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