Tech4Biowaste - User contributions [en]

Anaerobic digestion

2022-07-29T15:19:29Z

Nathan Deman: /* Dranco */

{{Infobox technology|Name=Anaerobic digestion|Category=[[Conversion]] ([[Conversion#Biochemical_processes_and_technologies|Biochemical processes and technologies]])|Feedstock=[[Biowaste]] in general, [[Food waste]], [[Garden and park waste]] (wood, leaves)|Product=Biogas and digestate}}
<onlyinclude>'''Anaerobic digestion''' is a process through which micro-organisms break down organic matter, such as animal manure, wastewater biosolids, and food wastes, in the absence of oxygen. Anaerobic digestion intended for biogas production takes place in a sealed tank (called an anaerobic digester), which is designed and constructed in various shapes and sizes specific to the site and feedstock conditions. These sealed vessels contain complex microbial communities that break down the waste and produce biogas and digestate (i.e., the solid and liquid material end-products of the process). The biogas can be used as a source of energy. The remaining digestate can be used as a fertiliser, or it can be post-treated according to its intended use, e.g. by drying or composting to use it as a soil improvement agent.</onlyinclude>

== Feedstock ==
=== Origin and composition ===
Multiple organic materials can be combined in one digester, a practice called co-digestion. Co-digested materials include, amongst others, manure, food waste, energy crops, crop residues, and fats, oils, and greases (FOG) from restaurant grease traps.

=== Pre-treatment ===
Biomass is first separated from impurities as stones and glass. An agitator provides a good mixing between different biomass types to avoid strong changes in composition. The feed is a stirrable mixture and the dry matter content may be a maximum of 15-20% of the slurry. Co-substrates are often reduced in size by shredding before they are fed in order to make the contact surface of the biomass as large as possible.

For residual flows from the food industry, crop residues and manure, thermal and chemical pre-treatments are mainly applied. The most important effects of thermal pre-treatment are: reducing particle size, increasing solubility and improve the biodegradability. Additional advantages of thermal pre-treatment are: (1) higher loading of the digester is possible, (2) lower viscosity of the treated material which results in lower energy input for mixing the digester, (3) improved dewaterability of digestate and (4) sanitised product.

The following pre-treatments may be considered :

* [[Membrane filtration]]
*[[Sieving]]
* [[Sizing]] (e.g. chipping, grinding)
* Thermal pre-treatment

== Process and technologies ==
=== Process ===
There are three basic anaerobic digestion processes, namely psychrophilic, mesophilic, and thermophilic, which take place over different temperature ranges. Psychrophilic digestion is a low temperature (<20°C) process. Mesophilic digestion takes place between 20 and 45°C, which can take a month or two to complete, and thermophilic digestion between 45 and 65°C, which is faster, but its micro-organisms are more sensitive. The majority of the agricultural biogas plants are operated at mesophilic temperatures. Thermophilic temperatures are applied mainly in large-scale centralised biogas plants with co-digestion<ref>{{Cite web|year=2021|title=Anaerobic digestion|e-pub date=2021|date accessed=6/9/2021|url=https://www.eubia.org/cms/wiki-biomass/anaerobic-digestion/}}</ref>. The process of anaerobic digestion takes place through four successive stages: hydrolysis, fermentation, acetogenesis, and methanogenesis.<ref>{{Cite journal|author=Junye Wang|year=2014|title=Decentralized biogas technology of anaerobic digestion and farm ecosystem: opportunities and challenges|journal=Fronties in Energy Research|volume=2|page=|doi=10.3389/fenrg.2014.00010}}</ref> In the hydrolysis step, the feedstock is broken down into soluble substrates (e.g., sugar and amino acids) by enzymes. Fermentation involves the conversion of sugar, amino acids, and fatty acids into ammonia, organic acids, hydrogen (H2) and CO2. In the acetogenesis step, volatile fatty acids are broken down into acetic acids, CO2 and H2. Finally, methanogenesis step converts acetate, formaldeyde, and H2 to CH4 and water<ref>{{Cite journal|author=Jay N. Meegoda, Brian Li, Kush Patel, Lily B. Wang|year=2018|title=A review of the Processes, Parameters, and Optimization of Anaerobic Digestion|journal=International Journal of Environmental Research and Public Health|volume=15|page=|doi=10.3390/ijerph15102224}}</ref>.
[[File:Anaerobic stages.png|thumb|Simplified scheme of pathways in anaerobic digestion (not own work)]]

Usually, the produced biogas must be dried and drained for condense water and biological or chemical cleaned for H2S, NH3 and trace elements. Further upgrading of the biogas to increase the CH4 content could be realized by membrane separation of CO2 and pressurising the biogas.
== Product ==
Anaerobic digestion produces two valuable outputs, namely biogas and digestate. Biogas is composed of methane (CH4), which is the primary component of natural gas, at a relatively high percentage (50 to 75%), carbon dioxide (CO2), hydrogen sulfide (H2S), water vapor, and trace amounts of other gases. The energy in biogas can be used like natural gas to provide heat, generate electricity, and power cooling systems. Biogas can also be purified by removing the inert or low-value constituents (CO2, water, H2S, etc.) to generate renewable natural gas (RNG). This can be sold and injected into the natural gas distribution system, compressed and used as vehicle fuel, or processed further to generate alternative transportation fuel or other advanced biochemicals and bioproducts.

The digestate can be used in many beneficial applications provided that is is appropriately treated post processing. This could be in form of animal bedding, nutreint-rich fertilizer, organic-rich compost, or as soil amendment.

=== Post-treatment ===
The remaining digestate can be post-treated according to its intended use, e.g. by drying or composting to use it as a soil improvement agent.

== Technology providers ==
{| class="wikitable sortable mw-collapsible mw-collapsed"
|+'''Technology comparison'''
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Company name
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Country
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Technology category
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Technology name
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| TRL
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Capacity [kg/h]
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Processable mass [kg]
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Temperature [°C]
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Feedstock: Food waste
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Feedstock: Garden & park waste
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Product: biogas
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Product: Renewable natrual gas (RNG)
|-
! style="height:1.8em;"|
!
!
!
!
!
!
!
!
!
!
!
|-
| [[Anaerobic digestion#Biogas Plus|Biogas Plus]]
| The Netherlands
| -
| Compact Plus
| 9
| -
| -
| -
|
|
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
|
|-
| [[Anaerobic digestion#BioRenGaz|BioRenGaz]]
| France
| -
| Bioreactor
| 7
| -
| -
| -
|
|
|
|
|-
|[[Anaerobic digestion#Dranco|Dranco]]
|Belgium
|
|DRANCO Dry anaerobic digestion
| -
|5000
| -
| -
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
|
|
|
|-
|[[Anaerobic digestion#Planet Biogas|Planet Biogas]]
|Germany
| -
|PlanET
|9
| -
| -
| -
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
|
|}
=== Biogas Plus ===
{{Infobox provider-anaerobic digestion|Company=Biogas Plus|Webpage=https://www.biogasplus.nl|Country=The Netherlands|Reactor=Complete mix digester|Capacity=18.000 tons (input), 320.000 Nm3 green gas/year (output).|Feedstock=Animal Manure|Product=Green gas|TRL=9|Technology name=Compact Plus}}

=== BioRenGaz ===
{{Infobox provider-anaerobic digestion|Company=BioRenGaz|Country=France|Webpage=https://www.biorengaz.com/|Contact=contact@biorengaz.com|Image=BioRenGaz_icone.png|TRL=7|Technology name=Bioreactor}}

BioRenGaz has developed a new patented anaerobic digestion technology that is 4 times more efficient and much more compact than conventional biogas plants thanks to vertical silo design. The anaerobic filter uses a recycled and 100% renewable packing material to replace costly and polluting plastic packing. This medium provides an ecological habitat for the bacteria and enhances their performance. The solution is adapted for the treatment of liquid effluents and the great advantage, unlike other technologies, is that it can also valorize pulpy effluents like biowaste pulp. The bioreactors have lower operational costs and increased energy production by keeping the micro-organisms on the packing material, which allows producing 10% more biogas. The system is modular, so bioreactors can be built from a small scale and easily be expanded as needed. The Solution aims for the optimization of the economic and environmental model of energy and agronomic recovery of biowaste.

=== CCS ===
CCS Enegie-advies together with Greenmac developed the Bio-UP technology which is able to upgrade the produced biogas into green gas. CCS offers the Bio-UP technology via lease contracts or turn-key. The Bio-UP is a proven concept which already operates at "melkveeproefbedrijf De Marke".

=== Dranco ===
{{Infobox provider-anaerobic digestion|Company=DRANCO nv|Country=Belgium|Contact=Bruno Mattheeuws (bm@dranco.be)|Webpage=https://www.dranco.be|TRL=Successful Deployment|Technology name=DRANCO Dry anaerobic digestion|Capacity=>5000|Feedstock=biowaste, SSO, MSW, residual waste, ...|Reactor=2500-5000m³|Image=Logo dranco.png|Product=Digestate and/or high quality compost + biogas}}
DRANCO nv has developed innovative and patented designs for biogas plants, with a pretreatment, digester concept and post-treatment adapted to each type of feedstock. Find out about our 30+ years of experience and our 35 references!

=== Envitec ===

=== Fiberight ===

=== Host ===

=== Planet Biogas ===
{{Infobox provider-anaerobic digestion|Company=PlanEt Biogas Group GmbH|Webpage=https://www.planet-biogas.com|Country=Germany|Technology name=PlanET|TRL=9|Reactor=Complete mix digester (modular)|Feedstock=Animal manure, biogenic waste materials|Product=Green gas, heat & electricity}}

== Open access pilot and demo facility providers ==
[[File:Pilots4U Database Logo 0.png|thumb]]
Here we make the link to the Europe-wide network & database of open access multipurpose pilot and demo infrastructures for the European bio-economy.

If you are looking for shared facilities that exist for the technology of anaerobic digestion, here is the link to the selection from the Pilots4U database : [https://biopilots4u.eu/database?field_technology_area_data_target_id=101&field_contact_address_value_country_code=All&field_scale_value=All&combine=&combine_1= Pilots4U Database]

== Patents ==
Currently no patents have been identified.

== References ==
<references />

[[Category:Conversion]]
[[Category:Technologies]]

Anaerobic digestion

2022-07-04T13:39:30Z

Nathan Deman: Extra information about the company & process

{{Infobox technology|Name=Anaerobic digestion|Category=[[Conversion]] ([[Conversion#Biochemical_processes_and_technologies|Biochemical processes and technologies]])|Feedstock=[[Biowaste]] in general, [[Food waste]], [[Garden and park waste]] (wood, leaves)|Product=Biogas and digestate}}
<onlyinclude>'''Anaerobic digestion''' is a process through which micro-organisms break down organic matter, such as animal manure, wastewater biosolids, and food wastes, in the absence of oxygen. Anaerobic digestion intended for biogas production takes place in a sealed tank (called an anaerobic digester), which is designed and constructed in various shapes and sizes specific to the site and feedstock conditions. These sealed vessels contain complex microbial communities that break down the waste and produce biogas and digestate (i.e., the solid and liquid material end-products of the process). The biogas can be used as a source of energy. The remaining digestate can be used as a fertiliser, or it can be post-treated according to its intended use, e.g. by drying or composting to use it as a soil improvement agent.</onlyinclude>

== Feedstock ==
=== Origin and composition ===
Multiple organic materials can be combined in one digester, a practice called co-digestion. Co-digested materials include, amongst others, manure, food waste, energy crops, crop residues, and fats, oils, and greases (FOG) from restaurant grease traps.

=== Pre-treatment ===
Biomass is first separated from impurities as stones and glass. An agitator provides a good mixing between different biomass types to avoid strong changes in composition. The feed is a stirrable mixture and the dry matter content may be a maximum of 15-20% of the slurry. Co-substrates are often reduced in size by shredding before they are fed in order to make the contact surface of the biomass as large as possible.

For residual flows from the food industry, crop residues and manure, thermal and chemical pre-treatments are mainly applied. The most important effects of thermal pre-treatment are: reducing particle size, increasing solubility and improve the biodegradability. Additional advantages of thermal pre-treatment are: (1) higher loading of the digester is possible, (2) lower viscosity of the treated material which results in lower energy input for mixing the digester, (3) improved dewaterability of digestate and (4) sanitised product.

The following pre-treatments may be considered :

* [[Particle filtering]]
* [[Sizing]] (e.g. chipping, grinding)
* Thermal pre-treatment

== Process and technologies ==
=== Process ===
There are three basic anaerobic digestion processes, namely psychrophilic, mesophilic, and thermophilic, which take place over different temperature ranges. Psychrophilic digestion is a low temperature (<20°C) process. Mesophilic digestion takes place between 20 and 45°C, which can take a month or two to complete, and thermophilic digestion between 45 and 65°C, which is faster, but its micro-organisms are more sensitive. The majority of the agricultural biogas plants are operated at mesophilic temperatures. Thermophilic temperatures are applied mainly in large-scale centralised biogas plants with co-digestion<ref>{{Cite web|year=2021|title=Anaerobic digestion|e-pub date=2021|date accessed=6/9/2021|url=https://www.eubia.org/cms/wiki-biomass/anaerobic-digestion/}}</ref>. The process of anaerobic digestion takes place through four successive stages: hydrolysis, fermentation, acetogenesis, and methanogenesis.<ref>{{Cite journal|author=Junye Wang|year=2014|title=Decentralized biogas technology of anaerobic digestion and farm ecosystem: opportunities and challenges|journal=Fronties in Energy Research|volume=2|page=|doi=10.3389/fenrg.2014.00010}}</ref> In the hydrolysis step, the feedstock is broken down into soluble substrates (e.g., sugar and amino acids) by enzymes. Fermentation involves the conversion of sugar, amino acids, and fatty acids into ammonia, organic acids, hydrogen (H2) and CO2. In the acetogenesis step, volatile fatty acids are broken down into acetic acids, CO2 and H2. Finally, methanogenesis step converts acetate, formaldeyde, and H2 to CH4 and water<ref>{{Cite journal|author=Jay N. Meegoda, Brian Li, Kush Patel, Lily B. Wang|year=2018|title=A review of the Processes, Parameters, and Optimization of Anaerobic Digestion|journal=International Journal of Environmental Research and Public Health|volume=15|page=|doi=10.3390/ijerph15102224}}</ref>.
[[File:Anaerobic stages.png|thumb|Simplified scheme of pathways in anaerobic digestion (not own work)]]

Usually, the produced biogas must be dried and drained for condense water and biological or chemical cleaned for H2S, NH3 and trace elements. Further upgrading of the biogas to increase the CH4 content could be realized by membrane separation of CO2 and pressurising the biogas.
== Product ==
Anaerobic digestion produces two valuable outputs, namely biogas and digestate. Biogas is composed of methane (CH4), which is the primary component of natural gas, at a relatively high percentage (50 to 75%), carbon dioxide (CO2), hydrogen sulfide (H2S), water vapor, and trace amounts of other gases. The energy in biogas can be used like natural gas to provide heat, generate electricity, and power cooling systems. Biogas can also be purified by removing the inert or low-value constituents (CO2, water, H2S, etc.) to generate renewable natural gas (RNG). This can be sold and injected into the natural gas distribution system, compressed and used as vehicle fuel, or processed further to generate alternative transportation fuel or other advanced biochemicals and bioproducts.

The digestate can be used in many beneficial applications provided that is is appropriately treated post processing. This could be in form of animal bedding, nutreint-rich fertilizer, organic-rich compost, or as soil amendment.

=== Post-treatment ===
The remaining digestate can be post-treated according to its intended use, e.g. by drying or composting to use it as a soil improvement agent.

== Technology providers ==
{| class="wikitable sortable mw-collapsible mw-collapsed"
|+'''Technology comparison'''
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Company name
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Country
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Technology category
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Technology name
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| TRL
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Capacity [kg/h]
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Processable mass [kg]
! class="cd-text-darkgreen" style="vertical-align:{{{va|bottom}}}"| Temperature [°C]
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Feedstock: Food waste
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Feedstock: Garden & park waste
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Product: biogas
! class="cd-text-darkgreen" style="{{writing-mode|s2}};vertical-align:{{{va|bottom}}}"| Product: Renewable natrual gas (RNG)
|-
! style="height:1.8em;"|
!
!
!
!
!
!
!
!
!
!
!
|-
| [[Help:Article content of technology pages#Company_1|Company 1]]
| [Country HQ location]
| [Technology category (if different sub-categories are defined this has to be specified here, the available categories can be found on each technology page under the chapter [[Help:Article content of technology pages#Process_and_technologies|Process and technologies]])]
| [Technology name (the "branded name" or the usual naming from company side)]
| [4-9]
| [numeric value]
|
|
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
|-
| [[Help:Article content of technology pages#Company_2|Company 2]]
| [Country HQ location]
| [(if different sub-categories are defined this has to be specified here, the available categories can be found on each technology page under the chapter [[Help:Article content of technology pages#Process_and_technologies|Process and technologies]])]
| [Technology name (the "branded name" or the usual naming from company side)]
| [4-9]
| [numeric value]
|
|
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
| class="cd-background-lightgreen cd-text-darkgreen" style="text-align:center" |●
|}
=== Biogas Plus ===
{{Infobox provider-anaerobic digestion|Company=Biogas Plus|Webpage=https://www.biogasplus.nl|Country=Venray (NL)|Reactor=Complete mix digester|Capacity=18.000 tons (input), 320.000 Nm3 green gas/year (output).|Feedstock=Animal Manure|Product=Green gas|TRL=9|Technology name=Compact Plus}}

=== BioRenGaz ===
{{Infobox provider-anaerobic digestion|Company=BioRenGaz|Country=France|Webpage=https://www.biorengaz.com/|Contact=contact@biorengaz.com|Image=BioRenGaz_icone.png|TRL=7|Technology name=Bioreactor}}

BioRenGaz has developed a new patented anaerobic digestion technology that is 4 times more efficient and much more compact than conventional biogas plants thanks to vertical silo design. The anaerobic filter uses a recycled and 100% renewable packing material to replace costly and polluting plastic packing. This medium provides an ecological habitat for the bacteria and enhances their performance. The solution is adapted for the treatment of liquid effluents and the great advantage, unlike other technologies, is that it can also valorize pulpy effluents like biowaste pulp. The bioreactors have lower operational costs and increased energy production by keeping the micro-organisms on the packing material, which allows producing 10% more biogas. The system is modular, so bioreactors can be built from a small scale and easily be expanded as needed. The Solution aims for the optimization of the economic and environmental model of energy and agronomic recovery of biowaste.

=== CCS ===
CCS Enegie-advies together with Greenmac developed the Bio-UP technology which is able to upgrade the produced biogas into green gas. CCS offers the Bio-UP technology via lease contracts or turn-key. The Bio-UP is a proven concept which already operates at "melkveeproefbedrijf De Marke".

=== Dranco ===
DRANCO nv has developed innovative and patented designs for biogas plants, with a pretreatment, digester concept and post-treatment adapted to each type of feedstock. Find out about our 30+ years of experience and our 35 references!

https://dranco.be/

{{Infobox provider-anaerobic digestion|Company=DRANCO nv|Country=Belgium|Contact=Bruno Mattheeuws (bm@dranco.be)|Webpage=www.dranco.be|TRL=Successful Deployment|Technology name=DRANCO Dry anaerobic digestion|Capacity=>5000|Feedstock=biowaste, SSO, MSW, residual waste, ...|Reactor=2500-5000m³}}

=== Envitec ===

=== Fiberight ===

=== Host ===

=== Planet Biogas ===
{{Infobox provider-anaerobic digestion|Company=PlanEt Biogas Group GmbH|Webpage=https://www.planet-biogas.com|Country=Vreden (DE)|Technology name=PlanET|TRL=9|Reactor=Complete mix digester (modular)|Feedstock=Animal manure, biogenic waste materials|Product=Green gas, heat & electricity}}

== Open access pilot and demo facility providers ==
[[File:Pilots4U Database Logo 0.png|thumb]]
Here we make the link to the Europe-wide network & database of open access multipurpose pilot and demo infrastructures for the European bio-economy.

If you are looking for shared facilities that exist for the technology of anaerobic digestion, here is the link to the selection from the Pilots4U database : [https://biopilots4u.eu/database?field_technology_area_data_target_id=101&field_contact_address_value_country_code=All&field_scale_value=All&combine=&combine_1= Pilots4U Database]

== Patents ==
Currently no patents have been identified.

== References ==
<references />

[[Category:Conversion]]
[[Category:Technologies]]