Environmental Group, Department of Energy, Materials and Energy Research Center, P.O. Box 31787-316, Karaj, Iran.
Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran.
Bioprocess Biosyst Eng. 2020 Jun;43(6):981-995. doi: 10.1007/s00449-020-02294-9. Epub 2020 Jan 28.
The present study aims to shed more light on the use of membrane bioreactors (MBRs) for the treatment of vegetable oil refinery wastewaters (VORWs). A MBR was operated for 157 days in which it was fed with real VORW of varying composition at a range of organic loading rates (0.20 ± 0.05-3.79 ± 0.29 kg COD m day). The hitherto unconsidered fate of VORW constituents through the biological process was followed using gas chromatography/mass spectrometry analysis. This analysis revealed that only 19% of the identified feed constituents remained in the MBR effluent whereas ten new compounds were formed. Linear correlation analysis attributed the effluent residual COD to soluble microbial products (SMP) and non-readily biodegradable recalcitrant oily compounds. Trend of change of MLSS, mixed liquor viscosity and SMP with increasing OLR suggested that when MBR is operated under industrial conditions for the VORW treatment, the mixed liquor fouling propensity potentially increases with increasing OLR in the range studied.
本研究旨在更深入地了解膜生物反应器（MBR）在处理植物油精炼废水（VORW）中的应用。在 157 天的运行中，该 MBR 以不同组成的实际 VORW 为食，有机负荷率（0.20±0.05-3.79±0.29 kg COD m 天）在一定范围内变化。使用气相色谱/质谱分析跟踪了通过生物过程处理的 VORW 成分的迄今未被考虑的命运。该分析表明，在 MBR 出水中只有 19%的鉴定出的进料成分仍然存在，而形成了十种新的化合物。线性相关分析将出水中剩余的 COD 归因于可溶微生物产物（SMP）和不易生物降解的顽固油性化合物。随着 OLR 的增加，MLSS、混合液粘度和 SMP 的变化趋势表明，当 MBR 在工业条件下用于 VORW 处理时，混合液的污染倾向可能会随着研究范围内 OLR 的增加而增加。
