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  • 복층여재 갈대 인공습지에 의한 생활하수 처리
  • Sewage Treatment Using a Double Media Reed Constructed Wetland
ㆍ 저자명
서정윤
ㆍ 간행물명
한국습지학회지KCI
ㆍ 권/호정보
2014년|16권 4호(통권49호)|pp.379-388 (10 pages)
ㆍ 발행정보
한국습지학회|한국
ㆍ 파일정보
정기간행물|KOR|
PDF텍스트(1.13MB)
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국문초록

본 연구는 2단(수직 및 수평 흐름) 복층여재(모래와 제올라이트 그리고 모래와 굴 껍질) 갈대 인공습지에 생활하수를 간 헐적으로 주입하였을 때 각 수질항목별 처리효율 평가이다. 하수는 수리학적 부하량 314 L/m2?day(수직 흐름 인공습지 기 준)를 하루 4(10분 동안 주입 후 5시간 50분 동안 중단)회 균등하게 간헐적으로 주입하였다. 그 결과 유출수의 pH는 수평 흐름 인공습지 굴 껍질 층의 높이에 크게 영향을 받았으며 굴 껍질 층의 높이가 200 ㎜일 때 pH 6.24를 보였다. DO(oxygen demand)는 유입수(0.19 ㎎/L)보다 수직 흐름 인공습지 유출수(7.65 ㎎/L)에서 높았다가 수평 흐름 인공습지 유 출수(6.49 ㎎/L)에서는 다시 낮아졌다. 그리고 여름보다 겨울에 높았다. 또한 OTR(oxygen transfer rate)은 수직 흐름 인공습 지 57.15 g O2/㎡ㆍday 그리고 수평 흐름 인공습지 5.65 g O2/㎡ㆍday로 나타났다. NH4 +-N의 처리효율은 80.17% (유출수 농도 6.01 ㎎/L)로 전부를 제올라이트로 충진하였을 경우(타 연구)와 비교하여 낮았지만 수직 흐름 인공습지 제올라이트 300 mm 충진 층으로도 하수처리에서 요구되는 방류수질의 T-N 농도(20 ㎎/L)까지 안전성 있게 처리할 수 있을 것으로 예측된다. 각 항목별 평균 처리효율은 유출수에서 SS 88.09%, BOD 88.12%, CODCr 83.11%, CODMn 85.58%, T-N 57.21%, NH4 +-N 80.17%, T-P 86.73%를 보였다. NO3 --N의 농도는 수직 흐름 인공습지 유출수에서 보다 수평 흐름 인공습지 유출수 에서 감소하였다. 유출수 중 T-N의 반 이상이 NO3 --N(7.92 ㎎/L)으로 잔존하였으며 NO2 --N은 평균 0.90mg/L이었다. T-P의 처리효율은 굴 껍질의 충진 층 높이가 800 ㎜에서 93.24%, 500 ㎜에서 86.30% 그리고 200 ㎜에서 55.44%로 굴 껍질 충진 층의 높이에 비례하였다.

영문초록

A sewage was treated using a serially combined vertical(VFCW) and horizontal flow double media (sand and zeolite for VFCW and sand and waste oyster-shell for HFCW) reed constructed wetland(HFCW) with intermittent feeding (see Fig. 1). The sewage was fed into the reed constructed wetland for 10 minutes every 6 hours at the hydraulic load of 314 L/㎡?day. The summarized results were as follows: pH values in the effluent depended very heavily on oyster-shell height filled in the HFCW. They were maintained at less than pH 6.24 when the height of the oyster-shell layer was 200 mm. Influent DO(oxygen demand) values(average 0.19 ㎎/L) were increased in the VFCW(average 7.65 ㎎/L) and decreased again in the HFCW(average 6.49 ㎎ /L). They were higher in the winter than in the summer. The OTR(oxygen transfer rate) was 57.15 g O2/㎡ㆍday in the VFCW and 5.65 g O2/㎡ㆍday in the HFCW. The removal efficiency of NH4 +-N was 80.17%(6.01 NH4 +-N ㎎/L in the effluent). It was lower than that in the case where only zeolite was filled in the reed constructed wetland. But it was expected that treated sewage effluent using a double media reed constructed wetland with 300 mm zeolite layer could stably meet the Korean treated sewage effluent standard(20 mg T-N/L). Average removal efficiencies were SS 88.09%, BOD 88.12%, CODCr 83.11%, CODMn 85.58%, T-N 57.21%, NH4 +-N 80.17%, T-P 86.73%. Nearly, The concentration of NO3 --N in the effluent of the VFCW was decreased in that of the HFCW. More than half of T-N in the effluent was NO3 --N(7.92 ㎎/L) but the concentration of NO2 --N in the effluent was average 0.90 mg/L. The removal efficiencies of T-P were 93.24%, 86.30% and 55.44% at the height of the oyster-shell-filled constructed wetland of 800 mm, 500 mm and 200 mm, respectively and therefore, they were proportional to oyster-shell height filled in the HFCW.

목차

1.서 론
2. 재료 및 방법
3. 결과 및 고찰
4. 결 론
감사의 글
References

키워드

수직 및 수평 흐름복층 여재간헐적 주입갈대 인공습지생활하수 처리2단Combined vertical and horizontal flowdouble mediaIntermittent feedingreed constructed wetlandsewage treatmenttwo-stage

참고문헌 (34건)

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