The primary function of these bioreactors at wwtps is the reduction organic matter. Effluent bod characteristics for secondary treatment are comparable to well operated asp. Use of the rotating biological contactor by rex taicheong. Abstract the management of the medium and small scale industries feel burden to treat waste if the cost involvement is high. The disk continues to rotate, leaving the waste water and moving through the air. It consists of a series of closely spaced, parallel discs mounted on a rotating shaft which is supported just above the. Waste gases are found in all branches of industries.
A rotating biological contactor is a type of secondary treatment process. Rotating biological contactor rbc equipment is frequently used for domestic and mining effluent treatment. Please be aware that this document might not be produced by therefore we can not guarantee the accuracy of the information. Rbc has some advantages, for example the ease in operating, not require large area, some variations of parameter that could be controlled such as the speed of rotation. Rotating biological contactors are an efficient fixedfilm wastewater technology well suited for secondary andor advanced biological treatment. Modified rotating biological contactor 10 disc surface area was 4. Material and methods biomass and mineral medium the culture was enriched from biofilm material from a nitrifying.
Summary of design information on rotating biological. Rbcs may be the best process choice for some wastewater treatment plants because of their proven simplicity, reliable performance, and low energy usage particularly important when considering leed qualification. Schematic representation of a a rotating biological contactor, with approximately 40% submergence, and b a deeper submerged rotating biological contactor. The rotating biological contactors rbcs or simply biodiscs are part of the so called biofilm processes. Rotating biological contactor rbc is being widely used for wastewater treatment but there is an apparent lack of knowledge about the rheological properties of the produced sludge.
Specify the browning solution on your next rbc installation or retrofit. Rotating biological contactor is biological wastewater treatment by using rotated discs which are turned around by axis with the certain speed. Grey wastewater was used to study the performance of the modified rotating biological contactor. Gilbert municipal construction division office of water program operations washington, d.
Pdf nitrification in rotating biological contactors. A rotating biological contactor rbc is a successful wastewater microbial treatment system that has been developed. The reactor consisted of four rotating blades in each stage, having the size of 300 mm x100 mm x. A rotating biological contactor rbc is an attached. Rotating biological contactors are used for wastewater treatment requiring low land area, maintenance, energy or startup costs and can facilitate a more decentralised water treatment network hiras et al. Conventional wastewater treatment systems are ageing throughout communities and municipalities and will need to be replaced sooner or later. Rotating biological contactors rbc are a conventional aerobic biological wastewater treatment unit. Rotating biological contactor rbc the rotating biological contactor is a secondary treatment system. During the 1970s and early 1980s, the rotating biological contactor process rbc, a particularly efficient fixed film process, became popular.
Rotating biological contactor sewage treatment reverse. Loose biological skin is separated in a following sedimentation basin and then transfered to the sludge treatment. Biological phosphorus removal relies on phosphorus uptake by aerobic heterotrophs capable of. Pdf organic loading weight per unit time per volume is useful for the design of rotating biological contactors rbc. Rbcs can be used for air stripping and biological degradation of materials found in wastewater or contaminated groundwater. Use of the rotating biological contactor for appropriate technology wastewater treatment by rex taicheong chan graduate research engineer and michael k. Inadequate primary sedimentation and too little surface area per unit reactor volume contributed to the poor results. The first lesson provides information on the concepts and components of rbc treatment systems. During this time, oxygen is transferred from the air to the slime. Enrichment and characterization of an anammox bacterium. Since the rotating biological contactor process is less susceptible to upset from toxic and hydraulic shock, its applications extend beyond the treatment of typical domestic and industrial wastes. The shaft continually rotates at 2 to 8 rpm, and a layer of biological growth 2 to 4 mm thick is soon established on the wet surface of each disk.
Biodegradability of oily wastewater using rotating biological. The rotating biological contactor process offers the specific advantages of a biofilm system in treatment of wastewater for removal of soluble organic substances and nitrogen compounds. Rotating biological contactor rotating biological contactors, commonly called rbcs, are used in wastewater treatment plants wwtps. If the biological process is followed by chemical precipitation, no inter mediate sedimentation is needed as return sludge pumping is not required. Rotating biological contractors flashcards quizlet. The rotating biological contactor rbc is a fixed film biological secondary treatment device. Manual recommends that an optimal system should contain at least three cells. The rotating biological contactors rbcs or simply biodiscs are part of the socalled biofilm processes. Feb 16, 2017 a rotating biological contactor is a type of secondary treatment process. Rotating biological contactor systems have been hit by a number of construction and operating problems, including the failure of the equipment used to treat. Each reactor usually has several sets of discs arranged in series. Sep 21, 2017 the advantages of using rotating biological contactors rbc in wastewater treatment plants outweigh the disadvantages of installing and operating the system.
Pdf rotating biological contactors rbcs have been used as an efficient fixed film method of treating wastewater due to its advantages such. Preventative maintenance and proper biomass loading are the two key factors to longevity of rotating biological contactor. Rotating biological contactor systems the walker process rotating biological contactor provides a simple and effective method of providing secondary andor advanced wastewater treatment by a natural biological process. It has been widely used for the secondary treatment of domestic and industrial wastewater. Pdf a steadystate model of nitrification and organic carbon oxidation in the rotating biological contactor process is developed and verified. The advantage of all these systems is that they are compact i.
The model predicts the distribution of heterotrophs and. Operational problems with rotating biological contactors. This study conducted to treat the textile industry effluent in effective way using filamentous microbes. Xingxing peng, feng guo, feng ju, tong zhang environmental biotechnology laboratory, department of civil engineering, the university of hong kong sar, china. Rotating biological contactors for wastewater treatment a. The rotating biological contactor process was first used in germany in the 1920s.
Physically, they consist of parallel, deformed discs mounted perpendicularly on a shaft that is slowly rotated in a tank through which the wastewater to be treated is passed. Rotating biological contactor water treatment waste. The advantages of using rotating biological contactors rbc in wastewater treatment plants outweigh the disadvantages of installing and operating the system. Steady rheological properties of rotating biological. Treatment system with rbc can be designed to provide to provide secondary or advanced level of treatment. A rotating biological contactor or rbc is a biological treatment process used in the treatment of wastewater following primary treatment. Design information on rotating biological contactors. Processes are adequate if all design parameters are the same. This twolesson unit on rotating biological contactors rbcs is designed to be used with students who have had some experience in wastewater treatment and a basic understanding of biological treatment. The longterm reliability of this process is evident in the thousands of units in operation for more than 40 years with evoqua as the original equipment manufactuer oem. This fact sheet was prepared to provide information on the types of biological nutrient removal technologies, nutrient. Treatment of municipal wastewater by using rotating.
The results of wastewater the paper prove that the cod removal in rotating biological contactor systems is a function of biofilm the organic loading rate. We have supplied robec units to all major uk water authorities, working alongside them to further develop the design to its current form. Simplified schematic of rotating biological contactor. Performance and operation of a rotating biological contactor. The longterm reliability of this process is evident in the thousands of units in operation for more than 40 years with evoqua as the original equipment manufacturer oem. Denitrifiers in the biofilm in a fullscale rotating biological contactor. It is a unique adaptation of the movingmedium biofilm system which facilitates easy and effective oxygen transfer. An rbc contains a number of discs which are arranged along the shaft axis of the contractor. Rbcs may be the best process choice for some wastewater treatment plants because of their proven simplicity, reliable performance, and low energy usage particularly. Light and electron microscopic studies of microorganisms growing in rotating biological contactor biofilms. The primary treatment process means protection by removal of grit and sand and coarse material through a screening process, followed by a removal process of sediment by settling. A rotating biological contactor or rbc is a biological treatment process used in the treatment of wastewater following primary treatment, which removes. Brenner wastewater research division municipal environmental research laboratory cincinnati, ohio 45268 and walter g. Operation of rotating biological contactor study on.
This is not a forum for general discussion of the articles subject put new text under old text. Br novatek rotating biological contactor rbc technical design. Get a printable copy pdf file of the complete article 5. The shaft is mounted above the water level in the tank. A steadystate model of nitrification and organic carbon oxidation in the rotating biological contactor process is developed and verified. Rotating biological contactors rbcs have been used as an efficient fixed film method of treating wastewater due to its advantages such as low energy and land requirements or. The rotating biological contactor rbc has been used in europe for many years to treat both municipal and industrial waste waters. Rotating biological contactors rbcs have been used as an efficient fixed film method of treating wastewater due to its advantages such as low energy and land requirements or simplicity of operation. The first lesson provides information on the concepts and components of rbc. Rbc are suitable for the treatment of domestic and industrial sewage in small and medium towns.
Jul 06, 2014 trickle filter for aquaponics aquaculture a moving bed bio filter mod duration. Performance and operation of a rotating biological contactor in a tilapia recirculating aquaculture system brian l. Rotating biological contactors rbcs for wastewater treatment began in the 1970s. Hmbr is a combination of rotating biological contactor plus kaldnes media and an external membrane. Click here to start a new topic please sign and date your posts by typing four tildes new to wikipedia. Rotating biological contactors to provide secondary treatment. In the united states, doman 2 worked with an experimental plant in connecticut in 1925. Rotating biological contactors for wastewater treatment. Upon completion of this lesson you should be able to do the following. Miller a fullscale rotating biological contactor rbc sys tem, designed to achieve effluent limitations of 10 mg1 5day biochemical oxygen demand bod5 and 2 mg1 of ammonia nitrogen nh3n for domestic wastewater, performed at less than design expectations. Operation of rotating biological contactor study on sewage.
Epa430984008 summary of design information on rotating biological contactors by james a. The reactor was operated with submergence of 100 % of the disc area and with a rotational speed held constant at 9 revmin. In operation, a media, consisting of a series of circular disks mounted side by side on a common shaft is rotated through the wastewater flow. In parallel, community and commercial development in ecological sensitive areas requires a solution that is adapted to modern lifestyles.
Schematic of a rotating biological contactor rbc system file. However, the primary manufacturer of rbcs in the united states manufactured. Rotating biological contactor rbc process continuousflow process using rbcs with. Rotating biological contactors sswm find tools for. As long as the contents of organic or inorganic substances are below local admissible values the waste gas may be released to the environment without any additional treatment. Rbcs are a fixed film, aerobic, biological wastewater treatment system. This is the talk page for discussing improvements to the rotating biological contactor article. The effects of initial dye concentration and disc rotation speed were studied on the performance of a continuously operated rotating biological contactor rbc reactor in decolourising an azo dye containing synthetic wastewater, employing the statistically planned 2k full factorial design of experiments. Textile wastewater contains contaminants such as suspended and colloidal solids also have starch and dextrin. Performance and operation of a rotating biological. Performance of rotating biological contactor in wastewater. Summary of design information on rotating biological contactors. The rbc process consists of a large disc with radial and concentric passages slowly rotating in a concrete tank.
Rotating biological contractor is one type of treatment system. Conventional biological treatment means activated sludge systems and fixed film systems such as trickling filters, or rbc nolde 1996. The synthetic sago wastewater with a cod value of 1087 mgl at a hydraulic retention time hrt of 42 h. We offer many services including scheduled maintenance contracts to help ensure that your rotating biological contactor system stays up and running. The rotating biological contactor consists of a series of plastic discs mounted on a shaft. Use of rotating biological contactors for nitrification at the city of guelph water pollution control plant, guelph, ontario, canada. Rbcs are fixedfilm reactors similar to bio filters in that organisms are attached to support media.
The widespread use of rotating biological contactors rbc began in europe over four decades ago. Biological treatment rotating biological contractors advanced treatment tertiary treatment. During the rotation, 40 percent of the media surface area is in the wastewater. Operation of rotating biological contactor study on sewage treatment plant. Hochheimer fred wheaton, professor national committee for quality assurance biological resources engineering dept. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Organic loading weight per unit time per volume is useful for the design of rotating biological contactors rbc. Brazil usdaagricultural research service, national center for cool and cold water aquaculture, kearneysville, wv 25430, usa. However, they are basic and can be affected by a change in operational parameters. Rotating biological contactor rbc is a recent device for the biological treatment of sewage.
Rao 2 abstract the rotating biological contactor process offers the specific advantages of a biofilm system in treatment of wastewater for removal of soluble organic substances and nitrogen compounds. It operates on the principle of aerobic attached growth system operated on the moving media. It provides aerobic treatment of a fixedfilm of biomass. Overview wastewater treatment processes in use today may be broadly categorized as either fixed film processes or suspended growth processes. Proceedings of the 1st national symposiumworkshop on rotating biological contactor technology, vol.
The rotating biological contactor process offers the specific advantages of a biofilm system in treatment of wastewater for removal of soluble organic substances. Garden guides the disadvantages of rotating biological. Operational problems with rotating biological contactors john a. Effluent from bioreactor enters the membrane by a centrifugal pump and the sludge remained behind the membrane, which contains microorganisms, is returned to the bioreactor. Removal of organic matter has been targeted within organic loading rates of up to 120 g m. Where a nitrified effluent is required, rbc can be. The disadvantages of rotating biological contactors.
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