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DOI 10.2172/793330
Title Acoustic Separation Technology
Creator/Author Fred Ahrens ; Tim Patterson
Publication Date2002 Feb 22
OSTI IdentifierOSTI ID: 793330
Report Number(s)DOE/ID/13553
DOE Contract NumberFC07-97ID13553
DOI10.2172/793330
Other Number(s)TRN: US200207%%26
Resource TypeTechnical Report
Resource RelationOther Information: PBD: 22 Feb 2002
CoverageFinal
Research OrgInstitute of Paper Science and Technology (US)
Sponsoring Org(US)
Subject32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ACOUSTICS; ECONOMICS; ULTRASONIC WAVES; WASTE WATER; WATER TREATMENT; PAPER INDUSTRY; FLOCCULATION
Description/AbstractToday's restrictive environmental regulations encourage paper mills to close their water systems. Closed water systems increase the level of contaminants significantly. Accumulations of solid suspensions are detrimental to both the papermaking process and the final products. To remove these solids, technologies such as flotation using dissolved air (DAF), centrifuging, and screening have been developed. Dissolved Air Flotation systems are commonly used to clarify whitewater. These passive systems use high pressure to dissolve air into whitewater. When the pressure is released, air micro-bubbles form and attach themselves to fibers and particles, which then float to the surface where they are mechanically skimmed off. There is an economic incentive to explore alternatives to the DAF technology to drive down the cost of whitewater processing and minimize the use of chemicals. The installed capital cost for a DAF system is significant and a typical DAF system takes up considerable space. An alternative approach, which is the subject of this project, involves a dual method combining the advantages of chemical flocculation and in-line ultrasonic clarification to efficiently remove flocculated contaminants from a water stream
Country of PublicationUnited States
LanguageEnglish
FormatMedium: ED; Size: vp.
Availability OSTI as DE00793330
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System Entry Date2008 Feb 05
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