Department of Civil Engineering, Kongunadu College of Engineering and Technology, Trichy, 621215, Tamil Nadu, India.
Department of Civil Engineering, Dr N. G. P. Institute of Technology, Coimbatore, 641048, Tamil Nadu, India.
Environ Monit Assess. 2024 Mar 11;196(4):352. doi: 10.1007/s10661-024-12518-0.
With characterized for complex and maximum substance (suspended solids, broke up oil, a mixture of inorganic and chromium sulfides), tannery wastewater was subjected to a treatment process on removal of chemical oxygen demand (COD) via upstream anaerobic sludge blanket reactor where we found reduced departure efficiencies and that process limits were affected by the assortments in regular stacking rates, closeness of chromium, and sulfides. Hence, a combination of the aerobic-anaerobic hybrid reactor was set up for sequential treatment to determine possible COD reduction. This study investigated the biological degradation of tannery wastewater in a laboratory-scale sequential up-flow aerobic-anaerobic reactor. The aerobic zone at the top was packed with spherical ball-shaped polyhedral polypropylene, and the anaerobic zone at the bottom was packed medium with granular media. The aeration flow rate varied by 2 L/min, 4 L/min, and 6 L/min in the aerobic zone, and the reactor maintained an organic loading rate (OLR) of 5 kg COD/m/d. Parameters like COD and gas yield assess the performance of the reactor. The maximum COD of 86% is removed in the anaerobic zone with an aeration rate of 6 L/min, and the 1800-mL methane gas yield is measured by the 29th day.
制革废水的特点是含有复杂的高浓度物质（悬浮固体、分解油、无机和铬硫化物的混合物），采用上游厌氧污泥床反应器进行化学需氧量 (COD) 去除处理，我们发现去除效率降低，并且该过程受到常规堆积速率、铬和硫化物的种类的影响。因此，建立了好氧-厌氧混合反应器进行顺序处理，以确定可能的 COD 降低。本研究在实验室规模的序批式上流式好氧-厌氧反应器中研究了制革废水的生物降解。顶部的好氧区填充了球形多面聚丙烯球，底部的厌氧区填充了颗粒状介质。好氧区的曝气流量分别为 2 L/min、4 L/min 和 6 L/min，反应器保持 5 kg COD/m/d 的有机负荷率 (OLR)。COD 和气体产率等参数评估了反应器的性能。在曝气速率为 6 L/min 的厌氧区，COD 的去除率最高可达 86%，第 29 天测量到的甲烷气体产率为 1800 mL。
