The process of anaerobic digestion consists of three steps. 厌氧消化包括三个步骤。
Biogas generated from the sludge digestion in wastewater treatment plants is a potential clean energy source, which can be recycled in several ways. 摘要城市污水处理厂中污泥厌氧消化产生的沼气是一种很有潜力的清洁能源。
