CN102491588A - Method and device for sewage treatment - Google Patents
Method and device for sewage treatment Download PDFInfo
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- CN102491588A CN102491588A CN2011104007970A CN201110400797A CN102491588A CN 102491588 A CN102491588 A CN 102491588A CN 2011104007970 A CN2011104007970 A CN 2011104007970A CN 201110400797 A CN201110400797 A CN 201110400797A CN 102491588 A CN102491588 A CN 102491588A
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Abstract
The invention relates to a method and a device for sewage treatment, and relates to the field of waste water treatment. The invention aims to improve a denitrification effect of secondary effluent of a sewage treatment plant and reduce operating energy consumption. The method comprises the following steps of: introducing sewage into an ozone catalytic oxidation tower to perform catalytic oxidation; introducing water discharged from the ozone catalytic oxidation tower into an anoxia biofilter; and introducing the water treated by the anoxia biofilter into an aerobic biofilter, wherein the injected water is subjected to the degradation of concentration of organic matters and the nitration of ammonia nitrogen by a biomembrane grown on the surface of a porous light filler inside the aerobic biofilter, so that the concentration of the organic matters in the water reaches an effluent discharge index. The invention also provides a device for realizing the method. The device comprises two biofilters, a high-pressure fan and an ozone catalytic oxidation tower. By the method and the device, denitrification can be realized effectively, and secondary pollution can be avoided.
Description
Technical field
The present invention relates to chemical field, especially design the method and the device thereof of a kind of sewage disposal technology, particularly a kind of WWT.
Background technology
BAF (biological aerated filter) is called for short BAF; Be the eighties in 20th century not the beginning of the nineties on the basis of common biological filter; And use for reference water-feeding leaching pool technology and the sewage treatment technique developed; Be used for the tertiary treatment of sewage at first, after develop into and directly be used for second-stage treatment.From the eighties after first BAF sewage work built up in Europe; BAF is widely popular in developed countries such as American-European and Japan; Existing in the world a few days ago hundreds of many big and small sewage works have adopted this technology, have embodied compound, the integrated development trend of sewage treatment process.
BAF has the effect of removing SS, COD, BOD, nitrated, dechlorination dephosphorization, removing AOX (objectionable impurities); Integrate bio-oxidation and hold back suspended solids; Saved follow-up secondary sedimentation basins, treatment process is simplified.In addition, biological aerated filter process organism volumetric loading is high, hydraulic load is big, hydraulic detention time is short, required initial cost is few, energy consumption and running cost are low, and this technology effluent quality is better simultaneously.
The nineties in 20th century, China begins to carry out the development research and the application of BAF, aspect advanced treatment of wastewater, also except that minority colleges and universities and research institution have carried out some laboratory studyes and lab scale research, does not also have the heavy construction application example; In the test of denitrogenation dephosphorizing, often need add carbon source to satisfy the needs of denitrogenation.The carbon source of adding has improved the operation cost of WWT on the one hand, also brings secondary pollution simultaneously.
Catalytic ozonation belongs to a kind of of high-level oxidation technology, has to remove that pollutent is effective, non-secondary pollution, can difficult biochemical larger molecular organics be become and be prone to biochemical small-molecule substance, is prone to advantages such as application aborning.The catalytic ozonation technology all is widely used in drinking water treatment, high concentration organic sewage treatment project.But, owing to only utilize catalytic ozonation to dispose of sewage, the direct mineralising of organism both had been not easy to realize that running cost and power consumption are high too, therefore be not suitable for advanced treatment of wastewater.
Summary of the invention
To the defective that exists in the above-mentioned prior art, technical problem to be solved by this invention provide a kind of running cost and operation energy consumption low, can effectively avoid the method and the device thereof of the WWT of secondary pollution.
In order to solve the problems of the technologies described above; The invention provides a kind of method of WWT; Comprise that one is introduced the step that the catalytic ozonation tower carries out catalyzed oxidation with sewage; In the catalytic ozonation tower, utilize the ozone of inner catalyzer of catalytic ozonation tower and feeding that the water body of introducing is carried out catalytic oxidation treatment, also comprise a step with the water introducing anoxic biological filter of catalytic ozonation tower discharge; In the anoxic biological filter; Utilize the microbial film of the porous light filling surface growth of inside, anoxic biological filter that the water that injects is carried out the denitrification processing, also comprise a step, in aerobic biofilter the water introducing aerobic biofilter after the processing of anoxic biological filter; Utilize the microbial film of the inner porous light filling surface growth of aerobic biofilter that the water that injects is carried out organic concentration degraded and ammonia nitrogen nitration treatment, make the organic concentration in the water body reach the water outlet discharge index.
Further, utilize blower fan in aerobic biofilter, to import pressurized air.
Further, the portion water after the processing is passed through nitrification liquid reflux pump blowback anoxic biological filter in the aerobic biofilter.
Further, the reflux ratio of the water body that discharged of aerobic biofilter water outlet is between 300% ~ 400%.
Further, sewage introduced in the step that the catalytic ozonation tower carries out catalyzed oxidation at one, sewage is through behind the catalyzed oxidation, the ratio of the BOD of water body and COD more than or equal to 0.35.
Further, the nitrogen content through the water of discharging after the aerobic biofilter processing is that total nitrogen is less than 1.5mg/L.
Further, the organic concentration through the water of discharging after the aerobic biofilter processing is that the COD value is less than 20 mg/L.
The present invention also provides a kind of waste disposal plant of realizing aforesaid method; Comprise a catalytic ozonation tower; Also comprise an anoxic biological filter and an aerobic biofilter, the lower end of described catalytic ozonation tower is provided with a sewage inlet, and the upper end of described catalytic ozonation tower is provided with a water outlet; The lower end of described anoxic biological filter is provided with one first water inlet pipe; The upper end of described anoxic biological filter is provided with one first rising pipe, and the water outlet of described first water inlet pipe and described catalytic ozonation tower is connected, and the lower end of described aerobic biofilter is provided with one second water inlet pipe; The upper end of described aerobic biofilter is provided with one second rising pipe, and described second water inlet pipe and described first rising pipe are connected.
Further, the lower wall of described aerobic biofilter is provided with one the 3rd back flushing tracheae, and described the 3rd back flushing tracheae is connected with one first blower fan.
Further, described anoxic biological filter is made up of one first pond body, is provided with one first buffering water distributing area in the inboard bottom of the described first pond body; A sidewall of the described first buffering water distributing area is provided with described first water inlet pipe; The upper end of the described first buffering water distributing area is provided with one first filtrate back up pad, is provided with at least two first filters in the described first filtrate back up pad, and described first filter is to extending below; The upper end of the described first filtrate back up pad is provided with one first supporting layer; Be provided with filler in described first supporting layer, the upper end of described first supporting layer is provided with one first filter material layer, is filled with filtrate in described first filter material layer; The upper end of described first filter material layer is provided with one first exhalant region; The periphery of described first exhalant region is provided with first grid that annular is netted, and the grid face of described first grid is intilted inclined-plane from top to bottom, and the arranged outside of described first grid has an annular first water outlet weir plate; The upper end of described first water outlet weir plate and described first grid joins; Be provided with one first sludge sump between described first water outlet weir plate and described first grid, the bottom of described first sludge sump is provided with at least one first shore pipe, and the top of described first exhalant region also is provided with annular first stabilier; Described first stabilier is arranged on the inboard of described first grid; Be provided with the gap between described first stabilier and described first grid, the lower edge of described first stabilier is lower than the height of described first grid, and the upper limb of described first stabilier is higher than the height of described first grid; The periphery of the described first water outlet weir plate is provided with annular first effluent trough; The bottom of described first effluent trough is provided with at least one described first rising pipe, and described first rising pipe is provided with one first back flushing water pipe, and described first back flushing water pipe and described first water inlet pipe are connected.
Further, the outer side wall one of described first water outlet weir plate and described first sludge sump constitutes.
Further, described aerobic biofilter is made up of one second pond body, is provided with one second buffering water distributing area in the inboard bottom of the described second pond body; A sidewall of the described second buffering water distributing area is provided with described second water inlet pipe; The upper end of the described second buffering water distributing area is provided with one second filtrate back up pad, is provided with at least two second filters in the described second filtrate back up pad, and described second filter is to extending below; The upper end of the described second filtrate back up pad is provided with one second supporting layer; Be provided with an aeration tube in described second supporting layer, described aeration tube is connected with one second blower fan, is provided with filler in described second supporting layer; The upper end of described second supporting layer is provided with one second filter material layer; Be filled with filtrate in described second filter material layer, the upper end of described second filter material layer is provided with one second exhalant region, and the periphery of described second exhalant region is provided with second grid that annular is netted; The grid face of described second grid is intilted inclined-plane from top to bottom; The arranged outside of described second grid has an annular second water outlet weir plate, and the upper end of described second water outlet weir plate and described second grid joins, and is provided with one second sludge sump between described second water outlet weir plate and described second grid; The bottom of described second sludge sump is provided with at least one second shore pipe; The top of described second exhalant region also is provided with annular second stabilier, and described second stabilier is arranged on the inboard of described second grid, is provided with the gap between described second stabilier and described second grid; The lower edge of described second stabilier is lower than the height of described second grid; The upper limb of described second stabilier is higher than the height of described second grid, and the periphery of the described second water outlet weir plate is provided with annular second effluent trough, and the bottom of described second effluent trough is provided with at least one described second rising pipe; Described second rising pipe is provided with one second back flushing water pipe, and described second back flushing water pipe and described second water inlet pipe are connected.
Further, described second rising pipe also connects a nitrification liquid return line, and first water inlet pipe of described nitrification liquid return line and described anoxic biological filter is connected, and is provided with a nitrification liquid reflux pump in the described nitrification liquid return line.
Further, the outer side wall one of described second water outlet weir plate and described second sludge sump constitutes.
Further, a sidewall of described buffering water distributing area is provided with one the 3rd back flushing tracheae, and described the 3rd back flushing tracheae is connected with a blower fan.
Concrete, described first blower fan and described second blower fan can be same blower fans.
Concrete, described aeration tube is provided with aeration head, and said aeration head is towards the top.
Concrete, the porous light filling surface growth in the said anoxic biological filter is useful on the denitrifying microbial film of water body denitrification.
Concrete, the porous light filling surface growth in the said aerobic biofilter is useful on degraded of water body organism concentration and the nitrated microbial film of ammonia nitrogen.
Principle of work of the present invention is: the catalytic ozonation tower is introduced the water body of outside source of sewage through its water-in; And utilizing the ozone of its inner catalyzer and feeding that the water body of introducing is carried out catalytic oxidation treatment, discharge water body through its water outlet the back that disposes; Wherein, catalytic oxidation treatment is meant the BOD concentration of utilizing ozone and catalyzer to improve water body, and the BOD that makes water body reaches preset value with the ratio of COD, and to promote the biodegradability of water body, this preset value preestablishes before processing; The water body of being discharged by the catalytic ozonation tower mixes injection anoxic biological filter, back with the water body of nitrification liquid reflux pump blowback in the water inlet of anoxic biological filter; The anoxic biological filter utilizes the microbial film of its inner porous light filling surface growth that the water body that injects is carried out denitrification and handles, and the back that disposes enters aerobic biofilter through its water outlet with water body; Wherein, Denitrification is handled and is meant under the situation of no air injection anoxic biological filter; Mikrobe in the anoxic biological filter in the microbial film utilizes the nitric nitrogen in the water body to produce the denitrification denitrogenation reaction under anoxic condition; Make the intravital nitrogen content of water reach preset value, this preset value preestablishes before processing; Aerobic biofilter utilizes the microbial film of its inner porous light filling surface growth that the water body that injects is carried out organic concentration degraded and ammonia nitrogen nitration treatment; Make the organic concentration in the water body reach preset value; Reaching the water outlet discharge index, and make the ammonia nitrogen in the water body be oxidized to nitric nitrogen, the water body after disposing divides two-way to discharge through its water outlet after covering its effluent weir; A route nitrification liquid reflux pump blowback anoxic biological filter wherein, another road is disposed to the outside;
The present invention compares with prior art, and its technical progress is significant.Waste disposal plant provided by the invention and treatment process thereof utilize the catalytic ozonation tower that water body is carried out catalytic oxidation treatment earlier, can improve the ratio of labile organic compound in the sewage; When being used for the advanced treatment of secondary effluent, can not add or add less the required carbon source of biological denitrificaion, can effectively reduce running cost; Avoid because of adding the secondary pollution that carbon source causes; Its operation energy consumption is also lower, has the advantages that the water outlet total nitrogen concentration is low, organic concentration is low, and its water outlet can reach the three types of water quality in the face of land; Can direct reuse, and excellent characteristics such as the facility floor space is little, activated sludge concentration is high, excess sludge production is low.
Description of drawings
Fig. 1 is the schematic flow sheet of the method for a kind of WWT of the present invention;
Fig. 2 is the structural representation of the anoxic biological filter in a kind of waste disposal plant of the present invention;
Fig. 3 is the structural representation of the aerobic biofilter in a kind of waste disposal plant of the present invention.
Embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
Embodiment 1
As shown in Figure 1; The method of a kind of WWT provided by the present invention; Comprise that one is introduced the step that catalytic ozonation tower 100 carries out catalyzed oxidation with sewage; In catalytic ozonation tower 100, utilize the catalyzer of catalytic ozonation tower 100 inside and the ozone of feeding that the water body of introducing is carried out catalytic oxidation treatment, also comprise a step with the water introducing anoxic biological filter 200 of catalytic ozonation tower 100 discharges; In anoxic biological filter 200; Utilize the microbial film of the porous light filling surfaces growth of 200 inside, anoxic biological filter that the water that injects is carried out the denitrification processing, also comprise a step, in aerobic biofilter 300 the water introducing aerobic biofilter 300 after 200 processing of anoxic biological filter; The microbial film that utilizes aerobic biofilter 300 inner porous light filling surfaces to grow carries out organic concentration degraded and ammonia nitrogen nitration treatment to the water that injects, and makes the organic concentration in the water body reach the water outlet discharge index.
Further, utilize blower fan 400 in aerobic biofilter 300, to import pressurized air.
Further, the portion water after the processing is passed through nitrification liquid reflux pump 218 blowback anoxic biological filters 200 in the aerobic biofilter 300.
Further, the reflux ratio of the water body that discharged of aerobic biofilter 300 water outlets is between 300% ~ 400%.
Further, at one sewage is introduced catalytic ozonation tower 100 and carry out in the step of catalyzed oxidation, sewage is through behind the catalyzed oxidation, the ratio of the BOD of water body and COD more than or equal to 0.35.
Further, the nitrogen content of handling the water that discharges the back through aerobic biofilter 300 is that total nitrogen is less than 1.5mg/L.
Further, the organic concentration of handling the water that discharges the back through aerobic biofilter 300 is that the COD value is less than 20 mg/L.
Like Fig. 1, shown in Figure 2; The present invention also provides a kind of waste disposal plant of realizing aforesaid method; Comprise a catalytic ozonation tower 100; Also comprise an anoxic biological filter 200 and an aerobic biofilter 300, the lower end of described catalytic ozonation tower 100 is provided with a sewage inlet, and the upper end of described catalytic ozonation tower 100 is provided with a water outlet; The lower end of described anoxic biological filter 200 is provided with one first water inlet pipe 6; The upper end of described anoxic biological filter 200 is provided with one first rising pipe 14, and the water outlet of described first water inlet pipe 6 and described catalytic ozonation tower 100 is connected, and the lower end of described aerobic biofilter 300 is provided with one second water inlet pipe 26; The upper end of described aerobic biofilter 300 is provided with one second rising pipe 214, and described second water inlet pipe 26 is connected with described first rising pipe 14.
Concrete, the portion water after said aerobic biofilter 300 is handled passes to the outside through second water outlet;
Further, the lower wall of described aerobic biofilter 300 is provided with one the 3rd back flushing tracheae 219, and described the 3rd back flushing tracheae 219 is connected with a blower fan 400.
Further; Described anoxic biological filter 200 is made up of one first pond body; Be provided with one first buffering water distributing area 1 in the inboard bottom of the described first pond body, a sidewall of the described first buffering water distributing area 1 is provided with described first water inlet pipe 6, and the upper end of the described first buffering water distributing area 1 is provided with one first filtrate back up pad 3; Be provided with at least two first filters 2 in the described first filtrate back up pad 3; Described first filter 2 is to extending below, and the upper end of the described first filtrate back up pad 3 is provided with one first supporting layer 4, is provided with filler in described first supporting layer 4; The upper end of described first supporting layer 4 is provided with one first filter material layer 5; Be filled with filtrate in described first filter material layer 5, the upper end of described first filter material layer 5 is provided with one first exhalant region 15, and the periphery of described first exhalant region 15 is provided with first grid 12 that annular is netted; The grid face of described first grid 12 is intilted inclined-plane from top to bottom; The arranged outside of described first grid 12 has an annular first water outlet weir plate 11, and the upper end of described first water outlet weir plate 11 and described first grid 12 joins, and is provided with one first sludge sump 9 between described first water outlet weir plate 11 and described first grid 12; The bottom of described first sludge sump 9 is provided with at least one first shore pipe 13; The top of described first exhalant region 15 also is provided with an annular first stabilier 8, and described first stabilier 8 is arranged on the inboard of described first grid 12, is provided with the gap between described first stabilier 8 and described first grid 12; The lower edge of described first stabilier 8 is lower than the height of described first grid 12; The upper limb of described first stabilier 8 is higher than the height of described first grid 12, and the periphery of the described first water outlet weir plate 11 is provided with an annular first effluent trough 10, and the bottom of described first effluent trough 10 is provided with at least one described first rising pipe 14; Described first rising pipe 14 is provided with one first back flushing water pipe 7, and the described first back flushing water pipe 7 is connected with described first water inlet pipe 6.
Further; Described aerobic biofilter 300 is made up of one second pond body; Be provided with one second buffering water distributing area 21 in the inboard bottom of the described second pond body, a sidewall of the described second buffering water distributing area 21 is provided with described second water inlet pipe 26, and the upper end of the described second buffering water distributing area 21 is provided with one second filtrate back up pad 23; Be provided with at least two second filters 22 in the described second filtrate back up pad 23; Described second filter 22 is to extending below, and the upper end of the described second filtrate back up pad 23 is provided with one second supporting layer 24, is provided with an aeration tube 217 in described second supporting layer 24; Described aeration tube 217 is connected with a blower fan 400; Be provided with filler in described second supporting layer 24, the upper end of described second supporting layer 24 is provided with one second filter material layer, is filled with filtrate in described second filter material layer; The upper end of described second filter material layer is provided with one second exhalant region 215; The periphery of described second exhalant region 215 is provided with second grid 212 that annular is netted, and the grid face of described second grid 212 is intilted inclined-plane from top to bottom, and the arranged outside of described second grid 212 has an annular second water outlet weir plate 211; The upper end of described second water outlet weir plate 211 and described second grid 212 joins; Be provided with one second sludge sump 29 between described second water outlet weir plate 211 and described second grid 212, the bottom of described second sludge sump 29 is provided with at least one second shore pipe 213, and the top of described second exhalant region 215 also is provided with an annular second stabilier 28; Described second stabilier 28 is arranged on the inboard of described second grid 212; Be provided with the gap between described second stabilier 28 and described second grid 212, the lower edge of described second stabilier 28 is lower than the height of described second grid 212, and the upper limb of described second stabilier 28 is higher than the height of described second grid 212; The periphery of the described second water outlet weir plate 211 is provided with an annular second effluent trough 210; The bottom of described second effluent trough 210 is provided with at least one described second rising pipe 214, and described second rising pipe 214 is provided with one second back flushing water pipe 27, and the described second back flushing water pipe 27 is connected with described second water inlet pipe 26.
Further; Described second rising pipe 214 also connects a nitrification liquid return line 216; First water inlet pipe 6 of described nitrification liquid return line 216 and described anoxic biological filter 200 is connected, and is provided with a nitrification liquid reflux pump 218 in the described nitrification liquid return line 216.
Further, a sidewall of the described second buffering water distributing area 21 is provided with the 3rd recoil tracheae 219, and described the 3rd recoil tracheae 219 is connected with blower fan 400.
Concrete, the filter material surface growth in the said anoxic biological filter 200 is useful on the denitrifying microbial film of water body denitrification.
Concrete, the filter material surface growth in the said aerobic biofilter 300 is useful on degraded of water body organism concentration and the nitrated microbial film of ammonia nitrogen.
In the embodiment of the invention, the catalyzer in the said catalytic ozonation tower 100 is manganese, copper oxide, reaches the catalyst aid that is mixed by potassium, magnesium, ba oxide; Growth has denitrifying bacterium, said denitrifying bacterium to comprise Rhodopseudomonas, denitrification Bacillaceae, spiral Pseudomonas and achromobacter etc. on the microbial film of growing on the porous light filler in the said anoxic biological filter 200; Growth has the bacterium of Alkaligenes, bacillus, Flavobacterium and moving glue Bacillaceae on the microbial film of growing on the porous light filler in the said aerobic biofilter 300.
Principle of work of the present invention is: catalytic ozonation tower 100 is introduced the water body of outside source of sewage through its water-in; And utilizing the ozone of its inner catalyzer and feeding that the water body of introducing is carried out catalytic oxidation treatment, discharge water body through its water outlet the back that disposes; Wherein, Catalytic oxidation treatment is meant BOD (biochemical oxygen demand) concentration of utilizing ozone and catalyzer to improve water body; Make the BOD (biochemical oxygen demand) of water body and the ratio of COD (COD) reach preset value, to promote the biodegradability of water body, this preset value preestablishes before processing; The water body of being discharged by catalytic ozonation tower 100 mixes injection anoxic biological filter, back 200 with the water body of nitrification liquid reflux pump 218 blowbacks in the water inlet of anoxic biological filter 200; Anoxic biological filter 200 utilizes the microbial film of its inner porous light filling surface growth that the water body that injects is carried out denitrification and handles, and the back that disposes enters aerobic biofilter 300 through its water outlet with water body; Wherein, Denitrification is handled and is meant under the situation of no air injection anoxic biological filter 200; Mikrobe in the anoxic biological filter 200 in the microbial film utilizes the nitric nitrogen in the water body to produce the denitrification denitrogenation reaction under anoxic condition; Make the intravital nitrogen content of water reach preset value, this preset value preestablishes before processing, and its value is that total nitrogen is less than 1.5mg/L; Aerobic biofilter 300 utilizes the microbial film of its inner porous light filling surface growth that the water body that injects is carried out organic concentration degraded and ammonia nitrogen nitration treatment; Make the organic concentration in the water body reach preset value; Reaching the water outlet discharge index, and make the ammonia nitrogen in the water body be oxidized to nitric nitrogen, the water body after disposing covers its water outlet weir plate 211 backs and divides two-way to discharge through its water outlet; A route nitrification liquid reflux pump 218 blowback anoxic biological filters 200 wherein, another road is disposed to the outside; Wherein, The reflux ratio of the water body that aerobic biofilter 300 water outlets are discharged is between 300% ~ 400%; Being in the water body that discharged of aerobic biofilter 300 water outlets, is to be disposed to 3 ~ 4 times of the outside water yield by the water yield of nitrification liquid reflux pump 218 blowback anoxic biological filters 200; Wherein, the organic concentration preset value in the water body preestablishes before processing, and its preset value is that the COD value is less than 20 mg/L; Wherein, when the water body of 300 pairs of injections of aerobic biofilter carries out the organic concentration degradation treatment, the aeration head input pressurized air that utilizes high pressure positive blower 400 in the supporting layer of aerobic biofilter 300, to bury underground.
In the embodiment of the invention, the preset value of the ratio of BOD of water body (biochemical oxygen demand) and COD (COD) is more than or equal to 0.35, and the BOD of water body also can be set to more than or equal to 0.3 with the preset value of the ratio of COD in the practical application.
In the embodiment of the invention, utilize ozone and catalyzer to improve BOD (biochemical oxygen demand) concentration of water body, reach the denitrification denitrogenation reaction under the anoxic condition, organic concentration degraded and ammonia nitrogen nitration treatment under the good oxygen condition are prior art.
In the embodiment of the invention, the principle of work of said anoxic biological filter 200 is following:
Under the effect of nitrification liquid reflux pump 218; Nitrification liquid mixes the back and gets into anoxic biological filter 200 with source sewage; Water body flows through first filter material layer 5 from bottom to up, under the effect of filter material surface denitrifying bacterium, carries out anti-nitration reaction, and water, mud reach the partially porous light filler of being brought into by water body and is able to separate at exhalant region; Porous light filler after the separation falls the filter tank after rise according to deadweight; The microbial film that comes off on a small quantity in the water is in sloping plate deposition district and water sepn, because the proportion of mud is greater than the proportion of water, mud is precipitated in first sludge sump 9 through netted fine fack; Enter outside sludge treatment equipment through first shore pipe 13 again, water covers the first water outlet weir plate, 11 backs and enters aerobic biofilter 300 from first rising pipe 14;
In the embodiment of the invention, the principle of work of said aerobic biofilter 300 is following:
Utilize high pressure positive blower 400 to aerobic biofilter 300 input pressurized air; The aeration head that pressurized air is provided with on aeration tube 217 gets into water body; Sewage carries out the aerobic biochemical reaction under the filter material surface microbial process, the pollutent in the water is able to degraded, and water, the microbial film that comes off, gas and the partially porous light filler of being brought into by water body separate at exhalant region; Porous light filler after the separation falls the pond body after rise according to deadweight; Gas drains into atmosphere, and mud further separates with coprecipitation mode with water, and mud is precipitated in second sludge sump 29 through netted fine fack; Enter outside sludge treatment equipment through second shore pipe 213 again; Water then covers the second water outlet weir plate, 211 backs and discharges from second rising pipe 214, and most of water body that second rising pipe 214 is discharged is participated in circulation once more through the water-in of nitrification liquid return line 216, nitrification liquid reflux pump 218 blowback anoxic biological filters 200, and all the other small portion water bodys drain into the outside.
Claims (15)
1. the method for a WWT; It is characterized in that: comprise that one is introduced the step that the catalytic ozonation tower carries out catalyzed oxidation with sewage; In the catalytic ozonation tower; Utilize the ozone of inner catalyzer of catalytic ozonation tower and feeding that the water body of introducing is carried out catalytic oxidation treatment; Also comprise a step, in the anoxic biological filter, utilize the microbial film of the inner porous light filling surface growth in anoxic biological filter that the water that injects is carried out the denitrification processing the water introducing anoxic biological filter of catalytic ozonation tower discharge; Also comprise a step of the water after the processing of anoxic biological filter being introduced aerobic biofilter; In aerobic biofilter, utilize the microbial film of the inner porous light filling surface growth of aerobic biofilter that the water that injects is carried out organic concentration degraded and ammonia nitrogen nitration treatment, make the organic concentration in the water body reach the water outlet discharge index.
2. the method for a kind of WWT as claimed in claim 1 is characterized in that: utilize blower fan in aerobic biofilter, to import pressurized air.
3. the method for a kind of WWT as claimed in claim 1 is characterized in that: the portion water after handling in the aerobic biofilter is through nitrification liquid reflux pump blowback anoxic biological filter.
4. the method for a kind of WWT according to claim 3, it is characterized in that: the reflux ratio of the water body that the aerobic biofilter water outlet is discharged is between 300% ~ 400%.
5. the method for a kind of WWT according to claim 1 is characterized in that: sewage introduced in the step that the catalytic ozonation tower carries out catalyzed oxidation at one, sewage is through behind the catalyzed oxidation, the ratio of the BOD of water body and COD more than or equal to 0.35.
6. the method for a kind of WWT according to claim 1 is characterized in that: the nitrogen content of handling the water of back discharging through aerobic biofilter is that total nitrogen is less than 1.5mg/L.
7. the method for a kind of WWT according to claim 1 is characterized in that: the organic concentration of handling the water of back discharging through aerobic biofilter is that the COD value is less than 20 mg/L.
8. realize the waste disposal plant of the said method of claim 1; Comprise a catalytic ozonation tower; It is characterized in that: also comprise an anoxic biological filter and an aerobic biofilter, the lower end of described catalytic ozonation tower is provided with a sewage inlet, and the upper end of described catalytic ozonation tower is provided with a water outlet; The lower end of described anoxic biological filter is provided with one first water inlet pipe; The upper end of described anoxic biological filter is provided with one first rising pipe, and the water outlet of described first water inlet pipe and described catalytic ozonation tower is connected, and the lower end of described aerobic biofilter is provided with one second water inlet pipe; The upper end of described aerobic biofilter is provided with one second rising pipe, and described second water inlet pipe and described first rising pipe are connected.
9. a kind of waste disposal plant as claimed in claim 8 is characterized in that: the lower wall of described aerobic biofilter is provided with one the 3rd back flushing tracheae, and described the 3rd back flushing tracheae is connected with one first blower fan.
10. a kind of waste disposal plant as claimed in claim 8; It is characterized in that: described anoxic biological filter is made up of one first pond body; Be provided with one first buffering water distributing area in the inboard bottom of the described first pond body, a sidewall of the described first buffering water distributing area is provided with described first water inlet pipe, and the upper end of the described first buffering water distributing area is provided with one first filtrate back up pad; Be provided with at least two first filters in the described first filtrate back up pad; Described first filter is to extending below, and the upper end of the described first filtrate back up pad is provided with one first supporting layer, is provided with filler in described first supporting layer; The upper end of described first supporting layer is provided with one first filter material layer; Be filled with filtrate in described first filter material layer, the upper end of described first filter material layer is provided with one first exhalant region, and the periphery of described first exhalant region is provided with first grid that annular is netted; The grid face of described first grid is intilted inclined-plane from top to bottom; The arranged outside of described first grid has an annular first water outlet weir plate, and the upper end of described first water outlet weir plate and described first grid joins, and is provided with one first sludge sump between described first water outlet weir plate and described first grid; The bottom of described first sludge sump is provided with at least one first shore pipe; The top of described first exhalant region also is provided with annular first stabilier, and described first stabilier is arranged on the inboard of described first grid, is provided with the gap between described first stabilier and described first grid; The lower edge of described first stabilier is lower than the height of described first grid; The upper limb of described first stabilier is higher than the height of described first grid, and the periphery of the described first water outlet weir plate is provided with annular first effluent trough, and the bottom of described first effluent trough is provided with at least one described first rising pipe; Described first rising pipe is provided with one first back flushing water pipe, and described first back flushing water pipe and described first water inlet pipe are connected.
11. a kind of waste disposal plant as claimed in claim 10 is characterized in that: the outer side wall one of described first water outlet weir plate and described first sludge sump constitutes.
12. a kind of waste disposal plant as claimed in claim 8 is characterized in that: described aerobic biofilter is made up of one second pond body, is provided with one second buffering water distributing area in the inboard bottom of the described second pond body; A sidewall of the described second buffering water distributing area is provided with described second water inlet pipe; The upper end of the described second buffering water distributing area is provided with one second filtrate back up pad, is provided with at least two second filters in the described second filtrate back up pad, and described second filter is to extending below; The upper end of the described second filtrate back up pad is provided with one second supporting layer; Be provided with an aeration tube in described second supporting layer, described aeration tube is connected with one second blower fan, is provided with filler in described second supporting layer; The upper end of described second supporting layer is provided with one second filter material layer; Be filled with filtrate in described second filter material layer, the upper end of described second filter material layer is provided with one second exhalant region, and the periphery of described second exhalant region is provided with second grid that annular is netted; The grid face of described second grid is intilted inclined-plane from top to bottom; The arranged outside of described second grid has an annular second water outlet weir plate, and the upper end of described second water outlet weir plate and described second grid joins, and is provided with one second sludge sump between described second water outlet weir plate and described second grid; The bottom of described second sludge sump is provided with at least one second shore pipe; The top of described second exhalant region also is provided with annular second stabilier, and described second stabilier is arranged on the inboard of described second grid, is provided with the gap between described second stabilier and described second grid; The lower edge of described second stabilier is lower than the height of described second grid; The upper limb of described second stabilier is higher than the height of described second grid, and the periphery of the described second water outlet weir plate is provided with annular second effluent trough, and the bottom of described second effluent trough is provided with at least one described second rising pipe; Described second rising pipe is provided with one second back flushing water pipe, and described second back flushing water pipe and described second water inlet pipe are connected.
13. a kind of waste disposal plant as claimed in claim 12 is characterized in that: the outer side wall one of described second water outlet weir plate and described second sludge sump constitutes.
14. a kind of waste disposal plant as claimed in claim 12; It is characterized in that: described second rising pipe also connects a nitrification liquid return line; First water inlet pipe of described nitrification liquid return line and described anoxic biological filter is connected, and is provided with a nitrification liquid reflux pump in the described nitrification liquid return line.
15. a kind of waste disposal plant as claimed in claim 12 is characterized in that: a sidewall of described buffering water distributing area is provided with one the 3rd back flushing tracheae, and described the 3rd back flushing tracheae is connected with a blower fan.
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| CN2011104007970A CN102491588A (en) | 2011-12-06 | 2011-12-06 | Method and device for sewage treatment |
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| CN2011104007970A CN102491588A (en) | 2011-12-06 | 2011-12-06 | Method and device for sewage treatment |
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| CN105481177A (en) * | 2015-12-27 | 2016-04-13 | 苏州科环环保科技有限公司 | Low-consumption nitrification and denitrification coal chemical wastewater advanced treatment device |
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| CN105541012A (en) * | 2015-12-27 | 2016-05-04 | 苏州科环环保科技有限公司 | Sewage nitrogen and phosphorus removal device with internal circulating biological aerated filter |
| CN105541011A (en) * | 2015-12-27 | 2016-05-04 | 苏州科环环保科技有限公司 | High nitrogen and phosphorus wastewater overall disposal system with efficient hydrolytic tank |
| CN105481177A (en) * | 2015-12-27 | 2016-04-13 | 苏州科环环保科技有限公司 | Low-consumption nitrification and denitrification coal chemical wastewater advanced treatment device |
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| CN107324614A (en) * | 2017-08-30 | 2017-11-07 | 安徽华骐环保科技股份有限公司 | A kind of mark that carries is to the technique for treating industrial wastewater for being better than the class water quality of earth's surface IV |
| CN107640871A (en) * | 2017-10-24 | 2018-01-30 | 张郁婷 | A kind of raising sewage disposal process |
| CN108585367A (en) * | 2018-05-17 | 2018-09-28 | 哈尔滨工业大学 | A kind of UV ozone combined type aeration biological filter device and the method using device progress sewage disposal |
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| CN114044712A (en) * | 2021-10-18 | 2022-02-15 | 苏州三行建筑景观装饰有限公司 | Complex microbial inoculant, biological organic fertilizer and preparation method of biological organic fertilizer |
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Application publication date: 20120613 |