For the case study the technical system boundaries were structured in five production phases:
1 Primary production of biomass in SRC plantations;
2 Harvesting and subsequent primary transport of the biomass from in-field to the roadside;
3 Pretreatment of the biomass, including comminution, drying and mobile fast pyrolysis;
4 Secondary transport of the bioenergy feedstock from the roadside to a central conversion plant; and
5 Further processing of the feedstock and its conversion into electricity.
This resulted in a set of 37 lignocellulosic bioenergy systems, which are characterised by different combinations of the production phases (Table 11.2). A general description of each module of the five production phases is given in the life-cycle inventory below (Von Doderer 2012). Best operating practices (BOP) are assumed for all activities/processes throughout the life-cycle.
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Table 11.2 Overview of CWDM bioenergy pathways leading to a set of 37 lignocellulosic bioenergy systems
Central conversion
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Plantation
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Roadside Road
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site
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LBS
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|
Primary Pro-
|
Motor-Manual
|
Extraction with
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Mobile Chipping Transport of Comminuted Biomass
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Direct Combustion of Biomass
|
01
|
|
duction of
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Harvesting
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forestry
|
of Biomass
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Direct Gasification of Biomass
|
02
|
|
Biomass
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(whole tree)
|
machinery
|
|
Central Pyrolysis + Conversion
|
03
|
|
|
(whole tree)
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Mobile Pyrolysis Transport of
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Combustion of Pyrolysis Products
|
04
|
|
|
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Mobile
|
Bio-Oil in Gas Turbine/Bio-Char sold
|
05
|
|
|
|
Pyrolysis
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to Industry
|
|
|
|
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Products
|
|
|
|
|
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Transport of Uncomminuted Biomass
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Stationary Direct Combustion
|
06
|
|
|
|
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Chipping at of Biomass
|
|
|
|
|
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Landing Direct Gasification
|
07
|
|
|
|
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of Biomass
|
|
|
|
|
|
Central Pyroly-
|
08
|
|
|
|
|
sis + Conversion
|
|
|
Motor-Manual
|
Extraction with
|
Mobile Chipping Transport of Comminuted Biomass
|
Direct Combustion of Biomass
|
09
|
|
Harvesting
|
agricultural
|
of Biomass
|
Direct Gasification of Biomass
|
10
|
|
(log)
|
machinery
|
|
Central Pyrolysis + Conversion
|
11
|
|
|
(manual
|
Mobile Pyrolysis Transport of
|
Combustion of Pyrolysis Products
|
12
|
|
|
loading of
|
Mobile
|
Bio-Oil in Gas Turbine/Bio-Char sold
|
13
|
|
|
logs)
|
Pyrolysis
|
to Industry
|
|
|
|
|
Products
|
|
|
|
|
|
Transport of Uncomminuted Biomass
|
Stationary Direct Combustion
|
14
|
|
|
|
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Chipping at of Biomass
|
|
|
|
|
|
Landing Direct Gasification
|
15
|
|
|
|
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of Biomass
|
|
|
|
|
|
Central Pyroly-
|
16
|
sis + Conversion
|
|
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Harvesting with Forestry Machinery (whole tree)
|
|
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Extraction with forestry machinery (whole tree)
|
|
 |
 |
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Extraction with agricultural machinery (loading of whole trees with three — wheeler)
|
|
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Harvesting with Agricultural Machinery (whole tree)
|
|
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Extraction with agricultural machinery (whole tree)
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Source: Von Doderer (2012)
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