Anaerobic Digestion: Difference between revisions

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[[Category:Technologies & Solutions]]

'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by ~~microorganisms~~ in the absence of oxygen in an enclosed vessel. The process produces a [[Biogas]] which can be used for generating renewable power and a nutrient-rich solid/liquor known as [[digestate]] which can be used as fertiliser and compost. Anaerobic Digestion uses biodegradable waste materials from [[Agricultural Waste]] such as manure and slurry, [[Food Waste]] and [[Sewage Sludge]]. Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements.

'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by micro-organisms in the absence of oxygen in an enclosed vessel. The process produces a [[Biogas]] which can be used for generating renewable power and a nutrient-rich solid/liquor known as [[digestate]] which can be used as fertiliser and compost. Anaerobic Digestion uses biodegradable waste materials from [[Agricultural Waste]] such as manure and slurry, [[Food Waste]] and [[Sewage Sludge]]. Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements.

[[File:Biogen AD plant.jpg|350px|left|Biogen Ad Plant in Gwynedd 11,500 tonnes of food waste per year - source Biogen.co.uk]]__TOC__

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==Overview==

'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by ~~microorganisms~~ in the absence of oxygen in an enclosed vessel. The process of AD occurs in several stages and requires a community of micro-organisms:

'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by micro-organisms in the absence of oxygen in an enclosed vessel. [[Biogas]] is produced that can be used for the generation of power (electic and heat), or refined and used as a biomethane, and [[Digestate]] is produced which can be used as a biofertiliser.

The process of AD occurs in several stages and requires a community of micro-organisms:

# Hydrolysis - large, complex polymers like carbohydrates, cellulose, proteins and fats are broken down by hydrolytic enzymes into simple sugars, amino acids and fatty acids.

# Acidogenesis - simple monomers are broken down into volatile fatty acids

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* Crops (including maize, grass siliage, energy beet and whole crop cereals).

Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements. Where AD plants claim renewable subsidies such as [[ROC]]s, ~~[[RHI]]~~ and ~~[[FIT]]~~ they must comply with the requirement to produce an [[Annual Sustainability Report]], which is especially pertinent where crops have been used as part or all of the feedstock.

Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements. Where AD plants claim renewable subsidies, such as [[ROC]]s, and generate ≥1MW they must comply with the requirement to produce an [[Annual Sustainability Report]], which is especially pertinent where crops have been used as part or all of the feedstock.

===Biogas===

@@ Line 1: / Line 1: @@
 [[Category:Technologies & Solutions]]
-'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by microorganisms in the absence of oxygen in an enclosed vessel. The process produces a [[Biogas]] which can be used for generating renewable power and a nutrient-rich solid/liquor known as [[digestate]] which can be used as fertiliser and compost. Anaerobic Digestion uses biodegradable waste materials from [[Agricultural Waste]] such as manure and slurry, [[Food Waste]] and [[Sewage Sludge]]. Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements.
+'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by micro-organisms in the absence of oxygen in an enclosed vessel. The process produces a [[Biogas]] which can be used for generating renewable power and a nutrient-rich solid/liquor known as [[digestate]] which can be used as fertiliser and compost. Anaerobic Digestion uses biodegradable waste materials from [[Agricultural Waste]] such as manure and slurry, [[Food Waste]] and [[Sewage Sludge]]. Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements.
 [[File:Biogen AD plant.jpg|350px|left|Biogen Ad Plant in Gwynedd 11,500 tonnes of food waste per year - source Biogen.co.uk]]__TOC__
@@ Line 6: / Line 6: @@
 ==Overview==
-'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by microorganisms in the absence of oxygen in an enclosed vessel. The process of AD occurs in several stages and requires a community of micro-organisms:
+'''Anaerobic Digestion''' (AD) is a process where biodegradable material is broken down by micro-organisms in the absence of oxygen in an enclosed vessel. [[Biogas]] is produced that can be used for the generation of power (electic and heat), or refined and used as a biomethane, and [[Digestate]] is produced which can be used as a biofertiliser.
+The process of AD occurs in several stages and requires a community of micro-organisms:
 # Hydrolysis - large, complex polymers like carbohydrates, cellulose, proteins and fats are broken down by hydrolytic enzymes into simple sugars, amino acids and fatty acids.
 # Acidogenesis - simple monomers are broken down into volatile fatty acids
@@ Line 21: / Line 22: @@
 * Crops (including maize, grass siliage, energy beet and whole crop cereals).
-Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements. Where AD plants claim renewable subsidies such as [[ROC]]s, [[RHI]] and [[FIT]] they must comply with the requirement to produce an [[Annual Sustainability Report]], which is especially pertinent where crops have been used as part or all of the feedstock.
+Where the process utilises [[Animal By-product Material]], it must comply with the [[Animal By-Products (Enforcement) (England) Regulations 2011]] requirements. Where AD plants claim renewable subsidies, such as [[ROC]]s, and generate ≥1MW they must comply with the requirement to produce an [[Annual Sustainability Report]], which is especially pertinent where crops have been used as part or all of the feedstock.
 ===Biogas===