Removal and Effects of Surfactants in Activated Sludge System

Mitru, Daniel; Nechifor, Gheorghe; Gheorghe, Stefania; Banciu, Alina Roxana; Ionescu, Lucian; Stoica, Catalina; Ionica, Daniela Liliana; Lucaciu, Irina Eugenia

Daniel Mitru, Gheorghe Nechifor, Stefania Gheorghe, Alina Roxana Banciu, Lucian Ionescu, Catalina Stoica, Daniela Liliana Ionica, Irina Eugenia Lucaciu

Removal and Effects of Surfactants in Activated Sludge System

Abstract:

The widespread use of detergents has raised concern with regard to the environmental pollution caused by their active substances, which are biorefractory, toxic or persistent. Even though anionic and non-ionic surfactants often used in commercial detergents composition are reasonably degradable under aerobic conditions and not particularly toxic at low concentrations, high concentration of surfactants influenced the activated sludge activity and are harmful for the aquatic environment. In the literature, data on the biodegradability and/or ecotoxicity of a certain type of surfactant (anionic, nonionic, cationic) are usually presented. Our study aimed to assess the biodegradability of a mixture of two types of surfactants (anionic mixed with non-ionic) and also, effects caused by their presence of elevated concentrations to the activated sludge micro-organisms, within a batch experiment. We performed a biodegradability test (according Zahn-Wellens method) on 2 synthetic solutions with high concentrations of anionic surfactant -methyl dodecylbenzene sulfonate (15-25 mg/L) and non-ionic surfactant -4-nonylphenyl-polyethylene glycol (10 mg/L). The study established different percent of biodegradability (measured by COD decrease and surfactants removal) depending on initial concentrations of anionic and nonionic surfactants in the tested solutions. High surfactants concentrations modulated the activity and morphology of activated sludge, so its degradation efficiency of the organic substrate has decreased. Surfactant solutions resulting from biodegradability experiment have been tested for toxicity to planktonic crustaceans (Daphnia magna).

Keywords:
anionic surfactants; non-ionic surfactants; COD; activated sludge; flocs morphology

Issue: 2020, Volume 71, Issue 1

Pages: 100-106

Publication date: 2020/2/7

https://doi.org/10.37358/RC.20.1.7819

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This article is published under the Creative Commons Attribution 4.0 International License

Citation Styles

Cite this article as:
MITRU, D., NECHIFOR, G., GHEORGHE, S., BANCIU, A.R., IONESCU, L., STOICA, C., IONICA, D.L., LUCACIU, I.E., Removal and Effects of Surfactants in Activated Sludge System, Rev. Chim., 71(1), 2020, 100-106.

Vancouver
Mitru D, Nechifor G, Gheorghe S, Banciu AR, Ionescu L, Stoica C, Ionica DL, Lucaciu IE. Removal and Effects of Surfactants in Activated Sludge System. Rev. Chim.[internet]. 2020 Jan;71(1):100-106. Available from: https://doi.org/10.37358/RC.20.1.7819

APA 6th edition
Mitru, D., Nechifor, G., Gheorghe, S., Banciu, A.R., Ionescu, L., Stoica, C., Ionica, D.L. & Lucaciu, I.E. (2020). Removal and Effects of Surfactants in Activated Sludge System. Revista de Chimie, 71(1), 100-106. https://doi.org/10.37358/RC.20.1.7819

Harvard
Mitru, D., Nechifor, G., Gheorghe, S., Banciu, A.R., Ionescu, L., Stoica, C., Ionica, D.L., Lucaciu, I.E. (2020). 'Removal and Effects of Surfactants in Activated Sludge System', Revista de Chimie, 71(1), pp. 100-106. https://doi.org/10.37358/RC.20.1.7819

IEEE
D. Mitru, G. Nechifor, S. Gheorghe, A.R. Banciu, L. Ionescu, C. Stoica, D.L. Ionica, I.E. Lucaciu, "Removal and Effects of Surfactants in Activated Sludge System". Revista de Chimie, vol. 71, no. 1, pp. 100-106, 2020. [online]. https://doi.org/10.37358/RC.20.1.7819

Text
Daniel Mitru, Gheorghe Nechifor, Stefania Gheorghe, Alina Roxana Banciu, Lucian Ionescu, Catalina Stoica, Daniela Liliana Ionica, Irina Eugenia Lucaciu,
Removal and Effects of Surfactants in Activated Sludge System,
Revista de Chimie,
Volume 71, Issue 1,
2020,
Pages 100-106,
ISSN 2668-8212,
https://doi.org/10.37358/RC.20.1.7819.
(https://revistadechimie.ro/Articles.asp?ID=7819)
Keywords: anionic surfactants; non-ionic surfactants; COD; activated sludge; flocs morphology

RIS
TY - JOUR
T1 - Removal and Effects of Surfactants in Activated Sludge System
A1 - Mitru, Daniel
A2 - Nechifor, Gheorghe
A3 - Gheorghe, Stefania
A4 - Banciu, Alina Roxana
A5 - Ionescu, Lucian
A6 - Stoica, Catalina
A7 - Ionica, Daniela Liliana
A8 - Lucaciu, Irina Eugenia
JF - Revista de Chimie
JO - Rev. Chim.
PB - Revista de Chimie SRL
SN - 2668-8212
Y1 - 2020
VL - 71
IS - 1
SP - 100
EP - 106
UR - https://doi.org/10.37358/RC.20.1.7819
KW - anionic surfactants
KW - non-ionic surfactants
KW - COD
KW - activated sludge
KW - flocs morphology
ER -

BibTex
@article{RevCh2020P100,
author = {Mitru Daniel and Nechifor Gheorghe and Gheorghe Stefania and Banciu Alina Roxana and Ionescu Lucian and Stoica Catalina and Ionica Daniela Liliana and Lucaciu Irina Eugenia},
title = {Removal and Effects of Surfactants in Activated Sludge System},
journal = {Revista de Chimie},
volume = {71},
number = {1},
pages = {100-106},
year = {2020},
issn = {2668-8212},
doi = {https://doi.org/10.37358/RC.20.1.7819},
url = {https://revistadechimie.ro/Articles.asp?ID=7819}
}

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