Palm oil mill industry generates a large amount of POME (palm oil mill effluent) and EFB (empty fruit bunch) as a byproduct. Biogas production from anaerobic co-digestion of POME with EFB was investigated under mesophilic condition. High methane yield and high biodegradability were achieved as mixing POME with EFB material applied into an alkaline pretreatment method. The raw biogas from anaerobic co-digestion of POME and EFB contained 60% CH₄, 34% CO₂, and 200 ppm H₂S and was available at 1.013 bar with a production rate of 48–65 m³/h. The biomethane has not utilized as a bio-CNG gas in Southeast Asian region yet. This paper aims to identify the potential of POME biogas into purified bio-CNG gas. The location, capacity and technology of biogas refinery plant were identified based on biogas production of Malaysian palm oil mill plant. The chelate-iron (EDTA-iron solution) process as a pre-treatment method of raw biogas is among the most promising techniques for the hydrogen sulfide (H₂S) removal of 99%. The energy contents of biogas could be significantly enhanced by upgrading it to CNG fuel. A pilot-scale separation plant based on cellulosic spiral wound membrane for upgrading biogas to CNG fuel quality was constructed as having a capacity of 30 m³/h and operated at the biogas plant. The result shows that purifying yield contained 98% CH₄, 2% CO₂, 0.004% H₂O, and 1 ppm H₂S.

棕榈油加工厂产生大量的 POME（棕榈油厂废水）和 EFB（空果串）作为副产品。在中温条件下研究了 POME 与 EFB 的厌氧共消化产生的沼气。通过将 POME 与 EFB 材料混合应用于碱性预处理方法，实现了高甲烷产率和高生物降解性。来自 POME 和 EFB 厌氧共消化的原始沼气含有 60% CH ₄、34% CO ₂和 200 ppm H ₂ S，可在 1.013 bar 下获得，生产率为 48–65 m ³/H。生物甲烷尚未在东南亚地区用作生物压缩天然气。本文旨在确定 POME 沼气转化为纯化生物 CNG 气体的潜力。沼气精炼厂的位置、产能和技术是根据马来西亚棕榈油厂的沼气产量确定的。螯合铁（EDTA-铁溶液）工艺作为原料沼气的预处理方法是硫化氢（H ₂ S）去除率达 99%的最有前途的技术之一。通过将沼气升级为 CNG 燃料，可以显着提高沼气的能量含量。建造了一个基于纤维素螺旋缠绕膜的中试规模分离装置，用于将沼气升级为 CNG 燃料质量，容量为 30 m ³/h 并在沼气厂运行。结果表明纯化产率含有98% CH ₄、2% CO ₂、0.004% H ₂ O和1 ppm H ₂ S。