CN103848538B - A kind of reactor and method thereof strengthening ammonia nitrogen in filter tank removal tap water - Google Patents

A kind of reactor and method thereof strengthening ammonia nitrogen in filter tank removal tap water Download PDF

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CN103848538B
CN103848538B CN201210518477.XA CN201210518477A CN103848538B CN 103848538 B CN103848538 B CN 103848538B CN 201210518477 A CN201210518477 A CN 201210518477A CN 103848538 B CN103848538 B CN 103848538B
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water
original
sand filter
reactor
biologic packing
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CN103848538A (en
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刘锐平
刘峰
刘会娟
柏耀辉
曲久辉
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Research Center for Eco Environmental Sciences of CAS
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Research Center for Eco Environmental Sciences of CAS
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Abstract

The present invention relates to reactor and method thereof that ammonia nitrogen in tap water is removed in strengthening filter tank.Reactor of the present invention is when the original inhalant region of sand filter, water distributing area, supporting layer, exhalant region are not all changed; Set up biological nitration zone of action and aerating system that biologic packing material is installed; The biological nitration zone of action set up and the original filtrating area of sand filter to be in same reactor and to form reaction zone, biological nitration zone of action is positioned at the top of the original filtrating area of sand filter, is provided with the aeration head be connected with the air compressor of aerating system by airline in the below of biologic packing material.The present invention utilizes the strengthening nitrification of the epontic microbial film of biologic packing material to remove ammonia nitrogen in water and partial organic substances, and provides the oxygen needed for biology by aeration; Suspension particulate matter, microbial film etc. in water retain by filtration procedure, guarantee biological safety, prevent secondary pollution.The present invention can be used for the purifying treatment etc. of the tap water comprised by ammonia and nitrogen pollution water source.

Description

A kind of reactor and method thereof strengthening ammonia nitrogen in filter tank removal tap water
Technical field
The invention belongs to drink water purifying field, particularly a kind of reactor strengthening ammonia nitrogen in filter tank removal tap water based on sand filter, and utilize this reactor to carry out removing the method for ammonia nitrogen in tap water.
Background technology
Along with Chinese society rapid economic development, pollutant discharge amount increases year by year, and water environment pollution problem highlights.Samll cities and towns of China mainly with the surface water such as medium or smallsized river, Hu Ku as drinking water source, arbitrarily to discharge by cities and towns trade effluent, domestic sewage in rural areas, domestic refuse, livestock and poultry cultivation refuse and agriculture chemical pollution of area source etc. affects, there is persistence or seasonal ammonia nitrogen excessive problem in various degree more in town and country potable water source district, and have the gesture of aggravation, serious threat masses drinking water safety and life and health, ensure that drinking water safety has become China's Social Events to be solved.The up-to-date drinking water standard of country (GB5749-2006) enforced in 2012, and therefore, how guaranteeing in output water that ammonia nitrogen is up to standard is many water factories problems faced.
But the conventional treatment process of drink water purifying, namely coagulation, precipitation, filtration and sterilization process, almost do not have removal ability to ammonia nitrogen.Ammonia nitrogen in water outlet consumes chlorhexidine-containing disinfectant on the one hand, considerably increases chlorine demand, makes water produce stink, and adds disinfection byproduct (DBP) growing amount and cause prominent property, once mineralized nitrogen is cultured water, to the toxic effect of human body; On the other hand, because ammonia nitrogen can cause the amount reproduction of autotrophic bacteria in pipe network, water quality deterioration and piping corrosion will be caused.
The method of ammonia nitrogen is applied in tap water except generally speaking still can be divided into Physical, physico-chemical processes and biological treatment three major types.Wherein, biological treatment is exactly utilize the metabolism of microorganism and nitration denitrification effect ammonium oxidation in water is become nitrite or nitrate and removes, it is high that biological oxidation process removes ammonia efficiency, and multiple pollutant can be removed simultaneously, cost is low, being welcome widely, is also the development trend except ammonia nitrogen in Water purification.Biological filter is set up on common process basis, utilizes microorganism nitrification to strengthen ammonia nitrogen removal, but biological filter head loss is comparatively large, floor space is comparatively large, is difficult to realize in fish drugs; Biological Pretreatment can effectively remove ammonia nitrogen in water, but need set up pre-treatment structures in conventional treatment process front end, adds floor space, increases disposable investment, is unfavorable for applying; The drinking water advanced treatment technique of ozone and active carbon, ozone/biological activated carbon can solve the pollution problem such as organism, ammonia nitrogen preferably, but investment is all higher with running cost, and many water factories are difficult to bear.
For the ammonia nitrogen problem existed in tap water and practical application angle, the present invention considers directly to transform on the common process basis of water factory's drink water purifying, at conventional sand filter overhung biologic packing material, to promote biological apposition growth, form stable microbial film, by the nitration denitrification effect of biology by ammonia nitrogen removal in water, also effectively can remove Organic substance in water simultaneously.
Summary of the invention
An object of the present invention is on the common process basis of drink water purifying, through simple to after scrap build, thus provide a kind of and strengthens the reactor that ammonia nitrogen in tap water is effectively removed in filter tank.
Two of object of the present invention is based on microbiological deterioration, the strengthening filter tank of object one is utilized effectively to remove the reactor of ammonia nitrogen in tap water, a kind of thus provide performance efficiency, economically feasible, running maintenance simple, and the method for ammonia nitrogen in removal tap water easy to implement in engineered.
Know-why of the present invention is based on the sand filter of purifying drinking water, is used for the biologic packing material of bio-film colonization, and forms biological nitration zone of action thus, arrange aerating system in the below of biological nitration zone of action in the overhung of sand filter.Utilize the ammonia nitrogen in the strengthening nitrification removal water of the epontic microbial film of biologic packing material, and remove part small organic molecule; Aerating system provides the sufficient dissolved oxygen needed for biology in water with biological nitration zone of action; By sand filtration effect, suspended particulate, microbial film etc. are retained, guarantee microbial safety, avoid secondary pollution.In removal tap water of the present invention, the reactor of ammonia nitrogen can be used for the purifying treatment of the tap water by ammonia and nitrogen pollution water source, also can be applicable to the removal of ammonia nitrogen in municipal effluent and reuse water.
To achieve these goals, the reactor of ammonia nitrogen in tap water is removed in strengthening filter tank of the present invention is when the original inhalant region of sand filter, water distributing area, supporting layer, exhalant region are not all changed; Set up biological nitration zone of action and aerating system; Back-purge system can keep the original back-purge system of sand filter motionless, also the back flushing rising pipe in back-purge system can be arranged in sand filter above filter material layer hang the slightly biased lower place, centre of biologic packing material; The filter material layer of sand filter can adopt the original filler of sand filter, and also replaceable is other filtrate; When changing filtrate, filtrate can be selected from one or more in quartz sand, hard coal, granulated active carbon.
The reactor that ammonia nitrogen in tap water is removed in strengthening filter tank of the present invention comprises the original inhalant region of sand filter, the original water distributing area of sand filter, the original filtrating area of sand filter, the original supporting layer of sand filter, the original exhalant region of sand filter, and back-purge system, the biological nitration zone of action set up and the aerating system set up.
One comprise the original inhalant region of sand filter, the original water distributing area of sand filter, the original filtrating area of sand filter, the original supporting layer of sand filter, the original exhalant region of sand filter container form described in reactor, sand filter original inhalant region place on top of the container of the reactor described in forming is provided with the water inlet pipe having multiple hole; The top being positioned at the described container on described water inlet pipe top is provided with perforation support or perforation plate.
The described biological nitration zone of action set up is positioned at the top of the original filtrating area of sand filter, and in the below of the original inhalant region of described sand filter, be made up of the biologic packing material for bio-film colonization, the aeration head be connected with the air compressor 7 of the described aerating system set up by airline is installed in the below of described biologic packing material.
One end of described biologic packing material is suspended on described perforation support or perforation plate, and the other end is fixed on the fixed support that arranges below described biologic packing material.
Described perforation support or perforation plate are mounted on the bearing as transmission mechanism, the direction turning 90 degrees and become and be parallel to sand filter upwards can be turned in the direction of biologic packing material by the direction perpendicular to sand filter thus, the direction of biologic packing material can be turned over by the direction being parallel to sand filter the direction turning 90 degrees and become perpendicular to sand filter downwards equally.
The described aerating system set up is made up of aeration head, air compressor, gas meter, butterfly valve and magnetic valve.
Described aeration head is positioned at the below of described biologic packing material, described aeration head is connected with described air compressor by airline, and on this airline, described gas meter is installed, and airline between described aeration head and described gas meter is provided with described butterfly valve, the airline between described gas meter and described air compressor is provided with the magnetic valve for controlling described in aeration mode and aeration time.
The original filtrating area of described sand filter is positioned at below described biological nitration zone of action, comprises original filter material layer and original supporting layer, and described filter material layer can adopt the original filler of sand filter, and also replaceable is other filtrate; When changing filtrate, filtrate can be selected from one or more in quartz sand, hard coal, granulated active carbon.
The original water distributing area of described sand filter is still arranged on the below of the described filter cap below the original supporting layer of described sand filter; The bottom of the original water distributing area of described sand filter is provided with wash water valve, the bottom dirt of water distributing area or emptying used when reactor is stopped using need discharged.
Described back-purge system comprises backwashing pump, back flushing rising pipe and back flushing water inlet pipe.
The wall of container at the slightly biased lower place, centre of the biologic packing material described in loading in described biological nitration zone of action is provided with outlet pipeline; Or the exhalant region place above the water inlet pipe of the original inhalant region of described sand filter is provided with the outlet pipeline communicated with overflow weir; Described outlet pipeline is provided with ball valve, the outlet pipeline before described ball valve is provided with threeway, this threeway is connected with the back flushing rising pipe of described back-purge system, and back flushing rising pipe is provided with ball valve; Described back flushing water inlet pipe is positioned at the bottom of the original water distributing area of described sand filter.
Described biologic packing material can be selected from one or more in the elastic solid filler of the combined stuffing of the soft cellulose filler of the fine synthetic fibre material of hydroformylation, half soft cellulose filler of the fine synthetic fibre material of hydroformylation, the semi soft packing of polypropylene material, the semi soft packing of polyethylene material, the soft cellulose filler of the fine synthetic fibre material of hydroformylation and half soft cellulose filler of the fine synthetic fibre material of hydroformylation, the combined stuffing of activated carbon fiber material, the elastic solid filler of polyolefine material, polymeric amide material.
Described biologic packing material is different with model according to the kind of selected biologic packing material, the suspension different amts of biologic packing material, and the unit length of biologic packing material is 25 ~ 44m/m 3.
The method utilizing the reactor of ammonia nitrogen in above-mentioned removal tap water to carry out removing ammonia nitrogen in tap water of the present invention: to stream water intake mode under employing, the water inlet pipe having multiple hole that first pending water arranged by the inhalant region place on reactor top enters the inhalant region of reactor, via water inlet pipe to all directions water distribution uniformity, form water distribution area, then water inlet is through hanging the biological nitration zone of action set up of biologic packing material, mineralized nitrogen in water can be become nitrite by the nitrite bacteria that biologic packing material grows and nitrobacteria under aerobic conditions, nitrate, the nitrite generated can continue to change into nitrate, denitrifying bacterium in the denitrifying bacterium under anaerobic biologic packing material grown or the original filtrating area of sand filter can utilize nitrate to carry out denitrification, nitrate transformation is become nitrogen, thus is thoroughly removed by the ammonia nitrogen in water, meanwhile, the heterotrophic bacterium that biologic packing material grows under aerobic conditions can consume the organism in water, thus can remove the organism of part in water, in the operational process removing ammonia nitrogen in water, the aerating system in described reactor continuously or off and on to aeration in water, for the microbial growth comprising nitrite bacteria, nitrobacteria and heterotrophic bacterium etc. provides enough dissolved oxygens, water enters the original filtrating area of sand filter behind biological nitration zone of action, respectively through filter material layer, supporting layer, also a small amount of microorganism is had further by ammonium oxidation in filter material layer, simultaneously can suspension particulate matter and the microbial film that comes off in trap water by filteration, ensure biological safety, the water finally after process is discharged by water shoot after water distribution is carried out in the original water distributing area of sand filter.In described removal tap water ammonia nitrogen reactor for treatment after, water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
Remove on the Process ba-sis of ammonia nitrogen in water in original routine, proper extension water inlet is through hanging the hydraulic detention time (preferably the hydraulic detention time of intaking through the biological nitration zone of action set up hanging biologic packing material is 0.5 ~ 2 hour) of the biological nitration zone of action set up of biologic packing material, to ensure that in water, the material such as ammonia nitrogen fully contacts with microorganisms such as the nitrite bacteria that biologic packing material grows, nitrobacteria and heterotrophic bacteriums, plays biological action better.
The reactor of ammonia nitrogen in tap water is removed after operation one-period (being generally 12 ~ 72 hours) in strengthening filter tank of the present invention, need to carry out back flushing, before back flushing, first the direction of described biologic packing material is upwards turned over by the described bearing as transmission mechanism the direction turning 90 degrees and become and be parallel to sand filter by the direction perpendicular to sand filter, sand filter enters the normal back flushing stage; After sand filter back flushing completes, by the described bearing as transmission mechanism, described biologic packing material is turned over by the direction being parallel to sand filter the direction turning 90 degrees and become perpendicular to sand filter downwards, post-reactor recover enter normal operating phase.
Back flushing of the present invention has two kinds of modes, a kind of mode utilizes the original back-purge system of sand filter (that is: the exhalant region place above the water inlet pipe of the original inhalant region of described sand filter is provided with the outlet pipeline communicated with overflow weir), back flushing rising pipe is arranged on above water distribution area, communicates with overflow weir (as shown in Figure 1); Another kind of set-up mode is simply transformed by original for sand filter back-purge system, back flushing rising pipe is located at load biologic packing material slightly biased lower place, centre wall of container on (as shown in Figure 2), namely when back flushing, backwashing water can be discharged by back flushing rising pipe thus, back flushing rising pipe position is low, is beneficial to spoil disposal.
Aerating system in described reactor continuously or off and on to aeration in water, when taking continuous aeration, aeration rate is 0.4 ~ 10m 3/ h; When taking intermittent aeration, aeration rate is 0.4 ~ 10m 3/ h, aeration gap periods is 0.5 ~ 30min.
Described pending water takes from the heavy rear water of water factory, uses the submersible pump with enough ranges, pending water extraction is risen to water distribution uniformity behind the inhalant region on the top of reactor, inhalant region arranges under meter, to regulate flooding velocity.
The present invention comprises the biological nitration zone of action and formation reaction zone, sand filter original filtrating area set up, and both are in same reactor, and the biological nitration zone of action set up is positioned at the top of the original filtrating area of sand filter.
The present invention has the following advantages:
1, at conventional sand filter overhung biologic packing material, be beneficial to biofilm development, give full play to biological nitration and the denitrification of microorganism, achieve the removal of ammonia nitrogen in tap water; Pending water flows through sand filter blanket after the biological action of biologic packing material, avoids bacterium, microbial film etc. to penetrate, guarantee microbial safety by filteration.
2, do not set up structures, be easy to be applied to old fish drugs and new waterworks construction.
3, with low cost, and operational management is convenient.
Accompanying drawing explanation
Fig. 1. the structural representation of the reactor of ammonia nitrogen in tap water is removed in the strengthening filter tank of the embodiment of the present invention 1, and back flushing rising pipe communicates with overflow weir.
Fig. 2. the structural representation of the reactor of ammonia nitrogen in tap water is removed in the strengthening filter tank of the embodiment of the present invention 2, and back flushing rising pipe is positioned at slightly biased lower place in the middle of biologic packing material.
Reference numeral
1. water distribution area 2. overflow weir 3. is bored a hole support or perforation plate
4. biologic packing material 5. aeration head 6. gas meter
7. air compressor 8. filter material layer 9. supporting layer
10. fixed support 11. butterfly valve 12. back flushing rising pipe
13. bearing 14 magnetic valves
Embodiment
Embodiment 1
Refer to Fig. 1.One comprises the original inhalant region of sand filter, the original water distributing area of sand filter, the original filtrating area of sand filter, the original supporting layer of sand filter, the original exhalant region of sand filter, and back-purge system, the biological nitration zone of action set up and the container of aerating system set up form the reactor that ammonia nitrogen in tap water is removed in strengthening filter tank.Sand filter original inhalant region place on the top of the container of the reactor described in forming is provided with the water inlet pipe having multiple hole, to make into water to all directions water distribution uniformity, forms water distribution area 1; The top being positioned at the described container on described water inlet pipe top is provided with and is arranged on perforation support on bearing 13 or perforation plate 3.
The described biological nitration zone of action set up is positioned at the top of the original filtrating area of sand filter, and in the below of the original inhalant region of described sand filter, be made up of the biologic packing material 4 for bio-film colonization, the aeration head 5 be connected with the air compressor 7 of the described aerating system set up by airline is installed in the below of described biologic packing material.
One end of described biologic packing material 4 is suspended on described perforation support or perforation plate 3, the other end is fixed on the fixed support 10 of setting below described biologic packing material 4, and described fixed support 10 is directly fixed together with described biologic packing material and becomes to be integrated.
The described aerating system set up is made up of aeration head 5, air compressor 7, gas meter 6, butterfly valve 11 and magnetic valve 14.
Described aeration head 5 is positioned at the below of described biologic packing material 4, described aeration head 5 is connected with described air compressor 7 by airline, and described gas meter 6 is installed on this airline, and airline between described aeration head 5 and described gas meter 6 is provided with described butterfly valve 11, the airline between described gas meter 6 and described air compressor 7 is provided with the magnetic valve 14 for controlling described in aeration mode and aeration time.
The original filtrating area of described sand filter is positioned at below described biological nitration zone of action, comprises original filter material layer 8 and original supporting layer 9, and described filter material layer can adopt the original filler of sand filter, and also replaceable is other filtrate; When changing filtrate, filtrate can be selected from one or more in quartz sand, hard coal, granulated active carbon; Next is that described supporting layer can be made up of pebbles or other material etc., and object is the loss preventing filtrate so that the filter cap blocked below supporting layer.
The original water distributing area of described sand filter is still arranged on the below of the described filter cap below the original supporting layer of described sand filter, is separated by filter cap and supporting layer; The bottom of the original water distributing area of described sand filter is provided with wash water valve, the bottom dirt of water distributing area or emptying used when reactor is stopped using need discharged.
Described back-purge system comprises backwashing pump, back flushing rising pipe 12 and back flushing water inlet pipe, and backwashing water can be water or water factory's clear water after the filter of reactor.
Exhalant region place above the water inlet pipe of the original inhalant region of sand filter is provided with the outlet pipeline communicated with overflow weir 2; This outlet pipeline is provided with ball valve, the outlet pipeline before described ball valve is provided with threeway, this threeway is connected with the back flushing rising pipe of described back-purge system, and back flushing rising pipe is provided with ball valve; Described back flushing water inlet pipe is positioned at the bottom of the original water distributing area of described sand filter.
The unit length of described biologic packing material is 25 ~ 44m/m 3, one or more in the elastic solid filler of the combined stuffing of the soft cellulose filler of the fine synthetic fibre material of hydroformylation, half soft cellulose filler of the fine synthetic fibre material of hydroformylation, the semi soft packing of polypropylene material, the semi soft packing of polyethylene material, the soft cellulose filler of the fine synthetic fibre material of hydroformylation and half soft cellulose filler of the fine synthetic fibre material of hydroformylation, the combined stuffing of activated carbon fiber material, the elastic solid filler of polyolefine material, polymeric amide material can be selected from.
Water after utilizing above-mentioned reactor for treatment water factory heavy, the ammonia nitrogen concentration that water factory sinks in rear water is 0.3 ~ 0.6mg/L.Water factory sink rear water by submersible pump be promoted to reactor top inhalant region arrange the water inlet pipe having multiple hole, via water inlet pipe to all directions water distribution uniformity, form water distribution area, water inlet is first through hanging the biological nitration zone of action set up of the elastic solid filler of the polymeric amide material of Φ 150mm, the carrier that the elastic solid filler of the polymeric amide material of selected Φ 150mm grows as microbial film, this biologic packing material surface-area is large, is beneficial to microbial growth.The packing density of described biologic packing material is 44m/m 3, be highly 1.0 ~ 1.2m.
The flow velocity of water inlet during the elastic solid filler surface growth microbial film of the polymeric amide material as the Φ 150mm described in biologic packing material is 0.5m/h, and after microbial film is formed, flow velocity during commencement of commercial operation is 2m/h.Mineralized nitrogen in water can be become nitrite, nitrate by the nitrite bacteria that above-mentioned biologic packing material grows and nitrobacteria under aerobic conditions, and the nitrite of generation can continue to change into nitrate; Denitrifying bacterium in the denitrifying bacterium under anaerobic biologic packing material grown or the original filtrating area of sand filter can utilize nitrate to carry out denitrification, nitrate transformation is become nitrogen, thus is thoroughly removed by the ammonia nitrogen in water; Meanwhile, the heterotrophic bacterium that biologic packing material grows under aerobic conditions can consume the organism in water, thus can remove the organism of part in water; In the operational process removing ammonia nitrogen in water, the aerating system in described reactor adopts continuously during growth microbial film and in operational process that in reactor, pass into pressurized air carries out aeration, and during growth microbial film, aeration rate is 0.4m 3/ h, run duration aeration rate adopts 5.7m 3/ h, for the microbial growth comprising nitrite bacteria, nitrobacteria and heterotrophic bacterium etc. provides enough dissolved oxygens; Water enters the original filtrating area of sand filter behind biological nitration zone of action, and respectively through the original filter material layer of sand filter and supporting layer, the filtrate of filter material layer adopts new quartz sand, and size distribution is 0.8 ~ 1.2mm, and filtrate thickness is 1m; Supporting layer adopts large pebble place mat successively, in case the quartz sand loss blocking filter cap that tablet footpath is less.Also a small amount of microorganism is had further by ammonium oxidation in filter material layer, simultaneously can suspension particulate matter and the microbial film that comes off in trap water by filteration, ensure biological safety, the water finally after process is discharged by water shoot after water distribution is carried out in the original water distributing area of sand filter.In above-mentioned removal tap water the reactor of ammonia nitrogen carry out water factory sink after the process of water, water outlet ammonia nitrogen concentration is 0.3 ~ 0.6mg/L, and water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
The reactor that ammonia nitrogen in tap water is removed in above-mentioned strengthening filter tank is in operation after 12 ~ 72 hours, need to carry out back flushing, before back flushing, first the direction of described biologic packing material is upwards turned over by the described bearing as transmission mechanism the direction turning 90 degrees and become and be parallel to sand filter by the direction perpendicular to sand filter, sand filter enters the normal back flushing stage; After sand filter back flushing completes, by the described bearing as transmission mechanism, described biologic packing material is turned over by the direction being parallel to sand filter the direction turning 90 degrees and become perpendicular to sand filter downwards, post-reactor recover enter normal operating phase.Backwashing water takes from water factory's clear water, and backwashing water flows into by overflow weir the back flushing rising pipe communicated with overflow weir after rinsing filtrate and biologic packing material.
Embodiment 2
Refer to Fig. 2, the structure that the reactor of ammonia nitrogen in tap water is removed in strengthening filter tank is basic identical with embodiment 1, just by the exhalant region above the water inlet pipe of the original inhalant region of sand filter, the outlet pipeline communicated with overflow weir 2 is installed, changes into, on the wall of container at the slightly biased lower place, centre of the biologic packing material described in the loading of described biological nitration zone of action, outlet pipeline is installed.
Utilize the reactor of ammonia nitrogen in above-mentioned removal tap water to carry out water factory and sink the process of rear water, the ammonia nitrogen concentration that water factory sinks in rear water is 1.0mg/L.Treatment process is basic identical with embodiment 1, the carrier that the elastic solid filler of the polymeric amide material of Φ 200mm that what the biological nitration zone of action just set up was selected is grows as microbial film, and this biologic packing material surface-area greatly, is beneficial to microbial growth.The packing density of described biologic packing material is 25m/m 2, be highly 1.0 ~ 1.2m.Filtrate in sand filter adopts new quartz sand and hard coal (volume ratio is 1:1), and filtrate thickness 1m, size distribution is 0.8 ~ 1.2mm.Supporting layer adopts large pebble place mat successively, the blocking filter cap in case the less quartz sand in tablet footpath and hard coal run off.The flow velocity of water inlet during the elastic solid filler surface growth microbial film of the acid amides material as the Φ 200mm described in biologic packing material is 0.5m/h, and after microbial film is formed, flow velocity during commencement of commercial operation is 2m/h.Aerating system in reactor adopts and continuously in reactor, passes into pressurized air and carry out aeration during growth microbial film and in operational process, and during growth microbial film, aeration rate is 5.7m 3/ h, run duration aeration rate adopts 5.7m 3/ h.
In above-mentioned removal tap water the reactor of ammonia nitrogen carry out water factory sink after the process of water, water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
The reactor that ammonia nitrogen in tap water is removed in above-mentioned strengthening filter tank is in operation after 12 ~ 72 hours, need to carry out back flushing, back-flushing method is substantially the same manner as Example 1, just backwashing water rinse filtrate with after biologic packing material by with load described in the centre of biologic packing material slightly biased under wall of container on the back flushing rising pipe 12 that is connected of the outlet pipeline installed discharge, back flushing rising pipe position is low, is beneficial to spoil disposal.
Embodiment 3
Adopt the strengthening filter tank of embodiment 2 to remove the reactor of ammonia nitrogen in tap water to carry out water factory and sink the process of rear water, the ammonia nitrogen concentration that water factory sinks in rear water is 1.5mg/L.Treatment process is basic identical with embodiment 2, what the biological nitration zone of action just set up was selected is the carrier that the soft cellulose filler of hydroformylation fibre synthetic fibre material of Φ 150 × 60mm and the combined stuffing of half soft cellulose filler of the fine synthetic fibre material of hydroformylation grow as microbial film, this biologic packing material surface-area is large, is beneficial to microbial growth.The packing density of described biologic packing material is 44m/m 2, be highly 1.0 ~ 1.2m.The old quartz sand that filtrate in sand filter adopts water factory to cross and hard coal (volume ratio is 1:1), filtrate thickness 1m, size distribution is 0.8 ~ 1.2mm.Supporting layer adopts large pebble place mat successively, the blocking filter cap in case the less quartz sand in tablet footpath and hard coal run off.The flow velocity of intaking during the combined stuffing surface growth microbial film of the fine synthetic fibre of hydroformylation as the Φ 150 × 60mm described in biologic packing material is 0.5m/h, and after microbial film is formed, flow velocity during commencement of commercial operation is 2m/h.Aerating system in reactor adopts and continuously in reactor, passes into pressurized air and carry out aeration during growth microbial film and in operational process, and during growth microbial film, aeration rate is 10m 3/ h, run duration aeration rate adopts 10m 3/ h.
In above-mentioned removal tap water the reactor of ammonia nitrogen carry out water factory sink after the process of water, water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
In above-mentioned strengthening filter tank removal tap water, the reactor of ammonia nitrogen is in operation after 12 ~ 72 hours, and need to carry out back flushing, back-flushing method is identical with embodiment 2.
Embodiment 4
Adopt the strengthening filter tank of embodiment 2 to remove the reactor of ammonia nitrogen in tap water to carry out water factory and sink the process of rear water, the ammonia nitrogen concentration that water factory sinks in rear water is 2.0mg/L.Treatment process is basic identical with embodiment 2, what the biological nitration zone of action just set up was selected is the carrier that the soft cellulose filler of hydroformylation fibre synthetic fibre material of Φ 150 × 60mm and the combined stuffing of half soft cellulose filler of the fine synthetic fibre material of hydroformylation grow as microbial film, this biologic packing material surface-area is large, is beneficial to microbial growth.The packing density of described biologic packing material is 30m/m 2, be highly 1.0 ~ 1.2m.Filtrate in sand filter adopts quartz sand and hard coal (volume ratio is 1:1), and filtrate thickness 1m, size distribution is 0.8 ~ 1.2mm.Supporting layer adopts large pebble place mat successively, the blocking filter cap in case the less quartz sand in tablet footpath and hard coal run off.The filtering velocity flow velocity of intaking during the combined stuffing surface growth microbial film of the fine synthetic fibre of hydroformylation as the Φ 150 × 60mm described in biologic packing material is 0.5m/h, and after microbial film is formed, filtering velocity flow velocity during commencement of commercial operation is 2m/h.Aerating system in reactor employing interval during growth microbial film and in operational process passes into pressurized air and carries out aeration in reactor, and during growth microbial film, aeration rate is 0.4m 3/ h, run duration aeration rate adopts 0.4m 3/ h, the intermittent time is 0.5 minute.
In above-mentioned removal tap water the reactor of ammonia nitrogen carry out water factory sink after the process of water, water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
In above-mentioned strengthening filter tank removal tap water, the reactor of ammonia nitrogen is in operation after 12 ~ 72 hours, and need to carry out back flushing, back-flushing method is identical with embodiment 2.
Embodiment 5
Adopt the strengthening filter tank of embodiment 4 to remove the reactor of ammonia nitrogen in tap water to carry out water factory and sink the process of rear water, the ammonia nitrogen concentration that water factory sinks in rear water is 1.0mg/L.Treatment process is basic identical with embodiment 4, the carrier that half soft cellulose filler of the fine synthetic fibre material of hydroformylation of what the biological nitration zone of action just set up was selected is Φ 150 × 60mm grows as microbial film, this biologic packing material surface-area is large, is beneficial to microbial growth.The packing density of described biologic packing material is 33m/m 2, be highly 1.0 ~ 1.2m.Aerating system in reactor employing interval during growth microbial film and in operational process passes into pressurized air and carries out aeration in reactor, and during growth microbial film, aeration rate is 5.7m 3/ h, run duration aeration rate adopts 5.7m 3/ h, the intermittent time is 2 minutes.
In above-mentioned removal tap water the reactor of ammonia nitrogen carry out water factory sink after the process of water, water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
In above-mentioned strengthening filter tank removal tap water, the reactor of ammonia nitrogen is in operation after 12 ~ 72 hours, and need to carry out back flushing, back-flushing method is identical with embodiment 4.
Embodiment 6
Adopt the strengthening filter tank of embodiment 5 to remove the reactor of ammonia nitrogen in tap water to carry out water factory and sink the process of rear water, the ammonia nitrogen concentration that water factory sinks in rear water is 2mg/L.Treatment process is basic identical with embodiment 5, the carrier that the elastic solid filler of polyolefine material that what the biological nitration zone of action just set up was selected is grows as microbial film, and this biologic packing material surface-area greatly, is beneficial to microbial growth.The packing density of described biologic packing material is 33m/m 2, be highly 1.0 ~ 1.2m.Aerating system in reactor employing interval during growth microbial film and in operational process passes into pressurized air and carries out aeration in reactor, and during growth microbial film, aeration rate is 5.7m 3/ h, run duration aeration rate adopts 5.7m 3/ h, the intermittent time is 30 minutes.
In above-mentioned removal tap water the reactor of ammonia nitrogen carry out water factory sink after the process of water, water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
In above-mentioned strengthening filter tank removal tap water, the reactor of ammonia nitrogen is in operation after 12 ~ 72 hours, and need to carry out back flushing, back-flushing method is identical with embodiment 4.
Embodiment 7
Adopt the strengthening filter tank of embodiment 6 to remove the reactor of ammonia nitrogen in tap water to carry out water factory and sink the process of rear water, the ammonia nitrogen concentration that water factory sinks in rear water is 2mg/L.Treatment process is basic identical with embodiment 6, the carrier that the combined stuffing of activated carbon fiber material that what the biological nitration zone of action just set up was selected is grows as microbial film, and this biologic packing material surface-area greatly, is beneficial to microbial growth.The packing density of described biologic packing material is 33m/m 2, be highly 1.0 ~ 1.2m.Aerating system in reactor employing interval during growth microbial film and in operational process passes into pressurized air and carries out aeration in reactor, and during growth microbial film, aeration rate is 10m 3/ h, run duration aeration rate adopts 10m 3/ h, the intermittent time is 30 minutes.
In above-mentioned removal tap water the reactor of ammonia nitrogen carry out water factory sink after the process of water, water outlet ammonia nitrogen concentration, lower than 0.5mg/L, reaches " national drinking water sanitary standard (GB5749-2006) " requirement.
In above-mentioned strengthening filter tank removal tap water, the reactor of ammonia nitrogen is in operation after 12 ~ 72 hours, and need to carry out back flushing, back-flushing method is identical with embodiment 4.

Claims (9)

1. strengthen the reactor that ammonia nitrogen in tap water is removed in filter tank for one kind, comprise the original inhalant region of sand filter, the original water distributing area of sand filter, the original filtrating area of sand filter, original supporting layer of the original filtrating area of sand filter, the original exhalant region of sand filter, and back-purge system, the biological nitration zone of action set up and the aerating system set up; It is characterized in that:
One comprises the original inhalant region of sand filter, the original water distributing area of sand filter, the original filtrating area of sand filter, original supporting layer of the original filtrating area of sand filter, the reactor described in container formation of the original exhalant region of sand filter, and sand filter original inhalant region place on the top of the container of the reactor described in forming is provided with the water inlet pipe having multiple hole; The top being positioned at the described container on described water inlet pipe top is provided with perforation support or perforation plate;
The described biological nitration zone of action set up is positioned at the top of the original filtrating area of sand filter, and in the below of the original inhalant region of described sand filter, be made up of the biologic packing material for bio-film colonization, the aeration head be connected with the air compressor of the described aerating system set up by airline is installed in the below of described biologic packing material;
One end of described biologic packing material is suspended on described perforation support or perforation plate, and the other end is fixed on the fixed support that arranges below described biologic packing material;
Described back-purge system comprises backwashing pump, back flushing rising pipe and back flushing water inlet pipe;
The wall of container at the lower middle place of the biologic packing material described in loading in described biological nitration zone of action is provided with outlet pipeline; Or the exhalant region place above the water inlet pipe having multiple hole of described sand filter original inhalant region place setting is provided with the outlet pipeline communicated with overflow weir; Described outlet pipeline is provided with ball valve, the outlet pipeline before described ball valve is provided with threeway, this threeway is connected with the back flushing rising pipe of described back-purge system, and back flushing rising pipe is provided with ball valve; Described back flushing water inlet pipe is positioned at the bottom of the original water distributing area of described sand filter;
Described perforation support or perforation plate are mounted on the bearing as transmission mechanism.
2. the reactor of ammonia nitrogen in tap water is removed in strengthening filter tank according to claim 1, it is characterized in that: the described aerating system set up is made up of aeration head, air compressor, gas meter, butterfly valve and magnetic valve;
Described aeration head is positioned at the below of described biologic packing material, described aeration head is connected with described air compressor by airline, and on this airline, described gas meter is installed, and airline between described aeration head and described gas meter is provided with described butterfly valve, the airline between described gas meter and described air compressor is provided with the magnetic valve for controlling described in aeration mode and aeration time.
3. the reactor of ammonia nitrogen in tap water is removed in strengthening filter tank according to claim 1, it is characterized in that: the original filtrating area of described sand filter comprises original filter material layer and original supporting layer; Described filter material layer adopts the original filler of sand filter, or is selected from one or more in quartz sand, hard coal, granulated active carbon.
4. the reactor of ammonia nitrogen in tap water is removed in strengthening filter tank according to claim 1, it is characterized in that: described biologic packing material is selected from one or more in the elastic solid filler of the combined stuffing of the soft cellulose filler of the fine synthetic fibre material of hydroformylation, half soft cellulose filler of the fine synthetic fibre material of hydroformylation, the semi soft packing of polypropylene material, the semi soft packing of polyethylene material, the soft cellulose filler of the fine synthetic fibre material of hydroformylation and half soft cellulose filler of the fine synthetic fibre material of hydroformylation, the combined stuffing of activated carbon fiber material, the elastic solid filler of polyolefine material, polymeric amide material.
5. the reactor utilizing the strengthening filter tank described in claim 1 ~ 4 any one to remove ammonia nitrogen in tap water carries out the method removing ammonia nitrogen in tap water, it is characterized in that: to stream water intake mode under employing, the water inlet pipe having multiple hole that first pending water arranged by the inhalant region place on reactor top enters the inhalant region of reactor, water distribution area is formed to all directions water distribution uniformity via water inlet pipe, then water inlet is through hanging the biological nitration zone of action set up of biologic packing material, mineralized nitrogen in water is become nitrite with nitrobacteria by the nitrite bacteria that biologic packing material grows under aerobic conditions, nitrate, the nitrite generated continues to change into nitrate, denitrifying bacterium in the denitrifying bacterium under anaerobic biologic packing material grown or the original filtrating area of sand filter utilizes nitrate to carry out denitrification, and nitrate transformation is become nitrogen, and by the ammonia nitrogen removal in water, meanwhile, the heterotrophic bacterium that biologic packing material grows under aerobic conditions consumes the organism in water, removes the organism of part in water, in the operational process removing ammonia nitrogen in water, the aerating system in described reactor is continuously or off and on to aeration in water, and for comprising nitrite bacteria, the microbial growth of nitrobacteria and heterotrophic bacterium provides enough dissolved oxygens, water enters the original filtrating area of sand filter behind biological nitration zone of action, respectively through filter material layer, supporting layer, microorganism in filter material layer is further by ammonium oxidation, simultaneously by suspension particulate matter in filteration trap water and the microbial film that comes off, the water after process is discharged by water shoot after water distribution is carried out in the original water distributing area of sand filter.
6. method according to claim 5, is characterized in that: the hydraulic detention time of described water inlet through the biological nitration zone of action set up hanging biologic packing material is 0.5 ~ 2 hour.
7. method according to claim 5, is characterized in that: the aerating system in described reactor continuously or off and on to aeration in water, when taking continuous aeration, aeration rate is 0.4 ~ 10m 3/ h; When taking intermittent aeration, aeration rate is 0.4 ~ 10m 3/ h, aeration gap periods is 0.5 ~ 30min.
8. method according to claim 5, it is characterized in that: the reactor that ammonia nitrogen in tap water is removed in described strengthening filter tank needs after 12 ~ 72 hours to carry out back flushing in operation, before back flushing, first the direction of described biologic packing material is upwards turned over by the described bearing as transmission mechanism the direction turning 90 degrees and become and be parallel to sand filter by the direction perpendicular to sand filter, sand filter enters the normal back flushing stage; After sand filter back flushing completes, by the described bearing as transmission mechanism, described biologic packing material is turned over by the direction being parallel to sand filter the direction turning 90 degrees and become perpendicular to sand filter downwards, post-reactor recover enter normal operating phase.
9. method according to claim 8, is characterized in that: described back flushing utilizes the original back-purge system of sand filter, to be arranged on by back flushing rising pipe above water distribution area and to communicate with overflow weir; Or back flushing rising pipe is located on the wall of container at the lower middle place of loading biologic packing material, when back flushing, backwashing water is discharged by back flushing rising pipe.
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