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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.38, no.3, 2005³â, pp.372-381
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°¡¾ÐºÎ»ó¹ýÀ» ÀÌ¿ëÇÑ ºÎ¿µ¾çÀú¼öÁöÀÇ ¼öÁú°³¼±
( Application of Dissolved Air Flotation Technique to Improve Eutrophic Reservoir Water Quality ) |
| ±èÈ£¼·;Á¤µ¿ÀÏ;ÀÌÀϱ¹;Ȳ¼øÁø; ±¹¸³È¯°æ°úÇпø ¼öÁúÃÑ·®°ú;±¹¸³È¯°æ°úÇпø ¼öÁúÃÑ·®°ú;È¿¸²»ê¾÷;°Ç±¹´ëÇб³ ȯ°æ°úÇаú;
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| º» ¿¬±¸´Â PAC¸¦ ÀÀÁýÁ¦·Î »ç¿ëÇÑ °¡¾ÐºÎ»ó¹ý¿¡ ÀÇÇÑ ºÎ¿µ¾çÀú¼öÁöÀÇ ¼öÁú°ú ÅðÀû¹°ÀÇ °³¼±È¿°ú¸¦ Æò°¡Çϱ⠼öÇàµÇ¾ú´Ù. ¾èÀº ºÎ¿µ¾ç Àú¼öÁö¿¡ ¼³Ä¡ÇÑ mesocosm¿¡¼ (°¡·Î ${ imes}$ ¼¼·Î ${ imes}$ ³ôÀÌ: 6 ${ imes}$ 6 ${ imes}$ 3 m), ÀÔÀÚ¼º¹°Áú°ú ¿ëÁ¸¼º¹°ÁúÀÇ º¯È¿Í ³ëÁñ¿¡ ÀÇÇÑ ÅðÀû¹° ±³¶õ Àü ${cdot}$ ÈÄÀÇ ÅðÀû¹°·ÎºÎÅÍ ÀοëÃâ·üÀ» Á¶»çÇÏ¿´´Ù. ºÎÀ¯¹°Áú (SS)°ú Èֹ߼º°íÇü¹°ÀÇ Á¦°ÅÈ¿À²Àº °¢°¢ 54.4 ${sim}$ 71.2%¿Í 57.3 ${sim}$ 78.5%¿´´Ù. ÃÑÀΰú ¿±·Ï¼Ò a ³óµµ´Â Á¦°ÅÈ¿À²Àº °¢°¢ 73.5 ${sim}$ 91.5%, 53.7 ${sim}$ 97.8% ¿´´Ù. »ýÈÇÐÀû »ê¼Ò¿ä±¸·®Àº 86% ÀÌ»óÀÇ Á¦°ÅÈ¿À²À» ³ªÅ¸³ÂÀ¸³ª ÈÇÐÀû »ê¼Ò¿ä±¸·®ÀÇ Á¦°ÅÈ¿À²Àº 28.9 ${sim}$ 62.8%·Î ³·¾Ò´Ù. Á¶·ùÀÇ ¼ºÀå¿¡ ½±°Ô ÀÌ¿ëµÉ ¼ö ÀÖ´Â ¿ëÁ¸¹«±âÀÎ (DIP)°ú ¿ëÁ¸ÃÑÀÎÀº °¢°¢ 34.1 ${sim}$ 88.2%¿Í 61.8 ${sim}$ 87.6%ÀÇ Á¦°ÅÈ¿À²À» ³ªÅ¸³Â´Ù. ÅðÀû¹° ºÎ»óºÐ¸® Àü È£±âÀû Á¶°Ç°ú Çø±âÀû Á¶°ÇÀÇ »ê¼Ò ȯ°æ¿¡¼ ¿ëÁ¸¹«±âÀÎ ¿ëÃâÀ²Àº °¢°¢ 0.821 mg $m^{-2}$$day^{-1}$°ú 2.270 mg $m^{-2}$$day^{-1}$ÀÌ¿´´Ù. ¹Ý¸é¿¡ ºÎ»óºÐ¸® ÈÄ¿¡´Â °¢°¢0.684 mg $m^{-2}$$day^{-1}$¿Í 1.760 mg $m^{-2}$$day^{-1}$·Î È£±âÀû Á¶°Ç¿¡¼´Â 17%, Çø±âÀû Á¶°Ç¿¡¼´Â 23%Á¤µµÀÇ °¨¼ÒÈ¿°ú¸¦ ³ªÅ¸³Â´Ù. ¿ëÁ¸ÃÑÀÎ ¿ëÃâÀ² ¶ÇÇÑ °¡¾ÐºÎ»ó ÈÄ¿¡ È£±âÀû Á¶°Ç°ú Çø±âÀû Á¶°Ç¿¡¼ °¢°¢ 33% (5.62 ${ o}$ 3.78 mg $m^{-2}$$day^{-1}$)¿Í 20% (6.23 ${ o}$ 4.99 mg $m^{-2}$$day^{-1}$)ÀÇ °¨¼Ò°¡ ³ªÅ¸³µ´Ù. ÀÌ·¯ÇÑ °á°úµéÀº °¡¾ÐºÎ»ó½Ã ¼öü ³» ÀÔÀÚ»ó¹°ÁúÀÇ Á¦°Å »Ó¸¸ ¾Æ´Ï¶ó ÅðÀû¹°·Î ºÎÅÍÀÇ ÀοëÃâÀÌ ¾ïÁ¦µÇ¹Ç·Î ¾èÀº ºÎ¿µ¾ç Àú¼öÁöÀÇ ¼öÁú°³¼±À» À§ÇÑ È¿°úÀûÀÎ ´ë¾ÈÀÌ µÉ ¼ö ÀÖÀ½À» Á¦½ÃÇÑ´Ù. |
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| This study was conducted to test the efficiency of water quality improvement using the dissolved air flotation (DAF) technique in a shallow eutrophic reservoir. The application of DAF was followed by the addition of a chemical coagulant (poly aluminum chloride; PAC). The experiment was conducted in the mesocosm scale (wide ${ imes}$ length ${ imes}$ depth: 6 m ${ imes}$ 6 m ${ imes}$ 3 m). Suspended solids (SS) and volatile SS (VSS) concentration decreased by 54 ${sim}$ 71% and 57 ${sim}$ 79% of the initial concentrations, respectively. Total phosphorus and Chl- a concentration also decreased by 74 ${sim}$ 92% and 54 ${sim}$ 98%, respectively. BOD decreased by>86% while COD decrease ranged 29 ${sim}$ 63%. Dissolved inorganic P (DIP) and dissolved total P (DTP) concentration decreased by 34 ${sim}$ 88% and 62 ${sim}$ 88%, respectively. After DAF application further onto the sediment, DIP-release rates from the sediment decreased by 17% (0.82 ${ o}$ 0.68 mg $m^{-2}$$day^{-1}$ in the oxic condition and 23% (2.27 ${ o}$ 1.76 mg $m^{-2}$$day^{-1}$) in the anoxic condition, compared to the release rate from the untreated sediment. DTP-release rate from both the oxic and anoxic sediments also decreased by 33% (5.62 ${ o}$ 3.78 mg $m^{-2}$$day^{-1}$) and 20% (6.23 ${ o}$ 4.99 mg $m^{-2}$$day^{-1}$), respectively. These results suggest that the DAF application both to the water column and onto the sediment be effective to improve water quality by removing particulate matters in the water column as well as reducing P-release from the sediment. |
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| Ű¿öµå |
| eutrophic reservoir;water quality;DAF;PAC;P-release rate;sediment; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.38, no.3, 2005³â, pp.372-381
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200518317185077)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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