Gopinath Kannappan Panchamoorthy, Asan Meera Sahib Hajamohideen, Muthukumar Karuppan, Velan Manickam
Department of Chemical Engineering, A.C. College of Technology, Anna University, Sardar Patel Road, Chennai 600 025, India.
Bioresour Technol. 2009 Jan;100(2):670-5. doi: 10.1016/j.biortech.2008.07.048. Epub 2008 Sep 7.
The biodegradation of Congored, a toxic azo dye, was studied by using a hybrid technique involving sonolysis as pretreatment followed by biological treatment. The experiments were carried out with and without pretreatment using dye solution as a sole source of nutrition with an isolated and acclimatized strain of Bacillus sp. obtained from tannery industry effluent. The pretreatment time was varied as 30, 60, 90, 120, 150 and 180 min and then the pretreated dye solution was subjected to biological treatment. The effectiveness of pretreatment was compared with the results of biological degradation of non pretreated Congored and the results showed that the pretreatment improved the efficiency of the biodegradation of Congored. During the biological degradation, the increase in initial dye concentration decreased the decolorization rate and at high concentrations (1500 and 2000 mg/l), the inhibition was observed. The optimum pH and temperature were determined to be 7.0 and 37 degrees C, respectively. The data obtained through biodegradation experiments were fitted with five different kinetic models and the results were analyzed.
采用一种混合技术研究了有毒偶氮染料刚果红的生物降解，该技术包括以声化学分解作为预处理，随后进行生物处理。实验分别在有预处理和无预处理的情况下进行，使用染料溶液作为唯一营养源，接种从制革工业废水中分离并驯化的芽孢杆菌菌株。预处理时间分别为30、60、90、120、150和180分钟，然后对预处理后的染料溶液进行生物处理。将预处理的效果与未预处理的刚果红生物降解结果进行比较，结果表明预处理提高了刚果红的生物降解效率。在生物降解过程中，初始染料浓度的增加降低了脱色率，在高浓度（1500和2000mg/l）下观察到了抑制作用。确定最佳pH值和温度分别为7.0和37℃。通过生物降解实验获得的数据与五种不同的动力学模型进行拟合，并对结果进行了分析。
