Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU), Varanasi 221005, India; Department of Chemical Engineering, Motilal Nehru National Institute of Technology, Allahabad, Prayagraj, Uttar Pradesh 211004, India.
Aquatic Toxicology Laboratory, Environmental Toxicology Group, Council of Scientific and Industrial Research-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31, M.G. Marg, Lucknow 226001, Uttar Pradesh, India.
Bioresour Technol. 2020 Jul;307:123203. doi: 10.1016/j.biortech.2020.123203. Epub 2020 Mar 17.
In the present study, a hybrid treatment system (biological and ozonation) was developed and used in the decolorization of Congo red (CR) dye. The biological treatment was performed in packed bed bioreactor (PBBR) containing Arjuna (Terminalia Arjuna) seeds biochar immobilized with Providencia stuartii, whereas ozonation was carried out in an ozone reactor. The process variables such as temperature, process time, and inoculum size were optimized and found to be 30 °C, 2 48 h, and 3 × 10 CFU/mL, respectively with 92.0 ± 5.0% of dye decolorization. Furthermore, biologically treated effluent was subject to ozone treatment for the decolorization of the remaining CR dye. The hybrid approach reveals almost complete decolorization of Congo red (CR) dye. The kinetic study of microbial growth was examined by Monod model. In addition, the cost analysis estimation for the removal of CR dye was done, and removal per liter was found to be economic.
在本研究中，开发并使用了一种混合处理系统（生物和臭氧氧化）来对刚果红（CR）染料进行脱色。生物处理在填充床生物反应器（PBBR）中进行，其中固定有普罗维登西亚·斯图尔特菌的诃子（Terminalia Arjuna）种子生物炭；而臭氧氧化则在臭氧反应器中进行。对温度、处理时间和接种物大小等过程变量进行了优化，分别发现最佳值为 30°C、248 小时和 3×10 CFU/mL，染料脱色率为 92.0±5.0%。此外，对生物处理后的废水进行臭氧处理，以去除剩余的 CR 染料。该混合方法可实现刚果红（CR）染料的完全脱色。通过 Monod 模型对微生物生长的动力学进行了研究。此外，还对 CR 染料去除的成本分析进行了估算，发现每升去除量具有经济性。
