JIANGYuan-zhen,ZHOUSong-wei,WANGXiao-jun,et al.Treatment of Aged Landfill Leachate via Anammox Combined Process[J].China Water & Wastewater,2025,41(3):78-83.
Treatment of Aged Landfill Leachate via Anammox Combined Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第3期
Page:
78-83
Column:
Date of publication:
2025-02-01
- Abstract:
- A nitrogen removal system, comprising pre?denitrification, partial nitrification, and Anammox, was established for the treatment of aged landfill leachate. The entire system was successfully commissioned over a period of 151 days, achieving a treatment capacity of 132 m3/d. The landfill leachate was proportionally mixed with the effluent from the primary A/O process before entering the denitrification reactor. This ensured that biodegradable organic matters in the landfill leachate were effectively removed, thereby meeting the influent quality requirements for subsequent partial nitrification and Anammox reactors. Following patrial nitrification via free ammonia, the ratio of nitrite nitrogen to ammonia nitrogen in the effluent could be maintained between 1.1 and 1.4 through precise control of the influent load and aeration intensity. The rapid start?up of the Anammox process was accomplished through precise control of effluent concentration and repeated inoculation of Anammox bacteria. During full?load operation, the average total nitrogen removal efficiency by Anammox was 73.3%, with an average total nitrogen removal load of 0.74 kg/(m3·d). Compared to the conventional biochemical treatment system, the Anammox system reduced energy consumption by 54.0% and lowered treatment costs by 82.6%.
Last Update:
2025-02-01