Converting Waste Agricultural Biomass into a Resource - UNEP

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Figure 3. A 12-ft continuous evaporator and furnace Figure 4. Typical Configuration for Propane Burner Heat Source Detailed Process Description Pre-Heating the Juice Pre-heating the juice prior to evaporating reduces the amount of skimmings left in the juice and lessens the time for cookoff. After the juice has been squeezed from the cane, it can be placed into large stainless steel containers, pre-heated to 160° to 180°F, and allowed to settle for 1 or 2 hours. During this process, many of the impurities in the juice will rise to the top and others will precipitate to the bottom of the tank. The juice is then drawn from about 2 inches above the bottom of the pan (above the settled material) until the skimmings on top of the juice reach that level. Clean out the impurities from the tank, and it is ready to be refilled with fresh juice. 380
The Evaporation Process Evaporating the juice is not difficult, but it must be done intelligently if a good quality syrup is to be produced. As the extracted juice is heated, some undesirable properties in the juice such as proteins and non-sugar substances are coagulated. These coagulated materials (skimmings) will rise to the surface and need to be removed. Continuous flow pans are somewhat more efficient but require more skill in their operation. Regardless of the evaporation method used, the boiling juice must be continuously skimmed to produce high quality syrup. The skimmings are rich in protein and starch as well as some sugar and can be used for animal feed. However, most skimmings are discarded into a waste area or buried. To enable the juice to evaporate uniformly from the pan, you need to control the temperature along the pan’s length. The boiling temperatures of the juice starts about 25 percent of the length of the pan from the juice end and remains at a constant temperature until the skimmings are completely removed before reaching the last 25 percent of the pan. As the syrup density increases, the boiling temperature will rise gradually. Evaporation should be done as rapidly as possible but not so fast that you let the syrup burn. Juice cooked off too fast will be dark and contain small, dark particles of nonremoved impurities. The pan should be at least 1 inch higher at the syrup end than at the juice end. This allows the juice to be about 2 inches deep at the juice end and from 3/4 to 1 inch deep at the syrup end. As the syrup is removed, the juice will push the unfinished syrup toward the finish end to keep the juice from getting too shallow and thus prevent burning. Remove the syrup from the evaporator when it reaches 226° to 230°F (108° to 110°C) or when it reaches a density of 78° to 80° Brix with a syrup hydrometer or sugar refractometer. Inexperienced operators (and sometimes experienced ones) should use a good thermometer to determine when the syrup is finished. Draining off the finished syrup is not especially difficult, but remember that no part of the pan should be dry for more than an instant or the syrup quality may be impaired. The semi-syrup in the center of the pan must be allowed to follow closely behind the syrup being moved to the outlet. As the finished syrup is removed from the pan, it should be cooled and strained before being placed in a large container. Cool the syrup to 140° to 160°F as it is removed from the pan. Some producers pump the finished syrup through a pipeline that passes through an enclosed cool water tank to lower the temperature quickly. A simpler method involves running the syrup down a wide trough for 6 to 10 ft with a cool water jacket beneath the trough. The syrup should then be strained through muslin, two thicknesses of cheesecloth, or 45-mesh screen wire before going into holding containers for canning. Excellent straining cloth may be obtained from any bee or honey supply outlet. This quick cooling maintains the syrup’s more natural color compared to slower cooling methods. 381
Page 1 and 2:
Con v e r t i n g Wa s t e Agr i c
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Converting Waste Agricultural Bioma
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setting and identification of stake
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ACRONYMS CO2 CV DAP DTIE ESTs E-Was
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2. Rationale One of the critical ac
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3. Scope and Limitations In compili
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4. The Compendium The Project Websi
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• Basic technology information 9
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Table 1: Cellulosic Waste Biomass C
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Molding Oil Palm fruit residues Sug
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6. Recommendations The specific rec
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2-Drum Top Supported Boiler 12 USA,
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HYBRID PF 14 USA, Commercial Crop R
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operation of each to match the stea
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HYBRID RG 15 USA, Commercial Crop R
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All above work in concert to reduce
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HYBRID UF 16 USA, Commercial Crop R
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operation of each to match the stea
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TRI 17 USA, Commercial Crop Residue
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2-Drum Bottom Supported Boiler 18 U
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power boilers. Examples of Real Lif
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A fully automated continuous system
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Detailed Process Description A. Met
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Examples of Real Life Applications
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Detailed Process Description A. Met
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1. The Fibrowatt operation starts o
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HYBRID CG 21 USA, Commercial Crop R
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utilizing the most reliable system
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BTG Flash Pyrolysis Netherlands, Co
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Before processing organic materials
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a. Reactor : This was a downdraft,
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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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Page 334 and 335: The environmental impact is signifi
Page 336 and 337: . Suppliers K.E.F.I. - Kenaf Eco Fi
Page 338 and 339: Detailed Process Descriptions: 1. H
Page 340 and 341: Examples of Real Life Applications
Page 342 and 343: In a two-stage setup, the target wi
Page 344 and 345: companies with expertise in this we
Page 346 and 347: Mezcal Production from Maguey Phili
Page 348 and 349: 5. Crushing the agave. The roasted
Page 350 and 351: Method of Propagation Applying fert
Page 352 and 353: Main Products 198 Abaca fiber comes
Page 354 and 355: Being a high-priced fabric has prac
Page 356 and 357: Detailed Process Description 202 Me
Page 358 and 359: Rice Husk basket Burner India, Comm
Page 360 and 361: The ash should be white or grey wit
Page 362 and 363: Paper from Rice Straw Cyprus, Comme
Page 364 and 365: 1. Vatting - Fill your vat halfway
Page 366 and 367: Ethanol Production by Acid Hydrolys
Page 368 and 369: improvements would provide cost sav
Page 370 and 371: Detailed Process Description 7. Ric
Page 372 and 373: Plywood from Sorghum China, Commerc
Page 374 and 375: Example of Real Life Applications L
Page 376 and 377: Figure 1. Schematic of gasifier-pow
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Page 380 and 381: The size of the mill or number of m
Page 384 and 385: The finished syrup is thoroughly st
Page 386 and 387: Drinking Vinegar from Sweet Sorghum
Page 388 and 389: only four months. Ethanol, a cheape
Page 390 and 391: Davis & Standard Twin Screw Extrude
Page 392 and 393: Environmental and Social Considerat
Page 394 and 395: Annexure 5 EST for Material Convers
Page 396 and 397: Detailed Process Description Figure
Page 398 and 399: operational analysis be carried out
Page 400 and 401: Figure 2. Hopper or Feeder The comp
Page 402 and 403: Broin Fractionation (BFRAC) 218 USA
Page 404 and 405: Collaboration with other companies
Page 406 and 407: NET INCOME Before Tax = 237, 600 -
Page 408 and 409: Cornstalk Flash Volatilization USA,
Page 410 and 411: Decentralized Wastewater Treatment
Page 412 and 413: degrades the wastes. The algal pond
Page 414 and 415: Job Potential: 231 Preparing the so
Page 416 and 417: Annexure 6 EST for Material Convers
Page 418 and 419: Operations and Maintenance Requirem
Page 420 and 421: Detailed Process Description There
Page 422 and 423: Biochar 237 USA, Research Crop Resi
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Page 428 and 429: Detailed Process Description: 241 2
Page 430 and 431: 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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