预臭氧氧化对纺织印染工业废水急性毒性及惰性可溶化学需氧量组分的影响。

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

作者信息

Selçuk Hüseyin, Eremektar Gulen, Meriç Süreyya

机构信息

Environmenntal Engineering Department, Pamukkale University, Kinikli/Denizli, Turkey.

出版信息

J Hazard Mater. 2006 Sep 1;137(1):254-60. doi: 10.1016/j.jhazmat.2006.01.055. Epub 2006 Mar 13.

DOI:10.1016/j.jhazmat.2006.01.055

PMID:16533558

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 transferred ozone (TrO(3)) 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.

摘要

本研究评估了预臭氧化对取自土耳其伊斯坦布尔一家纺织印染厂的两个废水样本（S1和S2）中急性毒性、色度和化学需氧量（COD）的去除效果，以及对惰性可溶性COD组分的减少情况。废水样本在初始pH值为8.6 - 8.8、臭氧投加量为18.5 - 24 mg/L的条件下进行氧化。使用大型溞监测急性毒性。结果表明，预臭氧化提高了废水的可生物降解性并降低了急性毒性。使用129 - 200 mg/L的转移臭氧（TrO₃）浓度可使原废水中的急性毒性降低80 - 90%。此时，废水中86 - 96%的色度、33 - 39%的可溶性COD和57 - 64%的总COD被去除。发现色度和COD参数均与废水的急性毒性相关。预臭氧化降低了原废水的惰性可溶性COD组分（S(I)），而可溶性产物生成量（S(P)）略有增加（5 - 10 mg/L）。然而，残余COD（S(I)和S(P)之和）仍低于排放限值。