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(chemical engineering)
The removal of small amounts (usually less than 0.2%) of fine particulate solids from liquids (such as drinking water) by methods such as gravity sedimentation, centrifugal sedimentation, filtration, and magnetic separation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


The removal of small amounts of fine, particulate solids from liquids. The purpose is almost invariably to improve the quality of the liquid, and the removed solids often are discarded. The particles removed by a clarifier may be as large as 100 micrometers or as small as 2 micrometers. Clarification is used in the manufacture of pharmaceuticals, beverages, and fiber and film polymers; in the reconditioning of electroplating solutions; in the recovery of dry-cleaning solvent; and for the purification of drinking water and waste water. The filters in the feed line and lubricating oil system of an internal combustion engine are clarifiers.

The methods of clarification include gravity sedimentation, centrifugal sedimentation, filtration, and magnetic separation. Clarification differs from other applications of these mechanical separation techniques by the low solid content of the suspension to be clarified (usually less than 0.2%) and the substantial completion of the particle removal. See Filtration, Magnetic separation methods, Mechanical separation techniques, Sedimentation (industry)

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
'If after the clarification, the reader cannot still comprehend, then it is his mind which is in a state of confusion as he cannot grasp a simple correction of terminology, or worse he could be intellectually challenged,' he said.
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However, the JKPP chief made it clear at two successive pressers that he would not give any clarifications and would rather prefer to go behind bars.
The first was: "The clarification of the auditor's responsibility for fraud in the auditor's report helps me understand better the nature of an audit." An overwhelming majority of lenders (87%) agreed with this statement, only 3% disagreed, and 10% chose a neutral stance.
The Centre had also sought clarification on the grant of OBC status to transgenders saying all such people cannot be clubbed under OBC category as some of them are SC/ ST by birth.
The Association of Islamic Banking Institutions Malaysia (AIBIM) has issued clarifications regarding the functioning of Islamic banks.
"We have also asked for "We have also asked for written clarification from written clarification from Humberto Grondona on Humberto Grondona on reports of him selling reports of him selling tickets.
THE UK's election watchdog is writing to Ukip asking for "clarification" about the rent-free office at the centre of a row over Nigel Farage's use of Brussels' allowances.
She however said the Philippines will have to seek clarification first from China when it comes to the latter's new fisheries law issued by the Hainan Provincial People's Congress requiring foreign vessels to seek permission first before fishing in a large portion of the disputed South China Sea.
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ENGLAND forwards coach Graham Rowntree is "seeking clarification" from the IRB over the performance of referee Steve Walsh in Saturday's 30-3 defeat to Wales.
England coach Stuart Lancaster and Graham Rowntree have rounded on referee Steve Walsh's display in the 30-3 defeat to Wales, while claiming they are awaiting 'clarification' from the International Rugby Board over a series of penalty decision.