“…Gao et al Accelerating the degradation of lignin and subsequent methanogenesis in lignocellulosic waste is required to help to confine methane production to a shorter period of higher concentration release, thus allowing more landfill biogas to be collected as energy and preventing low emission of GHG in the long term. This can be addressed with biotechnological methods in two main waysthe application of extracellular enzymes [33][34][35] or enzyme-producing microorganisms [36][37][38][39]. However, these previously mentioned studies have been carried out under laboratory level with highly controlled conditions or standardized materials, scaling-up these technologies to landfill conditions will be highly challenging and is yet to attract significant attention.…”