序批式生物膜法同步除磷脱氮特性研究

Characteristics Study on the Simultaneous Phosphorus and Partial Nitrogen Removal in Sequencing Batch Reactor of Submerged Biofilm Process

对淹没序批式生物膜法去除有机物和磷及同步部分脱氮的特性进行了研究。其适合的载体装填密度为30 % ,水力停留时间为 9h ,其中厌氧 3h、好氧 6h。进水COD负荷从 0 .2 7kg/(m3.d)到 1.32kg/(m3.d)均可使除磷率达 90 %以上、脱氮率达 5 0 %～ 6 0 %。淹没式生物膜法除磷脱氮工艺中的优势菌属为假单胞菌属 ,其次依顺序为气单胞菌属、芽孢杆菌属、微球菌属、硝化杆菌属。生物膜具有生物量大 (MLVSS达 5 5 31.7mg/L)、脱落污泥含磷量高 (达 5 .6 7% )、沉降性好 (SVI为 10 1.7)的特点 ,污泥产率为 0 .1996kg干泥

The Submerged Biofilm SBR system has been developed in the study for removing organic and phosphorus simultaneously with partial nitrogen removal by such operating procedure: The suitable applied carriers package percentage was 30% , and the hydraulic retention time was 9 hours which included 3 hours in anaerobic reaction section and 6 hours in aerobic reaction section.When the influent COD loading rate increased from 0.27 kg/(m 3.d ) to 1.32kg/(m 3.d),the phosphorus removal efficiency reached over 90%, and the nitrogen removal 50-60%. it is certain that the dominant phosphorus removal bacterial species is Pseudomonas and then Aeromonas, Bacillus, Micrococcus, Nitrobacter in the submerged biofilm process.The sludge had high phosphorus content of 5.67% , high biomass with MLVSS of 5531.7mg/L and good settling characteristics with SVI of 101.7 and 0.1996kgDS/kgCOD of sludge production