EE201900030A - Method for the removal of nitrogen and phosphorus from wastewater using segregated activated sludge communities in a multi-stage bioreactor - Google Patents
Method for the removal of nitrogen and phosphorus from wastewater using segregated activated sludge communities in a multi-stage bioreactorInfo
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- EE201900030A EE201900030A EEP201900030A EEP201900030A EE201900030A EE 201900030 A EE201900030 A EE 201900030A EE P201900030 A EEP201900030 A EE P201900030A EE P201900030 A EEP201900030 A EE P201900030A EE 201900030 A EE201900030 A EE 201900030A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
Description
Tehnikavaldkond Technical field
Leiutis kuulub reoveepuhastuse valdkonda ja käsitleb meetodit reoveest lämmastiku ja fosfori tõhustatud ärastamiseks segregeeritud aktiivmuda koosluste abil mitmeastmelises biopuhastis, sealhulgas lämmastiku ärastamist ka madalatel temperatuuridel. The invention belongs to the field of wastewater treatment and relates to a method for enhanced removal of nitrogen and phosphorus from wastewater using segregated activated sludge communities in a multi-stage biological treatment plant, including nitrogen removal also at low temperatures.
Tehnika tase State of the art
Tuntud on leiutis (US5667688A), mis käsitleb meetodit reovee puhastamiseks kaheastmelise aktiivmudakoosluse abil, kus teise astme muda juhitakse teise astme setitist 28 esimese astme torujuhtmesse 24, mis suubub esimese astme setitisse (ei ole näidatud). Seega on tegemist osaliselt segregeeritud mudadega, teises astmes on täielikult segregeeritud muda ning esimeses astmes on mõlema astme segu, mis vähendab esimese astme aktiivsust võrrelduna sellega, kui seal oleks ka täielikult segregeeritud muda. An invention (US5667688A) is known, which relates to a method for treating wastewater using a two-stage activated sludge system, where the second-stage sludge is fed from the second-stage settler 28 into the first-stage pipeline 24, which flows into the first-stage settler (not shown). Thus, the sludge is partially segregated, the second stage contains fully segregated sludge, and the first stage contains a mixture of both stages, which reduces the activity of the first stage compared to if there were also fully segregated sludge.
Tuntud on leiutis (EE05770B1), mis käsitleb meetodit reoveest lämmastiku ja fosfori ärastamist segregeeritud aktiivmuda koosluste abil kaheastmelises biopuhastis, mille kohaselt esimeses astmes viiakse sisenev reovesi 1 kokku aktiivmudasettega 8, väljuv segu 7 suunatakse vahesetitisse 6, millest reostust sisaldav selitatud vesi 10 viiakse teises astmes läbi oksilise tsooni 11 lõppsetitisse 13, milles see separeeritakse aktiivmudasetteks 14 ja selitatud veeks 15, kusjuures aktiivmudasete 14 juhitakse tagasi oksilisse tsooni 11. Kummaski astmes kasutatakse segregeeritud aktiivmudasid ja nitraate sisaldav selitatud vesi 15 suunatakse 17 või 18 abil lõppsetitist 13 tagasi anoksilisse tsooni 4, kus viiakse läbi adenosiindifosfaadi konversioon adenosiintrifosfaadiks. Selle lahenduse puuduseks on, et anoksilise tsooni aereeritavasse ja mitteaereeritavasse tsooni (kummassegi) on paigaldatud oksüdatsioonredoks-potentsiaali (ORP) ja hapnikumõõturi andurid, mille vahendusel saadud näitude varal on võimalik otsustada, kas ja millisel määral juhtida sisenevat vett esimesest astmest mööda ja kas rakendada täiendavat aeratsiooni anoksilises tsoonis. Ekspluatatsioonis on selgunud, et nimetatud näitudest on vägagi keerukas juhinduda, sest koormused ja sellega seotud näidud muutuvad küllalt tihti ning puudub info, mil määral on taastunud esimese astme aktiivmudasettes An invention (EE05770B1) is known, which relates to a method for removing nitrogen and phosphorus from wastewater using segregated activated sludge complexes in a two-stage biological treatment plant, according to which in the first stage, the incoming wastewater 1 is combined with activated sludge sediment 8, the outgoing mixture 7 is directed to an intermediate settling tank 6, from which the clarified water 10 containing pollution is directed in the second stage through an oxic zone 11 to a final settling tank 13, in which it is separated into activated sludge sediment 14 and clarified water 15, whereby the activated sludge sediment 14 is directed back to the oxic zone 11. In both stages, segregated activated sludge is used, and the clarified water 15 containing nitrates is directed back from the final settling tank 13 to an anoxic zone 4 by means of 17 or 18, where the conversion of adenosine diphosphate to adenosine triphosphate is carried out. The disadvantage of this solution is that oxidation redox potential (ORP) and oxygen meter sensors are installed in the aerated and non-aerated zones of the anoxic zone (both), the readings of which make it possible to decide whether and to what extent to divert the incoming water past the first stage and whether to apply additional aeration in the anoxic zone. In operation, it has become clear that it is very difficult to follow these readings, because the loads and the related readings change quite often and there is no information on the extent to which the first stage activated sludge has recovered.
(tagastusmudas) ATP (adenosiintrifosfaadi) tase. (in return sludge) ATP (adenosine triphosphate) level.
Leiutisele kõige lähedasem tehnilise olemuse poolest on meetod (P201900018), mille kasutamisel aereeritakse täiendavalt esimese astme tagastusmuda 8 diferentseeritud aeratsiooniseadmes 9, mille tulemusena muutuvad tagastusmuda koosseisus esinevad võimalikud ADP-jäägid ATP-ks ning seega realiseerub ATP regenereerumine palju täielikumalt, kuid see ei pruugi garanteerida 100% ATP-saagist, sest osa fosforit võib väljuda sellest astmest vahesetiti 7 väljavoolu 14 järgi ning selle sidumine teise astme mudasse jääb määratlematuks. Samuti võib jääda üsna juhuslikuks lämmastiku ärastus, sest selitatud vee 20 retsirkulatsioonide astet ei saa tõsta lõpmatuseni ning arvutuslikult voolab osa vett puhastist läbi ilma denitrifikatsiooni läbimata. The closest to the invention in terms of technical nature is the method (P201900018), which uses additional aeration of the first-stage return sludge 8 in a differentiated aeration device 9, as a result of which any ADP residues present in the return sludge are converted into ATP and thus ATP regeneration is realized much more completely, but this may not guarantee 100% ATP yield, because some phosphorus may exit this stage according to the outflow 14 of the intermediate sedimentation tank 7 and its binding to the second-stage sludge remains undefined. Nitrogen removal may also remain quite random, because the degree of recirculation of clarified water 20 cannot be increased to infinity and, by calculation, some water flows through the purifier without undergoing denitrification.
Leiutise olemus The essence of the invention
Esitatud leiutise eesmärgiks on viia lõpule ADP konversioon ATP-ks ja jääknitraatide ärakasutamine täiendavaks denitrifikatsiooniks, kasutada kõikides astmetes BHT-materjali ehk biokeemiliselt lagunduva orgaanilise aine degradatsiooni, mille tulemusena tekib heitvesi, millest on kõrvaldatud BHT materjal, lämmastik ja fosfor. The purpose of the presented invention is to complete the conversion of ADP to ATP and the utilization of residual nitrates for additional denitrification, to utilize the degradation of BOD material, i.e. biochemically degradable organic matter, in all stages, resulting in wastewater from which BOD material, nitrogen and phosphorus have been removed.
Leiutise sisuks on meetod reoveest lämmastiku ja fosfori ärastamiseks segregeeritud aktiivmuda koosluste abil diferentseeritud aeratsiooniga mitmeastmelises biopuhastis, milles on lisaks kolmas aste reoveest lämmastiku ja fosfori ärastamiseks. Meetodi kohaselt viiakse sisenev reovesi 1 kokku esimese astme anaeroobses tsoonis 3 lõppsetitist 24 tuleva lõppsetiti aktiivmudasettega 26. Esimese astme anaeroobsest tsoonist 3 liigub segu anoksilise tsooni sissevoolu 4 kaudu esimese astme anoksilisse tsooni 5, kus toimub segunemine teisest vahesetitist 11 võetud teises vahesetitis selitatud veega 14. Saadud segu suunatakse esimesse vahesetitisse 7, kus separeeritakse esimese vahesetiti selitatud vesi 8 ja esimese vahesetiti aktiivmudasete 19. Esimese vahesetiti selitatud vesi 8 suunatakse teise astme aeroobsesse tsooni 9 ja teise astme aeroobsest tsoonist väljuv aktiivmudasegu 10 suunatakse teise vahesetitisse 11, kust teise vahesetiti selitatud vee väljavoolu 17 ja esimese vahesetiti 7 esimese vahesetiti aktiivmudasette 19 segu suunatakse kolmanda astme anoksilisse tsooni 20. Teises vahesetitis 11 separeeritakse teises vahesetitis selitatud vesi 14, 17 ja teise vahesetiti aktiivmudasete 15, kusjuures teises vahesetitis selitatud vesi 14 suunatakse tagasi esimese astme anoksilisse tsooni 5 ja teise vahesetiti aktiivmudasete 15 suunatakse The invention relates to a method for removing nitrogen and phosphorus from wastewater using segregated activated sludge communities in a multi-stage biological treatment plant with differentiated aeration, which additionally has a third stage for removing nitrogen and phosphorus from wastewater. According to the method, the incoming wastewater 1 is brought into contact with the final sedimentation activated sludge 26 from the final sedimentation 24 in the first-stage anaerobic zone 3. From the first-stage anaerobic zone 3, the mixture moves through the anoxic zone inlet 4 to the first-stage anoxic zone 5, where it mixes with the water 14 clarified in the second intermediate sedimentation taken from the second intermediate sedimentation 11. The resulting mixture is directed to the first intermediate sedimentation 7, where the clarified water 8 from the first intermediate sedimentation and the activated sludge sediment 19 from the first intermediate sedimentation are separated. The clarified water 8 from the first intermediate sedimentation is directed to the second-stage aerobic zone 9, and the activated sludge mixture 10 leaving the second-stage aerobic zone is directed to the second intermediate sedimentation 11, from where the mixture of the clarified water outflow 17 from the second intermediate sedimentation and the activated sludge sediment 19 from the first intermediate sedimentation 7 is directed to the third-stage anoxic zone 20. In the second intermediate sedimentation 11, the clarified water 14, 17 and activated sludge sediments 15 of the second intermediate settling tank, whereby the clarified water 14 in the second intermediate settling tank is returned to the first stage anoxic zone 5 and the activated sludge sediments 15 of the second intermediate settling tank are directed
tagasi teise astme aeroobsesse tsooni 9, Teise vahesetiti 11 selitatud vesi suunatakse kolmanda astme anoksilisse tsooni 20, kolmanda astme aeroobsesse tsooni 22 ja lõppsetitisse 24. back to the second stage aerobic zone 9, the clarified water from the second intermediate sedimentation tank 11 is directed to the third stage anoxic zone 20, the third stage aerobic zone 22 and the final sedimentation tank 24.
Meetodi teises teostuses suunatakse sisenev reovesi 1 esimese astme anaeroobsesse tsooni 3, millest lähtuv anoksilise tsooni sissevool 4 viiakse kokku lõppsetitist 24 väljuva lõppsetiti aktiivmudasettega 26 ja suunatakse esimese astme anoksilisse tsooni 5 ning aktiivmudasegu tsirkulatsioon 18 esimese astme anoksilise tsooni 5 väljavoolust suunatakse tagasi esimese astme anaeroobsesse tsooni 3. In the second embodiment of the method, the incoming wastewater 1 is directed to the first-stage anaerobic zone 3, from which the anoxic zone inflow 4 is combined with the final sedimentation activated sludge 26 leaving the final sedimentation tank 24 and directed to the first-stage anoxic zone 5, and the activated sludge mixture circulation 18 from the outflow of the first-stage anoxic zone 5 is directed back to the first-stage anaerobic zone 3.
Biopuhasti esimeses ja kolmandas astmes kasutatakse ühte tüüpi segregeeritud aktiivmuda, millel on ühe- ja samatüübiline päritolu ning see on seotud toitainete N ja P kõrvaldamisega. Biopuhasti teises astmes kasutatakse teist tüüpi segregeeritud aktiivmuda, mis on seotud BHT kõrvaldamise ja ammoniakaalse lämmastiku nitrifikatsiooniga. Nitraatse lämmastiku kõrvaldamine viiakse lõpule kolmanda astme anoksilises tsoonis 20. The first and third stages of the biological treatment plant use one type of segregated activated sludge, which has the same origin and is involved in the removal of nutrients N and P. The second stage of the biological treatment plant uses another type of segregated activated sludge, which is involved in the removal of BOD and the nitrification of ammoniacal nitrogen. The removal of nitrate nitrogen is completed in the anoxic zone 20 of the third stage.
Segregeeritud aktiivmudade vanused ja kontsentratsioonid ning bakteriaalsed kooslused on erinevad ja segregeeritud aktiivmudadel on erinevad funktsioonid ning neil puudub omavaheline kontakt. The ages and concentrations and bacterial communities of the segregated activated sludge are different, and the segregated activated sludge has different functions and no contact with each other.
Jooniste loetelu List of drawings
Joonisel fig 1 on kujutatud meetodi teostamise tehnoloogiline skeem, kus taastunud aktiivmuda suunatakse lõppsetitist otse anaeroobsesse tsooni. Figure 1 shows a technological scheme for implementing the method, where the recovered activated sludge is directed from the final settler directly to the anaerobic zone.
Joonisel fig 2 on kujutatud meetodi teostamise tehnoloogiline skeem, kus taastunud aktiivmuda suunatakse lõppsetitist anaeroobsesse tsooni läbi esimese anoksilise tsooni. Figure 2 shows a technological scheme for carrying out the method, where the recovered activated sludge is directed from the final sedimentation tank to the anaerobic zone through the first anoxic zone.
Leiutise teostamise näide Example of carrying out the invention
Esitatud meetod sisaldab järgmisi toiminguid: meetodi ühes teostuses seguneb sisenev reovesi 1 esimese astme anaeroobses tsoonis 3 lõppsetitist 24 tuleva lõppsetiti aktiivmudasettega 26 (otsene mudatsirkulatsioon). Reovesi 1 on soovitavalt läbinud võre ja liivapüünise (ei ole näidatud) ning olenevalt reovee iseloomust võib ta olla või mitte olla läbinud eelsetiti (ei ole näidatud). Esimese astme anaeroobset tsooni 3 ei õhustata, aktiivmuda hõljuvas olekus hoidmiseks on paigaldatud sinna segistid (ei ole näidatud). Esimese astme anaeroobsest tsoonist 3 pärinev segu liigub The presented method includes the following steps: in one embodiment of the method, the incoming wastewater 1 is mixed in the first stage anaerobic zone 3 with the final sedimentation activated sludge 26 from the final sedimentation tank 24 (direct sludge circulation). The wastewater 1 has preferably passed through a screen and a sand trap (not shown) and, depending on the nature of the wastewater, may or may not have passed through a pre-clarifier (not shown). The first stage anaerobic zone 3 is not aerated, and mixers are installed there to keep the activated sludge in a suspended state (not shown). The mixture from the first stage anaerobic zone 3 moves
anoksitise tsooni sissevoolu 4 kaudu esimese astme anoksilisse tsooni 5. Esimese astme anoksilises tsoonis 5 toimub segunemine teisest vahesetistist 11 võetud teises vahesetitis selitatud veega 14, mis sisaldab nitraate ja selles praktiliselt puudub aeroobsest tsoonist pärit aktiivmuda ja BHT aines, kuid olenevalt mitmesuguste tingimuste kombineerumisest on nimetatud komponentide väiksem sisaldus põhimõtteliselt võimalik. See vesi, olenevalt tehnoloogilisest lahendist, võetakse teisest vahesetitist 11, kas teise vahesetiti pinnalt lähtuvast selitatud veest 12 või teise vahesetiti selitatud vee väljavoolust 13. Esimese astme anoksilisest tsoonist 5 väljavoolava segu 6 koostises sisalduv sisenenud reovesi 1 on BHT osas osaliselt puhastunud ning väljavoolav segu 6, mis on ATP osas osaliselt taastunud ja nitraatidest eeldatavalt vabastatud, suunatakse esimesse vahesetitisse 7, mille aktiivmudasete 19 suunatakse kolmanda astme anoksilisse tsooni 20, mis on varustatud segistiga ja mida ei aereerita. through the inflow 4 of the anoxic zone into the first-stage anoxic zone 5. In the first-stage anoxic zone 5, mixing takes place with the water 14 taken from the second intermediate clarifier 11 and clarified in the second intermediate clarifier, which contains nitrates and is practically free of activated sludge and BOD from the aerobic zone, but depending on the combination of various conditions, a lower content of the aforementioned components is in principle possible. This water, depending on the technological solution, is taken from the second intermediate settler 11, either from the clarified water 12 coming from the surface of the second intermediate settler or from the outflow of the clarified water 13 of the second intermediate settler. The incoming wastewater 1 contained in the composition of the mixture 6 flowing out of the first-stage anoxic zone 5 is partially purified in terms of BOD, and the flowing mixture 6, which is partially recovered in terms of ATP and presumably freed from nitrates, is directed to the first intermediate settler 7, the activated sludge sediments 19 of which are directed to the third-stage anoxic zone 20, which is equipped with a mixer and is not aerated.
Esimeses vahesetitis 7 saadud esimese vahesetiti selitatud vesi 8 (sisaldab jääk BHT-d) suunatakse teise astme aeroobsesse tsooni 9 ja sealt edasi teise vahesetitisse 11, kust teise vahesetiti aktiivmuda sete 15 tsirkuleerib aktiivmuda tagastusena teise astme aeroobsesse tsooni 9 ja liigse aktiivmuda ärastamine toimub teise vahesetiti 16 kaudu. The clarified water 8 (containing residual BOD) from the first intermediate settling tank 7 is directed to the second stage aerobic zone 9 and from there to the second intermediate settling tank 11, from where the activated sludge sediment 15 from the second intermediate settling tank circulates as activated sludge return to the second stage aerobic zone 9 and the removal of excess activated sludge takes place via the second intermediate settling tank 16.
Teises vahesetitis 11 jaguneb selitatud vesi, mis sisaldab nitraate, kaheks - 14 ja 17. Neist 14 suunatakse 12 ja/või 13 abil esimese astme anoksilisse tsooni 5 ja see on mahuliselt suurem. Teise vahesetiti selitatud vee väljavool 17 on koguseliselt praktiliselt võrdne siseneva reovee 1 vooluga ja ta suundub kolmanda astme anoksilisse tsooni 20, kuhu suundub ka esimese vahesetiti 7 aktiivmudasete 19. Kolmanda astme anoksiline tsoon 20 on varustatud segistiga ja seda ei aereerita. Kolmanda astme anoksilises tsoonis 20 viiakse lõpuni hapnikku sisaldavate nitrititenitraatide degradatsioon. Kolmanda astme anoksilisest tsoonist 20 lähtuv kolmanda astme anoksilise tsooni väljavool 21 juhitakse kolmanda astme aeroobsesse tsooni 22. Selles tsoonis viiakse lõpuni ADP muundumine ATP-ks ja see aereeritav segu lahkub kolmanda astme väljavoolu 23 kaudu lõppsetitisse 24, kus eraldub aktiivmudasete, mis jaguneb lõppsetiti aktiivmudasetteks 26 ja fosforirikkaks liigse aktiivmuda ärastuseks 27 lõppsetitist. Heitvesi 25 on selitatud vesi, mis on täielikult vabastatud fosforist ja lämmastikust ning normatiivselt heljumist ja BHT-st. In the second intermediate sedimentation tank 11, the clarified water containing nitrates is divided into two - 14 and 17. Of these, 14 is directed by 12 and/or 13 to the first-stage anoxic zone 5 and is larger in volume. The outflow 17 of the clarified water from the second intermediate sedimentation tank is practically equal in quantity to the incoming wastewater 1 flow and is directed to the third-stage anoxic zone 20, where the activated sludge 19 from the first intermediate sedimentation tank 7 is also directed. The third-stage anoxic zone 20 is equipped with a mixer and is not aerated. In the third-stage anoxic zone 20, the degradation of oxygen-containing nitrites and nitrates is completed. The effluent 21 from the third-stage anoxic zone 20 is directed to the third-stage aerobic zone 22. In this zone, the conversion of ADP to ATP is completed and this aerated mixture leaves the third-stage effluent 23 to the final settling tank 24, where the activated sludge is separated, which is divided into the final settling tank activated sludge 26 and the phosphorus-rich excess activated sludge removal 27 from the final settling tank. The effluent 25 is clarified water, which is completely freed from phosphorus and nitrogen and, to a standard extent, from suspended solids and BOD.
Meetodi teises teostuses suunatakse sisenev reovesi 1 esimese astme In the second embodiment of the method, the incoming wastewater 1 is directed to the first stage
anaeroobsesse tsooni 3, millest lähtuv anoksilise tsooni sissevool 4 viiakse kokku lõppsetitist 24 väljuva lõppsetiti aktiivmudasettega 26 ja suunatakse esimese astme anoksilisse tsooni 5 ning aktiivmudasegu tsirkulatsioon 18 esimese astme anoksilise tsooni 5 väljavoolust suunatakse tagasi esimese astme anaeroobsesse tsooni 3. to the anaerobic zone 3, from which the anoxic zone inflow 4 is combined with the final sedimentation activated sludge 26 leaving the final sedimentation tank 24 and is directed to the first-stage anoxic zone 5, and the activated sludge mixture circulation 18 from the outflow of the first-stage anoxic zone 5 is directed back to the first-stage anaerobic zone 3.
Lõppsetiti aktiivmudasete 26 suunatakse normaalsete olude korral (meetodi esimeses teostuses) tagasi esimese astme anaeroobsesse tsooni 3 (otsene aktiivmuda tagastus, joonis fig 1) või kui anaeroobne protsess saab seeläbi häiritud (meetodi teises teostuses), siis esimese astme anoksilise tsooni 5 kaudu aktiivmudasegu tsirkulatsiooniga 18 (vahendatud aktiivmuda-tagastus) esimese astme anaeroobsesse tsooni 3 (joonis fig 2). The activated sludge sediment 26 of the final septic tank is directed under normal conditions (in the first embodiment of the method) back to the first-stage anaerobic zone 3 (direct activated sludge return, Figure 1) or, if the anaerobic process is thereby disturbed (in the second embodiment of the method), then through the first-stage anoxic zone 5 with the activated sludge mixture circulation 18 (mediated activated sludge return) to the first-stage anaerobic zone 3 (Figure 2).
Veel parema tulemuse saavutamiseks võib kaskaadi lülitada tagasipesuga liivafiltri (ei oie näidatud). For even better results, the cascade can be connected to a backwash sand filter (not shown).
Leiutisekohast meetodit realiseeriv seade on kolmeastmeline biopuhasti, kus esimese astme moodustavad esimese astme anaeroobne tsoon 3, esimese astme anoksiline tsoon 5 ja esimene vahesetiti 7. Teiseks astmeks on teise astme aeroobne tsoon 9 ja sellele järgnev teine vahesetiti 11. Kolmanda astme moodustavad kolmanda astme anoksiline tsoon 20, kolmanda astme aeroobne tsoon 22 ja lõppsetiti 24. The device implementing the method according to the invention is a three-stage biological treatment plant, where the first stage consists of the first stage anaerobic zone 3, the first stage anoxic zone 5 and the first intermediate settler 7. The second stage consists of the second stage aerobic zone 9 and the second intermediate settler 11 following it. The third stage consists of the third stage anoxic zone 20, the third stage aerobic zone 22 and the final settler 24.
Viitenumbrite loetelu List of reference numbers
1 reovesi 1 wastewater
2 osaline möödavool 2-way bypass
3 esimese astme anaeroobne tsoon 3 first stage anaerobic zone
4 anoksilise tsooni sissevool 4 anoxic zone inflow
5 esimese astme anoksiline tsoon 5 first-stage anoxic zone
6 väljavoolav segu 6 flowing mixture
7 esimene vahesetiti 7 first intermediate set
8 esimese vahesetiti selitatud vesi 8 first intermediate sediment clarified water
9 teise astme aeroobne tsoon 9 second level aerobic zone
10 teise astme aeroobsest tsoonist väljuv aktiivmudasegu 10 activated sludge mixture leaving the second stage aerobic zone
11 teine vahesetiti 11 second interval set
12 teise vahesetiti pinnalt lähtuv seiitatud vesi 12 second intermediate sediment surface water
13 teise vahesetiti väljavoolust lähtuv seiitatud vesi 14 teises vahesetitis seiitatud vesi 13 treated water from the outflow of the second intermediate settler 14 treated water in the second intermediate settler
15 teise vahesetiti aktiivmudasete 15 second intermediate activated sludge sediments
16 liigse aktiivmuda ärastus teisest vahesetitist 16 removal of excess activated sludge from the second intermediate settling tank
17 teise vahesetiti seiitatud vee väljavool 17 second intermediate sedimentation basin water outflow
18 aktiivmudasegu tsirkulatsioon 18 activated sludge circulation
19 esimese vahesetiti aktiivmudasete 19 activated sludge deposits of the first intermediate set
20 kolmanda astme anoksiline tsoon 20 tertiary anoxic zone
21 kolmanda astme anoksilise tsooni väljavool 22 kolmanda astme aeroobne tsoon 21 tertiary anoxic zone outflow 22 tertiary aerobic zone
23 kolmanda astme väljavool 23 tertiary outflow
24 lõppsetiti 24 final sets
25 heitvesi 25 wastewater
26 lõppsetiti aktiivmudasete 26 final activated sludge sediments
27 liigse aktiivmuda ärastus lõppsetitist 27 Removal of excess activated sludge from the final settler
Claims (8)
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| EEP201900030A EE05854B1 (en) | 2019-12-19 | 2019-12-19 | A method for removing nitrogen and phosphorus from wastewater using segregated activated sludge communities in a multi-stage biorefinery |
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| EEP201900030A EE05854B1 (en) | 2019-12-19 | 2019-12-19 | A method for removing nitrogen and phosphorus from wastewater using segregated activated sludge communities in a multi-stage biorefinery |
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| EE201900030A true EE201900030A (en) | 2021-07-15 |
| EE05854B1 EE05854B1 (en) | 2023-05-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6406629B1 (en) * | 1999-07-20 | 2002-06-18 | Zenon Environmental Inc. | Biological process for removing phosphorous involving a membrane filter |
| US20050087480A1 (en) * | 2002-02-28 | 2005-04-28 | Park Jong-Bok | Wastewater treatment apparatus and method for removing nitrogen and phosphorus |
| EP2469532A2 (en) * | 2005-07-29 | 2012-06-27 | Kabushiki Kaisha Toshiba | Optical head and information recording/reproducing apparatus |
| EP2496531A1 (en) * | 2010-09-20 | 2012-09-12 | American Water Works Company, Inc. | Simultaneous anoxic biological phosphorus and nitrogen removal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2469653A1 (en) * | 2010-12-22 | 2012-06-27 | Cobham Cts Ltd | Electromagnetic wave polarizer screen |
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2019
- 2019-12-19 EE EEP201900030A patent/EE05854B1/en unknown
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6406629B1 (en) * | 1999-07-20 | 2002-06-18 | Zenon Environmental Inc. | Biological process for removing phosphorous involving a membrane filter |
| US20050087480A1 (en) * | 2002-02-28 | 2005-04-28 | Park Jong-Bok | Wastewater treatment apparatus and method for removing nitrogen and phosphorus |
| EP2469532A2 (en) * | 2005-07-29 | 2012-06-27 | Kabushiki Kaisha Toshiba | Optical head and information recording/reproducing apparatus |
| EP2496531A1 (en) * | 2010-09-20 | 2012-09-12 | American Water Works Company, Inc. | Simultaneous anoxic biological phosphorus and nitrogen removal |
| EP2496530A1 (en) * | 2010-09-20 | 2012-09-12 | American Water Works Company, Inc. | Optimized nutrient removal from wastewater |
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| EE05854B1 (en) | 2023-05-15 |
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