FULL-SCALE APPLICATION OF NITROGEN REMOVAL WITH METHANOL AS CARBON SOURCE
FULL-SCALE APPLICATION OF NITROGEN REMOVAL WITH METHANOL AS CARBON SOURCE
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DOI：
10.2166/wst.1992.0549
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发表时间：
1992-01-01
影响因子：
2.7
通讯作者：
VILLADSEN, IS
中科院分区：
文献类型：
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作者：
NYBERG, U;ASPEGREN, H;VILLADSEN, IS
在瑞典，许多用于去除BOD和磷的先进污水处理厂必须扩展脱氮。由于现有的工厂配置和废水组成，反硝化与供应的外部碳源可以是一个具有成本效益的解决方案，在许多cases.At Klagshamn污水处理厂在马尔莫调查广泛的脱氮已在一个单一的污泥系统与预沉淀和反硝化后，甲醇被添加到反硝化。试验结果表明，该工艺脱氮效果好，运行稳定，操作简便。该工艺的应用程序提供了更少的补充成本，为延长脱氮比升级的工厂与更大的盆地volumes. To检查的净化性能所造成的甲醇的加入，启动期间广泛地遵循与在线硝酸盐传感器和每日复合样品。以甲醇和乙酸盐为碳源的污泥的反硝化能力的发展进行了跟踪，并在显微镜下检查了微生物的变化。在10 ℃下大约一个月后，获得了完全的反硝化。添加甲醇的污泥在相同时间后的反硝化能力达到了添加乙酸盐的污泥的反硝化能力。显微镜检查显示，一个不断增长的人口的萌芽和/或附属细菌，大概是丝微菌属，达到稳定的最大值时，最佳的硝酸盐去除发生。
In Sweden many advanced sewage treatment plants for BOD and phosphorus removal have to be extended with nitrogen removal. Due to existing plant configuration and wastewater composition, denitrification with supply of an external carbon source can be a cost-effective solution in many cases.At the Klagshamn wastewater treatment plant in Malmo investigations for extensive nitrogen removal have been made in a single-sludge system with pre-precipitation and post-denitrification where methanol was added for denitrification. Results from the tests showed that a high level of nitrogen removal can be reached, and that the process was stable and easy to operate. The process application gave less supplementary cost for an extended nitrogen removal than for upgrading the plant with larger basin volumes.In order to examine the purification performance caused by the addition of methanol, the starting period was followed extensively with online nitrate sensors and daily composite samples. The development of the denitrification capacity of the sludge with methanol and acetate as carbon sources was followed and microbiological changes were examined microscopically.Complete denitrification was obtained after approximately one month at 10-degrees-C. The denitrification capacity of the sludge with methanol reached that of acetate after about the same time. The microscopic examination revealed a growing population of budding and/or appendaged bacteria,presumably Hyphomicrobium spp, reaching a stable maximum at the time when optimal nitrate removal occurred.