C/N比对好氧颗粒污泥性能的影响  

Effect of C/N ratio on properties of aerobic granular sludge

作　　者：赵霞[1,2] 冯辉霞[1] 雒和明[1] 陈忠林[2] 姜峰[1] 赵阳丽[1] 

机构地区：[1]兰州理工大学石油化工学院,兰州730050 [2]哈尔滨工业大学市政环境工程学院城市水资源与水环境国家重点实验室,哈尔滨150090

出　　处：《环境工程学报》2012年第11期3928-3932,共5页Chinese Journal of Environmental Engineering

基　　金：国家创新研究群体科学基金资助项目(51121062);国家自然科学基金资助项目(5126803);兰州理工大学优秀青年教师培养计划(1005ZCX016)

摘　　要：在SBR内接种活性污泥,研究了进水C/N比对好氧颗粒污泥的影响。结果表明,在高C/N比的条件下污泥不易快速颗粒化,沉降性能差,低C/N比有利于反应器内微生物的积累,MLSS最高可达8 740 mg/L,然而过低的C/N比将导致颗粒粒径增加,结构疏松以致解体,丝状微生物过度繁殖,不利于系统的稳定。对有机物的去除受进水C/N比的影响不明显,颗粒初步形成后对COD的去除率基本维持在87%左右;在C/N比为6.67～2.86之间时,除磷效果较好,平均去除率稳定在80%以上,而C/N比过高或过低,污泥颗粒化程度差,体系内缺乏除磷所需的微观环境,不利于磷的去除;进水C/N比对NH4+-N的去除效果影响明显,C/N比为10时,好氧颗粒污泥具有良好的脱氮效果,NH4+-N的平均去除率达90.59%,但低C/N比能抑制硝化菌和反硝化菌的活性,当进水C/N比由5降低至2时,反应器对NH4+-N的去除率由65.23%下降到38.77%。Flocculent activated sludge was used as the inoculated sludge and the effect of influent C/N ratio on the properties of granular sludge was studied in sequencing batch reactor（SBR）.The results indicated that the activated sludge couldn＇t granulate rapidly and had a poor settling ability at high influent C/N ratio.Microbe accumulated easily in the reactor at low C/N ratio and the mixed liquor suspended solid（MLSS） could be up to 8 740 mg/L.However,the excessive low C/N ratio would lead to the increase of particle diameter,the disintegration of dispersion sludge particles and the bulking of filamentous microbe,and these were not conducive to the stability of the system.The influent C/N ratio had little influence on the removal of organism,and the COD removal remained at about 87% after sludge particles formed preliminarily.The average phosphorus removal efficiency remained above 80% when C/N ratio was between 6.67 and 2.86.While the lower or higher C/N ratio could result in poor granulation and the lack of micro-environment,these were not useful for the phosphorus removal.On the other hand,the influence of influent C/N ratio on the ammonia nitrogen removal efficiency was obvious.Aerobic granular sludge had good simultaneous nitrification and denitrification performances,and the average NH＋4-N removal could reach 90.59% when C/N ratio was 10.However,when influent C/N ratio was decreased from 5 to 2 in the reactor,the activities of nitrification bacteria and denitrification bacteria were inhibited obviously,the NH＋4-N removal rate would reduce from 65.23% to 38.77%.

关 键 词：SBR 颗粒污泥 C N比 物理性能 除污效能 

分 类 号：X703[环境科学与工程—环境工程]