AI Article Synopsis
- Anammox is a low-carbon technology for removing nitrogen from mature landfill leachate, but it produces 11% nitrate that needs further treatment.
- This study explores using refractory organic matter (ROM) in landfill leachate as an inner carbon source for enhanced nitrogen removal, analyzing how hydraulic retention time affects the removal processes.
- The results showed a removal efficiency of 94.50% for total nitrogen and 27.12% for organic carbon, highlighting an increase in microbial populations capable of degrading ROM, indicating that ROM can effectively aid in simultaneous nitrogen and organic matter removal.
Article Abstract
Anammox is an efficient low-carbon nitrogen removal technology for mature landfill leachate (MLL). However, it produces 11 % nitrate theoretically, which needs further removal. In this study, the mechanisms of exploiting refractory organic matter (ROM) from an MLL as an inner carbon source for advanced nitrogen removal via anammox were systematically analyzed, and the effects of hydraulic retention time on nitrogen and ROM removal/utilization were investigated. Without any external carbon source, a total nitrogen and organic carbon removal efficiency of 94.50 % and 27.12 %, respectively, were achieved, with a nitrogen loading rate of 2.4 kg N/(m·d). The abundances of norank_f_norank_o_SBR1031, OLB13, and norank_f_A4b, which had the capacity to degrade ROM, increased from 21.63 % to 49.21 %. This study reveals that the ROM in an MLL can be exploited for synchronous advanced nitrogen and organic matter removal.
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| http://dx.doi.org/10.1016/j.biortech.2023.128594 | DOI Listing |
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