厌氧序批式反应器负荷特征与实际应用

摘要

应用厌氧序批式反应器(ASBR),接种厌氧颗粒污泥,以葡萄糖模拟废水为基质,探索ASBR反应器的最大容积负荷以及最大负荷特性;并通过处理实际淀粉废水和啤酒废水验证葡萄糖模拟废水阶段所达到的最大容积负荷.实验结果表明:恒温(37.5℃)条件下,通过调节碱度促进该反应器建立稳态.经过26 d的反应,葡萄糖模拟废水容积负荷由3 kg COD·m-3·d-1提升至高达8kgCOD·m-3·d-1;并且在短的水力停留时间(1 d)条件下,保持COD去除率超过80％.同时电镜扫描结果显示,不同负荷下的颗粒污泥形态差异比较大.负荷越高,颗粒污泥粒径越大,也更密实.同时基于模拟葡萄糖废水试验数据,使用ASBR反应器对淀粉废水和啤酒废水进行处理.同样展现出非常好的去除特性,为ASBR实际应用提供基础数据.%It was supposed to explore the maximum volume load of the ASBR and characteristic of maximum volume load after inoculating granule sludge with glucose as the simulated wastewater.Then actual starch wastewater and beer wastewater were used to verify the maximum volume load ofthe ASBR with glucose simulated wastewater.This experiment was carried out under the condition of constant temperature (37,5 ℃),and the reactor maintained steady state by adjusting the amount of alkalinity to the reactor.Research showed that:volume load of ASBR could be improved from 3 kg COD · m-3 · d-1 to as high as 8 kg COD · m-3 · d-1 during treating glucose simulated wastewater and kept the COD removal rate over 80％ in a relatively short hyduaulic retention time (1 d) conditions,through the cultivation of 26 days,.Electron microscope scanning results showed that there was a big difference among different volume load in sludge morphology.The granules would be larger and tighter with higher volume load.Meanwhile,based on the data of glucose simulated wastewater,ASBR reactor was used to treating actual starch wastewater and beer wastewater and also showed a very good remove rate,which laid a good foundation for practical application for ASBR.