Thermophilic Aerobic Digestion: Difference between revisions
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Thermophilic Aerobic Digestion (TAD) is essentially a [[Compost]] process which can be used to treat waste food or other organic materials in a liquid slurry or semi-solid form. | Thermophilic Aerobic Digestion (TAD) is essentially a [[Compost]] process which can be used to treat waste food or other organic materials in a liquid slurry or semi-solid form<ref name="foo">WRAP (2016). Thermophilic Aerobic Digestion | WRAP UK. [online] Wrap.org.uk. Available at: http://www.wrap.org.uk/collections-and-reprocessing/organic-waste/composting/guidance/thermophilic-aerobic-digestion [Accessed 4 Nov. 2019]</ref> | ||
The outline process is as below | The outline process is as below | ||
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* The process is exothermic, and the heat is maintained at thermophilic conditions of between 55-65°C. | * The process is exothermic, and the heat is maintained at thermophilic conditions of between 55-65°C. | ||
* The retention time of the process is usually between two and five days, as degradation is rapid. | * The retention time of the process is usually between two and five days, as degradation is rapid. | ||
* Following digestion, the digestate is usually dewatered or dried. The output is a bio-fertiliser. | * Following digestion, the digestate is usually dewatered or dried. The output is a bio-fertiliser<ref name="foo" />. | ||
Thermophilic Aerobic Digestion has been used in the waste-water industry for the treatment of [[Sewage Sludge]]. | Thermophilic Aerobic Digestion has been used in the waste-water industry for the treatment of [[Sewage Sludge]]. | ||
Its use is relatively new for [[Food Waste]], although there are some small pilot-scale plants in the UK and some commercial ones in development <ref> | Its use is relatively new for [[Food Waste]], although there are some small pilot-scale plants in the UK and some commercial ones in development <ref name="foo" />. | ||
==References== | |||
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Revision as of 12:53, 13 November 2019
Thermophilic Aerobic Digestion (TAD) is essentially a Compost process which can be used to treat waste food or other organic materials in a liquid slurry or semi-solid form[1]
The outline process is as below
- Feedstock is fed into a digester where air is forced through the material to encourage the growth of aerobic microbes.
- The process is exothermic, and the heat is maintained at thermophilic conditions of between 55-65°C.
- The retention time of the process is usually between two and five days, as degradation is rapid.
- Following digestion, the digestate is usually dewatered or dried. The output is a bio-fertiliser[1].
Thermophilic Aerobic Digestion has been used in the waste-water industry for the treatment of Sewage Sludge. Its use is relatively new for Food Waste, although there are some small pilot-scale plants in the UK and some commercial ones in development [1].
References
- ↑ 1.0 1.1 1.2 WRAP (2016). Thermophilic Aerobic Digestion | WRAP UK. [online] Wrap.org.uk. Available at: http://www.wrap.org.uk/collections-and-reprocessing/organic-waste/composting/guidance/thermophilic-aerobic-digestion [Accessed 4 Nov. 2019]