腐殖生态基强化SBR工艺脱氮除磷效能及微生物特性的研究
发布时间：2018-08-06 18:35
【摘要】：腐殖生态基对强化活性污泥工艺脱氮除磷和改善活性污泥性质方面具有较好的作用。本文在考察腐殖生态基对SBR工艺脱氮除磷效能影响的基础上,通过设置不同水温、不同运行方式来研究水温和运行方式对腐殖生态基SBR工艺污染物去除效果的影响,并利用高通量测序方法研究微生物群落结构的变化,为该工艺的进一步发展与应用提供一定的理论基础。外置SBR和传统SBR在25℃水温条件下对比试验结果表明,腐殖生态基对SBR工艺COD的去除影响不大,但对NH4+-N和TP的去除率分别提高了5.9%和7.4%。水温分别控制在10℃、15℃、25℃的外置SBR对比试验结果表明,水温对COD的去除情况影响不大,水温升高有利于NH4+-N的去除,但不利于TP的去除。高通量测序分析结果表明,温度的升高有利于微生物菌群丰度和多样性的提高。三反应器活性污泥样品中Rhodocyclaceae的相对丰度分别为20.62%、15.22%、11.34%,Aeromonas的相对丰度分别为2.12%、0.81%、0.1%,均随水温的升高呈递减趋势,而Comamonadaceae的相对丰度分别为3.65%、4.16%、10.42%,随水温的升高呈递增趋势,这与不同水温下NH4+-N和TP去除效果的变化相一致。外置SBR和内置SBR在25℃水温条件下的对比试验结果表明,腐殖生态基外置和内置对COD的去除效果差别不大,而对NH4+-N、TP的去除,内置反应器分别高于外置反应器2.2%、3.8%,可见腐殖生态基内置有利于氨氮和总磷的去除。高通量测序分析结果表明,内置反应器的微生物丰富要优于外置反应器,而多样性无明显区别。内置反应器活性污泥样品中Rhodocyclaceae、Xanthomonadaceae的相对丰度分别高于外置样品4.27%、1.9%,这与腐殖生态基内置有助于除磷相一致。内置样品中Comamonadaceae、Thauera的相对丰度分别高于外置样品2.82%、4.26%,这与腐殖生态基内置有助于氨氮的去除相一致。好氧/厌氧与厌氧/好氧两种运行方式的内置SBR系统在10℃水温条件下对比试验结果表明,好氧与厌氧的顺序,对系统COD、TP的去除率影响不大,但由典型周期变化规律可知好氧/厌氧SBR系统COD、TP的降解速率要快于厌氧/好氧运行方式,而对于NH4+-N的去除,好氧/厌氧要高于厌氧/好氧4.3%左右,有利于氨氮的去除。高通量测序分析结果表明,好氧/厌氧反应器的微生物菌群丰度和多样性都大于厌氧/好氧反应器。Aeromonas较原泥分别增长了5.02%、1.79%,Thauera较原泥分别增长了3.49%、2.71%,Comamonadaceae较原泥分别升高了4.74%、2.72%。这与好氧/厌氧条件下NH4+-N和TP较好的去除效果相一致。
[Abstract]:Humic ecological base plays a better role in denitrification and phosphorus removal of activated sludge process and improving the properties of activated sludge. On the basis of investigating the effect of humic ecological base on nitrogen and phosphorus removal efficiency of SBR process, the effects of water temperature and operation mode on the removal of pollutants from humic ecological SBR process were studied by setting different water temperature and different operation mode. The changes of microbial community structure were studied by high-throughput sequencing method, which provided a theoretical basis for the further development and application of this process. The results showed that humic ecological base had little effect on COD removal of SBR process, but the removal rates of NH4 N and TP were increased by 5.9% and 7.4% respectively. The results of external SBR experiments with water temperature controlled at 10 鈩，
本文编号：2168625
[Abstract]:Humic ecological base plays a better role in denitrification and phosphorus removal of activated sludge process and improving the properties of activated sludge. On the basis of investigating the effect of humic ecological base on nitrogen and phosphorus removal efficiency of SBR process, the effects of water temperature and operation mode on the removal of pollutants from humic ecological SBR process were studied by setting different water temperature and different operation mode. The changes of microbial community structure were studied by high-throughput sequencing method, which provided a theoretical basis for the further development and application of this process. The results showed that humic ecological base had little effect on COD removal of SBR process, but the removal rates of NH4 N and TP were increased by 5.9% and 7.4% respectively. The results of external SBR experiments with water temperature controlled at 10 鈩，
本文编号：2168625
本文链接：https://www.wllwen.com/shengtaihuanjingbaohulunwen/2168625.html
