This was due to the fact that more oxygen transfer occurs in the anaerobic contact com pletely mixed reactor than in the anaerobic filter reactor. The upflow anaerobic sludge blanket reactor uasb is a single tank process. Startup of the anaerobic reactors was improved using lactose as co. Anaerobic filter packed bed various types of support. In the anaerobic upflow reactor, the influent is introduced at the bottom of the vertical reactor. Other types of anaerobic digesters, such as attached media filters. The effective volume of the af reactors was 90 liters for each anaerobic.
Comparison between anaerobic filter and anaerobic contact. As wastewater flows through the filter, particles are trapped and organic matter is degraded by the active biomass that is attached to the surface of the filter. The packing support may be either a perforated sheet or a grid having openings smaller than the packings. The three anaerobic columns had an internal width of 20 cm and a height of 300 cm. They pointed out a number of favorable potential advantages. It is a cylindrical column fitted with a packing support near its bottom. Loading rates are therefore, primarily dictated by the concentration of active biomass in anaerobic reactors.
Upflow anaerobic sludge blanket uasb reactor in wastewater. It has a high potential to be processed into biogas. As wastewater flows through the filter, particles are trapped and organic matter is degraded by the active biomass that is attached to the surface of the filter material. Anaerobic filter reactor young and mccarty 1969 proposed for the first time the fixedbed digester or af reactor for the treatment of domestic sewage. The sludge is mixed with wastewater in the reactor and is then separated in the sedimentation tank and returned to the reactor. Treatment of poultry slaughterhouse wastewater in upflow. Developed by mccarty and coworkers at stanford university, the abr was described as a series of upflow anaerobic sludge blanket reactors. The study of immobilized media and ni ion addition effects on. Anaerobic sequencing batch reactor a batch reaction process where influent wastewater sequentially. The significant difficulty in hybrid anaerobic baffled reactor operation is the slow startup procedure, which is crucial to the overall polyvinyl alcoholcontaining desizing wastewater treatment. Treatment of slaughterhouse wastewater in a uasb reactor. Different types of reactor configurations used for the anaerobic treatment of wastewaters are presented in this chapter. It works by creating a sludge filter made up of bacteria and other microorganisms.
The digestion tank contains a filter medium where anaerobic microbial populationsorganisms that live in the absence of oxygen can establish themselves. An anaerobic filter is a fixedbed biological reactor with one or more filtration chambers in series. The greater stability of the anaerobic filter facilitates its startup when variations in the. Both were made of transparent pvcu tubing d af 8 cm, d anmbbr 12 cm with a total volume of 3. The anaerobic filter reactor remained more stable than the anaerobic contact. Therefore, the ability of a hybrid anaerobic baffled reactor, treating desizing wastewater, to achieve a prompt startup was studied at labscale. Wastewater enters the reactor from the bottom, and flows upward.
Media filters use microorganisms that are attached to a high surface area medium to primarily remove soluble organic matter measured as biochemical oxygen demand bod or chemical oxygen demand cod from wastewater as it passes through the medium. Hydrodynamic behaviour and its effects on the treatment. An anaerobic baffled reactor abr is an improved 879septic tank with a series of baffles under which the noecompendiumgrey, black or the industrial noecompendiumwastewater is forced to flownoecompendium under and offer the baffles from the inlet to the outletnoecompendium. Anaerobic filters were the first anaerobic systems that eliminated the need for solids separation and recycle while providing a high srthrt ratio. Therefore, the current study provides a thorough investigation include experimental testing on the use of a passive aeration followed by an aerobic biological filter for improving the effluent quality of the twostage anaerobic system at different operating conditions. The dimension calculation of both abr and af are referring to a design criteria.
This project has studied the appropriateness of the anaerobic baffled reactor abr for onsite primary sanitation, particularly in lowincome communities. Uasb reactor is a methaneproducing digester, which uses an anaerobicprocess and forming a blanket of granular sludge and is processed by the anaerobic microorganisms. A high correlation is expected between cod removals with. The contact reactor is comparable with a conventional active sludge system, but under anaerobic conditions. Schematic of the anaerobic expanded bed reactor 90 figure 21. The sequential anaerobicaerobic reactor is highly suitable for tannery waste water 2. This design gives two alternatives that will be used, anaerobic baffled reactor abr and anaerobic filter af. Schematic of the anaerobic filter reactor 79 figure 19. Request pdf operation of an anaerobic filter and an egsb reactor for the treatment of an oleic acidbased effluent. Anaerobic reactors have been successfully installed in fullscale plants world wide for treating highstrength industrial wastewater over the years.
One type of highrate reactor is the anaerobic baffled reactor abr. One of the advanced solutions to improve the efficiency of anaerobic treatment is to integrate anaerobic wastewater treatment reactor with membrane filtration process to form an anaerobic membrane bioreactor system. Effects of media design on anaerobic filter performance. In anaerobic filters, the biofilm is retained within the reactor on filters made from materials such as ceramics, glass, engineered plastics, or wood. Below the packing support the column has a conical. Experimentation on the anaerobic filter reactor for. Pdf anaerobic filter treatment of municipal wastewater. The pabfr has five compartments of equal size in which the first three compartments operate as anaerobic baffled reactor abr followed by anaerobic filters af. An anaerobic baffled reactor abr is an improved septic tank with a series of baffles under which the grey, black or the industrial wastewater is forced to flow under and offer the baffles from the inlet to. Operation of an anaerobic filter compared with an anaerobic. An anaerobic filter af and a downflow stationary fixed film dsff reactor were used for the treatment of a tuna processing wastewater. The wastewater discharged by poultry slaughterhouse industries are characterized mainly by high biochemical oxygen demand, high suspended solids and complex mixture of fats, proteins and fibers requiring systematic treatment prior to disposal.
Performance of upflow anaerobic sludge blanket uasb. Almost all upflow fixedmedia reactors constructed since 1985 have been designed using the hybrid configuration. Chapter 7 anaerobic reactor technologies slowly growing anaerobic bacteria require longer sludge retention times srt in anaerobic reactors. The abr consists of alternating hanging and standing baffles, which compartmentalise the reactor. Refer to figure 1 and 2 for a schematic of an uasbs and an abr. Upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used for wastewater treatment the uasb reactor is a methanogenic methaneproducing digester that evolved from the anaerobic. The pilotscale experiments were realized in anaerobic baffled filter with total volume of 2 m3. Design of an anaerobic digester for wastewater treatment. Alternative design of wastewater treatment plant with anaerobic baffled reactor and anaerobic filter for romokalisari flats surabaya article pdf available january 2016 with 475 reads. 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. Anaerobic sequencing batch reactor treatment of low. The experiments involved two anaerobic reactor systems, namely one anaerobic filter af and one anaerobic moving bed bioreactor anmbbr.
Apr 30, 2020 the filter takes three months to reach maturity, but has a number of advantages. The two units are selected because of the cheap construction and operational cost as well as an easy maintenance. An anaerobic filter reactor is basically a packed bed. The usab design is tailor made to suit the wastewater characteristics given in table 2. Slaughterhouse wastewater treatment by combined anaerobic baffled reactor and anaerobic filter. Anaerobic filters are usually operated in upflow mode because there is less risk that the fixed biomass will be washed out. The study also evaluated the capability of soft filler to train granule sludge and improve the anaerobic environment and sludge activity in the anaerobic baffled reactor abr, thereby enhancing the treatment. A study was performed to assess the feasibility of anaerobic treatment of slaughterhouse wastewaters in a uasb upflow anaerobic sludge blanket reactor and in an af anaerobic filter. Treatment of slaughterhouse wastewater in a uasb reactor and. Schematic of the anaerobic fluidized bed reactor 93 figure 22. Such filters are commonly employed in the treatment of waste water. Operating principles of an anaerobic batch reactor. Developed by mccarty and coworkers at stanford university, the abr was described as a series of upflow anaerobic sludge blanket reactors uasbs because it is divided into several compartments 3, 5, 16. The sequential anaerobic aerobic reactor is highly suitable for tannery waste water 2.
In conclusion, anaerobic filter treatment of organic matter substrates from the rural domestic wastewater increases the efficiency of the af reactor on biogas. The columns was filled with filter material of nonwoven fabric with a length of 25 cm, width of 0. Operation of an anaerobic filter and an egsb reactor for. The aim of this paper was to present the influence of hydraulic behaviour in the treatment of sewage domestic wastewater using panelled anaerobic bafflecum filter reactor pabfr. Polyurethane trickling filter in combination with anaerobic hybrid reactor for treatment of tomato industry wastewater 359 fixation, samples were rinsed three times in 0. Other types of anaerobic digesters, such as attached media filters and sludge blankets, may serve to provide technical and economic benefit in future. Upflow anaerobic sludge blanket uasb reactor influent wastewater is discharged into the bottom of a reactor and flows upwards through a layer of naturally forming sludge pellets. Pdf alternative design of wastewater treatment plant. 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 reactor was housed in a temperaturecontrolled room maintained at 30 c. The problem associated with packed bed anaerobic filters and fluidized or expanded bed reactors has led to. Consequently, maintenance of a high srt is the major. Pdf production of vitamin b12 in an upflow anaerobic. As wastewater flows through the filter, particles are trapped and.
Hybrid anaerobic baffled reactor for treatment of desizing. Effluent from the anoxic reactor is treated in a septic tank for solids removal before being discharged. Upflow anaerobic sludge blanket digestion wikipedia. Upflow anaerobic sludge blanket uasb technology, normally referred to as uasb reactor, is a form of anaerobic digester that is used for wastewater treatment the uasb reactor is a methanogenic methaneproducing digester that evolved from the anaerobic clarigester. Operation of an anaerobic filter and an egsb reactor for the. Figure 1 provides a schematic of the anaerobic baffled filter reactor. Unesco eolss sample chapters water and wastewater treatment technologies upflow anaerobic sludge blanket uasb reactor in wastewater treatment k.
The filter material typically occupies 60%70% of the reactor volume. Influence of inoculum quality an expanded granular sludge bed egsb reactor. In sewage treatment systems, an anaerobic filter af is a form of anaerobic digester. Up flow anaerobic sludge blanket technology also known as uasb reactor is a form of anaerobic digester which used in wastewater treatment. Application of anaerobic systems for municipal sewage treatment is so far very limited. A total cod cod t removal of 71% was achieved with 60% conversion to methane. The daily inetharie production and cod removal recorded with the anaerobic filter were greater tliari those obtained in the anaerobic contact reactor. One of the technologies that has been developed in processing pome is fixed film bioreactor or anaerobic filter reactor afr. Anaerobic membrane bioreactors anmbr for wastewater treatment. The two units are selected because of the cheap construction and operational.
Anaerobic filter reactors iowa state university digital repository. Afr is able to handle waste with high organic loading rate by using bacterial attached growth solid media on the surface of the media to. Palm oil mill effluent pome liquid waste contains high organic compounds. In this study, the performance of an upflow anaerobic filter reactor. The polypropylene polyhedral spherical inert media are suitable in reactor 3. Anaerobic lagoon, anaerobic contact process, anaerobic filter, upflow anaerobic sludge blanket reactor, fluidized bed reactor, expanded granular sludge bed reactor, internal circulation reactor, anaerobic baffled reactor, membrane coupled highrate and cstr systems. One of the more interesting new processes is the up flow anaerobic sludge blanket process uasb, which was developed by lettinga and his co workers in holland in the early 1970s anaerobic granular sludge bed technology refers to a special kind of reactor concept for the high rate anaerobic. The upflow anaerobic sludge blanket uasb reactor has been recognized as an important wastewater treatment technology among anaerobic treatment methods. Studies on continuous stirred tank reactor cstrtype anaerobic. Sean moran, in an applied guide to water and effluent treatment plant design, 2018. Slaughterhouse wastewater treatment by combined anaerobic. Media heights have ranged from essentially fulldepth i.
Pdf alternative design of wastewater treatment plant with. An advantage of the uasb anaerobic reactor is that it reduces the amount of post reactor treatment waste products require. This study investigated the performance and stability of an anaerobic baffled filter reactor in the treatment of algaeladen water from taihu lake at several organic loading rates. Alternative design of wastewater treatment plant with. The polypropylene polyhedral spherical inert media are suitable in reactor. The study also evaluated the capability of soft filler to train granule sludge and improve the anaerobic environment and sludge activity in the anaerobic baffled reactor. Anaerobic filter packed bed various types of support material can be used, such as plastics, granular activated carbon gac, sand, reticulated foam polymers, granite, quartz and stone. Below the packing support the column has a conical section where sludge collects. Therefore, the current study provides a thorough investigation include experimental testing on the use of a passive aeration followed by an aerobic biological filter for improving the effluent quality of the twostage anaerobic.
836 439 208 1662 1118 866 1347 190 1478 1565 830 527 1369 188 666 638 1293 612 330 1518 1360 1154 987 1189 936 633 644 261 1208 1172 713 625 225 535 983 1233 1646 561 1272 967 1471 1026 826 1312 682 1424 607 294 325