It is necessary to select proper range of operating parameters for design, such as, olr, slr, superficial liquid upflow. Uasb reactor design using a physical model abstract hydraulic studie s fullscale are expensive and complex, an alternative design is through the construction and. A similar but variant technology to uasb is the expanded granular sludge bed egsb digester. Uasb reactor design guidelines anaerobic sewage treatment. Although it is a wellestablished process for largescale industrial wastewater treatment. Guideline for granular sludge reactor design lequiaudg. Anaerobic treatment of municipal wastewater in uasbreactors. Upflow anaerobic sludge blanket uasb reactors have been widely used for the treatment of industrial wastewater.
The reactor height was 4 m with an inner diameter of 20 cm. Uasb reactor startup for the treatment of municipal wastewater followed by advanced oxidation process 717 brazilian journal of chemical engineering vol. 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. Kaolin, glucose and distilled water were employed for the production of. Guideline for granular sludge reactor design 10 i 10. An example uasb design calculations spreadsheet is partially shown in the image below. The technology is relatively simple to design and build, but developing the granulated sludge may take several months. Water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. Treatment of municipal wastewater in upflow anaerobic. Since i am responsible as engineer in wastewater treatment package, i need to learn about uasb there is a possibility that this system will be included in the package. Comparisons between the uasb and the egsb reactor seung. Mar 02, 2016 deals with uasb reactors for the primary treatment of sewage, stabilization of sludge and removal of bod. This study employed 9 reactors in total and each uasb reactor had a volume of 1 l with 30 cm height and 8 cm diameter.
Assays were performed on a physical model fm constructed in. 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. It is by far the most widely used highrate anaerobic. Sizing of uasb upflow anaerobic pond for wastewater.
Sludge ages in uasb reactors usually exceed 30 days, leading to stabilization of the excess sludge removed from the system. Different concentrations and upflow velocities were maintained for each operating reactor. Uasb design calculations spreadsheet low cost easy to use. During the running or operational stage of the uasb reactor, the performance of the uasb reactor in the treatment of the artificiallymanufactured wastewater was assessed against the bod 5 and the tss criteria. Uasb reactor is a methaneproducing digester, which uses an anaerobic process and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. Economic analysis of a large uasb reactor producing. Uasb reactors have been shown to operate best at around 7 ph, but can cope with a slightly lower value such as 6.
May 17, 2017 also, the top part of the reactor includes a means for collecting the methane biogas generated by the anaerobic process. Abstract an artificial neural network model of a uasb reactor has been. 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. The uasb reactor has the potential to produce higher quality effluent than septic tanks s.
Treatment of municipal wastewater in upflow anaerobic sludge blanket uasb reactor dr. 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. Design of upflow anaerobic sludge blanketuasb reactor system wang kaijunbeijing municipal research institute of environmental protection, beijin 37,china the purpose of this paper is to discuss the design procedures of uasb system. The usab design is tailor made to suit the wastewater characteristics given in. Factors affecting bod5 and tss removal from wastewater using. Ive ever learnt about anaerobic wastewater treatment, however i dont have any idea about uasb and what the differences are. This ebook is a compilation of information from a well known wiki website, and this it can be given away by those that download this pdf to their hard drives. Models specific to uasb reactors have been developed to describe flow patterns, mixing patterns and effluent characteristics successfully. 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. Anaerobic reactor design there are many new concepts in anaerobic reactor design. Uasb reactors are constructed out of concrete or another watertight material and can be designed in a circular or rectangular way. The upper part of the clarigestor reactor design has a clarifier but no gas cap.
I think this is my first time i learnt about upflow anaerobic sludge blanket uasb. Effect of operational and design parameters on removal. Pdf uasb reactor design using a physical model jhonny. Performance of upflow anaerobic sludge blanket uasb reactor. Critical elements for the design of uasb reactors are the influent distribution system, the gassolids separator, and. The raw wastewater originating from the industrial process requires pretreatment to prepare it for the anaerobic treatment process. Chapter 4 anaerobic sewage treatment using uasb reactors. Guideline for granular sludge reactor design 2 abstract the partial nitritationanammox pathway is an innovative alternative for nitrogen removal from wastewater compared with conventional nitrificationdenitrification over nitrate. Process flow diagram and uasb reactor design dimensions in ram ified otherwise. Uasb reactors have achieved considerable success and these reactors have been applied to treat a wide range of euents such as sugar, pulp and paper, dairy, chemical, potato starch, bean balancing, so drinks, sh processing, noodle processing, yeast production, slaughterhouse, and co ee processing industries. Design of upflow anaerobic sludge blanket uasb reactor. The upflow anaerobic sludge blanket 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. Modular design can be preferred when the volume of reactor exceeds about 400 m3.
Specialized literature is available and covers a broad range of technologies and process options. Determination of design criteria for uasb reactors as a. Critical elements for the design of uasb reactors are the influent distribution system, the gassolids separator, and the effluent withdrawal design. It is a reactor where sludge from and waste is treated at the bottom of reactor. Frederico hermann jr, 345, cep 05489, sao paulo, sp. Waterleau is a pioneer in the field of anaerobic wastewater treatment, offering a complete range of adapted anaerobic reactor. Comparisons between the uasb and the egsb reactor seung j. Uasb reactor design calculation pdf uasb reactor design calculation pdf.
Uasb reactor sswm find tools for sustainable sanitation. The upflow anaerobic sludge blanket uasb reactor has been recognized as an important wastewater treatment technology among anaerobic treatment methods. Pdf design and working of a lab scale uasb reactor for. Pdf uasb reactor design using a physical model jhonny i. The running stage was conducted in a 20 days time period. Design, process layout and description of the biomethanation plant. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total. The merits of anaerobic and aerobic bioreactors are. Apr 24, 2018 waterleau biotim upflow anaerobic sludge blanket reactor uasb. Uasb reactor has been and is the most usual reactor configuration to grow anaerobic granules for cod removal.
Design of an uasb reactor sewage treatment chemical. 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. Gas liquid solids separator glss device in the uasb reactor the main aim. Reactors are usually designed based on rate considerations. Uasb design calculations spreadsheet low cost easy to. 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. Modeling of a uasb reactor by narx networks for biogas. Volumetric hydraulic load and hydraulic retention time the volumetric hydraulic load is the volume of wastewater applied daily to the reactor, per unit of volume. The performance of a uasb react or was assessed by applying various hydraulic retention times. Uasb reactor is a methaneproducing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. Uasb reactor is a methaneproducing digester, which uses an anaerobic process and forming a blanket of granular sludge and. 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. Design criteria one of the most important aspects of the anaerobic process applying uasb reactors is its ability to develop and. The influent distribution system and different distributors were introduced.
Jan 17, 20 sizing of uasb upflow anaerobic pond for wastewater treatment plant january 17, 20 december 18, 2018 rifka aisyah waste water treatment plant i think this is my first time i learnt about upflow anaerobic sludge blanket uasb. Free shipping to and from repair facility the plan was to expand to these markets in the first update. The uasb reactor for this research was pilot and full scale to study effective parameters on the designed with 500 liters volume which was furnished to a uasb reactor with different kinds of effluent like domestic separator system with the ability of separating three. The design principle and methods of pretreatment system and uasb reactor were emphasized. Two commonly used reactors are the cstr continuous stirred tank reactor and the pfr plug flow reactor. Get file genitourinary side effects have included retention. Crosssection of an upflow anaerobic sludge blanket uasb reactor.
Up flow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester which used in wastewater treatment. Factors affecting bod5 and tss removal from wastewater. Treatment of dairy waste water using uasb reactor and. The uasb reactor can be briefly described as a system in which substrate passes first through an expanded sludge bed containing a high. Many modifications and improvements have been developed in uasb reactor to enhance their efficiency. Several investigations were carried out at laboratory, reactor design. The usab design is tailor made to suit the wastewater characteristics given in table 2. Review of upflow anaerobic sludge blanket reactor technology. The characteristics of treated bagasse wash water after uasb reactor was as indicated in the table 3. The reactor design of the plant he was visiting was a. It is a maintenancefree, corrosionfree and rugged process with a straightforward design.
Zamanzadeh 1department of environmental engineering, graduate school of the environment, university of tehran, iran. Upflow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester that used in wastewater treatment. The uasb reactor can be designed as circular or rectangular. Uasb process upflow anaerobic sludge blanket uasb reactor has been successfully used to treat variety of industrial as well as domestic wastewaters. Figure 34 shows a schematic representation of the bioreactor used by harada et al. The uasb reactor contained a jacket to maintain thermostatic conditions i.
Waterleau is a pioneer in the field of anaerobic wastewater treatment, offering a complete range of adapted anaerobic reactor types. Performance of upflow anaerobic sludge blanket uasb. The uasb reactor used for the experimental study had a volume of 140 l, and the operation time was 430 days. 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. Anaerobic reactor design concepts for the treatment of. Various components of a uasb reactor are described and design details are included. Design of uasbr upflow anaerobic sludge blanket reactor. A process model is introduced that allows for optimized design. Professor, department of bioenergy, agricultural engineering college and research institute, tamil nadu agricultural. Two different nutrients were used during the uasb startup period, which was designed to decrease the hydraulic retention time hrt from 48 to. An upflow anaerobic sludge blanket reactor was designed to handle 8,800 liters per. Waterleau biotim upflow anaerobic sludge blanket reactor uasb. 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. A schematic flow diagram of the process is shown here.
Design, process layout and description of the biomethanation plant for treatment of bagasse wash effluent. Design of upflow anaerobic sludge blanketuasb reactor. The discussion focused on concrete structure of uasb reactor, including dimension calculation and determination principle. Optimal design and operation of a uasb reactor for dairy. Anaerobic reactors international water association. They are necessary for the calculation of further process, design and operational parameters e. Hydraulic studies fullscale are expensive and complex, an alternative design is through the construction and calibration a physical model with a prototype, as performed in this study. The reactor design of the plant he was visiting was a clarigestor, which can be viewed as an ancestor to the uasb. The waste water, coming from these products is highly concentrated with b. These reactors provide enough residence time for the reaction to take place with satisfactory conversion.
This research was carried out to study the feasibility of uasb process as a pretreatment alternative for ahwaz sewage treatment. 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. Flow measurements should be part of continuous process control. Upflow anaerobic sludge blanket uasb reactor in wastewater. 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 pharmaceutical industry under study has the main products like penicillin, erythromycin and its derivatives. 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. Upflow anaerobic sludge blanket digestion wikipedia. 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. The sludge bed is a layer of biomass that forms at the bottom of the reactor, and contains granules of a high settling velocity.
Therefore, the actual effluent parameters to the inlet of uasb reactor are as mentioned in table 2. Determination of design criteria for uasb reactors as a wastewater pretreatment system in tropical small communities 1a. Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. The purpose of this paper is to discuss the design procedures of uasb system. Design of an anaerobic digester for wastewater treatment.
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