Up flow anaerobic sludge blanket reactor uasb about anaerobic wastewater. Municipal solid waste responses to requests for information pdf. Granular sludge bed processes in anaerobic digestion of particle. Operation performance and granule characterization of. The results showed that biological removal efficiency of nitrogen and preservation of. Upflow anaerobic sludge blankethollow centered packed bed. Kandasamy encyclopedia of life support systemseolss can be traced to the processing of industrial chemicals and nearly 40% of the total.
Methanogenic anaerobic digestion of wastewater microbewiki. The usab design is tailor made to suit the wastewater characteristics given in. Upflow anaerobic sludge blankethollow centered packed bed uasbhcpb reactor was developed with the aim to minimize operational problems in the anaerobic treatment of palm oil mill effluent pome under thermophilic conditions. The process is essentially based on a special flow regime allowing the sewage to get into contact with a sludge blanket or sludge bed situated in the reactor, and a. Anaerobic upflow anaerobic sludge blanket uasb taersa. Easy sludge blanket levels the sludge blanket level can be measured by setting the units to mgl, gl or percent. The anaerobic reactor is a upflow anaerobic sludge blanket reactor uasb. 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. R1 had sludge blanket, and r2 and r3 had half supporter of bamboo and coconut fiber, respectively. A similar but variant technology to uasb is the expanded granular sludge bed egsb digester. Operation performance and granule characterization of upflow anaerobic sludge blanket uasb reactor treating wastewater with starch as the sole carbon source.
As this is a small amount, it is undertaken twice yearly. This article is from iranian journal of public health, volume 39. Abstractbackground a new biological domestic wastewater treatment process, which has been. Calibrate the instrument and then slowly lower the sensor into the clarifier. 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.
Methanogenesis in an upflow anaerobic sludge blanket. Schematic of an upflow anaerobic sludge blanket reactor uasb. Anaerobic treatment of municipal wastewater in uasbreactors. However, the long startup period required for the development of. An upflow anaerobic sludge blanket reactor uasb was invented by lettinga at early 1980s, commonly used in various anaerobic treatment techniques. 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.
In upflow anaerobic sludge blanket reactors, sludge retention time is increased by a. Upflow anaerobic sludge blanket how is upflow anaerobic. The history of the iasb reactor started with the realization that anaerobic sludge could produce. Nowadays, the technology is being increasingly used for the benefits of the methane it produces. Some of the gas produced within the sludge blanket becomes attached to the biological granules huishoff pol et al. The over all experimental setups were given in fig 1. Performance evaluation of upflow anaerobic sludge blanket reactor. This technology has numerous advantages, such as low energy requirement, energy recovery as methane gas ch 4, low costs of aeration and sludge handling, over aerobic counterparts. Uasb reactor is a methaneproducing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. Modelling raul rodriguez gomez licentiate thesis in chemical engineering department of chemical engineering and technology school of chemical science and engineering royal institute of technology stockholm, sweden tritache report 2011. Lit 9977 pdf, 532kb, 2 pages this file may not be suitable for users of assistive technology. The suspended solids concentration will significantly increase as it reaches the sludge blanket level. The raw wastewater originating from the industrial process requires pretreatment to prepare it for the anaerobic treatment process. Hydrodynamics of upflow anaerobic sludge blanket reactors.
The upflow anaerobic sludge blanket process uasb has been around for many years, so it clearly can work well. 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. 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. Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. Mechanisms and models for anaerobic granulation in upflow. Treatment of domestic wastewater using upflow anaerobic. Hydrothane stp uasb upflow anaerobic sludge blanket process system by hydrothane stp bv. Anaerobic digestion can be utilized to convert industrial wastewater into clean water and energy. Up flow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester which used in wastewater treatment. Stateoftheart of anaerobic digestion technology for.
Treatment of domestic wastewater using upflow anaerobic sludge blanket reactor 1j. The anaerobic digestion of sludge using the upflow anaerobic sludge blanket uasb process has been used for water treatment for many years. 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. Anaerobic sludge blanket reactors global water pathogen. The issue of residues and industrial effluents represents an unprecedented environmental challenge in terms of recovery, storage, and treatment. Excess sludge is withdrawn from the bottom of the reactor. Upflow anaerobic sludge blanket uasb reactor in wwtp. Design of an anaerobic digester for wastewater treatment. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane.
Anaerobic wastewater treatment is a wellestablished and proven technology for the treatment of various categories of industrial wastewaters. Anaerobic upflow anaerobic sludge blanket uasb a great amount of industries such as food, beverage, agribusiness, meat processing, pulp and paper, are characterised for generating effluents with high biodegradable organic loads high bod and flow. In this study it was evaluated the startup procedures of anaerobic treatment system with three horizontal anaerobic reactors r1, r2 and r3, installed in series, with volume of 1. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it. Uasbreactors upflow anaerobic sludge blanket are used in brazil. 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.
A lower mixing will prevail in the sludge bed in systems operated at low temperatures, as the solubility of gases increases at declining temperatures. Upflow anaerobic sludge blanket digestion wikipedia. The upflow anaerobic sludge blanket uasb reactor has found wide acceptance in the treatment of industrial wastewaters since its development in the netherlands. One of these reactors is the upflow anaerobic sludge blanket uasb reactor. 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. Currently, the upflow anaerobic sludge blanket uasb reac tor is the most widely used reactor for the treatment of vinasse obtained from the. The anaerobicupflow sludge blanket filtration technique was developed by adding an anaerobic reactor to. Upflow anaerobic sludge blanket how is upflow anaerobic sludge blanket abbreviated. The sludge is quite thick 510% ds, is stable and can be pumped to the drying beds with the aerobic sludge. Seed sludge the seeding inoculum was the sludge taken from the anaerobic digester of a local sewage treatment plant. Pdf operation performance and granule characterization. This process allows a sludge blanket to form and act as a filter and catalyst providing intimate contact between raw water, treatment chemicals and previously formed precipitates. Uasb can attain high biomass concentration because of its ability to reduce biomass washout.
Pdf design of upflow anaerobic sludge blanket uasb. The methods for determination of excess sludge from the idea cells is. Formation of highly settleable sludge aggregates combined with gas separation and sludge settling, e. 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. Krishnamurthy 1 1department of biotechnology, pesit, bsk iii stage, bangalore, india 2department of chemical, rvce, r. The uasb reactor consists of a single vessel, where wastewater enters from the bottom and flows upward into the sludge granules, which filters out organic material, and results in the production of biogas and clarified effluent fig. National environment engineering research institute neeri, nehru marg, nagpur 440 020, india.
The wastewater enters the reactor through a well designed distribution system and is distributed equally over the bottom of the reactor. The upflow anaerobic sludge blanket reactor was operated at. Modelling of an upflow anaerobic sludge blanket reactor. Uasb is an immobilized system adopted in biohydrogen production due to its. Flow range is 175gpm to 5,000gpm for a single unit. The hydrodynamic characteristics of upflow anaerobic sludge blanket uasb reactors were investigated in this study.
The hydrothane stp uasb upflow anaerobic sludge blanket process is the most commonly applied anaerobic technology for the biological treatment of industria. It is a maintenance free, corrosion free and rugged process with a straightforward design. Upflow sludge blanket filtration usbf which is a new modification of activated sludge is considered as an outstanding technology for municipal wastewater treatment. Wastewater enters the reactor from the bottom, and flows upward. The use of up flow anaerobic sludge blanket anaerobic digestion systems. The characteristics of inoculum are summarized in table 2.
It is also claimed to be ideal for use in water reclamation, industrial wastewater treatment and existing plants retrofits 5, 6. 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. Vidyanikethan post, mysore road, bangalore, india abstract. Innovative anaerobic upflow sludge blanket filtration. Anaerobic treatment of lowstrength wastewaters at ambient. Article information, pdf download for performance evaluation of upflow.
Anaerobic treatment is very common in wastewater treatment plants in developing countries. Upflow anaerobic sludge blanket uasb reactors have been widely used for the treatment of industrial wastewater. Upflow anaerobic sludge blanket reactor an overview. An upflow anaerobic sludge blanket reactor was designed to handle 8,800 liters per. Upflow anaerobic sludge blanket reactors for treatment of. It also praised for its short hrt and higher treatment efficiency 7375.
This paper presents the findings of the study on treatment of domestic wastewater using a laboratory scale hybrid upflow anaerobic sludge blanket huasb reactor. In water treatment many plants have been built and operated purely for water treatment purposes. Upflow anaerobic sludge blanket uasb reactor has been employed in industrial and municipal wastewater treatment for decades. This reactor type is very well suited for wastewater. Wastewater enters the reactor from the bottom and flows upward. This video shows an uasb reactor tipically designed. This favours the formation of granules and well settling flocs.
Upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a. Biomethane production from vinasse in upflow anaerobic sludge. 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. Upflow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester that used in wastewater treatment. Biological treatment of wastewater basically reduces the pollutant concentration through microbial coagulation and removal of nonsettleable organic colloidal solids. While the cod removal varied from 7586%, the bod removal was in. Central leather research institute, adyar, chennai. Systems 1, 69 the upflow anaerobic sludge blanket reactor uasb is a single tank process. An adjustable hopper is utilized to collect sludge for periodic blow down. The top of the anaerobic reactor was tightly closed to maintain the stringent anaerobic condition.
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