Spectroscopic Characterization of DOM and the Nitrogen Removal Mechanism During Wastewater Reclamation Plant

Overview

Journal PLoS One

Specialties General Medicine
Science

Date 2017 Nov 18

PMID 29149172

Citations 1

Authors

Lei Wang

Ying-Jun Li

Ying Xiong

Wen-Bing Tan

Lie-Yu Zhang

Xiang Li

Xiao-Shu Wang

Jian-Feng Xu

Tong-Tong Li

Jin-Sheng Wang

Ming-Xuan Cai

Bei-Dou Xi

Di-Hua Wang

Affiliations

Soon will be listed here.

Abstract

The performance of the Sha-he wastewater reclamation plant was evaluated in this study. To remove residual nitrogen after Anaerobic-Anoxic-Oxic (A2O) treatment, three multistage Anoxic-Oxic (A/O) were added to investigate the nitrogen removal efficiency and its mechanism. In addition, the constituents and evolution of dissolved organic matter (DOM) during wastewater reclamation was also investigated using a method combining fluorescence spectroscopy with fluorescence regional integration (FRI). The results suggested that multistage A/O treatment can effectively improve the nitrogen removal ability under low concentrations of carbon sources. The total nitrogen (TN) exhibits significantly positive correlation with fulvic acid-like materials and humic acid-like materials. The correlation coefficient for TN and fulvic acid-like substances (R2 = 0.810, P < 0.01) removal was greater than that of humic acid-like substances (R2 = 0.636, P < 0.05). The results indicate that nitrogen removal may be achieved with the fulvic-like and humic-like substances, and the removal effects were higher by fulvic acid-like substances than humic-like substances, mostly due to that the latter were relatively more difficult to be utilized as carbon source during the nitrogen removal process. The effluent water quality of biological treatment reached the first grade A standard of "Cities sewage treatment plant pollutant discharge standard" (GB18918-2002). In addition, the effluent from the membrane bioreactor reached the "Standards of reclaimed water quality" (SL368-2006).

Citing Articles

Designing Multi-Stage 2 A/O-MBR Processes for a Higher Removal Rate of Pollution in Wastewater.

Zhou Z, Zhang B, Wang Q, Meng X, Wu Q, Zheng T Membranes (Basel). 2022; 12(4).

PMID: 35448347 PMC: 9026808. DOI: 10.3390/membranes12040377.

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