Converting Waste Agricultural Biomass into a Resource - UNEP

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B. Major Waste Biomass Conversion Routes: Acharya, on the initiatives of ADB on using waste biomass 10 , presented major waste biomass conversion routes to energy in a flowchart. Based on Acharya’s Biomass Conversion Routes, the following flowchart was designed to include conversion technologies applicable only to agricultural biomass wastes. The flowchart, which does not include routes for energy crops and animal husbandry wastes, summarizes the entries on technology conversion for energy in the Compendium. Mapping out conversion processes down to energy products, the flowchart provides a useful guide to end-users on which technology to consider given their energy product requirement. Chart I: Conversion Routes for Cellulosic Agricultural Biomass Waste Thermo-chemical Conversion Combustion Gasification Pyrolysis Liquefaction Biochemical Conversion Fermentation Steam Gas Gas Oil Charcoal Steam Gas turbine, Methanol/ Upgrading Distillation Turbine combined hydrocarbons/ cycle engine synthesis fuel cell Diesel Ethanol Heat Electricity Fuels C. Conversion to energy Expanding the conversion routes to include the kind of biomass waste and the specific energy product generated, Table 1 is produced to sum up entries for Part I of the Compendium. 10 ADB’s Initiatives on Using Waste Biomass: Agricultural Waste Utilization Project in PRC, presented during the UNEP-DAP International Expert Group Workshop on Compendium of EST for Converting Waste Biomass into a Resource on Nov.13-14, 2007, at the Astoria Plaza, Pasig City, Philippines by Mr. Jiwan Acharya, of the Energy, Transport, and Water Division of the Asian Development Bank 14
Table 1: Cellulosic Waste Biomass Conversion to Energy Technology Conversion Process Type Biomass Waste Energy or Fuel Produced Biodiesel Production Chemical rapeseed soy beans waste vegetable oil biodiesel Direct Combustion Thermochemical agricultural waste mixed waste heat steam electricity Ethanol Production Biochemical (aerobic) sugar or starch crops wood waste pulp sludge rice and corn straw ethanol Gasification Thermochemical agricultural waste mixed waste low or medium- Btu producer gas Methanol Production Thermochemical agricultural waste mixed waste methanol Pyrolysis Thermochemical agricultural waste municipal solid waste synthetic fuel oil (biocrude) charcoal Chart 2: Level of Use for Energy Conversion Gasification Pyrolysis Bio-oil applications Bio-chemicals Household energy Briquetting Carbonization Combustion Research Pilot Demonstration Commercial Chart 2 shows the level of use of the different conversion technologies for energy. Household energy, mainly for cooking, heating and drying, are the most widely available technologies. Biomass cook stoves, for instance, have hundreds of versions all around the world. Those documented in the 15
Page 1 and 2: Con v e r t i n g Wa s t e Agr i c
Page 3 and 4: Converting Waste Agricultural Bioma
Page 5 and 6: setting and identification of stake
Page 7 and 8: ACRONYMS CO2 CV DAP DTIE ESTs E-Was
Page 9 and 10: 2. Rationale One of the critical ac
Page 11 and 12: 3. Scope and Limitations In compili
Page 13 and 14: 4. The Compendium The Project Websi
Page 15: • Basic technology information 9
Page 19 and 20: Molding Oil Palm fruit residues Sug
Page 21 and 22: 6. Recommendations The specific rec
Page 23 and 24: 2-Drum Top Supported Boiler 12 USA,
Page 25 and 26: HYBRID PF 14 USA, Commercial Crop R
Page 27 and 28: operation of each to match the stea
Page 29 and 30: HYBRID RG 15 USA, Commercial Crop R
Page 31 and 32: All above work in concert to reduce
Page 33 and 34: HYBRID UF 16 USA, Commercial Crop R
Page 35 and 36: operation of each to match the stea
Page 37 and 38: TRI 17 USA, Commercial Crop Residue
Page 39 and 40: 2-Drum Bottom Supported Boiler 18 U
Page 41 and 42: power boilers. Examples of Real Lif
Page 43 and 44: A fully automated continuous system
Page 45 and 46: Detailed Process Description A. Met
Page 47 and 48: Examples of Real Life Applications
Page 49 and 50: Detailed Process Description A. Met
Page 51 and 52: Examples of Real Life Applications
Page 53 and 54: 1. The Fibrowatt operation starts o
Page 55 and 56: HYBRID CG 21 USA, Commercial Crop R
Page 57 and 58: utilizing the most reliable system
Page 59 and 60: BTG Flash Pyrolysis Netherlands, Co
Page 61 and 62: Before processing organic materials
Page 63 and 64: a. Reactor : This was a downdraft,
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Examples of Real Life Applications
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Price of Machine The total investme
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Main Products: The plant provides i
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Disadvantages to Developing Countri
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Detailed Process Description Kakira
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Example of Real Life Applications C
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Aqueous Phase Reforming (APR) 27 US
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Shelled Corn as Fuel 29 USA, Commer
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Amaizablaze/Nesco, Inc. P. O. Box 3
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HS-Tarm 5 Main Street, P.O. Box 285
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Lock Haven, PA 17745 800-582-4317 h
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P.O. Box 2075, Mankato, MN 56002 80
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The result is wood (biomass) can be
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Biomass Heating System 35 UK, Comme
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Supplier R.D. Associates, Ltd. Fuel
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Figure 5: KSM Drop Cell Unit Some o
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There is a tendency for fly ash to
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AgriPower 36 USA, Commercial Crop R
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BioMax 25 37 USA, Commercial Crop R
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102
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Solar-Biomass Hybrid Cabinet Dryer
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Two doors were designed for easy lo
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Asbestos gaskets are used while con
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The ash scraper slides through a cy
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flange attached at its bottom; this
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Other fuels such as saw dust brique
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The completed hybrid solar-biomass
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Greenfire 41 USA, Commercial Crop R
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Mayon Turbo Stove and Lo Trau Stove
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Social Considerations The stove was
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Commercial Gasifier 49 Philippines,
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The Modul-Pak ® boiler is a hybrid
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Suppliers Energy Quest, Inc. 850 So
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as well as the extraction, recovery
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oil production period in the mills.
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weatherproof and sound-attenuating
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Primenergy R-18 Gasifier producing
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Low-cost 500 kW thermal rice hull c
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Kansai Carbonized Rice Husk Gasifie
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Colusa Rice Straw / Hulls Technolog
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The customized harvester collects t
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Rice Husk Gasifier Philippines, Com
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2.5 MW Cogeneration Plant 65 Thaila
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San San Rice Husk Stove Myanmar, Co
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The technology of rice husk gasifie
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of trees can be controlled. This wo
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includes an automatic feeder, which
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Maligaya Rice Hull Stove 74 Philipp
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Parameters for Procurement Specific
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162
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a 100KW capacity Rice-Husk based Ga
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Rice husk briquette fuel 84 Banglad
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aised to US$ 6.84 million from the
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ease of removal of the char, a grat
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The rice husk gas burner for bakery
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Engineering and Environmental Manag
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Depending on the type of fuel it ha
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mode, all of the steam directed to
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pyrolysis) with air or oxygen at te
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R S for in-kind repair of boilers a
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Wood Biomass Electricity Generator
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Advantages to Developing Countries
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Celunol's "wet" biomass conversion
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up to 1.3 million liters of cellulo
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This process is done in shredder ma
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The minimal price established is $C
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196
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Telephone (303) 933-3135 FAX (303)
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Solar-Biomass Hybrid Cabinet Dryer
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The stove uses cylindrical honeycom
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Research Centre for Applied Science
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air. Woody biomass available in ple
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Dry Grind Ethanol 99 USA, Under Con
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Price Ethanol sells as a commodity
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1 Figure 1. Design of the dryer Det
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footings made of brick and mortar.
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placed inside mild steel shell of l
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Biological Hydrogen Production from
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ioprocess for hydrogen production f
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a. Reactor: This was a downdraft, t
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Transpired Collector Solar-Biomass
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Drying chamber The drying chamber c
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Annexure 3 EST for Energy Conversio
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Detailed Process Description Figure
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Forest Products Research and Develo
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Advanced Gasification-Combustion (A
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Wood wool cement board (WWCB) Cemen
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Furnace-Type Lumber Dryer 105 Phili
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(i) Charring Drum. The charring dru
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The mould set is filled with the mi
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Solar Collector The solar collector
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Fluidized Bed Combustor for Steam G
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Small-Scale Biomass Pyrolyzer for F
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chips) aside from palay and allows
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Detailed Process Description There
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The IRRI DR-1 Batch Dryer 117 Phili
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Rice Hull Furnace attached to a blo
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was not continuously discharged fro
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Detailed Process Description Drying
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Rice Hull Ash Cement (RHAC) Hollow
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Annexure 4 EST for Material Convers
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Through a joint venture component m
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Abaca Mechanical Tuxer 129 Philippi
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Economic instruments for overcoming
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Figure 2. Fiber Twisting Machine
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Example of Real Life Applications C
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Main Products: Cellulosic Ethanol O
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converted to a high-carbon char mat
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NovaGreen Biomass Ethanol Separatio
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Advantages to Developing Countries
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Detailed Process Description 133 On
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286
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agricultural waste could theoretica
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downstream value-added products whe
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Bio-Enriched Method (Trichoderma an
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Increases yield. Improves water-hol
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Environmental Considerations 141 Co
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298
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150 150 http://www.kinseiseishi.co.
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152 Type of non-woven materials Che
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Bale as feedstock USA, Commercial C
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Price of Machine : refer to the tab
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2. Cooking the Fiber: A rope is lai
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9. Weaving: Water is sprayed on the
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Decorticating Machine and Motorised
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usually contains two spindles set i
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tradition and, moreover, the range
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318
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Over 3.5 million coconut farmers ar
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The blades also propel coir fibre t
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Economic instruments for overcoming
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first using the drum method or the
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Job Potential: Farmers' cooperative
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Soundproofing and Insulating Materi
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The environmental impact is signifi
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. Suppliers K.E.F.I. - Kenaf Eco Fi
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Detailed Process Descriptions: 1. H
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Examples of Real Life Applications
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In a two-stage setup, the target wi
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companies with expertise in this we
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Mezcal Production from Maguey Phili
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5. Crushing the agave. The roasted
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Method of Propagation Applying fert
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Main Products 198 Abaca fiber comes
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Being a high-priced fabric has prac
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Detailed Process Description 202 Me
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Rice Husk basket Burner India, Comm
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The ash should be white or grey wit
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Paper from Rice Straw Cyprus, Comme
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1. Vatting - Fill your vat halfway
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Ethanol Production by Acid Hydrolys
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improvements would provide cost sav
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Detailed Process Description 7. Ric
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Plywood from Sorghum China, Commerc
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Example of Real Life Applications L
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Figure 1. Schematic of gasifier-pow
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hull is a processing by-product of
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The size of the mill or number of m
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Figure 3. A 12-ft continuous evapor
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The finished syrup is thoroughly st
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Drinking Vinegar from Sweet Sorghum
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only four months. Ethanol, a cheape
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Davis & Standard Twin Screw Extrude
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Environmental and Social Considerat
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Detailed Process Description Figure
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operational analysis be carried out
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Figure 2. Hopper or Feeder The comp
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Broin Fractionation (BFRAC) 218 USA
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Collaboration with other companies
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NET INCOME Before Tax = 237, 600 -
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Cornstalk Flash Volatilization USA,
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Decentralized Wastewater Treatment
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degrades the wastes. The algal pond
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Job Potential: 231 Preparing the so
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Operations and Maintenance Requirem
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Detailed Process Description There
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Biochar 237 USA, Research Crop Resi
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422
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424
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Detailed Process Description: 241 2
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In addition to functioning as a thi
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The underflow from the first stage
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y essentially dry process technique
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industrial uses. It consists of mol
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yeast for high alcohol, and high-te
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About the UNEP Division of Technolo
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Converting Waste Agricultural Biomass into a Resource - UNEP

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