【摘要】 采用膨胀颗粒污泥床(EGSB)处理涤纶仿真丝绸印染废水,通过污泥负荷和水力负荷的递增来启动反应器,从活性污泥性状和反应器性能两方面考察启动过程.活性污泥依次经历絮状、膨胀、细粒化和成熟颗粒四个阶段,反应器性能与此相应变化,有机物去除率和产气率逐渐提高且趋于稳定.结果表明,EGSB处理涤纶仿真丝绸印染废水的启动过程用了5 0 d左右,启动后形成的颗粒污泥床层占反应器有效容积的2 5 %和污泥量的6 5 %左右,COD去除率为5 7%～6 4 % ,产气率为0 .12～0 .17m3·(kg COD) - 1 .污泥的分化与颗粒化、稳定的有机物去除率与产气率是反应器完成启动的标志.更多还原

【Abstract】 Expended granular sludge bed (EGSB) reactor was used to treat terylene artificial silk printing and dyeing wastewater in a lab-scale. The character of activated sludge and performance of the reactor were applied to assess the reactor start-up, which was initiated when sludge load and hydraulic load were increased step by step. Before the start-up was finished, activated sludge was developed from flocculent sludge to bulking sludge, granule sludge and mature granular stage. The granular sludge bed was in charge of 65% of total sludge mass in the reactor, whereas occupying only 25% of the reactor volume after reactor start-up. Correspondingly, the efficiency of organic removal and production rate of biogas increased gradually and become more stable. The results showed that the efficiency of COD removal increased to 57%-64%, pH stabilized in a range of 7.99~8.04, and production rate of biogas was relatively high and stable. About 50 days were spent for EGSB reactor start-up. Granulated Sludge, relatively high efficiency of COD removal and stable production rate of biogas indicated the success of EGSB reactor start-up.更多还原