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Biological Treatment of Phenol in the Presence of 4-Chlorophenol by Mixed Microbial Cultures via Cometabolism
Journal of Water Chemistry and Technology ( IF 0.6 ) Pub Date : 2020-10-08 , DOI: 10.3103/s1063455x20040037
N. T. Durmuş , N. K. Kiliç , G. Dönmez

Abstract

Aromatic hydrocarbons like phenol and 4-chlorophenol (4-CP) are known as highly toxic, carcinogenic, hazardous, and therefore wastewaters containing these pollutants have to be treated. Microorganisms with bioremediation ability can be used very effectively in the treatment of wastewaters polluted with these recalcitrant chemicals. This work is focused on considering the capability of mixed microbial cultures for the treatment of wastewaters contaminated with phenol and 4-CP. For this purpose, nine different samples were taken from Emet Boron Work (BW) of Eti Mine General Directorate, petroleum-contaminated soil, Tatlar Wastewater Treatment Plant, drug mill wastewater (DW1, DW2, DW3), Stenkim Construction Chemicals, Kipaş Paper Factory and Kipaş Textile Factory. These samples were used as sources of different mixed microbial cultures. To prepare different mixed microbial cultures, an enrichment procedure was used consisting of a periodic subculturing of the samples into the mineral salt medium with 1% molasses (v/v) (MSM) at pH 7. Obtained mixed microbial cultures were tested in media with pure solutions of phenol and 4-CP or their binary mixtures. The effect of different pH levels (6; 7 and 8) and initial phenol concentrations in the presence of 4-CP (nearly 5.0 mg/L) and the absence of it on pollutant removal by nine mixed microbial cultures were determined. Of these, the most efficient culture was BW mixed culture with anoptimal pH of 8, although it could not degrade pure 4-CP. We succeeded to mineralize the pollutants 100% of 164.4 mg/L phenol and 5.3 mg/L 4-CP. Under the same media conditions, the maximum specific phenol and 4-CP values (qm) for BW mixed culture were 94.1 and 3.0 mg/g, respectively. Molasses were also used as supplementary material to support the growth of the microorganisms as an additional carbon and energy source, which might enhance cometabolic 4-CP degradation in the presence of phenol.



中文翻译:

微生物代谢混合代谢在4-氯酚存在下对苯酚的生物处理

摘要

苯酚和4-氯苯酚(4-CP)等芳香烃被认为具有剧毒,致癌,危险性,因此必须处理含有这些污染物的废水。具有生物修复能力的微生物可以非常有效地用于处理被这些难降解化学物污染的废水。这项工作的重点是考虑混合微生物培养物处理被苯酚和4-CP污染的废水的能力。为此,从Eti矿总局的Emet硼工作(BW),受石油污染的土壤,Tatlar废水处理厂,制药厂废水(DW1,DW2,DW3),Stenkim建筑化学品,基帕什造纸厂采样了九种不同的样品。和基帕什纺织厂。这些样品被用作不同混合微生物培养物的来源。为了制备不同的混合微生物培养物,使用了富集程序,包括将样品定期传代到pH为7的含1%糖蜜(v / v)(MSM)的矿物盐培养基中。苯酚和4-CP或其二元混合物的纯溶液。确定了在存在4-CP(接近5.0 mg / L)和不存在4-CP的情况下,不同的pH值(6、7和8)和初始苯酚浓度对九种混合微生物培养物去除污染物的影响。其中,最有效的培养是pH值为8的BW混合培养,尽管它不能降解纯4-CP。我们成功矿化了100%的164.4 mg / L苯酚和5.3 mg / L 4-CP污染物。在相同的介质条件下,最大比酚和4-CP值(使用富集程序,包括在pH值为7的条件下,将样品定期传代到含1%糖蜜(v / v)(MSM)的矿物盐培养基中,并在含有纯苯酚和4- CP或其二元混合物。确定了在存在4-CP(接近5.0 mg / L)和不存在4-CP的情况下,不同的pH值(6、7和8)和初始苯酚浓度对九种混合微生物培养物去除污染物的影响。其中,最有效的培养是pH值为8的BW混合培养,尽管它不能降解纯4-CP。我们成功矿化了100%的164.4 mg / L苯酚和5.3 mg / L 4-CP污染物。在相同的介质条件下,最大比酚和4-CP值(使用富集程序,包括在pH值为7的条件下,将样品定期传代到含1%糖蜜(v / v)(MSM)的矿物盐培养基中,并在含有纯苯酚和4- CP或其二元混合物。确定了在存在4-CP(接近5.0 mg / L)和不存在4-CP的情况下,不同的pH值(6、7和8)和初始苯酚浓度对九种混合微生物培养物去除污染物的影响。其中,最有效的培养是pH值为8的BW混合培养,尽管它不能降解纯4-CP。我们成功矿化了100%的164.4 mg / L苯酚和5.3 mg / L 4-CP污染物。在相同的介质条件下,最大比酚和4-CP值(在含有苯酚和4-CP或它们的二元混合物的纯溶液的培养基中测试获得的混合微生物培养物。确定了在存在4-CP(接近5.0 mg / L)和不存在4-CP的情况下,不同的pH值(6、7和8)和初始苯酚浓度对九种混合微生物培养物去除污染物的影响。其中,最有效的培养是pH值为8的BW混合培养,尽管它不能降解纯4-CP。我们成功矿化了100%的164.4 mg / L苯酚和5.3 mg / L 4-CP污染物。在相同的介质条件下,最大比酚和4-CP值(在含有苯酚和4-CP或它们的二元混合物的纯溶液的培养基中测试获得的混合微生物培养物。确定了在存在4-CP(接近5.0 mg / L)和不存在4-CP的情况下,不同的pH值(6、7和8)和初始苯酚浓度对九种混合微生物培养物去除污染物的影响。其中,最有效的培养是pH值为8的BW混合培养,尽管它不能降解纯4-CP。我们成功矿化了100%的164.4 mg / L苯酚和5.3 mg / L 4-CP污染物。在相同的介质条件下,最大比酚和4-CP值(确定了0 mg / L)的浓度,并且没有通过9种混合微生物培养物去除污染物的浓度。其中,最有效的培养是pH值为8的BW混合培养,尽管它不能降解纯4-CP。我们成功矿化了100%的164.4 mg / L苯酚和5.3 mg / L 4-CP污染物。在相同的介质条件下,最大比酚和4-CP值(确定了0 mg / L)的浓度,并且没有通过9种混合微生物培养物去除污染物的浓度。其中,最有效的培养是pH值为8的BW混合培养,尽管它不能降解纯4-CP。我们成功矿化了100%的164.4 mg / L苯酚和5.3 mg / L 4-CP污染物。在相同的介质条件下,最大比酚和4-CP值(BW混合培养的q m)分别为94.1和3.0 mg / g。糖蜜还被用作辅助材料,以支持微生物作为额外的碳和能源的生长,这可能会在苯酚存在下增强新陈代谢的4-CP降解。

更新日期:2020-10-08
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