CN205398229U - Combine A2O method to utilize sewage treatment system of industrial waste for filter material nitrogen and phosphorus removal - Google Patents
Combine A2O method to utilize sewage treatment system of industrial waste for filter material nitrogen and phosphorus removal Download PDFInfo
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Abstract
The utility model discloses a combine A2O method to utilize sewage treatment system of industrial waste for filter material nitrogen and phosphorus removal belongs to denitrification of wastewater dephosphorization field. This system includes the tank, multistage filter material device and reflux unit, and multistage filter material device comprises two filter material boxes of interconnect, and first order filter material box is higher than second level filter material box. First order filter material box left side bottom is equipped with a water inlet, and the top is closed, second level filter material bottom half is equipped with two delivery ports, and the top is the open -type, first order filter material box does from bottom to top in proper order: in supporting layer, the acid and residue filter material layer and water distribution layer, do in proper order from bottom to top in the filter material box of the second level: supporting layer, dehydration aluminium mud filter material layer and water distribution layer, the reflux unit includes backflow pipeline and backward flow tank, and the specific rivers method of operation of this with a system is connected, and being equipped with the backward flow and having improved the denitrification percent, realizes the high -efficient purpose of getting rid of in the sewage nitrogen and phosphorus.
Description
Technical field
The invention belongs to sewage denitrification and dephosphorization field, more particularly, it relates to one is in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing.
Background technology
Along with the pollution problem of developing rapidly of China's economy, life in the countryside and livestock breeding wastewater is day by day serious.The maximum feature of two types sewage is that concentration of nitrogen and phosphorus is high.Along with the increase of wastewater emission amount, the nutrient concentrations in water body constantly raises, and nitrogen, phosphorus are the one of the main reasons causing body eutrophication.Conventional biochemical processing process can effectively reduce the BOD of sewage5And SS, but the nutrients such as simultaneous N, P in sewage can only be removed 10%-20%.Therefore, searching can effectively be used in process life in the countryside and livestock breeding wastewater and denitrification and dephosphorization method more stable, economic, efficient just seem necessary and urgent.
Current China domestic sewage in rural areas and livestock breeding wastewater treatment facility popularity rate are very low, and a part of facility also exists and processes the problem that technique is simple, effect is bad；Although part pollutant removal is better, but its cost of investment is relatively big, operating cost is high or floor space is big.In water process, filtrate is the core of biochemical reaction technology, and the quality of its performance directly affects the efficiency of sewage disposal, reliability and stability.In existing report, some trade waste is widely used in sewage disposal, for instance anthracite, slag, flyash etc..The comprehensive utilization of the side-product produced in water factory, mining industry and metallurgical process in recent years becomes study hotspot, neutralizes residue including dehydration aluminum mud, acid.Dehydration aluminum mud, acid neutralize residue and are respectively from the by-product in the Water treatment of waterworks, produce the residue produced in rutile process, both are containing abundant ferrum and calcium, dehydration aluminum mud is based on ferrum oxide and aluminium oxide, analyze to water pollutant removal aspect, sewage denitrification and dephosphorization is had good effect by dehydration aluminum mud, acid neutralizes residue can reduce the concentration of dissolved organic matter in surface water body, nitrogen and phosphorus, both of which has bigger specific surface area, pollutant in water body have certain absorbability, and chemical composition stablizes non-secondary pollution simultaneously.Single filter material wants to reach higher position reason effect and has to pass through multistep treatment, if the two can be combined as filtering media application in domestic sewage in rural areas and livestock breeding wastewater treatment technology, while the reaction medium of lower price high efficiency is provided, also provide for the processing mode of a kind of new recycling.Meanwhile, in existing denitrification dephosphorization technique, A is utilized2/ O method carries out sewage disposal and obtains good denitrification effect.Therefore, two kinds of filtrates are adopted and in conjunction with A2Sewage is carried out processing the Nitrogen/Phosphorus Removal that can be greatly increased sewage by/O method.
Chinese invention patent, publication number: 10743670A, publication date: on July 1st, 2015, disclose and go out streaming sewage disposal system and method under entering under a kind of employing graded filtering media coordinates.This system includes tank and filtering device, wherein, separated by dividing plate in the middle of filtering device, the top of dividing plate is lower than the top of filtering device, water inlet is arranged on the left side of filtering device near bottom position, and outlet is arranged on the right of dividing plate, on the bottom position of filtering device, water nozzle is arranged on the left side of dividing plate, on the bottom position of filtering device；The left side of filtering device internal partition is followed successively by from bottom to top: supporting layer, the first grating filter material layer and air；The right of filtering device internal partition is followed successively by from bottom to top: supporting layer, the second grating filter material layer and air；The side bottom of tank is connected by pipeline with described water inlet, and this pipeline is provided with peristaltic pump, and the bottom of tank is higher than the top of filtering device.It gives full play to filtrate synergism mechanism, it is achieved efficiently remove the purpose of nitrogen and phosphorus in sewage.This patent is disadvantageous in that, two kinds of graded filtering media combined denitrifications are used in this invention, but denitrogenation dephosphorizing efficiency is still not high.
Chinese invention patent, Authorization Notice No.: CN103395951B, authorized announcement date: 2014.08.13, disclose a kind of system and method utilizing acid to neutralize residue and dehydration aluminum Treatment of Sludge nitrogenous effluent, belong to nitrogenous effluent treatment field.This system includes acid and neutralizes residue device and dehydration aluminum device of sludge, acid neutralizes residue device and is arranged on the top of dehydration aluminum device of sludge, and acid neutralizes the top higher than dehydration aluminum device of sludge, the bottom of residue device, this acid neutralizes the bottom of residue device and the bottom of this dehydration aluminum device of sludge by pipeline communication, and on this pipeline, the position near dehydration aluminum device of sludge is provided with valve；This system also includes tank, and the pipeline that tank neutralizes with described acid and is provided with the first water pump on the pipeline that residue device upper end connects, tank connects with dehydration aluminum device of sludge upper end is provided with the second water pump.The present invention utilizes acid to neutralize residue and dehydration aluminum mud as reaction medium, by constructing two-stage filter tank, implements the alternate run of nitrogenous effluent, it is achieved that the efficient removal of ammonia nitrogen and total nitrogen.Its weak point is: in long running, occurs in that device blockage problem, particularly in dehydration aluminum device of sludge, thus affecting the treatment effect of device.
Chinese invention patent, Authorization Notice No.: CN103449682B, authorized announcement date: on January 7th, 2015, disclose a kind of device and method utilizing industrial solid castoff denitrogenation dephosphorizing, belong to sewage denitrification and dephosphorization field.This device includes further device and secondary device, and further device is horizontally set on the front portion of secondary device, and the bottom of the bottom of further device and secondary device is by pipeline communication, and this pipeline is provided with No. two electromagnetic valves and water pump；Being followed successively by layer of plants, further device reaction filtrate and cobblestone in further device from top to bottom, further device reaction filtrate is the mixture of the dehydration aluminum mud mixture with light calcined magnesia or dehydration aluminum mud and red sand；Secondary device is followed successively by secondary device reaction filtrate and cobblestone from top to bottom, and secondary device reaction filtrate is the mixture that the sour mixture neutralizing residue and light calcined magnesia or acid neutralize residue and red soil spherolite.These apparatus and method give full play to filtrate synergism mechanism, are equipped with rational operation process, it is achieved that floor space is little, operating cost is low, the purpose that in sewage, nitrogen phosphorus efficiency is removed.The weak point of this patent is: this invention gives full play to the synergism mechanism of filtrate, but denitrogenation dephosphorizing efficiency is not efficient.
Summary of the invention
1. to solve the technical problem that
Neutralize for existing acid there will be when residue and dehydration aluminum mud synergism process sewage can not efficient long time stable remove the problem of nitrogen and phosphorus in sewage, the invention provides one in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, and this system takes full advantage of the feature of two kinds of filtrates and device design straggly, causes natural water to fall aeration, and in conjunction with A2/ O method is equipped with the rational methods of operation such as backflow, it is achieved that remove the purpose of nitrogen and phosphorus in sewage more efficiently.
2. technical scheme
For solving the problems referred to above, technical scheme provided by the invention is:
One utilizes trade waste and A2/ O method is in conjunction with the sewage disposal system of denitrogenation dephosphorizing and method, including tank, multistage filtering device and reflux；Multistage filtering device includes first order filtrate casing and second level filtrate casing, reflux includes backflow tank and reflux line, tank, backflow tank, first order filtrate casing are sequentially connected with, the water outlet of first order filtrate casing flows in the filtrate casing of the second level, the bottom of second level filtrate casing is provided with two outlets, one of them is connected with backflow tank, utilize this system be capable of efficient long time stable removal sewage in nitrogen and phosphorus.If it is desired to improve nitrogen phosphorus ligands efficiency further, it is possible to multiple multistage filtering device will be arranged in parallel, and eliminate after-treatment.
Preferably, first order filtrate casing is followed successively by from bottom to top: supporting layer, first order filter material layer and water distribution layer, and the filtrate of first order filter material layer is the mixing that acid neutralizes residue or acid neutralization residue and both dehydration aluminum mud；Water inlet is arranged on the left bottom of first order filtrate casing, and two outlets are arranged on the same At The Height in right flank top of first order filtrate casing, and outlet is for by the sewage discharge in first order filtrate casing to second level filtrate casing.Supporting layer is made up of gravel and cobblestone, is used for carrying first order filter material layer, builds the environment of anaerobic treatment；First order filtrate casing overall structure is simply compact, and floor space is little, it is simple to processing, popularization and application.
Preferably, second level filtrate casing is followed successively by from bottom to top: supporting layer, second level filter material layer and water distribution layer, and the filtrate of second level filter material layer is the mixing that dehydration aluminum mud or acid neutralize residue and both dehydration aluminum mud；Second level filtrate box bottom is respectively equipped with recycling effluent mouth and total outlet, and recycling effluent mouth is to be for further processing by sewage backflow after treatment, removes the Organic substance in sewage, nitrogen and phosphorus further, and total outlet is for the sewage after emission treatment；The pipeline being connected with total outlet is provided with emptying valve, and emptying valve is used for controlling sewage and whether flows out from total outlet.Supporting layer is made up of gravel and cobblestone, is used for carrying first order filter material layer, builds the environment of anaerobic treatment；Second level filtrate casing is similar with first order filtrate casing, and overall structure is simply compact, and floor space is little, it is simple to processing, popularization and application.
Preferably, the position, top of first order filtrate casing is higher than the position, top of second level filtrate casing, and the top of first order filtrate casing is enclosed, and filtrate casing top, the second level is open type；The water outlet of first order filtrate casing is flowed in the filtrate casing of the second level by two outlets, falls aeration, for Aerobic Process for Treatment.
The size of first order filtrate casing and second level filtrate casing is identical, because carry out ammonification, nitrification and denitrification reaction in first order filtrate casing and second level filtrate casing respectively simultaneously, denitrogenation dephosphorizing is not separately performed, so arrange simultaneously and be also beneficial to batch production first order filtrate casing and second level filtrate casing, simplify the process manufacturing apparatus of the present invention.
Preferably, two outlets of first-level filtering hopper body are arranged on the same At The Height in distance top, and the position, top of first order filtrate casing is higher than position, the top 15～20dm of second level filtrate casing.The water outlet being easy to first order filtrate casing is flowed in the filtrate casing of the second level by two outlets, utilizes action of gravity to fall aeration, it is not necessary to use extra man power, saves the energy.
Preferably, recycling effluent mouth is connected with backflow tank by reflux line, is sequentially provided with return valve and reflux pump on the reflux line of recycling effluent mouth side.Return valve is used for controlling sewage and whether refluxes from recycling effluent mouth, and reflux pump is for pumping into backflow sewage in backflow tank.
Preferably, the pipeline that tank is connected with backflow tank is provided with No. 1 peristaltic pump, and the pipeline that backflow tank is connected with first order filtrate casing is provided with No. 2 peristaltic pumps.No. 1 peristaltic pump for pumping in backflow tank by the sewage in tank, and No. 2 peristaltic pumps are for pumping into the sewage in backflow tank in first order filtrate casing.
One is in conjunction with A2/ O method utilizes trade waste for the method for the sewage disposal system of filtrate denitrogenation dephosphorizing, the steps include:
A, build above-described one in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing；
B, closing volume valve and emptying valve；
C, open No. 1 peristaltic pump, arrange that flow is dischargeable capacity 1/2, in tank, Nitrogen-and Phosphorus-containing sewage enters backflow tank by No. 1 peristaltic pump, first order filtrate casing is entered by No. 2 peristaltic pumps, sewage enters first order filter material layer through supporting layer and carries out anaerobic treatment, filtrate in first order filter material layer, i.e. dehydration aluminum mud, or dehydration aluminum mud and acid neutralize the mixture of residue, containing abundant ferrum and calcium in this filtrate, dehydration aluminum mud is based on ferrum oxide and aluminium oxide, under the environment of anaerobism, ferrum oxide and aluminium oxide respectively with the pollutant generation chemical reaction of the nitrogenous and phosphorus in sewage, become precipitation, remove the nitrogen in sewage and phosphorus；Analyze to water pollutant removal aspect, sewage denitrification and dephosphorization is had good effect by dehydration aluminum mud, acid neutralizes residue can reduce the concentration of dissolved organic matter in water body, nitrogen and phosphorus, both of which has bigger specific surface area, pollutant in sewage have certain absorbability, and chemical composition stablizes non-secondary pollution simultaneously.
D, constantly raising along with wastewater level, when height of water level arrives two outlets of first order filtrate casing, sewage will fall through water from two outlets and enter the filtrate casing of the second level after aeration, namely carry out Aerobic Process for Treatment；First order filtrate casing is higher than second level filtrate casing, the sewage flowed out from first order filtrate casing causes natural water to fall aeration because of the difference in height of two tanks, current are carried water distribution layer secretly and are entered second level filtrate casing, enhance Denitrification, improve the effect of denitrogenation；Fall into from outlet the process of second level filtrate casing and carried air secretly, be conducive to building the aerobic environment in the filtrate casing of the second level, and then be conducive to nitrification and denitrification effect.
E, sewage enter second level filter material layer and carry out anaerobic treatment；Filtrate in the filter material layer of the second level, namely acid neutralizes residue, or dehydration aluminum mud and acid neutralize the mixture of residue, containing abundant ferrum and calcium in this filtrate, dehydration aluminum mud is based on ferrum oxide and aluminium oxide, under the environment of anaerobism, acid neutralizes residue can reduce the concentration of dissolved organic matter in water body, nitrogen and phosphorus, ferrum oxide and aluminium oxide respectively with the pollutant generation chemical reaction of the nitrogenous and phosphorus in sewage, become precipitation, remove the nitrogen in sewage and phosphorus；Analyze to water pollutant removal aspect, sewage denitrification and dephosphorization is had good effect by dehydration aluminum mud, acid neutralizes residue can reduce the concentration of dissolved organic matter in water body, nitrogen and phosphorus, both of which has bigger specific surface area, pollutant in sewage have certain absorbability, and chemical composition stablizes non-secondary pollution simultaneously.
F, sewage flow into supporting layer from second level filter material layer, open return valve, and sewage flows through reflux pump from recycling effluent mouth and flows into backflow tank；Enter after backflow tank until backflow sewage, open emptying valve；
In G, tank, Nitrogen-and Phosphorus-containing sewage enters in backflow tank by No. 1 peristaltic pump, mix with the backflow sewage in backflow tank, enter in first order filtrate casing by No. 2 peristaltic pumps, entering first order filter material layer through supporting layer and mixed sewage is carried out anaerobic treatment, the filtrate in first order filter material layer removes the nitrogen in sewage and phosphorus further；That is, 1/2 Nitrogen-and Phosphorus-containing sewage of dischargeable capacity flows to tank through No. 1 peristaltic pump, together flows to first order filtrate casing, enter first order filter material layer through supporting layer and process after mixing with the 1/2 of dischargeable capacity backflow sewage；Owing to there being the step of backflow in this plant running process, arrange that flow of inlet water is dischargeable capacity 1/2, backflow sewage is also dischargeable capacity 1/2, so to ensure that in device, sewage total amount is less than dischargeable capacity.
H, constantly raise along with combined sewage water level, when height of water level arrives the first order two outlets of filtrate casing, repeat step D and E；Carry out Aerobic Process for Treatment and anaerobic treatment respectively, remove the Organic substance in sewage, nitrogen and phosphorus further；A sewage part after treatment flows through reflux pump from recycling effluent mouth and flows in backflow tank, and another part flows out from total outlet through emptying valve；
I, repetition step C-H, in this sewage disposal system, current are in dynamic process, and sewage is circulated process.The mode adopting backflow sewage simultaneously to intake with raw sewage, takes full advantage of the carbon source in former water, improves denitrification effect；
Single filter material wants to reach higher position reason effect and has to pass through multistep treatment, if the two can be combined as filtering media application in domestic sewage in rural areas and livestock breeding wastewater treatment technology, the processing mode of a kind of new recycling is also provided for while the reaction medium of lower price high efficiency is provided, simultaneously, in existing denitrification dephosphorization technique, utilize A2/ O method carries out sewage disposal and obtains good denitrification effect.Therefore, two kinds of filtrates are adopted and in conjunction with A2Sewage is carried out processing the Nitrogen/Phosphorus Removal that can be greatly increased sewage by/O method.Selected materials is with low cost, effect is notable, is especially suitable for domestic sewage in rural areas and livestock breeding wastewater processes, have bigger market prospect and application value.
Preferably, the Nitrogen-and Phosphorus-containing sewage hydraulic load that tank is distributed in first order filtrate casing ranges for 0.4～1.0m3·m-2·d-1。
Preferably, the number of times of circulation is that the pollution level according to raw sewage determines, the COD in raw sewage, in 200～300mg/L, circulates 1～3 time；COD, within the scope of 300～500mg/L, circulates 2～4 times；COD, within the scope of 500～1000mg/L, circulates 3～6 times.So it is disposed to Organic substance, nitrogen and the phosphorus of fully removing in sewage.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, have the advantages that
(1) in the present invention, filtrate is that acid neutralizes residue and dehydration aluminum mud, first order filter material layer is that acid neutralizes residue or the two mixing, described second level filter material layer is dehydration aluminum mud or the two mixing, in tank, Nitrogen-and Phosphorus-containing sewage enters first order filtrate casing from water inlet after being mixed with backflow sewage by peristaltic pump, the specific current method of operation is coordinated to flow through second level filtrate casing, the ability of its denitrogenation dephosphorizing can be given full play to, the removal effect of nitrogen and two kinds of nutrient substance of phosphorus in sewage is made to be promoted further, overall synthetic operation can reach to run, much larger than single filter material, the technique effect brought；
(2) containing abundant ferrum and calcium in the filtrate of the present invention, under the environment of anaerobism, ferrum oxide and aluminium oxide respectively with the pollutant generation chemical reaction of the nitrogenous and phosphorus in sewage, become precipitation, nitrogen in removal sewage and phosphorus；Analyze to water pollutant removal aspect, sewage denitrification and dephosphorization is had good effect by dehydration aluminum mud, acid neutralizes residue can reduce the concentration of dissolved organic matter in water body, nitrogen and phosphorus, both of which has bigger specific surface area, pollutant in sewage have certain absorbability, and chemical composition stablizes non-secondary pollution simultaneously；
(3) filtering device of the present invention includes first order filtrate casing and second level filtrate casing, first order filtrate casing is higher than second level filtrate casing, the sewage flowed out from first order filtrate casing causes natural water to fall aeration because of the difference in height of two tanks, current are carried water distribution layer secretly and are entered second level filtrate casing, enhance Denitrification, improve the effect of denitrogenation；
(4) two outlets of the first order filtrate casing of the present invention are arranged on the distance same At The Height of top 1dm, the position, top of first order filtrate casing is higher than position, the top 15～20dm of second level filtrate casing, the water outlet being easy to first order filtrate casing flows in the filtrate casing of the second level by two outlets, action of gravity is utilized to fall aeration, extra man power need not be used, save the energy；
(5) sewage that the present invention is refluxed by second level filtrate casing together enters in the process of first order filtrate casing after mixing with raw sewage, adopt the mode that backflow sewage is intake simultaneously with raw sewage, augmenting response contact area also can make full use of the carbon source in former water, improves denitrification effect；
(6) single filter material wants to reach higher position reason effect and has to pass through multistep treatment, the two is combined as filtering media application in domestic sewage in rural areas and livestock breeding wastewater treatment technology, the processing mode of a kind of new recycling is also provided for while the reaction medium of lower price high efficiency is provided, meanwhile, A is utilized2/ O method carries out sewage disposal and obtains good denitrification effect；Therefore, two kinds of filtrates are adopted and in conjunction with A2Sewage is carried out processing the Nitrogen/Phosphorus Removal that can be greatly increased sewage by/O method.Selected materials is with low cost, effect is notable, is especially suitable for domestic sewage in rural areas and livestock breeding wastewater processes, have bigger market prospect and application value；
(7) supporting layer of the present invention is made up of gravel and cobblestone, is used for carrying first order filter material layer and second level filter material layer, builds the environment of anaerobic treatment；First order filtrate casing is similar with second level filtrate casing, and overall structure is simply compact, and floor space is little, it is simple to processing, popularization and application；
(8) first order filtrate casing of the present invention and the size of second level filtrate casing are identical, because carry out ammonification, nitrification and denitrification reaction in first order filtrate casing and second level filtrate casing respectively simultaneously, denitrogenation dephosphorizing is not separately performed, so arrange simultaneously and be also beneficial to batch production first order filtrate casing and second level filtrate casing, simplify the process manufacturing apparatus of the present invention, it is simple to processing.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is first order filtrate casing schematic diagram；
Fig. 3 is second level filtrate casing schematic diagram.
In figure: 1, tank；2, No. 1 peristaltic pump；3, backflow tank；4, No. 2 peristaltic pumps；5, first order filtrate casing；6, second level filtrate casing；7, first order filter material layer；8, second level filter material layer；9, supporting layer；10, water inlet；11, outlet；12, recycling effluent mouth；13, total outlet；14, return valve；15, emptying valve；16, reflux pump；17, reflux line.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be further described.
Embodiment 1
In conjunction with Fig. 1-3, one utilizes trade waste and A2/ O method is in conjunction with the sewage disposal system of denitrogenation dephosphorizing, including tank 1, multistage filtering device and reflux；Multistage filtering device includes first order filtrate casing 5 and second level filtrate casing 6；
First order filtrate casing 5 is followed successively by from bottom to top: supporting layer 9, first order filter material layer 7 and water distribution layer, and the filtrate of first order filter material layer 7 is the mixing that acid neutralizes residue or acid neutralization residue and both dehydration aluminum mud；Water inlet 10 is arranged on the left bottom of first order filtrate casing 5, and two outlets 11 are arranged on the same At The Height in right flank top of first order filtrate casing 5, and outlet 11 is for by the sewage discharge in first order filtrate casing 5 to second level filtrate casing 6.Supporting layer 9 is made up of gravel and cobblestone, is used for carrying first order filter material layer 7, builds the environment of anaerobic treatment；First order filtrate casing 5 overall structure is simply compact, and floor space is little, it is simple to processing, popularization and application.
The water outlet of first order filtrate casing 5 flows in second level filtrate casing 6, and the bottom of second level filtrate casing 6 is provided with two outlets, and one of them is connected with backflow tank 3.
Second level filtrate casing 6 is followed successively by from bottom to top: supporting layer 9, second level filter material layer 8 and water distribution layer, and the filtrate of second level filter material layer 8 is the mixing that dehydration aluminum mud or acid neutralize residue and both dehydration aluminum mud；Recycling effluent mouth 12 and total outlet 3 it is respectively equipped with bottom second level filtrate casing 6, recycling effluent mouth 12 is to be for further processing by sewage backflow after treatment, removing the Organic substance in sewage, nitrogen and phosphorus further, total outlet 3 is for the sewage after emission treatment；The pipeline being connected with total outlet 3 is provided with emptying valve 15, and emptying valve 15 is used for controlling sewage and whether flows out from total outlet 3.Supporting layer 9 is made up of gravel and cobblestone, is used for carrying first order filter material layer 7, builds the environment of anaerobic treatment；Second level filtrate casing 6 is similar with first order filtrate casing 5, and overall structure is simply compact, and floor space is little, it is simple to processing, popularization and application.
The position, top of first order filtrate casing 5 is higher than the position, top of second level filtrate casing 6, and the top of first order filtrate casing 5 is enclosed, and filtrate casing 6 top, the second level is open type；The water outlet of first order filtrate casing 5 is flowed in second level filtrate casing 6 by two outlets 11, falls aeration, for Aerobic Process for Treatment.
Reflux includes backflow tank 3 and reflux line 17, and recycling effluent mouth 12 is connected with backflow tank 3 by reflux line 17, is sequentially provided with return valve 14 and reflux pump 16 on the reflux line 17 of recycling effluent mouth 12 side.Return valve 14 is used for controlling sewage and whether refluxes from recycling effluent mouth 12, and reflux pump 16 is for pumping into backflow sewage in backflow tank 3.
Tank 1, backflow tank 3, first order filtrate casing 5 are sequentially connected with, and the pipeline that tank 1 is connected with backflow tank 3 is provided with No. 1 peristaltic pump 2, and the pipeline that backflow tank 3 is connected with first order filtrate casing 5 is provided with No. 2 peristaltic pumps 4.No. 1 peristaltic pump 2 for pumping in backflow tank 3 by the sewage in tank 1, and No. 2 peristaltic pumps 4 are for pumping into the sewage in backflow tank 3 in first order filtrate casing 5.
One is in conjunction with A2/ O method utilizes trade waste for the method for the sewage disposal system of filtrate denitrogenation dephosphorizing, the steps include:
A, build and above-described a kind of utilize trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing in conjunction with A2/O method；
B, closing volume valve 14 and emptying valve 15；
C, tank 1 are distributed into the Nitrogen-and Phosphorus-containing sewage hydraulic load of first order filtrate casing 5 and range for 0.4～1.0m3·m-2·d-1, open No. 1 peristaltic pump 2, arrange that flow is dischargeable capacity 1/2, in tank 1, Nitrogen-and Phosphorus-containing sewage enters backflow tank 3 by No. 1 peristaltic pump 2, first order filtrate casing 5 is entered by No. 2 peristaltic pumps 4, sewage enters first order filter material layer 7 through supporting layer 9 and carries out anaerobic treatment, filtrate in first order filter material layer 7, i.e. dehydration aluminum mud, or dehydration aluminum mud and acid neutralize the mixture of residue, containing abundant ferrum and calcium in this filtrate, dehydration aluminum mud is based on ferrum oxide and aluminium oxide, under the environment of anaerobism, ferrum oxide and aluminium oxide respectively with the pollutant generation chemical reaction of the nitrogenous and phosphorus in sewage, become precipitation, remove the nitrogen in sewage and phosphorus；Analyze to water pollutant removal aspect, sewage denitrification and dephosphorization is had good effect by dehydration aluminum mud, acid neutralizes residue can reduce the concentration of dissolved organic matter in water body, nitrogen and phosphorus, both of which has bigger specific surface area, pollutant in sewage have certain absorbability, and chemical composition stablizes non-secondary pollution simultaneously.
D, constantly raising along with wastewater level, when height of water level arrives two outlets 11 of first order filtrate casing 5, sewage will fall through water from two outlets 11 and enter second level filtrate casing 6 after aeration, namely carry out Aerobic Process for Treatment；First order filtrate casing 5 is higher than second level filtrate casing 6, the sewage flowed out from first order filtrate casing 5 causes natural water to fall aeration because of the difference in height of two tanks, current are carried water distribution layer secretly and are entered second level filtrate casing 6, enhance Denitrification, improve the effect of denitrogenation；
E, sewage enter second level filter material layer 8 and carry out anaerobic treatment；Filtrate in second level filter material layer 8, namely acid neutralizes residue, or dehydration aluminum mud and acid neutralize the mixture of residue, containing abundant ferrum and calcium in this filtrate, dehydration aluminum mud is based on ferrum oxide and aluminium oxide, under the environment of anaerobism, acid neutralizes residue can reduce the concentration of dissolved organic matter in water body, nitrogen and phosphorus, ferrum oxide and aluminium oxide respectively with the pollutant generation chemical reaction of the nitrogenous and phosphorus in sewage, become precipitation, remove the nitrogen in sewage and phosphorus；Analyze to water pollutant removal aspect, sewage denitrification and dephosphorization is had good effect by dehydration aluminum mud, acid neutralizes residue can reduce the concentration of dissolved organic matter in water body, nitrogen and phosphorus, both of which has bigger specific surface area, pollutant in sewage have certain absorbability, and chemical composition stablizes non-secondary pollution simultaneously.
F, sewage flow into supporting layer 9 from second level filter material layer 8, open return valve 14, and sewage flows through reflux pump 16 from recycling effluent mouth 12 and flows into backflow tank 3；Enter after backflow tank 3 until backflow sewage, open emptying valve 15；
In G, tank 1, Nitrogen-and Phosphorus-containing sewage enters in backflow tank 3 by No. 1 peristaltic pump 2, mix with the backflow sewage in backflow tank 3, enter in first order filtrate casing 5 by No. 2 peristaltic pumps 4, entering first order filter material layer 7 through supporting layer 9 and mixed sewage is carried out anaerobic treatment, the filtrate in first order filter material layer 7 removes the nitrogen in sewage and phosphorus further；That is, 1/2 Nitrogen-and Phosphorus-containing sewage of dischargeable capacity flows to tank 3 through No. 1 peristaltic pump 2, together flows to first order filtrate casing 5, enter first order filter material layer 7 through supporting layer 9 and process after mixing with the 1/2 of dischargeable capacity backflow sewage；
H, constantly raise along with combined sewage water level, when height of water level arrives the first order 5 two outlets 11 of filtrate casing, repeat step D and E；Carry out Aerobic Process for Treatment and anaerobic treatment respectively, remove the Organic substance in sewage, nitrogen and phosphorus further；A sewage part after treatment flows through reflux pump 16 from recycling effluent mouth 12 and flows in backflow tank 3, and another part flows out from total outlet 13 through emptying valve 15；
I, repetition step C-H, in this sewage disposal system, current are in dynamic process, and sewage is circulated process.The mode adopting backflow sewage simultaneously to intake with raw sewage, takes full advantage of the carbon source in former water, improves denitrification effect；COD in raw sewage (sewage in tank 1), in 200～300mg/L, circulates 1～3 time；COD, within the scope of 300～500mg/L, circulates 2～4 times；COD, within the scope of 500～1000mg/L, circulates 3～6 times.So it is disposed to Organic substance, nitrogen and the phosphorus of fully removing in sewage.
The removal efficiency of nitrogen and phosphorus Contrast on effect data of table 1 single filter material and combination filtrate
| Test index | SS(mg/L) | COD(mg/L) | NH3-N(mg/L) | TN(mg/L) | TP(mg/L) |
| Single filter material | 56～65 | 58～62 | 49～59 | 45～56 | 49～58 |
| Combination filtrate | 95～98 | 95～98 | 94～98 | 90～95 | 98～99 |
Such as table 1, it is single filter material and the removal efficiency of nitrogen and phosphorus Contrast on effect data of combination filtrate；Single filter material wants to reach higher position reason effect and has to pass through multistep treatment, the two is combined as filtering media application in domestic sewage in rural areas and livestock breeding wastewater treatment technology, the processing mode of a kind of new recycling is also provided for while the reaction medium of lower price high efficiency is provided, meanwhile, A is utilized2/ O method carries out sewage disposal and obtains good denitrification effect；Therefore, two kinds of filtrates are adopted and in conjunction with A2Sewage is carried out processing the Nitrogen/Phosphorus Removal that can be greatly increased sewage by/O method, and selected materials is with low cost, effect is notable, is especially suitable for domestic sewage in rural areas and livestock breeding wastewater processes, have bigger market prospect and application value.
Embodiment 2
The present embodiment is with embodiment 1, and wherein, two outlets 11 of first order filtrate casing 5 are arranged on the distance same At The Height of top 1dm, and the position, top of first order filtrate casing 5 is higher than position, the top 15～20dm of second level filtrate casing 6.The water outlet being easy to first order filtrate casing 5 is flowed in second level filtrate casing 6 by two outlets 11, utilizes action of gravity to fall aeration, it is not necessary to use extra man power, saves the energy.
Embodiment 3: certain domestic sewage in rural areas is processed
Certain domestic sewage in rural areas is processed, it is proposed to a kind of utilize trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing in conjunction with A2/O method, in conjunction with Fig. 1, with embodiment 1,
Acid neutralizes the garbage that residue is converted in rutile process selected from ilmenite to produce, and dehydration aluminum mud purifies residue side-product produced by tap water selected from the flocculant such as aluminium salt；Nitrogen-and Phosphorus-containing sewage flows through first order filtrate case successively with backflow sewage, 5 with second level filtrate casing 6, and owing to difference in height causes natural water to fall aeration when being entered second level filtrate casing 6 by first order filtrate casing 5, enhance denitrification effect.The synthetic operation of twice filtrate entirety can reach to run, much larger than single filter material, the technique effect brought；Meanwhile, twice filtrate has good phosphor-removing effect, and the phosphorus in sewage is had higher clearance by synthetic operation；And filtrate itself has bigger surface area, it is possible to the nitrogen in sewage and phosphorus are adsorbed.The sewage simultaneously refluxed by second level filtrate casing 6 together enters in the process of first order filtrate casing 5 after mixing with raw sewage, adopt the mode that backflow sewage is intake simultaneously with raw sewage, make use of the carbon source in raw sewage fully, greatly add Denitrification effect.
The side of tank 1 is connected with tank 3 by pipeline near bottom position, and this pipeline is provided with No. 1 peristaltic pump 2, the bottom of tank 1 is higher than the top of first order filtrate casing 5, to be inverted with backflow sewage and flow to first order filtrate casing 5, common entrance first order filter material layer 7, augmenting response contact area also can make full use of into the carbon source in water, strengthens its denitrifying capacity.
Wherein, tank 1 radius 1.5m, high 1.2m, effective depth 1m, makes by PVC material；Tank 3 is identical with tank 1；First order filtrate casing 5 overall length 0.5m, wide 0.5m, total height 1m, supporting layer 9 is highly 20cm in first order filtrate casing 5 from top to bottom: first order filter material layer 7 is highly 70cm；In second level filtrate casing 6 from top to bottom: second level filtrate 8 is highly 70cm, supporting layer 9 is highly 20cm, the bottom of tank 1 is higher than first order filtering device 5 top 0.5m, and the position, top of first order filtrate casing 5 is higher than position, the top 15dm of second level filtrate casing 6.
The Nitrogen-and Phosphorus-containing sewage hydraulic load that tank 1 is distributed in first order filtrate casing 5 ranges for 0.4m3·m-2·d-1, in this enforcement, the method step of operation of sewage disposal system is with embodiment 1, and the COD in raw sewage is in 200mg/L, circulates 1 time.
This system is run 3 months continuously, every 7 days, effluent quality is monitored, and after rural domestic sewage treatment, in water outlet, total nitrogen and total phosphorus all have higher removal effect, and other water quality index also maintain higher clearance, as shown in table 1.
The water inlet of certain domestic sewage in rural areas and effluent quality test index situation in table 2 embodiment 3
| Test index | SS(mg/L) | COD(mg/L) | NH3-N(mg/L) | TN(mg/L) | TP(mg/L) |
| Tank 1 is intake | 150～260 | 450～520 | 39.2～59.8 | 68.1～90.9 | 9.5～14.5 |
| Total water outlet | 5.2～9.6 | 31.7～45.2 | 2.7～4.3 | 7.2～11.6 | 0.4～0.6 |
| Clearance (%) | 97～99 | 95～98 | 94～98 | 90～95 | 98～99 |
Embodiment 4: certain animal farm wastewater is processed
Certain animal farm wastewater is processed, it is proposed to a kind of utilize trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing in conjunction with A2/O method, in conjunction with Fig. 1, tank 1 and 3 radius 2m, total height 2m, effective depth 1.8m, brick mix structure；Filtrate casing 5 and 6 overall length 1m, wide 0.5m, total height 1m, it is 1.0m that tank 1 includes nitrogen-phosphorus wastewater hydraulic load3·m-2·d-1.The bottom of tank 1 is higher than the top 1m of first order filtrate casing 5.The position, top of first order filtrate casing 5 is higher than position, the top 20dm of second level filtrate casing 6；COD in raw sewage is in 300mg/L, circulates 3 times, and other parts are with embodiment 1.
This system is run 2 months continuously, every 7 days, effluent quality is monitored, and result of study shows, total nitrogen and total phosphorus in animal farm wastewater all have higher removal effect, as shown in table 2.
The water inlet of certain animal farm wastewater and effluent quality test index situation in table 3 embodiment 4
Embodiment 5: to certain rural area 1 sanitary sewage disposal
To certain rural area 1 sanitary sewage disposal, it is proposed to a kind of utilize trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing in conjunction with A2/O method, in conjunction with Fig. 1, tank 1 and 3 radius 2m, total height 2m, effective depth 1.8m, brick mix structure；Filtrate casing 5 and 6 overall length 1m, wide 0.5m, total height 1m, it is 0.8m that tank 1 includes nitrogen-phosphorus wastewater hydraulic load3·m-2·d-1.The bottom of tank 1 is higher than the top 1m of first order filtrate casing 5.The position, top of first order filtrate casing 5 is higher than position, the top 18dm of second level filtrate casing 6；COD in raw sewage is in 250mg/L, circulates 2 times, and other parts are with embodiment 1.
This system is run 2 months continuously, every 7 days, effluent quality is monitored, and result of study shows, total nitrogen and total phosphorus in animal farm wastewater all have higher removal effect, as shown in table 4.
The water inlet of certain animal farm wastewater and effluent quality test index situation in table 4 embodiment 5
Embodiment 6
The sewage disposal system in certain chicken farm, adopts the system described in embodiment 1, and wherein, the COD in raw sewage, within the scope of 300mg/L, circulates 2 times, and remainder is with embodiment 1.
Embodiment 7
The sewage disposal system of certain duckery, adopts the system described in embodiment 1, and wherein, the COD in raw sewage, within the scope of 500mg/L, circulates 4 times, and remainder is with embodiment 1.
Embodiment 8
The sewage disposal system of certain foster goose field, adopts the system described in embodiment 1, and wherein, the COD in raw sewage, within the scope of 400mg/L, circulates 3 times, and remainder is with embodiment 1.
Embodiment 9
The sewage disposal system in certain chicken farm, adopts the system described in embodiment 1, and wherein, the COD in raw sewage, within the scope of 500mg/L, circulates 3 times, and remainder is with embodiment 1.
Embodiment 10
The sewage disposal system in certain chicken farm, adopts the system described in embodiment 1, and wherein, the COD in raw sewage, within the scope of 1000mg/L, circulates 6 times, and remainder is with embodiment 1.
Embodiment 11
The sewage disposal system in certain chicken farm, adopts the system described in embodiment 1, and wherein, the COD in raw sewage, within the scope of 800mg/L, circulates 5 times, and remainder is with embodiment 1.
Claims (7)
1. one kind in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, including tank (1) and multistage filtering device, it is characterised in that also include reflux；Multistage filtering device includes first order filtrate casing (5) and second level filtrate casing (6), reflux includes backflow tank (3) and reflux line (17), tank (1), backflow tank (3), first order filtrate casing (5) are sequentially connected with, the water outlet of first order filtrate casing (5) flows in second level filtrate casing (6), the bottom of second level filtrate casing (6) is provided with two outlets, and one of them is connected with backflow tank (3).
2. one according to claim 1 is in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, it is characterized in that, first order filtrate casing (5) is followed successively by from bottom to top: supporting layer (9), first order filter material layer (7) and water distribution layer, and the filtrate of first order filter material layer (7) is the mixing that acid neutralizes residue or acid neutralization residue and both dehydration aluminum mud；Water inlet (10) is arranged on the left bottom of first order filtrate casing (5), and two outlets (11) are arranged on the same At The Height in right flank top of first order filtrate casing (5).
3. one according to claim 1 is in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, it is characterized in that, second level filtrate casing (6) is followed successively by from bottom to top: supporting layer (9), second level filter material layer (8) and water distribution layer, and the filtrate of second level filter material layer (8) is the mixing that dehydration aluminum mud or acid neutralize residue and both dehydration aluminum mud；Bottom, second level filtrate casing (6) is respectively equipped with recycling effluent mouth (12) and total outlet (13)；The pipeline being connected with total outlet (13) is provided with emptying valve (15).
4. the one according to claim 1-3 any one is in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, it is characterized in that, the position, top of first order filtrate casing (5) is higher than the position, top of second level filtrate casing (6), and the top of first order filtrate casing (5) is enclosed, filtrate casing (6) top, the second level is open type.
5. one according to claim 1 is in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, it is characterized in that, two outlets (11) of first-level filtering hopper body (5) are arranged on the same At The Height in distance top, and the position, top of first order filtrate casing (5) is higher than position, the top 15～20dm of second level filtrate casing (6).
6. one according to claim 3 is in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, it is characterized in that, recycling effluent mouth (12) is connected with backflow tank (3) by reflux line (17), is sequentially provided with return valve (14) and reflux pump (16) on the reflux line (17) of recycling effluent mouth (12) side.
7. one according to claim 3 is in conjunction with A2/ O method utilizes trade waste for the sewage disposal system of filtrate denitrogenation dephosphorizing, it is characterized in that, the pipeline that tank (1) is connected with backflow tank (3) is provided with No. 1 peristaltic pump (2), and the pipeline that backflow tank (3) is connected with first order filtrate casing (5) is provided with No. 2 peristaltic pumps (4).
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| CN105731643B (en) * | 2016-03-03 | 2019-05-17 | 环境保护部南京环境科学研究所 | A kind of combination A2/ O method is the sewage disposal system and method for filtrate denitrogenation dephosphorizing using trade waste |
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| CN105731643B (en) * | 2016-03-03 | 2019-05-17 | 环境保护部南京环境科学研究所 | A kind of combination A2/ O method is the sewage disposal system and method for filtrate denitrogenation dephosphorizing using trade waste |
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