Details

Autor(en) / Beteiligte

• Sun, Hong-Wei
• Yu, Xue
• You, Yong-Jun
• Peng, Yong-Zhen
• Wang, Shu-Ying

Titel

Effect of Free Ammonia on Ammonia Escape During an Ammonia Oxidation Process

Ist Teil von

• Huanjing kexue, 2017-12, Vol.38 (12), p.5169

Ort / Verlag

China

Erscheinungsjahr

2017

Link zum Volltext

Quelle

MEDLINE

Beschreibungen/Notizen

• This study used short process nitrification sludge to investigate the effect of high free ammonia (FA) on ammonia escape during ammonia oxidation. A sequencing batch reactor (SBR) was used to study the ammonia escape process under different FA concentrations. The results indicate that FA in water is usually combined with water molecules at lower FA concentrations to produce stable NH ·H O with almost no ammonia escape. With high FA concentration (FA>687.1 mg·L ), ammonia nitrogen is not oxidized to oxidized nitrogen (NO -N concentration is <0.1 mg·L at the end of aeration), but the total nitrogen (TN) reached 269.7 mg·L . Therefore, when there is a high FA concentration, NH -N will evaporate in the form of FA, resulting in ammonia escape. In addition, when 226.6 ≤ FA ≤ 711.8 mg·L , the free ammonia escape rate (FEV) grows rapidly with the increase in FA concentration.