Biogas production from different lignocellulosic biomass sources: advances and perspectives

Abstract

The present work summarizes different sources of biomass used as raw material for the production of biogas, focusing mainly on the use of plants that do not compete with the food supply. Biogas obtained from edible plants entails a developed technology and good yield of methane production; however, its use may not be sustainable. Biomass from agricultural waste is a cheap option, but in general, with lower methane yields than those obtained from edible plants. On the other hand, the use of algae or aquatic plants promises to be an efficient and sustainable option with high yields of methane produced, but it necessary to overcome the existing technological barriers. Moreover, these last raw materials have the additional advantage that they can be obtained from wastewater treatment and, therefore, they could be applied to the concept of biorefinery. An estimation of methane yield per hectare per year of the some types of biomass and operational conditions employed is presented as well. In addition, different strategies to improve the yield of biogas, such as physical, chemical, and biological pretreatments, are presented. Other alternatives for enhanced the biogas production such as bioaugmentation and biohythane are showed and finally perspectives are mentioned.

Investigation of the biogas production potential from algal wastes

“…As seen in Table 3, the methane yields obtained from our results are lower than the other agricultural substrates, such as food wastes and cattle manure. The reason for this situation is that the C:N ratio of algal biomass is not in the optimum range (Martínez-Gutiérrez, 2018). In order to overcome this disadvantage, co-digestion of algae with different wastes is recommended by researchers (Leonzio, 2018).…”

Biological Pretreatment Strategies for Second-Generation Lignocellulosic Resources to Enhance Biogas Production

“…Parthiba Karthikeyan et al [48] found that biological pretreatments are not yet available for food wastes and demand urgent need for further research. Increased cellulase and dehydrogenase activity compared to control More than 2-fold increase in methane production [84] 1 wrf: white rot fungi; brf: brown rot fungi; srf: soft rot fungi; 2 a: incubation period, b: incubation temperature, c: moisture content in %, d: humidity in %; 3 inoculation with e: submerged fungal culture, f: fungal spores, g: autoclaved substrate overgrown by fungal mycelia; autoc: autoclaved substrate, orig: original, unmodified substrate; 4 batch: batch system, cont: continuous system, ssAD: solid-state anaerobic digestion, mp: mesophilic conditions, tp: thermophilic conditions, t: anaerobic incubation period or hydraulic retention time in days; 5 according to Klein and Eveleigh [90].…”

“…Biogas production from anaerobic digestion (AD) processes is considered as an attractive source for green energy [3,4] and, therefore, endeavors have been made to increase the share of biogas in global energy production. During anaerobic digestion, organic feedstocks are converted into biogas containing methane (CH 4 ) as a valuable end-product.…”

Integration of Green Energy and Advanced Energy-Efficient Technologies for Municipal Wastewater Treatment Plants

“…Therefore, it is necessary to use a lifting pump to lift the sewage into the treatment system [64]. This process could be energy intensive, the main reasons for the high energy consumption of the pumps in sewage treatment plants is the incorrect pump design or selection [65]. Energy consumption can be improved by designing proper pumps in a right position.…”