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Microbial Diversity Reveals the Partial Denitrification-anammox Process Serves as a New Pathway in the First Mainstream Anammox Plant by Zhi-Bin Wang; Xiao-Lin Liu; Cui-Na Bu; Shou-Qing Ni; Shihwu Sung is a Environmental Science article available to read on EtoBox.

What is Microbial Diversity Reveals the Partial Denitrification-anammox Process Serves as a New Pathway in the First Mainstream Anammox Plant about?

A full-scale sewage treatment plant in Xi'an city is discovered as the first mainstream anaerobic ammonia oxidation (anammox) treatment process in China. Whether its biological mechanism is the nitritation-anammox or partial denitrification (PD)-anammox brought violent controversy between two groups. As a third party, here we uncovered the mystery of the moving-bed biofilm reactor (MBBR) as a PD-anammox process by analyzing the diversity and phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt) of microbes in anoxic pond. Anammox bacteria was found in the MBBR anoxic tank, which abundance is 8.9 times of that in the common anaerobic-anoxic-oxic process, confirming the existence of anammox process. The denitrifying bacteria (DNB) content in the anoxic tank is 5.9 times of the content of ammonia oxidizing bacteria (AOB), thus the DNB-anammox system is proved at the microbial composition level. The PICRUSt analysis found that ammonium nitrogen is mainly derived from the deamination of urea. The functional genes NAR and AMO of DNB and AOB are 910.84 and 5.80 rpms, respectively. The NAR gene content is 157.0 times of the AMO gene content and it is pr

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Author

Zhi-Bin Wang; Xiao-Lin Liu; Cui-Na Bu; Shou-Qing Ni; Shihwu Sung

Publisher

Elsevier BV

Published

2021

Language

EN

Field

Environmental Science (Physical Sciences)