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Journal articles
Magazine articles
Open Access
Addressing production bottlenecks and brownstock washer optimization via a membrane concentration system, TAPPI Journal July 2021

ABSTRACT: Advancements in membrane systems indicate that they will soon be robust enough to concentrate weak black liquor. To date, the economic impact of membrane systems on brownstock washing in kraft mills has not been studied and is necessary to understand the viability of these emerging systems and their best utilization.This study investigated the savings that a membrane system can generate related to brownstock washing. We found that evaporation costs are the primary barrier for mills seeking to increase wash water usage. Without these additional evaporation costs, we showed that our hypothetical 1000 tons/day bleached and brown pulp mills can achieve annual savings of over $1.0 MM when operating at higher dilution factors and fixed pulp production rate. We then investigated the impact of increasing pulp production on mills limited by their equipment. In washer-limited mill examples, we calculated that membrane systems can reduce the annual operating cost for a 7% production increase by 91%. Similarly, in evaporator-limited mill examples, membrane systems can reduce the annual operating cost for a 7% production increase by 86%. These results indicated that membrane systems make a production increase significantly more feasible for these equipment-limited mills.

Journal articles
Open Access
Statistical determination of the effects of enzymes on bleached pulp yield, TAPPI JOURNAL, August 2005, Vol. 4(8) (80 KB)

Statistical determination of the effects of enzymes on bleached pulp yield, TAPPI JOURNAL, August 2005, Vol. 4(8) (80 KB)

Journal articles
Open Access
Environmentally benign psas featured at recycling symposium, TAPPI JOURNAL, February 2000, Vol. 83(2)

Environmentally benign psas featured at recycling symposium, TAPPI JOURNAL, February 2000, Vol. 83(2)

Journal articles
Open Access
Oxalic acid formation during ecf and tcf bleaching of kraft pulp, TAPPI JOURNAL, February 2000, Vol. 83(2)

Oxalic acid formation during ecf and tcf bleaching of kraft pulp, TAPPI JOURNAL, February 2000, Vol. 83(2)

Journal articles
Open Access
A laboratory study of occ flotation for removal of model stickie particles, TAPPI JOURNAL, July 2000, Vol. 83(7)

A laboratory study of occ flotation for removal of model stickie particles, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Addition of sodium silicate and chelant to the fas stage to bleach recycled fibers, TAPPI JOURNAL, July 2000, Vol. 83(7)

Addition of sodium silicate and chelant to the fas stage to bleach recycled fibers, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Advanced combustion and flow modeling: comprehensive model study improves recovery boiler operation, TAPPI JOURNAL, July 2000, Vol. 83(7)

Advanced combustion and flow modeling: comprehensive model study improves recovery boiler operation, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Alkaline peroxide mechanical pulping of wheat straw Part 2: significance of peroxide stabilization to the brightening of wheat straw, TAPPI JOURNAL, July 2000, Vol. 83(7)

Alkaline peroxide mechanical pulping of wheat straw Part 2: significance of peroxide stabilization to the brightening of wheat straw, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
CMP and ctmp of a fast-growing tropical wood: acacia mangium, TAPPI JOURNAL, July 2000, Vol. 83(7)

CMP and ctmp of a fast-growing tropical wood: acacia mangium, TAPPI JOURNAL, July 2000, Vol. 83(7)

Journal articles
Open Access
Methanol formation during alkaline wood pulping, TAPPI JOURNAL, July 2000, Vol. 83(7)

Methanol formation during alkaline wood pulping, TAPPI JOURNAL, July 2000, Vol. 83(7)

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