好気性分解を利用した汚泥処理について

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  • コウキセイ ブンカイ オ リヨウシタ オデイ ショリ ニ ツイテ
  • Disposal of Sewage Solids by Aerobic Decomposition

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In the prevaling disposal plants, the liquid disposal of sewage is operated before the sewage solid disposal, which is generally made by anaerobic decomposition. This makes it necessary to have further treatment by evaporation and incineration of the digested solids. This report is about aerobic decomposition and digestion of sewage solids deposited in the filter tank through which the sewage is made to flow before the liquid disposal is operated. According to conditions, some differences may be perceived in the results of our test, but the stage of the digestion naturally reaches its peak in about five weeks. Then the weight of the sewage solids is reduced by 7%～15%. The function of the filter tank for digestion is almost recovered to be avai-lable in about a month and a half if it is left still. In addition, more than 30～40% of BOD is also removed in the course of the above operation.

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