the test examples, but the present invention is not limited to these examples.
Example 1
The normal-temperature short-range nitrification device for the municipal sewage adopted by the method is an SBR reactor, the material is organic glass, the effective volume is 9L, and the drainage ratio of the reactor is 50%. The bottom of the reactor is provided with an aeration device, air is compressed by an aeration pump, and air is released by a microporous aeration head; the p-chloro-m-dimethylphenol sludge treatment device is also an SBR reactor, is made of organic glass and has the effective volume of 5L; both the water inlet and the water outlet of the peristaltic pump and the water outlet of the electric drain valve are controlled automatically by the time control timer, and the reflux of the sludge is carried out by the reflux peristaltic pump.
Activated sludge inoculated in the reactor is excess sludge from a secondary sedimentation tank of a certain municipal sewage treatment plant in Beijing, the retrieved excess sludge is washed for multiple times and then inoculated into the reactor, and the sludge concentration is 3000-3500 mg/L after inoculation. And during the operation of the reactor, the temperature is normal temperature (20 +/-3 ℃) and the pH is 7.0-8.5. Each period of the short-cut nitrification SBR comprises five stages of water inlet for 10min, aeration for 150min (sludge removal and backflow operation is carried out 15min before the aeration is stopped), sedimentation for 20min, water drainage for 10min and idling for 50 min.
The actual urban sewage is adopted during the test, and the water quality is characterized in that: NH (NH)4 +-N is 75.07 + -15.23 mg/L, NO2 -N is 1.23. + -. 0.24mg/L, NO3 -N is 0.75 plus or minus 0.21mg/L, Total Nitrogen (TN) is 77.05 plus or minus 15.68mg/L, and COD is 250.12 plus or minus 55.98 mg/L.
After the sludge activity is recovered to a normal level through aeration, the sludge treatment is started by utilizing the p-chloro-m-dimethylphenol, and the normal-temperature short-cut nitrification of the municipal sewage is started. In the first period, 65mg/L of parachlorometaxylenol is added into the urban sewage short-cut nitrification reaction device (9) and stirred for 18 hours, and the parachlorometaxylenol is utilized to inhibit the activity of nitrifying bacteria; after stirring, washing the activated sludge for three times by using tap water;
under the condition of normal temperature, urban sewage enters an urban sewage short-cut nitrification reaction device (9) from an urban sewage raw water tank (1) through a first water inlet pump (2), the hydraulic retention time of the reactor is 3 hours, the water discharge ratio of the reactor is 50%, an aeration pump (4) is started after water inlet is finished, and DO is controlled to be 2-4 mg/L through a flowmeter (5); the single cycle operation mode is as follows: feeding water for 10min, aerating for 150min (sludge removal and reflux operation is carried out 15min before aeration stops), precipitating for 20min, draining for 10min, and standing for 50 min; in this mode of operation, the activity of AOB in the activated sludge is restored. And then, the side flow inhibition treatment of part of activated sludge is carried out by a sludge reflux device instead of directly adding p-chloro-m-dimethylphenol into the municipal sewage short-cut nitrification reactor (9).
Performing a side stream treatment of activated sludge on the p-chloro-m-dimethylphenol by using a p-chloro-m-dimethylphenol sludge treatment device (18); 1/3 activated sludge flows into the intermediate water tank (10) through the first sludge valve (8) 15min before the aeration stage of the municipal sewage short-cut nitrification reaction device (9) is finished; then the activated sludge in the p-chloro-m-dimethylphenol sludge treatment device (18) enters the municipal sewage short-cut nitrification reactor (9) through a third sludge valve (13) and a second reflux pump (14); finally, the activated sludge in the intermediate water tank (10) enters a p-chloro-m-dimethylphenol sludge treatment device (18) through a first reflux pump (11) and a second sludge valve (12) so as to complete the sludge reflux operation;
after the municipal sewage short-cut nitrification reaction device (9) and the p-chloro-m-dimethylphenol sludge treatment device (18) exchange sludge through a sludge reflux device, starting a stirrer (15) to pretreat the p-chloro-m-dimethylphenol for 18 hours, adding 65mg/L of the p-chloro-m-dimethylphenol into the sludge treatment device through a dosing pump (17), and operating the sludge treatment device and the sludge reflux device once a day;
the change of the trinitrogen parameter during the start-up and steady operation of the short-cut nitrification is shown in fig. 2. The present embodiment is divided into five phases, phase I being a start-up phase (once a day), phase II being a steady operation phase (once a day), phase III being a three-day once-treatment frequency phase, phase IV being a five-day once-treatment frequency phase, and phase V being a stop-treatment phase. At the initial stage of starting, the ammoxidation effect is gradually inhibited, meanwhile, the nitrite oxidation effect is also obviously inhibited, and the effluent mainly contains ammonia nitrogen and nitrite nitrogen. At the 20 th day, the ammoxidation effect is recovered to be normal, the ammonia nitrogen removal rate reaches more than 98%, the effluent mainly contains nitrite at the moment, the nitrite accumulation rate reaches 81%, and the method shows that partial sludge side flow strengthening treatment on the chloroxylenol can enable AOB to gradually recover the activity and continuously inhibit the NOB activity, and finally elutriates the NOB to realize short-cut nitrification. Stably running to 34 days, the nitrite accumulation rate reaches over 90 percent, and NOB has no sign of activity recovery; after the short-cut nitrification is stably operated for 30 days, the side stream treatment frequency is reduced to once for three days, the operation is continued for 30 days, the ammonia nitrogen removal rate is maintained to be more than 98%, and the nitrite accumulation rate is still maintained to be more than 90%; then, on the 97 th to 127 th days, the stability of short-range nitration by utilizing p-chloro-m-dimethylphenol is further considered, the treatment frequency is changed to be once for five days, and the nitrite accumulation rate is still maintained to be about 90 percent during the treatment, which indicates that NOB is gradually elutriated and the short-range damage is not caused even if the treatment frequency of the lateral flow inhibitor is reduced; stopping the treatment of the chloroxylenol sludge by side flow from 128 th to 160 th days, keeping the nitrite accumulation rate of the reactor above 90 percent, having good short-cut nitrification effect, and enabling the normal-temperature short-cut nitrification of the municipal sewage to be capable of stably operating for a long time.
Example 2
This embodiment differs from example 1 in that: after the shortcut nitrification is rapidly started by utilizing the p-chloro-m-dimethylphenol and the shortcut nitrification process is enhanced by the sludge treatment of the lateral flow inhibitor, the treatment of the lateral flow inhibitor is directly stopped, rather than gradually reducing the treatment frequency. The other steps and parameters were the same as in example 1.
The change of the trinitrogen parameter during the start-up and steady operation of the short-cut nitrification is shown in fig. 2. The present embodiment is divided into three phases, phase I start-up phase (once per day), phase II steady run phase (once per day), and phase III stop sidestream treatment phase. The starting stage of the stage I and the stable operation stage of the stage II are similar to the conditions of the example 1, the activity of activated sludge nitrifying bacteria is inhibited by utilizing p-chloro-m-dimethylphenol for about 15 days, the activity of AOB is basically recovered to a normal level, and simultaneously the activity of NOB is ensured to be very low, so that the nitrite accumulation rate reaches more than 80 percent; in the stable operation stage, the nitrite accumulation rate is stably maintained to be more than 85 percent, and the ammonia nitrogen removal rate is ensured to be more than 98 percent; in contrast to example 1, stage III stopped the sidestream treatment stage, with the aim of exploring the dependence of short-cut nitrification with para-chloro-meta-dimethylphenol on inhibitors and the stability of short-cut nitrification. The nitrite accumulation rate is basically maintained between 85 percent and 90 percent within 170 days after stopping the side flow treatment, and the stable short-cut nitrification can be still maintained, which shows that once the invention realizes the short-cut nitrification by utilizing the parachlorometaxylenol and stably operates for a period of time, the use of the inhibitor can be stopped, and the good short-cut effect can be still maintained.
The foregoing is a detailed description of the invention that will enable those skilled in the art to better understand and practice the invention, and it is not to be limited thereby, since simple modifications and variations can be made by those skilled in the art without departing from the scope of the invention.
Claims (2)
1. A method for quickly starting and stably maintaining normal-temperature short-cut nitrification of municipal sewage based on p-chloro-m-dimethylphenol is characterized in that an adopted device comprises a municipal sewage raw water tank (1), a municipal sewage short-cut nitrification device (9), a p-chloro-m-dimethylphenol sludge treatment device (18) and a middle water tank (10);
the urban sewage short-cut nitrification device (9) is connected with an urban sewage raw water tank (1) through a first water inlet valve (3), a first water inlet pump (2) and a flow meter (5), an aeration pump (4) is connected with an aeration disc (6) arranged at the bottom of the urban sewage short-cut nitrification device (9), and a first water discharge valve (7) and a first sludge valve (8) are arranged on the side surface of the urban sewage short-cut nitrification device (9); the first sludge valve (8) is connected with the intermediate water tank (10), and the intermediate water tank (10) is connected with a p-chloro-m-dimethylphenol sludge treatment device (18) through a first reflux pump (11) and a second sludge valve (12); a stirrer (16) is arranged in the p-chloro-m-dimethylphenol sludge treatment device (18), a dosing pump (17) and a second drain valve (15) are also arranged at the same time, and the side surface of the p-chloro-m-dimethylphenol sludge treatment device (18) is connected with the urban sewage short-cut nitrification device (9) through a third sludge valve (13) and a second reflux pump (14); the dosing pump (17) is used for dosing the chloro-m-dimethylphenol;
the method is a method for performing side-stream pretreatment on activated sludge by using chloro-m-dimethylphenol under the condition of high DO at normal temperature, and finally quickly starting shortcut nitrification by utilizing different recovery conditions after the activity gains of AOB and NOB are utilized; the method comprises the following specific steps:
starting the short-cut nitrification process:
1) inoculating flocculent sludge into the urban sewage short-cut nitrification device (9): the inoculated sludge is return full-course nitrified sludge of a secondary sedimentation tank of the urban sewage treatment plant, and the concentration of the inoculated sludge is 3500-4000 mg/L;
2) 60-70 mg/L of parachlorometaxylenol is added into the urban sewage short-cut nitrification device (9) and stirred for 15-20 h, and the parachlorometaxylenol is utilized to inhibit the activity of nitrifying bacteria; after stirring, washing the activated sludge for three times by using tap water;
3) under the condition of normal temperature, domestic sewage enters an urban sewage short-cut nitrification device (9) from an urban sewage raw water tank (1) through a first water inlet pump (2), the hydraulic retention time of a reactor is 3 hours, the water discharge ratio of the reactor is 50%, an aeration pump (4) is started after water inlet is finished, and DO is controlled to be 2-4 mg/L through a flowmeter (5); the sequencing batch reaction is adopted, and the single-cycle operation mode is as follows: feeding water for 10min, aerating for 150min, performing partial sludge exchange (partial discharge and reflux operation) 15min before the aeration stops, precipitating for 20min, draining for 10min, and standing for 50 min; in the operation mode, the activity of AOB in the activated sludge is recovered; then, in each period, the parachlorometaxylenol is not directly added into the municipal sewage short-cut nitrification device (9), but the parachlorometaxylenol side flow inhibition treatment is realized through partial exchange of sludge;
monitoring whether the effluent nitrite accumulation rate reaches more than 85% after the aeration is finished; if the nitrite accumulation rate reaches more than 85 percent and the operation is stable for more than 7 days, the normal-temperature short-cut nitrification of the municipal sewage is successfully started; after stable operation for a period of time, reducing the treatment frequency of adding p-chloro-m-dimethylphenol to once for three days; if the effluent nitrite accumulation rate does not reach more than 85 percent, gradually shortening the treatment frequency according to the original treatment frequency once a day until the nitrite accumulation rate reaches more than 85 percent and the operation is stable for more than 7 days, and finally stopping the side flow treatment of the parachlorometaxylenol to maintain a stable short-cut nitrification process.
2. The method according to claim 1, characterized in that the sludge partial exchange, i.e. partial removal and recirculation operation steps are performed periodically:
performing a side stream treatment of activated sludge on the p-chloro-m-dimethylphenol by using a p-chloro-m-dimethylphenol sludge treatment device (18); 15min before the aeration stage of the short-distance urban sewage nitrification device (9) is finished, 1/2-1/4 activated sludge flows into the intermediate water tank (10) through the first sludge valve (8); then the activated sludge in the p-chloro-m-dimethylphenol sludge treatment device (18) enters the municipal sewage short-cut nitrification device (9) through a third sludge valve (13) and a second reflux pump (14); finally, the activated sludge in the intermediate water tank (10) enters a p-chloro-m-dimethylphenol sludge treatment device (18) through a first reflux pump (11) and a second sludge valve (12) so as to complete the sludge reflux operation;
enhancing shortcut nitrification by side flow inhibition treatment:
after the municipal sewage short-cut nitrification device (9) and the p-chloro-m-dimethylphenol sludge treatment device (18) exchange sludge through a sludge reflux device, setting a timer according to the pretreatment time of a side stream inhibitor to control the switch of a stirrer (16), and adding 60-70 mg/L of p-chloro-m-dimethylphenol into the p-chloro-m-dimethylphenol sludge treatment device (18) through a dosing pump (17); the pretreatment time of the lateral flow inhibitor is 15 to 20 hours from the addition of the p-chloro-m-dimethylphenol to the exchange.
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| CN115893648A (en) * | 2022-10-19 | 2023-04-04 | 北京城市排水集团有限责任公司 | Municipal sewage short-cut nitrification treatment system and method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531175A (en) * | 2012-03-08 | 2012-07-04 | 北京工业大学 | Phenol inhibition-coupled low temperature short-cut denitrification method |
| CN104817178A (en) * | 2015-05-17 | 2015-08-05 | 北京工业大学 | Short-range denitrification/dephosphorization device and method based on sludge side pretreatment |
| CN105692874A (en) * | 2016-01-21 | 2016-06-22 | 杭州师范大学 | Method for rapidly starting half-short-cut nitrification technology |
| WO2018136350A1 (en) * | 2017-01-18 | 2018-07-26 | Veolia Water Solutions & Technologies Support | Mainstream deammonification process for treating wastewater that suppresses the growth of nitrite oxidizing bacteria |
| KR101875024B1 (en) * | 2017-12-14 | 2018-08-02 | 경기도 | Apparatus and Method for Parial Nitrification of Ammonia from Ammonia Containing Sewage and Wastewater |
| CN109368770A (en) * | 2018-10-25 | 2019-02-22 | 清华大学 | A kind of the sewerage short-cut nitration method and device ultrasound-enhanced based on effluent |
| CN110002594A (en) * | 2019-05-10 | 2019-07-12 | 北京工业大学 | A kind of device and method that short distance nitration-anaerobic ammoxidation is realized based on azanol bystander suppression |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3788601B2 (en) * | 2002-01-25 | 2006-06-21 | 株式会社日立プラントテクノロジー | Nitrite-type nitrification carrier, production method thereof, and nitrogen removal method and apparatus using the same |
-
2019
- 2019-11-21 CN CN201911150566.1A patent/CN110759467B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102531175A (en) * | 2012-03-08 | 2012-07-04 | 北京工业大学 | Phenol inhibition-coupled low temperature short-cut denitrification method |
| CN104817178A (en) * | 2015-05-17 | 2015-08-05 | 北京工业大学 | Short-range denitrification/dephosphorization device and method based on sludge side pretreatment |
| CN105692874A (en) * | 2016-01-21 | 2016-06-22 | 杭州师范大学 | Method for rapidly starting half-short-cut nitrification technology |
| WO2018136350A1 (en) * | 2017-01-18 | 2018-07-26 | Veolia Water Solutions & Technologies Support | Mainstream deammonification process for treating wastewater that suppresses the growth of nitrite oxidizing bacteria |
| KR101875024B1 (en) * | 2017-12-14 | 2018-08-02 | 경기도 | Apparatus and Method for Parial Nitrification of Ammonia from Ammonia Containing Sewage and Wastewater |
| CN109368770A (en) * | 2018-10-25 | 2019-02-22 | 清华大学 | A kind of the sewerage short-cut nitration method and device ultrasound-enhanced based on effluent |
| CN110002594A (en) * | 2019-05-10 | 2019-07-12 | 北京工业大学 | A kind of device and method that short distance nitration-anaerobic ammoxidation is realized based on azanol bystander suppression |
Non-Patent Citations (1)
| Title |
|---|
| Removal of Chloroxylenol Disinfectant by an Activated Sludge Microbial Community;Choi Donggeon等;《Microbes and Environments》;20190627;第34卷(第2期);第129-135页 * |
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