The uasb reactor can be designed as circular or rectangular. Additional arrangements for biogas management would also be needed. A pilot scale study was set up to investigate the principle design parameters of up flow anaerobic sludge blanket uasb reactors for treating wastewater of small. These reactors provide enough residence time for the reaction to take place with satisfactory conversion. 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. Anaerobic digestion of alkaline bleaching wastewater from.
Design of the uasb, p1 peristaltic feed pump, p2 peristaltic recycle. They are necessary for the calculation of further process, design and operational parameters e. A laboratory scale uasb reactor was fabricated with a capacity of 3. Upflow anaerobic sludge blanket uasb reactors have been widely used for. The uasb reactor design is based on a special upflow rate regime. Pdf proposed design of upflow anaerobic sludge blanket. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane. Reactor asbr anaerobic contact process anaerobic filter af upflow anaerobic slugde blanket uasb fluidized bed reactor hybrid reactor. Design and calculation uasb reactor for sludge treatment. Thus extremely high srt could be maintained irrespective of hrt. Anaerobic processes chapter 10 used for treatment of sludges and high strength usually 1500 mgl cod waste waters can now be used for dilute strength waste waters if a fixed film system is used 90% of new treatment processes in developing countries i. This excel spreadsheet can be used to calculate the required uasb reactor volume and dimensions, sludge production rate, methane production rate, and required alkalinity addition based on user input information on wastewater flow and characteristics. Design and calculation uasb reactor for sludge treatment scribd. The team will utilize existing reactors designed in previous years and evaluate performance based upon the design influent flow rate, hydraulic retention time, biogas yield and cod removal efficiency.
Since the srt is larger than the hrt for uasb reactors, their reactor volume. Anaerobic reactor design concepts for the treatment of. Pdf design and working of a lab scale uasb reactor for. The pharmaceutical industry under study has the main products like penicillin, erythromycin and its derivatives. It can be estimated the concentration of solids using the following equation.
Uasb af able to retain very high concentration of active biomass in the reactor. Characteristics of wastewater and design parameters in each uasb. Optimal design and operation of a uasb reactor for dairy cattle. 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. Professor, department of bioenergy, agricultural engineering college and research institute, tamil nadu agricultural. In general, for temperature between 15 and 35 degrees c, the reactor can be designed for loading between 1. The discussion focused on concrete structure of uasb reactor, including dimension calculation and determination principle. Upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used for wastewater treatment the uasb reactor is a methanogenic methaneproducing digester that evolved from the anaerobic clarigester. Anaerobic digestion has been applied increasingly over the last decades for sewage treatment, especially in regions with a warm climate. A schematic flow diagram of the process is shown here. The influent distribution system and different distributors were introduced.
Main uasb reactor free download as powerpoint presentation. Pdf optimal design and operation of a planned fullscale uasb reactor at a dairy farm are determined using optimization algorithms based on. Design criteria one of the most important aspects of the anaerobic process applying uasb reactors is its ability to develop and. Modular design can be preferred when the volume of reactor exceeds about 400 m3. Chapter 4 anaerobic sewage treatment using uasb reactors. Uasb reactor treating leachate from acidogenic fermenter in twophase anaerobic digestion of food waste, wat. Separation between the biogas, sludge and wastewater, 2. The waste water, coming from these products is highly concentrated with b.
The sludge bed is a layer of biomass that forms at the bottom of the reactor, and contains granules of a high settling velocity. But, unfortunately, this type of ad treatment can only handle quite low contamination levels in effluents, but with the. An example uasb design calculations spreadsheet is partially shown in the image below. Reactors jordan university of science and technology. The raw wastewater originating from the industrial process requires pretreatment to prepare it for the anaerobic treatment process. The design of uasb reactors is very simple and does not require the. The upflow anaerobic sludge blanket process uasb has been around for many years, so it clearly can work well. Treatment of municipal wastewater in upflow anaerobic.
Optimal design and operation of a planned fullscale uasb reactor at a dairy farm are determined using optimization algorithms based on steady state simulations of a dynamic ad process model combined with models of the reactor temperature and heat exchanger temperatures based on energy balances. A wide variety of uasb options are available to you, there are 249 suppliers who sells uasb on, mainly located in asia. The upflow anaerobic sludge bed reactor uasb was developed in the netherlands in the. The purpose of this paper is to discuss the design procedures of uasb system. In this paper, anaerobic reactors are evaluated considering the historical evolution and types of wastewaters. Calculation procedure for a conventional uasb reactor uasbc treating municipal sewage is a downloadable file that contains three spreadsheets, for uasbb, uasbc and uasbr design. Anaerobic fluidized bed afb reactor aguaclara dashboard. Readers of this book can download a spreadsheet for computeraided design and optimization of uasb reactors, complete with sections for biogas, sludge and posttreatment, that will show the reader alternative designs of all aspects of uasb reactor design and complementary treatment units with every mouse click. Determination of design criteria for uasb reactors as a.
It is a maintenancefree, corrosionfree and rugged process with a straightforward design. Page 3 of 14 emw ater elearning course project funded by the european union lesson b3. Anaerobic treatment of municipal wastewater in uasbreactors. Download as pptx, pdf, txt or read online from scribd. This research was carried out to study the feasibility of uasb process as a pretreatment alternative for ahwaz sewage treatment. The biogas production rate, which was measured by wet type gas meters based on the design of mosey and matthews 1982, and the ph of the effluent were measured daily throughout the experiment. Based on the governing equations, the calculation and simulation were conducted to estimate the reaction parameters.
Cstr continuous stirred tank reactor and the pfr plug flow reactor. The design and the operational parameters of the pilotscale. Anaerobic sewage treatment overview and summary today sewage is the largest pollutant on a global scale, as particularly in developing countries, only a. Design of uasbr upflow anaerobic sludge blanket reactor. In such reactors, the reaction rate expression must be known determined. A similar but variant technology to uasb is the expanded granular sludge bed egsb digester. System footprint for an individual residence, a uasb reactor receiving septic tank effluent would have a volume between 35 and 70 ft3. One of the most common reaction rates is the power law expression. The performance of a uasb react or was assessed by applying various hydraulic retention times. Water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. Download fulltext pdf download fulltext pdf optimal design and operation of a uasb reactor for dairy cattle manure article pdf available in computers and electronics in agriculture 111. Design of upflow anaerobic sludge blanket uasb reactor for jam industry wastes m. The startup of two upflow anareobic sludge blanket uasb reactors seeded with aerobic activated sludge and treating brewery wastewater is presented in this thesis.
Uasb design calculations spreadsheet low cost easy to. Design and calculation uasb reactor for sludge treatment free download as excel spreadsheet. The stabilized digester sludge is returned to the uasb reactor where. Introduction in the technical design for anaerobic. 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. It is necessary to select proper range of operating parameters for design, such as, olr, slr, superficial liquid upflow. Optimal design and operation of a planned fullscale uasb reactor at a dairy farm. Gas liquid solids separator glss device in the uasb reactor the main aim.
Anaerobic treatment of raw domestic wastewater in a uasbdigester. Engineering excel spreadsheets low cost easy to use. Determination of design criteria for uasb reactors. Also, the top part of the reactor includes a means for collecting the methane biogas generated by the anaerobic process. Process flow diagram and uasb reactor design dimensions in ram ified otherwise. Hrt from srt equation assuming i depth of reactor ii the effective depth of the. In most of the monitoring, the uasb reactor operated with a mean ph of 7. Treatment of municipal wastewater in upflow anaerobic sludge blanket uasb reactor dr. Brazil abstract a 120 m3 uasb reactor for domestic wastewater treatment was designed and built, based upon results obtained through the operation of a 106 l. Calculation shows that in the prevailing conditions, 1. The anaerobic fluidized bed afb team was created to work within the wastewater subteam to operate and analyze benchscale anaerobic reactors. Proposed design of upflow anaerobic sludge blanket uasb for mapua institute of technology project by. Thus, the lowermost 30 to 50 percent uasblike portion of the reactor volume is responsible for flocculant andor granular sludge. Flow measurements should be part of continuous process control.
Uasb egsb applications for industrial wastewater treatment medhat m. Uasb reactor design calculation pdf uasb reactor design calculation pdf. The olr to be used for design of uasb reactor for different temperature is provided by lettinga and hulshoff. Performance of upflow anaerobic sludge blanket uasb.
Pdf optimal design and operation of a uasb reactor for. Frederico hermann jr, 345, cep 05489, sao paulo, sp. Effect of recirculation rate on anaerobic treatment of. Pdf optimal design and operation of a uasb reactor for dairy. Download this upflow anaerobic sludge blanket process ebook and keep it on your hard drive for later reference. In this equation, cnhaobnd represents the chemical formula of the biodegrad.
Uasb reactor startup for the treatment of municipal wastewater followed by advanced oxidation process 717 brazilian journal of chemical engineering vol. Uasbegsb applications for industrial wastewater treatment medhat m. Startup of uasb reactors treating municipal wastewater. The design principle and methods of pretreatment system and uasb reactor were emphasized. Optimal design and operation of a uasb reactor for dairy. Main uasb reactor sewage treatment anaerobic digestion. Upflow anaerobic sludge blanket digestion wikipedia. The two reactors were inoculated with granules from a pilotscale uasb reactor treating clari. 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 startup of uasb reactors is a complicated process and a number of factors, including wastewater characteristics, acclimatization of seed sludge, ph, nutrients, presence of toxic compounds, loading rate, upflow velocity, hydraulic retention time, liquid mixing and reactor design affect the growth of sludge bed souza, 1986, barbosa and sant anna, 1989, foresti, 2002.
Sludge ages in uasb reactors usually exceed 30 days, leading to stabilization of the excess sludge removed from the system. Experience shows that the present uasb reactor design and construction is quite different from the. The methane gas is captured in a reservoir at the top of the reactor and may be used for energy reclamation. Design of upflow anaerobic sludge blanketuasb reactor. Free shipping to and from repair facility the plan was to expand to these markets in the first update. The bmp of domestic wastewater was determined at 35 c according to a procedure described by zhang et al.
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