Design of upflow anaerobic sludge blanket uasb reactor for jam industry. Table 10 3 results of the design procedure for a uasbb reactor with a retention. Pressurised water procedure for unblocking inlet pipes. Upflow anaerobic sludge blanket uasb technology, normally termed as uasb reactor, is a form of anaerobic digester for wastewater treatment.
A process model is introduced that allows for optimized design. Uasb design calculations spreadsheet low cost easy to. Write the mole balances in terms of conversion for a batch reactor, cstr, pfr, and pbr. Comparisons between the uasb and the egsb reactor seung. 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. Optimal design and operation of a uasb reactor for dairy. Feb 02, 2017 in most of the monitoring, the uasb reactor operated with a mean ph of 7. 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. 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. Flow measurements should be part of continuous process control. Design of upflow anaerobic sludge blanketuasb reactor. The influent distribution system and different distributors were introduced.
Uasb reactor design calculation pdf uasb reactor design calculation pdf. Anaerobic sludge blanket uasb reactor in tropical and low and moderate temperature countries has been presented. Process flow diagram and uasb reactor design dimensions in ram ified otherwise. It can be estimated the concentration of solids using the following equation. Description download design and calculation uasb reactor for sludge treatment comments. It is a maintenancefree, corrosionfree and rugged process with a straightforward design. Determination of design criteria for uasb reactors as a. It is by far the most widely used highrate anaerobic. Mar 02, 2016 deals with uasb reactors for the primary treatment of sewage, stabilization of sludge and removal of bod.
The design of uasb reactors is very simple and does not require the. Also, the top part of the reactor includes a means for collecting the methane biogas generated by the anaerobic process. 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. Specialized literature is available and covers a broad range of technologies and process options. Reactors jordan university of science and technology.
Thus, the lowermost 30 to 50 percent uasblike portion of the reactor volume is. Provision for gas collection was made on the top of. Uasb reactor composite tww 4 l was fed into uasb reactor daily. 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.
Chapter 4 anaerobic sewage treatment using uasb reactors. 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 similar but variant technology to uasb is the expanded granular sludge bed egsb digester. Economic analysis of a large uasb reactor producing biogas. 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. The olr to be used for design of uasb reactor for different temperature is provided by lettinga and hulshoff. This reactor will produce most of its power from thorium, with no external input of uranium 233, in the equilibrium cycle. Uasb reactor is based on the socalled threephase separator, which enables the reactor to separate gas, water and sludge mixtures under high turbulence conditions. Chapter 4 anaerobic sewage treatment using uasb reactors edx. 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. Report design and calculation uasb reactor for sludge treatment please fill this form, we will try to respond as soon as possible. The design principle and methods of pretreatment system and uasb reactor were emphasized. Calculation shows that in the prevailing conditions, 1. Another critical parameter for the uasb reactor performance is the sludge bed porosity.
They are necessary for the calculation of further process, design and operational parameters e. Separation of inflow to each uasb cell, ventilation, sampling and excess sludge systems not shown, for clarity. The procedure was adopted to get the average value of the required. Also note that liquid level inside level will be below overflow weir by a height gas pressure 0. Anaerobic reactor design there are many new concepts in anaerobic reactor design. 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. The reactor has multiple gas hoods for the separation of biogas.
Design of baffle in upflow anaeorobic engineering essay. 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. Economic analysis of a large uasb reactor producing. The characteristics of treated bagasse wash water after uasb reactor was as indicated in the table 3. Cutlip department of chemical engineering university of connecticut storrs, ct, usa. Free shipping to and from repair facility the plan was to expand to these markets in the first update. In order to monitor the granularity of anaerobic sludge, the determination of the granule size distribution is of vital importance. The uasb reactor can be designed as circular or rectangular. A pilot scale study was set up to investigate the principle design parameters of up flow anaerobic sludge blanket uasb reactors for treating. The raw wastewater originating from the industrial process requires pretreatment to prepare it for the anaerobic treatment process. 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.
A schematic flow diagram of the process is shown here. May 17, 2017 an example uasb design calculations spreadsheet is partially shown in the image below. Pdf optimal design and operation of a uasb reactor for dairy. Deals with uasb reactors for the primary treatment of sewage, stabilization of sludge and removal of bod. 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. Effect of recirculation rate on anaerobic treatment of. Since spring 2017, the aguaclara upflow anaerobic sludge blanket uasb team has been working on a detailed design for a pilotscale, gravitypowered uasb reactor. Startup of uasb reactors treating municipal wastewater. Upflow anaerobic sludge blanket digestion wikipedia. For an ideal cstr reactor, the residence time required for the reaction is given by. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total. Various components of a uasb reactor are described and design details are included.
Generally, there are two ways to design uasb reactor which are based on hrt or olr. A uasb reactor treats wastewater anaerobically and produces biogas as a by. Comparisons between the uasb and the egsb reactor seung j. Uasb reactor was exposed to various hrts including 10, 8, 6, 4, and 2 h. Separation between the biogas, sludge and wastewater, 2. 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. 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. In general, for temperature between 15 and 35 degrees c, the reactor can be designed for loading between 1. 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. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane.
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. Treatment of municipal wastewater in upflow anaerobic. Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. Get file genitourinary side effects have included retention. Pdf proposed design of upflow anaerobic sludge blanket. The discussion focused on concrete structure of uasb reactor, including dimension calculation and determination principle. Design of upflow anaerobic sludge blanket uasb reactor. 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. Anaerobic digestion has been applied increasingly over the last decades for sewage treatment, especially in regions with a warm climate. 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. Pdf design and calculation uasb reactor for sludge.
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. Modifications to uasb such as uasb ponds, anaerobic baffle reactors, migrating blanket reactors are also described here. The purpose of this paper is to discuss the design procedures of uasb system. In the past three decades the uasb reactor design has been more or less. Reactor design within excel enabled by rigorous physical. Uasb design calculations spreadsheet archives low cost. 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. Along with tww, lfs from lr was also introduced into uasb reactor. An example uasb design calculations spreadsheet is partially shown in the image below. Modular design can be preferred when the volume of reactor exceeds about 400 m3. Anaerobic treatment of municipal wastewater in uasbreactors. Aug, 2006 the olr to be used for design of uasb reactor for different temperature is provided by lettinga and hulshoff. They are necessary for the calculation of further process, design and operational.
By nina blahut, shania fang, emily liu, kanha matai march 15, 2019. Article pdf available in environmental engineering and management journal 55. 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. The uasb reactor is a methanogenic methaneproducing digester that evolved from the anaerobic clarigester. Anaerobic pretreatment of domestic sewage using uasb reactor systems offers a number of advantages, e. 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. The upflow anaerobic sludge blanket uasb process is a frequently applied method in the biological treatment of industrial effluents. 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. Proposed design of upflow anaerobic sludge blanket uasb for mapua institute of technology project by. Frederico hermann jr, 345, cep 05489, sao paulo, sp. 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.
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. Therefore, the actual effluent parameters to the inlet of uasb reactor are as mentioned in table 2. Inoculum total solids ts, 54 gl and volatile solids vs, 27 gl for uasb reactor was obtained from pilot plant capacity, 12. Design of uasbr upflow anaerobic sludge blanket reactor. 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. Design and calculation uasb reactor for sludge treatment scribd. Pdf optimal design and operation of a planned fullscale uasb reactor at a dairy farm. 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. Once the kinetics is known, the reactor design can be made based on material balance. Conversion and reactor sizing define conversion and space time. Design of an anaerobic digester for wastewater treatment. Most of the models proposed in the literature are for steady state conditions in the reactor.
1597 1633 220 946 1050 1407 931 8 49 1372 1150 244 1185 1176 916 1521 478 44 1138 954 821 1441 739 1524 1039 366 1165 149 1014 1294 1537 101 780 981 18 497 997 1342 1148 37 1341