Title

Phenol Inhibition Of Dissolved Organic Nitrogen Biodegradation In Wastewater

Document Type

Conference Proceeding

Publication Date

9-29-2018

Publication Title

Proceedings of the Water Environment Federation, WEFTEC 2018

Publisher

Water Environment Federation

Volume

2018

First page number:

2100

Last page number:

2104

Abstract

This study investigated effect of phenol on dissolved organic nitrogen (DON) biodegradation in wastewater. Primary, secondary, and final effluent samples obtained from two different municipal treatment plants were subjected to a DON biodegradation test with and without phenol using different types of bacterial cultures including an acclimated mixed culture, phenol degraders, and an ammonia oxidizing bacterial (AOB) strain. Results showed that DON biodegradation rate in the samples was suppressed by phenol at 3.4-62.9%. The inhibition was observed clearly at phenol concentrations of 250 mg/L or greater and increased with the concentration. Having phenol degraders as the test culture did not change the patterns of phenol inhibition on DON biodegradation. Surprisingly, the AOB strain played a major role in biodegradation of DON in wastewater samples when using by itself and along with a heterotrophic phenol degrader. This study is the first to reveal that DON biodegradation can be inhibited by phenol.

Keywords

Ammonia oxidizing bacteria; Ammonification; Dissolved organic nitrogen; Inhibition; Phenol

Disciplines

Environmental Engineering

Language

English

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