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The first 100-m3 Anammox system treating main-stream municipal wastewater in Taiwan

Technical introduction

Anaerobic/Anoxic Ammonium oxidation (Anammox) is a biological reaction shortcut for N removal. The reaction is the oxidation of NH4+ to N2 with NO2- as electron acceptor. Compared to conventional  Nitrification-Denitrification, only half of NH4+ in the influent needs to be oxidized to NO2-, then the produced NO2- reacts with the remaining half of  NH4+ to N2 without any organic carbon addition. Therefore, Anammox is a low energy consumption and low CO2 emission technology for removing nitrogen.

Detailed technical introduction

Application

Since 2021, the combined methanogensis and one-stage anammox system has been tested in two 100 m3 reactors at Zhongzheng Road WWTP in Nantou regions.

In this system, the organic matters in the influent is converted to CH4 and NH4+ in methanogensis reactor, and then the transformed NH4+ is removed in the one-stage Anammox reactor. The organic and nitrogen pollutants are removed effectively through the two-step system.

This system has been operated successfully over one year. The effluent of total nitrogen (TN) is maintained stably below 15 mg/L (Effluent standard of TW EPA is TN <20 mg/L).

Contact

Dr. Lin, Han-Lin
Tel: 886-3-5732642
Fax:886-3-5732349
Email: itriA50649@itri.org.tw

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