This paper provides a framework within which a process engineer can design an anaerobic baffled reactor for the treatment of a specific domestic wastewater. The increased contact time with the active biomass sludge results in improved treatment. Hybrid anaerobic baffled reactor for treatment of desizing. In this study, as a further step in the development of a generic bioprocess, we evaluated the ability of methanotrophic bacteria to grow andor survive in uasb reactors. Unique baffled design enables abr to reduce biomass washout, hence retain a high active biomass content. The reactor recovered from shock loads after shutdowns of 1 week. The results also provide evidence to modify the design. The lower and upper part of the reactor behaves like the uasb and fbr, respectively. Pdf development of anaerobic reactor for industrial wastewater. The ahr was reported to remove sulfate and metal more efficiently than uasb and fbr steed et al.
The complex gsl separator is replaced by simple baffles to guide the flow of waste water. Aspects covered are bioavailability, biodegradability, microbial population, thermodynamics, kinetics involved and bioreactor design for pta wastewater treatment. An anaerobic sequencing batch reactor asbr is a highrate liquid digestion system that retains microflora in the reactor by sequentially feeding influent, mixing the reactor, settling solids, and decanting effluent from the top of the reactor figure 1. Investigating the treatability of a compost leachate in a. C in an up flow anaerobic reactor no gls operated at up flow velocities of 3. A schematic diagram of the hybrid anaerobic model reactor is given in fig 1. Professor, department of bioenergy, agricultural engineering college and research institute, tamil nadu agricultural.
A hybrid reactor that capitalizes on the positive features of anaerobic filteraf and upflow anaerobic sludge blanket uasb. A bioprocess in which a hybrid aerobicanaerobic sludge reactor is used has been designed recently in our laboratory. Monitoring methanotrophic bacteria in hybrid anaerobic. The successful operation of anaerobic reactor depends on maintaining the.
Developed by mccarty and coworkers at stanford university, the abr was described as a series of upflow anaerobic sludge blanket reactors uasbs because it is divided into several compartments 3, 5, 16. Stateoftheart of anaerobic digestion technology for. The model was made run under varying operating conditions, viz, influent flow rate 2. Characteristics, process parameters, and inner components. Simplification of the original design of the uasb reactor decreases the construction as well as maintenance costs. The abr configuration allows for a naturally occurring spatial separation of. Performance of upflow anaerobic sludge blanket uasb. Alternative design of wastewater treatment plant with.
Treatability studies on hybrid upflow anaerobic sludge. Anaerobic reactors international water association. Substrate removal kinetics of an anaerobic hybrid reactor. The upper 20 cm of the reactor was operated with fixed bed of corrugated plastic sheet with 170 m2m3 specific surface areas. Much of the fermentation used industrially to produce food and drink products, as well as home fermentation, uses anaerobic digestion. Adi hybrid reactor a highrate system that combines two proven anaerobic processes. Upflow hybrid anaerobic filter reactors or hafs typically operate at foodtomicroorganism fm ratios between 0. A promising technology for treatment of distillery spent wash. Reactor cstr a complete mix tankstyle reactor for very high solids and fog digestion. The hybrid reactor design combines 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. An anaerobic baffled reactor abr is an improved 879septic tank with a series of baffles under which the noecompendiumgrey, black or the industrial noecompendiumwastewater is forced to flownoecompendium under and offer the baffles from the inlet to the outletnoecompendium.
The hybrid design of the anaerobic reactor prevented the biomass from washing out but gas clogging in the packing material was also observed. In the present study, a threelayer artificial neural network ann and nonlinear regression models were developed to predict the performance of biogas production from the anaerobic hybrid reactor ahr. The paper provides a critical comparison between mesophilic and thermophilic anaerobic treatment of pta wastewater through diagnosis of a case study. In the past three decades the uasb reactor design has been more or less. The anaerobic treatment of wastewater does not consume energy but can even produce energy through methane generation. There are plenty of equations to assess and design the large scale industrial bio reactors.
Design of upflow anaerobic sludge blanket uasb reactor for jam industry wastes m. The hybrid design of the anaerobic reactor prevented the biomass from washingout but gas. The use of anaerobic reactor began in 1859 with the first anaerobic digester that was built by. Anaerobic baffled reactor anaerobic baffled reactor abr consists of a number of uasb reactors connected in series. The basic hypothesis of this study is that anaerobic granular sludge and aerobic bio. Since the earlier anaerobic treatment systems, the design concepts were improved from classic reactors like septic tanks and anaerobic ponds, to modern high rate reactor configurations like anaerobic filters, uasb, egsb, fixed film fluidized bed and expanded bed reactors, and others. Thus, the lowermost 30 to 50 percent uasblike portion of the reactor volume is responsible for flocculant andor granular sludge. Anaerobic reactor design concepts for the treatment of. However, it appears to be a novel idea to integrate anaerobic and aerobic processes for the e cient removal of metformin and other pharmaceutical constituents. Interest in anaerobic processes emerged 1015 years later due to the increase in energy costs. Stateoftheart of anaerobic digestion technology for industrial wastewater treatment k. Comparative study of thermophilic and mesophilic anaerobic.
The anaerobic baffled reactor was able to biologically achieve enhanced primary. This development was an obvious evolution, as it combined the strong process at. Advancements in anaerobic sequencing batch reactor asbr. Chapter 4 anaerobic sewage treatment using uasb reactors. The hybrid systems the hybrid anaerobic reactor the hybrid reactor is a combination of the uasb upflow anaerobic sludge bed and the uff upflow fixed film reactors. The design criteria for the abr were taken as 4h retention. Prediction of biogas production rate from anaerobic hybrid. The process is used for industrial or domestic purposes to manage waste or to produce fuels. In this paper, anaerobic reactors are evaluated considering the historical evolution and types of wastewaters.
Polyurethane trickling filter in combination with anaerobic hybrid reactor for treatment of tomato industry wastewater 359 fixation, samples were rinsed three times in 0. One type of highrate reactor is the anaerobic baffled reactor abr. Startup of an anaerobic hybrid uasbfilter reactor treating. Egsb expanded granular sludge bed anaerobic ic james c. The top third of the reactor 10 cm was filled with polypropylene spherical beads.
The results of the case study suggests that one stage thermophilic anaerobic. Low temperature treatment of domestic sewage in upflow anaerobic sludge blanket and anaerobic hybrid reactors. Anaerobic treat ment by a hybr id reactor article pdf available in environmental engineering science 193. The hybrid design of the anaerobic reactor prevented the biomass from washingout but gas clogging in the packing material was also observed. Advancements in anaerobic sequencing batch reactor asbr design.
However, both designs suffer from some of the operational difficulties such as clogging, channeling, and poor or no. In abr, wastewater passes over and under the staggered vertical baffles as it flows from inlet to outlet. Advantages of the hybrid anaerobic reactor design include. Chapter 4 anaerobic sewage treatment using uasb reactors edx. Hybrid reactor system for wastewater treatment application and approach of modelling article in international journal of environment and pollution 212 january 2004 with 4 reads. Continuous process design model simulation for the. The improved labscale hybrid anaerobic baffled reactor proved to be an efficient reactor configuration for the treatment of desizing wastewater, which favored the prompt startup of hybrid anaerobic baffled reactor. Substrate removal kinetics for anaerobic hybrid reactor ahr. Sanitary biogas systems are efficient, hygienic and ecologically sound wastewater treatment.
Chapter 16 anaerobic wastewater treatment tu delft. This was obtained so as to make the design of continuous stirred tank reactor cstr that would be used for the anaerobic digestion of vegetable oil wastewater vow possible. Maxham and wakamia in 1985 proposed a modification to the anaerobic hybrid filter ahf using a packing medium occupying a variable volume from 10% to 50%, of the laboratory reactor. Alternative design of wastewater treatment plant with anaerobic baffled reactor and anaerobic filter for romokalisari flats surabaya agastya mahatyanta and mohammad razif department of environmental engineering, faculty of civil engineering and planning, institut teknologi sepuluh nopember, surabaya 60111, indonesia. A model for dewats is developed in nepal with anaerobic baf. 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.
Anaerobic digestion is a sequence of processes by which microorganisms break down biodegradable material in the absence of oxygen. This reactor combines an upflow sludge bed region suspended biomass with an af region fixed biomass. Characterization of the biomass of a hybrid anaerobic reactor har. Anaerobic baffled reactor abr is a series of simplified uasb reactors. Refer to figure 1 and 2 for a schematic of an uasbs and an abr.
The present study evaluates the performance of hybrid anaerobic reactor under different seasons, viz, rainy and winter for treating dairy effluent. Review anaerobic reactor design concepts for the treatment of domestic wastewater adrianus van haandel1, mario t. The two major advantages of anaerobic wastewater treatment, which explain its progress. Uasbaf able to retain very high concentration of active biomass in the reactor. Pdf a laboratoryscale study was conducted to investigate the performance of anaerobic. The results also provide evidence to modify the design of anaerobic baffled reactor to improve reactor performance. The upper 50 to 70 percent of the reactor is filled with crossflow plastic media and behaves as an anaerobic filter. Introduction in the technical design for anaerobic treatment systems. With this design, the reactor is hybrid, once it combines and takes advantage of the properties of the upflow af and of the uasb young and yang, 1998. Design, construction and operation can significantly contribute towards a responsible expansion of the anaerobic technology in the world. A promising technology for treatment of distillery spent wash article pdf available in international journal of environment and pollution 43123.
Introduction in the technical design for anaerobic. Low rate anaerobic reactors high rate anaerobic reactors anaerobic pond biogas septic tank standard rate. Among the anaerobic filters, the hybrid anaerobic reactors har have the. The hybrid anaerobic reactor was assessed with a pilot model 8 litres for the treatment of dairy effluent. It was developed at stanford university by mc carty and co workers. The usab design is tailor made to suit the wastewater characteristics given in. Performance of an anaerobic baffled reactor and hybrid constructed wetland treating highstrength wastewater in nepal a model for dewats. The discussion report of the session dedicated to reactor design is focused on sludge bed reactors and on.
The anaerobic reactor ahr is a combination of the uasb and fbr. Treatment of sago wastewater using hybrid anaerobic reactor. Simulation of a mathematical model for the design of steadystate continuous reactors required for the anaerobic digestion of wastewaters was carried out. Anaerobic baffled reactors abrs have a simple design, decouple hydraulic and solid retention time and provide excellent retention of solids in response to load variations. 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. The book is a valuable tool for engineers, constructors, operators, wastewater utility managers, as well as for students interested in anaerobic processes for sewage. Stateoftheart of anaerobic digestion technology for industrial. Design of an anaerobic digester for wastewater treatment.
567 569 1167 1168 209 708 1406 1011 790 1012 592 568 265 1555 932 154 383 655 122 114 781 356 736 930 25 241 145 224 196 1353 1159 1036 363 1171 1061 1573 1182 326 332 687 875 825 230 607 542 236 98 1031 564