SBBR的原位生物解偶联污泥减量系统的构建

Construction of Sludge Reduction System with In-situ Biological Uncoupling in SBBR

通过对SBBR反应器充氧方式的调控来构建原位生物解偶联污泥减量系统,考察了充氧方式对SBBR反应器污泥产量和处理效能的影响。结果表明,在水温为25℃、挂膜密度为45%、负荷为1 kgCOD/(m3.d)、DO为5 mg/L的条件下,采用曝气30 min/停曝30 min的充氧方式能强化生物膜中的生物解偶联作用,构建出原位生物解偶联系统,污泥产率小,并且出水水质达标。当反应器分别采用曝气30 min/停曝30 min、曝气15 min/停曝15 min和连续曝气时,其平均污泥产率依次为0.03、0.07和0.08 kgMLSS/(kgCOD.d),与传统活性污泥法相比,其污泥产率分别减少了90%、77%和73%。

A sludge reduction system with in-situ biological uncoupling was constructed by controlling the aeration mode in SBBR. The influence of aeration mode on sludge yield and treatment efficiency in SBBR was investigated. The results show that under the conditions of temperature of 25 ℃, biofilm density of 45% , organic loading of 1 kgCOD/（ m3 · d） and DO of 5 rag/L, the aeration mode of 30 rain aeration/30 min non-aeration can enhance biological uncoupling effect in the biofihn. The constructed in- situ biological uncoupling system has low sludge yield and enables the effluent to meet the discharge standard. When the aeration modes are 30 min aeration/30 rain non-aeration, 15 min aeration/15 rain non-aeration, and continuous aeration respectively, the average sludge yields are 0. 03, 0.07 and0. 08 kgMLSS/（kgCOD · d） respectively, and the sludge yields are reduced by 90% , 77% and 73% respectively compared with traditional activated sludge process.