CN102303939A - Front, middle and rear ozone and central aerated biological activated carbon water supply treatment method - Google Patents
Front, middle and rear ozone and central aerated biological activated carbon water supply treatment method Download PDFInfo
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Abstract
The invention discloses a front, middle and rear ozone and central aerated biological activated carbon water supply treatment method. The method comprises the following steps: (1) causing raw water to enter a front ozone contact pool, and introducing ozone into the pool for preoxidation; (2) adding a coagulant and a coagulant aid into effluent in step (1), sufficiently mixing and carrying out coagulation reaction and precipitation in a coagulation precipitation pool; (3) introducing effluent in step (2) into a middle ozone contact pool, and introducing ozone into the pool for oxidation; (4) introducing effluent in step (3) into an aerated biological activated carbon filter, and blasting and aerating the filter; (5) adding chlorine into effluent in step (4), then entering a rear ozone contact pool, and introducing ozone into the pool to disinfect; and (6) causing effluent in step (5) to flow into a sand filtering pool, and filtering killed microorganisms and residual turbid matters in water to obtain treated clear water. In the method, an ozone adding mode is optimized, and the sand filtering pool is brought up the rear, thereby improving the effects on removing ammonia nitrogen and organic matters and killing microorganisms as well as lowering the total ozone adding rate.
Description
Technical field
The present invention relates to water-treatment technology field, particularly relate to the technical field of micro-polluted drinking water water source purifying, ozone and mid-aerated biological activated carbon feedwater treatment method before, during and after being specifically related to.
Background technology
China generally adopts " former water → coagulation → deposition → sand filtration → sterilization " shown in Figure 1 conventional water-purifying process to produce tap water at present.The contaminated degree in urban drinking water water source is serious day by day in recent years, and along with the raising of China's Urban water supply water quality standard, is that the conventional water-purifying process of major function has been difficult to adapt to existing water source and water quality standard to go turbid and sterilization.Therefore, must develop and new give the resource of water supply of water technology, improve water supply quality to adapt to deterioration.
To suffering ammonia nitrogen and organism micro polluted source, biological treatment is to remove ammonia nitrogen and effectively organic and the most economic method.Therefore; Be everlasting both at home and abroad at present and increase the feedwater biological treatment in the conventional water-purifying process; Representational technology is traditional forward and backward ozone shown in Figure 2 and rearmounted biological activated carbon feedwater advanced water purifying technology, and its water purification flow path is " a former water → preceding ozone contact tank → coagulative precipitation tank → sand filter → back ozone contact tank → biological activated carbon filter → chlorination → clean water basin ".Before add ozone and work hydrobionts such as killing shellfish, remove solvability iron and manganese, colourity and algae, minimizing trichloromethane precursor, remove to smell, help and coagulate and the preoxidation effect of former water preliminarily pasteurized.The turbidity material in the water has been removed in the sand filtration water outlet basically, in the ozone contact tank of back, dissolves in ozone, thoroughly kills various pathogenic microorganisms in the former water, further larger molecular organics is oxidized to small-molecule substance, improves oxygen in water simultaneously.Biological activated carbon filter is positioned at the clean unit end, is used for further absorption, degradation of organic substances and nitrated ammonia nitrogen.If when winter, the surface water temperature was lower than 5 ℃, the biochemical action of biological activated carbon filter seriously undermined, need to rely on the adsorptive power of particle charcoal to remove; The non-degradable organism then relies on the absorption of particle charcoal to remove fully; The particle charcoal does not have adsorption basically to ammonia nitrogen, and nitrated ammonia nitrogen mainly relies on the biochemical action of particle charcoal.When face of land water temp more than 5 ℃ the time, the particle charcoal can obtain necessary regeneration by biochemical organism through what biochemical degradation was adsorbed, recovers the adsorptive power to labile organic compound.This technology since the large-scale application, has obtained well recognized at home aspect water correction.No matter this technology is the back ozone oxidation; Still charcoal absorption is with biochemical; All directly to the residual micro polluting substance of common process water outlet; Purification efficiency is high; And it is less to keep the required ozone dosage of after-odour oxygen set(ting)value in the water; Thereby the turbidity that cuts filter through biological activated carbon filter has seldom prolonged flushing cycle greatly, so running cost reduces.But being miniature hydrocoles, biological activated carbon filter provides more than the suitable growth conditions of conventional water treatment process; Formed microorganism → protozoon → macroinvertebrate biologic chain; There is the miniature organism penetration phenomenon in the biological activated carbon filter water outlet, and especially outstanding in subtropical zone, China south.Though miniature organism can be killed through the end sterilization, the naked eyes visible possibly appear in its water outlet, and water quality has been constituted potential safety hazard.
Summary of the invention
The objective of the invention is to overcome existing ozone-BAC process to the deficiency that existed by ammonia nitrogen and organism micro-polluted drinking water water source; Ozone-BAC process the method that provides a kind of ozone dosing method to be optimized is to promote the water supply quality of waterworks.
The object of the invention is realized through following technical scheme:
Before, during and after ozone and mid-aerated biological activated carbon feedwater treatment method; Its water purification flow path is " a former water → preceding ozone contact tank → coagulative precipitation tank → middle ozone contact tank → aerated biological activated carbon filter tank → back ozone (associating chlorination) contact tank →-sand filter → clean water basin "; As shown in Figure 3, may further comprise the steps:
(1) former water gets into preparatory ozone contact tank, in the pond, adds ozone and carries out preoxidation;
(2) water outlet of step (1) gets into coagulative precipitation tank dosing coagulant and coagulant aids before, behind the thorough mixing, in coagulative precipitation tank, carries out coagulating and deposition.
(3) ozone contact tank during the water outlet of step (2) gets into adds ozone and carries out oxidation in the pond;
(4) water outlet of step (3) gets into the aerated biological activated carbon filter tank; And this pond carried out blast aeration; Oxygen supply on the one hand; Promote on the other hand in the water that biological activated carbon contacts in the Micropollutants and filter tank; Under biomembrane biochemistry and charcoal absorption effect, remove ammonia nitrogen, organism and part heavy metal in the water;
(5) the water outlet chlorination of step (4) gets into the back ozone contact tank then, in the pond, adds ozone and carries out disinfection;
(6) water outlet of step (5) flows into sand filter, and sand filter is rearmounted, the miniature organism that cuts remaining turbidity in the drainage and killed, the clear water after obtaining handling.
The former water of said step (1) gets into preparatory ozone contact tank; In the pond, add ozone and carry out preoxidation; Ozone adds rate usually in 0.0～1.5mg/L scope; Specifically should according to the water quality condition of former water and combine preoxidation to remove solvability iron and manganese, colourity and algae, minimizing trichloromethane precursor and improve stink and the test-results of coagulation condition definite; Also can select for use with reference to the experience under the similar condition of water quality, be 2～5min duration of contact.When source quality is good, when algae, trichloromethane precursor, stink and colourity can not cause the corresponding index of output water not reach drinking water sanitary standard, the preceding ozone rate of adding can be taken as 0mg/L.If do not need preceding ozone for a long time, then do not establish preceding ozone contact tank.
Ozone contact tank during said step (2) settling tank water outlet gets into; In the pond, add ozone and carry out oxidation; Ozone adds rate, and (preferable range is 0.1～1.5mg/L) in 0.0～1.5mg/L scope usually; Specifically should and combine the difficult decomposing organic matter test-results of oxidation to confirm according to the water quality condition of pending water; Also can select for use with reference to the experience under the similar condition of water quality, be 3～6min duration of contact.When difficult decomposing organic matter, stink and colourity in this step influent quality can not cause the corresponding index of output water not reach drinking water sanitary standard, the middle ozone rate of adding can be taken as 0mg/L.If ozone in not needing is not for a long time then established middle ozone contact tank.
The water outlet of said step (3) gets into the aerated biological activated carbon filter tank, under biomembrane biochemistry and charcoal absorption effect, removes ammonia nitrogen, organism and part heavy metal in the water.As shown in Figure 4; The aerated biological activated carbon filter tank (is application number 200910193564.0; Name is called the aerated biological activated carbon filter tank and uses the carbon filtering pool of putting down in writing in the method for its polished feedwater) mistakes stream mode employing flow lifting type; Water inlet gets into distributing flue 2 from total inlet channel 1; Get into aerated biological activated carbon filter tank water and air distributing trough 4 through water inlet pipe 3; Allocating filter tank body 5 into upwards flows; Be evenly distributed to each single hole film aeration filter head 6; Pass filter plate 7, cobble bed course 8 and filter material layer, get into out water channel 11 then; Filtrate should adopt the double bunk composite filtering material, and lower floor is thickness 0.5～2.0m light ceramic layer 9, and the upper strata is thickness 2.0～3.5m granulated active carbon layer 10, and the total empty bench grafting time of touching of treating water and filtrate should be adopted 6～20min, and empty bed filtering velocity is 12～20m/h.Pass through the air distribution and water distribution groove 4 in aerated conduit 13 entering filter tanks from the pressurized air of aeration blower 12; Allocate filter tank body 5 then into; Below filter plate 7, form air cushion layer; Fenestra through single hole film aeration filter head 6 gets into the filter handle; Again with treat drainage upper reaches aeration in the same way, for the microbial film of growth on make pottery bed 9 and the charcoal bed 10 provides dissolved oxygen and disturbance mass transfer.The aeration gas-water ratio is usually 0.0～0.5: (preferable range is 0.1～0.5 to 1 scope: 1); When ammonia nitrogen during greater than 3.5mg/L; The gas-water ratio range extension is that 0～0.8: 1 (preferable range is 0.2～0.8: 1); Specifically should also combine removal ammonia nitrogen and organic test result to confirm according to the water quality condition of former water, also can select for use with reference to the experience under the similar condition of water quality.
The washing method of washing by water on the aerated biological activated carbon filter tank in the said step (4): according to shown in Figure 4, open wash-water pump 19, wash-down water gets into water and air distributing troughs 4 through water washpipe 20, allocates filter tank body 5 into and upwards flows, and is evenly distributed to each single hole film aeration filter head 6; The last qi of chong channel ascending adversely washing method in aerated biological activated carbon filter tank: open flushing gas blower 14; Flow through gas flushing pipe 15 of purge gas gets into water and air distributing troughs 4; Allocate filter tank body 5 into, below filter plate 7, form air cushion layer, upwards mobile through the fenestra entering filter handle of single hole film aeration filter head 6; The following purging method in aerated biological activated carbon filter tank: the valve of closing water inlet pipe 3; Open flushing gas blower 14; Flushing out air gets into water and air distributing trough 4 through gas flushing main 16 and perforation gas-distribution pipe 17; Allocate filter tank body 5 into; Below filter plate 7, form air cushion layer; Fenestra through single hole film aeration filter head 6 gets into the filter handle and upwards flows, and at the bottom of the pond inertia deposition in water and air distributing district also 17 blast aerations of perforation gas-distribution pipe down quilt disturbed; After several minutes, open blow-off valve 18, the inertia deposition at the bottom of filtering layer and the pond in the water and air distributing district drains into outside the pond through blow-down pipe 18 with wash-down water.
The water outlet chlorination of said step (4) gets into the back ozone contact tank then, in the pond, adds ozone and carries out chlorine and ozone combined disinfection.Chlorine dosage should according to sand filter water outlet chlorine residue (free chlorine) satisfy output water standard>=0.3mg/L but≤control of 4mg/L requires to confirm.Ozone adds rate, and (preferable range is 0.1～1.0mg/L) in 0.0～1.0mg/L scope usually; Specifically should confirm according to kind, combination inactivation of viruses, miniature organism and the disinfection test result of microorganism in the output water; Also can select for use with reference to the experience under the similar condition of water quality, be 6～15min duration of contact.When the aerated biological activated carbon water outlet does not have the very strong miniature organism of resistance to chlorine, when relying on chlorination can solve miniature organism to penetrate the sand filter problem, the back ozone rate of adding can be taken as 0mg/L.If do not need back ozone for a long time, then do not establish the back ozone contact tank.
The water outlet of said step (5) gets into sand filter, and sand filter is rearmounted, not only removes the remaining turbidity in the water, also cuts the miniature organism of having been killed by ozone and chlorine in the drainage simultaneously, has overcome the defective that there is biological leakage in existing ozone-BAC process.
The present invention compared with prior art has following advantage and beneficial effect:
1, compare with rearmounted biological activated carbon feedwater advanced water purifying technology with traditional forward and backward ozone, the present invention has two advantages:
(1) sand filter is changed into before and bringing up the rear from being positioned at " back ozone contact tank → biological activated carbon filter → chlorination ", cut remaining turbidity and the miniature organism of having been killed in the drainage, prevent the miniature organism leakage.It is to be noted that the live body miniature organism can penetrate sand filter,, remove through sand filtration again so chlorination is killed it before sand filter.
(2) " back ozone contact tank → biological activated carbon filter → chlorination " changed into " middle ozone contact tank → aerated biological activated carbon filter tank → chlorination → back ozone contact tank "; Optimize the ozone dosing method: middle ozone is used for the oxygenolysis hardly degraded organic substance, the high strength burst organic contamination of reply water source; Substitute back ozone to the carbon filtering pool oxygen supply with blast aeration, both improved biological activated carbon filter, reduced ozone again and added rate ammonia nitrogen and organic clearance; Back ozone associating chlorination not only can sterilization, can also further kill the strong miniature organism of resistance to chlorine such as chironomus larvas, nematode, Cyclop and wheel animalcule etc., prevents that more effectively miniature organism from leaking.
2, compare with the conventional processing combination process with Biological Pretreatment, the present invention has two advantages:
(1) Biological Pretreatment is positioned at before the conventional treatment process, directly handles former water.The mid-aerated biological activated carbon of the present invention filter tank is between the settling tank and sand filter of conventional treatment process; Both can avoid raw water turbidity to increase the weight of the filtration burden of biological filter; Hinder biomembranous biochemical action, can stop miniature organism to penetrate through sand filter again.Therefore, for newly-built water factory, arrange that between coagulating sedimentation unit and sand filter the biological filter is the reasonable technology flow process.Wait to filter the primary water turbidity and reduce significantly, help the operational management of BAF, the requirement of back flushing has also been reduced standard than former water.
(2) Biological Pretreatment is directly handled former water, because raw water turbidity is higher, can't adopt granulated active carbon as the microorganism colonization filler.And the coagulating sedimentation delivery turbidity is usually in 1.0～2.0NTU scope; For flow lifting type double bunk BAF; Can guarantee the water turbidity＜1.0NTU that goes into of upper strata filter bed; Possessed the condition that adopts the granulated active carbon filtrate; The granulated active carbon filtrate is better to the biological treatment effect of micro-polluted water, and the ability that the burst of reply water source is polluted is strengthened greatly.
Description of drawings
Fig. 1 is a feedwater conventional treatment process schematic flow sheet.
Fig. 2 is traditional forward and backward ozone and rearmounted biological activated carbon feedwater advanced water purifying process flow diagram.
Fig. 3 is ozone and a mid-aerated biological activated carbon process flow diagram before, during and after the present invention.
Fig. 4 is the mid-aerated biological activated carbon filter tank synoptic diagram among the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail.
As shown in Figure 3; Before, during and after ozone and mid-aerated biological activated carbon technology, comprise successively preceding ozone contact tank, coagulative precipitation tank, middle ozone contact tank, aerated biological activated carbon filter tank, back ozone contact tank, sand filter and clean water basin through pipe connection; Before ozone contact tank, middle ozone contact tank and back ozone contact tank all with ozone apparatus for initiating pipe connection, through switch valve regulated ozone dosage accordingly separately; Coagulative precipitation tank dosing coagulant polymerize aluminum chloride makes most turbidity materials flocculate than big flocculating body, and then deposition is removed; For mid-aerated biological activated carbon; With gas blower it is carried out an amount of aeration; For biological degradation provides sufficient oxygen source; Practice thrift the ozone dosage greatly; Simultaneously, aerated biological activated carbon is positioned over before the sand filter promptly mid-aerated biological activated carbon; Then can make excessive demands the control activated carbon filter and keep low delivery turbidity, select for the biological activated carbon filter aeration provides multiple gas-water ratio; Add chlorine to flowing into back ozone contact tank water before, ozone and chlorine combined disinfection, rearmounted sand filter then both guarantees the turbidity of final outflow water as bringing up the rear, killed miniature organism before assurance cuts and filters again.
Testing former water ammonia nitrogen concentration is 0.6～3.8mg/L, COD
Mn2.7～6.5mg/L.
As shown in Figure 3, a kind of before, during and after ozone and mid-aerated biological activated carbon technology, may further comprise the steps:
(1) ozone contact tank before former water gets into adds ozone former water is carried out preoxidation in the pond, calculate by former volume of water, and the ozone rate of adding is 0.5mg/L, and be 5min duration of contact;
(2) step (1) water outlet gets into the preceding dosing coagulant polymerize aluminum chloride of coagulation reaction tank, calculates by former volume of water, and dosage is 80mg/L, behind the thorough mixing, carries out 10～15min coagulating and deposition.Influent turbidity is 20～40NTU, and delivery turbidity is 1.0～1.7NTU;
(3) ozone contact tank during step (2) water outlet gets into adds ozone in the pond, hardly degraded organic substance in the oxygenolysis water, and be 6min duration of contact.Get into the aerated biological activated carbon filter tank then, under the situation that the oxygen supply of air-blast system aeration is arranged with the pond in the biological activated carbon filtrate fully contact, water quality pollutant is adsorbed and biochemical degradation; Specifically be; Water gets into distributing flue from total inlet channel; Get into aerated biological activated carbon filter tank water and air distributing trough through water inlet pipe; Allocating the filter tank body into upwards flows; Be evenly distributed to each single hole film aeration filter head; Pass filter plate, cobble bed course, light ceramic layer and granulated active carbon layer, the thickness of haydite layer and charcoal layer is respectively 1m and 3m.The turbidity of water is 1.7～0.8NTU in the haydite layer, and the turbidity of water is 0.8～0.3NTU in the charcoal layer.The total empty bench grafting of treating water and filtrate touches time 15min, and empty bed filtering velocity is 16m/h.Get into the air distribution and water distribution groove in filter tank from the pressurized air of aeration blower from aerated conduit, below filter plate, form air cushion layer, the fenestra through single hole film aeration filter head with treat drainage upper reaches aeration in the same way, for microbial film on the filtrate provides dissolved oxygen and disturbance mass transfer.Water outlet imports the back ozone contact tank, in the pond, adds chlorine and ozone and kills the strong miniature organism of resistance to chlorine, and be 10min duration of contact.Get into sand filter then.
In the middle ozone rate of adding is 2.5mg/L, and the aerated biological activated carbon filter tank is under the aeration situation, sand filter water outlet ammonia nitrogen and COD
MnBe respectively 0.1～2.5mg/L and 0.8～2.3mg/L; In the middle ozone rate of adding is 0, and aerated biological activated carbon filter tank aeration air water volume ratio is under 0.5: 1 situation, sand filter water outlet ammonia nitrogen and COD
MnBe respectively 0.1～0.2mg/L and 0.9～1.9mg/L; In the middle ozone rate of adding is 1.0mg/L, and aerated biological activated carbon filter tank aeration air water volume ratio is under 0.5: 1 situation, sand filter water outlet ammonia nitrogen and COD
MnBe respectively 0.1～0.2mg/L and 0.7～1.4mg/L.Show that biological activated carbon filter and aeration combination ratio is removed ammonia nitrogen with middle combined with ozone and organic matter efficiency is higher, especially be wanting in distance significantly at the removal ammonia nitrogen.Organic removal rate can be further improved in aerated biological activated carbon filter tank and middle combined with ozone.
The water outlet of aerated biological activated carbon filter tank not chlorination and back ozone, do not add back ozone but chlorination 2.1mg/L to the about 1.5～1.6mg/L of sand filter water outlet chlorine residue and add back ozone 1.0mg/L and chlorination 2.1mg/L to three kinds of situation of the about 1.5～1.6mg/L of sand filter water outlet chlorine residue; The miniature organism quantity of sand filter water outlet is seen table 1 with local common process waterworks sand filter water outlet comparing result.
Table 1 sand filtration filter tank water outlet miniature organism density contrast unit: individual/m
3
Can find out that from table 1 data directly do not get into the sand filter filtration if the biological activated carbon filter water outlet is not sterilized, then sand filter water outlet miniature organism quantity is many, and is basic identical with biological activated carbon filter water outlet miniature organism density.During biological activated carbon filter water outlet chlorination 2.3mg/L; About 1.5～the 1.6mg/L of the corresponding chlorine residue of sand filter water outlet; And local common process waterworks sand filter water outlet chlorine residue 0.1～0.5mg/L only; So present method chlorine dosage before sand filter is big; It is strong to kill ability, and water outlet miniature organism density reduces more than 90%.Further add ozone behind the 1.0mg/L, then the sand filter water outlet detects less than miniature organism fully, is fit to directly drink.
Embodiment 2
Testing former water ammonia nitrogen concentration is 0.2～0.8mg/L, COD
Mn1.7～4.5mg/L.
As shown in Figure 3, a kind of before, during and after ozone and mid-aerated biological activated carbon technology, may further comprise the steps:
(1) ozone contact tank before former water gets into adds ozone former water is carried out preoxidation in the pond, calculate by former volume of water, and the ozone rate of adding is 0～0.5mg/L, and be 5min duration of contact;
(2) step (1) water outlet gets into the preceding dosing coagulant polymerize aluminum chloride of coagulation reaction tank, calculates by former volume of water, and dosage is 30mg/L, behind the thorough mixing, carries out coagulating and deposition.Influent turbidity is 20～40NTU, and delivery turbidity is 0.9～1.5NTU, and preceding ozone effect of flocculant is not obvious, can use other method for pre-oxidizing to replace;
(3) ozone contact tank during step (2) water outlet gets into adds ozone in the pond, hardly degraded organic substance in the oxygenolysis water, and be 5min duration of contact.Get into the aerated biological activated carbon filter tank then, under the situation that the oxygen supply of air-blast system aeration is arranged with the pond in the biological activated carbon filtrate fully contact, water quality pollutant is adsorbed and biochemical degradation; Specifically be; Water gets into distributing flue from total inlet channel; Get into aerated biological activated carbon filter tank water and air distributing trough through water inlet pipe; Allocating the filter tank body into upwards flows; Be evenly distributed to each single hole film aeration filter head; Pass filter plate, cobble bed course, light ceramic layer and granulated active carbon layer, the thickness of haydite layer and charcoal layer is respectively 1m and 3m.The turbidity of water is 1.5～0.6NTU in the haydite layer, and the turbidity of water does in the charcoal layer, 0.6～0.2NTU.The total empty bench grafting of treating water and filtrate touches time 15min, and empty bed filtering velocity is 16m/h.Get into the air distribution and water distribution groove in filter tank from the pressurized air of aeration blower from aerated conduit, below filter plate, form air cushion layer, the fenestra through single hole film aeration filter head with treat drainage upper reaches aeration in the same way, for microbial film on the filtrate provides dissolved oxygen and disturbance mass transfer.Water outlet imports the back ozone contact tank, in the pond, adds chlorine and ozone and kills the strong miniature organism of resistance to chlorine, and be 10min duration of contact.Get into sand filter then.
In the middle ozone rate of adding is 1.5mg/L, and the aerated biological activated carbon filter tank is under the aeration situation, sand filter water outlet ammonia nitrogen and COD
MnBe respectively 0.1～0.3mg/L and 0.8～1.2mg/L; In the middle ozone rate of adding is 0, and aerated biological activated carbon filter tank aeration air water volume ratio is under 0.2: 1 situation, sand filter water outlet ammonia nitrogen and COD
MnBe respectively 0.1～0.2mg/L and 0.7～0.9mg/L; In the middle ozone rate of adding is 1.0mg/L, and aerated biological activated carbon filter tank aeration air water volume ratio is under 0.2: 1 situation, sand filter water outlet ammonia nitrogen and COD
MnBe respectively 0.1～0.2mg/L and 0.7～0.9mg/L.Show that biological activated carbon filter and aeration combination ratio are removed ammonia nitrogen with middle combined with ozone and organic matter efficiency is higher.With aerated biological activated carbon filter tank and middle combined with ozone to improving organic removal rate DeGrain, ozone contact tank in can cancelling.
The water outlet of aerated biological activated carbon filter tank not chlorination and back ozone, do not add back ozone but chlorination 2.1mg/L to the about 1.5～1.6mg/L of sand filter water outlet chlorine residue and add back ozone 1.0mg/L and chlorination 1.8mg/L to three kinds of situation of the about 1.5mg/L of sand filter water outlet chlorine residue; The miniature organism quantity of sand filter water outlet is close with table 1 data with local common process waterworks sand filter water outlet comparing result.Show that present method chlorine dosage before sand filter is big, it is strong to kill ability, and sand filter water outlet miniature organism density reduces more than 90%.Do not add back ozone and can guarantee water supply up to standard.If further add ozone behind the 1.0mg/L, then the sand filter water outlet detects less than miniature organism fully, is fit to directly drink.
Claims (5)
1. ozone and mid-aerated biological activated carbon feedwater treatment method is characterized in that before, during and after, may further comprise the steps:
(1) ozone contact tank before former water gets into adds ozone and carries out preoxidation in the pond;
(2) the water outlet dosing coagulant and the coagulant aids of step (1) behind the thorough mixing, carry out coagulating and deposition in coagulative precipitation tank;
(3) ozone contact tank during the water outlet of step (2) gets into adds ozone and carries out oxidation in the pond;
(4) water outlet of step (3) gets into the aerated biological activated carbon filter tank; And this pond carried out blast aeration; Oxygen supply on the one hand; Promote on the other hand in the water that biological activated carbon contacts in the Micropollutants and filter tank; Under biomembrane biochemistry and charcoal absorption effect, remove ammonia nitrogen, organism and part heavy metal in the water;
(5) the water outlet chlorination of step (4) gets into the back ozone contact tank then, in the pond, adds ozone and carries out disinfection;
(6) water outlet of step (5) flows into sand filter, the miniature organism that cuts remaining turbidity in the drainage and killed, the clear water after obtaining handling.
2. method according to claim 1; It is characterized in that; Said step (1) ozone adds rate usually in 0.0～1.5mg/L scope; Specifically should according to the water quality condition of former water and combine preoxidation to remove solvability iron and manganese, colourity and algae, minimizing trichloromethane precursor and improve stink and the test-results of coagulation condition definite; Also can select for use with reference to the experience under the similar condition of water quality, be 2～5min duration of contact; When source quality is good, when algae, trichloromethane precursor, stink and colourity can not cause the corresponding index of output water not reach drinking water sanitary standard, the preceding ozone rate of adding can be taken as 0mg/L; If do not need preceding ozone for a long time, then do not establish preceding ozone contact tank.
3. method according to claim 2; It is characterized in that; Said step (3) ozone adds rate usually in 0.0～1.5mg/L scope; Specifically should and combine the difficult decomposing organic matter test-results of oxidation to confirm according to the water quality condition of pending water; Also can select for use with reference to the experience under the similar condition of water quality, be 3～6min duration of contact; When difficult decomposing organic matter, stink and colourity in this step influent quality can not cause the corresponding index of output water not reach drinking water sanitary standard, the middle ozone rate of adding can be taken as 0mg/L; If ozone in not needing is not for a long time then established middle ozone contact tank.
4. method according to claim 3; It is characterized in that; Said step (4) aeration gas-water ratio is usually 0.0～0.5: 1 scope; When ammonia nitrogen during greater than 3.5mg/L; The gas-water ratio range extension is 0～0.8: 1; Specifically should also combine removal ammonia nitrogen and organic test result to confirm according to the water quality condition of former water, also can select for use with reference to the experience under the similar condition of water quality.
5. method according to claim 4 is characterized in that, said step (5) chlorine dosage should according to sand filter water outlet chlorine residue (free chlorine) satisfy output water standard>=0.3mg/L but≤control of 4mg/L requires to confirm; Ozone adds rate usually in 0.0～1.0mg/L scope, specifically should confirm that also can select for use with reference to the experience under the similar condition of water quality, be 6～15min duration of contact according to kind, combination inactivation of viruses, miniature organism and the disinfection test result of microorganism in the output water; When the aerated biological activated carbon water outlet does not have the very strong miniature organism of resistance to chlorine, when relying on chlorination can solve miniature organism to penetrate the sand filter problem, the back ozone rate of adding can be taken as 0mg/L; If do not need back ozone for a long time, then do not establish the back ozone contact tank.
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102633409A (en) * | 2012-04-26 | 2012-08-15 | 复旦大学 | Technological method for controlling disinfection by-product and pathogenic microorganism risk of drinking water |
| CN103435229A (en) * | 2013-08-28 | 2013-12-11 | 杭州天创环境科技股份有限公司 | Treatment methodMethod for treating to wastewater by using membrane coagulation reactor-ozone-biological activated carbon technique |
| CN103435179A (en) * | 2013-08-13 | 2013-12-11 | 柳州博泽科技有限公司 | Drinking water treatment system |
| CN103539279A (en) * | 2013-10-24 | 2014-01-29 | 哈尔滨工业大学 | Strengthening method for removing ammonia nitrogen and organic matters in rear activated carbon filter for ultrafiltration |
| CN104003578A (en) * | 2014-05-28 | 2014-08-27 | 中国环境科学研究院 | Method for treating industrial wastewater by combined two-stage ozone-biological aerated filter device |
| CN104150682A (en) * | 2014-06-27 | 2014-11-19 | 李开明 | Treatment method of vinyl chloride production wastewater by virtue of ethylene oxychlorination process |
| CN104671391A (en) * | 2015-01-27 | 2015-06-03 | 北京中科圣泰环境科技有限公司 | Ozone heterogeneous catalysis oxidization treatment device and technology for hardly degradable organic wastewater |
| CN106896793A (en) * | 2017-03-22 | 2017-06-27 | 广东卓信环境科技股份有限公司 | A kind of process structure ozonation system based on object control |
| CN108178457A (en) * | 2018-02-08 | 2018-06-19 | 深圳市深水宝安水务集团有限公司 | The middle-size and small-size water factory's short route depth-averaged model system and remodeling method of common process |
| CN108217974A (en) * | 2018-01-24 | 2018-06-29 | 上海华严检测技术有限公司 | A kind of preparation method of biological activated carbon filter |
| CN108358396A (en) * | 2018-03-23 | 2018-08-03 | 北京长阳污水处理有限责任公司 | A kind of new city sewage water treatment method |
| CN111285491A (en) * | 2018-12-07 | 2020-06-16 | 中国石油天然气股份有限公司 | Concentrated water treatment method and treatment device |
| CN111592192A (en) * | 2020-06-03 | 2020-08-28 | 盐城工学院 | Water purification system capable of simultaneously removing various smelly substances and raw water purification method |
| CN111847762A (en) * | 2020-06-08 | 2020-10-30 | 同济大学 | Treatment device for treating raw water with low organic matter content and application thereof |
| WO2022168948A1 (en) * | 2021-02-08 | 2022-08-11 | 栗田工業株式会社 | Water treatment device and method |
| CN115180740A (en) * | 2022-07-19 | 2022-10-14 | 上海城市水资源开发利用国家工程中心有限公司 | System and method for synchronously removing iron, manganese and antibiotics in pumped underground water |
| CN115353256A (en) * | 2022-08-22 | 2022-11-18 | 山东华城工程技术有限公司 | Water purification treatment process for micro-polluted surface water source water |
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| CN102633409A (en) * | 2012-04-26 | 2012-08-15 | 复旦大学 | Technological method for controlling disinfection by-product and pathogenic microorganism risk of drinking water |
| CN103435179A (en) * | 2013-08-13 | 2013-12-11 | 柳州博泽科技有限公司 | Drinking water treatment system |
| CN103435229A (en) * | 2013-08-28 | 2013-12-11 | 杭州天创环境科技股份有限公司 | Treatment methodMethod for treating to wastewater by using membrane coagulation reactor-ozone-biological activated carbon technique |
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| CN106896793A (en) * | 2017-03-22 | 2017-06-27 | 广东卓信环境科技股份有限公司 | A kind of process structure ozonation system based on object control |
| CN106896793B (en) * | 2017-03-22 | 2020-05-22 | 广东卓信环境科技股份有限公司 | Process structured ozone system based on object control |
| CN108217974A (en) * | 2018-01-24 | 2018-06-29 | 上海华严检测技术有限公司 | A kind of preparation method of biological activated carbon filter |
| CN108178457A (en) * | 2018-02-08 | 2018-06-19 | 深圳市深水宝安水务集团有限公司 | The middle-size and small-size water factory's short route depth-averaged model system and remodeling method of common process |
| CN108358396A (en) * | 2018-03-23 | 2018-08-03 | 北京长阳污水处理有限责任公司 | A kind of new city sewage water treatment method |
| CN111285491A (en) * | 2018-12-07 | 2020-06-16 | 中国石油天然气股份有限公司 | Concentrated water treatment method and treatment device |
| CN111592192A (en) * | 2020-06-03 | 2020-08-28 | 盐城工学院 | Water purification system capable of simultaneously removing various smelly substances and raw water purification method |
| CN111847762A (en) * | 2020-06-08 | 2020-10-30 | 同济大学 | Treatment device for treating raw water with low organic matter content and application thereof |
| WO2022168948A1 (en) * | 2021-02-08 | 2022-08-11 | 栗田工業株式会社 | Water treatment device and method |
| JP2022121110A (en) * | 2021-02-08 | 2022-08-19 | 栗田工業株式会社 | Water treatment device and method |
| CN115180740A (en) * | 2022-07-19 | 2022-10-14 | 上海城市水资源开发利用国家工程中心有限公司 | System and method for synchronously removing iron, manganese and antibiotics in pumped underground water |
| CN115353256A (en) * | 2022-08-22 | 2022-11-18 | 山东华城工程技术有限公司 | Water purification treatment process for micro-polluted surface water source water |
| CN115353256B (en) * | 2022-08-22 | 2024-04-16 | 山东华城工程技术有限公司 | Water purification treatment process for micro-polluted surface water source water |
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