好氧颗粒污泥反应器快速启动及除碳脱氮试验

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

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1．5mg／L左右，15d即完成反应器快速启动。形成的好氧颗粒污泥粒径1．5-2．5mm，SVI值54mL／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。

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.