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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.37, no.3, 2004³â, pp.344-354
½ÀÁö-¿¬¸ø ¿¬°è½Ã½ºÅÛ¿¡ ÀÇÇÑ ¼öÁú°³¼±°ú ³ó¾÷Àû ÀçÀÌ¿ë Ÿ´ç¼º ºÐ¼®
( Feasibility Study of Wetland-pond Systems for Water Quality Improvement and Agricultural Reuse )
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º» ¿¬±¸¿¡¼­´Â ¿ë¼öÀçÀÌ¿ëÀ» À§ÇØ »ýȰÇϼö¸¦ ÁöÇÏÈ帧Çü Àΰø½ÀÁö·Î ó¸®ÇÑ ÈÄ ¿¬¸ø½Ã½ºÅÛ¿¡ ¿¬°á½ÃÄÑ ¹Ì»ý¹°°ú °¢ ¼öÁúÀÎÀÚµéÀÇ Ã³¸®È¿°ú¸¦ ºÐ¼®ÇÏ¿´À¸¸ç, ±× °á°ú¸¦ ¿ä¾àÇÏ¸é ´ÙÀ½°ú °°´Ù. SSÀÇ ³óµµ´Â ¾óÀ½ÀÌ ³ìÀº 3¿ù Ãʼø¿¡¼­ 4¿ù Ãʼø±îÁö´Â 10 mg $L^{-1}$ ÀÌÇÏÀÇ ¸Å¿ì ³·Àº ³óµµ·Î ¿ì¸® ³ª¶ó ¹æ·ù¼ö ¼öÁú±âÁغ¸´Ù ³·Àº ³óµµ¸¦ À¯ÁöÇÒ ¼ö ÀÖ¾úÀ¸³ª °Ü¿ïÀ̳ª ¿©¸§ ƯÁ¤±â°£¿¡ ³óµµ°¡ ³ô¾Æ¼­, ¿ë¼ö ÀçÀÌ¿ë½Ã º¸°Ç ${cdot}$ À§»ýÀûÀÎ Ãø¸é°ú ´õºÒ¾î ÀÌ¿ëÀÚ¿¡°Ô ½É¹ÌÀûÀÎ ºÒÆíÇÔÀÌ ¾ø¾î¾ß ÇϹǷΠÀ¯ÃâºÎ¿¡ ¿©°ú½Ã¼³ µî °ü¸®´ëÃ¥À» °ËÅäÇÒ Çʿ䰡 ÀÖÀ» °ÍÀ¸·Î »ý°¢µÈ´Ù. $BOD_5$´Â ½Ä¹°ÀÇ »ýÀå°ú ¹Ì»ý¹°ÀÇ ¼ºÀåÀÌ ÀúÁ¶ÇÑ µ¿Àý±âÀÇ ³óµµ Áõ°¡Çö»ó°ú À̵éÀÇ È°µ¿ÀÌ È°¹ßÇÑ ¼ºÀå±âÀÇ °¨¼ÒÇö»óÀ» ¶Ñ·ÇÈ÷ ³ªÅ¸³»¾úÀ¸³ª, ÀüüÀûÀ¸·Î´Â ±¹Á¦ÀûÀÎ ³ó¾÷¿ë¼ö ÀçÀÌ¿ë ¼öÁú±âÁغ¸´Ù ³·Àº ¼öÁØÀ¸·Î¼­ ¿ì·ÁÇÒ »çÇ×ÀÌ ¾Æ´Ò °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. ¿µ¾ç¹°ÁúÀÇ °æ¿ì DO°¡ »ó½ÂÇÑ È£±â¼º»óÅ¿¡¼­ T-N, T-P ³óµµ°¡ °¨¼ÒÇÏ´Â °ÍÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù. ¼öÁú°³¼±À» ¸ñÀûÀ¸·Î ¿¬¸ø½Ã½ºÅÛÀ» ÀÌ¿ëÇÒ °æ¿ì 3¿ùÁß¿¡ »óÃþºÎ¸¦ À¯Ãâ½Ã۰í 3¿ù ÀÌÈÄ¿¡´Â ¼ö½ÉÀ» ³·°Ô À¯ÁöÇÏ¿© ½É¼öÃþ±îÁö È£±â¼º»óŸ¦ À¯ÁöÇÏ´Â °ÍÀÌ ¼öÁú°ü¸®¿¡ À¯¸®ÇÒ °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. ÁöÇÏÈ帧Çü Àΰø½ÀÁö¿¡¼­ÀÇ ¹Ì»ý¹° ó¸®È¿À²Àº TC, FC, E. coli ¸ðµÎ Æò±Õ 92 ${sim}$ 96% ÀÌ»ó ³ôÀº ó¸® È¿À²À» º¸¿´À¸¸ç, Àΰø½ÀÁö À¯Ãâ¼ö°¡ ¿¬¸ø½Ã½ºÅÛÀ» °ÅÄ¡¸é¼­ Ãß°¡·Î Æò±Û 83 ${sim}$ 90% ÀÌ»ó Á¦°ÅµÇ¾î Æò±Õ ´ëÀå±Õ³óµµ°¡ 1,200MPN 100 $mL^{-1}$ ·Î½á Àΰø½ÀÁö¿Í ¿¬¸ø½Ã½ºÅÛÀ» ¿¬°è ${cdot}$ Àû¿ëÇÑ ÈÄ ³ó¾÷¿ë¼ö·Î ÀçÀÌ¿ëÇϰųª ¼ö°è·Î ¹æ·ùÇÒ°æ¿ì º¸°Ç ${cdot}$ À§»ý»óÀÇ ¹®Á¦¸¦ Å©°Ô ÁÙÀÏ ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. ¹Ì»ý¹°ÀÇ ¼Òµ¶Àº ´ëºÎºÐ ž籤¿¡ ÀÇÇØ¼­ ÀÌ·ç¾îÁö±â ¶§¹®¿¡ º» ¿¬±¸¿Í °°ÀÌ ¿¬¸ø »óÃþºÎ¿¡¼­ À¯Ãâ½Ãų °æ¿ì ³ôÀº ó¸®È¿À²À» ±â´ëÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î »ý°¢Çϸç, ´ëÀå±Õ°ú ¿¬¸ø ³»¿¡ Á¸ÀçÇÏ´Â »ý¹°µé »çÀÌÀÇ »óÈ£ÀÛ¿ëÀ» Á¤È®È÷ ÀÌÇØÇÏ¿© ÀûÀýÇÑ °ü¸®´ëÃ¥À» ¸¶·Ã ÇÒ °æ¿ì ¾ÈÁ¤ÀûÀÎ ¹æ·ù¼ö ³óµµ¸¦ È®º¸ÇÒ ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù. ÀÚ¿¬Á¤È­·Î¼­ Çϼö󸮼ö¸¦ °íµµ ó¸®ÇÒ ¼ö ÀÖ´Â Àΰø½ÀÁö¿Í ¿¬¸ø½Ã½ºÅÛÀ» ¿¬°èó¸® ÇÏ¸é ³ôÀº ¹Ì»ý¹° ¼Òµ¶È¿À²À» ³ªÅ¸³»¾î º¸°Ç ${cdot}$ À§»ý»óÀÇ ¹®Á¦¸¦ Å©°Ô ÁÙÀÏ ¼ö ÀÖÀ» °ÍÀ¸·Î ±â´ëµÈ´Ù. Àΰø½ÀÁö¿Í ¿¬°èÇÑ ¿¬¸ø½Ã½ºÅÛÀÇ Çϼö󸮹æ½ÄÀº °£´ÜÇÑ ±¸Á¶, Å« ¿ÏÃæ´É·Â, ÀûÀº ½½·¯Áö ¹ß»ý, °£¼ÒÇÑ À¯Áö ${cdot}$ °ü¸®ÀÇ ÀåÁ¡À» °¡Áö°í À־, ¼Ò±Ô¸ðÇϼöó¸®¿Í ³ó¾÷¿ë¼ö ÀçÀÌ¿ë ±â¼ú·Î¼­ Àû¿ë°¡´É¼ºÀÌ Å¬°ÍÀ¸·Î ÆÇ´ÜµÈ´Ù.
A pilot study was performed from September 2000 to April 2004 to examine the feasibility of the wetland-pond system for the agricultural reuse of reclaimed water. The wetland system was a subsurface flow type, with a hydraulic residence time of 3.5 days, and the subsequent pond was 8 $m^3$ in volume (2 m ${ imes}$ 2 m ${ imes}$ 2 m) and operated with intermittent-discharge and continuous flow types. The wetland system was effective in treating the sewage; median removal efficiencies of $BOD_5$ and TSS were above 70.0%, with mean effluent concentrations of 27.1 and 16.8 mg $L^{-1}$, respectively, for these constituents. However, they did often exceed the effluent water quality standards of 20 mg $L^{-1}$. Removal of T-N and T-P was relatively less effective and mean effluent concentrations were approximately 103.2 and 7.2 mg $L^{-1}$, respectively. The wetland system demonstrated high removal rate (92 ${sim}$ 90%) of microorganisms, but effluent concentrations were in the range of 300 ${sim}$ 16,000 MPN 100 $mL^{-1}$ which is still high for agricultural reuse. The subsequent pond system provided further treatment of the wetland effluent, and especially additional microorganisms removal in addition to wetland-pond system could reduce the mean concentration to 1,000 MPN 100 $mL^{-1}$ from about $10^5$ MPN 100 $mL^{-1}$ of wetland influent. Other parameters in the pond system showed seasonal variation, and the upper layer of the pond water column became remarkably clear immediately after ice melt. Overall, the wetland system was found to be adequate for treating sewage with stable removal efficiency, and the subsequent pond was effective for further polishing. This study concerned agricultural reuse of reclaimed water using natural systems. Considering stable performance and effective removal of bacterial indicators as well as other water quality parameters, low maintenance, and cost-effectiveness, wetland- pond system was thought to be an effective and feasible alternative for agricultural reuse of reclaimed water in rural area.
 
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pond system;sewage treatment;reclaimed water;water reuse;indicator microorganisms;suspended solids;turbidity;organic matter;nutrients;
 
Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.37, no.3, 2004³â, pp.344-354
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200418317183162)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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