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Note added at 10 mins (2006-09-07 14:25:25 GMT)
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güzel br referans buldum

http://glossary.eea.europa.eu/EEAGlossary/P/preliminary_trea...

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Note added at 3 hrs (2006-09-07 17:32:55 GMT)
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pretreatment derseniz tabbi ki anlaşılacaktır ama bunun adı preliminary treatment'dır.

üşenmeyip eski "wastewater treatment", "water quality control" vs kitaplarimi cikarip baktim; Amerikan kitaplari yanlış yazmıyorsa bu budur.

önceki meslek yaşamımın 20 yılı atıksu arıtma tesisleriyle uğraşarak geçti.

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Note added at 3 hrs (2006-09-07 18:00:19 GMT)
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There are four stages of sewage treatment; preliminary, primary, secondary and tertiary. Before an effluent can be properly treated to tertiary level, it has to pass through the earlier stages.

Preliminary Treatment

This is intended to remove 'grit' and 'rag' from the raw sewage. A long sea outfall with a screen on the end of it is considered preliminary treatment. This method does nothing to remove the viruses and bacteria that are found in human excrement

http://www.sas.org.uk/campaign/treatment.asp

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Note added at 3 hrs (2006-09-07 18:02:16 GMT)
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Wastewater Treatment Plant Processes

Preliminary

Incoming wastewater from four interceptors is mechanically screened and degritted in one facility. Grit, scum and compacted screenings are hauled directly to a municipal solid waste incinerator.

http://www.co.arlington.va.us/Departments/EnvironmentalServi...