改进型ABR处理太湖富藻水启动研究

在传统ABR反应器格室内添加弹性填料,考察改进型ABR反应器处理太湖富藻水的启动运行,研究格室中微生物特性.试验结果表明:反应器采用"投加接种污泥、静置培养,阶梯提高负荷"的启动运行方式,可以在40d内实现蓝藻成果处理.稳定运行时,反应器对蓝藻化学需氧量(COD)去除率在75%左右,容积产气率在65.9mL/L.d左右,藻毒素的去除率达到90%;改进型ABR反应器中弹性填料这一生物载体在处理蓝藻成功启动中起到关键作用,有利于生物膜的形成,加速反应器中颗粒污泥的驯化,促进反应器格室中微生物产酸细菌与产甲烷菌合理有序的空间分布,从而使反应器具有明显的相分离特征.反应器内格室中污泥蛋白酶活性沿格室沿程递减,而辅酶F420呈递增趋势,这和反应器中细菌与古菌数量变化趋势相对应.

Start-up Research on Cyanobacteria in Taihu Lake Treatment by the Improved Anaerobic Baffle Reactor

The start-up tests and micro-ecological conditions of treating cyanobacteria in the Taihu Lake by an anaerobic baffled reactor (ABR) filled with soft filler have been studied. The results showed that, under the following conditions of dosing seed sludge, continuous operation by improving the load by steps after 40 days, the cyanobacteria could be successfully processed. In the process of start-up, the COD (chemical oxygen demand) removing rate was about 75%, and the gas production rate was about 65.9mL/L.d. In addition, the reduction rate of microcystins reached 90%. The soft filler played a key role in treating cyanobacteria successfully by the improved Anaerobic Baffle Reactor. It was found that the soft filler had function in forming biofilm and training granular sludge in the reactor. In addition, it is beneficial in promoting the more reasonable space distribution of the microbial communities in the compartments. The protease content of the granular sludge in ABR decreased and coenzyme F420 content increased progressively along separation chambers. It is consistent with the quantity of archaea and bacteria along the separation chambers in the reactor.