Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Stabilization of Soil Moisture and Improvement of Indoor Air Quality by a Plant-Biofilter Integration System

식물-바이오필터에 의한 토양수분 안정화 및 실내 공기질 향상

  • Lee, Chang Hee (Dept. of Horticulture, Hankyong National University) ;
  • Choi, Bom (Dept. of Horticulture, Hankyong National University) ;
  • Chun, Man Young (Dept. of Environmental Engineering, Hankyong National University)
  • Received : 2015.02.24
  • Accepted : 2015.05.22
  • Published : 2015.10.31
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Abstract

This study was performed to investigate the stability of soil moisture in controlling air ventilation rate within a horizontal biofilter, and to compare removal efficiency (RE) of indoor air pollutants including fine dust, volatile organic compounds (VOCs), and formaldehyde (HCHO), depending on whether dieffenbachias (Diffenbachia amoena) were planted in the biofilter. The relative humidity, air temperature, and soil moisture contents showed stable values, regardless of the presence of D. amoena, and the plants grew normally in the biofilter. REs for number of fine dust particles (PM10 and PM2.5) within the biofilter filled with only soil were at least 30% and 2%, respectively. REs for number of fine dust particles (PM10 and PM2.5) within the biofilter including the plants were above 40% and 4%, respectively. RE for fine dust (PM10) weight was above 4% and 20%, respectively, in the biofilter containing only soil or soil together with plants. In the case of the biofilter filled with only soil, REs for xylene, ethylbenzene, toluene or total VOC (T-VOC) were each more than 63%; however, REs for benzene and formaldehyde (HCHO) were above 22% and 38%, respectively. In the biofilter with the plants, REs for xylene, ethylbenzene, toluene, and T-VOC were each above 72%, and REs for benzene and HCHO were above 39%. Thus, RE of the biofilter integrated with plants was found to be higher for volatile organic compounds than for fine dust. Hence, the biofilter was very effective for indoor air quality improvement and the effect was higher when integrated with plants.

본 연구는 평면형 바이오필터를 설계하여 제작하고 이 바이오필터에 디펜바키아(Dieffenbachia amoena 'Marianne')의 식재 여부에 따라 환기 용량을 제어할 수 있는 토양 수분 안정화 정도를 측정하고 미세먼지, 휘발성 유기화합물 및 포름알데히드(HCHO)와 같은 실내공기 오염물질에 대한 바이오필터의 제거율을 비교하였다. 실험 결과 디펜바키아의 식재 여부에 관계없이 모두 일정한 상대습도, 온도 및 토양 수분 함량을 나타내었고 이 바이오필터에 식재한 디펜바키아도 정상적으로 생육하였다. 바이오필터에 의한 미세먼지 제거율을 보면, 미세먼지(PM10)와 초미세먼지(PM2.5)의 입자 수는 토양만 있는 경우 각각 30%와 2% 이상 제거되었고, 디펜바키아를 식재한 경우도 각각 40%와 4% 이상 제거되었다. 미세먼지(PM10) 무게에 따른 제거율은 토양만 있는 경우 4% 이상, 디펜바키아를 식재한 경우 20% 이상으로 나타났다. 토양만 채운 바이오필터는 xylene, ethylbenzene, toluene, total volatile organic compounds(T-VOCs)를 63% 이상 제거하였으나 benzene은 22% 이상, HCHO는 38% 이상을 제거하였다. 디펜바키아를 식재한 바이오필터는 xylene, ethylbenzene, toluene, T-VOCs를 72% 이상 제거하였고 benzene과 HCHO도 39% 이상 제거하였다. 따라서 식물과 바이오 필터를 결합한 시스템은 미세먼지의 제거보다 휘발성 유기 화합물의 제거에 대한 효과가 더 높은 것으로 나타났다. 본 연구에서 제작한 평면형 바이오필터는 실내 공기질 정화에 매우 효과가 있는 것으로 나타났으며, 식물과 바이오필터를 결합하였을 때 그 효과는 더욱 큰 것으로 확인하였다.

Keywords

References

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