反应温度对自热式高温好氧消化(ATAD)中试系统运行的影响

城市污水污泥是城市污水处理厂的副产物,需要稳定化处理。本试验设计了由2个圆罐串联的自热式高温好氧消化中试系统处理城市污水污泥。通过批式试验探讨反应器温度对污泥稳定化处理效果的影响,以及影响反应器自升温的因素。试验发现①反应温度对挥发性的有机物的去除有显著影响,反应温度越高,VSS去除率越高。②影响反应温度的主要因素有进泥浓度、消化时间和曝气量。当进泥的VSS浓度为37.2g/L时,ATAD反应器最高温度可到49℃,只需14～17d的消化时间VSS的去除率可达到41.7%,污泥能达到稳定化。

THE INFLUENCE OF REACTOR TEMPERATURE ON AUTOTHERMAL THERMOPHILIC AEROBIC DIGESTION

Biosolids was produced by sewage plant in the course of treatment urban sewage.A pilot scale facility of atuothermal thermophilic aerobic digestion(ATAD) was designed for stabilization of the biosolid.The affect of reactor temperature on stabilization of the biosolid and main factors affecting reactor temperature increasing were studied by the way of batch operation.The results showed:a.the remarkable effects of reactor temperature on the removal of volatile suspended solid(VSS) were obtained.And a higher reactor temperature produces a higher removal of VSS.b.Factors of reactor temperature were Influenced by influent total suspended solid,digestion time and aeration rate.Biosolid was stabilized when the highest reactor temperature and the removal of VSS were 49 ℃ and 41.7% respectively under the conditions of 37.2 g/L of influent VSS and 14～17 d of digestion time.