English translation: deposit separation; active differential sedimentation / settlement
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GLOSSARY ENTRY (DERIVED FROM QUESTION BELOW)
Dutch term or phrase:
scheidingsstorten
English translation:
deposit separation; active differential sedimentation / settlement
Dutch to English translations [PRO] Tech/Engineering - Environment & Ecology
Dutch term or phrase:scheidingsstorten
"Met het oog op hergebruik kan het soms aangewezen zijn om door middel van scheidingstechnieken (cyclonering, scheidingsstorten) de propere zandfractie van de vervuilde slibfractie te scheiden."
Text on waste processing and filtration technology.
I have tentatively translated this charm as "separation tipping". Who can confirm or provide another referenced term.
Explanation: That's a guess and a coinage; maybe someone can come up with something better (the technique seems to be fairly rare). From the context of the question, the objective is to separate the sand from the sludge, instead of the more common objective of separating all the suspended matter from the water.
In the following references, it appears that 'scheiding in depot' is an alternative term for 'scheidingsstorten'. The translator has rendered this as 'separation in deposit', but aside from the fact that this finds no resonance on the web, it seems to me to be a less than illuminating translation.
From the description of the method, it appears to make use of the difference in the sedimentation rates of sand (relatively coarse particles) and sludge (fine particles) in a moving stream of water to cause the sand to settle in a different area than the sludge.
References (the first two are a Dutch original and its translation):
Depotscheiding
Om het effect van scheiding in depot te kunnen bepalen is ± 3.400 m3 zandige specie met een kleine cutterzuiger opgebaggerd en in depot gespoten. Hierbij is het slibhoudende transportwater via een stortkist afgepompt en, vóór retourlozing op de zandvang, behandeld met lamellenseparatoren ter voorkoming van vertroebeling en verspreiding van de verontreiniging. Het bezonken slib is ontwaterd met een zeefbandpers. Totaal is op deze wijze ca. 20.000 m3 water behandeld met een debiet van ± 180 m3/uur, waarbij ca. 100 m3 ontwaterd slib is vrijgekomen. Uit de proef bleek dat zand-/slibscheiding in depot goed uitvoerbaar is. Het zand is gesedimenteerd vanaf de instroomzijde. Door verplaatsing van de spuitmond en gecontroleerd afpompen van het transportwater kon de sedimentatie zo worden gemanipuleerd dat het slib bezonk aan de uitstroomzijde van het depot. Het bezonken slib is verwijderd door oppompen en rechtstreekse ontwatering in de zeefbandpers (± 200 m3); hierna bleef ± 150 m3 steekvast slib in depot achter, dat door ontgraving is verwijderd.
De 3.400 m3 zandige baggerspecie is door ontmenging in depot gescheiden in ± 3.000 m3 zand en ± 400 m3 slib (uit behandeling van transportwater en bezinking in depot). http://www.astus.nl/Promeco/2_projecten/tongelreep.html
Deposit separation
Approximately 3,400 cubic metres of sediment was brought up by means of a small cutter dredger and put in deposit in order to determine the effect of depostit separation. In this process, the transport water with fines was pumped and, prior to discharge into the sand trap, it was treated with laminated separators in order to prevent spreading of the contamination. The settled sludge was drained by using a belt press. Using this method, a total of approximately 20,000 cubic metres of water was processed at a rate of approximately 180 cubic metres per hour, releasing about 100 cubic metres of drained sludge. The test showed that deposit seperation of sand and sludge is practical. The sand was sedimented from the inlet side. By repositioning the nozzle and by controlled removal of the transport water by pumping, it was possible to manipulate the sedimentation so that the sludge settled on the outlet side of the deposit. The settled sludge was removed by pumping and direct drainage in the belt press (approximately 200 cubic metres), leaving approximately 150 cubic metres of hard sludge in the deposit, which was removed by excavation.
The 3,400 cubic metres of sediment was separated in deposit into approximately 3,000 cubic metres of sand and approximately 400 cubic metres of sludge (from the treatment of transport water and sedimentation in deposit). Sampling showed that the separated sand easily meets the dutch standards for renewed usage as Category I soil, both on the basis of composition and leaching characteristics. http://www.promeco.nl/english/projects/tongelengels.html
Saneringsonderzoek wees uit dat volledige verwijdering van de verontreinging wenselijk is, maar uit kostenoverwegingen hebben wij vanaf 1992 onderzocht of de totaal te storten of te reinigen verontreinigde fractie kon worden verkleind door middel van fractiescheiding. De reductie van het verontreinigde volume middels het opspuiten in depot zou een substantiële kostenvermindering kunnen betekenen ten opzichte van traditionele saneringsvarianten.
Resultaten
Uit de opspuitproeven is gebleken dat scheiding op basis van korrelgrootteverdeling op de Olasfa-locatie goed realiseerbaar is. Door het opspuiten in depot wordt de fijne fractie goed gescheiden van de grove fractie. Maar liefst 85 tot 90 procent van het opgespoten materiaal sedimenteert in het 'schone' zanddepot. De concentratie in het opgespoten 'schone' zand is circa 5 procent van de concentratie in het ingangsmateriaal. Op basis hiervan blijkt dat de verontreinigingen grotendeels gebonden zijn aan de kleine fractie.
Scheiding verontreinigde grond door opspuiting http://www.tauw.nl/Corporate/index.php?target=/Corporate/con...
Thanks to both of your for the extended information. Because of the meaning of "storten" (which does not directly include precipitation, I have decided toi go with Deborahs answer. The text above also refers to the sand and sludge fraction, which appears to indicate a more physical than chemical separation. 4 KudoZ points were awarded for this answer
Explanation: A quick view of separation methods for contaminated sludge indicates that the two main methods employed are the hydrocyclone method and chemical precipitation. In the latter, chemical are added to the sludge to induce precipitation of the hazardous fractions.
-------------------------------------------------- Note added at 30 mins (2005-05-03 13:54:34 GMT) --------------------------------------------------
\'chemicalS are\' of course!
-------------------------------------------------- Note added at 33 mins (2005-05-03 13:57:23 GMT) --------------------------------------------------
The air stripping process is also significant prior to chemical precipitation. No hits at all on Google for \'scheidingsstorten\'!
deposit separation; active differential sedimentation / settlement
Explanation: That's a guess and a coinage; maybe someone can come up with something better (the technique seems to be fairly rare). From the context of the question, the objective is to separate the sand from the sludge, instead of the more common objective of separating all the suspended matter from the water.
In the following references, it appears that 'scheiding in depot' is an alternative term for 'scheidingsstorten'. The translator has rendered this as 'separation in deposit', but aside from the fact that this finds no resonance on the web, it seems to me to be a less than illuminating translation.
From the description of the method, it appears to make use of the difference in the sedimentation rates of sand (relatively coarse particles) and sludge (fine particles) in a moving stream of water to cause the sand to settle in a different area than the sludge.
References (the first two are a Dutch original and its translation):
Depotscheiding
Om het effect van scheiding in depot te kunnen bepalen is ± 3.400 m3 zandige specie met een kleine cutterzuiger opgebaggerd en in depot gespoten. Hierbij is het slibhoudende transportwater via een stortkist afgepompt en, vóór retourlozing op de zandvang, behandeld met lamellenseparatoren ter voorkoming van vertroebeling en verspreiding van de verontreiniging. Het bezonken slib is ontwaterd met een zeefbandpers. Totaal is op deze wijze ca. 20.000 m3 water behandeld met een debiet van ± 180 m3/uur, waarbij ca. 100 m3 ontwaterd slib is vrijgekomen. Uit de proef bleek dat zand-/slibscheiding in depot goed uitvoerbaar is. Het zand is gesedimenteerd vanaf de instroomzijde. Door verplaatsing van de spuitmond en gecontroleerd afpompen van het transportwater kon de sedimentatie zo worden gemanipuleerd dat het slib bezonk aan de uitstroomzijde van het depot. Het bezonken slib is verwijderd door oppompen en rechtstreekse ontwatering in de zeefbandpers (± 200 m3); hierna bleef ± 150 m3 steekvast slib in depot achter, dat door ontgraving is verwijderd.
De 3.400 m3 zandige baggerspecie is door ontmenging in depot gescheiden in ± 3.000 m3 zand en ± 400 m3 slib (uit behandeling van transportwater en bezinking in depot). http://www.astus.nl/Promeco/2_projecten/tongelreep.html
Deposit separation
Approximately 3,400 cubic metres of sediment was brought up by means of a small cutter dredger and put in deposit in order to determine the effect of depostit separation. In this process, the transport water with fines was pumped and, prior to discharge into the sand trap, it was treated with laminated separators in order to prevent spreading of the contamination. The settled sludge was drained by using a belt press. Using this method, a total of approximately 20,000 cubic metres of water was processed at a rate of approximately 180 cubic metres per hour, releasing about 100 cubic metres of drained sludge. The test showed that deposit seperation of sand and sludge is practical. The sand was sedimented from the inlet side. By repositioning the nozzle and by controlled removal of the transport water by pumping, it was possible to manipulate the sedimentation so that the sludge settled on the outlet side of the deposit. The settled sludge was removed by pumping and direct drainage in the belt press (approximately 200 cubic metres), leaving approximately 150 cubic metres of hard sludge in the deposit, which was removed by excavation.
The 3,400 cubic metres of sediment was separated in deposit into approximately 3,000 cubic metres of sand and approximately 400 cubic metres of sludge (from the treatment of transport water and sedimentation in deposit). Sampling showed that the separated sand easily meets the dutch standards for renewed usage as Category I soil, both on the basis of composition and leaching characteristics. http://www.promeco.nl/english/projects/tongelengels.html
Saneringsonderzoek wees uit dat volledige verwijdering van de verontreinging wenselijk is, maar uit kostenoverwegingen hebben wij vanaf 1992 onderzocht of de totaal te storten of te reinigen verontreinigde fractie kon worden verkleind door middel van fractiescheiding. De reductie van het verontreinigde volume middels het opspuiten in depot zou een substantiële kostenvermindering kunnen betekenen ten opzichte van traditionele saneringsvarianten.
Resultaten
Uit de opspuitproeven is gebleken dat scheiding op basis van korrelgrootteverdeling op de Olasfa-locatie goed realiseerbaar is. Door het opspuiten in depot wordt de fijne fractie goed gescheiden van de grove fractie. Maar liefst 85 tot 90 procent van het opgespoten materiaal sedimenteert in het 'schone' zanddepot. De concentratie in het opgespoten 'schone' zand is circa 5 procent van de concentratie in het ingangsmateriaal. Op basis hiervan blijkt dat de verontreinigingen grotendeels gebonden zijn aan de kleine fractie.
Scheiding verontreinigde grond door opspuiting http://www.tauw.nl/Corporate/index.php?target=/Corporate/con...
Ken Cox Local time: 14:16 Native speaker of: English PRO pts in category: 20
Grading comment
Thanks to both of your for the extended information. Because of the meaning of "storten" (which does not directly include precipitation, I have decided toi go with Deborahs answer. The text above also refers to the sand and sludge fraction, which appears to indicate a more physical than chemical separation.
The translation workplace 
