3506 



Chapter 28 



CORD OF ROUGH 

 OAK BOLTS, . 

 3,340 POUNDS 

 (O.D. WEIGHT) 



UNSANDEO 

 FURNITURE 

 CUTTINGS 

 704 



SAWDUST a TRIM. DRY 

 1.267 



SAWDUST. GREEN 

 634 



FUEL 

 2,636 



BARK AND SLABS. GREEN 

 735 



TOTAL 



3.340 POUNDS 



Figure 28-4. — Materials balance, ovendry-weight basis, for Marimont's bolter mill op- 

 eration. Output averages about 7 Mbf of lumber per 8-hour shift. About 500 board 

 feet of 5/4 lumber can be sawn from a cord of oak and hickory bolts, so daily wood 

 usage is about 1 4 cords. The lumber is first air dried, then kiln dried, before delivery to 

 the furniture plant for processing into cuttings. (Drawing after Smith 1981.) 



28-5 $292,550— SMALL-SCALE PRODUCTION OF 

 ETHANOL AND FURFURAL' 



This projected enterprise for small-scale production of fuel and alcohol from 

 pine-site hardwoods is owner-operated. The setting contemplated is in north 

 Arkansas where a farmer owns 125 acres of oak, hickory, and sweetgum. He 

 annually can harvest 250 tons of wood (ovendry basis) from his acreage and can 

 also purchase additional tonnage from his neighbors paying a stumpage price of 

 $15 per ton, ovendry basis. 



The enterprise is projected to consume about 780 tons of wood (ovendry 

 basis) annually to yield 19,500 gallons of 95-percent ethanol, 27,000 pounds of 

 yeast, and 63,500 pounds of furfural. In the processing system, 64 percent of the 

 wood feed is used to produce wood sugars by dilute acid hydrolysis (fig. 28-5 

 top). A continuous fermentation scheme is employed to convert hexose sugars to 



^Abstracted from Karchesy (1981). 



