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 sewage treatment and biogas generation. Anaerobic digesters can be categorized according to two main criteria: by whether the biomass is fixed to a surface ("attached growth") or can mix freely with the reactor liquid ("suspended growth"); and by the organic loading rate (the influent mass rate of chemical oxygen demand per unit volume).[1] The widely used UASB reactor, for example, is a suspended-growth high-rate digester, with its biomass clumped into granules that will settle relatively easily and with typical loading rates in the range 5-10 kgCOD/m3/d.[1]
Examples of anaerobic digesters include:
- Anaerobic activated sludge process
- Anaerobic clarigester
- Anaerobic contact process
- Anaerobic expanded-bed reactor
- Anaerobic filter
- Anaerobic fluidised bed
- Anaerobic lagoon
- Anaerobic MBRs
- Anaerobic migrating blanket reactor
- Batch system anaerobic digester
- Continuous stirred-tank reactor (CSTR)
- Expanded granular sludge bed digestion (EGSB)
- Hybrid reactor
- Imhoff tank
- Internal circulation reactor (IC)
- One-stage anaerobic digester
- Plug-flow anaerobic digester
- Submerged media anaerobic reactor
- Sintex Digester
- Two-stage anaerobic digester
- Upflow anaerobic sludge blanket digestion (UASB)
- Upflow and down-flow anaerobic attached growth
- 1 2 Grant, Shannon R.; Shashi Gorur; James C. Young; Robert Landine; Albert C. Cocci; C. Calvert Churn (November 2002). "An Anaerobic Exercise: A comparison of anaerobic treatment technologies for industrial wastewater". Environmental Protection: 18–26. Retrieved 4 Jan 2013.
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