CN107055933B - High-ammonia-nitrogen low-carbon/nitrogen-ratio domestic sewage treatment system and method - Google Patents

High-ammonia-nitrogen low-carbon/nitrogen-ratio domestic sewage treatment system and method Download PDF

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CN107055933B
CN107055933B CN201611192795.6A CN201611192795A CN107055933B CN 107055933 B CN107055933 B CN 107055933B CN 201611192795 A CN201611192795 A CN 201611192795A CN 107055933 B CN107055933 B CN 107055933B
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CN107055933A (en
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李德生
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Beijing Jiaotong University
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    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • 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
    • C02F2101/105—Phosphorus compounds
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/14—NH3-N
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • 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
    • C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
    • 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
    • C02F3/308—Biological phosphorus removal

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  • Chemical & Material Sciences (AREA)
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Abstract

A system and a method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio belong to the technical field of sewage treatment. Removing larger floating objects and grease in the sewage by using an oil removing grating; setting a circulation folded plate adjusting pool to adjust water quality and water quantity; setting a circulation folded plate anaerobic tank to hydrolyze and denitrify organic matters; a secondary baffling double-circulation aerobic tank is arranged in series to realize synchronous denitrification of the granular sludge; arranging a high-efficiency rotational flow sedimentation tank, and refluxing partial granular sludge to a circular flow folded plate anaerobic tank and a secondary baffling dual-circulation aerobic tank; a chemical catalytic micro-aeration biological filter (CCBF) is arranged, and nitrate nitrogen and phosphorus in water are removed by using a chemical catalytic biological carrier, so that the total nitrogen and the total phosphorus in the effluent reach the requirement of regenerated reuse water. Various indexes of the effluent of the invention reach or are superior to the requirements of GB/T18921-2002 and GB/T18920-2002 for recycling the urban miscellaneous water quality.

Description

High-ammonia-nitrogen low-carbon/nitrogen-ratio domestic sewage treatment system and method
Technical Field
The invention relates to a system and a method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio, belonging to the technical field of sewage treatment.
Background
The domestic sewage of expressway service area, railway station and partial domestic sewage features high content of ammonia nitrogen and relatively low content of organic matter, and belongs to sewage with low carbon-nitrogen ratio. When the traditional A/O biological denitrification process is adopted for treatment, enough nitrifying bacteria are needed for keeping good nitrification effect, and the longer sludge age is an effective method for maintaining the growth of the nitrifying bacteria, so that the volume of the structure is correspondingly increased; in addition, the nitrifying bacteria are often carried out by the effluent of the secondary sedimentation tank, so that the nitrification is reduced; meanwhile, because of the shortage of carbon source, the denitrification efficiency is low, and the total nitrogen removal is limited. The Membrane Bioreactor (MBR) has the advantages of high volume load, small occupied area, low residual sludge yield, good effluent quality and the like, and is still influenced by a carbon source, the denitrification efficiency is low, the total nitrogen of effluent can not meet the discharge requirement, and meanwhile, the popularization and application of the MBR are also limited by the problems of water yield reduction, complex membrane filtration operation and the like caused by membrane pollution.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a system and a method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio.
A method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio comprises the following steps;
removing larger floating objects and grease in the effluent of the septic tank by using an oil removing grating; setting a circulation folded plate regulating tank to regulate the quality and quantity of sewage; arranging a circular flow folded plate anaerobic tank, fully hydrolyzing macromolecular organic matters in the sewage, and performing denitrification; the secondary baffling dual-circulation aerobic tanks are arranged in series, so that the synchronous nitrification and denitrification of the aerobic granular activated sludge are enhanced and assisted, and the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage is increased; arranging a high-efficiency rotational flow sedimentation tank for separating mud and water, and refluxing part of granular activated sludge to a circular flow folded plate anaerobic tank and a secondary baffling dual-circulation aerobic tank to realize effective recovery of the granular activated sludge; a chemical catalytic micro-aeration biological filter (CCBF) is arranged, pollutants such as nitrate nitrogen, phosphorus and the like in water are further removed by utilizing a carbon-free special-effect chemical catalytic biological carrier (the chemical catalytic biological carrier is an aerobic low carbon nitrogen ratio sewage ammonia nitrogen direct denitrification biological particle carrier and a preparation method thereof (the patent number ZL201310093411.5) which are issued by the applicant on the year 2014, month 07 and 23) and the aerobic low carbon nitrogen ratio sewage ammonia nitrogen direct denitrification biological particle carrier is prepared, so that the total nitrogen and the total phosphorus in the wastewater meet the requirement of regeneration reuse water; the high-efficiency fiber filtering device is arranged, so that trace suspended matters in the CCBF effluent can be quickly filtered; sludge generated by the high-efficiency rotational flow sedimentation tank, the CCBF and the high-efficiency fiber filtering device enters a septic tank, and the sludge is transported outside or dehydrated on site by a dung suction truck; finally, the treated water enters a reclaimed water storage pool and is disinfected to realize recycling.
A high ammonia nitrogen low carbon/nitrogen ratio domestic sewage treatment system, the high ammonia nitrogen low carbon/nitrogen ratio domestic sewage through the septic tank enters the deoiling grid; the device comprises an oil removing grid, a circulation folded plate regulating tank, a circulation folded plate anaerobic tank, a second-stage serial baffling dual-circulation aerobic tank, a high-efficiency rotational flow sedimentation tank, a CCBF, a circulation folded plate anaerobic tank, a second-stage baffling dual-circulation aerobic tank and a septic tank, wherein the circulation folded plate regulating tank is connected behind the flow folded plate regulating tank, the second-stage serial baffling dual-circulation aerobic tank is connected behind the baffling dual-circulation aerobic tank, the high-efficiency rotational flow sedimentation tank is respectively connected with the CCBF, the circulation folded plate anaerobic tank, the second-stage baffling dual-circulation aerobic tank and the septic tank, the CCBF is respectively connected with a high-efficiency fiber filtering device and the septic tank, the high-efficiency fiber filtering device is respectively connected with a reclaimed water.
A high ammonia nitrogen low carbon/nitrogen ratio domestic sewage treatment system, deoiling grating is used for removing larger floater and grease in the effluent of septic tank;
the circulation folded plate adjusting tank is used for adjusting the water quality and the water quantity of the sewage;
the circulation folded plate anaerobic tank is used for biologically hydrolyzing macromolecular organic matters in the sewage and performing denitrification;
the secondary baffling dual-circulation aerobic tanks are connected in series and used for enhancing the synchronous nitrification and denitrification of the auxiliary aerobic granular activated sludge and increasing the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage;
the high-efficiency rotational flow sedimentation tank is used for quickly separating mud and water, and part of granular activated sludge flows back to the circular flow folded plate anaerobic tank and the secondary baffling dual-circulation aerobic tank, so that the effective recovery of the granular activated sludge is realized;
the CCBF is used for further removing pollutants such as nitrate nitrogen, phosphorus and the like in the water, so that the total nitrogen and the total phosphorus in the wastewater meet the requirements of regeneration reuse water;
the high-efficiency fiber filtering device is used for quickly filtering trace suspended matters in the CCBF effluent;
the reclaimed water storage pool is used for storing reuse water for flushing toilets, greening, landscapes and the like;
the disinfection facility is used for the inactivation treatment of bacteria in the reuse water.
The invention has the advantages that: the sewage stays in the circular folded plate anaerobic tank for 6 hours, macromolecular organic matters in the sewage can be hydrolyzed and denitrified, the total nitrogen can be removed by 70 percent, and the COD is removed by 60 percent; the two-stage serial baffling dual-circulation aerobic tank has hydraulic retention time of 6h and 4h respectively, can be used for enhancing synchronous nitrification and denitrification of the auxiliary aerobic granular activated sludge, and increasing the efficiency of removing high ammonia nitrogen and soluble organic matters in sewage, so that more than 90% of the soluble organic matters in effluent are removed, more than 95% of the ammonia nitrogen is removed, 60% of total nitrogen is removed, and more than 80% of the total phosphorus is removed; sewage enters a chemical catalytic micro-aeration biological filter (CCBF) through a high-efficiency rotational flow sedimentation tank, and is retained for 8 hours in a hydraulic power mode, pollutants such as nitrate nitrogen, phosphorus and the like in the water are further removed by utilizing a carbon-free special-effect chemical catalytic biological carrier (the chemical catalytic biological carrier is an aerobic low-carbon-nitrogen-ratio sewage ammonia nitrogen direct denitrification biological particle carrier prepared by an invention patent entitled by the applicant of 2014, 07, 23 and the aerobic low-carbon-nitrogen-ratio sewage ammonia nitrogen direct denitrification biological particle carrier and a preparation method (the patent No. ZL201310093411.5), so that the total nitrogen and the total phosphorus in the wastewater meet the requirement of regeneration reuse water, the dissolved organic matters in the effluent are removed by more than 90%, the ammonia nitrogen is removed by more than 95%, the total nitrogen is removed by more than 85%, and the total phosphorus removal rate is; various indexes of the effluent treated by the system reach or are superior to the requirements of 'quality of water for recycling landscape environment for urban sewage' GB/T18921-2002 and 'quality of water for recycling urban miscellaneous water' GB/T18920-.
Drawings
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein the accompanying drawings are included to provide a further understanding of the invention and form a part of this specification, and wherein the illustrated embodiments of the invention and the description thereof are intended to illustrate and not limit the invention, as illustrated in the accompanying drawings, in which:
FIG. 1 is a process flow diagram of the system and method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio.
In the figure: an oil removal grid 1; a circulation folded plate adjusting pool 2; a circulating folded plate anaerobic tank 3; a baffling double-circulation aerobic tank 4; a high-efficiency rotational flow sedimentation tank 5; a chemical catalytic micro-biological aerated filter (CCBF) 6; a high-efficiency fiber filtering device 7; a reclaimed water storage tank 8; a septic tank 9.
The invention is further illustrated with reference to the following figures and examples.
Detailed Description
It will be apparent that those skilled in the art can make many modifications and variations based on the spirit of the present invention.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The following examples are further illustrative and should not be construed as limiting the embodiments of the present invention.
Example 1: as shown in figure 1, the system and the method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio mainly comprise an oil removing grid, a loop folded plate adjusting tank, a loop folded plate anaerobic tank, a baffled dual-cycle aerobic tank, a high-efficiency rotational flow sedimentation tank, a chemical catalytic micro-aeration biological filter (CCBF), a high-efficiency fiber filtering device, a reclaimed water storage tank, a septic tank, a sludge treatment device, a disinfection facility, an automatic control system, various pipelines, valves, a water pump and the like.
A high ammonia nitrogen low carbon/nitrogen ratio domestic sewage treatment system and method, the high ammonia nitrogen low carbon/nitrogen ratio domestic sewage through septic tank 9 enters the deoiling grid 1; the rear part of the oil removing grid 1 is connected with a circulation folded plate adjusting tank 2, the rear part of the flow folded plate adjusting tank 2 is connected with a circulation folded plate anaerobic tank 3, the circulation folded plate anaerobic tank 3 is connected with a second-stage baffling double-circulation aerobic tank 4 in series, the rear part of the baffling double-circulation aerobic tank 4 is connected with a high-efficiency rotational flow sedimentation tank 5, the high-efficiency rotational flow sedimentation tank 5 is respectively connected with a CCBF6, the circulation folded plate anaerobic tank 3, the second-stage baffling double-circulation aerobic tank 4 and a septic tank 9, the CCBF6 is respectively connected with a high-efficiency fiber filtering device 7 and a septic tank 9, the high-efficiency fiber filtering device 7 is respectively connected with a reclaimed water storage tank 8 and a septic tank 9, the reclaimed water storage tank 8 is connected with a disinfection facility, the output of the disinfection facility is connected;
the pipeline, the valve and the water pump respectively connect the oil removing grating 1, the circulation folded plate regulating tank 2, the circulation folded plate anaerobic tank 3, the baffled double-circulation aerobic tank 4, the high-efficiency rotational flow sedimentation tank 5, the chemical catalysis micro-aeration biological filter (CCBF)6, the high-efficiency fiber filtering device 7, the reclaimed water storage tank 8 and the septic tank 9;
the invention aims at the problems of low treatment process efficiency, high treatment cost, difficult standard discharge and the like of domestic sewage in expressway service areas, domestic sewage in railway stations and part of domestic sewage, and provides a method for overcoming the defects of the prior art and realizing that the quality of treated effluent meets the requirements of 'quality of water for urban sewage recycling landscape environment' GB/T18921-2002 and 'quality of urban sewage recycling urban miscellaneous Water' GB/T18920 + 2002 on the premise of low investment and low operation cost.
Example 2: as shown in figure 1, the oil removing grating in the system and the method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio can remove larger floaters and grease in the sewage; because the quality and the quantity of the domestic sewage in the service area of the expressway, the domestic sewage in a railway station and the sewage in partial domestic areas change greatly along with the time, in order to ensure the stability of the subsequent biological treatment, a circulation folded plate adjusting tank is arranged to adjust the quality and the quantity of the sewage, so that the stability of the quality and the quantity of the sewage is ensured;
the arrangement of the circular flow folded plate anaerobic tank is used for hydrolysis and denitrification of macromolecular organic matters in sewage;
the secondary baffling dual-circulation aerobic tanks are connected in series and used for reinforcing synchronous nitrification and denitrification of the aerobic granular activated sludge, and increasing the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage;
the high-efficiency rotational flow sedimentation tank is used for separating mud and water, and reflows part of granular activated sludge to the circular flow folded plate anaerobic tank and the secondary baffling dual-circulation aerobic tank, so that the effective recovery of the granular activated sludge is realized;
the chemical catalysis micro-aeration biological filter (CCBF) utilizes a carbon-free special-effect chemical catalysis biological carrier to further remove pollutants such as nitrate nitrogen, phosphorus and the like in water, so that the total nitrogen and the total phosphorus in the wastewater meet the requirement of regeneration reuse water, and the chemical catalysis biological carrier added in the CCBF is an aerobic low carbon nitrogen ratio sewage ammonia nitrogen direct denitrification biological particle carrier prepared by an invention patent 'aerobic low carbon nitrogen ratio sewage ammonia nitrogen direct denitrification biological particle carrier and a preparation method' (patent No. ZL201310093411.5) which is issued by the applicant on the 07-23-year-2014;
the high-efficiency fiber filtering device can quickly filter and remove trace suspended matters in the CCBF effluent;
sludge generated by the high-efficiency rotational flow sedimentation tank, the CCBF and the high-efficiency fiber filtering device enters the septic tank, and the sludge is transported outside or dehydrated on site through a manure suction truck, so that recycling and reduction are realized;
finally, the treated water enters a reclaimed water storage pool, and the reclaimed water can be used for flushing toilets, greening, landscapes and the like through a disinfection facility, so that resource recycling can be realized.
The water pump, the valve disinfection facilities and the like in the system and the method for treating the domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio realize automatic control.
Example 3: as shown in FIG. 1, a system and a method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio comprise the following steps;
step 1, domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio passes through an oil removal grid 1 through a septic tank 9, and large floaters and grease in the sewage are removed;
step 2, entering a circulation folded plate adjusting pool 2 to adjust the quality and quantity of the sewage;
step 3, the effluent of the circulation folded plate adjusting tank 2 enters a circulation folded plate anaerobic tank 3 again for hydrolysis and denitrification of macromolecular organic matters in the sewage;
step 4, enabling the effluent of the circular flow folded plate anaerobic tank 3 to enter a secondary baffled double-circulation aerobic tank 4 connected in series for enhancing synchronous nitrification and denitrification of the auxiliary aerobic granular activated sludge and increasing the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage;
step 5, enabling effluent of the baffling dual-circulation aerobic tank 4 to enter a high-efficiency rotational flow sedimentation tank 5 for mud-water separation, and enabling partial granular activated sludge to flow back to the circular flow folded plate anaerobic tank and the secondary baffling dual-circulation aerobic tank so as to realize effective recovery of the granular activated sludge;
step 6, the effluent of the high-efficiency rotational flow sedimentation tank 5 enters a chemical catalytic micro-aeration biological filter (CCBF)6, and pollutants such as nitrate nitrogen, phosphorus and the like in water are further removed by utilizing a carbon-free special-effect chemical catalytic biological carrier, so that the total nitrogen and the total phosphorus in the wastewater meet the requirements of regeneration reuse water;
step 7, the effluent of the CCBF6 enters a high-efficiency fiber filtering device 7, and trace suspended matters in the effluent of the CCBF are quickly filtered and removed;
step 8, the effluent of the high-efficiency fiber filtering device 7 enters a reclaimed water storage pool 8, and the reclaimed water is used for flushing toilets, greening, landscapes and the like through a disinfection facility;
and 9, sludge generated by the high-efficiency rotational flow sedimentation tank 5, the CCBF6 and the high-efficiency fiber filtering device 7 enters the septic tank 9, and the sludge is transported outside by a dung suction truck or is dehydrated on site.
The water amount of the domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio in the expressway service area treated by the invention is 200m3Step 1, removing 90% of large floaters and oil in the high ammonia nitrogen low carbon/nitrogen ratio domestic sewage in the sewage through an oil removing grating by a septic tank 9;
the sewage enters an circulation folded plate adjusting tank 2 in the step 2, the hydraulic retention time of the sewage in the circulation folded plate adjusting tank 2 is 6 hours, the quality and the quantity of the sewage are fully adjusted, and the effluent enters an circulation folded plate anaerobic tank 3;
in the step 3, the hydraulic retention time of the sewage in the circular folded plate anaerobic tank 3 is 6 hours, and the sewage is used for hydrolysis and denitrification of macromolecular organic matters in the sewage, wherein the total nitrogen is removed by 70 percent, and the COD is removed by 60 percent;
step 4, the effluent of the annular flow folded plate anaerobic tank 3 enters a secondary serial baffled dual-circulation aerobic tank 4, the hydraulic retention time is respectively 6h and 4h, the hydraulic baffled dual-circulation aerobic tank is used for enhancing the synchronous nitrification and denitrification of the aerobic granular activated sludge, the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage is increased, the soluble organic matters in the effluent are removed by more than 90 percent, the ammonia nitrogen is removed by more than 95 percent, the total nitrogen is removed by 60 percent, and the total phosphorus is removed by more than 80 percent;
in the step 5, the effluent of the baffling dual-circulation aerobic tank 4 enters a high-efficiency rotational flow sedimentation tank 5 for mud-water separation, the hydraulic retention time is 2.5h, and part of granular activated sludge flows back to the circular flow folded plate anaerobic tank and the secondary baffling dual-circulation aerobic tank, so that the effective recovery of the granular activated sludge is realized, and more than 85 percent of effluent suspended matters (SS) are removed;
in the step 6, the effluent of the high-efficiency rotational flow sedimentation tank 5 enters a chemical catalytic micro-aeration biological filter (CCBF)6, the hydraulic retention time is 8 hours, pollutants such as nitrate nitrogen, phosphorus and the like in the water are further removed by utilizing a carbon-free special-effect chemical catalytic biological carrier, so that the total nitrogen and the total phosphorus in the wastewater meet the requirement of regeneration reuse water, the soluble organic matter of the effluent is removed by more than 90 percent, the ammonia nitrogen is removed by more than 95 percent, the total nitrogen is removed by more than 85 percent, and the removal rate of the total phosphorus is more than 90 percent;
and (3) allowing the effluent water of the CCBF6 in the step (7) to enter a high-efficiency fiber filtering device (7), wherein the hydraulic retention time is 45min, and quickly filtering to remove trace suspended matters in the effluent water of the CCBF, so that the effluent SS meets the requirement of reuse water.
The treatment effect is shown in table 1 below.
Each index of the treated effluent reaches or is superior to the requirements of 'water quality for urban sewage recycling landscape environment' GB/T18921-2002 and 'water quality for urban sewage recycling urban miscellaneous water' GB/T18920-2002.
Table 1200 m3Water inlet and outlet of high ammonia nitrogen low carbon/nitrogen ratio domestic sewage treatment system in/d highway service area
Index of water quality
Figure BDA0001187554230000091
Example 4: as shown in figure 1, a system and a method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio comprise:
the oil removing grating 1 is used for removing larger floating objects and grease in the effluent of the septic tank;
the circulation folded plate adjusting tank 2 is used for adjusting the water quality and the water quantity of the sewage;
the circulation folded plate anaerobic tank 3 is used for biologically hydrolyzing macromolecular organic matters in the sewage and performing denitrification;
the secondary baffling dual-circulation aerobic tank 4 is connected in series and used for enhancing the synchronous nitrification and denitrification of the aerobic granular activated sludge, and increasing the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage;
the high-efficiency rotational flow sedimentation tank 5 is used for quickly separating mud and water, and reflows part of granular activated sludge to the circular flow folded plate anaerobic tank 3 and the secondary baffling dual-circulation aerobic tank 4, so that the effective recovery of the granular activated sludge is realized;
the CCBF6 is used for further removing pollutants such as nitrate nitrogen, phosphorus and the like in the water, so that the total nitrogen and the total phosphorus in the wastewater meet the requirements of regenerated reuse water;
the high-efficiency fiber filtering device 7 is used for rapidly filtering trace suspended matters in the CCBF6 effluent;
the reclaimed water storage tank 8 is used for storing reclaimed water for flushing toilets, greening, landscapes and the like;
the septic tank 9 is used for concentrating the sludge generated by the high-efficiency rotational flow sedimentation tank 5, the CCBF6 and the high-efficiency fiber filtering device 7;
the chemical catalytic biological carrier added in CCBF6 is an aerobic biological particle carrier with low carbon-nitrogen ratio for directly denitrifying sewage ammonia nitrogen, which is prepared by the patent of invention patent 'aerobic biological particle carrier with low carbon-nitrogen ratio for directly denitrifying sewage ammonia nitrogen and preparation method' (patent number ZL201310093411.5) granted by the applicant on 07/23/2014;
the disinfection facilities, valves, water pumps and the like in the high ammonia nitrogen low carbon/nitrogen ratio domestic sewage treatment system and method are automatically controlled.
As described above, although the embodiments of the present invention have been described in detail, it will be apparent to those skilled in the art that many modifications are possible without substantially departing from the spirit and scope of the present invention. Therefore, such modifications are also all included in the scope of protection of the present invention.

Claims (8)

1. A method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio is characterized by also comprising the following steps:
step 1, domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio passes through an oil removal grid through a septic tank, and large floating objects and grease in the sewage are removed;
step 2, entering a circulation folded plate adjusting tank to adjust the quality and quantity of the sewage;
step 3, enabling the effluent of the circulation folded plate regulating tank to enter a circulation folded plate anaerobic tank for hydrolysis and denitrification of macromolecular organic matters in the sewage;
step 4, enabling the effluent of the circular flow folded plate anaerobic tank to enter a secondary baffled aerobic tank connected in series for enhancing synchronous nitrification and denitrification of the auxiliary aerobic granular activated sludge and improving the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage;
step 5, enabling effluent of the baffling aerobic tank to enter a cyclone sedimentation tank for mud-water separation, and enabling partial granular activated sludge to flow back to the circulation folded plate anaerobic tank and the secondary baffling aerobic tank to achieve effective recovery of the granular activated sludge;
step 6, the effluent of the cyclone sedimentation tank enters a chemical catalytic micro-aeration biological filter CCBF, and nitrate nitrogen and phosphorus pollutants in the water are further removed by using a carbon-free chemical catalytic biological carrier, so that the total nitrogen and the total phosphorus in the wastewater meet the requirements of regeneration reuse water;
step 7, feeding the CCBF effluent into a fiber filtering device, and filtering to remove trace suspended matters in the CCBF effluent;
step 8, the effluent of the fiber filtering device enters a reclaimed water storage pool, and the reclaimed water is used for flushing a toilet, greening and landscaping through a disinfection facility;
and 9, sludge produced by the cyclone sedimentation tank, the chemical catalytic micro-aeration biological filter CCBF and the fiber filtering device enters a septic tank, and the sludge is transported outside or dewatered on site by a dung suction truck.
2. The method for treating the domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio as claimed in claim 1, wherein the domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio in the step 1 is firstly treated by an oil removing grating to remove 90% of larger floaters and grease in the sewage; and 2, entering a circulation folded plate adjusting tank, fully adjusting the quality and quantity of the sewage when the hydraulic retention time of the sewage in the circulation folded plate adjusting tank is 6h, and enabling the effluent to enter an circulation folded plate anaerobic tank.
3. The method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio as claimed in claim 1, wherein the hydraulic retention time of the sewage in the anaerobic tank with the circular flow folded plate in the step 3 is 6h, and the sewage is used for hydrolysis and denitrification of macromolecular organic matters in the sewage, wherein the total nitrogen is removed by 70%, and the COD is removed by 60%.
4. The method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio as claimed in claim 1, wherein the effluent of the annular flow baffled anaerobic tank in step 4 enters a secondary series-connected baffled aerobic tank, and the hydraulic retention time is 6h and 4h respectively, so as to enhance the synchronous nitrification and denitrification of the aerobic granular activated sludge, improve the efficiency of removing high ammonia nitrogen and soluble organic matters in the sewage, remove more than 90% of soluble organic matters in the effluent, remove more than 95% of ammonia nitrogen, remove 60% of total nitrogen and remove more than 80% of total phosphorus.
5. The method as claimed in claim 1, wherein in step 5, the effluent of the baffled aerobic tank enters a cyclone sedimentation tank, the hydraulic retention time is 2.5 hours, sludge-water separation is carried out, and part of granular activated sludge flows back to the circular folded plate anaerobic tank and the secondary baffled aerobic tank, so that the effective recovery of the granular activated sludge is realized, and more than 85% of suspended substances SS in the effluent is removed.
6. The method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio as claimed in claim 1, wherein the effluent of the cyclone sedimentation tank enters a chemical catalytic micro-aeration biological filter CCBF in step 6, the hydraulic retention time is 8h, and nitrate nitrogen and phosphorus pollutants in the water are further removed by using a carbon-free chemical catalytic biological carrier, so that the total nitrogen and the total phosphorus in the wastewater meet the requirement of regeneration reuse water, the soluble organic matter in the effluent is removed by more than 90%, the ammonia nitrogen is removed by more than 95%, the total nitrogen is removed by more than 85%, and the removal rate of the total phosphorus is more than 90%.
7. The method for treating domestic sewage with high ammonia nitrogen and low carbon/nitrogen ratio as claimed in claim 1, wherein the effluent from the chemical catalysis micro-aeration biological filter CCBF of step 7 enters a fiber filter unit, the hydraulic retention time is 45min, and the micro suspended matters in the effluent from the chemical catalysis micro-aeration biological filter CCBF are removed by filtration, so that the effluent SS meets the requirement of reuse water.
8. A high ammonia nitrogen low carbon/nitrogen ratio domestic sewage treatment system, characterized by that the high ammonia nitrogen low carbon/nitrogen ratio domestic sewage through the septic tank enters the deoiling grid; the device comprises an oil removing grid, a circulation folded plate adjusting tank, a circulation folded plate anaerobic tank, a second-stage baffled aerobic tank, a vortex sedimentation tank, a second-stage baffled aerobic tank, a chemical catalytic micro-aeration biological filter CCBF, a circulation folded plate anaerobic tank, a second-stage baffled aerobic tank and a septic tank, wherein the oil removing grid is connected with the rear part of the oil removing grid;
the oil removal grating is used for removing larger floating objects and grease in the effluent of the septic tank;
the circulation folded plate adjusting tank is used for adjusting the water quality and the water quantity of the sewage;
the circulation folded plate anaerobic tank is used for biologically hydrolyzing macromolecular organic matters in the sewage and performing denitrification;
the secondary baffled aerobic tanks are connected in series and used for reinforcing synchronous nitrification and denitrification of aerobic granular activated sludge, so that the efficiency of removing high ammonia nitrogen and soluble organic matters in sewage is improved;
the cyclone sedimentation tank is used for separating mud and water, and part of granular activated sludge flows back to the circulation folded plate anaerobic tank and the secondary baffling aerobic tank, so that the effective recovery of the granular activated sludge is realized;
the chemical catalysis micro-aeration biological filter CCBF is used for further removing nitrate nitrogen and phosphorus pollutants in water, so that the total nitrogen and the total phosphorus in the wastewater meet the requirements of regeneration reuse water;
the fiber filtering device is used for filtering trace suspended matters in the effluent water of the chemical catalysis micro-aeration biological filter CCBF;
the reclaimed water storage pool is used for storing water for flushing toilet, greening and landscape recycling;
the disinfection facility is used for the inactivation treatment of bacteria in the reuse water.
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CN107417045A (en) * 2017-08-23 2017-12-01 北京交通大学 A kind of low carbon/nitrogen ratio wastewater efficient denitrification dephosphorization system and method
CN109205932B (en) * 2018-09-18 2021-03-30 北京交通大学 System and method for efficiently removing nitrogen and phosphorus in sewage by biochemical combination
CN109467267A (en) * 2018-11-30 2019-03-15 北京市高速公路交通工程有限公司 Highway guard station service area Decentralized Wastewater Treatment and its method
CN109912128B (en) * 2019-04-01 2022-01-14 北京工业大学 Synchronous nitrogen and phosphorus removal system for continuous flow aerobic granular sludge with low carbon-nitrogen ratio
CN110550844B (en) * 2019-08-20 2020-10-20 四川大学 Domestic sewage's processing system

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CN203582658U (en) * 2013-12-10 2014-05-07 海天水务集团股份公司 Multi-stage aeration reclaimed water treatment system for medium and small towns
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