Leakage of Turbidity to Filtrate by Picophytoplankton and Investigation for Measures in Water Purification Plant.

DOI

Bibliographic Information

Other Title
  • ピコ植物プランクトンに起因する浄水処理過程，ろ過水への濁度漏出とその対策について

Description

Cell concentration of micro-phytoplankton and Flagellates were high in raw water of Kunijima purification plant of Osaka waterworks, from July to August, 1996.<BR>Then, turbidity was leaked to filtrate of water purification system, and the majority of turbid were due to picophytoplankton. Leakage was remarkable in the raw water which was taken in from afternoon to evening. 14 thousands cells/mL of picophytoplankton in filtrates show 0.1 degree of turbidity.<BR>The results of coagulation-sedimentation by jar test examination were follows:<BR>(1) Dosage of combined chlorine was effective. (2) Optimum pH of coagulation and floc formation was<7.2 by aluminium sulfate, <7.4 by polyaluminium chloride. (3) Increase of coagulant dose was effective but cells could not be removed over 99% in spite of 120mg/l dose.<BR>The turbidity<0.1 was achieved by measures of chlorination, increase of coagulant dose, and pH modification.

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Details 詳細情報について

  • CRID
    1390001204961891712
  • NII Article ID
    130003700379
  • DOI
    10.2521/jswtb.33.233
  • ISSN
    18810438
    09106758
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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