Chiu Sam L H, Lo Irene M C
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.
Environ Sci Pollut Res Int. 2016 Dec;23(24):24435-24450. doi: 10.1007/s11356-016-7159-2. Epub 2016 Jul 5.
In this paper, factors that affect biogas production in the anaerobic digestion (AD) and anaerobic co-digestion (coAD) processes of food waste are reviewed with the aim to improve biogas production performance. These factors include the composition of substrates in food waste coAD as well as pre-treatment methods and anaerobic reactor system designs in both food waste AD and coAD. Due to the characteristics of the substrates used, the biogas production performance varies as different effects are exhibited on nutrient balance, inhibitory substance dilution, and trace metal element supplement. Various types of pre-treatment methods such as mechanical, chemical, thermal, and biological methods are discussed to improve the rate-limiting hydrolytic step in the digestion processes. The operation parameters of a reactor system are also reviewed with consideration of the characteristics of the substrates. Since the environmental awareness and concerns for waste management systems have been increasing, this paper also addresses possible environmental impacts of AD and coAD in food waste treatment and recommends feasible methods to reduce the impacts. In addition, uncertainties in the life cycle assessment (LCA) studies are also discussed.
本文综述了影响食物垃圾厌氧消化（AD）和厌氧共消化（coAD）过程中沼气产量的因素，旨在提高沼气生产性能。这些因素包括食物垃圾共消化中底物的组成，以及食物垃圾AD和coAD中的预处理方法和厌氧反应器系统设计。由于所用底物的特性，沼气生产性能会有所不同，因为在营养平衡、抑制性物质稀释和微量金属元素补充方面会表现出不同的影响。本文讨论了各种预处理方法，如机械、化学、热和生物方法，以改善消化过程中的限速水解步骤。还结合底物特性对反应器系统的运行参数进行了综述。由于对环境的认识以及对废物管理系统的关注不断增加，本文还讨论了AD和coAD在食物垃圾处理中可能产生的环境影响，并推荐了减少这些影响的可行方法。此外，还讨论了生命周期评估（LCA）研究中的不确定性。
