EGSB反应器的启动运行研究

On Startability of EGSB Reactor

采用两个小试规模的EGSB(ExpandedGranularSludgeBed)反应器 ,分别接种厌氧絮状污泥和颗粒污泥来研究其启动规律。试验结果表明 ,接种厌氧絮状污泥的R1反应器 ,由于出水循环的采用导致严重的污泥流失 ,首先应按UASB反应器的运行方式培养出颗粒污泥后 ,再按EGSB反应器方式运行 ,共需 78d才能完成启动 ;接种厌氧颗粒污泥的R2反应器 ,采用适宜的回流比有利于细菌的生长和反应器运行效果的改善 ,在经过短暂的无回流驯化后 ,即可按EGSB运行方式启动运行 ,仅需 32d即完成启动。

Two bench scale expanded granular sludge bed (EGSB) reactors inoculated of flocculants (R1) and granules (R2) of anaerobic sludge were conducted to research their startability of wastewater treatment processes. The results of the experiment show that the startup of reactor R1 spent in 78 days totally because much sludge lost as a result of effluent recycling and so it had to operate as UASB reactor first to make up sludge granules and then operated as EGSB; the reactor R2 with suitable recycling rate was favorable to bacteria growth and operated normally, after short time without recycling for sludge assimilation, the EGSB started up successful only in 32 days.