An alternative method was proposed to optimize the treatment process of palm oil mill effluent (POME) in an effort to address the poor removal efficiencies in terms of the chemical and biological oxygen demand (COD and BOD), total suspended solids (TSS) as well as oil and grease (O&G) content in treated POME along with many environmental issues associated with the existing POME treatment process. The elimination of the cooling ponds and the insertion of a dewatering device in the treatment process were recommended. The dewatering device should enhance the anaerobic digestion process by conferring a means of control on the digesters' load. The objective of this study is to identify the optimum solid: liquid ratio (total solids (TS) content) that would generate the maximum amount of biogas with better methane purity consistently throughout the anaerobic digestion of POME, all while improving the treated effluent quality. It was established that a 40S:60L (4.02% TS) was the best performing solid loading in terms of biogas production and methane yield as well as COD, BOD, TSS, and O&G removal efficiencies. Meanwhile, at higher solid loadings, the biogas production is inhibited due to poor transport and mass transfer. It is also speculated that sulfate-reducing bacteria tended to inhibit the biogas production based on the significantly elevated H2S concentration recorded for the 75S:25L and the 100S loadings.

中文翻译：

---

不同固液比对棕榈油厂废水（POME）高温厌氧消化性能的影响。

提出了另一种方法来优化棕榈油厂废水（POME）的处理过程，以解决化学和生物需氧量（COD和BOD），总悬浮固体（TSS）方面的去除效率差的问题。包括经过处理的POME中的油脂（O＆G）含量，以及与现有POME处理过程相关的许多环境问题。建议在处理过程中取消冷却池并插入脱水装置。脱水装置应通过控制消化池负荷来增强厌氧消化过程。这项研究的目的是确定最佳的固体：液体比例（总固体含量）在整个POME厌氧消化过程中将始终产生最大量的沼气，并具有更好的甲烷纯度，同时还能改善处理后的出水水质。已经确定，就沼气产量和甲烷产量以及COD，BOD，TSS和O＆G去除效率而言，40S：60L（4.02％TS）是表现最好的固体负载。同时，在较高的固体载量下，由于运输和传质不佳而抑制了沼气的产生。还据推测，基于记录的75S：25L和100S的H2S浓度显着升高，还原硫酸盐的细菌倾向于抑制沼气的产生。就沼气产量和甲烷产量以及COD，BOD，TSS和O＆G去除效率而言，02％TS）是表现最佳的固体负载。同时，在较高的固体载量下，由于运输和传质不佳而抑制了沼气的产生。还据推测，基于记录的75S：25L和100S的H2S浓度显着升高，还原硫酸盐的细菌倾向于抑制沼气的产生。就沼气产量和甲烷产量以及COD，BOD，TSS和O＆G去除效率而言，02％TS）是表现最佳的固体负载。同时，在较高的固体载量下，由于运输和传质不佳而抑制了沼气的产生。还据推测，基于记录的75S：25L和100S的H2S浓度显着升高，还原硫酸盐的细菌倾向于抑制沼气的产生。