ABSTRACT Anaerobic fermentation of palm oil mill effluent (POME) with ozonation doses of 2.0, 5.0, and 10.0 g O3 L−1 were applied for the contact time of continuous 110 h. Preliminary tests showed that the volatile fatty acids (VFA) were reduced up to 70% and biological oxygen demand (BOD) reduced by 89%, while the chemical oxygen demand (COD) degradability efficiency was 90% in 70 h of ozonation at 5 g O3 L−1. At initial stage, the BOD/COD ratio of 0.871 reduced to 0.110 under anaerobic conditions. Under the operational conditions, ozonation enhanced the biodegradability of the organics, as illustrated by increasing biodegradable dissolved organic carbon 7185 mg L−1 and mixed liquor suspended 40500 mg L−1. The specific methanogenic activity was 1160 mg-CH4-COD/g-VSS d at 5 g O3 L−1. SEM morphology further confirmed the effect of ozonation in fermentation at different h on granulation of POME. The ozonation improved the biodegradation of POME and reduced the VFA and COD through granulation and methanogenesis.

中文翻译：

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臭氧化对棕榈油厂废水处理以生产沼气的生物降解和产甲烷作用的影响

摘要 使用 2.0、5.0 和 10.0 g O3 L-1 的臭氧化剂量对棕榈油厂废水 (POME) 进行厌氧发酵，接触时间连续 110 小时。初步测试表明，在5 g臭氧化70 h中，挥发性脂肪酸（VFA）降低​​70%，生物需氧量（BOD）降低89%，化学需氧量（COD）降解效率为90% O3 L−1。在初始阶段，BOD/COD 比值在厌氧条件下从 0.871 降至 0.110。在操作条件下，臭氧化增强了有机物的生物降解能力，如增加可生物降解溶解有机碳 7185 mg L-1 和混合液悬浮 40500 mg L-1 所示。特定的产甲烷活性为 1160 mg-CH4-COD/g-VSS d 在 5 g O3 L-1。SEM形貌进一步证实了不同h发酵过程中臭氧化对POME造粒的影响。臭氧化改善了 POME 的生物降解，并通过造粒和产甲烷降低了 VFA 和 COD。