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A Performance Comparison of Anaerobic and an Integrated Anaerobic-Aerobic Biological Reactor System for the Effective Treatment of Textile Wastewater
International Journal of Chemical Engineering ( IF 2.3 ) Pub Date : 2021-02-10 , DOI: 10.1155/2021/8894332
Tasneem M. Kathawala 1 , K. Veena Gayathri 1 , P. Senthil Kumar 2
Affiliation  

The accumulation of recalcitrant azo dyes from untreated textile effluents has adversely impacted the ecosystem. The immense stability in their nature is conferred by the presence of azo bonds (N=N) in their structure. The reduction of this azo bond occurs exclusively under anaerobic conditions giving rise to colorless aromatic amines, which are carcinogenic. In the present study, a synthetic textile effluent containing mixed azo dyes such as Reactive Red, Reactive Black, and Reactive Brown, was treated using activated sludge under anaerobic conditions in a lab-scale anaerobic sequential batch reactor (An-SBR). At a concentration of 100 mg/L of mixed azo dyes, the An-SBR gave a maximum of 88% decolorization detected through UV-visible spectroscopy. Physicochemical analyses revealed 73% removal of BOD, 90% TDS removal, 69% COD removal, 4.05% TKN removal, 66% chloride removal, and 73% hardness removal. When the concentration of dyes was increased to 500 mg/L, the treatment showed a decrease in decolorization efficiency. This was then compared to a sequential anaerobic-aerobic treatment process performed in An-SBR and a laboratory-scale aerobic moving bed biofilm reactor (MBBR). The study revealed that the sequential process held more potential for commercial application than exclusively an anaerobic process. The metabolites formed during the treatment phase were extracted and analyzed by FT-IR and HPLC and identified through GC-MS analyses and were compared to those found in the untreated effluent. A phytotoxicity test was conducted on the remainder (secondary) sludge using Vigna unguiculata, and it was found to show a 50% reduction in germination and retardation in root and shoot length.

中文翻译:

厌氧和一体化厌氧-好氧生物反应器系统对纺织品废水进行有效处理的性能比较

未经处理的纺织品废水中难降解的偶氮染料的积累对生态系统产生了不利影响。它们的性质具有极大的稳定性,其结构中存在偶氮键(N = N)。该偶氮键的还原仅在厌氧条件下发生,从而产生无色的芳族胺,这些胺具有致癌性。在本研究中,在实验室规模的厌氧顺序分批反应器(An-SBR)中,在厌氧条件下使用活性污泥处理了含有混合偶氮染料(例如活性红,活性黑和活性棕)的合成纺织废水。在100 mg / L的混合偶氮染料浓度下,An-SBR通过紫外可见光谱检测到的最大脱色率为88%。物理化学分析显示BOD去除73%,TDS去除90%,COD去除69%,4。05%TKN去除,66%氯化物去除和73%硬度去除。当染料的浓度增加到500 mg / L时,处理表明脱色效率降低。然后将其与在An-SBR和实验室规模的需氧移动床生物膜反应器(MBBR)中进行的顺序厌氧-好氧处理过程进行比较。研究表明,顺序工艺比仅厌氧工艺具有更大的商业应用潜力。在处理阶段形成的代谢物经FT-IR和HPLC提取和分析,并通过GC-MS分析进行鉴定,并与未处理废水中的代谢物进行比较。使用以下方法对其余(二次)污泥进行了植物毒性测试 当染料的浓度增加到500 mg / L时,处理表明脱色效率降低。然后将其与在An-SBR和实验室规模的需氧移动床生物膜反应器(MBBR)中进行的顺序厌氧-好氧处理过程进行比较。研究表明,顺序工艺比仅厌氧工艺具有更大的商业应用潜力。在处理阶段形成的代谢物经FT-IR和HPLC提取和分析,并通过GC-MS分析进行鉴定,并与未处理废水中的代谢物进行比较。使用以下方法对其余(二次)污泥进行了植物毒性测试 当染料的浓度增加到500 mg / L时,处理表明脱色效率降低。然后将其与在An-SBR和实验室规模的需氧移动床生物膜反应器(MBBR)中进行的顺序厌氧-好氧处理过程进行比较。研究表明,顺序工艺比仅厌氧工艺具有更大的商业应用潜力。在处理阶段形成的代谢物经FT-IR和HPLC提取和分析,并通过GC-MS分析进行鉴定,并与未处理废水中的代谢物进行比较。使用以下方法对其余(二次)污泥进行了植物毒性测试 然后将其与在An-SBR和实验室规模的需氧移动床生物膜反应器(MBBR)中进行的顺序厌氧-好氧处理过程进行比较。研究表明,顺序工艺比仅厌氧工艺具有更大的商业应用潜力。在处理阶段形成的代谢物经FT-IR和HPLC提取和分析,并通过GC-MS分析进行鉴定,并与未处理废水中的代谢物进行比较。使用以下方法对其余(二次)污泥进行了植物毒性测试 然后将其与在An-SBR和实验室规模的需氧移动床生物膜反应器(MBBR)中进行的顺序厌氧-好氧处理过程进行比较。研究表明,顺序工艺比仅厌氧工艺具有更大的商业应用潜力。在处理阶段形成的代谢物经FT-IR和HPLC提取和分析,并通过GC-MS分析进行鉴定,并与未处理废水中的代谢物进行比较。使用以下方法对其余(二次)污泥进行了植物毒性测试 在处理阶段形成的代谢物经FT-IR和HPLC提取和分析,并通过GC-MS分析进行鉴定,并与未处理废水中的代谢物进行比较。使用以下方法对其余(二次)污泥进行了植物毒性测试 在处理阶段形成的代谢物经FT-IR和HPLC提取和分析,并通过GC-MS分析进行鉴定,并与未处理废水中的代谢物进行比较。使用以下方法对其余(二次)污泥进行了植物毒性测试gna豆Vigna unguiculata),发芽和发芽的根和茎长度减少了50%。
更新日期:2021-02-10
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