摘要
试验以普通活性污泥为接种污泥,以人工配制的无机氨氮废水为基质,对比研究了SBBR与SBR单级自养脱氮工艺的启动。结果表明,两组反应器都经历了污泥适应期、部分亚硝化选择期和自养脱氮实现期三个阶段。SBBR经50d的运行成功启动单级自养脱氮工艺,氨氮平均去除率和总氮平均去除率分别为98.68%和80.87%,总氮去除速率为0.17kg-N/(m~3·d)。SBR经113d的运行成功启动单级自养脱氮工艺,氨氮平均去除率和总氮平均去除率分别为97.58%和83.50%,总氮去除速率为0.28kg-N/(m~3·d)。SBBR生物相多样化且生物量高,此外由生物膜表面到其内部存在溶解氧浓度梯度,相应地有好氧区、缺氧区和厌氧区,可以为厌氧氨氧化菌提供稳定、适宜的生存条件,所以SBBR更适合作为单级自养脱氮工艺启动的反应器。成功启动单级自养脱氮工艺之后:SBBR内大部分污泥附着在填料上,颜色呈浅褐色,而反应器内壁及出水管上附着的污泥呈浅砖红色;SBR内存在颗粒污泥和絮体污泥两种形态,絮体污泥为浅黄色,颗粒污泥为砖红色。
引文
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