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Anaerobic Digester Types
The following is a partial list of types of anaerobic digesters. These processes and systems harness anaerobic digestion for purposes such as treatment of biowaste, animal manure, sewage and biogas generation. Anaerobic digesters can be categorized according to several criteria: by whether the biomass is fixed to a surface ("attached growth") or can mix freely with the reactor liquid ("suspended growth"); by the organic loading rate (the influent mass rate of chemical oxygen demand per unit volume); by centralized plants and decentralized plants. Most anaerobic digesters worldwide are built based on wet-type anaerobic digestion, wherein biomass (usually animal dung) and water are mixed in equal amounts to form a slurry in which the content of total solids (TS) is about 10-15%. While this type is suitable for most regions, it becomes a challenge in large plants where it necessitates the use of large quantities of water every day, often in water-scare areas. Solid-state type digesters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Comparison Of Common Biogas Technologies
Comparison or comparing is the act of evaluating two or more things by determining the relevant, comparable characteristics of each thing, and then determining which characteristics of each are similar to the other, which are different, and to what degree. Where characteristics are different, the differences may then be evaluated to determine which thing is best suited for a particular purpose. The description of similarities and differences found between the two things is also called a comparison. Comparison can take many distinct forms, varying by field: To compare things, they must have characteristics that are similar enough in relevant ways to merit comparison. If two things are too different to compare in a useful way, an attempt to compare them is colloquially referred to in English as "comparing apples and oranges." Comparison is widely used in society, in science and in the arts. General usage Comparison is a natural activity, which even animals engage in when deci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anaerobic Migrating Blanket Reactor
Anaerobic means "living, active, occurring, or existing in the absence of free oxygen", as opposed to aerobic which means "living, active, or occurring only in the presence of oxygen." Anaerobic may also refer to: * Anaerobic adhesive, a bonding agent that does not cure in the presence of air *Anaerobic respiration, respiration in the absence of oxygen, using some other molecule as the final electron acceptor **Anaerobic organism, any organism whose redox metabolism does not depend on free oxygen **Anammox, anaerobic ammonium oxidation, a globally important microbial process of the nitrogen cycle **Anaerobic filter, an anaerobic digester with a tank containing a filter medium where anaerobic microbes can establish themselves **Anaerobic digestion, the use of anaerobic bacteria to break down waste, with biogas as a byproduct ***Anaerobic clarigester, an anaerobic digester that treats dilute biodegradable feedstocks and allows different retention times for solids and liquids ***Anaer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Upflow Anaerobic Sludge Blanket Digestion
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 (methane-producing) digester that evolved from the anaerobic clarigester. A similar but variant technology to UASB is the expanded granular sludge bed (EGSB) digester. Process description UASB uses an anaerobic process whilst forming a blanket of granular sludge which suspends in the tank. Wastewater flows upwards through the blanket and is processed (degraded) by the anaerobic microorganisms. The upward flow combined with the settling action of gravity suspends the blanket with the aid of flocculants. The blanket begins to reach maturity at around three months. Small sludge granules begin to form whose surface area is covered in aggregations of bacteria. In the absence of any support matrix, the flow conditions create a selective environment in which only those microorganisms capable of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sintex Digester
Sintex group, formerly known as The Bharat Vijay Mills Ltd and Sintex Industries Ltd, is the world's largest producer of plastic water tanks and Asia's largest manufacturer of corduroy fabrics. Sintex operates in Europe, America, Africa, and Asia, especially in France, Germany, and the US. It primarily works with building materials, textiles, prefabricated structures, custom molding products, monolithic construction and water storage tanks. History (founding to demerger) Bharat Vijay Mills Limited was incorporated in June 1931 and started a composite textile mill in Kalol, Gujarat that same year. In 1975 it was renamed Sintex Industries Limited and was listed on the Mumbai Stock Exchange in 2000. Sintex expanded significantly in the 2000s, including the acquisition of U.S.-based Wausaukee Composites. In 2007 the offshore holdings segment, Sintex Holdings BV Netherlands, acquired the automotive branch of Bright Brothers Ltd to form Bright Autoplast, also called Sintex-BAPL, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submerged Media Anaerobic Reactor
Submerge (and its variants) means to be covered by something (usually a liquid), such as being underwater: * Submerged arc welding * Submerged continent * Submerged forest * Submerged floating tunnel * Submerged specific gravity * Submergent coastline * Submergent plant * Submersible * Submersible bridge * Submersible drilling rig * Submersible mixer * Submersisphaeria, submerged fungi genus * Ceratophyllum submersum, submerged, free-floating, aquatic plant * the action of a submarine of diving below the surface of water Submerge, Submerged, or Submersed may also refer to: * ''Submerge'', 1998 album by the Japanese alternative rock band Coaltar of the Deepers * Submerge (nightclub), Indian nightclub * ''Submerged'' (2000 film), a 2000 film * ''Submerged'' (2005 film), a 2005 film * ''Submerged'' (2016 film), a 2016 film * ''Submerged'' (video game), a 2015 video game * ''Submerged'', a one-act play written in 1929 by Clay Shaw and Herman Stuart Cottman * ''Submerged' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internal Circulation Reactor
The internal circulation reactor (IC reactor) is a form of anaerobic digester. It is primarily designed to treat wastewater. The IC reactor is an evolution of the UASB and EGSB digestion systems. The digester typically produces biogas with a high concentration methane (c80%). In essence the IC to improve digestion rates and gas yields. The foot print for the IC reactor is therefore typically smaller. However, it is taller due to the increased complexity of the reactor. The IC reactor typically comes as part of a two-stage anaerobic digestion system where it is preceded by an acidification and hydrolysis tank. Effluent leaving the IC reactor will often require aerobic treatment to reduce biochemical (BOD) and COD to discharge consent levels. See also *Anaerobic digester types The following is a partial list of types of anaerobic digesters. These processes and systems harness anaerobic digestion for purposes such as treatment of biowaste, animal manure, sewage and biogas generat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imhoff Tank
The Imhoff tank, named for German engineer Karl Imhoff (1876–1965), is a chamber suitable for the reception and processing of sewage. It may be used for the clarification of sewage by simple settling and sedimentation, along with anaerobic digestion of the extracted sludge. It consists of an upper chamber in which sedimentation takes place, from which collected solids slide down inclined bottom slopes to an entrance into a lower chamber in which the sludge is collected and digested. The two chambers are otherwise unconnected, with the more liquid sewage flowing only through the upper sedimentation chamber and only a slow flow of sludge in the lower digestion chamber. The lower chamber requires separate biogas vents and pipes for the removal of digested sludge, typically after 6–9 months of digestion. The Imhoff tank is in effect a two-story septic tank and retains the septic tank's simplicity while eliminating many of its drawbacks, which largely result from the mixing of fres ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybrid Reactor
:''See Hybrid nuclear fusion for the proposed nuclear reactor.'' A hybrid biological reactor (HBR) was developed which involved the introduction of a new phase of attached-biomass into a regular suspended-growth system (activated sludge process) by addition of carriers to the aeration tanks. A novel hybrid biological reactor which contained both suspended and attached-growth biomass was developed by introducing porous materials into a regular activated sludge unit and used for the treatment of domestic wastewater. A hybrid reactor is an anaerobic digester that combines a UASB reactor with an anaerobic filter. This combination is an advanced form enabling improved solid retention time in the treatment of waste water. This waste water can be built up in the secondary chamber and must be removed daily or an explosion is imminent to occur. See also *Anaerobic digester types The following is a partial list of types of anaerobic digesters. These processes and systems harness anaer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Expanded Granular Sludge Bed Digestion
An expanded granular sludge bed (EGSB) reactor is a variant of the upflow anaerobic sludge blanket digestion (UASB) concept for anaerobic wastewater treatment. The distinguishing feature is that a faster rate of upward-flow velocity is designed for the wastewater passing through the sludge bed. The increased flux permits partial expansion (fluidisation) of the granular sludge bed, improving wastewater-sludge contact as well as enhancing segregation of small inactive suspended particle from the sludge bed. The increased flow velocity is either accomplished by utilizing tall reactors, or by incorporating an effluent recycle (or both). A scheme depicting the EGSB design concept is shown in thiEGSB diagram The EGSB design is appropriate for low strength soluble wastewaters (less than 1 to 2 g soluble COD/l) or for wastewaters that contain inert or poorly biodegradable suspended particles which should not be allowed to accumulate in the sludge bed. See also *Anaerobic digester types * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
