Details

Autor(en) / Beteiligte

• Gao, Yu Nan
• Fu, Jin Xiang
• Li, Yan Feng
• Zhao, Yu Hua
• Zhang, Wen Bo
• Zhang, Chun Na

Titel

Influence of Ammonia Nitrogen on Treatment of Groundwater Containing iron and Manganese in Aeration-Contact Oxidation Filtration Process

Ist Teil von

• Applied Mechanics and Materials, 2012-01, Vol.170-173, p.2414-2418

Ort / Verlag

Zurich: Trans Tech Publications Ltd

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Two different kinds of water were treated with aeration-contact oxidation filtration process. One was groundwater containing iron and manganese (GIM), the other was GIM polluted by ammonia (GAIM). The results showed that ammonia has almost no influence on iron removal, but has great influence on manganese. Under the condition of 1m/h filter velocity and 10 mg/L average ammonia nitrogen concentration of inlet，the outlet manganese concentration for GAIM was less than 0.1 mg/L after 315 days. When temperature dropped to 18°C below, the manganese concentration of effluent exceeded 0.1 mg/L. When average ammonia nitrogen concentration of inlet for GAIM dropped to 3.27 mg/L, the manganese concentration of outlet for GAIM was less than 0.1 mg/L in winter. And for GIM, the manganese concentration of outlet was less than 0.1 mg/L only after 52 days. Although the filter velocity increased gradually from 1 to 7 m/h, the manganese concentration of effluent was always less than 0.1 mg/L. Therefore, ammonia pollution in the groundwater greatly increases the difficulty of water treatment.