WO2021165980A1 - Bioréacteur à fonctionnement discontinu à culture microbienne fixée à zones multiples et procédé de traitement biologique d'eaux usées domestiques - Google Patents

Bioréacteur à fonctionnement discontinu à culture microbienne fixée à zones multiples et procédé de traitement biologique d'eaux usées domestiques Download PDF

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Publication number
WO2021165980A1
WO2021165980A1 PCT/IN2020/050548 IN2020050548W WO2021165980A1 WO 2021165980 A1 WO2021165980 A1 WO 2021165980A1 IN 2020050548 W IN2020050548 W IN 2020050548W WO 2021165980 A1 WO2021165980 A1 WO 2021165980A1
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WIPO (PCT)
Prior art keywords
zone
bio
aeration
reactor
carrier
Prior art date
Application number
PCT/IN2020/050548
Other languages
English (en)
Inventor
S Kanmanai
S Amal Raj
S Sowndarya
S Jagannathan
Mohamed Salah
P Ganesh Kumar
Original Assignee
Anna University, Chennai
L&T Construction Limited, Water And Effluent Treatment - Ic
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 Anna University, Chennai, L&T Construction Limited, Water And Effluent Treatment - Ic filed Critical Anna University, Chennai
Publication of WO2021165980A1 publication Critical patent/WO2021165980A1/fr

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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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/308—Biological phosphorus removal
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/301—Aerobic and anaerobic treatment in the same reactor
    • 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
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • 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
    • C02F3/10—Packings; Fillings; Grids
    • C02F3/103—Textile-type packing
    • 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

  • TITLE A multi-zone attached growth batch bio-reactor & method of biological treatment of domestic wastewater
  • the present invention relates to sewage and waste water treatment and in particular relates to multi-zone attached growth batch bio-reactor and method of biological of treatment wastewater using a multi-zone attached growth batch bio-reactor.
  • CPCHEEO reuse standards mandate the concentration of phosphorus to be 1 mg/L (toilet flusing) and 2 mg/L (gardening).
  • EIA notification 2006 (Appendix II), states that for constructions exceeding 20,000 m 2 should have on-site facilities in their premises for collection, treatment and facilities for reuse or safe disposal of sewage.
  • ASP activated sludge process
  • SBR was developed to overcome difficulties of effective treatment of organic removal.
  • Sequencing Batch Reactor is a modification of activated sludge process which has been employed as an efficient technology because of its simple configuration and high efficiency in organics removal. Accommodation of large fluctuations in the incoming wastewater flow is a major advantage of SBR technology.
  • SBR sequencing batch bio film reactor
  • the prior art W02004002904 relates to biofilm-activated sludge Sequencing Batch Reactor and a process.
  • the reactor includes a first tank interconnected to a second tank for retaining wastewater and discharging wastewater therefrom & carriers for growth of biomass provided in each tank and a controller to create a condition for the growth of biomass on said carriers within each tank.
  • the reactor utilizes a multi-stage SBR configuration receiving either continuous or intermittent inflow of wastewater.
  • Each stage has individually controlled continuous or alternating 60 Anaerobic/anoxic/aerobic operation, with or without mixing and recycling from the other stage(s).
  • the configuration and operation is dependent upon the treatment objectives and effluent discharge requirements.
  • the another prior art WO 1999044951A1 elaborates a wastewater treatment system which utilizes an interacting surge anoxic mix zone for facilitating nitrogen removal and an aerobic sequential batch reaction, clarification and decantation zone for facilitating aeration for BOD removal and nitrate production for the surge anoxic mix zone. Sludge reduction may also be accomplished by anaerobic recycle.
  • the primary objective of the present invention provides a compact design and systematic configuration of batch bio-reactor for efficient treatment of domestic sewage applications. It is another objective of present invention, provides dedicated zone for removal of phosphorus, nitrogen and organics. It is another objective of the present invention, provides dedicated zone in a 85 single processing vessel. It is another objective of the present invention, provides domestic sewage treatment by batch process. It is another objective of the present invention, wherein the bio-reactor houses both suspended and attached growth culture in a single reaction vessel. 6. It is another objective of the present invention, is to introduce specially designed bio carrier in the bio-carrier zone, wherein the bio-carrier used is polypropylene textile media.
  • It is another objective of the present invention, is to provide simultaneous action of nitrification and denitrification for removal of nitrogen in a dedicated zone.
  • It is another objective of the present invention, is to provide efficient removal of phosphorus and organics in a dedicated zone.
  • HRT hydraulic retention time
  • It is yet another objective of the present invention, is to offer a simple & compact solution and could be scaled to full-scale applications for treatment of low to 110 medium strength wastewaters.
  • dedicated zone wherein dedicated zone have a facultative anoxic zone, a bio-carrier zone for growth of bio-mass in communication with anoxic zone; a aeration zone in communication with bio-carrier zone, wherein the said anoxic zone is disposed adjacent to the said bio-carrier zone and the said aeration zone is disposed above the bio-carrier zone and each zone is interlinked with a passage for transfer of waste water treatment.
  • It is further aspect of the present invention describes about an inlet for introducing waste water to be treated in the facultative anoxic zone; a pump in communication with inlet for periodically transferring wastewater from inlet to facultative anoxic zone; a outlet passage in communication with said aeration zone for processed wastewater to drain and for re-circulation; and decantation means for withdrawing liquid from the top of aeration zone or any other zones within the system,
  • the facultative anoxic zone consists of anaerobic zone in a lower part thereof. It is another aspect of the present invention, wherein inlet is communicated to said facultative anoxic zone through a passage and pump means thereby communicating the said facultative anoxic zone.
  • the said aeration zone has an outlet passage communicated to inlet for recirculation of activated mixture to be 145 processed for re-treatment.
  • bio -carrier zone and aeration zone consist of aeration devices such as air diffusers for introducing air or oxygen containing gas to said bio-carrier zone and aerobic zone and disposed at the bottom of the each zones so that aeration through said aeration devices causes circulation of wastewater between the bio-carrier zone and aeration zone and providing aerobic environment for the micro-organism.
  • aeration devices such as air diffusers for introducing air or oxygen containing gas to said bio-carrier zone and aerobic zone and disposed at the bottom of the each zones so that aeration through said aeration devices causes circulation of wastewater between the bio-carrier zone and aeration zone and providing aerobic environment for the micro-organism.
  • bio-carrier zone having aerobic and anoxic environment and consists of bio-carrier or solid support for attachment of microbial biomass, wherein the said solid support is polypropylene textile media, and said solid support is fixed and stationary.
  • MSS mixed liquor suspended solids
  • the facultative anoxic zone is provided for phosphorus release and denitrification
  • the bio-carrier zone is provided for removal of nitrogen through simultaneous nitrification and denitrification, organic removal and phosphorus uptake
  • the aeration zone is provided for removal of organics and nutrients.
  • the present invention has achieved volume reduction of 17%, sludge reduction of 15%, total HRT is 4 hours Therefore, the present invention has achieved lesser sludge reduction, lesser foot print, lesser power consumption, lesser sludge production and lesser retention time.
  • the present invention is advantageous when compared with existing prior art, where there is no primary treatment, additional clarifier or customized coagulant is used for settlement of solid particles or floes and offers a simple & compact solution and could be scaled to full-scale applications for treatment of low to medium strength wastewaters.
  • Figure 1 exhibits perspective view of multi-zone attached batch bio-reactor 200 configuration of the present invention.
  • F/M Ratio is Food to Microorganism Ratio MLSS is Mixed Liquor Suspended Solids
  • ACTIVATED SLUDGE Sludge particles produced in raw or settled wastewater (primarily effluent) by the growth of organisms (including zoogleal bacteria) in aeration tanks in the presence of dissolved oxygen.
  • the term “activated” comes from the fact that the particles are teeming with bacteria, fungi, and protozoa.
  • Activated sludge is different from primary sludge in that the sludge particles contain many living organisms which can feed on the incoming wastewater.
  • ACTIVATED SLUDGE PROCESS A biological wastewater treatment process which speeds up the decomposition of wastes in the wastewater being treated. Activated sludge is added to wastewater and the mixture (mixed liquor) is aerated and agitated. After some time in the aeration tank, the activated sludge is allowed to settle out by sedimentation and is disposed of (wasted) or refused (returned to the aeration tank) as needed. The remaining wastewater then undergoes more
  • AERATION The process of adding air to water.
  • wastewater treatment air is added to refreshen wastewater and to keep solids in suspension.
  • mixtures of wastewater and activated sludge adding air provides mixing and oxygen for the microorganisms treating the wastewater.
  • AEROBES Bacteria that must have molecular (dissolved) oxygen (DO) to survive.
  • DO molecular oxygen
  • AEROBIC BACTERIA Bacteria which will live and reproduce only in an environment containing oxygen which is available for their respiration (breathing), namely atmospheric oxygen or oxygen dissolved in water. Oxygen combined chemically, such as water molecules (H20), cannot be used for respiration by aerobic bacteria.
  • ANAEROBIC A condition in which atmospheric or dissolved molecular oxygen is NOT present in the aquatic (water) environment.
  • ANAEROBIC BACTERIA Bacteria that live and reproduce in an environment containing no “free” or dissolved oxygen. Anaerobic bacteria obtain their oxygen supply by breaking down chemical compounds which contain oxygen, such as sulfate (S042-).
  • ANAEROBIC DIGESTION Wastewater solids and water (about 5% solids, 95% water) are placed in a large tank where bacteria decompose the solids in the absence of dissolved oxygen.
  • ANOXIC Oxygen deficient or lacking sufficient oxygen.
  • BOD Biochemical Oxygen Demand. The rate at which organisms use the oxygen in water or wastewater while stabilizing decomposable organic matter under aerobic conditions. In decomposition, organic matter serves as food for the bacteria and energy results from its oxidation. BOD measurements are used as a measure of the organic strength of wastes in water.
  • BACTERIA Bacteria are living organisms, microscopic in size, which usually consist of a single cell. Most bacteria use organic matter for their food and produce waste products as the result of their life processes.
  • BIOMASS A mass or clump of organic material consisting of living organisms feeding on the wastes in wastewater, dead organisms and other debris.
  • CLARIFIER Settling Tank, Sedimentation Basin. A tank or basin in which wastewater is held for a period of time during which the heavier solids settle to the bottom and the lighter material will float to the water surface.
  • COAGULANTS Chemicals that cause very fine particles to clump (floe) together into larger particles. This makes it easier to separate the solids from the water by settling, skimming, draining or filtering.
  • COAGULATION The clumping together of very fine particles into large particles (floe) caused by the use of chemicals (coagulants).
  • DETENTION TIME The time required to fill a tank at a given flow or the theoretical time required for a given flow of wastewater to pass through a tank.
  • DIFFUSED-AIR AERATION A diffused air activated sludge plant takes air, compresses it, and then discharges the air below the water surface of the aerator through some type of air diffusion device.
  • DIFFUSER A device used to break the air stream from the blower system into fine bubbles in an aeration tank or reactor.
  • DIGESTER A tank in which sludge is placed to allow decomposition by microorganisms. Digestion may occur under anaerobic (more common) or aerobic conditions.
  • DISSOLVED OXYGEN (DO): Molecular (atmospheric) oxygen dissolved in water or wastewater.
  • EFFLUENT Wastewater or other liquid - raw (untreated), partially or completely treated - flowing FROM a reservoir, basin, treatment process or treatment plant.
  • FLOC Clumps of bacteria and particles or coagulants and impurities that have come together and formed a cluster. Found in aeration tanks, secondary clarifiers and chemical precipitation processes. FLOCCULATION: The gathering together of fine particles after coagulation to 330 form larger particles by a process of gentle mixing.
  • INFLUENT Wastewater or other liquid - raw (untreated) or partially treated - flowing INTO a reservoir, basin, treatment process or treatment plant.
  • MICROORGANISMS Very small organisms that can be seen only through a microscope. Some microorganisms use the wastes in wastewater for food and thus remove or alter much of the undesired matter.
  • MIXED LIQUOR When the activated sludge in an aeration tank is mixed with primary effluent or the raw wastewater and return sludge, this mixture is then referred to as mixed liquor as long as it is in the aeration tank. Mixed liquor may also refer to the contents of mixed aerobic or anaerobic digesters.
  • MIXED LIQUOR SUSPENDED SOLIDS Suspended solids in the mixed liquor of an aeration tank.
  • NITRIFYING BACTERIA Bacteria that change the ammonia and organic nitrogen in wastewater into oxidized nitrogen (usually nitrate).
  • Oxidation is the addition of oxygen, removal of hydrogen, or the removal of electrons from an element or compound.
  • organic matter is oxidized to more stable substances.
  • RECIRCULATION The return of part of the effluent from a treatment process to the incoming flow.
  • RETENTION TIME The time water, sludge or solids are retained or held in a 350 clarifier or sedimentation tank.
  • RISING SLUDGE Rising sludge occurs in the secondary clarifiers of activated sludge plants when the sludge settles to the bottom of the clarifier, is compacted, and then starts to rise to the surface, usually as a result of denitrification.
  • a multi-zone attached growth batch bio-reactor comprises of three separate zones in a single processing tank for biological treatment of domestic wastewater.
  • the said anoxic zone (A) is disposed adjacent to the said bio-carrier zone (B) and the said aeration zone (C) is disposed above the bio-carrier zone and each zone is interlinked with a passage for transfer of waste water treatment.
  • FIG. 1 it consists of Collection Tank (F) where the raw sewage is stored in this tank before feeding to anoxic zone (A).
  • a Feed Pump (G), A 2 Hp Pump to transfer raw sewage from (F) to (A) wherein a pump in communication with inlet for periodically transferring wastewater from inlet to facultative anoxic zone (A); a outlet passage in communication with said aeration zone (C) for processed wastewater to drain and for re-circulation; and decantation means for withdrawing liquid from the top of aeration zone (C).
  • the decantation means for withdrawing liquid may be from top of aeration zone or any other zones within the system.
  • Air Supply Lines Valve (J) - (II & 12) is connected to (J) for supply of air is distributed to (B) & (C).
  • inlet is communicated to said facultative anoxic zone (A) through a passage and pump means thereby communicating the said facultative anoxic zone (A).
  • the aeration zone (C) has an outlet passage communicated to inlet for recirculation of activated mixture to be processed for re-treatment.
  • the facultative anoxic zone (A) consists of anaerobic zone in a lower part thereof.
  • the bioreactor consists of agitator for homogenous mixing of mixture and is disposed in the said facultative anoxic zone (A) till half of the said tank.
  • the bio-carrier zone (B) and aeration zone (C) consist of aeration devices such as air diffusers for introducing air or oxygen-containing gas to said bio-carrier zone and aerobic zone and disposed at the bottom of the each zones so that aeration through said aeration devices causes circulation of wastewater between the bio-carrier zone and aeration zone and providing aerobic environment 385 for the micro-organism.
  • aeration devices such as air diffusers for introducing air or oxygen-containing gas to said bio-carrier zone and aerobic zone and disposed at the bottom of the each zones so that aeration through said aeration devices causes circulation of wastewater between the bio-carrier zone and aeration zone and providing aerobic environment 385 for the micro-organism.
  • the bio-carrier zone (B) consists of aerobic and anoxic environment. In a preferred embodiment, the bio-carrier zone (B) consists of solid support for attachment of microbial biomass.
  • solid support may be any other media made up of polymer based materials.
  • solid support is polypropylene textile media.
  • solid support is fixed and stationary.
  • it consists of stainless steel mesh in a bio-carrier zone and/or aeration zone.
  • it consists of stainless steel mesh, wherein the said stainless steel mesh is disposed in between the said bio-carrier zone (B) and said aeration zone (C), so that it arrests the bio-carriers moving to aeration zone and maintains homogenous mixed liquor suspended solids (MLSS) concentration in the said reactor whereas no mesh shall be provided for stationary media.
  • the mesh physically separates (B) and (C) which avoids escaping of the media from (B) to (C).
  • facultative anoxic zone is provided for phosphorus release and denitrification
  • Bio-carrier zone is provided for removal of nitrogen through simultaneous nitrification and denitrification, organic removal and phosphorus uptake.
  • aeration zone is provided for removal of organics and nutrients.
  • Raw Sewage from the anna university campus is pumped into the collection tank from a manhole stationed at a distance of 150 m from the tank.
  • Raw Sewage first enters into this collection tank (F) wherein the raw sewage is stored in this tank before feeding to Facultative Anoxic Zone(A). Then, by using Feed Pump (G) , A 2
  • Anaerobic zone is formed in bottom half depth & Anoxic zone is formed in the top half due to non- supply of air; Phosphate Accumulating Organisms (PAOs) release polyphosphates in Anaerobic condition by consuming the Volatile Fatty Acids (VFAs), wherein VFAs are formed from Organics (BOD & COD) due to anaerobic reaction on organics.
  • Agitators 1 &2 (El & E2) is placed in the Half Depth of (El). These agitators in (A) & (C) supports uniform mixing of the sewage; establishes anoxic zone in that part & anaerobic zone in the bottom part.
  • the media zone (B) has the Fixed Film Media responsible for Simultaneous Nitrification & Denitrification. Nitrogen Removal is processed by Aerobic Nitrification & Anoxic Denitrification. The biofilm is formed on the surface of the fixed media.
  • the outer layer of the biofilm is under aerobic condition and supports nitrification & the inner layers are anoxic supporting denitrification,
  • the Media zone is supplied with Oxygen containing Air blown by 2 blowers (II &I2) via supply lines(J), wherein Air Blowers (II & 12),
  • the 0.5 Hp blowers are connected for aeration in (B) & (C) and Air Supply Lines Valve (J) - (II & 12) is connected to (J) for supply of air is distributed to (B) & (C).
  • Aeration Zone wherein this zone is supplied with Oxygen containing Air blown by 2 blowers (II & 12) via supply lines (J).
  • the PAOs reproduce rapidly and consume the polyphosphates.
  • the quantity of polyphosphate uptake will be more than the released phosphates in (A). This is called luxury uptake of phosphorus by PAOs; Breakdown of organics and phosphorus uptake takes place due to aeration (III) in the zone (C).
  • the complex organics (BOD & COD) will break down into simpler compounds due to aeration by (II & 12) through (J).
  • the sewage is allowed to settle for 30 minutes.
  • treated water is allowed to drain or either to recycle by means of decantation process through (H), wherein the Decant port (H), is mainly used for decanting the treated supernatant after settling in (C).
  • a biological domestic wastewater treatment process comprising the steps of: feeding wastewater having a facultative anoxic zone (A), bio-carrier zone (B) and aeration zone (C) in a single processing vessel; providing anaerobic conditions in said facultative anoxic zone so that wastewater circulates between anaerobic and anoxic environment for phosphorus release and denitrification; providing solid support for microbial biomass in the said bio-carrier zone and feeding aerobic and anoxic environment in the bio-carrier zone (B) for removal of nitrogen through simultaneous nitrification and denitrification, organic removal and phosphorus uptake; arresting bio-carriers moving to aeration zone by using stainless steel mesh and maintaining homogenous mixed liquor suspended solids (MLSS) concentration whereas no mesh shall be provided for stationary media; providing aeration zone (C) for sludge present in the content to settle in the aeration zone (C); providing recirculation of part of the sludge settled into the facultative anoxic
  • the bio-reactor has three zones namely A, B and C, where A represents facultative-anoxic zone, B represents bio-carrier zone and C represents aeration zone.
  • An agitator was placed in the facultative cum anoxic zone till half of the tank height for mixing.
  • Air diffusers were placed at the bottom of both bio-carrier zone and aeration zone to provide aerobic environment for the micro-organisms.
  • a stainless steel mesh was placed between bio-carrier zone and aeration zone, as it arrests the bio-carriers moving to other zones and also helps to maintain homogenous mixed liquor suspended solids (MLSS) concentration in the reactor.
  • MMS mixed liquor suspended solids
  • This unique bio-reactor is a single unit provides multiple benefits.
  • the domestic sewage collected in the collection was pumped into the bio-reactor via facultativeanoxic zone and after treatment, the sewage moved to bio-carrier zone and aeration zone through the opening at the top.
  • the facultative-anoxic zone under anaerobic condition (at the bottom), phosphorus accumulating organisms (PAOs) use the energy, released due to hydrolysis of intracellular polyphosphate, hence the polyphosphate is released to store the organic matter. Subsequently it is taken up into the biomass under aerobic condition, which is then disposed during sludge wasting. As a result, phosphorus removal from sewage was achieved.
  • the bio-carrier zone, (media) biofilm technology introduces both aerobic and anoxic condition, which helps for nitrogen removal effectively as nitrification and denitrification takes place simultaneously.
  • the attached growth batch bio-reactor has plurality of bacteria for treatment of domestic sewage.
  • the treatment method is simplified as the organics are utilized as carbon source, in a way the nutrients are removed from the wastewater.
  • the batch bio-reactor configuration is unique as it consists of different conditions in single reactor, possesses benefits of both suspended growth and attached growth system.

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

La présente invention décrit un bioréacteur à fonctionnement discontinu à culture microbienne fixée à zones multiples, et son procédé de traitement biologique d'eaux usées domestiques, constitué d'un seul réservoir de traitement, le réservoir de traitement unique comprenant : une zone anoxique facultative (A), une zone de biovecteur (B) pour la culture de la biomasse en communication avec la zone anoxique ; une zone d'aération (C) en communication avec la zone de biovecteur (B) ; une entrée pour introduire les eaux usées à traiter dans la zone anoxique facultative (A) ; ladite zone anoxique (A) étant disposée de manière adjacente à ladite zone de biovecteur (B) et ladite zone d'aération (C) étant disposée au-dessus de la zone de biovecteur et chaque zone étant reliée à un passage pour le transfert du traitement des eaux usées.
PCT/IN2020/050548 2020-02-19 2020-06-24 Bioréacteur à fonctionnement discontinu à culture microbienne fixée à zones multiples et procédé de traitement biologique d'eaux usées domestiques WO2021165980A1 (fr)

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IN202041007025 2020-02-19

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Cited By (1)

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CN114590955A (zh) * 2022-01-18 2022-06-07 山西建投晋东南建筑产业有限公司 一体化农村污水处理站及其处理方法

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US5518618A (en) * 1992-06-10 1996-05-21 Paques B.V. System and process for purifying waste water which contains nitrogenous compounds
WO2005028373A2 (fr) * 2003-08-20 2005-03-31 Kasparian Kaspar A Systeme a plusieurs zones de traitement biologique des eaux usees dans un receptacle unique
WO2006039786A1 (fr) * 2004-10-12 2006-04-20 Biocast Systems, Inc. Systeme et procede pour le traitement integre multi-zones d'eaux usees

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US4786413A (en) * 1986-01-21 1988-11-22 Linde Aktiengesellschaft Process for biological sewage purification
US5518618A (en) * 1992-06-10 1996-05-21 Paques B.V. System and process for purifying waste water which contains nitrogenous compounds
WO2005028373A2 (fr) * 2003-08-20 2005-03-31 Kasparian Kaspar A Systeme a plusieurs zones de traitement biologique des eaux usees dans un receptacle unique
WO2006039786A1 (fr) * 2004-10-12 2006-04-20 Biocast Systems, Inc. Systeme et procede pour le traitement integre multi-zones d'eaux usees

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ANGELIKA JÖBGEN ; ANNE PALM ; MICHAEL MELKONIAN: "Phosphorus removal from eutrophic lakes using periphyton on submerged artificial substrata", HYDROBIOLOGIA, vol. 528, no. 1-3, October 2014 (2014-10-01), pages 123 - 142, XP019244871, ISSN: 1573-5117, DOI: 10.1007/s10750-004-2337-5 *
FELFÖLDI TAMÁS, JURECSKA LAURA, VAJNA BALÁZS, BARKÁCS KATALIN, MAKK JUDIT, CEBE GÁBOR, SZABÓ ATTILA, ZÁRAY GYULA, MÁRIALIGETI KÁRO: "Texture and type of polymer fiber carrier determine bacterial colonization and biofilm properties in wastewater treatment", CHEMICAL ENGINEERING JOURNAL, vol. 264, 1 March 2015 (2015-03-01), pages 824 - 834, XP055848906, ISSN: 1385-8947, DOI: 10.1016/j.cej.2014.12.008 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114590955A (zh) * 2022-01-18 2022-06-07 山西建投晋东南建筑产业有限公司 一体化农村污水处理站及其处理方法

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