包埋固定化活性污泥脱氮特性与微生物群落分析
发布时间：2018-09-06 08:10
【摘要】：采用包埋固定化活性污泥法进行污水深度处理脱氮,针对不同初始总氮浓度的模拟废水,基于序批式间歇反应器的小试实验,探讨了包埋颗粒的脱氮效果及其微生物种群特性.结果表明,在包埋颗粒的体积投加率为10%,实验水温为10~15℃,DO为2~4 mg·L~(-1)和初始COD浓度为80~100 mg·L~(-1)条件下,不同初始总氮浓度(10~45 mg·L~(-1))和C/N比(1.78~10)的各反应器中,稳定期包埋颗粒的最大总氮去除负荷为7.78~23.18 mg·(L·h)~(-1).扫描电镜发现,包埋颗粒具有较好的孔隙结构,且颗粒内部与表面均存在微生物附着生长,已成为微生物的良好载体.高通量测序结果表明,较初始包埋污泥,包埋颗粒内部与表面的微生物群落构成发生了显著变化,包埋颗粒内微生物多样性良好,颗粒中脱氮菌属优势明显.包埋颗粒中存在异养硝化-好氧反硝化菌属,提升了包埋颗粒内非传统生物脱氮途径的潜能.
[Abstract]:The denitrification of wastewater by immobilized activated sludge was studied in this paper. The denitrification effect and microbial population characteristics of the entrapped particles were discussed based on the experimental results of sequencing batch reactor for simulated wastewater with different initial total nitrogen concentrations. The results show that under the conditions of 10% volume addition of embedded particles, 1015 鈩，
本文编号：2225749
[Abstract]:The denitrification of wastewater by immobilized activated sludge was studied in this paper. The denitrification effect and microbial population characteristics of the entrapped particles were discussed based on the experimental results of sequencing batch reactor for simulated wastewater with different initial total nitrogen concentrations. The results show that under the conditions of 10% volume addition of embedded particles, 1015 鈩，
本文编号：2225749
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