青岛麦岛污水处理厂污泥消化及热电联产运行管理经验

污泥厌氧消化/热电联产是一项重要节能工艺技术,对于提高资源和能源利用效率意义重大。完善的管理是保证污泥消化及热电联产系统稳定高效运行的关键环节。麦岛污水处理厂将Multiflo~?Trio初沉污泥与生物滤池剩余污泥进行混合,形成沼气产率较高的混合污泥,并进行中温厌氧消化,所产沼气进入热电联产系统用于发电及沼气锅炉,回收余热作为污泥消化及厂区采暖热源。10余年来,麦岛污水处理厂的污泥消化及热电联产系统实现了安全、稳定、高效的运行,保证了污泥的资源化、减量化、无害化处理及利用。介绍了青岛麦岛污水处理厂污泥厌氧消化及热电联产的运行情况,探讨如何在污泥消化及热电联产间做好运行管理和调控,使之形成良性循环。

Experience of Sludge Digestion and Cogeneration Operation Management in Qingdao Maidao Sewage Treatment Plant

Anaerobic digestion and cogeneration operation of sludge is an important energy saving technology,which is of great significance in improving the utilization efficiency of resources and energy.Perfect management is the key to ensure the stable and efficient operation of sludge digestion and cogeneration system.The Multiflo~?Trio primary sludge was mixed with the excess sludge of the biofilter to form the mixed sludge with high biogas yield.And then,the biogas produced by mesophilic anaerobic digestion was utilized for generators and gas boiler via the cogeneration system,and the waste heat was recovered as sludge digestion and heating heat source in the plant area.For more than 10 years,the operation of this management system was safe,stable and efficient,and the sludge resource utilization,reduction,innocuous treatment and utilization were realized.This paper introduced the operation of sludge anaerobic digestion and cogeneration in Qingdao Maidao sewage treatment plant,and discussed how to achieve good operation management and regulation between sludge digestion and cogeneration,so as to form a virtuous cycle.