Analysis Method for Total Nitrogen in Chlorinated Wastewater Containing Ammonium Nitrogen from Sewage Treatment Plant

DOI Web Site Web Site 3 References

Bibliographic Information

Other Title
  • アンモニア性窒素及び塩素剤を含む下水処理場放流水の全窒素濃度分析法に関する検討
  • アンモニアセイ チッソ オヨビ エンソザイ オ フクム ゲスイ ショリジョウ ホウリュウスイ ノ ゼン チッソ ノウド ブンセキホウ ニ カンスル ケントウ

Search this article

Abstract

<p>The total nitrogen concentration in chlorinated wastewater from a sewage treatment plant included a large amount of ammonium nitrogen as determined by a measurement method established by the Water Pollution Prevention Act, but it was less than the concentration of dissolved inorganic nitrogen. The total nitrogen concentration may have been underestimated because some of the chloramines in the sample changed to nitrogen gas or nitrous oxide gas under alkaline conditions. Therefore, we evaluated a novel pretreatment method for total nitrogen analysis. The recovery rate of total nitrogen in a sample including 1 mg L-1 ammonium nitrogen and 1 mg L-1 available chlorine from sodium hypochlorite was enhanced to 98% by the addition of 50 mmol L-1 sodium sulfite solution, which accounted for at least 0.4 vol% of the sample. Additionally, a recovery test was carried out with some real samples. The recovery rates of total nitrogen in wastewater from the sewage treatment plant and in water from the environment around the plant were 100-104% after the addition of 50 mmol L-1 sodium sulfite solution.</p>

Journal

References(3)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top