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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.

Magazine articles
Open Access
Setting a limit, TAPPI JOURNAL, July 2002, Vol. 1(5) (52KB)

Setting a limit, TAPPI JOURNAL, July 2002, Vol. 1(5) (52KB)

Magazine articles
Open Access
Evaluating treatment processes to reduce metals concentrations in pulp and paper mill wastewaters to extremely low values, TAPPI JOURNAL, April 2001, Vol. 84(4)

Evaluating treatment processes to reduce metals concentrations in pulp and paper mill wastewaters to extremely low values, TAPPI JOURNAL, April 2001, Vol. 84(4)

Magazine articles
Open Access
Treatment efficiency of eucalypt kraft pulp bleaching effluents: influence of dissolved organic matter, SOLUTIONS! & TAPPI JOURNAL, April 2002 (128KB)

Treatment efficiency of eucalypt kraft pulp bleaching effluents: influence of dissolved organic matter, SOLUTIONS! & TAPPI JOURNAL, April 2002 (128KB)

Magazine articles
Open Access
Barbara Dalpke: insights from a recent graduate, TAPPI JOURN

Barbara Dalpke: insights from a recent graduate, TAPPI JOURNAL, August 2002, Vol. 1(6) (144KB)

Magazine articles
Open Access
Graduate researcher profile: Lorraine Vander Wielen, TAPPI J

Graduate researcher profile: Lorraine Vander Wielen, TAPPI JOURNAL, December 2002, Vol. 1(10) (103KB)

Magazine articles
Open Access
Continuous dust measurement as an indication of sootblowing performance in a recovery boiler, TAPPI JOURNAL, May 2001, Vol. 84(5)

Continuous dust measurement as an indication of sootblowing performance in a recovery boiler, TAPPI JOURNAL, May 2001, Vol. 84(5)

Magazine articles
Open Access
Calcium based sulfur recovery process for kraft black liquor gasification - proof of concept', TAPPI JOURNAL, July 2000, Vol. 83(7)

Calcium based sulfur recovery process for kraft black liquor gasification - proof of concept', TAPPI JOURNAL, July 2000, Vol. 83(7)

Magazine articles
Open Access
The use of oxidized white liquor as a caustic replacement in o, eo, eop, and e2 bleaching stages of kraft hardwood and softwood pulp, TAPPI JOURNAL, June 2000, Vol. 83(6)

The use of oxidized white liquor as a caustic replacement in o, eo, eop, and e2 bleaching stages of kraft hardwood and softwood pulp, TAPPI JOURNAL, June 2000, Vol. 83(6)

Magazine articles
Open Access
Deinking difficulties related to ink formulation, printing process, and type of paper, TAPPI JOURNAL, June 2000, Vol. 83(6)

Deinking difficulties related to ink formulation, printing process, and type of paper, TAPPI JOURNAL, June 2000, Vol. 83(6)

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