The circular economy is at the core of sustainable development. The generation of biogas from the massive quantity of agricultural waste biomass is one of the critical drivers of the circular economy. Biogas has enormous renewable energy potential and has multitudes of applications in today’s energy-intensive society. Oil cakes, a known Agri-waste, are the by-product of oil processing, and are rich in nutrients. The edible oil cakes mostly have been used as a cattle feed; however, non-edible oil cakes do not find many applications. Their production is continuously escalating as non-edible oils are increasingly used in biodiesel production. Recently, there is a lot of emphasis on biogas production from these oil cakes. This paper reviews in detail biogas production from both edible and non-edible oil cakes. Chemical composition and various other applications of the cakes are also reviewed in brief. The survey illustrates that multiple parameters such as inoculum sources, co-digestion and reactor design affect the biogas production. All those factors, along with biogas upgrading and the economy of the process, are reviewed. Finally, future research opportunities are suggested to improve the viability of the biogas production from oil cakes.

循环经济是可持续发展的核心。从大量农业废弃物生物质中产生沼气是循环经济的关键驱动力之一。沼气具有巨大的可再生能源潜力，在当今能源密集型社会中有多种应用。油饼是一种众所周知的农业废弃物，是油脂加工的副产品，营养丰富。食用油饼大多用作牛饲料；然而，非食用油饼的应用并不多。随着非食用油越来越多地用于生物柴油生产，它们的产量不断增加。最近，人们非常重视从这些油饼中生产沼气。本文详细回顾了食用油饼和非食用油饼的沼气生产。还简要回顾了蛋糕的化学成分和各种其他应用。调查表明，接种源、共消化和反应器设计等多个参数会影响沼气生产。所有这些因素，连同沼气升级和过程的经济性，都得到了审查。最后，建议未来的研究机会提高油饼生产沼气的可行性。