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