好氧颗粒污泥反应器快速启动及除碳脱氮试验

为快速启动好氧颗粒污泥反应器,在SBR反应器中同时接种硝化污泥和厌氧颗粒污泥,控制反应条件,温度23~25℃,pH值7.5~8.5,DO质量浓度1.5 mg/L左右,15 d即完成反应器快速启动。形成的好氧颗粒污泥粒径1.5~2.5 mm,SVI值54 mL/g。颗粒污泥结构紧密,沉降性能良好。反应器连续运行40多天,改变进水COD及NH4+-N浓度,COD和NH4+-N去除率均能稳定在80%以上,反应器内发生了同步硝化反硝化过程。

Experiment on rapid start-up and removal of carbon and nitrogen in aerobic granular sludge reactor

In order to rapidly start up the aerobic granular sludge reactor, the nitrited sludge and anaerobic granular sludge were inoculated simultaneously in a sequencing batch reactor. When the temperature was 23 -25℃, the pH value was 7.5 - 8.5 and the DO was 1.5 mg/L, the reactor was started rapidly after 15 days. The average diameter of the produced aerobic granule was 1.5 ~ 2.5mm, the SVI value was 54mL/g, and the granule sludge was compact with good settleability. When the reactor had been nmning continuously for more than 40 days with different COD and NH4^＋ -N concentrations in the influents, the carbon and nitrogen removal rate exceeded 80%. The test results showed that nitrification and denitrification occurred simultaneously in this reactor.