Details

Autor(en) / Beteiligte

• Liu, Hong
• Nan, Yan-Bin
• Li, Hui
• Wang, Xiang
• Peng, Yong-Zhen
• Chen, Yong-Zhi

Titel

Effect of Aeration Rate on Shortcut Nitrification Recovery in Intermittent Aeration Mode

Ist Teil von

• Huanjing kexue, 2018-02, Vol.39 (2), p.865

Ort / Verlag

China

Erscheinungsjahr

2018

Quelle

MEDLINE

Beschreibungen/Notizen

• Shortcut nitrification sludge, which was set aside for two months, was recovered using Reactors Ⅰ, Ⅱ, Ⅲ, and Ⅳ. The aeration rates of Reactors Ⅰ, Ⅱ, Ⅲ, and Ⅳ were 120, 100, 80, and 60 L·h , respectively, while treating real domestic sewage, and the ratio of aerobic/anoxic was 30 min/30 min at the temperature of 25℃. The influent of ammonia was 50-80 mg·L , and the concentration of effluent ammonia was stable, at below 5 mg·L , after the 12 , 18 , 21 , and 21 cycles. The removal ratio of ammonia nitrogen was about 95%. The highest concentrations of nitrite for Reactors Ⅰ, Ⅱ, Ⅲ, and Ⅳ were 20.83, 22.81, 21.50, and 20.73 mg·L , respectively, which occurred in the 30 , 35 , 38 , and 42 cycles, respectively. The concentrations of effluent nitrate were lower than 0.5 mg·L , and the nitrite accumulation rates were higher than 99%. The activity of ammonia-oxidizing bacteria (AOB) increased gradually and finally stabilized at 100.00%; however, the activity of nitrite-oxidizing bacteria (NOB) was gradually inhibited. T