The upflow anaerobic sludge blanket uasb reactor has been recognized as an important wastewater treatment technology among anaerobic treatment methods. Treatment of domestic wastewater using upflow anaerobic sludge blanket reactor 1j. This acceptance stems from its simplicity, economy and the possibility of energy recovery. The methods for determination of excess sludge from the idea cells is by measuring the. Anaerobic sludge blanket reactors global water pathogen. Abstract experiments were performed in parallel using six identical uasb up. The sludge is quite thick 510% ds, is stable and can be pumped to the drying beds with the aerobic sludge. An upflow anaerobic sludge blanket reactor uasb was invented by lettinga at early 1980s, commonly used in various anaerobic treatment techniques. This kind of reactor is called hybrid upflow anaerobic sludge blanket huasb and is considered more stable for. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total. The contents presented in this paper focuses on the performance of uasb upflow anaerobic sludge blanket reactor for treating various industrial and domestic wastewaters at various operating conditions.
Granular sludge formation in upflow anaerobic sludge blanket. Therefore, the ability of a hybrid anaerobic baffled reactor, treating desizing wastewater, to achieve a prompt startup was studied at labscale. Anaerobic treatment of lowstrength wastewaters at ambient. Uasb is an immobilized system adopted in biohydrogen production due to its. The wastewater enters the reactor through a well designed distribution system and is distributed equally over the bottom of the reactor. H college of engineering and technology, bijapur, karnataka,india. Anaerobic treatment of municipal wastewater in upflow anaerobic. Upflow anaerobic sludge blanket uasb reactor in wastewater. It has been applied to a wide spectrum of wastewaters on both domestic and industrial scales. A comparison of upflow anaerobic sludge bed usab and the anaerobic biofilm fluidized bed reactor abfbr for the treatment of municipal wastewater epa grant number. Jun 24, 2017 anaerobic treatment is very common in wastewater treatment plants in developing countries. Mar 27, 2014 the use of up flow anaerobic sludge blanket anaerobic digestion systems. Apr 10, 2014 one of the more interesting new processes is the up flow anaerobic sludge blanket process uasb, which was developed by lettinga and his co workers in holland in the early 1970s anaerobic granular sludge bed technology refers to a special kind of reactor concept for the high rate anaerobic treatment of wastewater. Rapid urbanization and industrialization in the developing countries like india are facing severe problems in collection, treatment and disposal of.
Use of up flow anaerobic sludge blanket anaerobic digestion. This video shows an uasb reactor tipically designed for wastewater treatment plants where it is possible. Anaerobic treatment is very common in wastewater treatment plants in developing countries. The anaerobic digestion of sludge using the upflow anaerobic sludge blanket uasb process has been used for water treatment for many years. A comparison of upflow anaerobic sludge bed usab and the. The use of up flow anaerobic sludge blanket anaerobic digestion systems. Kinetics of dairy waste water treatment using anaerobic sludge blanket reactor system. However, for optimal performance, the biomass must be in a granular form. Uasb can attain high biomass concentration because of its ability to reduce biomass washout. Biotim uasb upflow anaerobic sludge blanket technology 40 years of pioneering. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane. The sludge blanket is comprised of microbial granules 1 to 3 mm in diameter, i.
Review of upflow anaerobic sludge blanket reactor technology. Buy now available at a lower price from other sellers that may not offer free prime shipping. Central leather research institute, adyar, chennai. Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. The anaerobicupflow sludge blanket filtration technique was developed by adding an anaerobic reactor to. In water treatment many plants have been built and operated purely for water treatment purposes. Nowadays, the technology is being increasingly used for the benefits of the methane it produces. Performance of upflow anaerobic bioelectrochemical reactor. The raw wastewater originating from the industrial process requires pretreatment to prepare it for the anaerobic treatment process. Wastewater enters the reactor from the bottom, and flows upward. The upflow anaerobic sludge blanket reactor is an effective highrate process for wastewater treatment. The upflow anaerobic sludge blanket uasb reactor has found wide acceptance in the treatment of industrial wastewaters since its development in the netherlands. Operation performance and granule characterization of upflow anaerobic sludge blanket uasb reactor treating wastewater with starch as the sole carbon source. The anaerobic reactor is a upflow anaerobic sludge blanket reactor uasb.
Upflow anaerobic sludge blanket uasb reactors, expanded granular sludge bed egsb reactors and anaerobic baffled reactors abrs are considered highrate anaerobic process reactors that are designed to remove organic matter measured as biochemical oxygen demand bod or chemical oxygen demand cod and recover methane. Comparison of sulfatereducing and conventional anammox. The goal of this project was to set up labscale anaerobic digesters to collect data that will be used to develop and validate a predictive monitoring and controls solution to improve digester performance. Abstract the hydrodynamic characteristics of upflow anaerobic sludge blanket uasb reactors were investigated in this study. The results showed that biological removal efficiency of nitrogen and preservation of. Anaerobic sludge blanket reactors global water pathogen project. But, unfortunately, this type of ad treatment can only handle quite low contamination levels in effluents, but with the right effluent the gas yield provides a very useful income to offset the cost of running the process. The usab design is tailor made to suit the wastewater characteristics given in. This paper discusses the ecological and chemical composition of sludges from several.
Water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. Upflow anaerobic sludge blanket uasb reactors and anaerobic baffled reactors abrs are sanitation technologies that are designed to remove organic matter measured as bod or cod. Upflow anaerobic sludge blanket reactors for treatment of. Modelling of an upflow anaerobic sludge blanket reactor. They can also recover methane, which can be managed to produce energy. The top of the anaerobic reactor was tightly closed to maintain the stringent anaerobic condition. This would help realize the advantages of both fixed film and up flow sludge blanket treatment. The anaerobicupflow sludge blanket filtration technique was developed by adding an anaerobic reactor to its influent. Celebrating 40 years anaerobic sludge bed reactors for. Yeom 1civil and environmental engineering centre for zero emission technology sung kyun kwan university, korea 2centre for environmental studies ces anna university, chennai 600025 tamilnadu, india int. Treatment of domestic wastewater using upflow anaerobic.
This favours the formation of granules and well settling flocs. Excess sludge is withdrawn from the bottom of the reactor. The fundamentals of anaerobic treatment are presented in detail, including its applicability, microbiology, biochemistry and main reactor configurations. 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 significant difficulty in hybrid anaerobic baffled reactor operation is the slow startup procedure, which is crucial to the overall polyvinyl alcoholcontaining desizing wastewater treatment.
The over all experimental setups were given in fig 1. Abstract the state of the art for upflow anaerobic sludge blanket uasb reactors is discussed, focusing on the microbiology of immobilized. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it the sludge blanket is comprised of microbial granules 1 to 3 mm in diameter, i. Treatment of municipal wastewater in upflow anaerobic sludge. Uasb model rodriguez gomez, raul antonio, moreno, luis on. Operation performance and granule characterization of upflow. It also praised for its short hrt and higher treatment efficiency 7375. The issue of residues and industrial effluents represents an unprecedented environmental challenge in terms of recovery, storage, and treatment.
Upflow anaerobic sludge blanket uasb reactor in wwtp. This work discusses the perspectives of treating effluents through anaerobic digestion as well as reporting the experience of using an upflow anaerobic sludge blanket uasb reactor as biorefinery annex in a pulp and paper industrial plant to be. A similar but variant technology to uasb is the expanded granular sludge bed egsb digester. Uasb reactor is a methaneproducing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. One of these reactors is the upflow anaerobic sludge blanket uasb reactor. Inverted anaerobic sludge blanket reactor for the treatment of wastewater biofatrecovery biofatrecovery concerns the market introduction of the inverted anaerobic sludge blanket iasb reactor for direct anaerobic treatment of industrial wastewater containing fat.
In the uasb reactor the stabilization of organic matter occurs in two reaction zones, namely in bed and sludge blanket. Upflow anaerobic sludge blanket digestion wikipedia. This video shows an uasb reactor tipically designed. Systems 1, 69 the upflow anaerobic sludge blanket reactor uasb is a single tank process. One of the more interesting new processes is the up flow anaerobic sludge blanket process uasb, which was developed by lettinga and his co workers in holland in the early 1970s anaerobic granular sludge bed technology refers to a special kind of reactor concept for the high rate anaerobic treatment of wastewater. The anaerobic upflow sludge blanket filtration technique was developed by adding an anaerobic reactor to its influent and operated by varying the main process parameters in. Abstract, the upflow anaerobic sludge blanket uasb is essentially. The most evaluated was the upflow anaerobic reactor with sludge blanket uasb, at one stage, two stages and hybrid with fixed bed at the top, followed by anaerobic reactors of fixed bed with ascending and descending flow, as described in table 1. This reactor type is very well suited for wastewater.
Celebrating 40 years anaerobic sludge bed reactors for industrial wastewater treatment. Attempts to cultivate a stable sludge consisting predominantly of methanosarcina sp. In the anaerobic milieu of the reactor, the methane is formed due to. Anaerobic treatment of municipal wastewater in uasbreactors. Granular sludge formation in upflow anaerobic sludge blanket uasb reactors. Lit 9977 pdf, 532kb, 2 pages this file may not be suitable for users of assistive technology. Operating the reactor in batch mode the dynamic transformation of tetrachloroethene, trichloroethene and dichloroethene dce was monitored. Upflow anaerobic sludge blanket uasb reactor in wwtp youtube.
The performance of upflow anaerobic bioelectrochemical reactor uabe, equipped with electrodes anode and cathode inside the upflow anaerobic reactor, was compared to that of upflow anaerobic sludge blanket uasb reactor for the treatment of acidic distillery wastewater. The upflow anaerobic sludge bed reactor uasb was devel oped in the netherlands in the early seventies lettinga et al. Operation performance and granule characterization of. The wastewater passes up through a sludge blanket where the anaerobic bacteria are brought into close contact with the wastewater. Inverted anaerobic sludge blanket reactor for the treatment. Operation performance and granule characterization of upflow anaerobic sludge blanket uasb reactor treating wastewater with starch as the sole carbon source author links open overlay panel xueqin lu a guangyin zhen b adriana ledezma estrada a mo chen c jialing ni a toshimasa hojo a kengo kubota a yuyou li a c. Methanogenesis in an upflow anaerobic sludge blanket reactor at. Anaerobic digesters and up flow anaerobic sludge blanket. Application of uasb reactor in industrial wastewater. 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. Treatment of sugar industry wastewater by upflow anaerobic.
Transformation of tetrachloroethene in an upflow anaerobic. It is a maintenancefree, corrosionfree and rugged process with a straightforward design. Uasb reactor introduced by 4 has become a popular highrate anaerobic treatment system throughout the world 5. Anaerobic digestion can be utilized to convert industrial wastewater into clean water and energy. Hydrodynamics of upflow anaerobic sludge blanket reactors. Granular sludge formation in upflow anaerobic sludge. The upflow anaerobic sludge blanket process uasb has been around for many years, so it clearly can work well. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it. Raw waste is fed into the lagoon through a number of inlets spread over the lagoon base. The anaerobicupflow sludge blanket filtration technique was developed by adding an anaerobic reactor to its influent and operated by varying the main process parameters in order to gain the optimum conditions.
The merits of anaerobic and aerobic bioreactors are. In the anaerobic milieu of the reactor, the methane is formed due to bacterial activity during the fermentation. They are considered sludge blanket reactors because the influent wastewater receives treatment by passing through flocculent. Abstract reductive dechlorination of tetrachloroethene was studied in a mesophilic upflow anaerobic sludge blanket reactor. Compared with the upflow anaerobic sludge blanket uasb reactor, the removal efficiencies of total chemical oxygen demand cod and suspended solids ss of the asf reactor were higher than 90%. Two reactor types are analysed in more detail, namely anaerobic filters and especially uasb upflow anaerobic sludge blanket reactors.
Upflow anaerobic sludge blanket reactor an overview. Hybrid anaerobic baffled reactor for treatment of desizing. Innovative anaerobic upflow sludge blanket filtration. Treatment of domestic wastewater using upflow anaerobic sludge. As this is a small amount, it is undertaken twice yearly. Adjusting the sulfate concentration to give codtosulfate ratios to 2. In this research, a novel laboratory scale anaerobicupflow sludge blanket filtration combined bioreactor was designed and operated to improve the efficiency of the upflow sludge blanket filtration process for the simultaneous removal of phosphorus and nitrogen from wastewater. Anaerobic granulation in upflow anaerobic sludge blanket uasb reactors has been well studied for the last three decades and applied successfully in many industries lettinga et al. In the journal article 11, the hybrid up flow anaerobic sludge blanket huasb reactor is a new concept which is the hybridized version of an uasb reactor with a random packing media at the top of the reactor. Hydrodynamics of upflow anaerobic sludge blanket reactors ren. Determination of kinetic parameters of an upflow anaerobic sludge.
Up flow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester which used in wastewater treatment. The hydrodynamic characteristics of upflow anaerobic sludge blanket uasb reactors were investigated in this study. Design of an anaerobic digester for wastewater treatment. This paper discusses the ecological and chemical composition of sludges from several different reactors in relation to granule formation. Most of these full scale reactors are used for trea ting agroindustrial wastewat er, but its application for. The usab design is tailor made to suit the wastewater characteristics given in table 2. In this study, the technical feasibility of using an upflow anaerobic sludge blanket uasb reactor to treat lowstrength wastewater at ambient. Within the sludge bed, the organic matter in the sewage is reduced by bacteria. T upflow anaerobic sludge blanket reactor uasb applicable. The upflow anaerobic sludge blanket reactor uasb is a single tank process.
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