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Journal articles
Open Access
Thickness variation in coextruded layers - effect of polymer viscoelasticity on layer uniformity, TAPPI JOURNAL, April 1996, Vol. 79(4)

Thickness variation in coextruded layers - effect of polymer viscoelasticity on layer uniformity, TAPPI JOURNAL, April 1996, Vol. 79(4)

Journal articles
Open Access
TAPPI 96 and New Orleans a great combination for a great impression, TAPPI JOURNAL, April 1996, Vol. 79(4)

TAPPI 96 and new orleans a great combination for a great impression, TAPPI JOURNAL, April 1996, Vol. 79(4)

Journal articles
Open Access
D100-stage bleaching control with fuzzy logic, TAPPI JOURNAL, April 1996, Vol. 79(4)

D100-stage bleaching control with fuzzy logic, TAPPI JOURNAL, April 1996, Vol. 79(4)

Journal articles
Open Access
Remote inspection of wood with lock-In-thermography, TAPPI JOURNAL, August 1996, Vol.79(8)

Remote inspection of wood with lock-In-thermography, TAPPI JOURNAL, August 1996, Vol.79(8)

Journal articles
Open Access
1996 International Environmental Conference and Exhibit demonstrates continuing high industry interest in environmental matters, TAPPI JOURNAL, August 1996, Vol.79(8)

1996 international environmental conference and exhibit demonstrates continuing high industry interest in environmental matters, TAPPI JOURNAL, August 1996, Vol.79(8)

Journal articles
Open Access
The role of engineering in water conservation, TAPPI JOURNAL, December 1996, Vol. 79(12)

The role of engineering in water conservation, TAPPI JOURNAL, December 1996, Vol. 79(12)

Journal articles
Magazine articles
Open Access
A case study review of wood ash land application programs in North America, TAPPI Journal February 2021

ABSTRACT: Several regulatory agencies and universities have published guidelines addressing the use of wood ash as liming material for agricultural land and as a soil amendment and fertilizer. This paper summarizes the experiences collected from several forest products facility-sponsored agricultural application programs across North America. These case studies are characterized in terms of the quality of the wood ash involved in the agricultural application, approval requirements, recommended management practices, agricultural benefits of wood ash, and challenges confronted by ash generators and farmers during storage, handling, and land application of wood ash.Reported benefits associated with land-applying wood ash include increasing the pH of acidic soils, improving soil quality, and increasing crop yields. Farmers apply wood ash on their land because in addition to its liming value, it has been shown to effectively fertilize the soil while maintaining soil pH at a level that is optimal for plant growth. Given the content of calcium, potassium, and magnesium that wood ash supplies to the soil, wood ash also improves soil tilth. Wood ash has also proven to be a cost-effective alternative to agricultural lime, especially in rural areas where access to commercial agricultural lime is limited. Some of the challenges identified in the review of case studies include lengthy application approvals in some jurisdictions; weather-related issues associated with delivery, storage, and application of wood ash; maintaining consistent ash quality; inaccurate assessment of required ash testing; potential increased equipment maintenance; and misconceptions on the part of some farmers and government agencies regarding the effect and efficacy of wood ash on soil quality and crop productivity.

Journal articles
Magazine articles
Open Access
Continuous tannin extraction by use of screw reactor, TAPPI Journal February 2021

ABSTRACT: A pilot-size screw reactor (extraction unit) was used for tannin extraction of spruce. Yield of the same magnitude or better was obtained when comparing a screw reactor with batch reactors. A longer presoaking time in water seemed to be better than a short one for obtaining higher yield. A higher yield is obtained with lower dry-water ratio, which suggests that the internal diffusion in bark does not determine mass transfer as much as is the case without presoaking of bark. The higher dry-water ratio decreased the yield. The prior soaking of the bark also minimized the mechanical reactor feeding problems (clogging). The benefits of a screw reactor likely are that run time changes for different process conditions are flexible; it simplifies design and construction of an industrial unit for tannin production; and it saves space because of the need for fewer and smaller intermediate storage tanks.

Journal articles
Open Access
Color removal from kraft bleach-plant effluents by trichoderma sp., TAPPI JOURNAL, January 1991, Vol. 74(1)

Color removal from kraft bleach-plant effluents by trichoderma sp., TAPPI JOURNAL, January 1991, Vol. 74(1)

Journal articles
Open Access
Bleaching deinked pulps, TAPPI JOURNAL, January 1991, Vol. 74(1)

Bleaching deinked pulps, TAPPI JOURNAL, January 1991, Vol. 74(1)

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