含油污泥高温好氧发酵研究

STUDY ON THERMOPHILIC AEROBIC FERMENTATION OF OILY SLUDGE

探讨了含油污泥高温好氧发酵的可行性,研究了不同发酵方式、外加营养成分以及回用发酵腐熟料对污泥稳定化和无害化的影响程度.结果表明：脱水含油污泥添加鸡粪等营养成分后可实现快速发酵升温和稳定化,油类去除率可达60％左右;采用厌氧与好氧联合发酵的方式时油类的降解率并不比直接好氧发酵法高;发酵腐熟料可直接回用作为含油污泥好氧发酵的部分调节剂和膨松剂.含油污泥高温好氧发酵的建议参数为：反应仓的通风量控制在0.025～0.050 m3/（m3·h）,含油污泥与鸡粪等禽畜粪便的体积比为3∶1.

The effect of the anaerobic-aerobic fermentation and the function of addition of fowl ma- nure as nutrients on the stabilization and harmlessness of oily sludge as well as composted sludge recy- cling were studied during the investigation of the possibility of thermophilic aerobic fermentation of oily sludge. It is shown by the results that the dewatered oily sludge mixed with additional fowl manure nu- trients can be effectively fermented and stabilized by thermophilic aerobic method with an efficiency of oil removal about 60% or more. However, the oil removal by anaerobic-aerobic fermentation is not signifi- cantly better than by direct aerobic fermentation; the composted sludge can partly replace the nutrients and bulking agent during oily sludge aerobic fermentation. It is suggested that the optimized parameters of oily sludge aerobic fermentation are. air supplying rate from 0. 025 m3/（m3 · h） to 0. 050 m3/（m3 · h）, the volumetric ratio of oily sludge to fowl manure nutrients of 3 ： 1.