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Çѱ¹ÇÏõȣ¼öÇÐȸ / v.32, no.3, 1999³â, pp.216-216
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( Productivity and Nutrient Removal Potentials of Aquatic Macrophytes with Varying Life Forms and Growth Environment ) |
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| Net productivity and nutrient removal potentials of vascular hydrophytes with different life forms were estimated in the natural wetland of the river-reservoir Paldang and the macrophyte-based sewage treatment system. In the reservoir, the annual uptake fates of nitrogen and phosphorus by vascular hydrophytes were only about 1% of the external load. However, the uptake ratio in the macrophyte-growing area during $April{sim}June$ was about 27% of the external load. Culturing water hyacinth (Eichhornia crassipes) within the reservoir, nitrogen and phosphorus uptake rates were in the range $0.56{sim}1.67;gNm^{-2}d^{-1};and;0.08{sim}0.33;gPm^{-2}d^{-1}$, respectively. In the free floating treatment systems for sewage with four macrophytes, water hyacinth (Eichhoynia crassipes), iris (Iris ensata var. spontanea), cattail (Typha angustifolia) and water dyopwort (Oenanthe javanica), the phosphorus contents of macrophytes were closely related with the phosphorus concentration in water. In the pond systems with the hydraulic retention time (HRT) of 2.2 day, $BOD_5$ removal efficiencies were in the range of $61{sim}68%$, and those were not so different among macrophyte species. In the water hyacinth system, the phosphorus removal rates were 0.22 and $0.16;gPm^{-2}d^{-1}$ in the raw sewage and in the secondary treated sewage water, respectively, while the other emergent macrophyte systems showed the low range of $0.06{sim}0.12;and;0.03{sim}0.06;gPm^{-2}d^{-1}$, respectively. In the secondary-treated sewage, water hyacinth absorbed $31{sim}58%$ of the removed nitrogen and $47{sim}54%$ of the removed phosphorus. However, the uptake/removal ratio in the other emergent macrophyte systems were less than 5% for nitrogen and 10% for phosphorus. |
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| Ű¿öµå |
| Ecotechnology;Wetland;Nutrient removal;Aquatic Macrophyte;Water Quality;Paldang; |
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Çѱ¹ÇÏõȣ¼öÇÐȸÁö / v.32, no.3, 1999³â, pp.216-216
Çѱ¹ÇÏõȣ¼öÇÐȸ
ISSN : 1976-8087
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199910102457639)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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