EP1240108A1 - Procede et installation de traitement d'eaux residuaires comprenant un traitement additionnel des boues par ozonation - Google Patents
Procede et installation de traitement d'eaux residuaires comprenant un traitement additionnel des boues par ozonationInfo
- Publication number
- EP1240108A1 EP1240108A1 EP00971503A EP00971503A EP1240108A1 EP 1240108 A1 EP1240108 A1 EP 1240108A1 EP 00971503 A EP00971503 A EP 00971503A EP 00971503 A EP00971503 A EP 00971503A EP 1240108 A1 EP1240108 A1 EP 1240108A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sludge
- ozone
- treatment
- reactor
- biological
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000010802 sludge Substances 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000006385 ozonation reaction Methods 0.000 title claims description 17
- 238000009434 installation Methods 0.000 title claims description 16
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 39
- 238000000926 separation method Methods 0.000 claims abstract description 13
- 239000008187 granular material Substances 0.000 claims abstract description 8
- 230000015556 catabolic process Effects 0.000 claims abstract description 5
- 238000006731 degradation reaction Methods 0.000 claims abstract description 5
- 230000008719 thickening Effects 0.000 claims abstract description 5
- 238000010908 decantation Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 230000008569 process Effects 0.000 claims description 18
- 239000002351 wastewater Substances 0.000 claims description 9
- 239000005416 organic matter Substances 0.000 claims description 8
- 230000000593 degrading effect Effects 0.000 claims description 7
- 244000144992 flock Species 0.000 claims description 5
- 244000005700 microbiome Species 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 1
- 238000000746 purification Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 11
- 238000005273 aeration Methods 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 239000012159 carrier gas Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 241000233866 Fungi Species 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 2
- 230000037358 bacterial metabolism Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005352 clarification Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000010842 industrial wastewater Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000010899 nucleation Methods 0.000 description 2
- 239000011368 organic material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012163 sequencing technique Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009302 aerobic granulation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000006911 enzymatic reaction Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000135 prohibitive effect Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 230000002829 reductive effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005063 solubilization Methods 0.000 description 1
- 230000007928 solubilization Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1205—Particular type of activated sludge processes
- C02F3/1221—Particular type of activated sludge processes comprising treatment of the recirculated sludge
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
-
- 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
Definitions
- the subject of the present invention is a process and an installation for purifying waste water, in particular urban or industrial waste water, comprising an additional treatment of the sludge by ozonation in order to reduce the quantities of sludge produced by a biological treatment and d '' increase the flows passing through the sludge clarification system.
- the present invention also proposes to reduce, on the one hand, the cost of treating excess sludge and on the other hand, the investment costs of the water-sludge separation system.
- EP-A-0 645 347 which describes a process in which an ozone treatment of the sludge is carried out, coupled with a pretreatment with Acid pH of the sludge, in order to reduce the production of excess sludge.
- a variant of this known treatment is described in FR-A-2 766 813 which describes a process in which the ozonization treatment is coupled to a mechanical treatment of the sludge.
- the process for obtaining these granules consists in the addition of “nuclei” or even of micro-supports as well as in high ascending speeds of the water to be treated applied in the anaerobic reactor.
- An example of application of this method is given in the publication “Granular Sludge Formation in the Anaerobic Expanded Micro-Carrier Process” published in “Water Science Technology” vol 23, pp 1167-1177.
- the present invention has set itself the objective of solving the problem consisting in directly obtaining flocs having the appearance of granules or granular sludges, allowing an improvement in the decantability of the sludges, and this, in an aerobic environment without specific seeding.
- the present invention relates to a process for purifying waste water loaded with organic matter, which comprises a step of biological treatment of water during which the organic matter contained in the water is degraded by microorganisms by producing sludge and a water-sludge separation step, the sludge leaving the separation step being recycled in the biological treatment step, this process being characterized in that it further comprises a step of degrading the sludge , resulting either from the biological treatment stage, or from the separation stage during which the sludge is brought into contact with an ozone gas under conditions making it possible to obtain a flock consisting of granules whose average size is greater than 200 microns, the rate of volatile matter is between 50 and 65%, the thickening factor of these granular sludges, after settling during penda nt 30 minutes always being greater than 4, the conditions for obtaining said granular sludge consisting in:
- the ozonation step can be carried out continuously or discontinuously.
- the action of ozone induces a stress of the bacterial metabolism characterized by the solubilization of organic and mineral matter and a substantial modification of the bacterial metabolism.
- the enzymatic reaction to stress is called maintenance energy.
- One of the visible causes is the regrouping of the floc in a new granular structure, that is to say a physical self-protection of the bacterial fauna against stress.
- the bacteria will use the substrate from the treated water no longer to reproduce but to resist the effects of stress by increasing the maintenance energy.
- the present invention relates to a water treatment installation implementing the method defined above.
- This installation comprises at least one biological treatment reactor receiving the raw water loaded with organic matter which is degraded by microorganisms by producing sludge and a solid / liquid separator which receives the waste water coming from the biological reactor and which ensures the separation sludge water, a recycling loop making it possible to return to the biological reactor at least a portion of the sludges thus separated.
- This installation is characterized in that it comprises a means of degrading the sludge collecting part of the sludge coming either from the biological reactor or from the separator and subjecting this sludge to an ozonation treatment, the sludge thus treated then being recycled in the reactor organic.
- Figure 1 is a schematic view of an exemplary embodiment of a wastewater treatment installation implementing the method of the invention
- FIGS. 2 and 3 schematically represent two embodiments of the means for degrading the sludge
- FIGS. 4 and 5 respectively illustrate the appearance of the flock obtained according to the process which is the subject of the invention and according to the prior art
- Figure 6 illustrates the monitoring of sludge production as a function of time, for each treatment channel.
- FIG. 1 schematically represents a wastewater treatment plant
- At least one biological treatment reactor 2 such as in particular an aeration tank, a reactor with fixed cultures or with free cultures, an anaerobic digester or the like, in which the organic materials contained in the raw water are degraded by microorganisms by producing sludge;
- a solid-liquid separation means such as for example a clarifier 3 which receives the waste water from the biological reactor 2 and which separates the water from the sludge; a treated water outlet 4 which collects the water at the outlet of the clarifier
- This recycling loop 5 provides a flow rate representing 50 to 300% of the normal flow rate of waste water to be treated by the treatment plant.
- the installation further comprises a sludge degradation loop 6 which collects part of the sludge from the biological reactor 2 and which returns this sludge to the reactor 2 after passing through a sludge ozonization system designated in its together by the reference 7 in FIG. 1.
- the sludges which are degraded by ozonation in the system 7 can come either from the biological treatment of the water to be treated (as illustrated by FIG. 1), or from the device for sludge separation 3.
- FIG. 2 represents an exemplary embodiment of an ozonation system 7 according to the invention.
- this system comprises a supply 20 of sludge from the biological reactor 2, a feed or recovery pump 8 of this sludge supplying a dynamic mixer 9 driven by a motor 10 and which is provided with a pipe supply 11 of an ozone gas consisting of ozone mixed with a carrier gas which may be air or oxygen or a mixture of these two gases, the mixing between the sludge and the ozone gas being carried out in this dynamic mixer 9.
- the system 7 also comprises a reaction chamber 12 in which the ozone gas mixed with the sludge is exhausted, the contact time between the latter and the ozone gas being between 10 seconds and 90 minutes, preferably between 5 and 30 minutes.
- the treated sludge is removed at 13 and recycled to the biological reactor 2.
- a system 14 is provided for removing residual gas, for example to a unit for destroying residual ozone.
- the carrier gas consists of oxygen
- the biological reactor is an aeration tank
- Figure 3 there is shown another embodiment of the system 7 ensuring the degradation, by ozonation, of the sludge.
- this system comprises a reactor 17 for bringing ozone into contact with the sludge to be treated, the latter being brought in from the biological reactor 2 via a feed pump 15 or recovery, this reactor 17 being provided with an ozone gas inlet 16 composed of ozone mixed with a carrier gas which may be air or oxygen or a mixture of the two gases.
- a carrier gas which may be air or oxygen or a mixture of the two gases.
- the contact time between the sludge and the ozone gas bubbles is between 10 seconds and 90 minutes, preferably between 5 and 30 minutes.
- the sludge is evacuated at 18 in order to be brought back to the biological reactor 2.
- the reactor 17 comprises, at its upper part, a means 19 for evacuating the residual gas, for example towards a unit for destroying the residual ozone.
- oxygen as a carrier gas
- the biological reactor 2 is an aeration tank, it will be possible, after destruction or not of the residual ozone, to return the oxygen in the aeration tank.
- FIG. 5 shows the appearance of the flock obtained.
- the treatment conditions, the characteristics of the treated raw water and the sludge concentration in the aeration tank were the same as those of the reference example, but the sludge was subjected to an additional treatment, by ozonation in accordance with the present invention.
- the ozonation treatment according to the invention was carried out so as to treat 800 g. of MES per day or once the mass of the aeration tank per day, with an ozone dose of 5 g. per kg of MES treated.
- the ozonation was carried out in accordance with the exemplary implementation of the invention illustrated in FIG. 2. After one month of operation, the production of sludge averaged 5 g MES / day. and the sludge index amounted to 30 ml / g., which allows settling rates of the order of 4 m / h.
- the characteristics of the treated water were as follows: CODt: 50 mg / l.
- the appearance of the flock is shown in Figure 4. It is in the form of small granules whose average size is greater than 200 microns, whose volatile content is 60%, and whose thickening factor after 30 minutes of settling, amounts to 6.
- the monitoring of the production of sludge, as a function of time, is represented in FIG. 6, for each treatment path.
- the sludge produced can be twelve times less important than that from a conventional process.
- a proportion of sludge reduced by 40 to 95% has been observed compared to a conventional treatment without the addition of chemical reagents;
- sludge index characterizing their decantability, less than 50 ml / g or even less than or equal to 30 ml / g to compare with the sludge index obtained in the case of conventional installations (100 to 150 ml / g .);
- the partial oxidation of the sludge by ozone leads to the production of assimilable organic materials, usable, in particular, as nutrients in the denitrification stage.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Microbiology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Treatment Of Sludge (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Activated Sludge Processes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9915427A FR2801880B1 (fr) | 1999-12-07 | 1999-12-07 | Procede et installation de traitement d'eaux residuaires comprenant un traitement additionnel des boues par ozonation |
FR9915427 | 1999-12-07 | ||
PCT/FR2000/002973 WO2001042150A1 (fr) | 1999-12-07 | 2000-10-25 | Procede et installation de traitement d'eaux residuaires comprenant un traitement additionnel des boues par ozonation |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1240108A1 true EP1240108A1 (fr) | 2002-09-18 |
Family
ID=9552982
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00971503A Withdrawn EP1240108A1 (fr) | 1999-12-07 | 2000-10-25 | Procede et installation de traitement d'eaux residuaires comprenant un traitement additionnel des boues par ozonation |
Country Status (10)
Country | Link |
---|---|
US (1) | US6780319B1 (fr) |
EP (1) | EP1240108A1 (fr) |
JP (1) | JP2004501739A (fr) |
AU (1) | AU1034901A (fr) |
BR (1) | BR0016220A (fr) |
CA (1) | CA2394359C (fr) |
DE (1) | DE1240108T1 (fr) |
ES (1) | ES2180462T1 (fr) |
FR (1) | FR2801880B1 (fr) |
WO (1) | WO2001042150A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004088415A2 (fr) * | 2003-03-28 | 2004-10-14 | Advanced Technology Materials Inc. | Liberation de reactifs par modulation photometrique |
US7063097B2 (en) | 2003-03-28 | 2006-06-20 | Advanced Technology Materials, Inc. | In-situ gas blending and dilution system for delivery of dilute gas at a predetermined concentration |
US7790427B1 (en) | 2005-09-20 | 2010-09-07 | Battelle Memorial Institute | Method of treating biocells |
US8222223B2 (en) * | 2005-09-20 | 2012-07-17 | Battelle Memorial Institute | Method of treating biocells |
US7547394B2 (en) * | 2005-12-21 | 2009-06-16 | Zenon Technology Partnership | Wastewater treatment with aerobic granules |
US7459076B2 (en) * | 2005-12-22 | 2008-12-02 | Zenon Technology Partnership | Flow-through aerobic granulator |
US7699980B2 (en) * | 2007-08-24 | 2010-04-20 | Praxair Technology, Inc. | System for activated sludge wastewater treatment with high dissolved oxygen levels |
DE102007060914B4 (de) * | 2007-12-14 | 2023-03-16 | Air Liquide Deutschland Gmbh | Verfahren zur Behandlung von Wasser in einer Aufbereitungsanlage |
CN103304097B (zh) * | 2013-06-18 | 2014-09-17 | 中国海洋石油总公司 | 一种臭氧絮凝生物联合处理含酚煤气废水的方法 |
JP6507389B2 (ja) * | 2014-12-25 | 2019-05-08 | アサヒ飲料株式会社 | 活性汚泥廃水処理方法及び活性汚泥廃水処理設備 |
FR3047002B1 (fr) | 2016-01-21 | 2020-01-31 | Degremont | Procede et dispositif de traitement d'eaux residuaires par oxydation |
CN110902974A (zh) * | 2019-12-19 | 2020-03-24 | 北京清核朝华科技有限公司 | 污水深度净化提升水质处理系统及方法 |
CN112094013B (zh) * | 2020-09-14 | 2022-05-24 | 江苏泓润生物质能科技有限公司 | 一种市政污泥协同处理方法 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2973761B2 (ja) * | 1993-01-11 | 1999-11-08 | 栗田工業株式会社 | 有機性排液の好気性処理方法 |
JP3648751B2 (ja) * | 1993-10-22 | 2005-05-18 | 栗田工業株式会社 | 有機性排液の好気性生物処理方法 |
JP3521535B2 (ja) * | 1995-04-11 | 2004-04-19 | 栗田工業株式会社 | 有機性排液の好気性生物処理装置 |
JP3383505B2 (ja) * | 1996-02-01 | 2003-03-04 | 株式会社荏原製作所 | 有機性汚水の活性汚泥処理方法および装置 |
JPH09206786A (ja) * | 1996-02-05 | 1997-08-12 | Kurita Water Ind Ltd | 嫌気性処理方法および装置 |
JP3831949B2 (ja) * | 1996-07-19 | 2006-10-11 | 栗田工業株式会社 | 有機性排液の生物処理方法および装置 |
JP3763439B2 (ja) * | 1997-05-30 | 2006-04-05 | 三菱電機株式会社 | 廃水のオゾン処理方法およびオゾン処理装置 |
DE19729680A1 (de) * | 1997-07-11 | 1999-01-14 | Grundmann Dieter Dipl Paed Ing | Verfahren zur Abwasserbehandlung unter besonderer Beachtung der Ozonung |
JP3397096B2 (ja) * | 1997-09-19 | 2003-04-14 | 栗田工業株式会社 | 生物汚泥のオゾン処理装置および方法 |
-
1999
- 1999-12-07 FR FR9915427A patent/FR2801880B1/fr not_active Expired - Fee Related
-
2000
- 2000-10-25 WO PCT/FR2000/002973 patent/WO2001042150A1/fr active Search and Examination
- 2000-10-25 BR BR0016220A patent/BR0016220A/pt not_active Application Discontinuation
- 2000-10-25 JP JP2001543454A patent/JP2004501739A/ja active Pending
- 2000-10-25 CA CA 2394359 patent/CA2394359C/fr not_active Expired - Fee Related
- 2000-10-25 EP EP00971503A patent/EP1240108A1/fr not_active Withdrawn
- 2000-10-25 ES ES00971503T patent/ES2180462T1/es active Pending
- 2000-10-25 US US10/148,077 patent/US6780319B1/en not_active Expired - Fee Related
- 2000-10-25 AU AU10349/01A patent/AU1034901A/en not_active Abandoned
- 2000-10-25 DE DE1240108T patent/DE1240108T1/de active Pending
Non-Patent Citations (1)
Title |
---|
See references of WO0142150A1 * |
Also Published As
Publication number | Publication date |
---|---|
ES2180462T1 (es) | 2003-02-16 |
DE1240108T1 (de) | 2003-03-06 |
WO2001042150A1 (fr) | 2001-06-14 |
JP2004501739A (ja) | 2004-01-22 |
BR0016220A (pt) | 2002-09-10 |
AU1034901A (en) | 2001-06-18 |
US6780319B1 (en) | 2004-08-24 |
FR2801880B1 (fr) | 2002-02-22 |
CA2394359A1 (fr) | 2001-06-14 |
CA2394359C (fr) | 2008-12-23 |
FR2801880A1 (fr) | 2001-06-08 |
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Inventor name: PUJOL, ROGER Inventor name: MECHINEAU, ANNE |
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Effective date: 20081114 |