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. Once the kinetics is known, the reactor design can be made based on material balance. Optimization of process and physical design of anaerobic and complementary processes focuses on process design and deals with startup procedures and steady state performance of uasb reactors, as well as the influence of operation on reactor performance. Get file genitourinary side effects have included retention. Uasb reactor the problem associated with anaerobic filters and fbrs has led to development of unpacked reactors that still incorporate an immobilized form of particulate biomass. Thus, the lowermost 30 to 50 percent uasblike portion of the reactor volume is. Description download design and calculation uasb reactor for sludge treatment comments. It is necessary to select proper range of operating parameters for design, such as, olr, slr, superficial liquid upflow velocity referred as liquid upflow velocity, and hrt.
Pressurised water procedure for unblocking inlet pipes. Pdf proposed design of upflow anaerobic sludge blanket. Article pdf available in environmental engineering and management journal 55. Conversion and reactor sizing define conversion and space time. 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. Chapter 4 anaerobic sewage treatment using uasb reactors. Effect of recirculation rate on anaerobic treatment of. The key issues and approaches of uasb reactor design including guidelines for the design of the physical components of the reactor are discussed, in addition to a. In order to monitor the granularity of anaerobic sludge, the determination of the granule size distribution is of vital importance. Table 10 3 results of the design procedure for a uasbb reactor with a retention. For an ideal cstr reactor, the residence time required for the reaction is given by.
Write the mole balances in terms of conversion for a batch reactor, cstr, pfr, and pbr. Design and calculation uasb reactor for sludge treatment free download as excel spreadsheet. Along with tww, lfs from lr was also introduced into uasb reactor. Anaerobic digestion has been applied increasingly over the last decades for sewage treatment, especially in regions with a warm climate. Design and calculation uasb reactor for sludge treatment scribd. Generally, there are two ways to design uasb reactor which are based on hrt or olr. An example uasb design calculations spreadsheet is partially shown in the image below. Separation of inflow to each uasb cell, ventilation, sampling and excess sludge systems not shown, for clarity. 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.
Feb 02, 2017 in most of the monitoring, the uasb reactor operated with a mean ph of 7. Reactor design within excel enabled by rigorous physical. Proposed design of upflow anaerobic sludge blanket uasb for mapua institute of technology project by. The olr to be used for design of uasb reactor for different temperature is provided by lettinga and hulshoff. The design principle and methods of pretreatment system and uasb reactor were emphasized. Uasb reactor design calculation pdf uasb reactor design calculation pdf. Influent distribution system to obtain a good performance from uasb reactors, it is essential that the influent substrate is evenly distributed in the lower part of the reactors, to ensure a close contact between the biomass and the substrate. Chapter 4 anaerobic sewage treatment using uasb reactors edx. Comparisons between the uasb and the egsb reactor seung. This reactor will produce most of its power from thorium, with no external input of uranium 233, in the equilibrium cycle. A schematic flow diagram of the process is shown here.
Process flow diagram and uasb reactor design dimensions in ram ified otherwise. Therefore, the actual effluent parameters to the inlet of uasb reactor are as mentioned in table 2. Anaerobic reactor design there are many new concepts in anaerobic reactor design. In general, for temperature between 15 and 35 degrees c, the reactor can be designed for loading between 1. Anaerobic pretreatment of domestic sewage using uasb reactor systems offers a number of advantages, e. Treatment of municipal wastewater in upflow anaerobic sludge blanket uasb reactor dr. Modifications to uasb such as uasb ponds, anaerobic baffle reactors, migrating blanket reactors are also described here. Economic analysis of a large uasb reactor producing biogas. Provision for gas collection was made on the top of. 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.
Uasb reactor composite tww 4 l was fed into uasb reactor daily. Most of the models proposed in the literature are for steady state conditions in the reactor. Uasb reactor demonstrates that sludge settlability and the growth characteristics of both proteindegrading and acetotrophic bacteria are the most important factors influencing on the output of the model. Uasb reactor was exposed to various hrts including 10, 8, 6, 4, and 2 h. Separation between the biogas, sludge and wastewater, 2. The design of uasb reactors is very simple and does not require the.
A similar but variant technology to uasb is the expanded granular sludge bed egsb digester. Various components of a uasb reactor are described and design details are included. Reactors jordan university of science and technology. The indian advanced heavy water reactor ahwradvanced heavy water reactor ahwr is designed and developed to achieve largescale use of thorium for the generation of commercial nuclear power. Uasb design calculations spreadsheet archives low cost. The key issues and approaches of uasb reactor design including guidelines for the design of the physical components of the reactor are discussed, in addition to a design example. Free shipping to and from repair facility the plan was to expand to these markets in the first update. Specialized literature is available and covers a broad range of technologies and process options. Mar 02, 2016 deals with uasb reactors for the primary treatment of sewage, stabilization of sludge and removal of bod. Uasb design calculations spreadsheet low cost easy to.
The procedure was adopted to get the average value of the required. This chapter discusses the design of uasb reactors for sewage treatment. In the past three decades the uasb reactor design has been more or less. Deals with uasb reactors for the primary treatment of sewage, stabilization of sludge and removal of bod. A laboratory scale uasb reactor was fabricated with a capacity of 3. A process model is introduced that allows for optimized design. 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.
Economic analysis of a large uasb reactor producing. Size reactors either alone or in series once given the molar flow rate of a, and the rate of reaction, r a, as a function of conversion, x. The upflow anaerobic sludge blanket uasb process is a frequently applied method in the biological treatment of industrial effluents. Moreno 2010, modelling of a upflow anaerobic sludge blanket reactor, in proceedings of the tenth international conference on modelling, monitoring and management of water pollution, bucharest, june 911 2010, brebbia c. 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. They are necessary for the calculation of further process, design and operational parameters e. 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. Upflow anaerobic sludge blanket uasb technology, normally termed as uasb reactor, is a form of anaerobic digester for wastewater treatment.
Pdf optimal design and operation of a uasb reactor for dairy. Report design and calculation uasb reactor for sludge treatment please fill this form, we will try to respond as soon as possible. In most of the monitoring, the uasb reactor operated with a mean ph of 7. Flow measurements should be part of continuous process control. Aug, 2006 the olr to be used for design of uasb reactor for different temperature is provided by lettinga and hulshoff. Design of baffle in upflow anaeorobic engineering essay.
Comparisons between the uasb and the egsb reactor seung j. The most popular design, the so called uasb upflow anaerobic sludge blanket reactor has no secrets at all, and is very simple to build and operate. 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. A uasb reactor treats wastewater anaerobically and produces biogas as a by. The upflow anaerobic sludge bed reactor uasb was developed in the netherlands in the. Design of upflow anaerobic sludge blanket uasb reactor for jam industry. It is a maintenancefree, corrosionfree and rugged process with a straightforward design. It can be estimated the concentration of solids using the following equation. The reactor has multiple gas hoods for the separation of biogas.
Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. It is necessary to select proper range of operating parameters for design, such as organic loading rate olr, slr, superficial liquid upflow velocity and hydraulic retention time hrt. Determination of design criteria for uasb reactors as a wastewater. May 17, 2017 an example uasb design calculations spreadsheet is partially shown in the image below. The uasb reactor is a methanogenic methaneproducing digester that evolved from the anaerobic clarigester. The raw wastewater originating from the industrial process requires pretreatment to prepare it for the anaerobic treatment process. Upflow anaerobic sludge blanket digestion wikipedia. By nina blahut, shania fang, emily liu, kanha matai march 15, 2019. Anaerobic sludge blanket uasb reactor in tropical and low and moderate temperature countries has been presented.
The purpose of this paper is to discuss the design procedures of uasb system. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total. Startup of uasb reactors treating municipal wastewater. A pilot scale study was set up to investigate the principle design parameters of up flow anaerobic sludge blanket uasb reactors for treating.
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. Inoculum total solids ts, 54 gl and volatile solids vs, 27 gl for uasb reactor was obtained from pilot plant capacity, 12. The discussion focused on concrete structure of uasb reactor, including dimension calculation and determination principle. Design of upflow anaerobic sludge blanket uasb reactor. Pdf design and calculation uasb reactor for sludge. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane.
Pdf optimal design and operation of a planned fullscale uasb reactor at a dairy farm. Cutlip department of chemical engineering university of connecticut storrs, ct, usa. The characteristics of treated bagasse wash water after uasb reactor was as indicated in the table 3. Uasb reactor is based on the socalled threephase separator, which enables the reactor to separate gas, water and sludge mixtures under high turbulence conditions.
Design of an anaerobic digester for wastewater treatment. Anaerobic treatment of municipal wastewater in uasbreactors. Also note that liquid level inside level will be below overflow weir by a height gas pressure 0. Since spring 2017, the aguaclara upflow anaerobic sludge blanket uasb team has been working on a detailed design for a pilotscale, gravitypowered uasb reactor. In the experiments carried out with the uasb reactor, the optimum hrt in terms of bod 5 and cod removal was 6 h in which the organic load applied to the reactor was 2. Design of upflow anaerobic sludge blanketuasb reactor.
They are necessary for the calculation of further process, design and operational. Design of uasbr upflow anaerobic sludge blanket reactor. Reactor design within excel enabled by rigorous physical properties and an advanced numerical computation package mordechai shacham department of chemical engineering ben gurion university of the negev beersheva, israel michael b. It is by far the most widely used highrate anaerobic. The uasb reactor can be designed as circular or rectangular. Determination of design criteria for uasb reactors as a. The influent distribution system and different distributors were introduced. Modular design can be preferred when the volume of reactor exceeds about 400 m3. 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. Another critical parameter for the uasb reactor performance is the sludge bed porosity. 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. The discrepancies in the initial uasb plants were recorded and now a new breed of uasb reactor is available with respect to the design, operation and maintenance, and materials of construction. Calculation shows that in the prevailing conditions, 1.
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