CN111333188A - Tide-composite flow biological filter for stably realizing anaerobic ammonia oxidation denitrification of domestic sewage - Google Patents
Tide-composite flow biological filter for stably realizing anaerobic ammonia oxidation denitrification of domestic sewage Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/301—Aerobic and anaerobic treatment in the same reactor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
Abstract
The invention discloses a tide-composite flow biofilter for stably realizing anaerobic ammonia oxidation and denitrification of domestic sewage. The biological filter comprises a water inlet side and a water outlet side which are communicated with each other at the bottom, and the water inlet side is sequentially provided with a water dispersing layer, a first tide layer, a first saturated flooded layer and a first water collecting-dispersing layer from top to bottom; the drainage side is sequentially provided with a second tide layer, a drainage layer, a second saturated flooding layer, a second water collecting-dispersing layer, a water dispersing pipe, a water collecting-dispersing pipe, a drainage pipe, a backwashing air inlet pipe, a backwashing sludge discharge pipe, a backwashing fan and the like from top to bottom. The biological filter tank is operated in an intermittent mode, and the upper tidal layer is periodically submerged and dried to form an anoxic-aerobic alternative environment; the lower saturated flooded layer is in flooded state for a long time and is an anoxic functional area. The invention has simple structure, no energy consumption for oxygen supply, easy regulation and control and is suitable for deep denitrification of domestic sewage with different carbon-nitrogen ratios.
Description
Technical Field
The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a tide-composite flow biofilter for stably realizing anaerobic ammonia oxidation and denitrification of domestic sewage.
Background
In the sixties of the twentieth century, the unexplained loss of ammonium under hypoxic conditions has attracted attention when studying the nitrogen balance of the hypoxic fjord. However, until thirty years later, scientists first discovered ammonia oxidizing phenomena in sewage treatment systems under anoxic conditions and identified anammox bacteria from laboratory enriched cultures. Anammox refers to a process in which anammox bacteria oxidize ammonium to nitrogen using nitrite as an electron acceptor under anoxic conditions, and the process is autotrophic and utilizes CO2As the sole carbon source. Therefore, the anaerobic ammonia oxidation has the advantages of energy consumption saving, carbon source saving, small sludge production and the like. According to the anaerobic ammonia oxidation reaction process, the required substrates are mainly ammonia nitrogen, nitrite nitrogen and inorganic carbon. The contents of ammonia nitrogen and inorganic carbon in the domestic sewage are high, and the content of nitrite nitrogen is almost zero, so that the stable supply of nitrite nitrogen is of great importance for the application of anaerobic ammonia oxidation.
When high-concentration ammonia nitrogen wastewater is treated, partial nitrification is generally realized through free ammonia inhibition, so that nitrite nitrogen is stably provided for anaerobic ammonia oxidation; however, in the treatment of domestic sewage, the concentration of free ammonia is insufficient to inhibit nitrite-oxidizing bacteria, and thus it is difficult to achieve short-cut nitrification by inhibition of free ammonia. In addition, short-cut nitrification can also be achieved by regulating Dissolved Oxygen (DO) in the nitrification unit wastewater, e.g., controlling the system DO to be maintained at <0.5 mg/L. But the DO regulation and control has high requirements on a control system and the system is complex to maintain; moreover, it is difficult to adjust DO in wastewater in non-flooded aerated systems. Therefore, the anaerobic ammonia oxidation route based on the short-cut nitrification is difficult to be applied to the actual treatment engineering of the domestic sewage.
It has been shown that nitrite nitrogen (i.e. NO) can also be supplied stably by short-cut denitrification3 -Reduction controlled at NO2 -Stage), the process is mainly influenced by the carbon-nitrogen ratio (2-3) of inlet water, and the regulation and control are relatively simple. Moreover, because both denitrifying bacteria and anammox bacteria require an anoxic environment, they can coexist in harmony under anoxic conditions. More importantly, previous studies have shown that anammox bacteria have an advantage over denitrifying bacteria in competing for nitrite nitrogen under anoxic conditions in the presence of ammonia nitrogen, thereby facilitating the formation of a coupling of short-range denitrification (PDN) and Anammox (AMX). However, the existing PDN/AMX coupled systems are anoxic systems, and the influent water is usually a mixed water of ammonia nitrogen and nitrate nitrogen, which is difficult to treat domestic sewage alone, and must be used in combination with other aerobic units, which increases the complexity of the system. If the coupling of nitrification, PDN/AMX and denitrification can be realized in a single system under the condition of no need of power oxygen supply, the system has low operating cost and simple and convenient management and maintenance, and can realize deep denitrification of domestic sewage with different carbon-nitrogen ratios.
Disclosure of Invention
Aiming at the problems of oxygen supply energy consumption, difficulty in realizing anaerobic ammonia oxidation denitrification with low cost and the like of the current domestic sewage treatment process, the invention aims to provide the tide-composite flow biofilter for stably realizing the anaerobic ammonia oxidation denitrification of the domestic sewage, which can couple nitrification, PDN/AMX and traditional denitrification so as to realize the deep denitrification of a system, and has the advantages of simple reactor structure, no energy consumption of oxygen supply and easiness in regulation and control.
The purpose of the invention is realized by the following technical scheme:
a tide-combined flow biofilter for stably realizing anaerobic ammonia oxidation denitrification of domestic sewage comprises a water inlet side unit and a water outlet side unit which are communicated with each other at the bottom, and is provided with a water dispersing layer, a first tide layer, a first saturated flooding layer, a first water collecting-dispersing layer, a second saturated flooding layer, a water outlet layer, a second tide layer, a water dispersing pipe, a water collecting-dispersing pipe, a water outlet pipe, a back washing air inlet pipe, a back washing sludge discharge pipe and a back washing fan; the water inlet side and the water discharge side are communicated with the bottom through a water collecting-dispersing pipe;
the water inlet side is sequentially provided with a water dispersion layer, a first tide layer, a first saturated flooded layer and a first water collection-water dispersion layer from top to bottom; the drainage side is sequentially provided with a second tide layer, a drainage layer, a second saturated flooding layer and a second water collecting-dispersing layer from top to bottom;
the water dispersion pipe is laid in the water dispersion layer, the other end of the water dispersion pipe is connected with the domestic sewage pool, and the domestic sewage is pumped into the biological filter pool by a pump when the system works; the water collecting-dispersing pipes are laid in the first water collecting-dispersing layer and the second water collecting-dispersing layer; the drain pipe is laid in the drain layer; the backwashing air inlet pipe is vertically arranged in the drainage side filler, and two ends of the backwashing air inlet pipe are respectively connected with the backwashing fan and the water collecting-dispersing pipe; the back-flushing sludge discharge pipe is arranged on the wall of the biological filter tank higher than the filler;
the drain pipe is provided with an electric or electromagnetic valve control system for timing drainage; the backwashing air inlet pipe and the backwashing sludge discharge pipe are respectively provided with a ball valve and are opened only when the system is backwashed; the water collecting-dispersing pipe is used as a back-washing air distributing pipe during the back washing of the system.
Preferably, the first tidal layer and the second tidal layer are respectively composed of one or more than two of 0.2-1.5 cm of broken stone, zeolite, steel slag and limestone, and the thickness of the first tidal layer and the second tidal layer is 15-100 cm; the first saturated flooding layer and the second saturated flooding layer are respectively composed of one or more than two of 0.2-1.5 cm of broken stone, zeolite, steel slag and limestone, and the thickness of the first saturated flooding layer and the second saturated flooding layer is 30-200 cm; the water-dispersing layer, the first water-collecting and water-dispersing layer and the second water-collecting and water-dispersing layer are all composed of crushed stones with the particle size of 2-5 cm, and the thicknesses of the crushed stones are 5-30 cm; the drainage layer is composed of crushed stone and/or zeolite with the particle size of 1-5 cm, and the thickness of the drainage layer is 5-30 cm.
When the biological filter tank is used for treating domestic sewage, sewage enters the system from a water inlet side water dispersing layer, and the sewage at the water inlet side is driven to continuously flow to a water discharge side through a water collecting-dispersing pipe by the liquid level difference between the water inlet side and the water discharge side; when water enters, the electric or electromagnetic valve on the drain pipe is in a closed state, the water level of the second tidal layer is continuously raised until the tidal layer is submerged, and at the moment, the system stops water entering; after the first tidal layer and the second tidal layer are kept submerged for a period of time, the electric or electromagnetic valve is opened, the system starts to drain water, fresh air is sucked into the first tidal layer and the second tidal layer to reoxygenate the system, after the water drainage is finished, the electric or electromagnetic valve is closed, after the dry state is kept for a period of time, the system starts to intake water, and the next operation period is started. When the system runs for a certain time and the permeation rate becomes slow and shows the sign of blockage, the biological filter tank can be backwashed by the backwashing fan so as to recover the permeation performance.
The tidal-composite flow biofilter for stably realizing anaerobic ammonia oxidation and denitrification of domestic sewage has the following operating parameters: the water inlet time of the system is 1-60 min, the flooding time of the tidal bed is 10-120 min, the drainage time of the system is 5-30 min, and the drying time of the tidal bed is 60-120 min.
The principle of the invention for realizing the coupling of nitrification, PDN/AMX and traditional denitrification is as follows:
the tide-composite flow biological filter comprises two functional areas, namely a tide layer and a saturated flooded layer, wherein the tide layer is an anoxic and aerobic alternate functional area, and can generate denitrification under an anoxic environment during flooding; when the filler falls dry, the filler is in an aerobic environment, and fresh air sucked into the filler by using drainage is used for aerobic nitrification; because the saturated flooding layer is always in a flooding state and is an anoxic functional area, PDN/AMX and denitrification can occur, and the key for successfully establishing the PDN/AMX layer is to stably obtain a proper substrate (ammonia nitrogen, nitrate nitrogen and a proper carbon-nitrogen ratio), which needs the combined action of tide and composite flow to realize.
The water inlet of the tide-composite flow biofilter can be divided into two parts, one part directly flows through the first tide layer and enters the first saturated flooding layer below the first tide layer, so that the sewage originally in the first tide layer is driven to flow to the drainage side and finally the second tide layer is flooded; the other part stays in the first tidal layer and is fully contacted with the layer of filling materials, most of ammonia nitrogen contained in the tidal layer is absorbed by the filling materials of the layer, and the tidal layer is converted into nitrate nitrogen through aerobic nitrification after the system is dried. The contact time of the former part of domestic sewage and the first tidal layer filler is short, the amount of adsorbed ammonia nitrogen is small, most of the contained ammonia nitrogen enters the first saturated flooded layer along with the former part of domestic sewage, and simultaneously, the part of domestic sewage can elute nitrate nitrogen generated by nitrification of the first tidal layer when the sewage falls dry in the previous period and brings the nitrate nitrogen into the saturated flooded layer. Therefore, the domestic sewage entering the first saturated flooded layer has the following characteristics: contains ammonia nitrogen and COD carried by the domestic sewage and nitrate nitrogen eluted from the first tidal layer. This can provide suitable substrate for PDN/AMX, and make the tide-composite flow biological filter realize stable anaerobic ammonia oxidation. In addition, the saturated flooded layer can also undergo denitrification. Compared with the water inlet side, the pollutant load of the water outlet side is lower, the contribution to denitrification is lower, and the pollutant load plays a corresponding role in reaching the standard of the outlet water.
From the aspect of an oxygen supply mode, the tide-composite flow biofilter mainly depends on suction force generated during drainage to suck fresh air into a tide layer to supply oxygen for a system. Theoretically, each discharge is 1m3Water can be sucked into the space of 1m3Air, and 1m3The air contains about 300g of oxygen and can remove 1m3Oxygen required by ammonia nitrogen in domestic sewage.
The tide-composite flow biofilter for stably realizing the anaerobic ammonia oxidation denitrification of the domestic sewage has the following advantages:
(1) the tide-composite flow biofilter forms an environment with aerobic main in an upper tide layer and anoxic lower saturated flooded layer, and is assisted with a composite flow mode, so that part of ammonia nitrogen can be converted into nitrate nitrogen in the first tide layer, enters the first saturated flooded layer together with the rest ammonia nitrogen, and is subjected to PDN/AMX denitrification in an anoxic environment; therefore, compared with an anoxic PDN/AMX reactor based on an activated sludge process, the invention can generate nitrification, has the capability of directly treating domestic sewage, and greatly improves the application range.
(2) Because the upper tidal layer has an aerobic function, the removal efficiency of the tidal layer on COD can be regulated and controlled by a technical means, so that the influence of carbon nitrogen ratio on PDN/AMX is overcome, and the PDN/AMX can be realized when domestic sewage with different carbon nitrogen ratios is treated.
(3) Although the invention carries out full-range nitrification, the oxygen supply does not need energy consumption, thus being more energy-saving than the short-range nitrification-anaerobic ammonia oxidation full-range autotrophic nitrogen removal process based on the activated sludge method.
(4) The device is simple, does not need to monitor and regulate water quality parameters (DO and the like) in the system in real time, and is convenient to manage and maintain.
Drawings
FIG. 1 is a schematic structural diagram of a tide-composite flow biofilter system for stably realizing anaerobic ammonia oxidation and denitrification of domestic sewage.
In fig. 1: the device comprises a domestic sewage tank 1, a biological filter tank 2, a water inlet pump 3, a water dispersion layer 4, a first tide layer 5, a first saturated flooded layer 6, a first water collecting-dispersing layer 7, a second water collecting-dispersing layer 8, a second saturated flooded layer 9, a water drainage layer 10, a second tide layer 11, a water dispersion pipe 12, a water collecting-dispersing pipe 13, a water drainage pipe 14, an electric or electromagnetic valve 15, a back-flushing mud drainage pipe 16, a ball valve 17, a back-flushing air inlet pipe 18, a back-flushing fan 19, a water inlet side I and a water drainage side II.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the embodiments of the present invention are not limited thereto.
The invention provides a tide-composite flow biological filter system for stably realizing anaerobic ammonia oxidation and denitrification of domestic sewage, which comprises a domestic sewage tank 1 and a biological filter tank 2 as shown in figure 1, wherein:
the domestic sewage tank 1 is connected with the biological filter tank 2 through a water inlet pump 3 and a water dispersion pipe 12;
the biological filter 2 comprises a water inlet side I unit and a water outlet side II unit which are communicated with each other at the bottom, and is provided with a water dispersion layer 4, a first tide layer 5, a first saturated flooded layer 6, a first water collection-water dispersion layer 7, a second water collection-water dispersion layer 8, a second saturated flooded layer 9, a water outlet layer 10, a second tide layer 11, a water dispersion pipe 12, a water collection-water dispersion pipe 13, a water outlet pipe 14, a backwashing air inlet pipe 18, a backwashing sludge discharge pipe 16 and a backwashing fan 19; the water inlet side I and the water outlet side II are communicated with the bottom through a water collecting-dispersing pipe 13;
the water inlet side I is sequentially provided with a water dispersion layer 4, a first tide layer 5, a first saturated flooded layer 6 and a first water collection-dispersion layer 7 from top to bottom; the drainage side II is sequentially provided with a second tide layer 11, a drainage layer 10, a second saturated flooded layer 9 and a second water collecting-dispersing layer 8 from top to bottom;
the water dispersion pipe 12 is laid in the water dispersion layer 4, the other end of the water dispersion pipe is connected with the domestic sewage pool 1, and domestic sewage is pumped into the biological filter pool 2 through the water inlet pump 3 when the system works; the water collecting-dispersing pipes 13 are laid in the first water collecting-dispersing layer 7 and the second water collecting-dispersing layer 8; the drain pipe 14 is laid in the drain layer 10; the backwashing air inlet pipe 18 is vertically arranged in the drainage side II filler, and two ends of the backwashing air inlet pipe are respectively connected with a backwashing fan 19 and a water collecting-dispersing pipe 13; the back flushing sludge discharge pipe 16 is arranged on the wall of the biological filter 2 higher than the filler;
the drain pipe 14 is provided with an electric or electromagnetic valve 15 control system for timing drainage; the backwashing air inlet pipe 18 and the backwashing sludge discharge pipe 16 are respectively provided with a ball valve 17 and are opened only when the system is backwashed; the water collecting-distributing pipe 13 is used as a back-washing air distributing pipe during the back washing of the system.
The first tidal layer 5 and the second tidal layer 11 are respectively composed of one or more than two of 0.2-1.5 cm of broken stone, zeolite, steel slag and limestone, and the thickness of the first tidal layer and the second tidal layer is 15-100 cm; the first saturated flooding layer 6 and the second saturated flooding layer 9 are respectively composed of one or more than two of 0.2-1.5 cm of broken stone, zeolite, steel slag and limestone, and the thicknesses of the broken stone, the zeolite, the steel slag and the limestone are both 30-200 cm; the water-dispersing layer 4, the first water-collecting and water-dispersing layer 7 and the second water-collecting and water-dispersing layer 8 are all composed of crushed stones with the particle size of 2-5 cm, and the thickness of the crushed stones is 5-30 cm; the drainage layer 10 is composed of crushed stone and/or zeolite with the particle size of 1-5 cm, and the thickness of the drainage layer is 5-30 cm.
When the biological filter 2 is used for treating domestic sewage, sewage enters a system from a water dispersing pipe 12 arranged in a water dispersing layer 4 at a water inlet side I, and the sewage at the water inlet side I is driven to continuously flow to a water discharging side II through a water collecting-dispersing pipe 13 by the liquid level difference between the water inlet side I and the water discharging side II; because the electric or electromagnetic valve 15 on the drain pipe 14 is in a closed state when water enters, the water level of the second tidal layer 11 is continuously raised until the tidal layer is submerged, and at the moment, the system stops water entering; after the first tidal layer 5 and the second tidal layer 11 are kept submerged for a period of time, the electric or electromagnetic valve 15 is opened, the biological filter 2 starts to drain water, fresh air is sucked into the first tidal layer 5 and the second tidal layer 11 to reoxygenate the system, after the drainage is finished, the electric or electromagnetic valve 15 is closed, after the dry state is kept for a period of time, the system starts to enter water, and the next operation period is started. When the system runs for a certain time and the permeation rate becomes slow and shows the sign of blockage, the biological filter 2 can be backwashed by the backwashing fan 19 to recover the permeation performance.
The operating parameters of the biological filter 2 are as follows: the water inlet time of the system is 1-60 min, the flooding time of the tidal bed is 10-120 min, the drainage time of the system is 5-30 min, and the drying time of the tidal bed is 60-120 min.
Example 1
The embodiment treats domestic sewage with low carbon-nitrogen ratio, and the structure of the tide-composite flow biofilter for stably realizing anaerobic ammonia oxidation denitrification of the domestic sewage is shown in figure 1. In the embodiment, the area ratio of the water inlet side to the water discharge side is 1:1, the thicknesses of the first tidal layer 5 and the second tidal layer 11 are both 30cm, the tidal layers are formed by mixing crushed stone, zeolite and steel slag, and the particle size ranges from 0.2 cm to 1.0 cm. The thickness of the first saturated flooding layer 6 and the thickness of the second saturated flooding layer 9 are both 60cm, the first saturated flooding layer is composed of broken stones, zeolite and steel slag, and the particle size range is 0.2-1 cm. The water dispersing layer 4, the first water collecting-draining layer 7, the second water collecting-draining layer 8 and the draining layer 10 are all 5cm thick and are composed of crushed stones with the particle size range of 2-4 cm. The drain pipe 14 is provided with an electromagnetic valve 15 whose opening and closing are controlled by a time controller.
The operation parameters of the embodiment are as follows: the biological filter 2 operates for 8 periods every day, and each period is 3 hours; the second tidal layer 11 of packing is just submerged by each intake; the water inlet time of the system is 3min, the flooding time of the tidal zone is 87min, the water drainage time of the system is 7min, and the drying time of the tidal zone is 83 min.
During the experiment, the statistics of the inlet water quality is shown in table 1, and the inlet and outlet water quality and the pollutant removal rate are shown in table 2 (after the system is successfully started (membrane-forming culture is successful), samples are sampled and analyzed once a week under the operation parameters, and five samples are analyzed in total).
TABLE 1 feed water concentration ranges and averages of example 1
As can be seen from Table 1, the average ratio of COD/TN of the inlet water is only 2.52, and the inlet water belongs to domestic sewage with low carbon-nitrogen ratio. As can be seen from Table 2, in example 1, the removal rates of COD, ammonia nitrogen and total nitrogen are respectively 76.3% -93.5%, 84.9% -89.1% and 55.8% -68.5%, and the concentration of TN in the effluent is 11.2-16.1 mg/L, so that deep denitrification of the domestic sewage with low carbon-nitrogen ratio is realized.
TABLE 2 quality of inlet and outlet water and removal rate of pollutants in example 1
Note: the pH is dimensionless.
Example 2
The embodiment treats partially nitrified domestic sewage with low carbon-nitrogen ratio, and the structure of the tide-composite flow biofilter for stably realizing anaerobic ammonia oxidation denitrification of the domestic sewage is shown in figure 1. In the embodiment, the area ratio of the water inlet side to the water outlet side is 2:1, and the thicknesses of the first tidal layer 5 and the second tidal layer 11 are both 16cm, wherein the former is composed of crushed stone with the particle size range of 0.5-1.2 cm, and the latter is composed of zeolite with the particle size range of 0.2-0.4 cm. The thickness of the first saturated flooding layer 6 and the thickness of the second saturated flooding layer 9 are both 35cm, wherein the first saturated flooding layer is composed of crushed stones with the particle size range of 0.5-1.2 cm, and the second saturated flooding layer is composed of zeolite with the particle size range of 0.2-0.4 cm. The thickness of the water-dispersing layer 4, the thickness of the first water-collecting and water-dispersing layer 7 and the thickness of the second water-collecting and water-dispersing layer 8 are all 5cm, and the water-dispersing layer is composed of crushed stones with the particle size of 2-4 cm. The drainage layer 10 is 5cm thick and is composed of zeolite with a particle size of 0.2-0.4 cm. The drain pipe 14 is provided with an electromagnetic valve 15 whose opening and closing are controlled by a time controller.
The operation parameters of the embodiment are as follows: the biological filter 2 operates for 8 periods every day, and each period is 3 hours; the second tidal layer 11 of packing is just submerged by each intake; the water inlet time of the system is 20min, the flooding time of the tidal zone is 40min, the water drainage time of the system is 10min, and the drying time of the tidal zone is 110 min.
During the experiment, the statistics of the inlet water quality is shown in table 3, and the inlet and outlet water quality and the pollutant removal rate are shown in table 4 (after the system is successfully started (membrane-forming culture is successful), samples are sampled and analyzed once a week under the operation parameters, and five samples are analyzed in total).
TABLE 3 statistical table of influent water quality in example 2
TABLE 4 quality of inlet and outlet water and removal rate of pollutants in example 2
Note: the pH is dimensionless.
As can be seen from Table 3, the average ratio of COD/TN of the influent water is only 2.24, and the influent water belongs to domestic sewage with low carbon-nitrogen ratio. As can be seen from Table 4, in example 2, the removal rates for COD, ammonia nitrogen, nitrate nitrogen and total nitrogen are respectively 69.7% -72.4%, 84.5% -87.5%, 65.8% -85.7% and 75.5% -87.0%, and the concentration of TN in the effluent is 5.08-9.16 mg/L, so that deep denitrification for domestic sewage with low carbon-nitrogen ratio is realized.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (3)
1. A tide-combined flow biofilter for stably realizing anaerobic ammonia oxidation denitrification of domestic sewage is characterized by comprising a water inlet side unit and a water outlet side unit which are communicated with each other at the bottom, and a water dispersion layer, a first tide layer, a first saturated flooding layer, a first water collection-water dispersion layer, a second saturated flooding layer, a water outlet layer, a second tide layer, a water dispersion pipe, a water collection-water dispersion pipe, a water outlet pipe, a back washing air inlet pipe, a back washing sludge discharge pipe and a back washing fan; the water inlet side and the water discharge side are communicated with the bottom through a water collecting-dispersing pipe;
the water inlet side is sequentially provided with a water dispersion layer, a first tide layer, a first saturated flooded layer and a first water collection-water dispersion layer from top to bottom; the drainage side is sequentially provided with a second tide layer, a drainage layer, a second saturated flooding layer and a second water collecting-dispersing layer from top to bottom;
the water dispersing pipe is laid in the water dispersing layer; the water collecting-dispersing pipes are laid in the first water collecting-dispersing layer and the second water collecting-dispersing layer; the drain pipe is laid in the drain layer; the backwashing air inlet pipe is vertically arranged in the drainage side filler, and two ends of the backwashing air inlet pipe are respectively connected with the backwashing fan and the water collecting-dispersing pipe; the back-flushing sludge discharge pipe is arranged on the wall of the biological filter tank higher than the filler;
the drain pipe is provided with an electric or electromagnetic valve control system for timing drainage; the backwashing air inlet pipe and the backwashing sludge discharge pipe are respectively provided with a ball valve.
2. The tide-composite flow biofilter capable of stably realizing anaerobic ammonia oxidation denitrification of domestic sewage according to claim 1, wherein the first tide layer and the second tide layer are respectively composed of one or more than two of 0.2-1.5 cm of crushed stone, zeolite, steel slag and limestone, and the thickness of each tide layer is 15-100 cm; the first saturated flooding layer and the second saturated flooding layer are respectively composed of one or more than two of 0.2-1.5 cm of broken stone, zeolite, steel slag and limestone, and the thickness of the first saturated flooding layer and the second saturated flooding layer is 30-200 cm; the water-dispersing layer, the first water-collecting and water-dispersing layer and the second water-collecting and water-dispersing layer are all composed of crushed stones with the particle size of 2-5 cm, and the thicknesses of the crushed stones are 5-30 cm; the drainage layer is composed of crushed stone and/or zeolite with the particle size of 1-5 cm, and the thickness of the drainage layer is 5-30 cm.
3. The tidal-composite flow biofilter for stably realizing anaerobic ammonia oxidation and denitrification of domestic sewage according to claim 1 or 2, characterized in that the system operation steps and parameters are as follows:
when the system is flooded, the electromagnetic or electric valve is closed, the water level of the first tidal layer and the water level of the second tidal layer are continuously raised and finally submerged; after the submergence state is kept for a certain time, the electromagnetic or electric valve is opened, the system starts to drain water, the water levels of the first tidal layer and the second tidal layer are continuously reduced until the tidal layers are completely drained, and the electromagnetic or electric valve is closed; after keeping the dry state for a certain time, starting water inlet of the next period;
the water inlet time of the system is 1-60 min, the flooding time of the tidal bed is 10-120 min, the drainage time of the system is 5-30 min, and the drying time of the tidal bed is 60-120 min.
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| CN112408705A (en) * | 2020-11-12 | 2021-02-26 | 江西挺进环保科技有限公司 | Domestic sewage treatment system with tidal flow percolation system and treatment process |
| CN113321304A (en) * | 2021-06-21 | 2021-08-31 | 陕西科技大学 | Tidal flow biological filter device and wastewater purification method |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060124540A1 (en) * | 2001-11-14 | 2006-06-15 | Austin David C | Integrated hydroponic and wetland wastewater treatment systems and associated methods |
| CN102249495A (en) * | 2011-06-24 | 2011-11-23 | 浙江大学 | Device for carrying out ecological treatment on sewage with low carbon nitrogen ratio |
| CN104291443A (en) * | 2014-10-12 | 2015-01-21 | 北京工业大学 | Device and method for treating low-carbon-nitrogen-ratio urban sewage by virtue of half nitrification/partial denitrification/anaerobic ammonium oxidation |
| CN104355404A (en) * | 2014-10-27 | 2015-02-18 | 北京工业大学 | Method and device for rapidly realizing anaerobic ammonia oxidation of bacteria filter |
| CN105198084A (en) * | 2015-10-25 | 2015-12-30 | 北京工业大学 | Device and method of realizing advanced nitrogen removal through preceding partial denitrification coupling ammoxidation DEAMOX technology |
| ES2562379A1 (en) * | 2015-10-23 | 2016-03-03 | Valoriza Agua S.L | Method and system for the autotrophic elimination of nitrogen in wastewater by biofiltration in a fixed bed (Machine-translation by Google Translate, not legally binding) |
| CN105540841A (en) * | 2015-12-15 | 2016-05-04 | 华东师范大学 | Method and equipment for aerobic/anaerobic biofilter biological denitrogenation |
| CN105540832A (en) * | 2015-12-14 | 2016-05-04 | 安徽国祯环保节能科技股份有限公司 | Device and method for achieving autotrophic nitrogen removal of low-carbon/nitrogen-ratio sewage based on partial denitrification and anaerobic ammonia oxidation |
| CN107162193A (en) * | 2017-06-23 | 2017-09-15 | 北京工业大学 | Hypoxemia nitrification coupling short-cut denitrification Anammox handles the device and method of sanitary sewage |
| CN109384315A (en) * | 2018-10-26 | 2019-02-26 | 中国科学院广州地球化学研究所 | A kind of intensified denitrification and dephosphorization high-load artificial wetland system |
| CN110104774A (en) * | 2019-05-21 | 2019-08-09 | 北京工业大学 | Continuous flow segmental influent, sludge and fermented sludge segment reflux part denitrification/Anammox Treating Municipal Sewage device |
| CN209367942U (en) * | 2018-12-10 | 2019-09-10 | 云南大学 | A kind of bacteria filter device of high-efficient purification sewage |
| CN110577284A (en) * | 2019-10-12 | 2019-12-17 | 伏小勇 | Sequencing batch type carbon neutralization tide biological contact oxidation reactor |
-
2020
- 2020-03-27 CN CN202010227748.0A patent/CN111333188B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060124540A1 (en) * | 2001-11-14 | 2006-06-15 | Austin David C | Integrated hydroponic and wetland wastewater treatment systems and associated methods |
| CN102249495A (en) * | 2011-06-24 | 2011-11-23 | 浙江大学 | Device for carrying out ecological treatment on sewage with low carbon nitrogen ratio |
| CN104291443A (en) * | 2014-10-12 | 2015-01-21 | 北京工业大学 | Device and method for treating low-carbon-nitrogen-ratio urban sewage by virtue of half nitrification/partial denitrification/anaerobic ammonium oxidation |
| CN104355404A (en) * | 2014-10-27 | 2015-02-18 | 北京工业大学 | Method and device for rapidly realizing anaerobic ammonia oxidation of bacteria filter |
| ES2562379A1 (en) * | 2015-10-23 | 2016-03-03 | Valoriza Agua S.L | Method and system for the autotrophic elimination of nitrogen in wastewater by biofiltration in a fixed bed (Machine-translation by Google Translate, not legally binding) |
| CN105198084A (en) * | 2015-10-25 | 2015-12-30 | 北京工业大学 | Device and method of realizing advanced nitrogen removal through preceding partial denitrification coupling ammoxidation DEAMOX technology |
| CN105540832A (en) * | 2015-12-14 | 2016-05-04 | 安徽国祯环保节能科技股份有限公司 | Device and method for achieving autotrophic nitrogen removal of low-carbon/nitrogen-ratio sewage based on partial denitrification and anaerobic ammonia oxidation |
| CN105540841A (en) * | 2015-12-15 | 2016-05-04 | 华东师范大学 | Method and equipment for aerobic/anaerobic biofilter biological denitrogenation |
| CN107162193A (en) * | 2017-06-23 | 2017-09-15 | 北京工业大学 | Hypoxemia nitrification coupling short-cut denitrification Anammox handles the device and method of sanitary sewage |
| CN109384315A (en) * | 2018-10-26 | 2019-02-26 | 中国科学院广州地球化学研究所 | A kind of intensified denitrification and dephosphorization high-load artificial wetland system |
| CN209367942U (en) * | 2018-12-10 | 2019-09-10 | 云南大学 | A kind of bacteria filter device of high-efficient purification sewage |
| CN110104774A (en) * | 2019-05-21 | 2019-08-09 | 北京工业大学 | Continuous flow segmental influent, sludge and fermented sludge segment reflux part denitrification/Anammox Treating Municipal Sewage device |
| CN110577284A (en) * | 2019-10-12 | 2019-12-17 | 伏小勇 | Sequencing batch type carbon neutralization tide biological contact oxidation reactor |
Non-Patent Citations (1)
| Title |
|---|
| WANG ZHEN等: "Enhancing nitrogen removal via the complete autotrophic nitrogen removal over nitrite process in a modified single-stage tidal flow constructed wetland", 《ECOLOGICAL ENGINEERING》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408705A (en) * | 2020-11-12 | 2021-02-26 | 江西挺进环保科技有限公司 | Domestic sewage treatment system with tidal flow percolation system and treatment process |
| CN112408705B (en) * | 2020-11-12 | 2022-04-29 | 江西挺进环保科技股份有限公司 | Domestic sewage treatment system with tidal flow percolation system and treatment process |
| CN113321304A (en) * | 2021-06-21 | 2021-08-31 | 陕西科技大学 | Tidal flow biological filter device and wastewater purification method |
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