유기물자원화 (Journal of the Korea Organic Resources Recycling Association)

  • 제25권3호
  • /
  • Pages.79-89
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  • 2017
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  • 1225-6498(pISSN)
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  • 2508-3015(eISSN)
유기성자원학회 (Korea Organic Resources Recycling Association)
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유기성슬러지 먹이공급에 따른 붉은줄지렁이 사육상의 pH, EC, 수용성 이온 농도변화

Chages in pH, EC and Water Soluble Ions in the Rearing Beds of Eisenia andrei (Ennelida; Oligochaeta) in Relation to the Amount of Sludges Supplied to the Earthworm Populations

  • 박광일 (대진대학교 생명화학부) ;
  • 배윤환 (대진대학교 생명화학부)
  • Park, Kwang-Il (Department of Life Science and Chemistry, Daejin University) ;
  • Bae, Yoon-Hwan (Department of Life Science and Chemistry, Daejin University)
  • 투고 : 2017.08.24
  • 심사 : 2017.09.13
  • 발행 : 2017.09.30
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초록

경기도 포천시 관내 하수 및 인분 처리장들에서 발생하는 유기성 슬러지를 지렁이 먹이로 공급하였을 때, 지렁이 사육상의 수용성 양이온, 음이온 농도 및 pH, 전기전도도 등의 이화학 성상 변화를 추적하였다. 먹이로 공급된 슬러지의 pH, 전기전도도, 유기물 함량 및 함수율은 지렁이의 단기적 섭식이 가능한 범위였으나, 슬러지의 공급량이 늘어감에 따라 섭식속도가 느려지고 결국 지렁이 사멸현상이 나타났다. 또한 슬러지 공급량이 늘어감에 따라 지렁이 사육상이 산성화되었고, 전기전도도가 높아지는 것으로 보아 염류집적 현상이 일어난 것을 알 수 있었으며, 동시에 사육상의 수용성 음이온 및 양이온 농도가 높아졌다. 특히 수용성 이온 중 ${NO_3}^-$의 농도 집적이 두드러졌다.

Changes in pH, EC and water soluble cation and anion of the bed material in the rearing box of earthworms were investigated while sewage sludges or night soil sludge were cumulatively supplied to the 15 grams of initial earthworm population in the rearing box. Initial biochemical properties of sludges such as pH, EC, V.S. and water content were at the edible levels for earthworm. However, as the cumulative amount of sludges supplied to the earthworms were increased, pH of bed material in the rearing box was lowered and EC was increased, which meant that salt contents of bed material in the rearing box had been accumulated. Water soluble cations and anions were also accumulated in the bed material of the rearing box. Accumulation rates of ${NO_3}^-$ were especially prominent. Consequently, feeding rates of earthworm populations were reduced to nearly zero and earthworm populations finally died.

키워드

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