剩余污泥预处理技术概览

全球气候大会以及中国政府在CO2减排方面的承诺使剩余污泥厌氧消化产生能源这一老生常谈的问题再次受到关注.污泥生物细胞裂解/水解是限制厌氧消化效率的重要瓶颈,而污泥预处理技术可有效提高细胞破裂、水解效果,最大限度地发掘出剩余污泥中的有机能源.目前全球研发的污泥预处理技术多种多样,其中既有具备工程应用经验的超声波、聚焦脉冲...

Review of pretreatment technologies for excess sludge

Energy production from excess sludge of biological wastewater treatment by anaerobic digestion has been once again emphasized after the Copenhagen summit conference on the global climate change. Disruption and/or hydrolysis of bacterial cells is a bottleneck limiting the efficiency of anaerobic digestion, but suitable pretreatment for excess sludge could enhance disruption and/or hydrolysis of bacterial cells and thus explore greatly the potential green energy from excess sludge. Nowadays, there have been many pretreatment technologies of excess sludge available in the world. Among them, many pretreatment technologies, such as ultrasonic and focused pulsed methods, have been already applied to engineering. Moreover, there are also some developing technologies, such as thermal hydrolysis and alkaline pretreatment, and biological agents added in excess sludge have been in research and development. With this article, pretreatment technologies are categorized as physical/mechanical, chemical, biological and combined pretreatment methods, which are in detail described for their theories, characteristics, and progresses on R & D and prospects of application.