Abstract:
Abstract: With the increasingly serious energy shortage and environmental pollution, anaerobic digestion of agricultural straws is one of the hotspots in recent years which the domestic and foreign scholars study on biomass solid waste treatment. Anaerobic digestion (AD) of agricultural straws provides an excellent chance to convert abundant bioresources into renewable energy. The anaerobic digestion of straws not only improve the quality of the rural ecological environment, also produced a clean energy, biogas, which made the solid biomass wastes into "wealth". Anaerobic digestion of straws is currently one of the most hope to realize the industrialization of biomass energy in China. However, the special physico-chemical property of straws creates a resistant for microorganism and enzymes to degrade during the hydrolytic acidification process and methanogenic process, and thus limited application and promotion of straws. Although the biogas equipment manufacture and biogas plants were established and encouraged by the incentive polices in China, some questions still existed in anaerobic digestion, especially for the large-scale application. According to the latest research results of the domestic and foreign on relevant anaerobic digestion of agricultural straws, this article mainly highlighted the current status of agricultural straws anaerobic digestion and discussed its challenges. Based on the anaerobic digestion principle and material characteristics, this paper was divided into five parts: 1) principle analysis of anaerobic digestion; 2) structural compositions of straws; 3) influence factors and shortages of anaerobic digestion of straws; 4) optimization of biogas and methane production; 5) prospect. This review paper will have a positive significance to promote anaerobic digestion of agricultural straws and to speed up the achievements transformation of utilization of biomass solid wastes.