Anaerobic digester types
Encyclopedia
The following is a partial list of different types of anaerobic digesters. These processes and systems harness anaerobic digestion
for purposes such as sewage treatment
and biogas
generation.
Examples include:
Anaerobic digestion
Anaerobic digestion is a series of processes in which microorganisms break down biodegradable material in the absence of oxygen. It is used for industrial or domestic purposes to manage waste and/or to release energy....
for purposes such as sewage treatment
Sewage treatment
Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants from wastewater and household sewage, both runoff and domestic. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants...
and biogas
Biogas
Biogas typically refers to a gas produced by the biological breakdown of organic matter in the absence of oxygen. Organic waste such as dead plant and animal material, animal dung, and kitchen waste can be converted into a gaseous fuel called biogas...
generation.
Examples include:
- Anaerobic activated sludge process
- Anaerobic clarigesterAnaerobic clarigesterThe anaerobic clarigester is a form of anaerobic digester. It is regarded as being the ancestor of the UASB anaerobic digester. A clarigester treats dilute biodegradable feedstocks and separates out solid and hydraulic retention times...
- Anaerobic contact processAnaerobic contact processThe anaerobic contact process is a type of anaerobic digester. Here a set of reactors are created in series, often with recycling. This recycled material is pumped up into the bottom of the first reactor, an upflow reactor. The upflow anaerobic process is a large reactor which allows the waste to...
- Anaerobic expanded-bed reactor
- Anaerobic filterAnaerobic filterIn sewage treatment systems, an anaerobic filter is a form of anaerobic digester. The digestion tank contains a filter medium where anaerobic microbial populations — organisms that live in the absence of oxygen — can establish themselves. Such filters are commonly employed in the treatment of...
- Anaerobic fluidised bed
- Anaerobic lagoonAnaerobic lagoonAnaerobic Lagoon or Manure Lagoon is a man made outdoor earthen basin filled with excrement. Lagoons are part of a system designed to manage and treat waste created by Concentrated Animal Feeding Operations . Anaerobic lagoons are created from a manure slurry which is washed out from underneath the...
- Anaerobic migrating blanket reactor
- Batch system anaerobic digester
- Continuous stirred-tank reactor (CSTR)
- Expanded granular sludge bed digestionExpanded granular sludge bed digestionAn expanded granular sludge bed reactor is a variant of the UASB concept. The distinguishing feature is that a faster rate of upward-flow velocity is designed for the wastewater passing through the sludge bed...
(EGSB) - Hybrid reactorHybrid reactorA 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.-See also:*Anaerobic digester types...
- Imhoff tankImhoff tankThe Imhoff tank, named for German engineer Karl Imhoff , 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...
- Internal circulation reactorInternal circulation reactorThe internal circulation 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 . In essence the IC to improve digestion...
(IC) - One-stage anaerobic digester
- Plug-flow anaerobic digester
- Submerged media anaerobic reactor
- Sintex Digester
- Two-stage anaerobic digester
- Upflow anaerobic sludge blanket digestionUpflow anaerobic sludge blanket digestionUpflow anaerobic sludge blanket technology, normally referred to as UASB reactor, is a form of anaerobic digester that is used in the treatment of wastewater....
(UASB) - Upflow and down-flow anaerobic attached growth