EP3186202A1 - Système de conditionnement du débit de recirculation d'une usine de traitement de boues activées - Google Patents

Système de conditionnement du débit de recirculation d'une usine de traitement de boues activées

Info

Publication number
EP3186202A1
EP3186202A1 EP15751102.3A EP15751102A EP3186202A1 EP 3186202 A1 EP3186202 A1 EP 3186202A1 EP 15751102 A EP15751102 A EP 15751102A EP 3186202 A1 EP3186202 A1 EP 3186202A1
Authority
EP
European Patent Office
Prior art keywords
conditioning system
section
treatment plant
recirculation flow
sludge treatment
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Withdrawn
Application number
EP15751102.3A
Other languages
German (de)
English (en)
Inventor
Ranieri De Ferrante
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP3186202A1 publication Critical patent/EP3186202A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C02F11/08—Wet air oxidation
    • C02F11/083—Wet air oxidation using deep well reactors
    • 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
    • C02F11/02—Biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • 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
    • C02F3/22—Activated sludge processes using circulation pipes
    • C02F3/223—Activated sludge processes using circulation pipes using "air-lift"
    • 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 present Invention concerns a conditioning system of the recirculation flow of an active siudge treatment plant.
  • the invention relates to a system of the said type, with the aim of improving the effect of the recirculation flow and consequently increasing the potential of active siudge treatment plants of traditional type.
  • the invention refers to the field of the depuration of civil and industrial waste water, by means of an aerobic treatment performed bya more or less prolonged airing of the waters themeseifves within a biological reactor in the presence of a suspended microbial population (biomass).
  • a suspended microbial population biomass
  • an active sludge plant is represented by a reaction tank (aerobic, anoxic or anaerobic) where the contact, takes place between the bacterial population and the exhaust to be purified.
  • the aerated mixture, coming out from the tank, is sent to the sedimentation section where the flakes of active siudge are separated from the purified effluent, which can then be downloaded from the surface of the decanter, while the sludge is partially reintroduced info the system, by means of a circuit of recirculation, and partly is removed periodically as excess sludge to be disposed.
  • the solution according to the present invention aims to develop a system that allows also an active sludge treatment piant of traditional type to exploit all the components of action of a vertical reactor systems (including therefore the chemical oxidation and the bacterial lysis) and then, at least in part, to simulate their performance.
  • Purpose of the present invention is therefore to provide a conditioning system of the recirculation flow of an active sludge treatment plant that allows to overcome the limits of the treatment pianis of conventional type, le without a vertical reactor and to obtain the technical results previously described.
  • a further object of the invention is that said conditioning system can be realized with substantially contained costs, as fa? ' as both production costs and operating costs is concerned.
  • Another object of the invention is to propose a conditioning system of the recirculation flow of an active sludge treatment plant which is simple, safe and reliable.
  • a conditioning system of the recirculation flow of an active sludge treatment plant said plant comprising a biological section, an oxidation section, a sedimentation section and optionally a thickening section
  • said conditioning system being characterised in that It comprises a vertical reactor, having a depth equal to 40m or higher, said vertical reactor being provided internally with a compressed air distribution system and with one or more air lift conduits, said conditioning system comprising additionally a system of collection of sludge from said sedimentation section, from said oxidation section or from said thickening section and a system of feeding back of conditioned sludge at the head of the treatment plant.
  • said vertical reactor has an internal diameter of 300 - 1 100mm and said air lift conduits have diameter much smaller than that of said vertical reactor, more preferably in the range 2 - 5 inches.
  • said compressed air distribution system is comprised of air diffusers, said air lift conduits and said diffusers being connected to a same compressor.
  • system has continuous operation and, generally, does not require the addition of installed power significantly.
  • the system significantly reduces the production of sludge In excess and thus reduces very importantly the costs and the difficulties of management of the plant. Additionally, being the amount of sludge to be treated lower, the system allows the reduction of the line dedicated to sludges and consequently the recovery of areas to be used for other purposes.
  • the implementation of the conditioning system of the recirculation flow of an active sludge treatment plant according to the present invention improves the ability of the plant to which it is applied approximately of 10-15%, and lowers the operating cost of 15-25% (value determined using as a basis the economic parameters of the standard systems operating, for example, in Italy).
  • the conditioning system of the recirculation flow of an active sludge treatment plant allows to assign to other uses up to 20% of the existing area, greatly reduces odors and indirect pollution, by reducing the amount and increasing the rate of digestion of excess sludge to be disposed of.
  • FIG. 1 some major components of an active sludge treatment piant of traditional type are shown, and in particular, the biological section 1 , the sedimentation section 2 and the thickening section 3 of excess sludge
  • the water treated in the biological section 1 Is conveyed to the sedimentation section 2 through line 4.
  • the line 5 of the purified water the sine 6 of excess sludge pumped to the thickening section 3 and the line 7 of recirculation of the sludge to the biological section 1.
  • the figure additionally shows a conditioning system of the recirculation flow according to the present invention, Indicated as a whole by the reference number 10, fed with a part of the sludge of the recirculation flow through a line 8 and which conveys the treated sludge again in the line 7 of recirculation of the sludge to the biological section 1 (but more In general at the head of the treatment plant, understood as any section of the plant before the sedimentation section) through the line 9.
  • the conditioning system 10 of the recirculation flow is made up of components described below and In the first place by a connection system, of which is also a part the line 8 for feeding the conditioning system 10 of the recirculation flow, which allows the removal of sludge from the sedimentation section 2, but which can also pick up the sludge from the end of the oxidation section (not shown) or also from the thickening section 3.
  • the second component of the conditioning system 10 is a tank 1 1 , 8
  • a vertical reactor 12 which can be made of reinforced concrete, metal sheet or prefabricated, of a depth consistent with the hydraulic profile of the existing treatment plant, at the center of which is positioned a vertical reactor 12, which has a depth of 40-120 meters, and an inner diameter of 300-1 100 mm, preferably but not necessarily made with a steei jacket and a high density polyethylene (HOPE) jacket said vertical reactor 12 being positioned in an appropriate manner with respect to the existing purification plant, and provided internally with one or will more conduits of upflow due to the dragging operated by air introduced from the outside by a pump, aiso called air lift conduits (not shown), of a diameter much less than that of the vertical reactor (in the order of 2 ⁇ ⁇ 5 inches).
  • HOPE high density polyethylene
  • the air lift conduits should be as small as possible to increase the speed of ascent with equal volume of sludge, but at the same time iarge enough to allow an upward flow without hindrance and a sufficient number of repetition of the cycles of compression, oxygenation and depressurization 29.
  • inside the vertical reactor 12 is also disposed a compressed air distribution system, realized by means of d iff users that can be connected to the same compressor which supplies the air Isft conduits. St is important to note that the entry of air inside the reactor does not have the objective of producing oxygenation by itself, whether biological or chemical, but mainly to allow the bacteria to store gas which, in the ascent phase inside the air lift conduits, can increase in size, causing the lysis of the bacteria themselves.
  • the conditioning system 10 of the recirculation flow is provided with a return system, which is also part of the line 9, which connects, in water tight manner, the tank 1 1 of the conditioning system 10 to the biological section 1 (but more generally to the head of the treatment plant, understood as any section of the plant which precedes the sedimentation section), allowing the recirculation of the biological material resulting from the conditioning treatment.
  • the conditioning system 10 is provided with a system of gates, valves and controls, managed directly or by means of PC, which allows to direct the various flows, with particular attention to the flow outgoing from the air lift conduits, alternatively and/or simultaneously in partial mode, in the recirculation flow to the head of the treatment plant, In the recirculation flow within the tank 1 1 to get more conditioning cycles, or to a storage tank of sludge.
  • the conditioning system 10 may be provided with a system of spilling of the sludge In excess, which can replace or work with the thickening section, if present, by exploiting the ability of the conditioning system to concentrate the sludge by flotation.
  • conditioning system 10 An extreme case of use of the conditioning system 10 according to the present invention occurs in the case where to the conditioning system 10 is conveyed only the sludge in excess, and the recirculation flow is reduced to the partly clarified waters.
  • the conditioning system 10 acts in a pure digester mode, conditioning and reducing very importantly - more than 50% - the excess sludge to be disposed of, without, however, having any effect on overall performance of the plant to which it is applied.
  • the conditioning system 10 acts in a pure digester mode, conditioning and reducing very importantly - more than 50% - the excess sludge to be disposed of, without, however, having any effect on overall performance of the plant to which it is applied.
  • the conditioning system 10 acts in a pure digester mode, conditioning and reducing very importantly - more than 50% - the excess sludge to be disposed of, without, however, having any effect on overall performance of the plant to which it is applied.
  • the tank 1 1 of the conditioning system would have a reversed frusto - pyramidal shape, to facilitate the flotation effect.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Activated Sludge Processes (AREA)

Abstract

La présente invention concerne un système de conditionnement (10) du débit de recirculation (7) d'une usine de traitement de boues actives, ladite usine comprenant une section biologique (1), une section d'oxydation, une section de sédimentation (2) et, de manière facultative, une section d'épaississement (3), ledit système de conditionnement (10) étant caractérisé en ce qu'il comprend un réacteur vertical (12), ayant une profondeur égale à 40 m ou plus, ledit réacteur vertical comportant à l'intérieur de celui-ci un système de distribution d'air comprimé et un ou plusieurs conduits à émulsion d'air, ledit système de conditionnement (10) comprenant en outre un système de collecte de boues à partir de ladite section de sédimentation (2), à partir de ladite section d'oxydation ou à partir de ladite section d'épaississement (3) et un système de renvoi des boues conditionnées au niveau de la tête de l'usine de traitement.
EP15751102.3A 2014-06-06 2015-06-08 Système de conditionnement du débit de recirculation d'une usine de traitement de boues activées Withdrawn EP3186202A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM20140293 2014-06-06
PCT/IT2015/000149 WO2015186152A1 (fr) 2014-06-06 2015-06-08 Système de conditionnement du débit de recirculation d'une usine de traitement de boues activées

Publications (1)

Publication Number Publication Date
EP3186202A1 true EP3186202A1 (fr) 2017-07-05

Family

ID=51454853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15751102.3A Withdrawn EP3186202A1 (fr) 2014-06-06 2015-06-08 Système de conditionnement du débit de recirculation d'une usine de traitement de boues activées

Country Status (2)

Country Link
EP (1) EP3186202A1 (fr)
WO (1) WO2015186152A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6733662B2 (en) * 2001-02-23 2004-05-11 V.A.I. Ltd. Methods and apparatus for biological treatment of waste waters
WO2010058434A1 (fr) * 2008-11-24 2010-05-27 Hawk Partners Sas Digesteur à réacteur vertical pour des boues biologiques
ITRM20110341A1 (it) * 2011-06-28 2012-12-29 H C Dev S R L Impianto di depurazione di acque reflue civili ed industriali a reattore verticale, con migliorate caratteristiche di trattamento dell?azoto.
ITRM20110340A1 (it) * 2011-06-28 2012-12-29 H C Dev S R L Impianto di depurazione di acque reflue civili ed industriali a reattore verticale.

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2015186152A1 *

Also Published As

Publication number Publication date
WO2015186152A1 (fr) 2015-12-10

Similar Documents

Publication Publication Date Title
CN103979740B (zh) 脱氮除磷恒水位序批式活性污泥法处理污水系统及其方法
CN202131185U (zh) 养殖场污水处理系统
CN101967031B (zh) 垃圾渗滤液处理方法
CN204111525U (zh) 一种养殖业废水处理系统
CN108383320B (zh) 一种畜禽养殖废水的集成处理方法
CN202175599U (zh) 一种处理vc制药废水装置
CN103449684A (zh) 一种高毒性焦化酚氰废水处理回用系统及废水处理回用方法
CN104211252B (zh) 垃圾渗滤液短程硝化反硝化脱氮工艺
CN103910431A (zh) 两级sbr利用污泥内碳源强化城市生活污水脱氮耦合污泥减量的装置与方法
CN101386445A (zh) 一种水泵驱动式折流内循环生物反应器及其使用方法
CN102863117A (zh) 一种处理高浓度有机废水的工艺及其装置
CN204211537U (zh) 一体化兼氧mbr膜生物反应器
CN105366889B (zh) 一种无需外加碳源的城镇污水高标准脱氮除磷系统
CN203820588U (zh) 一种处置养殖场废水的生物接触氧化设备
CN104291518A (zh) 一种高浓度畜禽废水达标排放的处理系统及处理方法
CN103232143A (zh) 一种处理氨氮污水的生态组合装置
CN103073156A (zh) 一种生化法处理聚丁二酸丁二醇酯生产废水的方法
CN203866159U (zh) 一种脱氮除磷恒水位序批式活性污泥法处理污水系统
CN203754502U (zh) 一种分散生活污水一体化处理装置
CN217398562U (zh) 高浓度含氮废水处理系统
CN201971700U (zh) 地埋式污水处理设备
CN202508958U (zh) 一种剩余污泥零排放脱氮除磷装置
WO2015186152A1 (fr) Système de conditionnement du débit de recirculation d'une usine de traitement de boues activées
CN109928500B (zh) 一种脱氮除磷处理农村生活污水的好氧颗粒污泥反应器
CN103833142B (zh) 一种阿科蔓生态沟渠污水处理装置

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20170424

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20190129

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

PUAJ Public notification under rule 129 epc

Free format text: ORIGINAL CODE: 0009425

32PN Public notification

Free format text: COMMUNICATION IN EXAMINATION PROCEEDINGS (EPO FORM 2001 DATED 24/04/2020)

PUAJ Public notification under rule 129 epc

Free format text: ORIGINAL CODE: 0009425

32PN Public notification

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205 DATED 23/10/2020)

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20200905