Next Article in Journal
Gross Primary Production of Rainfed and Irrigated Potato (Solanum tuberosum L.) in the Colombian Andean Region Using Eddy Covariance Technique
Previous Article in Journal
Biochemical Composition of Seston Reflecting the Physiological Status and Community Composition of Phytoplankton in a Temperate Coastal Embayment of Korea
Previous Article in Special Issue
Research on Forward Osmosis Membrane Technology Still Needs Improvement in Water Recovery and Wastewater Treatment
 
Search for Articles:
Title / Keyword
Author / Affiliation
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
Journals
Water
Volume 13
Issue 22
10.3390/w13223222
water-logo
Submit to this Journal Review for this Journal Edit a Special Issue
► Article Menu

Article Menu

share announcement question_answer thumb_up
...
textsms
...
Article

Effect of the Oxidative Phosphorylation Uncoupler Para-Nitrophenol on the Activated Sludge Community Structure and Performance of a Submerged Membrane Bioreactor

by
Ioannis Stavrakakis
,
Nikolaos Remmas
,
Paraschos Melidis
and
Spyridon Ntougias
*
Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67132 Xanthi, Greece
*
Author to whom correspondence should be addressed.
Academic Editor: Laura Bulgariu
Water 2021, 13(22), 3222; https://doi.org/10.3390/w13223222
Received: 18 October 2021 / Revised: 8 November 2021 / Accepted: 11 November 2021 / Published: 13 November 2021
(This article belongs to the Special Issue Membrane-Based Processes and Applications for Water Reclamation)
View Full-Text Download PDF
Browse Figures

Abstract

In this work, the metabolic uncoupler para-nitrophenol (pNP) was applied to suppress excess sludge production and to investigate its effects on the system’s performance and activated sludge community structure. The COD removal efficiency decreased from 99.0% to 89.5% prior to and after pNP addition, respectively. Application of pNP transiently reduced NH4+-N, NO3−-N and NO2−-N removal efficiencies, suggesting partial inhibition of both nitrifying and denitrifying activity. However, no changes in the relative abundance of the nitrifying bacteria occurred. Phosphorus removal efficiency was sharply reduced after pNP addition, as the consequence of hydrolysis of stored cell reserves. Tetrasphaera, a key polyphosphate accumulating organism, was also affected by the addition of pNP, a fact that highly influenced system’s ability to remove phosphorus. A drastic drop in Soluble Microbial Products (SMP) and Extracellular Polymeric Substances (EPS) was also detected shortly after the introduction of the uncoupler. On the other hand, MBR’s physicochemical parameters were restored to initial values a week after the addition of pNP. Moreover, remarkable changes in beta-diversity were noted after pNP addition. An increase of Bacteroidetes, Gammaproteobacteria and Firmicutes over Actinobacteria and Alphaproteobacteria was also observed after pNP addition. View Full-Text
Keywords: metabolic uncoupler; nitrophenols; excess sludge; nitrification and denitrification inhibition; Tetrasphaera metabolic uncoupler; nitrophenols; excess sludge; nitrification and denitrification inhibition; Tetrasphaera
►▼ Show Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Supplementary Material

SciFeed

Share and Cite

MDPI and ACS Style

Stavrakakis, I.; Remmas, N.; Melidis, P.; Ntougias, S. Effect of the Oxidative Phosphorylation Uncoupler Para-Nitrophenol on the Activated Sludge Community Structure and Performance of a Submerged Membrane Bioreactor. Water 2021, 13, 3222. https://doi.org/10.3390/w13223222

AMA Style

Stavrakakis I, Remmas N, Melidis P, Ntougias S. Effect of the Oxidative Phosphorylation Uncoupler Para-Nitrophenol on the Activated Sludge Community Structure and Performance of a Submerged Membrane Bioreactor. Water. 2021; 13(22):3222. https://doi.org/10.3390/w13223222

Chicago/Turabian Style

Stavrakakis, Ioannis, Nikolaos Remmas, Paraschos Melidis, and Spyridon Ntougias. 2021. "Effect of the Oxidative Phosphorylation Uncoupler Para-Nitrophenol on the Activated Sludge Community Structure and Performance of a Submerged Membrane Bioreactor" Water 13, no. 22: 3222. https://doi.org/10.3390/w13223222

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Metrics

Article Access Map by Country/Region

1

Author Biographies

Back to TopTop