Department of Environmental Science, Gurukula Kangri (Deemed to Be University), Haridwar, Uttarakhand, India.
Civil Engineering Department, Netaji Subhash University of Technology, West Campus, Jaffarpur, Delhi, India.
Appl Biochem Biotechnol. 2023 Sep;195(9):5409-5423. doi: 10.1007/s12010-022-04164-4. Epub 2022 Sep 22.
Due to high augmentation in population and low availability of land, the quantum of wastewater production has surged resulting in advancements in wastewater treatment systems. To cope under such stressful circumstances, moving bed biofilm reactor (MBBR) proves to be an upgraded treatment technology for industrial and municipal wastewater treatment. The present startup study has been carried out using a laboratory-scale aerobic MBBR with working volume of 25L for textile dye wastewater treatment having AnoxKaldnes K3 media at filling percentage of 50%. In order to acclimatize the microorganisms on textile dye wastewater, the startup of the reactor was carried out using lactose as readily degradable co-substrate with textile dye wastewater in different ratios at hydraulic retention time (HRT) of 24 h. The biofilm on the media was developed in 63 days duration and the reactor attained pseudo-steady state (PSS) in 185 days period. During PSS condition of the MBBR, the maximum chemical oxygen demand (COD) removal efficiency of 92% with mixed liquor suspended solids (MLSS) concentration of 4224 ± 22 mg/L has been achieved. The kinetic study for biodegradation of textile dye wastewater has also been carried out using the Monod growth kinetics. The values of bio-kinetic coefficients of yield of heterotrophic biomass (Y) and endogenous decay coefficient for heterotrophic biomass (K) recorded are 0.394 mgVSS/mgCOD.d and 0.087 day, respectively. The values of specific substrate removal rate (k), Monod half saturation constant (K), and maximum specific growth rate for heterotrophic biomass (µ) are 0.024 mgCOD/mgVSS.d, 53.203 mg/L, and 0.0095 day, respectively, demonstrating the suitability and healthy performance of MBBR for textile dye wastewater treatment.
由于人口的大量增加和可用土地的减少，废水的产生量猛增，导致废水处理系统得到了发展。为了应对这种紧张的情况，移动床生物膜反应器（MBBR）被证明是一种用于工业和城市废水处理的升级处理技术。本启动研究使用了一个 25L 工作体积的实验室规模好氧 MBBR，填充率为 50%的 AnoxKaldnes K3 作为处理纺织染料废水的介质。为了使微生物适应纺织染料废水，在水力停留时间（HRT）为 24 小时的情况下，以不同比例用乳糖作为易降解的共基质启动反应器，同时加入纺织染料废水。在 63 天的时间内，介质上的生物膜得以发展，反应器在 185 天的时间内达到准稳定状态（PSS）。在 MBBR 的 PSS 条件下，最大化学需氧量（COD）去除效率为 92%，混合液悬浮固体（MLSS）浓度为 4224 ± 22 mg/L。还使用 Monod 生长动力学对纺织染料废水的生物降解进行了动力学研究。记录的异养生物量（Y）和异养生物内源衰减系数（K）的生物动力学系数的数值分别为 0.394 mgVSS/mgCOD.d 和 0.087 天。特定底物去除率（k）、Monod 半饱和常数（K）和异养生物最大比生长速率（µ）的值分别为 0.024 mgCOD/mgVSS.d、53.203 mg/L 和 0.0095 天，证明了 MBBR 对纺织染料废水处理的适用性和良好性能。
