Katam Keerthi, Bhattacharyya Debraj
Water Environ Res. 2017 Dec 1;89(12):2071-2077. doi: 10.2175/106143017X14902968254638. Epub 2017 May 12.
This research was conducted in a batch mode in a laboratory-scale setup to study (1) the biodegradation of laundry wastewater under aerobic and anaerobic conditions and to quantify the degradation at steady-state in terms of kinetic parameters and (2) the inhibition caused by laundry wastewater on growth-substrate utilization by un-acclimated ethanol-enriched aerobic and anaerobic microbial cultures. The chemical oxygen demand (COD) removal was above 95% under aerobic condition; however, the COD removal varied between 70 and 88% under anaerobic condition. The steady-state kinetic parameters k, Ks, Y, μm, and kd were 1.75 d-1, 21.67 mg COD/L, 0.4 mg volatile suspended solids (VSS)/mg COD, 0.7 d-1, and 0.06 d-1 respectively under aerobic condition; corresponding values under anaerobic condition were 4.7 d-1, 173.67 mg COD/L, 0.06 mg VSS/mg COD, 0.3 d-1, and 0.04 d-1. Laundry wastewater caused a competitive inhibition at doses above 200 mg/L under aerobic and anaerobic conditions.
本研究在实验室规模的装置中以分批模式进行，以研究：（1）洗衣废水在好氧和厌氧条件下的生物降解，并根据动力学参数对稳态下的降解进行量化；（2）洗衣废水对未驯化的富含乙醇的好氧和厌氧微生物培养物利用生长底物的抑制作用。在好氧条件下，化学需氧量（COD）去除率高于95%；然而，在厌氧条件下，COD去除率在70%至88%之间变化。在好氧条件下，稳态动力学参数k、Ks、Y、μm和kd分别为1.75 d-1、21.67 mg COD/L、0.4 mg挥发性悬浮固体（VSS）/mg COD、0.7 d-1和0.06 d-1；在厌氧条件下的相应值分别为4.7 d-1、173.67 mg COD/L、0.06 mg VSS/mg COD、0.3 d-1和0.04 d-1。在好氧和厌氧条件下，当洗衣废水剂量高于200 mg/L时会产生竞争性抑制作用。
