Mazioti Aikaterini A, Notarides Gregoris, Symeou Giannis, Vyrides Ioannis
Environmental Engineering Laboratory, Department of Chemical Engineering, Cyprus University of Technology, Limassol, Cyprus.
Front Bioeng Biotechnol. 2020 Dec 18;8:614510. doi: 10.3389/fbioe.2020.614510. eCollection 2020.
From the ships engine rooms a recalcitrant wastewater is produced called "bilge" which contains oil, metal working fluids, surfactants, and salinity. This study investigated the treatment of real bilge wastewater in short experiments using the following processes: (i) anaerobic digestion with granular sludge and ZVI addition for enhancement of methane production, (ii) activated charcoal addition to biological treatment (aerobic and anaerobic) for Chemical Oxygen Demand (COD) significant reduction and (iii) combination of ZVI and anaerobic charcoal addition for high performance treatment. The addition of ZVI in anaerobic sludge resulted in higher performance mostly in cumulative CH production. The microbial profile of anaerobic granular sludge exposed to ZVI was determined and and were the most dominant bacteria genera. Activated charcoal achieved higher COD removal, compared to biological degradation (aerobic and anaerobic). The combination of the two mechanisms, activated charcoal and biomass, had higher COD removal only for aerobic biomass. The combination of ZVI and activated charcoal to anaerobic digestion resulted in higher CH production and significant COD removal in short contact time.
船舶机舱会产生一种难处理的废水，称为“舱底水”，其中含有油、金属加工液、表面活性剂和盐分。本研究在短期实验中使用以下工艺对实际舱底废水进行了处理：（i）使用颗粒污泥进行厌氧消化并添加零价铁以提高甲烷产量；（ii）在生物处理（好氧和厌氧）中添加活性炭以显著降低化学需氧量（COD）；（iii）联合添加零价铁和厌氧活性炭以实现高效处理。在厌氧污泥中添加零价铁大多能提高甲烷累积产量。测定了暴露于零价铁的厌氧颗粒污泥的微生物谱，[此处原文缺失具体细菌属名]是最主要的细菌属。与生物降解（好氧和厌氧）相比，活性炭实现了更高的COD去除率。活性炭和生物质这两种机制的组合仅在好氧生物质情况下具有更高的COD去除率。零价铁和活性炭与厌氧消化相结合，在短接触时间内实现了更高的甲烷产量和显著的COD去除率。
