The discs sit within a trough, with approximately 40% of their diameter covered by the liquid. Comparison of suspended growth and attached growth. I d ont see why a university or college would not allow you to take environmental engineering after completing an undergrad in environmental science. In its simplest form, a rotating biological contactor rbc consists of parallel circular disks attached perpendicular to a horizontal shaft which passes through their centers. Rotating biological contactor a rotating biological contactor or rbc is a biological treatment process used in the treatment of wastewater following primary treatment. Protozoa of a rotating biological contactor treatment plant in mexico. This study conducted to treat the textile industry effluent in effective way using filamentous microbes.
Performance and operation of a rotating biological contactor. As the discs rotate, waste water is retained on the bacterial layer and subjected to oxidative conditions via air contact, breaking down both organic and inorganic materials, depending on the bacterial species present on. Rotating biological contractors flashcards quizlet. Its modular and innovative design provides the benefit of reliability, durability and low energy and operating costs. The biological treatment attached growth processes study guide was the result of a collaborative effort of yearlong monthly meetings of wastewater operators, trainers, consultants, the wisconsin wastewater operator association wwoa, and the wisconsin department of. The rotating biological contactor process offers the specific advantages of a biofilm system in treatment of wastewater for removal of soluble organic substances. Rotating biological contactors are an efficient fixedfilm wastewater technology well suited for secondary andor advanced biological treatment. Biological wastewater treatment india water portal. The entire assembly is placed into a tank with the shaft slightly above the surface of the liquid so. Biological treatment attachedgrowth processes study guide. Effluent bod characteristics for secondary treatment are comparable to well operated asp. Aeration is provided by the rotating action, which exposes the disks to the air after contacting them with the wastewater. Hochheimer fred wheaton, professor national committee for quality assurance biological resources engineering dept. 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.
The primary treatment process removes the grit and other solids through a screening process followed by a period of settlement. Treatment of sewage by using two stage rotating biological. Operation of rotating biological contactor study on sewage. Keywords biodegradation, biofilm, cyanidation, denitrification, nitrification, rotating biological contactor rbc, suspended sludge system introduction.
In parallel, community and commercial development in ecological sensitive areas requires a solution that is adapted to modern lifestyles. A rotating biological contactor rbc is a successful wastewater microbial treatment system that has been developed. The walker process rotating biological contactor consists of a multitude of plastic media sheets in bundles. Excess biomass is sheared off in the tank, where the rotating action of the disks maintain the solids in suspension. Rotating biological contactors are an efficient fixedfilm wastewater technology for secondary andor advanced biological treatment. Rotating biological contactor rbc equipment is frequently used for domestic and mining effluent treatment. The rotating biological contactor rbc technology has been in use for several years for the treatment of municipal and industrial wastewater. Abstract the management of the medium and small scale industries feel burden to treat waste if the cost involvement is high. Treatment system with rbc can be designed to provide to provide secondary or advanced level of treatment. A document summarizing design information for rotating biological contactors rbc was developed to provide indepth data on the critical features of this process and the key factors affecting its operation and performance. The disadvantages of rotating biological contactors. The primary treatment process removes the grit and other. Sep 21, 2017 the advantages of using rotating biological contactors rbc in wastewater treatment plants outweigh the disadvantages of installing and operating the system. This study evaluates the application of rbc technology for the removal of ammonia from mining industry effluents.
Use of a rotating biological contactor for removal of. Pdf rotating biological contactors rbcs constitute a very unique and superior. 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. However, the primary manufacturer of rbcs in the united states manufactured. Rotating biological contactors for wastewater treatment a. The reactor consisted of four rotating blades in each stage, having the size of 300 mm x100 mm x. Design information on rotating biological contactors. Rotating biological contactors to provide secondary treatment. During the 1960s, rotating biological contactors rbcs gained popularity as a.
The valencia water authorities tested various packaged plants. In this study, kinetics of biological carbon, nitrogen, and phosphorous removal from a synthetic wastewater in an integrated rotating biological contactor activated sludge system was investigated. Proceedings of the 1st national symposiumworkshop on rotating biological contactor technology, vol. The biological growth that becomes attached to the disks assimilates the organic materials in the wastewater. However, compared to biological removal of phosphorus, chemical processes have higher operating costs, produce more sludge, and result in added chemicals in sludge metcalf and eddy, 2003. United states environmental protection agency research and development water engineering research laboratory cincinnati oh 45268 epa600s286018 apr. Manual recommends that an optimal system should contain at least three. As the discs turn, the microorganisms on them repeatedly contact both air and the organic substances in the water. Pdf rotating biological contactors rbcs have been used as an efficient fixed film method of treating wastewater due to its advantages such. Biological processes like rotating biological contactor rbc pathan et al. Where a nitrified effluent is required, rbc can be used to provide combined. During the 1970s and early 1980s, the rotating biological contactor process rbc, a particularly efficient fixed film process, became popular.
A rotating biological contactor rbc is a successful wastewater microbial. Pdf preliminary study of greywater treatment through. In the biozone, slowly rotating contactor discs treat the effluent by means of biological oxidation, the treated liquid then flows into the final settlement zone. Ensuring effluent standards by improving the design of rotating biological contactors d. The combination of aerobic biological process with physical filtration and disinfection is considered to be the most. Rotating biological contactors development of rotating biological contactors rbcs were evolved from trickling filters and influenced by the need to reduce power consumption for wastewater treatment. 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. High strength slaughter wastewater treatment in a novel. Alinejad institute of water and energy, sharif university of technology p. Rcbr reactors represent an evolution of rotating biological contactors plants. Proceedings of the 94 annual meeting and exhibition of the air and waste manage.
Consists of 24 m diameter disks, closely spaced on a rotating horizontal axis disks are covered with a biofilm. The main advantage of this technology is its simple operating principle, low energy demand and mechanical durability. In contrast, systems in which microorganisms are sustained in a liquid are known as suspendedgrowth processes. Operation of rotating biological contactor study on. Applicability tfs enable organic material in the wastewater to be. The vacuum formed plastic media sheets are assembled in a manner which provides intricate flow paths with maximum effective.
A rotating biological contactor rbc is a successful wastewater. Jan 24, 2008 rotating biological contactors rbcs constitute a very unique and superior alternative for biodegradable matter and nitrogen removal on account of their feasibility, simplicity of design and operation, short startup, low land area requirement, low energy consumption, low operating and maintenance cost and treatment efficiency. It is a unique adaptation of the movingmedium biofilm system which facilitates easy and effective oxygen transfer. Performance and operation of a rotating biological. Bannister school of engineering, cranfield university, cranfield, u. Rotating biological contactor rotating biological contactors use a series of slowrevolving discs which are hosts to a biological film that removes pollutants from wastewater. Rotating biological contactors rbcs consist of vertically arranged, plastic media on a horizontal, rotating shaft. 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. Information and downloadcenter catalogs, brochures. These bundles are mounted on a shaft by means of a simple, internal radial structure.
The biomasscoated media are alternately exposed to wastewater and atmospheric oxygen as the shaft slowly rotates at 11. Findlay g e 1993 the selection and design of rotating biological contactors and reed beds for small sewage treatment plants proc. Operation of rotating biological contactor study on sewage treatment plant. Use of rotating biological contactors for nitrification at the city of guelph water pollution control plant, guelph, ontario, canada. Products introduction the rotating biological contactor has gained great trust for its superior durability and wastewater purification function, and has made us a leading manufacturer. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Performance of rotating biological contactor in wastewater.
High strength slaughter wastewater treatment in a novel combined system of hybrid rotating biological contactor and biological aerated filter. Biological wastewater treatment systems video from headworks bio duration. Rotating biological contactor rbc a suspendedfixed growth biological treatment processes used to consume organic matter bod from wastewater. Feb 16, 2017 a rotating biological contactor or rbc is a biological treatment process used in the treatment of wastewater following primary treatment. Treatment of municipal wastewater by using rotating. The rotating biological contactor rotofix is an aerobic biological treatment system that uses semisubmerged fixed cultures without the use of traditional blowers. Schematic representation of a a rotating biological contactor, with approximately 40% submer gence, and b a deeper submerged rotating biological contactor. Brazil usdaagricultural research service, national center for cool and cold water aquaculture, kearneysville, wv 25430, usa abstract this paper describes the performance characteristics of an industrialscale airdriven rotating biological contactor rbc. Hence there is a board scope for cheaper and compact unit processes or ideal solutions for such issues. In the early twentieth century, rbc concepts emerged and expanded. Grey wastewater was used to study the performance of the modified rotating biological contactor. The rotating biological contactor rbc is a fixed film biological secondary treatment device.
Rbcs can be used for air stripping and biological degradation of materials found in wastewater or contaminated groundwater. The plant also has to merge aesthetically into the surroundings, with low noise and power requirement, and is robust and reliable without the need for extensive maintenance. The rotating biological contactor consists of a series of plastic discs mounted on a shaft. Rotating biological contactors for wastewater treatment cranfield. This thesis is a study of the rotating biological contactor. The 1960s and 1970s saw major rbc plant growth, but this growth became stymied by. Feb 05, 2015 the rotating biological contactor rbc is an aerobic biological treatment system based on bioabsorption principle 5. Rotating biological contactors are large discs on rotating shafts that are mounted in wastewater tanks, but only partly submerged.
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. It has been widely used for the secondary treatment of domestic and industrial wastewater. A rotating biological contactor rbc is an attached. Removal of organic matter has been targeted within organic loading rates of up to 120 g m. Fort kamehameha wastewater treatment plant, pearl harbor, hawaii gordon l. School of engineering, cranfield university, cranfield, u.
Rbc rotating biological contactor and sbr sequencing batch contactor. 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. These systems are known as attachedgrowth processes. The rotating cell biofilm reactor rcbr is a new type of biological process based on biofilm active sludge used in wastewaters treatment. Secondary wastewater treatment linkedin slideshare. Rotating biological contactor systems have been hit by a number of construction and operating problems, including the failure of the equipment used to treat wastewater, the environmental. With the data available, the system can be operated at 2 rpm with an influent flow rate of 1 lmin.
Rotating biological contactor r bc contact time in rbc to determine optimum contact time, 500 ml of various adsorbate concentrations 10 to 50 mgl reactive blue her, reactive yellow he4r bdsa and reactive red he3b were taken in the rbc tank. Rotating biological contractor is one type of treatment system. The shaft continually rotates at 2 to 8 rpm, and a layer of biological growth 2 to 4 mm thick is soon. Rotating biological contactors rbcs for wastewater treatment began in the 1970s. Pdf organic loading weight per unit time per volume is useful for the design of rotating. Rotating biological contactor biofilm method wastewater. It has been widely used for the secondary treatment of domestic and. The rbc process involves allowing the wastewater to come in contact with a. In the final settlement zone any humus sludge or scum that forms as part of the natural biological process is removed by means of an automated recirculation pump system and returned. As the preferred recommended onsite machining company by rbc services, we have traveled to many states. Rotating biological contactors rbc are attached growth biological reactors with a series of closely spaced circular disks made of plastic media mounted on a rotating horizontal shaft.
Rotating biological contactor rbc the rotating biological contactor is a secondary treatment system. This paper presents a conceptualized combined storm and wastewater treatment system for typical low income, high density drainage catchment similar to the case. Schedule n rotating biological contactor permit application department of natural resources government form in iowa. It provides aerobic treatment of a fixedfilm of biomass. Textile wastewater contains contaminants such as suspended and colloidal solids also have starch and dextrin. An rbc contains a number of discs which are arranged along the shaft axis of the contractor.
The circular plates with immobilized fungal mycelium. Rotating biological contactor sewage treatment reverse. The rotating discs on which microorganisms grow is partially submerged typically 40% in. In the past 30 years of company development, we have improved our techniques and have continued to upgrade our products. Rotating biological contactor the discs sit within a trough, with approximately 40% of their diameter covered by the liquid. Activated sludge reactors and rotating biological contactors have demonstrated that both. Operational problems with rotating biological contactors.
1272 849 633 858 257 930 895 198 933 556 318 920 1019 859 1480 774 924 39 1397 568 943 802 343 840 1073 225 260 1412 988 487 1059 969 638 524 982 1459 1021 160 1263 941 1121 748 474 508