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231223s2006 xx ||||| 00| ||eng c |
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|a pubmed25n0544.xml
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|a (DE-627)NLM163276668
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|a (NLM)16749617
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Chuang, S H
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Improving the removal of anions by coagulation and dissolved air flotation in wastewater reclamation
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|c 2006
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| 336 |
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|a Text
|b txt
|2 rdacontent
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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|a Date Completed 25.10.2006
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|a Date Revised 21.03.2007
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|a published: Print
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|a Citation Status MEDLINE
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|a This study investigated the feasibility of improving the removal of anions from a secondary effluent by coagulation/flocculation (Coag/Floc) and dissolved air flotation (DAF) using a pilot-scale wastewater reclamation plant in a high-tech industrial park. The pilot plant was equipped with units of Coag/Floc, DAF, activated carbon beds (AC), microfiltration modules (MF) and a reverse-osmosis membrane (RO). It was operated in-situ continuously for around one year to evaluate the performance of anion removal in two processes - the AC-RO process and the DAF-AC-RO process. Long-term experimental results indicated that combining Coag/Floc, DAF and AC units increased the potential of pretreatment to remove anions. The removal efficiencies in Coag/Floc-DAF units were in the order phosphate > fluoride > chloride > sulfate > silicate. The charged complex of PACl flocs revealed a higher affinity for adsorption onto phosphate and fluoride than on chloride, sulfate and silicate. Comparison of the performance of Coag/Floc-DAF-AC units in the DAF-AC-RO process with that of a single AC unit in the AC-RO process demonstrated that adding Coag/Floc-DAF units increased the removal efficiencies of phosphate, fluoride and silicate by approximately 70.0%, 42.7% and 70.1%, respectively. Most of the phosphate and fluoride were removed in Coag/Floc-DAF units, while most of the silicate escaped from the Coag/Floc-DAF units, and was adsorbed and/or trapped in the AC unit. The quality of reclaimed water in the DAF-AC-RO process complied with the requirements of high-tech industries in cleaning processes. Combined units of Coag/Floc-DAF-AC were therefore recommended for use in pretreatment in wastewater reclamation in high-tech industrial parks
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 650 |
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|a Anions
|2 NLM
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| 650 |
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|a Industrial Waste
|2 NLM
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| 650 |
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|a Water Pollutants, Chemical
|2 NLM
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| 700 |
1 |
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|a Chang, W C
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Chang, T C
|e verfasserin
|4 aut
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| 700 |
1 |
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|a You, S J
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Environmental technology
|d 1998
|g 27(2006), 5 vom: 29. Mai, Seite 493-500
|w (DE-627)NLM098202545
|x 0959-3330
|7 nnns
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| 773 |
1 |
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|g volume:27
|g year:2006
|g number:5
|g day:29
|g month:05
|g pages:493-500
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|a GBV_USEFLAG_A
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|a SYSFLAG_A
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|a GBV_NLM
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|a GBV_ILN_350
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|a AR
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|d 27
|j 2006
|e 5
|b 29
|c 05
|h 493-500
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