Uasb reactor is a methaneproducing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. Upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used for wastewater treatment. Startup characteristics of a granulebased anammox uasb. The process has a sludge blanket in the reactor zone, through which the influent wastewater flows.
Uasb reactor startup for the treatment of municipal wastewater followed by advanced oxidation process 717 brazilian journal of chemical engineering vol. The usab design is tailor made to suit the wastewater characteristics given in table 2. Mar 02, 2016 deals with uasb reactors for the primary treatment of sewage, stabilization of sludge and removal of bod. The computeraided design cad files and all associated content posted to this website are created, uploaded, managed and. Upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used in the treatment of wastewater.
Upflow anaerobic sludge blanket uasb technology, normally termed as uasb reactor, is a form of anaerobic digester for wastewater treatment. Comparative performance of upflow anaerobic sludge blanket. Tbw, modified after 6 the influent point sewage is situated at the reactor bottom, the effluent discharge treated wastewater is situated in the upper part of the reactor, thus forcing the entering sewage to follow an upflow regime and to get into contact with the sludge blanket in the reactor. Deals with uasb reactors for the primary treatment of sewage, stabilization of sludge and removal of bod. Of all the anaerobic wastewater treatment processes currently used, the upflow anaerobic sludge bed uasb and the anaerobic biofilm fluidized bed abfb reactors have an excellent potential to become highly competitive for municipal wastewater treatment. The experiments focused on attachment of cells to nonwoven fabric sheets as well as on the stability of mature granules under elevated saline conditions in a labscale uasb reactor. Waterleau is a pioneer in the field of anaerobic wastewater treatment, offering a complete range of adapted anaerobic reactor types. It is a methaneproducing digester which uses an anaerobic process and forming a blanket of granular sludge and is processed by anaerobic microorganism. The gastight, glass uasb reactor schottduran, mainz, germany was operated at 33 1c.
Perspectives are different frameworks from which to explore the knowledge around sustainable sanitation and water. Separation between the biogas, sludge and wastewater, 2. Upflow anaerobic sludge blanket reactor uasb sswm find. Download free excel spreadsheets for engineering calculations. Design of upelow anaerobic sludge blanket reactor for treatment of. The hybrid reactor designcombines an lower section functionally identical to an uasband an upflow af on top, the idea being to combine the strengths of each approach in a single tank. The simulations were made in the commercial software ansys cfx. Methane production by treating vinasses from hydrous ethanol using. The uasb reactor is by far the most widely used high rate anaerobic system for anaerobic sewage treatment. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total organic pollution to the food processing industry alone. This effluent was collected in a 21 l container, stored at 4 c, and pumped into the nitrifyingdenitrifying reactor under fedbatch mode. It is a maintenancefree, corrosionfree and rugged process with a straightforward design.
This reactor type is very well suited for wastewater. Murugesan manonmaniam sundaranar university, sri paramakalyani centre for environmental sciences, alwarkurichi 627 412, tamil nadu, india key words. The usab design is tailor made to suit the wastewater characteristics given in. A wide variety of uasb options are available to you, there are 261 suppliers who sells uasb on, mainly located in asia.
Other processes, such as stabilisation ponds, may be applied in lower temperature regions, but occupying much larger areas and being subjected to a decrease in performance during winter. Thus, the lowermost 30 to 50 percent uasb like portion of the reactor volume is responsible for flocculant andor granular sludge. The maximum capacity chemical oxygen demand cod loading in upflow anaerobic sludge blanket uasb reactors is evaluated using three 8. In other cases, reactions play essential safety and environmental protection roles. The grabcad library offers millions of free cad designs, cad files, and 3d models. Upflow anaerobic sludge blanket uasb reactors are being used with. Different inclinations of the gas deflector were considered, to assess its influence on the velocity field inside the reactor. A skilled operator is required to monitor the reactor and repair parts, e. The dimensions of the primary sedimentation tank, cmas reactor, secondary sedimentation tank and anaerobic digester were set up to. Sizing of uasb upflow anaerobic pond for wastewater.
A plexiglass upflow anaerobic sludge blanket uasb reactor figure 1 was used in this study. Zeeman and lettinga 1999 developed a model for the calculation of the hrt when a certain srt is a prerequisite, and this model can be used for preliminary sizing of a uasb reactor. Before direct treatment of wastewater, the uasb reactor passes through a startup. Waterleau is a pioneer in the field of anaerobic wastewater treatment, offering a complete range biotim uasb animation on vimeo. Uasb design calculations spreadsheet archives low cost easy. This research work was completely funded by comsats research grant program. Reactors jordan university of science and technology. Treatment of municipal wastewater in upflow anaerobic. If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Currently, the uasb reactor is the most popular anaerobic system of high rate used in. In this thesis, a model describing the uasb reactor behaviour with respect to. Lim abstract some characteristics of upflow anaerobic sludge blanket uasb, expended granule sludge blanket egsb, and static granular bed reactor sgbr were investigated in order to compare performances of the three and recognize advantages and disadvantages, respectively. Prior to executing an experiment, the software and hardware of the control. Nitrogen and sulfide removal from effluent of uasb reactor in.
Uasb design calculations spreadsheet low cost easy to use. Application of neural network for simulation of upflow anaerobic. A fullscale uasb reactor for treatment of pig and cattle. The reactor was fed with effluent from an uasb reactor treating synthetic substrate simulating domestic sewage. Reactor which is used in the waste water treatment. Apr 24, 2018 waterleau biotim upflow anaerobic sludge blanket reactor uasb. A software is developed to make economical design of uasb reactor for different type of wastewater by adopting maximum loading conditions, based on. Pdf uasb reactor startup for the treatment of municipal. Upflow anaerobic sludge blanket, or uasb, is a form of anaerobic oxygenfree digester used in wastewater treatment. Up flow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester which used in wastewater treatment. An important sludge treatment method historically has been uasb which is a form of anaerobic digestion of sludge. Desludging is infrequent and only excess sludge is removed every 2 to 3 years. Uasb reactors can be adapted for the treatment of almost any type of wastewater if modi.
Paques has applied the biopaq uasb technology for more than twenty years and has standardized the reactor into a modular system. Waterleau biotim upflow anaerobic sludge blanket reactor uasb. Ppt high rate anaerobic wastewater treatment powerpoint. Slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects. The srt is determined by the amount of sludge that can be retained in the reactor and the daily excess sludge production. Uasb or egsb reactors use gasliquidsolids gls separators and overflow weirs in the reactor top section to a separate biogas and biomass and b settle and return biomass to the reactor sludge bed. Anaerobic reactors international water association. A model to describe the processes occurring in a uasb reactor was developed and an experimental study of the anaerobic wastewater treatment systems in nicaragua was also performed. It was seeded with 250 ml of granular anaerobic sludge obtained from a potato processing. A schematic flow diagram of the process is shown here. This work performed a threedimensional numerical study to describe the hydrodynamics of upflow anaerobic sludge blanket reactor treating domestic wastewater. Uasb reactor, the volume was set up to achieve a hrt of 8 hours, which is the average hrt used for uasb reactors working at a temperature of 20oc elmitwalli et al. Chapter 4 anaerobic sewage treatment using uasb reactors. Treatment of municipal wastewater in upflow anaerobic sludge blanket uasb reactor dr.
In the case of a relatively low strength wastewater such as sewage, the. Anaerobic treatment of municipal wastewater in uasbreactors. Waterleau is a pioneer in the field of anaerobic wastewater treatment. Upflow anaerobic sludge blanket digestion wikipedia. The uasb reactor is a methanogenic methaneproducing digester that evolved from the anaerobic clarigester. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane.
Zamanzadeh 1department of environmental engineering, graduate school of the environment, university of tehran, iran. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over. The upflow anaerobic sludge blanket uasb process is a frequently applied method in the biological treatment of industrial effluents. The conditioned wastewater is then pumped at a constant, continuous flow to the biothane uasb reactor. Determination of design criteria for uasb reactors as a. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it. Uasb reactors waste water treatment plant software. Wastewater enters the reactor from the bottom, and flows upward. Furthermore, the phvalue and temperature are regulated and nutrients are dosed if necessary to achieve optimal growth conditions for the anaerobic biomass in the biothane uasb reactor. May 17, 2017 the process has a sludge blanket in the reactor zone, through which the influent wastewater flows. Technical problems ensuing from uasb reactor application in. Biofilm formation and granule properties in anaerobic. Uasb was developed in 1970s by letinga in the netherlands. The biogas was collected by means of a threephase separator installed at the top of the uasb reactor.
The anaerobic reactor is a upflow anaerobic sludge blanket reactor uasb. No page on the subject would be complete without it, as follows. Modifications to uasb such as uasb ponds, anaerobic baffle reactors, migrating blanket reactors are also described here. Various components of a uasb reactor are described and design details are included.
The anaerobic digestion of sludge using uasb reactors in the water industry. Join the grabcad community today to gain access and download. The potential anaerobicaerobic treatment of increased. Comparisons between the uasb and the egsb reactor seung j. Water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. The wastewater was pumped semicontinuously from an influent tank into the uasb reactor. Uasb model rodriguez gomez, raul antonio, moreno, luis on. In this work we investigated biofilm formation and functionality of granular anaerobic sludge in uasb reactors at 10 and 20 gl sodium. A similar but variant technology to uasb is the expanded granular sludge bed egsb digester.
The tank content was not mixed to avoid introduction of air. This favours the formation of granules and well settling flocs. Uasb reactor startup for the treatment of municipal wastewater. The modified uasb reactor proposed in this study provided a. Background for a uasb design calculations spreadsheet the upflow anaerobic sludge blanket wastewater treatment process is typically used for treatment or pretreatment of wastewaters with a high bod concentration. Upflow anaerobic sludge blanket uasb reactor in wastewater. In the first stage, startup was with glucose for 14 days and then the reactor. The upflow anaerobic sludge blanket reactor uasb is a single tank process. Grey water treatment in upflow anaerobic sludge blanket uasb reactor at different. Anaerobic granular sludge bed technology is widely used in wastewater treatment and uasb is a proven process and becoming more and more popular for high strength industrial wastewater because of its. Technical problems ensuing from uasb reactor application.
Apr 10, 2014 upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used in the treatment of wastewater. A special influent distribution system ensures that the. Design of an anaerobic digester for wastewater treatment. The uasb reactor was operated with an upflow velocity of 0. The uasb is a centralized treatment technology that must be operated and maintained by professionals. Hydraulic retention time hrt 4 h chosen in table 1, the height of sludge is hs 3 5 m the height of setting area hse 1. Fish processing effluent, uasbr, granulation, cod reduction. We design uasb upflow anaerobic sludge blanket process reactors. Wastewater engineering, offers environmental engineering, water and wastewater treatment plant process, planning, design, permitting, consulting services for industrial, commercial, municipal, and private clients to prevent air, land, water, wastewater and storm water pollution. A comparison of upflow anaerobic sludge bed usab and the. Uasb design calculations spreadsheet low cost easy to. Anaerobic digestion technology in poultry and livestock.
Comparisons between the uasb and the egsb reactor seung. Uasb reactor startup for the tr eatment of municipal wastewater followed by advanced oxidation process 725 brazilian journal of chemical engineering vol. Before direct treatment of wastewater, the uasb reactor passes through a start up. Maximum cod loading capacity in uasb reactors at 37 by herbert h. In this study, a granulebased anammox uasb reactor seeded with anaerobic granular sludge was started up, and startup properties were investigated. Determination of design criteria for uasb reactors as a wastewater pretreatment system in tropical small communities 1a.
Reactors reactions are usually the heart of the chemical processes in which relatively cheap raw materials are converted to more economically favorable products. Low cost engineering calculations software available for convection heat transfer coefficients, pipe flowfriction factor calculations, partially full pipe flow calculations, watershed time of concentration, rational method, orifice and venturi meter flow rate calculations, open channel flow measurement, activated sludge. Uasb reactor is an attractive alternative for regions in hot climates since it works better under mesophilic conditions and it does not need any supporting structure for the development of microorganisms, which grow in the form of granules. The wastewater enters the reactor through a well designed distribution system and is distributed equally over the bottom of the reactor.
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