硫黄脱窒作用を利用した生物ろ過による硝酸性窒素の除去

DOI Web Site Web Site 被引用文献4件 参考文献24件

書誌事項

タイトル別名
  • Removal of Nitrate in Sulfur-Denitrification Filter Process.
  • 硫黄脱窒作用を利用した生物瀘過による硝酸性窒素の除去
  • イオウ ダッチツ サヨウ オ リヨウシタ セイブツ ロカ ニヨル ショウサンセ

この論文をさがす

抄録

Two types of laboratory-scale experiments were conducted to investigate nitrate removal by sulfur oxidizing denitrifiers fed with thiosulfate as electron donor. One was a batch-type activity test of denitrification with glass vials using enrichment culture. The other was a downflow column experiment at 20°C and at a filtration velocity of 4m·day-1, in which artificially contaminated water was supplied to packed-bed filled with granular anthracites. The stoichiometries of denitrification from nitrate and nitrite by oxidation of thiosulfate were discussed with removal and production data in several batch tests. The conversion rate from nitrate to nitrite was much higher than from nitrite to nitrogen gas in the batch test. The nitrogen concentration profile along the column showed that rapid removal of nitrate was observed at the upper part of the filter after development of biofilm in bed, although remarkable accumulation of nitrite took place there. The accumulation was reduced downward to some extent by distribution of attached biomass to the lower part. However, nitrite in the effluent was not removed completely after ammonium was added as an easily assimilable nitrogen source in order to promote the activity and growth of sulfur-denitrifiers. There was a possibility that their activity and growth was not controlled by nitrogen source for synthesis but suppressed by lower pH condition within the biofilm than bulk water in the column.

収録刊行物

  • 水環境学会誌

    水環境学会誌 19 (9), 715-723, 1996

    公益社団法人 日本水環境学会

被引用文献 (4)*注記

もっと見る

参考文献 (24)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ