In parallel, community and commercial development in ecological sensitive areas requires a solution that is adapted to modern lifestyles. It consists of a series of closely spaced, parallel discs mounted on a rotating shaft which is supported just above the. The rotating biological contactor rbc process is an efficient fixed film wastewater treatment technology. Grey wastewater was used to study the performance of the modified rotating biological contactor. 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. Various design criteria have been set for rotating biological contactor rbc for treating urinal wastewater. Rotating biological contactor sewage treatment reverse. 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. Rbcs can be used for air stripping and biological degradation of materials found in. It is wellsuited for secondary andor advanced treatment in municipal or industrial applications.
These systems are known as attachedgrowth processes. This technology involves allowing wastewater to come in contact with a biological medium in order to facilitate the removal of contaminants. Secondary wastewater treatment linkedin slideshare. Class ii biological safety cabinets nuaire class ii, type a2 biological safety cabinets offer personnel, product, and environmental protection to obtain optimum control over product quality while reducing the potential for exposure of both product and personnel to airborne biological or particulate chemical agents in low to moderate riskhazard research and drug preparation or. The longterm reliability of this process is evident in the thousands of units. The rotating biological contactor rbc has been used in europe for many years to treat both municipal and industrial waste waters. Treatment of sewage by partially submerged three stage. It is an aerobic biological treatment system that uses semisubmerged fixed cultures. Proceedings of the 94 annual meeting and exhibition of the air and waste manage. Rotating biological contactors to provide secondary. Constant quality treatment providing phosphorus removal and disinfection options for sensitive environments.
The primary treatment process removes the grit and other solids through a screening process followed by a period of settlement. Rbcs can be used for air stripping and biological degradation of materials found in wastewater or contaminated groundwater. Performance and operation of a rotating biological contactor. The rotating biological contactor rbc is a fixed film biological secondary treatment device. Performance of rotating biological contactor in wastewater. Rotating biological contactor rbc a suspendedfixed growth biological treatment processes used to consume organic matter bod from wastewater. Proceedings of the 1st national symposiumworkshop on rotating biological contactor technology, vol.
The microorganisms in a rotating biological contactor. 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. Operational monitoring of a rotating biological contactor system, costley s c, wallis f m. During the 1970s and early 1980s, the rotating biological contactor process rbc, a particularly efficient fixed film process, became popular. Rotating biological contactors rbcs serves as a superior alternative for biodegradable material, bod removal rate and cod removal, less area requirement, less energy consumption, with very short startup, with low cost of operating, less maintenance cost and treatment. The rotating biological contactor is a secondary treatment system. Rotating biological contactors for wastewater treatment a. A rotating biological extended contactor sciencedirect. Where a nitrified effluent is required, rbc can be. Rotating biological contactor energy expenses are controlled and well below that of alternate solutions.
Treatment system with rbc can be designed to provide to provide secondary or advanced level of treatment. In the primary settlement zone settles gross solids into sludge, the supernatant liquor then passes forwards into the biozone. This is in contradiction to other published work, but nonetheless useful to know. Review paper on study of rotating biological contactor for. So, week 6 we discussed about the aerobic systems in the activated sludge process rotating biological contactor, and treating of filter those kind of stuff. Processes, activated sludge process and its modifications, attached growth aerobic processes, tricking filters and rotating biological contactors, anaerobic treatment, suspended and attached growth, fluidized bed, sludge blanket systems, nitrification, denitrification, phosphorus removal. 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. Use of rotating biological contactors for nitrification at the city of guelph water pollution control plant, guelph, ontario, canada. Hence there is a board scope for cheaper and compact unit processes or ideal solutions for such issues. So, the in the week 7, we did talk about the anaerobic biological treatment.
No 3445 faculty of biotechnology and genetic engineering, sylhet agricultural university,sylhet3100 2. The unpredicted loss of mechanical integrity results. This report documents the design process, the building and testing phase of this reactor. A three stage lab scale rbc reactor was fabricated using acrylic sheet noncorrosive, nonreactive of 3mm thickness and the inner dimension of individual tank is 20. The rotating biological contactor has gained great trust for its superior durability and wastewater purification function, and has made us a leading manufacturer. Treatment of municipal wastewater by using rotating. It is a unique adaptation of the movingmedium biofilm system which facilitates easy and effective oxygen transfer. 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. Rotating biological contactors rbcs for wastewater treatment began in the 1970s. In the week 7 we discuss the other type of biological treatment which takes place in anaerobic conditions. Mar 27, 2015 rotating biological contactor a rotating biological contactor or rbc is a biological treatment process used in the treatment of wastewater following primary treatment. The system was operated at different organic loading rates olrs and hydraulic retntion times hrts in order to optimize the rbc performance.
School of engineering, cranfield university, cranfield, u. Design information on rotating biological contactors. A rotating biological contactor rbc is a successful wastewater microbial treatment system that has been developed. Rotating biological contactor systems have been hit by a number of construction and operating problems, including the failure of the equipment used to treat. The disk continues to rotate, leaving the waste water and moving through the air. Each stage is made up of one preassembled rotor inside a small basin. Sep 21, 2017 the advantages of using rotating biological contactors rbc in wastewater treatment plants outweigh the disadvantages of installing and operating the system. We have supplied robec units to all major uk water authorities, working alongside them to further develop the design to its current form. Abstract the management of the medium and small scale industries feel burden to treat waste if the cost involvement is high. 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. Fort kamehameha wastewater treatment plant, pearl harbor, hawaii gordon l. We offer many services including scheduled maintenance contracts to help ensure that your rotating biological contactor system stays up and running. Tricking filters and rotating biological contactors.
Applicability tfs enable organic material in the wastewater to be. Rotating biological contractor is one type of treatment system. The advantage of all these systems is that they are compact i. Design criteria for a rotating biological contactor system for. Rotating biological contactor water treatment waste water. The biological growth that becomes attached to the disks assimilates the organic materials in the wastewater. Full nitrification is achievable under appropriate process conditions with oxidation rates of up to 6 g m. 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. Consists of 24 m diameter disks, closely spaced on a rotating horizontal axis disks are covered with a biofilm. Preventative maintenance and proper biomass loading are the two key factors to longevity of rotating biological contactor systems. Ammonia nitrogen removal in stepfeed rotating biological.
In contrast, systems in which microorganisms are sustained in a liquid are known as suspendedgrowth processes. Tricking filters and rotating biological contactors anaerobic treatment. Rotating biological contactors rbc, also called rotating biological filters, are fixedbed reactors consisting of stacks of rotating disks mounted on a horizontal shaft. Operational problems with rotating biological contactors. Treatment of sewage by partially submerged three stage rotating biological contactor rbc jayamala m.
In this article, we firstly describe the operation, benefits and drawbacks. The disadvantages of rotating biological contactors. Feb 16, 2017 a rotating biological contactor is a type of secondary treatment process. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Overview wastewater treatment processes in use today may be broadly categorized as either fixed film processes or suspended growth processes. Excess biomass is sheared off in the tank, where the rotating action of the disks maintain the solids in suspension. Unique patented media and rotating mechanism that ensure the durability of the shaft and the autocleaning of the media. Operation of rotating biological contactor study on.
Rotating biological contactor rbc lafayette college. Performance and operation of a 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. Rotating biological contactors are an efficient fixedfilm wastewater technology well suited for secondary andor advanced biological treatment. Conventional biological treatment means activated sludge systems and fixed film systems such as trickling filters, or rbc nolde 1996.
They are partially submerged and rotated as wastewater flows through. The discs sit within a trough, with approximately 40% of their diameter covered by the liquid. The complete report, entitled design information on rotating biological contactors, order no. Suspendedgrowth activated sludge processes chapter 6 take place on suspension of the biological solids in a mixed liquid. It is important to maintain the rotation of a rotating bilogical contactor shfte because. Rotating biological contactors sswm find tools for. It provides aerobic treatment of a fixedfilm of biomass. Removal of organic matter has been targeted within organic loading rates of up to 120 g m. Sewage treatment in a rotating biological contactor rbc system. Operation of rotating biological contactor study on sewage.
Rotating biological contactors rbc are a conventional aerobic biological wastewater treatment unit. Introduction to biological treatment of wastewater lecture 29. In the initial design phase, the type and size of the reactor were determined. An rbc contains a number of discs which are arranged along the shaft axis of the contractor. Rotating biological contactor rotofix conventional wastewater treatment systems are ageing throughout communities and municipalities and will need to be replaced sooner or later. Rotating biological contactors rbc rotating biological contactors is used in the secondary treatment of wastewater. The shaft continually rotates at 2 to 8 rpm, and a layer of biological growth 2 to 4 mm thick is soon. The information provided is intended to supplement and qualify that available from rbc manufacturers and the published. Rbc are on the media discs and receive oxygen when rotated out of the wastewater. 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. Modified rotating biological contactor 9 treatment are very effective for biochemical oxygen demand bod removal, nitrification, and denitrification.
This paper describes the performance characteristics of an industrialscale airdriven rotating biological contactor rbc installedinarecirculatingaquaculturesystem ras rearingtilapiaat28 8c. Hochheimer fred wheaton, professor national committee for quality assurance biological resources engineering dept. Biological treatment attachedgrowth processes study. Rotating biological contactor rbc total water solutions. Effluent bod characteristics for secondary treatment are comparable to well operated asp. A rotating biolgoical contactor rbc, is a secondary biological treatment process which utilizes a rotating shaft surrounded by plastic media discs. Process design, parts, upgrades and complete replacement services. Rotating biological contactor rbc as the disk rotates the biofilm is exposed to the wastewater only part of the time. Environmental protection agency cincinnati, oh 45268 usgpo.
Rotating biological contactor rotating biological contactors use a series of slowrevolving discs which are hosts to a biological film that removes pollutants from wastewater. However, the primary manufacturer of rbcs in the united states manufactured. The overall removal efficiencies for chemical oxygen demand codtotal, codsuspended and. Aeration is provided by the rotating action, which exposes the disks to the air after contacting them with the wastewater. The rotation in and out of the wastewater serves to vary the feeding cycle starvegorge of the bacteria and microorganisms that make up the biofilm. Biological wastes 29 1989 271277 a rotating biological extended contactor mirostaw krzemieniewski department of water chemistry and waste treatment, agrotechnical university of olsztyn, 10957 olsztyn, poland received 10 september 1988. The performance of the stepfeedrbc was evaluated in comparison to a regularly fed rbc in terms of nh 3n removals and stagedissolved oxygen do. With the data available, the system can be operated at 2. It is important to maintain the rotation of a rotating bilogical contactor shfte because if the shaft is stopped for long periods of time, the shaft and bearings may. The suspended growth system offers lot many advantages but have serious limitations of power consumption energy requirement. 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.
L o w c o s t r o t a t i n g biological contactor. Working of rotating biological contactor 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. 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. Rotofix operates in at least two stages, design characteristics allowing to reach the desired treatment performance. Rotating biological contactors rbc, also called rotating biological filters, are fixedbed reactors consisting of stacks of rotating disks mounted. The attached growth system overcomes the drawbacks of. A rotating biological contactor or rbc is a biological treatment process used in the treatment of wastewater following primary treatment.
The rotating biological contactor consists of a series of plastic discs mounted on a shaft. Biological nitrification and denitrification sciencedirect. In the past 30 years of company development, we have improved our techniques and have continued to upgrade our products. However, research has shown that rotating a rotor at less than 1. Jul 11, 2006 the treatment of domestic wastewater at a temperature of 1224c was investigated in an rbc system. The advantages of using rotating biological contactors rbc in wastewater treatment plants outweigh the disadvantages of installing and operating the system. It has been widely used for the secondary treatment of domestic and industrial wastewater. Biological wastewater treatment systems video from headworks bio duration. Rotating biological contactor biofilm method wastewater. Tech scholar department of civil engineering kls gogte institute of technology, belgaum, india.
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