Biofilm growth in an anaerobic fluidized bed reactor springerlink. Microbial fuel cells mfcs are a promising technology for energyefficient domestic wastewater treatment, but the effluent quality has typically not been sufficient for discharge without further treatment. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total. Anaerobic digestion of dairy wastewater by inverse fluidization. Biofilm growth in an anaerobic fluidized bed reactor. Since the early 70s, anaerobic treatment of industrial wastewaters has gained considerably in importance. Air gasification of rice husk in bubbling fluidized bed reactor with bed heating by conventional charcoal. Previous groups have designed afb reactors to handle a flow rate of 0. Fluidized bed reactor adds some advantages to the fenton procedures such as, uniform heat and mass transfer, reduction of sludge production, less oxidant usage and more users friendly. Volume 33, issue 11, november 2008, pages 24582466. The reactor to be studied is anaerobic fluidized bed reactor afbr which is known as the most efficient reactor for high organic loading rate. Research and development programmes led by both engineers and microbiologists have resulted in a better understanding of the microbiology of anaerobic reactions and reactor design for anaerobic processes. Fluidized bed reactors have been used and design for different physical and chemical process for example, catalytic cracking, fluid transportation and drying. Organic loadings were changed from 2 to 40 gcodkggac.
At high enough velocities fluid drag plus buoyancy overcomes the gravity force and the bed expands. Anaerobic fluidized bed membrane bioreactor for municipal wastewater treatment at ambient temperatures investigators. The anaerobic fluidized bed and the expanded granular sludge bed reactors, with hrts of about 24 h 4 and the. Anaerobic fluidized bed reactors for biological denitrification bioactive fbr processes receive considerable attention in water and wastewater treatment because they have several advantages over conventional processes such as activated sludge, fixed bed or packed bed biofilm reactors, rotary bed contactors, and upflow sludge blanket reactors. Sand was used as the support material 306 g with a diameter between 1. University of groningen particle transport in fluidized. The fluidized bed technology can offer many advantages related with the use of. Anaerobic fluidized membrane bioreactor polishing of baffled reactor effluent during treatment of dilute wastewater. Anaerobic wastewater treatment anaerobic fluidized bed reactors biogas. Anaerobic fluidized bed membrane bioreactor for municipal. Influence of upflow velocity on performance and biofilm. Startup of an anaerobic fluidized bed reactor for landfill.
Pdf support material selection for anaerobic fluidized bed. Fluidized bed reactor fbr in order to achieve fluidization of the biomass particles, units must be operated in an upflow mode. The anaerobic fluidized bed membrane bioreactor afmbr is a new energyneutral methanogenic biological treatment system that combines an anaerobic fluidized bed reactor afbr and. In this type of reactor, a fluid gas or liquid is passed through a granular solid material usually a catalyst possibly shaped as tiny spheres at high enough velocities to suspend the solid and cause it to behave as though it were a fluid. The fluidized bed reactor in the anaerobic treatment of wine. Application of anaerobic fluidized bed reactors in. The fluidized bed reactor in the anaerobic treatment of wine wastewater. The anaerobic fluidized bed membrane bioreactor for energyefficient wastewater reuse subject presentation by perry mccarty, stanford university, at the hydrogen, hydrocarbons, and bioproduct precursors from wastewaters workshop held march 18 19, 2015. The fluidized bed reactor in the anaerobic treatment of. Anaerobic ammonium oxidation discovered in a denitrifying. Effect of carrier materials in inverse anaerobic fluidized bed. Fluidizedbed gac granular activated carbon anaerobic reactor was applied to treat artificial wastewater which contains high concentration of phenol as well as acetic acid. Until now, oxidation of ammonium has only been known to proceed under aerobic conditions. Startup and steady state operation of anaerobic fluidized bed reactors afbrs with biolite as the inert carrier material was studied.
Us4505819a method for the anaerobic degradation of. The performance of a threephase fluidized bed reactor 221 fed in during a period of three days until reaching 18 lh. Article pdf available in biochemical engineering journal. A fluidized bed reactor fbr is a type of reactor device that can be used to carry out a variety of multiphase chemical reactions. Moreover apparatus is disclosed for the purification of waste water using a fluidizedbed reactor wherein a liquid introduction device is present which is formed by one or more separate inlet pipes, the pipes delivering the liquid. Anaerobic treatment methods are more suitable for the treatment of concentrated wastewater streams, offer lower operating costs, the production of usable biogas product. The anaerobic fluidized bed membrane bioreactor for energy. Newton the fluidizedbed reactor has the ability to process large volumes of fluid. Treatment of pome by pilot plant anaerobic fluidised bed. Although reactor optimization can be conducted experimentally, it. This is equivalent to a specific anaerobic ammonium oxidation rate of. Fluidized bed reactor basic mechanism, mass transfer in fluidized beds, reaction behaviour in a fluidized bed, mole balance on the bubble, the cloud, and the slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Fluidized bed reactors for anaerobic wastewater treatment. Design and startup of an anaerobic fluidized bed reactor.
Performance evaluation of an anaerobic fluidized bed reactor with natural zeolite as support material when treating highstrength distillery wastewater. Anaerobic up flow fluidized bed reactor performance as a. Anaerobic fluidized bed membrane bioreactors for the. Consequently, a detailed design of a fluidized bed reactor that would allow flexible operation at high temperature and high pressure at several gas velocities will be conducted in order to serve for the future development of new hydrodynamic models. Anaerobic fluidized bed afb reactor aguaclara dashboard. The fluidized bed reactor was made of acrylic, measuring 100 cm high by 4 cm in internal diameter and a total volume of 1. A twostage laboratoryscale combined treatment process, consisting of microbial fuel cells and an anaerobic fluidized bed membrane bioreactor mfcafmbr, was examined here to produce.
Expanded bed reactors have a bed expansion of 10% to. Investigation of anaerobic fluidized bed reactor aerobic moving bed bio reactor afbrmmbr system for treatment of currant wastewater. The anaerobic fluidized bed biofilm reactor afbbr, which uses small, fluidized media for cell immobilization and retention, is a recent process innovation in wastewater treatment. An anaerobic fluidized bed reactor, using sepiolite as support, for the treatment of distillery wastewater was startedup using a stepped loading regime with addition of methanol. The present work develops two experiences with anaerobic fluidized bed reactors afbr using both cuban raw material, activated carbon and natural zeolite, as support media, with the purpose of obtaining high organic matter removal rates and keeping sulfide and ammonium concentrations in. Pdf autotrophic growth of anaerobic ammoniumoxidizing. Fluidized bed reactor provided a greater treatment efficiency at higher loadings. Modeling and design of anaerobic fluidized bed reactor.
After the description of the characteristics of threephase fluidized bed and theoretical aspects which could affect the operation of an anaerobic reactor, the design considerations and recommendations based upon characteristics of the wastewater to be. Impact of acclimation methods on microbial communities and. Anaerobic fluidized bed reactor with sepiolite as support. In this type of reactor, a fluid gas or liquid is passed through a solid granular material usually a catalyst possibly shaped as tiny spheres at high enough speeds to suspend the solid and cause it to behave as though it were a fluid.
Degradation of high concentrations of nonionic surfactant linear alcohol ethoxylate in an anaerobic fluidized bed reactor. A system for the anaerobic bacterial degradation of organic material in waste water, comprising introducing the waste water into a contact reactor, pumping the waste water into the bottom of a fluidized bed reactor containing anaerobic bacteria attached to the particles in the bed, the fluidized bed reactor having an effective volume not more than 0. Investigation of anaerobic fluidized bed reactor aerobic. The anaerobic fluidized bed and the expanded granular sludge bed reactors, with hrts of about 24 h and the uasb reactor, with an hrt of 48 h offer good results, while the attached growth process named anaerobic filter needs a longer hrt on assuming constant organic loading rates for all systems.
The reactor used this study was made of a plexiglass column being 60 mm diameter, 140 cm height, and a. During the past ten years, anaerobic process has become a popular technology for treating concentrated effluents. Considerable progress has been achieved in the development of high rate. Review on the application of anaerobic fluidized bed reactors in. Anaerobic membrane bioreactors have potential for energyefficient treatment of domestic and other wastewaters, membrane fouling being a major hurdle to application. These experiments showed that ammonium was biologically oxidized with hydroxylamine as the most probable electron acceptor. Rate of liquid flow and the resulting degree of bed expansion determines whether the reactor is termed a fluidized bed or expanded bed system.
Pdf basic design of a fluidized bed reactor for wastewater. Performance evaluation of an anaerobic fluidized bed. Considerable progress has been achieved in the development. Pdf design and startup of an anaerobic fluidized bed. A novel metabolic pathway for anaerobic ammonium oxidation with nitrite as the electron acceptor has been elucidated using 15niabelled nitrogen compounds. The hydroxylamine itself is most likely derived from nitrite. Box 1, 2600 ma delft the netherlands received november 20, 1988 b37 abstract since the early 70s, anaerobic treatment of industrial wastewaters has gained. Anaerobic digestion of dairy wastewater by inverse. The aim of this study was to investigate the performance of an anaerobic.
Chemical enginering dose with kirtan joshi 4,659 views. The aim of this study was to investigate the performance of an anaerobic fluidized bed reactor afbraerobic moving bed bio reactor mbbr in series arrangement to treat currant wastewater. The aim of the present work is the performance evaluation of a fluidized bed reactor in the anaerobic treatment of a wastewater deriving from the washing operations of the wine industry. Anaerobic up flow fluidized bed reactor performance. The reactor was made of a plexiglass column 60 mm in diameter, 140 cm in height, with a volume of 3. Anaerobic fluidized membrane bioreactor polishing of.
Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. Fluidized bed reactors for anaerobic wastewater treatment water. Anaerobic fluidized bed treatment of an industrial wastewater. Pdf investigation of anaerobic fluidized bed reactor. Application of anaerobic fluidized bed reactors in wastewater treatment. Startup and concomitant biofilm development of afbrs was performed using two common startup techniques, the maximum efficiency profile mep technique and the maximum load profile mlp technique. Low velocity high velocity p for increasing u0 until onset of fluidization p increases, then becomes constant. Inverse fluidized bed reactor method was suggested for anaerobic treatment of wastewater 1. The fall 2016 anaerobic fluidized bed reactor afb group is focused on assessing the treatment capabilities of an afb reactor through the removal of chemical oxygen demand cod and the production of biogas. Metabolic pathway of anaerobic ammonium oxidation on the.
Fixed and fluidized beds university of california, berkeley. Anaerobic fluidized bed membrane bioreactor for municipal wastewater treatment at ambient temperatures epa grant number. Fluidized bed reactor anaerobic las degradation was evaluated in a reactor with biomass immobilized in sand 1. Both nitrate and ammonium consumption increased with concomitant gas production. A fluidized bed reactor fbr is a type of reactor device that can be used to carry out a variety of. It was found that fouling can be controlled if membranes are placed directly in contact with the granular activated carbon gac in an anaerobic fluidized bed bioreactor afmbr used here for posttreatment of effluent from.
Bed length for increasing u0 l is constant until onset of fluidization and then begins to increase. An anaerobic fluidized bed membrane bioreactor afmbr is a new and effective method for energyefficient treatment of low strength wastewater, but the factors that affect performance are not well known. In this study an anaerobic fluidized bed membrane bioreactor afmbr is added as a second stage to an. Anaerobic treatment of the young landfill leachate in a pilotscale fluidized bed reactor was performed to observe the effects of startup on cod removal, biogas production and biomass attachment. Two different recycling and aeration flow rates were used in the experiments. Six different steady states at hydraulic retention times between 0. Investigation of anaerobic fluidized bed reactoraerobic moving. Hach company, usa in accordance with manufacturers manual.
Due to the large exothermic of the ocm reaction, a fluidized bed reactor enables an almost isothermal reactor. Fluidized bed reactor an overview sciencedirect topics. During the experiments, the organic loading rate olr was increased gradually from 2. Use of activated carbon and natural zeolite as support. Although fluidized bed fenton have been studied much, few or no significant studies have been done on the studying the design procedures for fbrfenton. Pdf fluidized bed reactor fbr can be an efficient alternative solution in advanced water treatment processes.
Review on the application of anaerobic fluidized bed. A twostage microbial fuel cell and anaerobic fluidized. The present invention relates to a process for the anaerobic purification of waste water which comprises a fluidizedbed process in which granular sludge is applied. The number of pvc support particles used comprised 0. The effect of upflow velocity on performance and biofilm characteristics of an anaerobic fluidized bed reactor was studied in treating currant wastewater at various loading rates. Basic design of a fluidized bed reactor for wastewater. Due to increasing importance of treatment of wastewater in fbr critical examinations of the. Anaerobic fluidized bed membrane bioreactor for wastewater. The inverse fluidized bed and the inverse turbulent bed reactors.
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