摘要
以普通絮状活性污泥为接种污泥 ,葡萄糖为碳源 ,在序批式反应器中培育出好氧颗粒污泥 .增加COD负荷的同时 ,减少沉降时间以造成选择压 ,强化好氧颗粒污泥的形成 .根据污泥的形态变化 ,颗粒污泥的形成可分为 3个阶段 .反应器启动 67d出现颗粒污泥 .COD负荷 4 8kg/(m3·d)、表面气体流速 0 0 1 75m/s时 ,反应器中活性污泥完全颗粒化 .颗粒污泥粒径大多 6～ 9mm ,MLSS 780 0mg/L ,最小沉降速率 3 2 7m/h .好氧颗粒污泥具有在高负荷下良好的COD去除率 .
As inoculum sludge from a conventional COD removal activated sludge wastewater treatment plant was used, aerobic granular sludge was cultured in sequencing batch reactor (SBR) fed with glucose as carbon substrate. The SBR was operated with decreasing sedimentation time and increasing COD loading rate resulting in the selective pressure to enhance the formation of granular sludge. According to morphology change of sludge, the generation of granule could be divided into three stage. Granules started to appear after 67 days operation. After increasing COD loading rate to 4 8 kg/(m 3·d), and superficial gas velocity to 0 0175m/s,granules were the dominant sludge forms with diameter about 6～9mm, the minimal settling velocity of 32 7m/h, and the MLSS of 7800mg/L. Aerobic granular sludge demonstrates high activity and ability to withstand high COD loading rate. The properties of aerobic granular sludges and the effect of different operational conditions on the formation of these aerobic granules were also analyzed preliminarily.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第4期99-104,共6页
Environmental Science
基金
江苏省环境科学与工程重点实验室开放课题资金资助
关键词
好氧颗粒污泥
选择压
颗粒化过程
序批式反应器
影响因素
aerobic granular sludge
selective pressure
granulation
sequencing batch reactor
influential factor
