Envirogen announced today that it has introduced a new smallfootprint fluidized bed reactor fbr system designed to treat low flows of seleniumladen coal mining waters economically and efficiently. The use of fluidized bed reactor in wastewater treatment, particularly advanced oxidation processes and biological treatment, represents a unique opportunity for costeffective treatment of wastewater containing recalcitrant. Fluidizedbed bioreactor applications for biological. Circulating fluidized bed reactor design and operation 39 favourable turndown typically 4.
Control of a fluidized bed polyethylene reactor vahidi, omid. The support matrix sand, anthracite, reticulated foam and activated carbon has a large surface area typical particle sizes are 0. Treatment of wastewater in fluidized bed bioreactor using. In this system, care must be taken to avoid the destruction and decomposition of immobilized enzymes. The fluidized bed reactor page university of washington. Investigation of anaerobic fluidized bed reactor aerobic. They consist of a bed of immobilised enzyme which is fluidised by the rapid upwards flow of the substrate stream alone or in combination with a gas or secondary liquid stream, either of which may be inert or contain material relevant to the reaction. The hankin fluidized bed incinerator fbi accepts any proportion of sludge, hazardous liquids, grease or scum. Further reading on fluidized bed reactor fbr denitrification.
There is a problem of increase in biofilm thickness when the microorganisms in the biofilm multiply. Pla doesnt need an input gas from my understanding. The discussion covers liquidsolid and gasliquidsolid fluidized bed reactors and their applications in advanced oxidation processes, biological as well as adsorption processes which are effective wastewater treatment technologies. Evaluation of the inverse fluidized bed biological reactor. Fluidized bed reactor an overview sciencedirect topics.
Fluidized bed reactors for wastewater and groundwater. The distinguishing feature of a fluidized bed reactor is that the bed of solid particles or catalyst is supported by an up flow of gas. The bfb bed can be a blend of biomass particles with inert sand or with. Design and startup of an anaerobic fluidized bed reactor.
Fix bed reactor, fluidized bed reactor in hindi chemical pedia duration. Combining fbr technology with aops can reduce sludge. A particular focus is to describe the relationship between catalyst attrition, solids recovery in the reactor system and chemical performance of the fluidized bed reactor. There are many recent studies on the use of fluidized bed reactor for wastewater treatment using photo fenton oxidation 1012, heterogeneous fenton oxidation, 14, ozone 15, 16, and homogeneous fenton oxidation 17, 18. This site is like a library, you could find million book here by using search box in the header. Pdf fluidized bed biofilm reactor a novel wastewater.
This paper describes a pilot plant scale circulating fluidized bed unit recently designed, constructed and put into operation in the pulp and paper centre at the. The limitation of the fluidized bed reactor in wastewater treatment is the biofilm thickness. Iran mirzaei, ahmad iran polymer and petrochemical institute, faculty of polymerization engineering, tehran, i. The struvite kinetics showed that struvite accumulation preferentially occurs in locations with high mixing energy ohlinger, et al. Pdf fluidized bed reactor fbr can be an efficient alternative solution in advanced water treatment processes. Circulating fluidized bed reactor design and operation. Accordingly, the last few years have seen intensified effort to develop more effective wastewater treatment technologies. Parr fluidized bed reactors are used extensively in the chemical process industries. In the 30s the fluidized bed reactor fbr appeared as a new alternative for biological treatment of wastewaters.
Characteristics of some food processing wastewater. Various types of reactors are in use for wastewater treatment. Jul 31, 2014 compact, containerizable systems suited for remote, small flows and can be networked for costeffective treatment of multiple outfalls. Application of anaerobic fluidized bed reactors in. Feb, 20 these results are in accordance with the results of our study. This is to certify that the thesis entitled fluidized bed reactor. The results are in agreement with the ones obtained using a mixture of municipal and food processing wastewaters containing high organic contents. The different sections of this archive are accessed through the links below.
Units are the vessels or basin that holds wastewater for the treatment by chemical or biological processes. Performance of a threephase fluidized bed reactor with. They are often used when there is a need for large amounts of heat input or output, or when closely. A fluidized bed reactor fbr with activated carbon as support material has been used to investigate the removal efficiency of chemical oxygen demand cod, biochemical oxygen demand bod, and color of textile wastewater.
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. Application of anaerobic fluidized bed reactors in wastewater. Depending upon the flow and operating conditions and the methods of mixing of the wastewater therein, the reactors have the following main types. Hankin is a leader in fluidized bed combustion of sludges generated from municipal and industrial wastewater treatment processes. Phosphorus removal by using fluidized bed reactor system. Evaluation of fluidized bed reactor in treating dyeing effluent. Evaluation of fluidized bed reactor in treating dyeing. Fluidising the bed requires a large power input but, once fluidised, there is little further energetic input needed to increase the flow rate of the substrate stream through the reactor. The heliosolids fluidized bed reactor is a socalled bubbling bed. 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 membrane bioreactor for wastewater. Fluidizedbed reactors fbr have been known for more than 30 years for treating industrial. In the present work a modelling approach is presented which is able to handle the most important aspects of industrial fluidized bed reactors. The fluidized bed biofilm reactor fbbr represents a recent innovation in biofilm processes. A fluidized bed reactor fbr is a type of reactor device that can be used to carry out a variety of multiphase chemical reactions. Compact, containerizable systems suited for remote, small flows and can be networked for costeffective treatment of multiple outfalls. In fluidized bed reactors, the solid particles fluidized by liquid or gas act as a fluid through the reactor. Pdf treatment of the oilfieldproduced water and oil. Depending on the operating conditions and properties of solid phase various flow regimes can be observed in this reactor. Production of electricity during wastewater treatment using. Struvite crystallization using fluidized bed reactors fbrs is one of the most commonly. Fluidized bed reactor fbr membrane bioreactor mbr suspended carrier reactor scr.
Basic design of a fluidized bed reactor for wastewater treatment using fenton oxidation. Fluidized bed reactor university of maryland, baltimore. Hence, at first, the reactor startup on synthetic substrate was evaluated and it was proven that the anaerobic moving bed biofilm reactor technology could successfully treat concentrated wastewater. To read a progress report on the first ever use of fbr technology to treat perchlorate in groundwater destined for drinking water supplies, click here. 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 post treatment of effluent from. Farhana tisa, abdul aziz abdul raman, and wan mohd ashri wan daud.
Bed microbial fuel cells xuyun wang qingdao university of science and technology, college of chemical engineering, key laboratory of clean chemical process, qingdao, china. Fluidized bed reactors are commonly used in catalytic cracking processes. Anaerobic fluidized bed afb reactor aguaclara dashboard. A fluidized bed is a sand bed through which air is blown vertically from bottom to top at a speed that keeps the individual sand particles floating. When used as a pretreatment for a submerged membrane, the fluidized bed miex contactor could remove a significant amount of organic matter in the wastewater 80% removal.
Investigation of anaerobic fluidized bed reactoraerobic moving. 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. Two different recycling and aeration flow rates were used in the experiments. Fluidized aerobic bioreactor 21st century enviro engineers. The performance of a threephase fluidized bed reactor 221 fed in during a period of three days until reaching 18 lh. They are also used in the oxidation of naphthalene to phtalic anhydride, roasting of sulfide ores, coking of petroleum residues, and the calcination of limestone. Fluidized bed reactors for wastewater and groundwater treatment. Basic design of a fluidized bed reactor for wastewater treatment using fenton oxidation april 2014 international journal of innovation and technology management vol. This study showed that the anaerobic fluidized bed reactor aerobic moving bed bio reactor arrangement was an effective and feasible process for removal of organic load from currant wastewater. The application of a fluidized bed technology to biologi cal wastewater treatment has brought a remarkable breaktrough. Aop merge with fbr can be more potential in pollutant.
Fluidizedbed reactors in wastewater treatment are relatively recent innovations. Basic design of a fluidized bed reactor for wastewater. Callely 7 suggests that bacteria have had to acquire the ability to degrade. Fluidizedbed reactors fbr are the most popular reactor configurations. Fluidized bed reactor system for manufactured gas plant groundwater. The performance of a threephase fluidized bed reactor in. These characteristics of a fluidized bed reactor enable an operation at a high volumetric. The aim of these models is to describe the operation of a fluidizedbed reactor in terms of oper ating and design parameters. In this study, a biocarrier made up of low density polypropylene of surface area 524 mm 2 per particle and of density 870 kgm 3 was used in the treatment of wastewater using fluidized bed reactor. Youbin zheng and siobhan dunets university of guelph, guelph, ontario, canada precipitation or chemical dosing is a basic method of dissolved phosphorus phosphate removal, and the main commerciallyemployed method for treating various types of.
Production of electricity during wastewater treatment using fluidized. Four kilograms of catalyst with particles size of 100. Read online basic design of a fluidized bed reactor for wastewater. Anaerobic membrane bioreactors have potential for energyefficient treatment of domestic and other wastewaters, membrane fouling being a major hurdle to application. At high flow rates and low reactor diameters almost ideal plug flow characteristics may be achieved. The particle size of immobilized enzymes is an important factor for. International journal of innovation, management and technology, vol. A fluidized bed is a physical phenomenon occurring when a quantity of a solid particulate substance usually present in a holding vessel is placed under appropriate conditions to cause a solidfluid mixture to behave as a fluid.
Simulation for supporting scaleup of a fluidized bed. Treatment of textile wastewater with an anaerobic fluidized. Applications of fluidized bed reactors in wastewater. The characteristics of the swine wastewater are given in table 1. The number of pvc support particles used comprised 0. Bottom port for input gas and a gas distributor plate to make it a fluidized bed reactor, side ports to inject additional reactantscatalysts or remove product. New smallscale fluidized bed reactor systems water.
The anaerobic fluidized bed membrane bioreactor for energy. Fluidized bed reactors are excellent contacting devices and have the potential to enhance the effectiveness and. One technology that has been shown to have high efficiency in wastewater treatment is the circulating fluidized bed bioreactor cfbbr, which was developed at the university of western ontario, canada. Treatment of chemical production wastewater containing. Tga as a fixed bed and the tgfbr as a fluidized bed, the pyrolysis kinetics of olive kernels was studied. Fuel characterization, mass and power balances, produced gas composition, gas phase alkali and ammonia, tar concentration, agglomeration tendencies, and gas efficiencies were assessed. Industrial wastewater treatment with anaerobic moving bed. Immobilization of microorganisms on the small, fluidized particles of the medium results in a high reactor biomass holdup which enables the process to be operated at significantly higher liquid throughputs with the practical absence of biomass washout.
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 velocities to suspend the solid and cause it to behave as though it were a fluid. This article describes the bed expansion characteristics of a downflow anaerobic fluidized bed reactor treating a synthetic wastewater. Bioreactors contain open, mixed population microbial cultures which also acquire a diverse. Pdf basic design of a fluidized bed reactor for wastewater. The particle size of immobilized enzymes is an important factor for the formation of a smooth fluidized bed. 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. May 20, 2017 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. This is a pdf file of an unedited manuscript that has been accepted for publication. Emphasis is placed on correct reactor design which, as will be shown, reduces to choosing. Introduction in general, biofilm process is rising well favoured over activated sludge systems as for nutrient and organic carbon removal.
The fluidized bed reactor in the anaerobic treatment of wine. The use of fluidized bed reactor in wastewater20 treatment, particularly. One technology that has been shown to have high efficiency in wastewater treatment is the circulating fluidizedbed bioreactor cfbbr, which was developed at the university of western ontario, canada. Fluidized bed reactors for anaerobic wastewater treatment. The figure below illustrates a continuous fluidized bed reactor. The novelty of this technology for wastewater treatment was fbbr combine both activated sludge and tf in one process. In the present study, the experimental work to performance study of anaerobic fluidized bed reactor for the wastewater. In this study, a fluidized bed miex reactor a semicontinuous process was used as a pretreatment for a submerged membrane. Degradation of pollutant in fluidized bed reactor involves chemical reactions and liquidsolidgas flow structures.
Basic design of a fluidized bed reactor for wastewater treatment. This results in the medium then having many properties and characteristics of normal. The article gives an overview on fundamentals and applications of fluidized. 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 aerobic fluidized bed reactor was found to be more effective in treating the textile dyeing wastewater for a maximum cod removal of 83.
In section two of the research, the hydrodynamic characteristics of. The fluidized bed reactor in the anaerobic treatment of. The anaerobic fluidized bed reactor with immobilized biomass has been widely used for the biological treatment of the wastewater. Although accumulation of material inside the reactor was a main problem, this was avoided by removing and adding bed media along gasification. Part 3 fluidised catalytic cracking unit and hydrocracker. Chemical engineering and reactor design of a fluidised bed. A fluidized bed is a physical phenomenon occurring when a quantity of a solid particulate. Chemical engineering and reactor design of a fluidised bed gasifier.
These reactors generally behave in a manner intermediate between cstrs and pbrs. 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. The reactor features integrated heat recovery, a stable fluidization and combustion process, and integrated flue gas cleaning. The technology owes its highrate success to much higher surface area and biomass concentration than those that can be achieved in the conventional treatment processes. Fluidized bed magnetic ion exchange miex as pretreatment. Fluidized beds are biofilm reactors with a wide range of applications in. Fluidized bed reactor university of maryland, baltimore county. Continuousflow stirred tank reactor cfstr or completelymix reactor. Subsequently, a study on fort garry brewery wastewater was. Envirogen announced today that it has introduced a new smallfootprint fluidized bed reactor fbr system designed to treat low flows of seleniumladen coal mining waters economically. Characteristics of currant wastewater used in the present study. My thinking was to use the same body for all of the reactors, though with progressively more ports for additional capabilities. These results are in accordance with the results of our study.
212 1268 601 1195 710 623 843 1145 43 906 1183 696 645 1169 1523 481 750 747 455 793 218 810 1188 827 350 1561 1029 158 1001 356 513 1384 1264 215