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고전압 임펄스 기술을 활용한 슬러지 가용화

Solubilization of wasted sludge using high voltage impulse technique

  • 조승연 (호서대학교 나노바이오트로닉스학과) ;
  • 장인성 (호서대학교 환경공학과)
  • 투고 : 2017.03.10
  • 심사 : 2017.06.21
  • 발행 : 2017.06.15

초록

Several disposal processes for waste sludge from wastewater treatment plants such as landfill, ocean dump, incineration, reuse as fuels or fertilizers are practiced. However, ocean dumping is prohibited by international treat. New constructions of landfill sites or incineration facilities are limited by NIMBY and reuse processes are still suffering from low energy yield. Therefore, development of alternative processes for sludge disposal are currently needed. In this study, alternative technique for sludge solubilization using HVI (high voltage impulse) was suggested and verified experimentally. Sludge solubilization was carried out for 90 minutes using HVI discharge with peak voltage of 16 kV and pulse duration for 40 microsecond. About 3~9 % of MLSS and MLVSS concentration were reduced, but the soluble COD, TN, TP of the sludge increased to 372 %, 56 % and 102 % respectively. It indicates that the flocs and/or cells of the sludge were damaged by HVI. These resulted in flocs-disintegration and cells-lysis, which means the internal matters were bursted out of the flocs as well as the cells. Thus, electrical conductivity in bulk solution was increased. All of the results verified that the HVI could be used as an alternative technique for sludge solubilization processes.

키워드

참고문헌

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피인용 문헌

  1. Effect of Operating Parameters of the High Voltage Impulse (HVI) on Solubilization of Activated Sludge vol.40, pp.1, 2018, https://doi.org/10.4491/KSEE.2018.40.1.28
  2. 고전압 펄스의 수중인가 조건이 하이드록실 라디칼 생성에 미치는 영향 vol.31, pp.6, 2017, https://doi.org/10.11001/jksww.2017.31.6.611
  3. 고전압 펄스 전계의 인가전압과 온도가 수중 칼슘 농도 저감에 미치는 영향 vol.33, pp.2, 2017, https://doi.org/10.11001/jksww.2019.33.2.095