CN110563128A - MBBR (moving bed biofilm reactor) sewage treatment filler and using method thereof - Google Patents
MBBR (moving bed biofilm reactor) sewage treatment filler and using method thereof Download PDFInfo
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- CN110563128A CN110563128A CN201910829291.8A CN201910829291A CN110563128A CN 110563128 A CN110563128 A CN 110563128A CN 201910829291 A CN201910829291 A CN 201910829291A CN 110563128 A CN110563128 A CN 110563128A
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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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
the invention discloses a filler for MBBR sewage treatment, which comprises the following raw materials in parts by weight: 50-70 parts of polyethylene, 30-50 parts of polypropylene, 10-20 parts of polyurethane foam, 20-30 parts of modified polyethylene, 5-10 parts of modified polypropylene, 5-10 parts of activated carbon, 7-8 parts of starch and 3-5 parts of gelatin. According to the invention, the prepared filler can promote the growth and propagation of microorganisms by adding activated carbon, starch and gelatin materials as bioactive additives in the filler raw materials, the filler grid plate is made of a material with low smooth adsorbability, the blockage of the filler on the grid can be effectively reduced, the adhesion rate of sludge is reduced, the normal operation of the filler and the sludge on the whole domestic sewage treatment system is effectively prevented, the arrangement of an air inlet pipeline is improved and the distribution of aeration heads in the tank is optimized by calculating the hydraulic characteristics of the tank type, so that the air inlet distribution at four sides and four corners of the tank is uniform, the energy consumption is reduced, and the economic benefit of MBBR sewage treatment is improved.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a filler for MBBR sewage treatment, and also relates to a using method of the filler for MBBR sewage treatment.
Background
the MBBR process principle is to apply the basic principle of the biofilm method, fully utilize the advantages of the activated sludge method and overcome the defects of the traditional activated sludge method and the fixed biofilm method. According to the method, a certain amount of suspension carriers are added into the reactor, so that the biomass and the biological species in the reactor are improved, and the treatment efficiency of the reactor is improved. As the density of the filler is close to that of water, the filler is completely mixed with the water during aeration, and the environment for the growth of microorganisms is three phases of gas, liquid and solid. The collision and shearing action of the carrier in water makes air bubbles finer, and the utilization rate of oxygen is increased. In addition, each carrier has different biological species inside and outside, anaerobic bacteria or facultative bacteria grow inside, aerobic bacteria grow outside, each carrier is a micro-reactor, and nitrification reaction and denitrification reaction exist at the same time, so that the treatment effect is improved.
the existing filler for MBBR sewage treatment generally adopts polyethylene, polypropylene or a modified structure, so that the prepared filler has no promotion effect on the growth and reproduction of organisms, the biological characteristics of a carrier are reduced, the filler and sludge in the MBBR sewage treatment easily block a grid plate, and the economic benefit of the MBBR sewage treatment is reduced due to factors such as unreasonable installation of an aeration head and the like.
disclosure of Invention
the invention aims to provide a filler for MBBR sewage treatment and a using method thereof, wherein activated carbon, starch and gelatin materials are added in the raw materials of the filler as bioactive additives, so that the prepared filler can promote the growth and reproduction of microorganisms, a filler grid plate is made of a material with small smoothness and adsorbability, the blockage of the filler on a grid can be effectively reduced, the attachment rate of sludge is reduced, the normal operation of the filler and the sludge on the whole domestic sewage treatment system is effectively prevented, the energy consumption is reduced, the economic benefit of the MBBR sewage treatment is improved, and the problems in the background art are solved.
in order to achieve the purpose, the invention provides the following technical scheme: the filler for MBBR sewage treatment comprises the following raw materials in parts by mass: 50-70 parts of polyethylene, 30-50 parts of polypropylene, 10-20 parts of polyurethane foam, 20-30 parts of modified polyethylene, 5-10 parts of modified polypropylene, 5-10 parts of activated carbon, 7-8 parts of starch and 3-5 parts of gelatin.
Preferably, the modified polyethylene comprises chlorinated polyethylene, chlorosulfonated polyethylene, crosslinked polyethylene and blended modified polyethylene, and the mixing ratio of the chlorinated polyethylene, the chlorosulfonated polyethylene, the crosslinked polyethylene and the blended modified polyethylene is 2: 1: 2: 1.
preferably, the chlorinated polyethylene contains chlorine content higher than 40%; the chlorosulfonated polyethylene is prepared by chlorinating and chlorosulfonating polyethylene by a phase suspension method; the crosslinked polyethylene is a high molecular polymer prepared by any one of silane crosslinking, high-energy radiation crosslinking, peroxide crosslinking and ultraviolet irradiation crosslinking; the blending modified polyethylene is any one of a HDPE/LDPE blending system, a PE/EVA blending system, a PE/elastomer blending system, a PE/PP/POE blending system and a PE/PS/SBS blending system.
preferably, the modified polyethylene is a modified polypropylene material obtained by mixing polypropylene resin, a modifier, an auxiliary agent, a filler and a pigment component and extruding and granulating the mixture in a screw extruder.
Preferably, the polypropylene resin, the modifier, the auxiliary agent, the filler and the pigment are mixed by the following mass percentages: 50-60% of polypropylene resin, 10-20% of modifier, 5-10% of auxiliary agent, 10-20% of filler and 1-3% of pigment.
Preferably, the polyethylene, the polypropylene, the polyurethane foam, the modified polyethylene, the modified polypropylene, the activated carbon, the starch and the gelatin are uniformly mixed according to parts by weight, extruded by a screw extruder and subjected to injection molding to prepare the MBBR sewage treatment filler.
preferably, the filler for MBBR sewage treatment is cylindrical granular substance, and the carrier size of the filler for MBBR sewage treatment is 12 x 8 mm.
The invention also provides a using method of the filler for MBBR sewage treatment, which comprises the following steps:
S1: manufacturing a filler grid plate, connecting and splicing grid bars into grid blocks in groups, and then installing the grid blocks on a supporting surface in a block mode, wherein the width of each block is smaller than the diameter of a manhole so that the grid blocks can be fed into a tower from the manhole, and the grid bars need to be designed in a segmented mode when the diameter of the tower is larger;
S2: selecting a material with small smooth adsorbability, and enlarging the gap on the premise of ensuring that the filler can be trapped, so that the filler is not easily attached by suspended substances;
s3: growing the biological film in a filler carrier, wherein the carrier freely moves along with water flow in a reactor;
s4: in an aerobic reactor, the carriers are pushed to move by aeration; moving the carrier in the anaerobic reactor by mechanical agitation;
s5: the filler grating plate is arranged at the outlet of the reactor and used for filtering the filler to prevent the loss of the filler in the reactor;
s6: the reactor in cuboid shape is divided into 2-4 grids along the length direction of the pool by partition boards, the water flow is in plug flow state in the reactor, and the water flow is in complete mixing state in each grid under the action of aeration fluidization;
S7: perforating one side of the reactor, aerating the perforated aeration pipe at one side to make the filler circularly flow in the tank, and arranging a microporous aeration head at the bottom of the reactor with a cylindrical structure;
S8: the bottom of the reactor is additionally provided with a stirring device, so that the reactor is conveniently and flexibly applied to an anoxic state for use;
S9: in order to prevent the air stripping effect and the volatilization effect brought by aeration, a cover is added above the reactor for use.
preferably, the filler grid plate manufactured in step S1 is composed of two or sixteen grid-type support plates, and the void ratio is 90-95%.
Preferably, the step S1 selects a grid plate made of a ceramic material, and the spacing between the grid plates is in the range of 3-10 cm.
preferably, the DO concentration in the aerobic reactor in the step S4 is not lower than 2mg/L, the pH value is 6.5-7.5, and the liquid temperature in the aerobic reactor is 20-30 ℃.
preferably, the volume load of the anaerobic reactor in the step S4 reaches 10-18kgCODM3.d, the height-diameter ratio of the reactor is 4-8, and the height of the reactor is not lower than 20 m.
preferably, in the step S5, the number of the layers of the packing grid plates at the outlet position of the reactor is not less than two, and the connecting position of the adjacent packing grid plates is provided with a sealing structure for sealing the connecting position.
preferably, when the aeration heads are designed in step S7, the arrangement of the air inlet pipelines is improved and the distribution of the aeration heads in the tank is optimized by calculating the hydraulic characteristics of the tank model, and then the tightness of the nuts fastening the rubber pads on each aeration head is adjusted according to the actual aeration conditions, so as to adjust the aeration amount of each aeration head, and perforated aeration pipes can be used, so that the air inlets on four sides and four corners of the tank are uniformly distributed.
preferably, the stirring device used in step S8 is a CBY21 type paddle-to-side stirring device, and the horizontal deflection angle of the stirring device is 15 to 20 °, and the downward deflection angle is 1 to 5 °.
Compared with the prior art, the invention has the beneficial effects that: the invention strictly controls the filler for MBBR sewage treatment and the using method thereof, the formula and the preparation process parameters of the filler for MBBR sewage treatment are strictly controlled, active carbon, starch and gelatin materials are added in the raw materials of the filler as bioactive additives, so that the prepared filler can promote the growth and the reproduction of microorganisms, the filler grid plate adopts a material with small smooth adsorbability, the blockage of the filler on a grid can be effectively reduced, the attachment rate of sludge is reduced, the normal operation of the filler and the sludge on the whole domestic sewage treatment system is effectively prevented, the arrangement of an air inlet pipeline and the distribution of aeration heads in a pond are improved by the design of the aeration heads through the calculation of hydraulic characteristics of the pond shape, the degree of nuts of rubber pads fixed on each aeration head is adjusted according to the actual aeration condition, the aeration quantity of a single aeration head is adjusted, and perforated aeration pipes can be adopted, the four sides and four corners of the pool are convenient to be uniformly distributed, the energy consumption can be reduced, and the economic benefit of MBBR sewage treatment is improved.
Detailed Description
in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The invention provides a filler for MBBR sewage treatment, which comprises the following specific examples in parts by weight:
example 1
the filler for MBBR sewage treatment comprises the following raw materials in parts by mass: 50 parts of polyethylene, 30 parts of polypropylene, 10 parts of polyurethane foam, 20 parts of modified polyethylene, 5 parts of modified polypropylene, 5 parts of activated carbon, 7 parts of starch and 3 parts of gelatin, wherein the modified polyethylene comprises chlorinated polyethylene, chlorosulfonated polyethylene, crosslinked polyethylene and blending modified polyethylene, and the mixing ratio of the chlorinated polyethylene, the chlorosulfonated polyethylene, the crosslinked polyethylene and the blending modified polyethylene is 2: 1: 2: 1, the chlorine content of the chlorinated polyethylene is higher than 40%; the chlorosulfonated polyethylene is prepared by chlorinating and chlorosulfonating polyethylene by a phase suspension method; the crosslinked polyethylene is a high molecular polymer prepared by any one of silane crosslinking, high-energy radiation crosslinking, peroxide crosslinking and ultraviolet irradiation crosslinking; the blending modified polyethylene is any one of a HDPE/LDPE blending system, a PE/EVA blending system, a PE/elastomer blending system, a PE/PP/POE blending system and a PE/PS/SBS blending system, the modified polyethylene is a modified polypropylene material obtained by mixing polypropylene resin, a modifier, an auxiliary agent, a filler and a pigment and extruding and granulating in a screw extruder, and the mixing mass percentages of the polypropylene resin, the modifier, the auxiliary agent, the filler and the pigment are respectively as follows: 60% of polypropylene resin, 15% of a modifier, 9% of an auxiliary agent, 15% of a filler and 1% of a pigment, wherein the polyethylene, the polypropylene, the polyurethane foam, the modified polyethylene, the modified polypropylene, the activated carbon, the starch and the gelatin are uniformly mixed in parts by mass, extruded by a screw extruder and subjected to injection molding to prepare the MBBR sewage treatment filler, the MBBR sewage treatment filler is cylindrical granular matter, and the size of a carrier of the MBBR sewage treatment filler is 12 x 8 mm.
in the filler for MBBR sewage treatment provided by the invention, the data of the modified polyethylene according to the specific embodiment in percentage by mass are shown in the following table 2:
The invention also provides a using method of the filler for MBBR sewage treatment, which comprises the following steps:
S1: manufacturing a filler grid plate, connecting and splicing grid bars into grid blocks in groups, and then installing the grid blocks on a supporting surface in a block mode, wherein the width of each block is smaller than the diameter of a manhole so that the grid blocks can be fed into a tower from the manhole, and the grid bars need to be designed in a segmented mode when the diameter of the tower is larger;
s2: selecting a material with small smooth adsorbability, and enlarging the gap on the premise of ensuring that the filler can be trapped, so that the filler is not easily attached by suspended substances;
s3: growing the biological film in a filler carrier, wherein the carrier freely moves along with water flow in a reactor;
S4: in an aerobic reactor, the carriers are pushed to move by aeration; moving the carrier in the anaerobic reactor by mechanical agitation;
s5: the filler grating plate is arranged at the outlet of the reactor and used for filtering the filler to prevent the loss of the filler in the reactor;
S6: the reactor in a cuboid shape is evenly divided into 2 grids along the length direction of the pool by using partition plates, the water flow is in a plug flow state in the reactor, and the water flow is in a complete mixing state in each grid under the action of aeration fluidization;
S7: perforating one side of the reactor, aerating the perforated aeration pipe at one side to make the filler circularly flow in the tank, and arranging a microporous aeration head at the bottom of the reactor with a cylindrical structure;
S8: the bottom of the reactor is additionally provided with a stirring device, so that the reactor is conveniently and flexibly applied to an anoxic state for use;
s9: in order to prevent the air stripping effect and the volatilization effect brought by aeration, a cover is added above the reactor for use.
The filler grid plate manufactured in the step S1 is composed of two sections and sixteen grid type support plates, the void ratio is 90%, the grid plate made of ceramic materials is selected in the step S1, the distance between the grid plates is 3cm, the DO concentration in the aerobic reactor in the step S4 is not lower than 2mg/L, the pH value is 6.5, the temperature of liquid in the aerobic reactor is 20 ℃, the volume load of the anaerobic reactor in the step S4 reaches 10kgCODM3.d, the height-diameter ratio of the reactor is 4, the height of the reactor is not lower than 20m, the number of layers of the filler grid plate at the outlet position of the reactor in the step S5 is not lower than two layers, a sealing structure is arranged at the connecting position of the adjacent filler grid plates for packaging the connecting position, when the aeration head in the step S7 is designed, the arrangement of an air inlet pipeline is improved and the distribution of the aeration heads in the pool is optimized through the calculation of the pool type as hydraulic characteristic, and adjusting the tightness degree of nuts for fastening rubber pads on the aeration heads according to actual aeration conditions, adjusting the aeration amount of a single aeration head, and adopting perforated aeration pipes to facilitate uniform distribution of air intake at four sides and four corners of the tank, wherein the stirring device adopted in the step S8 is a CBY21 type paddle opposite-side-extending stirring device, and the horizontal deflection angle of the stirring device is 15 degrees and the downward deflection angle is 1 degree.
Example 2
The filler for MBBR sewage treatment comprises the following raw materials in parts by mass: 60 parts of polyethylene, 40 parts of polypropylene, 15 parts of polyurethane foam, 25 parts of modified polyethylene, 7.5 parts of modified polypropylene, 7.5 parts of activated carbon, 7.5 parts of starch and 4 parts of gelatin, wherein the modified polyethylene comprises chlorinated polyethylene, chlorosulfonated polyethylene, crosslinked polyethylene and blending modified polyethylene, and the mixing ratio of the chlorinated polyethylene, the chlorosulfonated polyethylene, the crosslinked polyethylene and the blending modified polyethylene is 2: 1: 2: 1, the chlorine content of the chlorinated polyethylene is higher than 40%; the chlorosulfonated polyethylene is prepared by chlorinating and chlorosulfonating polyethylene by a phase suspension method; the crosslinked polyethylene is a high molecular polymer prepared by any one of silane crosslinking, high-energy radiation crosslinking, peroxide crosslinking and ultraviolet irradiation crosslinking; the blending modified polyethylene is any one of a HDPE/LDPE blending system, a PE/EVA blending system, a PE/elastomer blending system, a PE/PP/POE blending system and a PE/PS/SBS blending system, the modified polyethylene is a modified polypropylene material obtained by mixing polypropylene resin, a modifier, an auxiliary agent, a filler and a pigment and extruding and granulating in a screw extruder, and the mixing mass percentages of the polypropylene resin, the modifier, the auxiliary agent, the filler and the pigment are respectively as follows: 50% of polypropylene resin, 20% of a modifier, 7% of an auxiliary agent, 20% of a filler and 3% of a pigment, wherein the polyethylene, the polypropylene, the polyurethane foam, the modified polyethylene, the modified polypropylene, the activated carbon, the starch and the gelatin are uniformly mixed in parts by mass, extruded by a screw extruder and subjected to injection molding to prepare the MBBR sewage treatment filler, the MBBR sewage treatment filler is cylindrical granular substance, and the size of a carrier of the MBBR sewage treatment filler is 12 x 8 mm.
The invention also provides a using method of the filler for MBBR sewage treatment, which comprises the following steps:
S1: manufacturing a filler grid plate, connecting and splicing grid bars into grid blocks in groups, and then installing the grid blocks on a supporting surface in a block mode, wherein the width of each block is smaller than the diameter of a manhole so that the grid blocks can be fed into a tower from the manhole, and the grid bars need to be designed in a segmented mode when the diameter of the tower is larger;
S2: selecting a material with small smooth adsorbability, and enlarging the gap on the premise of ensuring that the filler can be trapped, so that the filler is not easily attached by suspended substances;
S3: growing the biological film in a filler carrier, wherein the carrier freely moves along with water flow in a reactor;
s4: in an aerobic reactor, the carriers are pushed to move by aeration; moving the carrier in the anaerobic reactor by mechanical agitation;
s5: the filler grating plate is arranged at the outlet of the reactor and used for filtering the filler to prevent the loss of the filler in the reactor;
S6: the reactor in cuboid shape is divided into 3 grids along the length direction of the pool by partition boards, the water flow is in plug flow state in the reactor, and in each grid, the water flow is in complete mixing state under the action of aeration fluidization;
s7: perforating one side of the reactor, aerating the perforated aeration pipe at one side to make the filler circularly flow in the tank, and arranging a microporous aeration head at the bottom of the reactor with a cylindrical structure;
S8: the bottom of the reactor is additionally provided with a stirring device, so that the reactor is conveniently and flexibly applied to an anoxic state for use;
s9: in order to prevent the air stripping effect and the volatilization effect brought by aeration, a cover is added above the reactor for use.
The filler grid plate manufactured in the step S1 is composed of two sections and sixteen grid type support plates, the void ratio is 92.5%, the grid plate made of a ceramic material is selected in the step S1, the spacing range of the grid plates is 6.5cm, the DO concentration in the aerobic reactor in the step S4 is not lower than 2mg/L, the pH value is 7.0, the liquid temperature in the aerobic reactor is 25 ℃, the volume load of the anaerobic reactor in the step S4 reaches 14 kgcoc 3 dm3 d, the height-diameter ratio of the reactor is 6, the height of the reactor is not lower than 20m, the number of layers of the filler grid plates at the outlet position of the reactor in the step S5 is not lower than two, a sealing structure is arranged at the connecting position of the adjacent filler grid plates for packaging the connecting position, when the aeration head in the step S7 is designed, the arrangement of aeration heads in the pool is improved and the distribution of the aeration heads in the pool is optimized by using the pool type as a hydraulic characteristic calculation, and adjusting the tightness degree of nuts for fastening rubber pads on the aeration heads according to actual aeration conditions, adjusting the aeration amount of a single aeration head, and adopting perforated aeration pipes to facilitate uniform distribution of air intake at four sides and four corners of the tank, wherein the stirring device adopted in the step S8 is a CBY21 type paddle opposite-side-extending stirring device, and the horizontal deflection angle of the stirring device is 17.5 degrees and the downward deflection angle is 3 degrees.
example 3
the filler for MBBR sewage treatment comprises the following raw materials in parts by mass: 70 parts of polyethylene, 50 parts of polypropylene, 20 parts of polyurethane foam, 30 parts of modified polyethylene, 10 parts of modified polypropylene, 10 parts of activated carbon, 8 parts of starch and 5 parts of gelatin, wherein the modified polyethylene comprises chlorinated polyethylene, chlorosulfonated polyethylene, crosslinked polyethylene and blending modified polyethylene, and the mixing ratio of the chlorinated polyethylene, the chlorosulfonated polyethylene, the crosslinked polyethylene and the blending modified polyethylene is 2: 1: 2: 1, the chlorine content of the chlorinated polyethylene is higher than 40%; the chlorosulfonated polyethylene is prepared by chlorinating and chlorosulfonating polyethylene by a phase suspension method; the crosslinked polyethylene is a high molecular polymer prepared by any one of silane crosslinking, high-energy radiation crosslinking, peroxide crosslinking and ultraviolet irradiation crosslinking; the blending modified polyethylene is any one of a HDPE/LDPE blending system, a PE/EVA blending system, a PE/elastomer blending system, a PE/PP/POE blending system and a PE/PS/SBS blending system, the modified polyethylene is a modified polypropylene material obtained by mixing polypropylene resin, a modifier, an auxiliary agent, a filler and a pigment and extruding and granulating in a screw extruder, and the mixing mass percentages of the polypropylene resin, the modifier, the auxiliary agent, the filler and the pigment are respectively as follows: 55% of polypropylene resin, 15% of a modifier, 10% of an auxiliary agent, 19% of a filler and 1% of a pigment, wherein the polyethylene, the polypropylene, the polyurethane foam, the modified polyethylene, the modified polypropylene, the activated carbon, the starch and the gelatin are uniformly mixed in parts by mass, extruded by a screw extruder and subjected to injection molding to prepare the MBBR sewage treatment filler, the MBBR sewage treatment filler is cylindrical granular substance, and the size of a carrier of the MBBR sewage treatment filler is 12 x 8 mm.
The invention also provides a using method of the filler for MBBR sewage treatment, which comprises the following steps:
S1: manufacturing a filler grid plate, connecting and splicing grid bars into grid blocks in groups, and then installing the grid blocks on a supporting surface in a block mode, wherein the width of each block is smaller than the diameter of a manhole so that the grid blocks can be fed into a tower from the manhole, and the grid bars need to be designed in a segmented mode when the diameter of the tower is larger;
S2: selecting a material with small smooth adsorbability, and enlarging the gap on the premise of ensuring that the filler can be trapped, so that the filler is not easily attached by suspended substances;
S3: growing the biological film in a filler carrier, wherein the carrier freely moves along with water flow in a reactor;
S4: in an aerobic reactor, the carriers are pushed to move by aeration; moving the carrier in the anaerobic reactor by mechanical agitation;
s5: the filler grating plate is arranged at the outlet of the reactor and used for filtering the filler to prevent the loss of the filler in the reactor;
S6: the cuboid reactor is evenly divided into 4 grids along the length direction of the tank by using partition plates, the water flow is in a plug flow state in the reactor, and the water flow is in a completely mixed state in each grid under the action of aeration fluidization;
s7: perforating one side of the reactor, aerating the perforated aeration pipe at one side to make the filler circularly flow in the tank, and arranging a microporous aeration head at the bottom of the reactor with a cylindrical structure;
s8: the bottom of the reactor is additionally provided with a stirring device, so that the reactor is conveniently and flexibly applied to an anoxic state for use;
s9: in order to prevent the air stripping effect and the volatilization effect brought by aeration, a cover is added above the reactor for use.
The filler grid plate manufactured in the step S1 is composed of two sections and sixteen grid type support plates, the void ratio is 95%, the grid plate made of ceramic materials is selected in the step S1, the spacing range of the grid plates is 10cm, the DO concentration in the aerobic reactor in the step S4 is not lower than 2mg/L, the pH value is 7.5, the temperature of liquid in the aerobic reactor is 30 ℃, the volume load of the anaerobic reactor in the step S4 reaches 18kgCODM3.d, the height-diameter ratio of the reactor is 8, the height of the reactor is not lower than 20m, the number of layers of the filler grid plates at the outlet position of the reactor in the step S5 is not lower than two, a sealing structure is arranged at the connecting position of the adjacent filler grid plates for packaging the connecting position, when the aeration head is designed in the step S7, the arrangement of an air inlet pipeline is improved and the distribution of the aeration head in the aeration tank is optimized through the calculation of the hydraulic characteristic of the tank type, and adjusting the tightness degree of nuts for fastening rubber pads on the aeration heads according to actual aeration conditions, adjusting the aeration amount of a single aeration head, and adopting perforated aeration pipes to facilitate uniform distribution of air intake at four sides and four corners of the tank, wherein the stirring device adopted in the step S8 is a CBY21 type paddle opposite-side-extending stirring device, and the horizontal deflection angle of the stirring device is 20 degrees and the downward deflection angle is 5 degrees.
In summary, the following steps: the invention strictly controls the filler for MBBR sewage treatment and the using method thereof, the formula and the preparation process parameters of the filler for MBBR sewage treatment are strictly controlled, active carbon, starch and gelatin materials are added in the raw materials of the filler as bioactive additives, so that the prepared filler can promote the growth and the reproduction of microorganisms, the filler grid plate adopts a material with small smooth adsorbability, the blockage of the filler on a grid can be effectively reduced, the attachment rate of sludge is reduced, the normal operation of the filler and the sludge on the whole domestic sewage treatment system is effectively prevented, the arrangement of an air inlet pipeline and the distribution of aeration heads in a pond are improved by the design of the aeration heads through the calculation of hydraulic characteristics of the pond shape, the degree of nuts of rubber pads fixed on each aeration head is adjusted according to the actual aeration condition, the aeration quantity of a single aeration head is adjusted, and perforated aeration pipes can be adopted, the four sides and four corners of the pool are convenient to be uniformly distributed, the energy consumption can be reduced, and the economic benefit of MBBR sewage treatment is improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. the utility model provides a filler for MBBR sewage treatment which characterized in that: the raw materials are as follows according to the mass portion: 50-70 parts of polyethylene, 30-50 parts of polypropylene, 10-20 parts of polyurethane foam, 20-30 parts of modified polyethylene, 5-10 parts of modified polypropylene, 5-10 parts of activated carbon, 7-8 parts of starch and 3-5 parts of gelatin.
2. The filler for MBBR sewage treatment according to claim 1, wherein: the modified polyethylene comprises chlorinated polyethylene, chlorosulfonated polyethylene, cross-linked polyethylene and blended modified polyethylene, wherein the mixing ratio of the chlorinated polyethylene, the chlorosulfonated polyethylene, the cross-linked polyethylene and the blended modified polyethylene is 2: 1: 2: 1;
the chlorinated polyethylene has a chlorine content higher than 40%; the chlorosulfonated polyethylene is prepared by chlorinating and chlorosulfonating polyethylene by a phase suspension method; the crosslinked polyethylene is a high molecular polymer prepared by any one of silane crosslinking, high-energy radiation crosslinking, peroxide crosslinking and ultraviolet irradiation crosslinking; the blending modified polyethylene is any one of a HDPE/LDPE blending system, a PE/EVA blending system, a PE/elastomer blending system, a PE/PP/POE blending system and a PE/PS/SBS blending system.
3. The filler for MBBR sewage treatment according to claim 1, wherein: the modified polyethylene is a modified polypropylene material obtained by mixing polypropylene resin, a modifier, an auxiliary agent, a filler and a pigment component and extruding and granulating in a screw extruder;
The polypropylene resin, the modifier, the auxiliary agent, the filler and the pigment are mixed according to the following mass percentage: 50-60% of polypropylene resin, 10-20% of modifier, 5-10% of auxiliary agent, 10-20% of filler and 1-3% of pigment.
4. the filler for MBBR sewage treatment according to claim 1, wherein: the polyethylene, the polypropylene, the polyurethane foam, the modified polyethylene, the modified polypropylene, the activated carbon, the starch and the gelatin are uniformly mixed according to parts by mass, extruded by a screw extruder and subjected to injection molding to prepare the MBBR sewage treatment filler;
the filler for MBBR sewage treatment is cylindrical granular substance, and the size of the carrier of the filler for MBBR sewage treatment is 12 x 8 mm.
5. A method of using the MBBR wastewater treatment packing of claim 1, characterized in that: the method comprises the following steps:
s1: manufacturing a filler grid plate, connecting and splicing grid bars into grid blocks in groups, and then installing the grid blocks on a supporting surface in a block mode, wherein the width of each block is smaller than the diameter of a manhole so that the grid blocks can be fed into a tower from the manhole, and the grid bars need to be designed in a segmented mode when the diameter of the tower is larger;
s2: selecting a material with small smooth adsorbability, and enlarging the gap on the premise of ensuring that the filler can be trapped, so that the filler is not easily attached by suspended substances;
S3: growing the biological film in a filler carrier, wherein the carrier freely moves along with water flow in a reactor;
S4: in an aerobic reactor, the carriers are pushed to move by aeration; moving the carrier in the anaerobic reactor by mechanical agitation;
S5: the filler grating plate is arranged at the outlet of the reactor and used for filtering the filler to prevent the loss of the filler in the reactor;
S6: the reactor in cuboid shape is divided into 2-4 grids along the length direction of the pool by partition boards, the water flow is in plug flow state in the reactor, and the water flow is in complete mixing state in each grid under the action of aeration fluidization;
S7: perforating one side of the reactor, aerating the perforated aeration pipe at one side to make the filler circularly flow in the tank, and arranging a microporous aeration head at the bottom of the reactor with a cylindrical structure;
S8: the bottom of the reactor is additionally provided with a stirring device, so that the reactor is conveniently and flexibly applied to an anoxic state for use;
S9: in order to prevent the air stripping effect and the volatilization effect brought by aeration, a cover is added above the reactor for use.
6. The use method of the filler for MBBR sewage treatment according to claim 5, which is characterized in that: the filler grid plate manufactured in the step S1 consists of two sections and sixteen grid type support plates, and the void ratio is 90-95%;
in the step S1, grid plates made of ceramic material are selected, and the spacing between the grid plates is in the range of 3-10 cm.
7. the use method of the filler for MBBR sewage treatment according to claim 5, which is characterized in that: in the step S4, the DO concentration in the aerobic reactor is not lower than 2mg/L, the pH value is 6.5-7.5, and the liquid temperature in the aerobic reactor is 20-30 ℃;
in the step S4, the volume load of the anaerobic reactor reaches 10-18kgCODm3.d, the height-diameter ratio of the reactor is 4-8, and the height of the reactor is not lower than 20 m.
8. the use method of the filler for MBBR sewage treatment according to claim 5, which is characterized in that: the number of layers of the packing grid plates at the outlet position of the reactor in the step S5 is not less than two, and a sealing structure is arranged at the connecting position of the adjacent packing grid plates for packaging the connecting position.
9. the use method of the filler for MBBR sewage treatment according to claim 5, which is characterized in that: when the aeration heads are designed in the step S7, the arrangement of air inlet pipelines is improved and the distribution of the aeration heads in the tank is optimized by calculating the hydraulic characteristics of the tank type, the tightness degree of nuts for fastening rubber pads on each aeration head is adjusted according to the actual aeration condition, the aeration amount of a single aeration head is adjusted, and perforated aeration pipes can be adopted, so that the air inlets on the four sides and the four corners of the tank are uniformly distributed.
10. the use method of the filler for MBBR sewage treatment according to claim 5, which is characterized in that: the stirring device adopted in the step S8 is a CBY21 type paddle opposite side stretching type stirring device, the horizontal deflection angle of the stirring device is 15-20 degrees, and the downward deflection angle is 1-5 degrees.
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| CN201910829291.8A CN110563128A (en) | 2019-09-03 | 2019-09-03 | MBBR (moving bed biofilm reactor) sewage treatment filler and using method thereof |
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| CN201910829291.8A CN110563128A (en) | 2019-09-03 | 2019-09-03 | MBBR (moving bed biofilm reactor) sewage treatment filler and using method thereof |
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| CN110563128A true CN110563128A (en) | 2019-12-13 |
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Cited By (1)
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| CN114536584A (en) * | 2022-01-28 | 2022-05-27 | 青岛思普润水处理股份有限公司 | Moving bed biofilm suspension carrier for sewage treatment and preparation method thereof |
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Application publication date: 20191213 |