Biological treatment attachedgrowth processes study guide. The rotating biological contactor consists of a series of plastic discs mounted on a shaft. It consists of a series of closely spaced, parallel discs mounted on a rotating shaft which is supported just above the. The process consists of corrugated plastic media arranged around a horizontal shaft, placed in a tank. Manual of practice mop 8 water environment federation process design manual. Operation of rotating biological contactor study on. Hence there is a board scope for cheaper and compact unit processes or ideal solutions for such issues. Tertiary treatment of wastewater using a rotating biological. Manual recommends that an optimal system should contain at least three. We have supplied robec units to all major uk water authorities, working alongside them to further develop the design to its current form. We offer many services including scheduled maintenance contracts to help ensure that your rotating biological contactor system stays up and running.
Media yang dipakai berupa piring disk tipis berbentuk bulat yang dipasang berjajarjajar dalam suatu poros yang terbuat dari baja. The disadvantages of rotating biological contactors. Use of the rotating biological contactor by rex taicheong. Rotating biological contactors rbcs for wastewater treatment began in the 1970s. Preventative maintenance and proper biomass loading are the two key factors to longevity of rotating biological contactor systems. Performance of rotating biological contactor in wastewater.
The report documents investigation of the applicability of aerobic rotating biological contactor rbc technology for secondary treatment of the wastestream of a facility manufacturing the explosives rdx and hmx. 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. The rotating biological contactor process offers the specific advantages of a biofilm system in treatment of wastewater for removal of soluble organic substances. The rotating biological contactor is a secondary treatment system. The shaft continually rotates at 2 to 8 rpm, and a layer of biological growth 2 to 4 mm thick is soon. Describe how to identify problems in a rotating biological contactor rbc by observation of the media.
Loose biological skin is separated in a following sedimentation basin and then transfered to the sludge treatment. Explain the principals of operation of a trickling filter plant. Kee process final settlement tank model st9 with automatic pump assisted sludge return system and gravity sand filter with backwash capability. During the 1960s, rotating biological contactors rbcs gained popularity as a. Grove gear gear drives are found in crane, material handling, pulp and paper, and a host of additional industries where quality and dependability are paramount. The total suspended solids were reduced from 73 mg2, to 32 mgl and ammonia was completely oxidized to nitrate. The first lesson provides information on the concepts and components of rbc treatment systems. Abstract the management of the medium and small scale industries feel burden to treat waste if the cost involvement is high.
The advantages of using rotating biological contactors rbc in wastewater treatment plants outweigh the disadvantages of installing and operating the system. However we do our best to ensure that this file fig 9. Proceedings of the 1st national symposiumworkshop on rotating biological contactor technology, vol. An rbc contains a number of discs which are arranged along the shaft axis of the contractor. Reaktor kontak biologis putar atau rotating biological contactor disingkat rbc merupakan adaptasi dari proses pengolahan air limbah dengan biakan melekat attached grouwth. 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. 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.
Guidelines for the design, construction, operation, and. Excess biomass is sheared off in the tank, where the rotating action of the disks maintain the solids in suspension. Rotating biological contactor rotating biological contactors use a series of slowrevolving discs which are hosts to a biological film that removes pollutants from wastewater. This technology was designed and specified to provide for the current and future expansion of the community. The synthesized wastestream contained high levels of formaldehyde and formic acid as well as the explosives rdx, hmx, and tnt. Pdf performance study on 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 manufactuer oem. Use of rotating biological contactors for nitrification at the city of guelph water pollution control plant, guelph, ontario, canada. A rotating biological contactor rbc is a successful wastewater microbial treatment system that has been developed. Rotating biological contactor rbc a suspendedfixed growth biological treatment processes used to consume organic matter bod from wastewater. Consists of 24 m diameter disks, closely spaced on a rotating horizontal axis disks are covered with a biofilm.
Hmbr is a combination of rotating biological contactor plus kaldnes media and an external membrane. It provides aerobic treatment of a fixedfilm of biomass. 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. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Describe the operational troubleshooting methods of rotating biological contactors rbcs. Proceedings of the 94 annual meeting and exhibition of the air and waste manage. A rotating biological contactor is a type of secondary treatment process.
The performance of a rotating biological contactor rbc was studied at a loading rate of 0. The rotating biological contactor rbc is a fixed film biological secondary treatment device. The first lesson provides information on the concepts and components of rbc. 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. Rbcs can be used for air stripping and biological degradation of materials found in. The rotating biological contactor process rbc has been used increasingly in europe for the treatment of domestic wastewaters and for some industrial wastes. Kee process managed flow rotating biological contactor rbc model dn19s. The rotating biological contactor used to remove organic waste is an appropriate technology because there exist a universal need for. Rotating biological contactors odor development of white biomass on rotating biological contactor rbc media excessive sloughing of growth excessive breakage of rotating disks or shafts in rbc units shaft, bearing, drive gear, or motor failure solids. Wefasce 1992 design of municipal wastewater treatment plants. Effluent bod characteristics for secondary treatment are comparable to well operated asp. This paper presents the information found in our investigation in a faq format.
Conventional wastewater treatment systems are ageing throughout communities and municipalities and will need to be replaced sooner or later. 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. How does the rotating biological contactor system work. However, the primary manufacturer of rbcs in the united states manufactured. Emphasis was placed on characterizing the anammox organism in this enrichment and on comparing its physiological characteristics to those of candidatusb. Rotating biological contactors for wastewater treatment. Treatment of municipal wastewater by using rotating. Br novatek rotating biological contactor rbc technical design. Material and methods biomass and mineral medium the culture was enriched from biofilm material from a nitrifying. It is wellsuited for secondary andor advanced treatment in municipal or industrial applications. Where a nitrified effluent is required, rbc can be. The shaft is slowly rotated over a tank into which settled. The rbc process involves allowing the wastewater to come in contact with a. Enrichment and characterization of an anammox bacterium.
Rotating biological contactor rbc total water solutions. Rotating biological contractor is one type of treatment system. Schematic of a rotating biological contactor rbc system and in fact all files in the autocad files are current and uptodate. Pdf rotating biological contactors rbcs have been used as an efficient fixed film method of treating wastewater due to its advantages such. Treatment system with rbc can be designed to provide to provide secondary or advanced level of treatment.
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. Rotating biological contactors are an efficient fixedfilm wastewater technology well suited for secondary andor advanced biological treatment. Aeration is provided by the rotating action, which exposes the disks to the air after contacting them with the wastewater. The discs sit within a trough, with approximately 40% of their diameter covered by the liquid. A rotating biological contactor or rbc is a biological treatment process used in the treatment of wastewater following primary treatment. Hochheimer fred wheaton, professor national committee for quality assurance biological resources engineering dept. With the data available, the system can be operated at 2. Rotating biological contactors to provide secondary. The bod5 of domestic wastewater was reduced from 150 mgr to 3 mgn, a reduction of 98%. 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. Design information on rotating biological contactors. Please be aware that this document might not be produced by therefore we can not guarantee the accuracy of the information. Land treatment of municipal wastewater united states environmental protection agency epa 6251810. Upon completion of this lesson you should be able to do the following.
Rotating biological contactor systems have been hit by a number of construction and operating problems, including the failure of the equipment used to treat. Rotating biological contactor sewage treatment reverse. It has been widely used for the secondary treatment of domestic and industrial wastewater. The biological growth that becomes attached to the disks assimilates the organic materials in the wastewater. Use of the rotating biological contactor for appropriate technology.
During the 1970s and early 1980s, the rotating biological contactor process rbc, a particularly efficient fixed film process, became popular. Biological wastewater treatment systems video from headworks bio duration. If the biological process is followed by chemical precipitation, no inter mediate sedimentation is needed as return sludge pumping is not required. Full nitrification is achievable under appropriate process conditions with oxidation rates of up to 6 g m. Performance and operation of a rotating biological.
Grey wastewater was used to study the performance of the modified rotating biological contactor. Operational problems with rotating biological contactors. 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. Biodegradability of oily wastewater using rotating biological. Removal of organic matter has been targeted within organic loading rates of up to 120 g m. 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. United states environmental protection agency research and development water engineering research laboratory cincinnati oh 45268 epa600s286018 apr. The rotating biological contactor rbc process is an efficient fixed film wastewater treatment technology.
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