Department of Environmental Science and Technology, Cyprus University of Technology, 95 Eirinis Str., P.O. BOX 50329, 3603, Limassol, Cyprus.
Department of Environmental Science and Technology, Cyprus University of Technology, 95 Eirinis Str., P.O. BOX 50329, 3603, Limassol, Cyprus.
J Environ Manage. 2018 Jul 1;217:356-362. doi: 10.1016/j.jenvman.2018.03.086. Epub 2018 Apr 5.
The bilge water that is stored at the bottom of the ships is saline and greasy wastewater with a high Chemical Oxygen Demand (COD) fluctuations (2-12 g COD L). The aim of this study was to examine at a laboratory scale the biodegradation of bilge water using first anaerobic granular sludge followed by aerobic microbial consortium (consisted of 5 strains) and vice versa and then based on this to implement a pilot scale study. Batch results showed that granular sludge and aerobic consortium can remove up to 28% of COD in 13 days and 65% of COD removal in 4 days, respectively. The post treatment of anaerobic and aerobic effluent with aerobic consortium and granular sludge resulted in further 35% and 5% COD removal, respectively. The addition of glycine betaine or nitrates to the aerobic consortium did not enhance significantly its ability to remove COD from bilge water. The aerobic microbial consortium was inoculated in 3 pilot (200 L) Moving Bed Biofilm Reactors (MBBRs) under filling fractions of 10%, 20% and 40% and treated real bilge water for 165 days under 36 h HRT. The MBBR with a filling fraction of 40% resulted in the highest COD decrease (60%) compared to the operation of the MBBRs with a filling fraction of 10% and 20%. GC-MS analysis on 165 day pointed out the main organic compounds presence in the influent and in the MBBR (10% filling fraction) effluent.
船舶底部储存的舱底水是高化学需氧量（COD）波动的咸水和含油废水（2-12g COD L）。本研究的目的是在实验室规模下，使用厌氧颗粒污泥和随后的好氧微生物群落（由 5 株组成）以及反之来研究舱底水的生物降解，并在此基础上进行中试规模研究。批处理结果表明，颗粒污泥和好氧菌群落分别可在 13 天内去除高达 28%的 COD 和 4 天内去除 65%的 COD。随后，将厌氧和好氧出水用好氧菌群落和颗粒污泥进行后处理，可分别进一步去除 35%和 5%的 COD。向好氧菌群落中添加甜菜碱或硝酸盐并没有显著提高其从舱底水中去除 COD 的能力。将好氧微生物群落接种到 3 个中试（200L）移动床生物膜反应器（MBBR）中，填充率分别为 10%、20%和 40%，并在 36h 的 HRT 下处理实际舱底水 165 天。与填充率为 10%和 20%的 MBBR 相比，填充率为 40%的 MBBR 可使 COD 降低率最高（60%）。165 天的 GC-MS 分析指出了进水和 MBBR（填充率 10%）出水中主要有机化合物的存在。
