상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제26권3호
  • /
  • Pages.471-478
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  • 2012
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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Lamellar 이차침전지에서의 침강 특성 파악

Evaluation of Settling Characteristics at Lamellar Secondary Clarifier

  • 이병희 (경기대학교 환경에너지시스템공학과)
  • 발행 : 2012.06.15
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초록

Where an activated sludge system needs to be converted to biological nutrient removal(BNR) system, the secondary clarifier must handle higher MLSS from bioreactor since nitrification in BNR system that requires higher SRTs than activated sludge system. Either increase the clarifier size or modification of clarifier physical structure is required to cope with MLSS surge. One of recommended structural modification is the insertion of Lamellar within clarifier. In this study, two clarifiers - one has Lamellar structure inserted and the other does not - were used to compare the effect of Lamellar in solid/liquid separation. Same MLSS was fed to both clarifiers and concentrations of MLSS were varied. With all MLSS concentrations, attachment of MLSS on Lamellar was observed and it was found that detached MLSS caused the higher effluent SS concentrations than that of non-Lamellar clarifier effluent. From these results, Lamellar should not be inserted in clarifier to handle MLSS from BNR processes and the recommendation must be withdrawn.

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참고문헌

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피인용 문헌

  1. Removal of Fine Suspended Solids and Soluble Heavy Metals in H Mine Drainage using Settling and Filtering : Field Application vol.18, pp.7, 2013, https://doi.org/10.7857/JSGE.2013.18.7.054