The effect of pre-ozone oxidation on acute toxicity and inert soluble COD fractions of a textile finishing industry wastewater

Hüseyin Selçuk; Gulen Eremektar; Süreyya Meriç

doi:10.1016/j.jhazmat.2006.01.055

The effect of pre-ozone oxidation on acute toxicity and inert soluble COD fractions of a textile finishing industry wastewater

Hüseyin Selçuk, Gulen Eremektar, Süreyya Meriç^*

^*Corresponding author for this work

Department of Environmental Engineering

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

The present work evaluates pre-ozonation for removal of acute toxicity, color and COD as well as reduction of inert soluble COD fractions in two wastewater samples (S1 and S2) taken from a textile finishing industry, located in Istanbul (Turkey). The wastewater samples were oxidized at original pH of 8.6-8.8 under 18.5-24 mg/L of applied ozone doses. Acute toxicity was monitored using Daphnia magna. The results showed that pre-ozonation improved the biodegradability and reduced the acute toxicity. Acute toxicity in raw wastewaters was reduced by 80-90% using 129-200 mg/L transfered ozone (TrO₃) concentrations. At this point, 86-96% of color, 33-39% of soluble COD and 57-64% of total COD were removed from wastewaters. Both color and COD parameters were found related to the acute toxicity of the wastewater. Pre-ozonation decreased the inert soluble COD fraction (S_I) of raw wastewater while soluble product formation (S_P) increased slightly (5-10 mg/L). However, residual COD (the sum of S_I and S_P) remained below discharge limit.

Original language	English
Pages (from-to)	254-260
Number of pages	7
Journal	Journal of Hazardous Materials
Volume	137
Issue number	1
DOIs	https://doi.org/10.1016/j.jhazmat.2006.01.055
Publication status	Published - 1 Sept 2006

Funding

This work was partly supported by Scientific Research Council of Turkey (TUBITAK; IÇTAG-Ç035) and ITU Research Development Center. Biological characterization was realized in research laboratory of Environmental Biotechnology sponsored by TUBITAK. The technical support by Arda Yildiz and Volkan Enç is appreciated.

Funders	Funder number
ITU Research Development Center
Scientific Research Council of Turkey
TUBITAK	IÇTAG-Ç035

Keywords

Acute toxicity removal
Daphnia magna
Inert soluble COD fractions
Ozonation
Pre-oxidation
Textile finishing industry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.jhazmat.2006.01.055

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abstract = "The present work evaluates pre-ozonation for removal of acute toxicity, color and COD as well as reduction of inert soluble COD fractions in two wastewater samples (S1 and S2) taken from a textile finishing industry, located in Istanbul (Turkey). The wastewater samples were oxidized at original pH of 8.6-8.8 under 18.5-24 mg/L of applied ozone doses. Acute toxicity was monitored using Daphnia magna. The results showed that pre-ozonation improved the biodegradability and reduced the acute toxicity. Acute toxicity in raw wastewaters was reduced by 80-90% using 129-200 mg/L transfered ozone (TrO3) concentrations. At this point, 86-96% of color, 33-39% of soluble COD and 57-64% of total COD were removed from wastewaters. Both color and COD parameters were found related to the acute toxicity of the wastewater. Pre-ozonation decreased the inert soluble COD fraction (SI) of raw wastewater while soluble product formation (SP) increased slightly (5-10 mg/L). However, residual COD (the sum of SI and SP) remained below discharge limit.",

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AB - The present work evaluates pre-ozonation for removal of acute toxicity, color and COD as well as reduction of inert soluble COD fractions in two wastewater samples (S1 and S2) taken from a textile finishing industry, located in Istanbul (Turkey). The wastewater samples were oxidized at original pH of 8.6-8.8 under 18.5-24 mg/L of applied ozone doses. Acute toxicity was monitored using Daphnia magna. The results showed that pre-ozonation improved the biodegradability and reduced the acute toxicity. Acute toxicity in raw wastewaters was reduced by 80-90% using 129-200 mg/L transfered ozone (TrO3) concentrations. At this point, 86-96% of color, 33-39% of soluble COD and 57-64% of total COD were removed from wastewaters. Both color and COD parameters were found related to the acute toxicity of the wastewater. Pre-ozonation decreased the inert soluble COD fraction (SI) of raw wastewater while soluble product formation (SP) increased slightly (5-10 mg/L). However, residual COD (the sum of SI and SP) remained below discharge limit.

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The effect of pre-ozone oxidation on acute toxicity and inert soluble COD fractions of a textile finishing industry wastewater

Abstract

Funding

Keywords

UN SDGs

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