下水処理を行う深層湿地における窒素変換過程と質量バランス、アナモックスの寄与を探った

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Bioresour. Technol..2020 Jun;314:123737. S0960-8524(20)31009-9. doi: 10.1016/j.biortech.2020.123737.Epub 2020-06-25.

下水処理を行う深層湿地における窒素変換過程と質量バランス、アナモックスの寄与を探った

Nitrogen transformation processes and mass balance in deep constructed wetlands treating sewage, exploring the anammox contribution.

Aakanksha Rampuria
Akhilendra Bhushan Gupta
Urmila Brighu

PMID: 32615448 DOI: 10.1016/j.biortech.2020.123737.

抄録

This work was aimed to assess the contribution of classical nitrogen removal pathways in two deep constructed wetlands CW1 and CW2 located at Jaipur, India. Nitrogen mass balance revealed that 44.87% and 43.77% losses of T-N in CW1 and CW2 were unaccounted for. To elucidate these significant losses, the study was extended to assess the occurrence and contribution of a novel pathway (ANAMMOX) in overall nitrogen removal. The ratio of NH-N (removed) & NO-N (produced) in CW1 & CW2 indicated that ANAMMOX could be one of the key pathways for nitrogen removal in the CWs besides nitrification-denitrification in microbial films. The molecular analysis confirmed bands of ANAMMOX bacteria developed intrinsically. The study revealed that deep wetlands can offer a feasible option for the sustenance of ANAMMOX bacteria and may help develop design parameters for CWs for achieving higherT-N removal withsimilarsurface area as that of conventional wetlands.