National Center for Studies and Research on Water and Energy (CNEREE), Cadi Ayyad University, Marrakech, Morocco E-mail:
Department of Chemistry, University of Florence, Via U. Schiff 6, 50019 Sesto Fiorentino, Florence, Italy.
Water Sci Technol. 2020 Oct;82(7):1416-1429. doi: 10.2166/wst.2020.423.
This study aims to investigate the feasibility of treating olive mill waste water (OMWW) by activated sludge pilot (AS) after its high dilution (1%) by urban waste water (UWW) and to study the effect of polyphenol compounds on the biomass during the treatment. Specific oxygen uptake rate (SOUR), mixed liquor volatile suspended solids (MLVSS), chemical oxygen demand (COD) and total polyphenols, were followed up over 100 days. In spite of the polyphenols' high concentration (up to 128 mg·L), successful biomass growth of 7.12 g .L and activity were achieved. Most of the bacteria (Pseudomonas sp., Klebsiella oxytoca, Citrobacter fereundii, Escherichia coli and Staphylococcus sp.) and fungi (Trichoderma sp., Rhizopus sp., Aspergillus niger, Penicillium sp., Fusarium sp., Alternaria) identified in the aerobic basin during the stabilization stage were known to be resistant to OMWW and showed effective adaptation of the biomass to polyphenols in high concentration. COD and polyphenols were highly eliminated (90%, 92% respectively). The sludge volume index in the pilot settling tank was almost constant at around 120 mL.g . This suggests the possibility of managing OMWW by simple injection at a given percentage in already functioning conventional AS treating UWW.
本研究旨在探讨经城市废水（UWW）高稀释（1%）处理橄榄厂废水（OMWW）的可行性，并研究多酚化合物对处理过程中生物量的影响。在 100 天的时间里，跟踪了特定需氧量（SOUR）、混合液挥发性悬浮固体（MLVSS）、化学需氧量（COD）和总多酚。尽管多酚浓度很高（高达 128mg·L），但仍成功实现了 7.12g·L 的生物量生长和活性。在稳定阶段，好氧池内鉴定出的大多数细菌（假单胞菌属、产酸克雷伯氏菌、柠檬酸杆菌、大肠杆菌和葡萄球菌属）和真菌（木霉属、根霉属、黑曲霉、青霉属、镰刀菌属、链格孢属）已知对 OMWW 具有抗性，并表现出生物量对高浓度多酚的有效适应。COD 和多酚的去除率很高（分别为 90%和 92%）。在中试沉淀池中的污泥体积指数几乎恒定在 120mL·g左右。这表明可以通过以给定百分比将 OMWW 简单注入到已经运行的常规 UWW 处理的 AS 中进行管理。
