Other types of anaerobic digesters, such as attached media filters and sludge blankets, may serve to provide technical and economic benefit in future. The wastewater enters the reactor through a well designed distribution system and is distributed equally over the bottom of the reactor. Treatment of domestic wastewater using upflow anaerobic sludge. Anaerobic treatment of municipal wastewater in uasbreactors. The top of the anaerobic reactor was tightly closed to maintain the stringent anaerobic condition.
Upflow anaerobic sludge blanket reactors for treatment of. Design of an anaerobic digester for wastewater treatment. The merits of anaerobic and aerobic bioreactors are. Upflow anaerobic sludge blanket reactors are designed. The digester consisted of a plastic tank with three rooms. This study investigated the applicability of dynamic membrane filter dmf technology in an upflow anaerobic sludge blanket uasb and dmfcoupled process for the treatment of municipal wastewater. Pdf the upflow anaerobic sludge blanket uasb reactor has found wide acceptance in the treatment of industrial wastewaters since its. In the uasb process, the waste to be treated is introduced in the bottom of the reactor. Chemical oxygen demand to sulphate ratio of the sewage 11. 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.
This acceptance stems from its simplicity, economy and the possibility of energy recovery. Review of upflow anaerobic sludge blanket reactor technology. As the knowledge in the anaerobic treatment field has progressed, some settings such as uasb reactors upflow anaerobic sludge blanket have been wining acceptance in the last few decades in tropical and subtropical countries, unlike the 1980s where these technologies were scarcely used. It has been applied to a wide spectrum of wastewaters on both domestic and industrial scales. Upflow ananerobic sludge blanket uasb the uasbis a wastewater treatment system that uses microorganisms to biologically degrade pollutants. The sludge blanket is comprised of microbial granules.
Treatability studies of dairy wastewater by upflow. Optimizing energy harvest in wastewater treatment by combining anaerobic. Upflow anaerobic sludge blanket reactor codigestion of algae and. In order to expand production capacity, and reduce the impact on the environment, the sharps brewery invested in an upflow anaerobic sludge blanket, uasb waste water treatment plant.
The advantages of this system include the ability to keep large amount of the biomass intended for degradation and the production of biogas. Treatment of municipal wastewater in upflow anaerobic sludge blanket uasb reactor dr. Water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k. List of upflow anaerobic sludge blanket companies, manufacturers and suppliers. In this study, a relatively highrate treatment hydraulic retention time. Sewage treatment in a combined upflow anaerobic sludge. There was the main room, the second room and the gassolid separator or crosssection room.
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. In water treatment many plants have been built and operated purely for water treatment purposes. This work evaluates the theoretical availability of energy and the sludge production in a wastewater treatment plant wwtp that associates uasb reactors and. Uasb anaerobic treatment plant, sharps brewery nijhuis. Bhattacharyya, sludge blanket height and flow pattern in uasb reactors. Treatment of municipal wastewater in upflow anaerobic. The upflow anaerobic sludge blanket uasb reactor has been recognized as an important wastewater treatment technology among anaerobic treatment methods. Anaerobic sludge blanket reactors global water pathogen. But, unfortunately, this type of ad treatment can only handle quite low contamination levels in effluents, but with the. The hrt influences the cod reduction and is an important parameter with respect to the desired degradation rate. The lucas anaerobic technology is typically applied as a first. What are the disadvantages and failings of uasb upflow. Upflow sludge blanket filtration usbf water online.
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. Central leather research institute, adyar, chennai. The state of the art for upflow anaerobic sludge blanket uasb reactors is discussed, focusing on the microbiology of immobilized anaerobic bacteria and the mechanism of granule formation. Chapter 4 anaerobic sewage treatment using uasb reactors edx. Uasb is a hybrid type of reactor, involving both suspended and attached growth process. 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 comparison supports uasb as a suitable option on the basis of. Upflow anaerobic filter af uasb reactor anaerobic hybrid ah reactor. Modelling of an upflow anaerobic sludge blanket reactor r.
The over all experimental setups were given in fig 1. The upflow anaerobic sludge blanket uasb reactor has been recognized as an important. What are the disadvantages and failings of uasb upflow anaerobic sludge blanket wastewater treatment system. The results showed that biological removal efficiency of nitrogen and preservation of. Innovative anaerobic upflow sludge blanket filtration. Duplicate, 34l, uasb reactors initially received an organic loading. The temperature, strength, biodegradability and components of sewage were suitable for anaerobic digestion, and thus, upflow anaerobic sludge blanket reactor uasb was selected for its treatment. Wastewater enters the anoxic compartment of the bioreactor where it mixes with activated sludge recycled from the bottom of the sludge filter. Performance of upflow anaerobic sludge blanket uasb. Anaerobic pretreatment of domestic sewage using uasb reactor systems offers a. Upflow anaerobic sludge blanket reactor uasb in the upflow anaerobic sludge blanket reactor uasb process, the whole waste is passed through the anaerobic reactor in an upflow mode, with a hydraulic retention time hrt of only about 810 hours at average flow. Web based training 2005 what is anaerobic biodegradation. Lucas anaerobic is the brand name for an anaerobic waste water treatment system which uses upflow anaerobic sludge blanket, upflow anaerobic contact, anaerobic filtration and hybrid anaerobic filtration technologies for treating waste water depending on specific requirement. This video shows an uasb reactor tipically designed.
They are considered sludge blanket reactors because the influent wastewater receives treatment by passing through flocculent or granular. Upflow anaerobic sludge blanket reactor an overview. Upflow anaerobic sludge blanket reactor uasb is a type of high rate. Download this upflow anaerobic sludge blanket process ebook and keep it on your hard drive for later reference. Upflow anaerobic sludge blanket reactor view presentation slides online. Upflow anaerobic sludge blanket uasb test rig youtube. Raw water and chemicals are hydraulically mixed then pass upward through the various zones within the basin for reaction, flocculation, sludge removal and. The hydrodynamic characteristics of upflow anaerobic sludge blanket uasb reactors were investigated in this study. A similar but variant technology to uasb is the expanded granular sludge bed egsb digester. Modeling of processes is helpful in making design decisions, and therefore the various modeling techniques applied to uasb reactors have also. The anaerobic reactor is a upflow anaerobic sludge blanket reactor uasb. The upflow anaerobic sludge blanket process uasb has been around for many years, so it clearly can work well. The main purpose of the project in designing the upflow anaerobic sludge blanket uasb is to control and monitor the wastewater concentration in mit by minimizing the high concentrations of pollutant such as biological oxygen demand bod and other.
It is also claimed to be ideal for use in water reclamation, industrial wastewater treatment and existing plants retrofits 5, 6. Performance of twostage upflow anaerobic sludge blanket. Pdf treatment of domestic wastewater using upflow anaerobic. Pdf proposed design of upflow anaerobic sludge blanket. The upflow velocity should not exceed an upper limit in order to prevent sludge washout, both out of the sludge blanket and out of the 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. The spiracone clarifier is an upflow sludge blanket clarifier that combines mixing, flocculation and sedimentation in a single basin. It is a maintenancefree, corrosionfree and rugged process with a straightforward design. Anaerobic digestion can be utilized to convert industrial wastewater into clean water and energy. The two 2l lab upflow anaerobic sludge blanket reactors were operated at a constant hydraulic retention time of 12 h with a gradual stepwise increase in phenol concentration from 105 to 1,260 mg. Upflow sludge blanket filtration usbf operation of a usbf plant is simple and selfregulating. Biological treatment of wastewater basically reduces the pollutant concentration through microbial coagulation and removal of nonsettleable organic colloidal solids. Modelling of an upflow anaerobic sludge blanket reactor. Granular sludge formation in upflow anaerobic sludge.
The anaerobic digestion of sludge using the upflow anaerobic sludge blanket uasb process has been used for water treatment for many years. 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. Combining upflow anaerobic sludge blanket uasb reactors and. Upflow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester that used in wastewater treatment. Wastewater enters the reactor from the bottom, and flows upward. Upflow sludge blanket filtration usbf which is a new modification of activated sludge is considered as an outstanding technology for municipal wastewater treatment. 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. This study involves the treatment of dairy industry wastewater by uasb reactor by varying the retention times in days for a particular organic loading rate. Among anaerobic technologies, the most popular ones is the upflow anaerobic sludge blanket uasb. Dairy wastewater is generally characterized by its relatively high temperature and variation in organic content. Upflow anaerobic sludge blanket digestion wikipedia. The upflow anaerobic sludge blanket reactor uasb is a single tank process. Nowadays, the technology is being increasingly used for the benefits of the methane it produces. Therefore, anaerobic treatment is considered the appropriate choice 57.
The usab design is tailor made to suit the wastewater characteristics given in table 2. The upflow anaerobic sludge blanket uasb reactor has found wide acceptance in the treatment of industrial wastewaters since its development in the netherlands. The anaerobic contact reactor upflow anaerobic sludge blanket uasb reactor, anaerobic filter, and fluidized bed reactor are mostly employed for effluent of the pulp and paper mills. Treatment of a combined dairy and domestic wastewater in. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it. National environment engineering research institute neeri, nehru marg, nagpur 440 020, india. Recently, an up flow anaerobic sludge blanket uasb reactor has been successfully employed for treatment of dairy wastewater in fullscale applications 8.
Abstractthe upflow anaerobic sludge blanket uasb reactor has found. Anaerobic treatment is very common in wastewater treatment plants in developing countries. The biothane uasb upflow anaerobic sludge blanket technology is a proven and reliable process, exclusively owned by biothane. They can also recover methane, which can be managed to produce energy. Increase in nutrient levels during the anaerobic treatment of wastewater is a common occurrence and is attributed to the mineralization of organic compounds hanndel and lettinga, 1994. Pdf this paper presents the findings of the study on treatment of domestic wastewater using. The objective of study was to create digester reactor design by using the upflow anaerobic sludge blanket uasb technology for manure handling to produce householdscale biogas.
The wastewater flows upward through a sludge blanket composed of biologically formed granules or particles. Applicability of upflow anaerobic sludge blanket and. Treatment of domestic wastewater using upflow anaerobic. Applicability of upflow anaerobic sludge blanket uasb. Manonmaniam sundaranar university, sri paramakalyani centre for environmental sciences, alwarkurichi 627 412, tamil nadu, india. Hydrodynamics of upflow anaerobic sludge blanket reactors. This blend of algae and acetate was used in the feedstock applied to the uasb reactors. This reactor type is very well suited for wastewater. In moderate climate countries, sewage treatment in an up flow anaerobic sludge blanket uasb reactor has recently increased since the uasb configuration started to be efficiently applied for this purpose in the beginning of the 1980s.
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