Oily bilge water (OBW) is complex wastewater generated from ship operation. In the present study, the application of ozonation pretreatment before the sequential batch reactor (SBR) for removing organics and polyhydroxyalkanoates (PHA) production from complex OBW were investigated. OBW was subjected to lab-scale ozone pretreatment under the various experimental conditions such as a specific reaction time (0 min–120 min), inlet ozone dose (0.5 g/L–2.5 g/L) and solution pH (4–8). Pretreatment of OBW by ozone improved biodegradability index (BDI) from 0.36 to 0.52. The GC–MS analysis revealed that the BDI enhancement was due to the formation of water-soluble carboxylic groups after 75 min of ozonation operated at solution pH 6 and 2 g/ L of O₃ dose. The CODs removal efficiency was 68 % and 92 % for SBR and ozonized SBR respectively. Also, the biopolymer production rate was increased by 4.5 folds for ozonized SBR as the bioconversion of carboxylic compounds by using a mixed bacterial consortium (MBC) was stress-free. The functional groups and thermal property of the produced PHA were tested by various analytical techniques. These results confirmed that the bioconversion of ozonized OBW into valuable biological polyesters using MBC.

舱底油污水（OBW）是船舶运营过程中产生的复杂废水。在本研究中，研究了在连续间歇式反应器（SBR）之前进行臭氧氧化预处理从复杂的OBW中去除有机物和聚羟基链烷酸酯（PHA）的应用。OBW在各种实验条件下（例如特定的反应时间（0分钟至120分钟），入口臭氧剂量（0.5 g / L至2.5 g / L）和溶液的pH值（4-8））经过实验室规模的臭氧预处理。 。臭氧对OBW的预处理将生物降解指数（BDI）从0.36提高到0.52。GC-MS分析表明，BDI增强是由于在pH 6和2 g / L的O ₃溶液中进行了75分钟的臭氧氧化后形成了水溶性羧基。剂量。SBR和臭氧化SBR的COD去除效率分别为68％和92％。同样，由于通过使用混合细菌聚生体（MBC）进行的羧酸化合物的生物转化是无压力的，因此臭氧化的SBR的生物聚合物生产率提高了4.5倍。通过各种分析技术测试了生产的PHA的官能团和热性能。这些结果证实了使用MBC将臭氧化的OBW生物转化为有价值的生物聚酯。