CN101074135A - Nitrating method and device and waste water processor - Google Patents
Nitrating method and device and waste water processor Download PDFInfo
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- CN101074135A CN101074135A CNA2007101029365A CN200710102936A CN101074135A CN 101074135 A CN101074135 A CN 101074135A CN A2007101029365 A CNA2007101029365 A CN A2007101029365A CN 200710102936 A CN200710102936 A CN 200710102936A CN 101074135 A CN101074135 A CN 101074135A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
A kind of waste water processor, the characteristics is that the device has the parts as follows: multiple segments nitrating groove to configure the groove for nitrating treating nitrogen liquid containing ammonia as more than two grooves n segments; denitrification groove setting on the posterior segment of the mentioned multi segments nitrating groove and implementing denitrification treatment to the effluent after nitrating treatment; further exposure groove to implement further exposure to the effluent after denitrification treatment; solid-liquid separation groove to separate the effluent after further exposure treatment; feeding unit to feed the sludge from the solid liquid separation groove and/or treating water to the n segment and/or n-1 segment of the multi-segment nitrating groove. Thus, to shorten the beginning time of the nitrating groove and to begin rapidly, also to restrain the phenomena that the nitrating speed of the AL bacterium immobilization carrier toboggans when keeping constant operation, and to keep the nitrating speed higher stably.
Description
The application's application number that to be the applicant propose on April 24th, 2003 is 03110694.3, and denomination of invention is divided an application for the application for a patent for invention of " nitrifying method, device and wastewater treatment equipment ".
Technical field
The present invention relates to nitrifying method, device and wastewater treatment equipment, especially relate to the nitrifying method, device and the wastewater treatment equipment that are used for the ammonium-nitrogen waste water of high density is carried out fast processing with immobilized microorganism.
Background technology
The ammonium-nitrogen that contains in the waste water is because as the reduction that causes the oxygen that exists with dissolved state in the public waters at the place of emitting or cause one of polytrophic material in the closed water area, so the method for effectively removing becomes a present problem.As the method for the ammonium-nitrogen in the biological processes waste water, adopt improved active sludge circulation method usually, be utilize by nitrifier by ammonia to nitrated of nitric acid should and by denitrifier by the method for nitric acid to the denitrification reaction of nitrogen.This method is made of become reconciled two grooves of nitrifying groove of oxygen condition of the denitrifying tank of anaerobic state, in denitrifying tank, carry out organic decomposition and denitrogenation processing in the waste water, in nitrifying groove, the ammonium-nitrogen in the waste water is carried out nitration treatment and become nitric acid by nitrifier by denitrifier.In addition, the nitrification liquid in nitrifying groove after the nitration treatment is by circulating to denitrifying tank, and the nitrogen component in the waste water is removed to atmosphere as nitrogen discharge.This improved active sludge circulation method be to improve nitrification efficiency, the immobilization of digestion bacterium is inquired into, practicability the immobilization nitrifier is put into the method for nitrifying groove.And then, also inquired into the method for nitrifier being put into nitrifying groove.
The waste water that this improved active sludge circulation method is suitable for, being mainly ammonium-nitrogen concentration is the low water of ammonium-nitrogen concentration of 20～60mg/l degree, nitration reaction is carried out smoothly under the ammonium-nitrogen concentration of this degree, and the ammonium-nitrogen concentration of emitting in the water is to emit below the following several mg/l of benchmark.But, the a large amount of examples that produce of the ammonium-nitrogen waste water of high density (400mg/L～5000mg/L degree), as development place, inorganic synthetic workshop, generating etc. situation under, the ammonium-nitrogen concentration dilution that makes the former water of waste water to the highest can not surpass 200mg/l after, carry out biological processing.The wastewater flow rate that the result occurs needing to handle increases sharply, on a large scale the problem of wastewater treatment equipment and so on.
Under this background, the present inventor, in patent documentation 1, the AH bacterium as nitrifier that discovery is cultivated in the ammoniumsulphate soln of the above concentration of concentration 5000mg/L and detected is brought into play high nitrated speed more than ammonium-nitrogen concentration 400mg/L; Nitrifier AH bacterium of cultivating in the ammoniumsulphate soln of the above concentration of concentration 5000mg/L and detecting and the AL bacterium as nitrifier of cultivating in the low-concentration sulfuric acid ammonium solution of concentration 100mg/L and detecting are brought into play high nitrated speed with the AH bacterium and the AL bacterium of the breeding of mixed phase state in ammonium-nitrogen concentration 150～400mg/L scope; And the AL bacterium as nitrifier of cultivating in the low-concentration sulfuric acid ammonium solution of concentration 100mg/L and detecting is brought into play high nitrated speed below ammonium-nitrogen concentration 200mg/L.
In addition, in the method for the ammonium-nitrogen waste water of biological processes high density, proposed to be provided with the characteristic of utilizing described 3 kinds of nitrifiers, in the 1st section the 1st nitrifying groove, AH bacteria immobilization carrier is contacted with the ammonia wastewater, in the 2nd section the 2nd nitrifying groove, AH bacterium and AL bacteria immobilization carrier are contacted with the ammonia wastewater, in the 3rd section the 3rd nitrifying groove, make the method for the multistage nitrifying groove that AL bacteria immobilization carrier contacts with the ammonia wastewater.
Patent documentation 1: No. 3252887 communique of patent.
But in described multistage nitrifying groove, when the nitrifying groove of find to exist the AL bacterium the 2nd section and the 3rd section began, the phenomenon that nitrated speed does not improve was created in when beginning problem for a long time thus.In addition, even when carrying out constant work with big in stable condition of nitrated speed, sometimes the phenomenon that nitrated speed sharply descends also can occur, be created in the problem of the water quality deterioration of the treating water that denitrogenation processing obtains in the denitrifying tank of back segment setting of multistage nitrifying groove thus.
Summary of the invention
The present invention finishes in view of this class problem, when purpose is to provide the beginning that can carry out rapidly at short notice in the nitrifying groove that the AL bacterium exists, the rapid reduction of nitrated speed and make nitrated speed temperature keep nitrifying method, device and the wastewater treatment equipment of bigger state when suppressing constant work.
When the multistage nitrifying groove is set, in the nitrifying groove of the preferential rear section side of breeding of AL bacterium, as mentioned above, though have the phenomenon that nitrated speed does not improve when beginning, but the contriver has inquired into this reason, found that owing to follow the intracellular nitrite nitrogen (NO of AL bacterium
2-N) ammonium-nitrogen (the NH of concentration and outside
4-N) the equilibrated matrix between the concentration moves (active transport).That is, the balance between the intracellular nitrite nitrogen concentration of AL bacterium and the ammonium-nitrogen concentration of outside is in case near roughly 1: 1, cause that then the activity of AL bacterium just can not raise again.So, find by the balanced remote between the ammonium-nitrogen concentration that makes nitrite nitrogen concentration in the nitrifying groove and outside then can to make the nitrated speed of AL bacterium return to good state from 1: 1.
As making 1: 1 method of described balance deviation, discovery is in the back segment of the nitrifying groove that the AL bacterium exists, after denitrogenation processing, the liquid after aeration again handled carries out solid-liquid separation and isolating mud and/or treating water is back to the AL bacterium that to exist in the ground nitrifying groove be effective.This reason, consideration is because the denitrogenation processing of the nitrogen removal performance in when beginning when insufficient causes that nitrous acid is too much remaining, and then make nitrated by this liquid being carried out again the aeration processing, compare with ammonia concentration and to obtain high mud of nitrous acid concentration or treating water, by this mud and/or treating water are back to nitrifying groove, thereby make 1: 1 cause of described balance deviation.At this moment, carry out again aeration at the back segment of nitrifying groove with the aeration rate of Duoing and handle, also have effect even only carry out nitration reaction than the aeration rate in the nitrifying groove.But, find to be back to nitrifying groove excessively if compare high mud of nitrous acid concentration and/or treating water with ammonia concentration, nitrous acid concentration in the nitrifying groove with respect to the ratio of ammonium-nitrogen concentration (be designated hereinafter simply as " ratio of nitrous acid/ammonia) in case become excessive since surpass the AL bacterium nitrous acid patience boundary and nitrated speed sharply descends.
The contriver is according to above-mentioned opinion, shorten the time opening and begin rapidly for the nitrated speed that makes the nitrifying groove that the AL bacterium exists improves, inquired into the ratio of the nitrous acid/ammonia in the suitable nitrifying groove by test, found that the ratio of nitrous acid/ammonia must be in 2～10 scope, more preferably in 3～8 scope.
In addition, the contriver finds the ratio of the nitrous acid/ammonia in this nitrifying groove, is not subjected to when to begin restriction, even when nitrifying groove carries out constant work with big nitrated velocity-stabilization ground, the ratio of nitrous acid/ammonia is if be lower than 2 or above 10 o'clock, nitrated speed sharply descended.So, when constant work, the ratio of the nitrous acid/ammonia in the nitrifying groove is dropped in the above-mentioned scope by adjustment, can keep the very big state of nitrated speed all the time.
In addition, the contriver finds that it is also effective to add zeolite in the nitrifying groove that the AL bacterium exists as making 1: 1 method of described balance deviation.This reason, consideration are because zeolite has good ammonia adsorptivity, by adding zeolite and adsorb ammonia, 1: 1 cause of described balance deviation in the nitrifying groove that exists the AL bacterium.At this moment, the amount that also must adjust the zeolite that adds makes the ratio of the nitrous acid/ammonia nitrifying groove in above 10 so that do not make zeolite adsorption ammonia.
The present invention finishes according to relevant opinion.
One of the present invention, it is characterized in that, for reaching described purpose, make to contain ammonium-nitrogen liquid and in nitrifying groove, in good oxygen atmosphere, contact and carry out nitration treatment, simultaneously the ratio of the nitrite nitrogen concentration/ammonium-nitrogen concentration in this nitrifying groove is controlled in 2～10 the scope in the low-concentration sulfuric acid ammonium solution of the about 100mg/L of concentration, cultivating AL bacteria immobilization carrier after the AL bacterium as nitrifier that detected in 4～8 weeks preferentially breeds.
Can shorten the time opening in the nitrifying groove thus and can begin rapidly, and can suppress constant operation the time the nitrated speed of AL bacteria immobilization carrier rapid decline phenomenon and make nitrated velocity-stabilization keep bigger state.
So, the ammonia wastewater to high density do not dilute and handle to the section nitrifying groove in make ammonia contain nitrogen solution to contact with AL bacteria immobilization carrier and carry out in the nitrifying groove of nitration treatment can further handling the ammonia wastewater of high density effectively if use one of the present invention's nitrifying method.
The present invention's two, it is characterized in that, to achieve the object of the present invention, make contain cultivate in ammonium-nitrogen liquid and the high-concentration sulfuric acid ammonium solution more than concentration 5000mg/L detected in 4～8 weeks as the AH bacterium of nitrifier and in the low-concentration sulfuric acid ammonium solution of the about 100mg/L of concentration, cultivate detected in 4～8 weeks as the AL bacterium of nitrifier AH bacterium and the AL bacteria immobilization carrier after with the state breeding of mixed phase, nitration treatment is carried out in contact in the inherent good oxygen atmosphere of nitrifying groove, simultaneously, if the ratio of the bacterium number of bacterium number/AL bacterium of AH bacterium is lower than at 1 o'clock in described AH bacterium and the AL bacteria immobilization carrier, the ratio of the concentration of the nitrite nitrogen in the described nitrifying groove/ammonium-nitrogen concentration is controlled in 2～10 the scope.
When in nitrifying groove, beginning, phenomenon that nitrated speed does not raise or the phenomenon that nitrated sometimes speed sharply descends when constant operation, be not limited to contain the nitration treatment of ammonium-nitrogen liquid and AL bacteria immobilization carrier, even in the nitration treatment that contains ammonium-nitrogen liquid and AH bacterium and AL bacteria immobilization carrier, also can produce.But at this moment, if the ratio of the bacterium number of bacterium number/AL bacterium of AH bacterium is lower than at 1 o'clock in AH bacterium and the AL bacteria immobilization carrier, promptly the AL bacterium is more than the AH bacterium, produces the situation that the AL bacterium becomes the speed limit of nitrated speed sometimes.
So, the present invention two in, the ratio of the bacterium number of bacterium number/AL bacterium of AH bacterium is lower than at 1 o'clock in AH bacterium and AL bacteria immobilization carrier, owing to the scope that the ratio of the nitrous acid/ammonia in the nitrifying groove can be controlled at 2～10, so can shorten the time opening in the nitrifying groove and begin rapidly, and can suppress constant operation the time the nitrated speed of AL bacteria immobilization carrier rapid decline phenomenon and make nitrated velocity-stabilization keep bigger state.
So, the ammonia wastewater to high density do not dilute and handle manyly make in to the section nitrifying groove ammonia contain nitrogen solution to contact with AH bacterium and AL bacteria immobilization carrier and carry out in the nitrifying groove of nitration treatment can further handling the ammonia wastewater of high density effectively if use one of the present invention's nitrifying method.
The present invention's three is characterized in that, one of the present invention or two in, make the ratio of the nitrite nitrogen concentration/ammonium-nitrogen concentration in the nitrifying groove be controlled at 3～8.
The present invention's three is that the ratio with the nitrous acid/ammonia in the nitrifying groove is limited in 3～8 scopes, can further keep bigger nitrated speed.
The present invention's four, it is characterized in that, to achieve the object of the present invention, contain ammonium-nitrogen liquid and in good oxygen atmosphere, contact and carry out in the nitrated device of nitration treatment making, be provided with the described nitrifying groove that ammonium-nitrogen liquid flows into that contains with nitrifier, as in described nitrifying groove with described to contain the fixation support that ammonium-nitrogen liquid contacts be to cultivate the AL bacteria immobilization carrier after the AL bacterium as nitrifier that detected in 4～8 hours preferentially breeds in the low ammoniumsulphate soln of the about 100mg/L of concentration, make the aeration unit that has been located in the described nitrifying groove in the oxygen atmosphere, detect the nitrite nitrogen concentration/ammonium-nitrogen concentration in the described nitrifying groove ratio detect the unit, detect the control unit that the unitary result of detecting controls the ratio of the concentration of the nitrite nitrogen in the described nitrifying groove/ammonium-nitrogen concentration according to described.
The present invention's four is constituent apparatus that the nitrifying method of one of invention is specialized.
Five of the present invention's invention, it is characterized in that, to achieve the object of the present invention, contain ammonium-nitrogen liquid and in good oxygen atmosphere, contact and carry out in the nitrated device of nitration treatment making, be provided with the described nitrifying groove that ammonium-nitrogen liquid flows into that contains with nitrifier, as be filled in the described nitrifying groove and with described contain fixation support that ammonium-nitrogen liquid contacts be to cultivate in the high-concentration sulfuric acid ammonium solution more than concentration 5000mg/L detected in 4～8 weeks as the AH bacterium of nitrifier and in the low-concentration sulfuric acid ammonium solution of the about 100mg/L of concentration, cultivate AH bacterium and AL bacteria immobilization carrier after the AL bacterium as nitrifier that detected in 4～8 weeks breeds with the state of mixed phase, make the aeration unit that has been made as oxygen atmosphere in the described nitrifying groove, detect the nitrite nitrogen concentration/ammonium-nitrogen concentration in the described nitrifying groove ratio detect the unit, if the ratio of the bacterium number of bacterium number/AL bacterium of AH bacterium is lower than at 1 o'clock and detects the unitary result of detecting and the ratio of the concentration of the nitrite nitrogen in the described nitrifying groove/ammonium-nitrogen concentration is controlled at control unit in 2～10 the scope according to described in AH bacterium and the AL bacteria immobilization carrier.
The present invention's five is constituent apparatus that the present invention's two nitrifying method is specialized.In addition, whether the ratio of the bacterium number of bacterium number/AL bacterium of AH bacterium is lower than 1 in AH bacterium and the AL bacteria immobilization carrier, just can learn by checking the thalline in AH bacterium and the AL bacteria immobilization carrier.
The present invention's six, it is characterized in that, the present invention four or five in, described control unit is that the mud that will produce by the solid-liquid separation after aeration is handled again at the back segment of described nitrifying groove and/or treating water are returned to the foldback unit in the described nitrifying groove and/or add the adding device of zeolite in described nitrifying groove.
Owing to the back segment at described nitrifying groove can be returned in the described nitrifying groove by mud and/or the treating water that the solid-liquid separation after aeration is handled again produces, so nitration reaction is carried out and the high mud and/or the treating water of ratio of nitrous acid/ammonia is returned in the nitrifying groove.As a result, can shorten the time opening in the nitrifying groove and can begin rapidly, and can suppress constant operation the time the nitrated speed of AL bacteria immobilization carrier rapid decline phenomenon and make nitrated velocity-stabilization keep bigger state.At this moment, the mud of foldback and/or treating water be used for that nitrifying groove begins raise and train during, preferably contain nitrous acid 100～200mg/L, contain ammonia 50mg/L.That is, handle and carry out nitratedly, can obtain the relation of such nitrous acid/ammonia by carry out again aeration with the inadequate state of when beginning denitrogenation.
In addition, also can obtain same effect by in nitrifying groove, adding zeolite.
The present invention's seven, it is characterized in that, for reaching described purpose, the multistage nitrifying groove that nitration treatment is contained the above n hop count of groove configuration arranged side by side 2 grooves of ammonium-nitrogen liquid is set, the effluent liquid of the back segment that is arranged at described multistage nitrifying groove after to nitration treatment in the described multistage nitrifying groove carries out the denitrifying tank of denitrogenation processing, effluent liquid after the denitrogenation processing in the described denitrifying tank is carried out the aerator tank again that aeration is handled again, effluent liquid after aeration is handled again in the described aerator tank is again carried out the solid-liquid separation tank of solid-liquid separation, mud after the described solid-liquid separation tank solid-liquid separation and/or treating water are returned to the foldback unit of n section in the described multistage nitrifying groove and/or n-1 section.
The present invention's seven constitutes as assembling nitrated device of the present invention in the multistage nitrifying groove and from containing the waste water plant that ammonium-nitrogen liquid removes denitrification.Thus, can shorten the time opening in the nitrifying groove and can begin rapidly, and can suppress constant operation the time the nitrated speed of AL bacteria immobilization carrier rapid decline phenomenon and make nitrated velocity-stabilization keep bigger state.At this moment, be more residual nitrous acid in the mud that makes foldback and/or the treating water, can add methyl alcohol addition in the denitrifying tank with 0.5～1.0 times concentration of nitrous acid concentration.
Description of drawings
Fig. 1 is the explanatory view of the characteristic of expression AH bacterium, AH bacterium and AL bacterium, AL bacterium.
Fig. 2 is the graph of a relation of the nitrated speed of expression ratio of nitrous acid/ammonia and AL bacterium.
Fig. 3 is the pie graph of the nitrated device of the present invention.
Fig. 4 is in wastewater treatment equipment of the present invention, is suitable for the pie graph of nitrifying method of the present invention in nitrifying groove being set up in parallel 3 sections the 3rd nitrifying groove of multistage nitrifying groove.
Fig. 5 is in wastewater treatment equipment of the present invention, is suitable for the pie graph of nitrifying method of the present invention in nitrifying groove being set up in parallel 3 sections the 2nd nitrifying groove of multistage nitrifying groove.
Fig. 6 is in wastewater treatment equipment of the present invention, is suitable for the pie graph of nitrifying method of the present invention in nitrifying groove being set up in parallel 3 sections the 2nd nitrifying groove of multistage nitrifying groove and the 2nd nitrifying groove.
Fig. 7 is in wastewater treatment equipment of the present invention, is suitable for the pie graph of nitrifying method of the present invention in nitrifying groove being set up in parallel 4 sections the 3rd nitrifying groove of multistage nitrifying groove.
Fig. 8 is in wastewater treatment equipment of the present invention, is suitable for the pie graph of nitrifying method of the present invention in nitrifying groove being set up in parallel 5 sections the 4th nitrifying groove of multistage nitrifying groove and the 5th nitrifying groove.
Fig. 9 is in wastewater treatment equipment of the present invention, is suitable for the pie graph of nitrifying method of the present invention in nitrifying groove being set up in parallel 6 sections the 6th nitrifying groove of multistage nitrifying groove.
Among the figure: 10 nitrated devices, 12 inflow pipes, 14 nitrifying grooves, the fixation support of 16AL bacterium or AH bacterium and AL bacterium, 18 gas blowers, 20 aeration tubes, 22 outlet pipes, 24 solid-liquid separation tanks, 26 foldback mud pipe arrangements, 28 controllers, 30 foldback sludge pumps, 32 containers, 34 add pipe arrangement, 36 valves, 38 nitrous acid transmitters, 40 ammoniacal sensors, 50,60,70,80,90,100 wastewater treatment equipments, 52 denitrifying tanks, 17,54 aerator tanks again, 56 solid-liquid separation tanks.
Embodiment
Below with reference to the accompanying drawings the preferred implementation of nitrifying method of the present invention, device and wastewater treatment equipment is elaborated.
Before explanation the present invention, for describing as AH bacterium, AH bacterium and AL bacterium and the AL bacterium of understanding prerequisite of the present invention.
The inventor finds, nitrifier roughly exists in the ammonium-nitrogen atmospheric condition of high density and brings into play highly active nitrifier down and the highly active nitrifier of performance under the ammonium-nitrogen atmospheric condition of lower concentration, for distinguishing this two classes nitrifier, to in the high-concentration sulfuric acid ammonium solution more than the concentration 5000mg/l, cultivate the nitrifier that detected in 4～8 weeks and be made as the AH bacterium, and in the ammoniumsulphate soln of the lower concentration of the about 100mg/l of concentration, cultivate the nitrifier that detected in 4～8 weeks and be made as the AL bacterium.
The characteristic of these AH bacterium or AL bacterium as shown in Figure 1, the preferential breeding in the zone of AH bacterium more than ammonium-nitrogen concentration 400mg/l finds that bacterium digital display work increases, nitrated speed also significantly increases.The preferential breeding in the zone of AL bacterium below ammonium-nitrogen concentration 200mg/l finds that bacterium digital display work increases, and nitrated speed is presented near the para-curve that peak value is arranged the 100mg/l.In addition, become the AH bacterium and the AL bacterium of the mixed phase breeding of AH bacterium and AL bacterium in the zone of 150～400mg/l, nitrated speed produces two kinds of bacterium and mixes the product effect that exists.
So, by constructing the multistage nitrifying groove that effectively utilizes AH bacterium and AL bacterium characteristic, can be effectively and handle the ammonium-nitrogen waste liquid of high density apace, simultaneously owing to can control the nitration reaction of nitrite type, so the organic addition of the necessity in the denitrifying tank is reduced.
The inventor is in the research about the multistage nitrifying groove that utilizes AH bacterium, AH bacterium and AL bacterium, AL bacterium, and the reason of phenomenon that nitrated speed does not increase during the beginning of the nitrifying groove of the back segment that exists as AL bacterium in the multistage nitrifying groove or the phenomenon that nitrated sometimes speed sharply descends when constant operation is found relation shown in Figure 2.
The longitudinal axis of Fig. 2 is the nitrated speed (mg-N/hL-carrier) of AL bacterium, and transverse axis is a nitrite nitrogen concentration and the ratio (ratio of nitrous acid/ammonia) of ammonium-nitrogen concentration in the nitrifying groove of filling AL bacteria immobilization carrier.
As shown in Figure 2, if the ratio of nitrous acid/ammonia is increased, the nitrated speed of AL bacterium sharply descends, when the ratio of nitrous acid/ammonia is roughly 1: 1 o'clock nitrated speed and is reduced to about 40 (mg-N/hL-carriers), as the reason of this phenomenon, consideration is because the ratio of nitrous acid/ammonia is the cause that the active transport of matrix is hindered under 1: 1 the equilibrium state.This is to contain that ammonium-nitrogen liquid contacts with AL bacteria immobilization carrier and observed phenomenon when carrying out the beginning of nitrifying groove of nitration treatment making, the water quality condition little by the nitrite nitrogen concentration at nitrated initial stage carries out nitration treatment, and little by little the nitrite nitrogen concentration in the nitrifying groove raises.
In the past, in case nitrite nitrogen concentration increases the reason that the nitrated speed of AL bacterium sharply descends, consideration is owing to the weak cause of the nitrous acid patience of ALA bacterium, but as shown in Figure 2, if the ratio that makes nitrous acid/ammonia when roughly further increasing at 1: 1, the nitrated speed of AL bacterium rises.The ratio of nitrous acid/ammonia is 2 o'clock, and nitrated speed returns to 100 (mg-N/hL-carriers), and it is that 200 (mg-N/hL-carriers) change to maximum that the ratio of nitrous acid/ammonia surpasses 3 o'clock nitrated speed.And, be that the nitrated speed of about 8 beginnings reduces once more from the ratio of nitrous acid/ammonia, the ratio of nitrous acid/ammonia is that about 10 o'clock nitrated speed is reduced to about 100 (mg-N/hL-carriers), also descends afterwards.Consider that this is because if the ratio of nitrite nitrogen concentration and ammonium-nitrogen concentration in the nitrifying groove becomes excessive, so owing to surpass the nitrated speed of boundary of the nitrous acid patience of AL bacterium and begin to descend.
So, in the time opening of the nitrifying groove of shorten filling AL bacteria immobilization carrier, the ratio of the nitrous acid/ammonia in the nitrifying groove being controlled at 2～10 scope, 3～8 the scope of preferably being controlled at is very important.In addition, even when stably carrying out constant operation with big nitrated speed state, the ratio of the nitrous acid/ammonia in the nitrifying groove is controlled at 2～10 scope, 3～8 the scope of preferably being controlled at is very important.
In addition, not only the nitrogenous nitrification liquid of ammonia is contacted with AL bacteria immobilization carrier and carrying out in the nitrifying groove of nitration treatment, the nitrogenous nitrification liquid of ammonia is being contacted with AH bacterium and AL bacteria immobilization carrier and carrying out in the nitrifying groove of nitration treatment the ratio of nitrous acid/ammonia of generation Fig. 2 too and the relation of nitrated speed.But at this moment, the ratio of the bacterium number of bacterium number/AL bacterium of the A H bacterium in AH bacterium and AL bacteria immobilization carrier is lower than at 1: 1 o'clock and produces described relation as can be known.
Nitrifying method of the present invention, finish according to described opinion, be make contain the AL bacteria immobilization carrier of cultivating the preferential breeding of nitrifier AL bacterium that detected in 4～8 weeks in ammonium-nitrogen liquid and the low-concentration sulfuric acid ammonium solution at the about 100mg/L of concentration in nitrifying groove, under good oxygen atmosphere, make contact and carry out nitration treatment in, the ratio of the nitrous acid/ammonia in this nitrifying groove is controlled at 2～10 scope, preferably is controlled at the method for 3～8 scope.
And then be make contain cultivate the nitrifier AH bacterium that detected in 4～8 weeks in ammonium-nitrogen liquid and the high-concentration sulfuric acid ammonium solution more than concentration 5000mg/L and in the low-concentration sulfuric acid ammonium solution of the about 100mg/L of concentration, cultivate the nitrifier AL bacterium that detected in 4～8 weeks with the AH bacterium of mixed phase state breeding and AL bacteria immobilization carrier in nitrifying groove, under good oxygen atmosphere, make contact and carry out nitration treatment in, the ratio of the bacterium number of bacterium number/AL bacterium of the AH bacterium in described AH bacterium and AL bacteria immobilization carrier is lower than at 1: 1 o'clock, the ratio of the nitrous acid/ammonia in this nitrifying groove is controlled at 2～10 scope, preferably is controlled at the method for 3～8 scope.
The situation of nitrifying method of the present invention, AL bacteria immobilization carrier or AH bacterium and AL bacteria immobilization carrier, can be to separate AH bacterium or AL bacterium and the immobilized what is called carrier by the preparation of separation and Culture nitrifier immobilization method from active sludge, also can be any carrier that the what is called from integrated cultivation AH bacterium or AL bacterium prepares by integrated cultivation nitrifier immobilization method.
Fig. 3 is the pie graph that is suitable for the nitrated device of nitrifying method of the present invention.
In addition, above nitrifying groove 14, the container 32 that stores zeolite is set, adds pipe arrangement 34 from bottom to nitrifying groove 14 configurations of container 32.And controller 28 is arranged at the valve 36 that adds on the pipe arrangement 34 by switching and adds zeolite in nitrifying groove 14.Adding the zeolite purpose in nitrifying groove 14 is the absorption that removes deammoniation, also can so long as can remove other the material of material of deammoniation absorption.In addition, as except that the method for removing the ammonia in the nitrifying groove 14 of absorption, the PH desorption method is arranged, the PH of nitrifying groove 14 interior liquid roughly is adjusted into 10, by will the ammonia in the liquid being distributed in the atmosphere by the air capacity aeration of aeration tube 20 aerations 2 times to good oxygen atmosphere hollow tolerance.
In nitrifying groove 14, the nitrous acid transmitter 38 that detects nitrite nitrogen concentration is set, the ammoniacal sensor 40 that detects ammonium-nitrogen concentration is set simultaneously.For example Blang's magnifying glass can be used as nitrous acid transmitter 38,, for example ion electrode can be used as ammoniacal sensor 40.By the result that nitrous acid transmitter 38 and ammoniacal sensor 40 detect, by the ratio of comparer 42 calculating nitrous acid/ammonia, the result who calculates is input in the controller 28.In addition, controller 28 adds the valve 36 of pipe arrangement 34 or the foldback sludge pump 30 of mud foldback pipe arrangement 26 according to the ratio control of nitrous acid/ammonia of importing, and the ratio that makes the nitrous acid/ammonia in the nitrifying groove 14 is in 2～10 scope.Promptly, when the beginning of nitrifying groove 14 or during constant operation, when the ratio of nitrous acid/ammonia is mobile near 1 direction, controller 28, to be returned to nitrifying groove 14 by high mud and/or the treating water of nitrous acid concentration that solid-liquid separation tank 24 produces, and/or in nitrifying groove 14, add zeolite.Thus, can shorten the time opening in the nitrifying groove and begin rapidly, and can suppress constant operation the time the nitrated speed of AL bacteria immobilization carrier rapid decline phenomenon and make nitrated velocity-stabilization keep bigger state.At this moment, be remaining too much nitrous acid in the mud of foldback and/or treating water, can add the addition of the methyl alcohol in the denitrifying tank 15 with 0.5～1.0 times concentration of nitrous acid concentration.
But, the high mud of nitrous acid concentration will be compared and/or treating water is returned in the nitrifying groove 14 excessively with ammonia concentration, or adsorb ammonia in the nitrifying groove 14 excessively by zeolite, in case the ratio of the nitrous acid/ammonia in the nitrifying groove 14 surpasses 10, just surpassed the boundary of the nitrous acid patience of AL bacterium.So, the amount of the mud that the constituting of controller 28 can be controlled foldback in nitrifying groove 14 aptly and/or the amount for the treatment of water or the zeolite that in nitrifying groove 14, adds.
Fig. 4～Fig. 9 is expression, be suitable for nitrifying method of the present invention and device in the nitrifying groove that AL bacterium in the multistage nitrifying groove or AL bacterium AH bacterium exist, be used for handling effectively and apace the pie graph of the liquid waste treating apparatus that contains ammonium-nitrogen liquid of the above high density of ammonia concentration 400mg/L.In addition, in the multistage nitrifying groove of Fig. 4～Fig. 9, the groove number of the groove number of the nitrifying groove of AL bacterium AH bacteria immobilization carrier and the nitrifying groove of AL bacteria immobilization carrier is an example wherein, changes according to the ammonium-nitrogen concentration that contains ammonium-nitrogen liquid that flows into the multistage treatment trough.
The wastewater treatment equipment 50 of Fig. 4 is provided with denitrifying tank 52, aerator tank 54 and solid-liquid separation tank 56 again in the back segment of the multistage nitrifying groove that constitutes by 3 sections.The 3rd section the 3rd nitrifying groove 14C that the 2nd section the 2nd nitrifying groove 14B that the multistage nitrifying groove is contacted with AH bacterium AH bacteria immobilization carrier by the 1st section the 1st nitrifying groove 14A that the ammonia wastewater is contacted with AH bacteria immobilization carrier, the effluent liquid that makes the 1st nitrifying groove 14A, the effluent liquid that makes the 2nd nitrifying groove 14B contact with AL bacteria immobilization carrier constitutes.In addition, on the 3rd nitrifying groove 14C, connect foldback mud pipe arrangement 26, allow to be suitable for nitrifying method of the present invention, simultaneously, connect the interpolation pipe arrangement 34 of zeolite from solid-liquid separation tank 56.In addition, in Fig. 4, omit with the foldback sludge pump 30 of the nitrous acid transmitter 38 of nitrated device 10 explanation of Fig. 3, ammoniacal sensor 40, comparer 42, controller 28, the valve 36 that adds pipe arrangement 34, mud foldback pipe arrangement 26, Fig. 5 to Fig. 9 too.In addition, aerator tank 54 is the grooves that carry out once more nitration treatment again, makes aeration rate more than nitrifying groove aeration rate doubly, carries out once more in the nitration treatment ammonia being loose the ammonia in the ratio of minimizing nitrous acid/ammonia after denitrogenation processing.
The wastewater treatment equipment 60 of Fig. 5 is gone up and has been removed the interpolation pipe arrangement 34 of zeolite except that the foldback mud pipe arrangement from solid-liquid separation tank 56 being connected the 2nd nitrifying groove 14B, and remaining is identical with Fig. 4.
The wastewater treatment equipment 70 of Fig. 6 connects the foldback mud delivery tube 26 from solid-liquid separation tank 56, allows to be dispensed to the 2nd nitrifying groove 14B and the 3rd nitrifying groove 14C, and the interpolation pipe arrangement 34 of zeolite is not set simultaneously, and is in addition, identical with Fig. 4.
The wastewater treatment equipment 80 of Fig. 7 is provided with denitrifying tank 52, aerator tank 54 and solid-liquid separation tank 56 once more on the back segment of the multistage nitrifying groove that constitutes by 4 sections.The multistage nitrifying groove, the 4th section the 4th nitrifying groove 14D that the 2nd section the 2nd nitrifying groove 14B that is contacted with AH bacterium AH bacteria immobilization carrier by the 1st section the 1st nitrifying groove 14A that the ammonia wastewater is contacted with AH bacteria immobilization carrier, the effluent liquid that makes the 1st nitrifying groove 14A, the 3rd section the 3rd nitrifying groove 14C that the effluent liquid that makes the 2nd nitrifying groove 14B contacts with AL bacteria immobilization carrier and the effluent liquid that makes the 3rd nitrifying groove 14C contact with AL bacteria immobilization carrier constitutes.And connect foldback mud pipe arrangement 26, make in the 3rd nitrifying groove 14C and can be suitable for nitrifying method of the present invention, the interpolation pipe 34 of zeolite still is not set from solid-liquid separation tank 56.
The wastewater treatment equipment 90 of Fig. 8 is provided with denitrifying tank 52, aerator tank 54 and solid-liquid separation tank 56 once more on the back segment of the multistage nitrifying groove that constitutes by 5 sections.The multistage nitrifying groove, the 5th section the 5th nitrifying groove 14E that the 2nd section the 2nd nitrifying groove 14B that is contacted with AH bacterium AH bacteria immobilization carrier by the 1st section the 1st nitrifying groove 14A that the ammonia wastewater is contacted with AH bacteria immobilization carrier, the effluent liquid that makes the 1st nitrifying groove 14A, the 3rd section the 3rd nitrifying groove 14C that the effluent liquid that makes the 2nd nitrifying groove 14B contacts with AH bacterium AH bacteria immobilization carrier, the 4th section the 4th nitrifying groove 14D that the effluent liquid that makes the 3rd nitrifying groove 14C contacts with AH bacterium AH bacteria immobilization carrier and the effluent liquid that makes the 4th nitrifying groove 14D contact with AL bacteria immobilization carrier constitutes.And connect foldback mud pipe arrangement 26, make in the 4th nitrifying groove 14D and the 5th nitrifying groove 14E and can be suitable for nitrifying method of the present invention, the interpolation pipe 34 of zeolite still is not set from solid-liquid separation tank 56.In addition, AH bacterium and AL bacterium mixed phase breeding in the 2nd nitrifying groove 14B, the 3rd nitrifying groove 14C and the 4th nitrifying groove 14E, the ratio of AH bacterium is higher to reach ratio in the nitrifying groove (the 2nd nitrifying groove) of leading portion side.
The wastewater treatment equipment 100 of Fig. 9 is provided with denitrifying tank 52, aerator tank 54 and solid-liquid separation tank 56 once more on the back segment of the multistage nitrifying groove that constitutes by 6 sections.The multistage nitrifying groove is by the 1st section the 1st nitrifying groove 14A that the ammonia wastewater is contacted with AH bacteria immobilization carrier, the 2nd section the 2nd nitrifying groove 14B that the effluent liquid of the 1st nitrifying groove 14A is contacted with AH bacterium AH bacteria immobilization carrier, the 3rd section the 3rd nitrifying groove 14C that the effluent liquid of the 2nd nitrifying groove 14B is contacted with AH bacterium AH bacteria immobilization carrier, the 4th section the 4th nitrifying groove 14D that the effluent liquid of the 3rd nitrifying groove 14C is contacted with AH bacterium AH bacteria immobilization carrier, the 5th section the 5th nitrifying groove 14E that the effluent liquid of the 4th nitrifying groove 14D is contacted with AL bacteria immobilization carrier, and the 6th section the 6th nitrifying groove 14F that the effluent liquid that makes the 5th nitrifying groove 14E contacts with AL bacteria immobilization carrier constitutes.And connect foldback mud pipe arrangement 26, make in the 6th nitrifying groove 14F and can be suitable for nitrifying method of the present invention, the interpolation pipe 34 of zeolite still is not set from solid-liquid separation tank 56.
Fig. 4～shown in Figure 9 as described, on the nitrifying groove of the rear section side that the AL of multistage nitrifying groove bacterium exists, construct the wastewater treatment equipment that is suitable for nitrifying method of the present invention, foldback denitrogenation processing and carry out again mud and/or the treating water that the solid-liquid separation after aeration is handled produces and then in the back segment of multistage nitrifying groove 14 in n section in the multistage nitrifying groove and/or the n-1 section, and/or in existing the ground nitrifying groove, the AL of multistage nitrifying groove 14 bacterium adds zeolite, thus when the time opening of the nitrifying groove that can shorten the existence of AL bacterium also begins rapidly, even when carrying out constant operation, also can suppress the phenomenon that sometimes nitrated speed sharply descends so that big nitrated speed state is stable.Thus, stable effectively the ammonium-nitrogen liquid that contains that contains high strength ammonia is carried out nitration treatment owing to can remain, so, can from wastewater treatment equipment, discharge the treating water of good water quality.
[embodiment]
(embodiment 1)
Shown in workshop waste water A composed as follows.
NH
4-N concentration: 400～650mg/L
BOD concentration: 20～40mg/L
COD concentration: 80～100mg/L
TN concentration: 450～700mg/L
NO
2-N concentration: below the 10mg/L
NO
3-N concentration: below the 10mg/L
The capacity of each treatment trough is as follows, and wastewater treatment capacity is 30m
3/ h.
The 1st nitrifying groove: 100L
The 2nd nitrifying groove: 200L
The 3rd nitrifying groove: 300L
Denitrifying tank: 300L
Aerator tank: 100L again
Solid-liquid separation tank: 200L
And when the beginning of liquid waste treating apparatus, in the mud after the 3rd nitrifying groove foldback separates by solid-liquid separation tank, add zeolite by adding pipe arrangement.In addition, by being arranged at nitrous acid transmitter and the ammoniacal sensor on the 3rd nitrifying groove, monitor the variation of the ratio of nitrous acid/ammonia.In addition, in denitrifying tank, add 0.5 times quantity of methyl alcohol of the amounts of nitrous acid that generates.In order to make remaining more nitrous acid in the treating water in denitrifying tank, make the methyl alcohol addition lower than usually.
Its result, the ratio of the nitrous acid/ammonia in the time of can be with the beginning in the 3rd nitrifying groove is controlled at 3～6 scope, the NO in the 3rd nitrifying groove
2-N concentration is at 150～210mg/L, NH
4-N concentration changes in 40～50mg/L scope.Thus, the active beginning of the carrier in the 3rd nitrifying groove becomes early, and nitration reaction is carried out smoothly, reaches 120 (mg-N/hL-carriers) in the nitrated speed that begins the 3rd nitrifying groove of operation after 1 month.
On the other hand, if the mud that produces in the foldback solid-liquid separation tank not, and do not add zeolite during beginning in the 3rd nitrifying groove, the ratio of nitrous acid/ammonia is near 1: 1, the NO in the 3rd nitrifying groove
2-N concentration is at 150～210mg/L, NH
4-N concentration changes in the high scope of 210～350mg/L.Nitrated speed at 3rd nitrifying groove of beginning operation after 1 month is reduced to 35 (mg-N/hL-carriers).Thus, confirmed the nitrifying groove foldback mud that exists to the AL bacterium by the solid-liquid separation tank in when beginning and/effect for the treatment of water and the effect of adding zeolite.
(embodiment 2)
NH
4-N concentration: 1000～1500mg/L
BOD concentration: 20～40mg/L
COD concentration: 18～60mg/L
TN concentration: 1010～1510mg/L
NO
2-N concentration: below the 10mg/L
NO
3-N concentration: below the 10mg/L
The capacity of each treatment trough is as follows, and wastewater treatment capacity is 30m
3/ h.
The 1st nitrifying groove: 100L
The 2nd nitrifying groove: 200L
The 3rd nitrifying groove: 300L
Denitrifying tank: 300L
Aerator tank: 100L again
Solid-liquid separation tank: 200L
And after 2 weeks of wastewater treatment equipment operation,, use 2 weeks of wastewater treatment equipment operation of Fig. 6 at last with 2 weeks of wastewater treatment equipment operation of Fig. 5 with Fig. 4.In addition, the wastewater treatment equipment of Fig. 4, Fig. 5, Fig. 6 all with 200% foldback rate will be by the isolating mud of solid-liquid separation tank with the foldback sludge pipe to the 3rd nitrifying groove foldback.When Fig. 6, will be divided into half amount to the 2nd nitrifying groove and the 3rd nitrifying groove foldback by the isolating mud of solid-liquid separation tank.The ratio of the bacterium number of bacterium number/AL bacterium of the AH bacterium in the nitrifying groove of the 2nd nitrifying groove of Fig. 6 is lower than 1.In addition, in denitrifying tank, add 0.5 times the quantity of methyl alcohol that generates amounts of nitrous acid.In order to make remaining more nitrous acid in the treating water in denitrifying tank, make the methyl alcohol addition lower than usually.In addition, in implementing nitrifying groove of the present invention, monitor by the variation of nitrous acid transmitter and ammoniacal sensor to the ratio of nitrous acid/ammonia.
Its result, arbitrary wastewater treatment equipment can both be controlled at the ratio of the nitrous acid/ammonia in the 3rd nitrifying groove 3～10 scope, NO among Fig. 4, Fig. 5, Fig. 6
2-N concentration is at 290～390mg/L, NH
4-N concentration changes in the low scope of 30～50mg/L.Thus, nitration reaction can be successfully carried out, and good treating water can be from waste water plant, discharged.
On the other hand, under the situation of arbitrary wastewater treatment equipment, in case stop the foldback of mud, the ratio of nitrous acid/ammonia becomes 1～2 in Fig. 4, Fig. 5, Fig. 6, the NO in the nitrifying groove of back segment
2-N concentration is at 540～840mg/L, NH
4-N concentration changes in the high scope of 460～660mg/L.Confirmed thus so long as the nitrifying groove that the AL bacterium exists all is effective to any nitrifying groove foldback mud.
(embodiment 3)
NH
4-N concentration: 1350～1600mg/L
BOD concentration: 15～40mg/L
COD concentration: 80～100mg/L
TN concentration: 1360～1610mg/L
NO
2-N concentration: below the 10mg/L
NO
3-N concentration: below the 10mg/L
The capacity of each treatment trough is as follows, and wastewater treatment capacity is 5L/h.
The 1st nitrifying groove: 100L
The 2nd nitrifying groove: 200L
The 3rd nitrifying groove: 300L
Denitrifying tank: 300L
Aerator tank: 100L again
Solid-liquid separation tank: 200L
And after 2 weeks of wastewater treatment equipment operation,, use 2 weeks of wastewater treatment equipment operation of Fig. 9 at last with 2 weeks of wastewater treatment equipment operation of Fig. 8 with Fig. 7.In addition, in Fig. 7, the isolating mud of solid-liquid separation tank is returned in the 3rd nitrifying groove, in Fig. 8 to the 4th nitrifying groove and each foldback of the 5th nitrifying groove half, in Fig. 9 to the 6th nitrifying groove foldback.The foldback rate is 200%.In addition, in denitrifying tank, add 0.9 times the quantity of methyl alcohol that generates amounts of nitrous acid.In addition, in implementing nitrifying groove of the present invention, monitor by the variation of nitrous acid transmitter and ammoniacal sensor to the ratio of nitrous acid/ammonia.
Its result, arbitrary wastewater treatment equipment can both be controlled at the ratio of the nitrous acid/ammonia in the nitrifying groove of enforcement nitrifying method of the present invention 4～10 scope among Fig. 7, Fig. 8, Fig. 9.Thus owing to can keep bigger nitrated speed, the NO in the nitrifying groove of back segment
2-N concentration is at 290～400mg/L, NH
4-N concentration changes in the low scope of 30～50mg/L.The result can make nitrifying method carry out smoothly, can discharge good treating water from wastewater treatment equipment.
On the other hand, in a single day arbitrary wastewater treatment equipment stops the foldback of mud among Fig. 7, Fig. 8, Fig. 9, and the ratio of the nitrous acid/ammonia in the nitrifying groove becomes 1～2, the NO in the nitrifying groove of back segment
2-N concentration is at 820～1100mg/L, NH
4-N concentration changes in the high scope of 480～560mg/L.Confirmed the foldback effect of mud thus.
As described above, according to nitrifying method of the present invention, device and wastewater treatment equipment, the interior time opening of nitrifying groove that can shorten the existence of AL bacterium also can begin rapidly, and the phenomenon that nitrated speed sharply descends in the time of can suppressing constant operation also makes nitrated velocity-stabilization keep bigger state, nitration reaction is carried out smoothly, thereby can discharge good treating water from wastewater treatment equipment.
Claims (2)
1. wastewater treatment equipment, it is characterized in that, be provided with: the multistage nitrifying groove that nitration treatment is contained the above n hop count of groove configuration arranged side by side 2 grooves of ammonium-nitrogen liquid, be arranged at the back segment of described multistage nitrifying groove and the effluent liquid after the nitration treatment in the described multistage nitrifying groove carried out the denitrifying tank of denitrogenation processing, effluent liquid after the denitrogenation processing in the described denitrifying tank is carried out the aerator tank again that aeration is handled again, effluent liquid after aeration is handled again in the described aerator tank is again carried out the solid-liquid separation tank of solid-liquid separation, mud after the solid-liquid separation in the described solid-liquid separation tank and/or treating water are returned to the foldback unit of n section in the described multistage nitrifying groove and/or n-1 section.
2. wastewater treatment equipment according to claim 1 is characterized in that, the adding device that adds zeolite is set on described n section and/or n-1 section.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP200399496 | 2003-04-02 | ||
| JP2003099496A JP4336947B2 (en) | 2003-04-02 | 2003-04-02 | Waste water treatment equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031106943A Division CN100475713C (en) | 2003-04-02 | 2003-04-24 | Nitrating method and device and waste water processor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101074135A true CN101074135A (en) | 2007-11-21 |
| CN100554183C CN100554183C (en) | 2009-10-28 |
Family
ID=33463937
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101029365A Expired - Fee Related CN100554183C (en) | 2003-04-02 | 2003-04-24 | Wastewater treatment equipment |
| CNB031106943A Expired - Fee Related CN100475713C (en) | 2003-04-02 | 2003-04-24 | Nitrating method and device and waste water processor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031106943A Expired - Fee Related CN100475713C (en) | 2003-04-02 | 2003-04-24 | Nitrating method and device and waste water processor |
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| Country | Link |
|---|---|
| JP (1) | JP4336947B2 (en) |
| CN (2) | CN100554183C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104271515A (en) * | 2012-03-09 | 2015-01-07 | 美得华水务株式会社 | Wastewater treatment device, wastewater treatment method, wastewater treatment system, control device, control method, and program |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4910266B2 (en) * | 2004-03-01 | 2012-04-04 | 栗田工業株式会社 | Nitrification method and treatment method of ammonia-containing nitrogen water |
| JP2013039538A (en) * | 2011-08-18 | 2013-02-28 | Hitachi Plant Technologies Ltd | Wastewater treatment apparatus |
| JP6046373B2 (en) * | 2012-04-24 | 2016-12-14 | パナソニック株式会社 | Nitrogen-containing wastewater treatment equipment |
| WO2014017429A1 (en) * | 2012-07-26 | 2014-01-30 | 学校法人 東洋大学 | Method and device for treating ammonia nitrogen-containing water at low temperature |
| CN104098174A (en) * | 2014-07-31 | 2014-10-15 | 李天源 | Production method for active carriers used in biological sewage denitrification |
| JP6445855B2 (en) * | 2014-12-08 | 2018-12-26 | 株式会社日立製作所 | Nitrogen treatment method and nitrogen treatment apparatus |
| JP6651298B2 (en) * | 2015-04-14 | 2020-02-19 | 学校法人 東洋大学 | Wastewater treatment method and wastewater treatment device for wastewater containing high salt concentration |
| JP2018118209A (en) * | 2017-01-25 | 2018-08-02 | 株式会社日立製作所 | Nitrogen treatment method |
| KR102373080B1 (en) * | 2019-12-19 | 2022-03-14 | 주식회사 포스코 | Method for promoting nitrification of wastewater |
-
2003
- 2003-04-02 JP JP2003099496A patent/JP4336947B2/en not_active Expired - Lifetime
- 2003-04-24 CN CNB2007101029365A patent/CN100554183C/en not_active Expired - Fee Related
- 2003-04-24 CN CNB031106943A patent/CN100475713C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104271515A (en) * | 2012-03-09 | 2015-01-07 | 美得华水务株式会社 | Wastewater treatment device, wastewater treatment method, wastewater treatment system, control device, control method, and program |
| CN104271515B (en) * | 2012-03-09 | 2016-08-17 | 美得华水务株式会社 | Wastewater treatment equipment, method of wastewater treatment, Waste Water Treatment, control device and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004305816A (en) | 2004-11-04 |
| JP4336947B2 (en) | 2009-09-30 |
| CN100475713C (en) | 2009-04-08 |
| CN1533989A (en) | 2004-10-06 |
| CN100554183C (en) | 2009-10-28 |
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