Anaerobic Digestion - Revision history

Raymond RedCorn at 04:24, 28 February 2019

2019-02-28T04:24:46Z

Raymond RedCorn: /* Importance */

2018-11-08T08:59:23Z

Importance

Raymond RedCorn at 08:59, 8 November 2018

2018-11-08T08:59:07Z

Raymond RedCorn: /* Instances of the System */

2018-11-08T07:41:08Z

Instances of the System

Raymond RedCorn: /* Instances of the System */

2018-11-08T07:38:10Z

Instances of the System

Raymond RedCorn at 07:37, 8 November 2018

2018-11-08T07:37:40Z

Raymond RedCorn: /* Know Failures and Solutions */

2018-11-08T07:34:30Z

Know Failures and Solutions

Raymond RedCorn: /* Maintenance Schedule */

2018-11-08T07:34:14Z

Maintenance Schedule

Raymond RedCorn at 07:33, 8 November 2018

2018-11-08T07:33:13Z

Raymond RedCorn at 15:11, 7 November 2018

2018-11-07T15:11:49Z

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 Three different temperature ranges are ideal for anaerobic digestion.  Each temperature range selects for a different set of organisms that carry out the process. These temperatures represent local optimums, however biogas can be successfully produced outside these ranges and the rates of organic matter degredation and biogas production generally increase with increasing temperature.
-'''Psycrophilic digestion''' 15°C (59°F) <br/>
+'''Psycrophilic digestion''' 15°C (59°F) <br />
-'''Mesophilic Digestion''' 30-38°C (85-100°F) <br/>
+'''Mesophilic Digestion''' 30-38°C (85-100°F) <br />
-'''Thermophilic digestion''' 50 to 57°C (122-135°F) <br/>
+'''Thermophilic digestion''' 50 to 57°C (122-135°F) <br />
 Psyochrophilic and mesophilic digestion are commonly used at the building scale level, while mesophilic and thermophilic is typically operated at large scale facilities.
@@ Line 27: / Line 27: @@
 {| class="wikitable sortable"
 |-
-! rowspan ="2"|Condition
+! rowspan="2" |Condition
-! colspan = "3"|Optimum
+! colspan="3" |Optimum
-! rowspan ="2"|Operating Range
+! rowspan="2" |Operating Range
-! rowspan ="2"|Unit
+! rowspan="2" |Unit
-! rowspan ="2"|Notes
+! rowspan="2" |Notes
 |-
 !Psycrophilic !! Mesophilic !! Thermophilic
 |-
 | Temperature
-| style="text-align:right;"| 15
+| style="text-align:right;" | 15
-| style="text-align:right;"| 30-38
+| style="text-align:right;" | 30-38
-| style="text-align:right;"| 50-57
+| style="text-align:right;" | 50-57
-| style="text-align:right;"| 15-57
+| style="text-align:right;" | 15-57
 | °C
 | NA
 |-
 | pH
-| colspan = "3" style="text-align:center;" | 7
+| colspan="3" style="text-align:center;" | 7
 | -
 | -
@@ Line 100: / Line 100: @@
 | low gas production
 | high ammonia
-| Ammonia can penetrate the cell walls of methanogens and inactivate the organisms
+| Ammonia can penetrate the cell walls of methanogens and inactivate the organisms<ref>{{Cite journal|last=Chen|first=Ye|last2=Cheng|first2=Jay J.|last3=Creamer|first3=Kurt S.|date=2008-07-01|title=Inhibition of anaerobic digestion process: A review|url=https://www.sciencedirect.com/science/article/pii/S0960852407001563|journal=Bioresource Technology|language=en|volume=99|issue=10|pages=4044–4064|doi=10.1016/j.biortech.2007.01.057|issn=0960-8524}}</ref>
 | Reduce inputs until symptoms relieve, dilute with water, or add buffers like CaCO3
 |-

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 '''This system is also called:''' AD, Digestion,
 =Importance=
-<--Relay any broader impact-->
+<!--Relay any broader impact-->
 =Principles of Operation=

← Older revision		Revision as of 08:59, 8 November 2018
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	'''This system is also called:''' AD, Digestion,		'''This system is also called:''' AD, Digestion,
		+	=Importance=
		+	<--Relay any broader impact-->

	=Principles of Operation=		=Principles of Operation=

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 <!--This only applies to generalized systems (those that do not have a make, model, or serial number).  Delete section for specific systems -->
 {| class="wikitable sortable"
 |-

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 |-
-| [[https://homebiogas.com/ | Home Biogas]]
+| [https://homebiogas.com/ Home Biogas]
 | 2.0
 | October 2018

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 |}
-==Know Failures and Solutions==
+==Failures and Solutions==
 <!--Historical significance of a failure is better suited for Wikipedia or other sites.  You are encouraged to link out to these sites from this section -->

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 |-
 | Residence Time of 28 days
-| Remove Liquid
+| Remove Solids
 | Operator
 | N/A

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 <!-- Only briefly state anything that the StemNode Diagrams can cover within subsystems.  This section is often omitted for specific systems (manuals on a specific make, model, or serial number) -->
-Anaerobic digestion is the conversion of organic matter to biogas which is flammable if the methane content of the biogas is high enough.  Bacteria and Archea that perform the individual stages of anaerobic digestion are naturally present in the feces and organic matter that enter the digester or can be introduced from an already functioning digester.  The conditions within the digester can select for which organisms will perform best.
+Anaerobic digestion is the conversion of organic matter to biogas which is flammable if the methane content of the biogas is high enough.  Bacteria and Archea that perform the individual stages of anaerobic digestion are naturally present in the feces and organic matter that enter the digester or can be introduced from an already functioning digester.  The conditions within the digester can determine which organisms proliferate.
-The subprocesses of anaerobic digestion are degredation, hydrolysis, acidogenesis, acetogenesis, methanogenesis.  Of these, hydrolysis is often the rate limiting step followed by methanogenesis. Typically all subprocesses are carried out concurrently in a single vessel, however large scale facilities are increasingly splitting up the processes in order to provide conditions optimal for each sub-process. For example it is advantageous to split up the acid forming phases (called acid-phase digestion) from the methanogenesis phase because it allows for an overall reduction in reactor volume needed although it increases complexity See [[#Modes of Operation|Modes of Operation]].
+The subprocesses of anaerobic digestion are degredation, hydrolysis, acidogenesis, acetogenesis, and methanogenesis.  Of these, hydrolysis is often the rate limiting step followed by methanogenesis. Typically all subprocesses are carried out concurrently in a single vessel, however large scale facilities are increasingly splitting up the processes in order to provide conditions optimal for each sub-process. For example it is advantageous to split up the acid forming phases (called acid-phase digestion) from the methanogenesis phase because it allows for an overall reduction in reactor volume needed although it increases complexity (See [[#Modes of Operation|Modes of Operation]]).
 ==Modes of Operation==

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 {{Template:CiteAuthors}}
-'''This system is also called:'''AD, Digestion,
+'''This system is also called:''' AD, Digestion,
 =Principles of Operation=