文档介绍：哈尔滨工业大学工学硕士学位论文
摘要
随着经济的发展和人们生活水平的提高,表面水体受到很严重的污染。氮
磷是促使藻类以及其他进行光合作用的微生物生长的关键性营养物质,为了避
免水体的富营养化必须将其从污水中去除。在全世界范围内,越来越多的人意
识到控制氮磷排放的必要性,这也体现在日趋严格的排放标准上,因此人们在
污水处理中增加了脱氮除磷功能。很多污水处理工艺正面临着如何提高脱氮除
磷效果的难题。高浓度生物相曝气池不仅具有很好的脱氮除磷效果,还具有耗
能少、产泥量低等优点,对其他污水处理厂的新建或改造具有很大的参考价值。
高浓度生物相曝气池在低溶解氧,高污泥浓度下运行,在同一反应池中实
现了脱氮除磷效果。大比例的混合液回流,使该曝气池兼具推流式和完全混合
式的一些优点,整个流程中污染物质浓度梯度很小。高浓度生物相曝气池在低
污泥负荷条件下运行,活性污泥中微生物处于内源呼吸期,污泥颗粒较小,在
低溶解氧高污泥浓度下不会产生污泥膨胀现象,且产泥量低。
溶解氧和污泥浓度对该系统影响很大,分析结果表明,溶解氧的增加对硝
化作用和反硝化作用都起到促进作用,但是却抑制了除磷效果。高污泥浓度促
进了脱氮除磷效果。当溶解氧控制在 ~ , 污泥浓度控制在
6000~7000mg/L 时,系统处理效果最佳。对 CODCr、TN、TP 的去除率分别达
到 92%、81%、97%,CODCr、TN、TP 的平均出水浓度为、、
。
该系统具有很好的抗冲击负荷能力,在水质水量波动较大时依然能保证出
水水质达标排放。在冬季水温较低时,脱氮除磷效果依然很显著。

关键词:低溶解氧;高浓度活性污泥;大比例混合液回流

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哈尔滨工业大学工学硕士学位论文
Abstract
With the development of economy and improvement of people’s living,surface
water has been seriously polluted in China. Nitrogen(N) and phosphorys(P) are the
key nutrients that stimulate the growth of algae and other photosynthetic
anisms,and must be removed from wastewater to avoid eutrophication in
aquatic water the world,a growing awareness of the need to
control N and P emissions, which is reflected in increasingly stringent regulations,
has made N and P removal widely employed in wastewater treatment. A great many
wastewater treatment plants have to face with the advanced removal of N and P. The
aeration tank with high biomass concentrations promotes the removal of N and P
from wastewater with less energy consumption and low sludge production, which
has great reference value for the other wastewater treatment plants.
The aeration tank running under low dissolved oxygen(~)and high
mixed liquor suspended solids(MLSS,5000~8000mg/L),has achieved the removal of
N and P in the same time. It has some advantages of the plug flow and plete
mixing,because of the high internal mixed liquor recirculation. The gradient of
poll