苏黎世-格拉特污水处理厂连接后苏黎世-韦尔德赫茨利污水处理厂氮去除效果的改善。

Improvement of nitrogen removal at WWTP Zürich Werdhöelzli after connection of WWTP Zürich-Glatt.

作者信息

Siegrist H, Rieger L, Fux Ch, Wehrli M

机构信息

EAWAG, CH-8600 Dübendorf, Switzerland.

出版信息

Water Sci Technol. 2004;50(7):35-43.

PMID:15553456

Abstract

Optimisation of nitrifying activated sludge plants towards nutrient removal (denitrification and enhanced P-removal) leads to a substantial reduction of operating costs and improves effluent and operating conditions. At WWTP Zürich-Werdhöelzli, initially designed for nitrification only, an anoxic zone of 28% of total activated sludge volume was installed and allowed 60% nitrogen elimination besides several other optimisations. In 2001 the operation of WWTP Zürich-Glatt was stopped and the wastewater was connected to WWTP Werdhöelzli. To improve nitrogen removal, WWTP Werdhöelzli co-financed two research projects; one for separate digester supernatant treatment with the anammox process operating two SBRs in series and the other applying NH4 sensors for aeration control in order to decrease energy consumption and raise effluent quality. The results of both projects and the consequences for WWTP Werdhöelzli are discussed in this paper.

摘要

将硝化活性污泥厂优化以实现营养物去除（反硝化和强化除磷）可大幅降低运营成本，并改善出水和运行条件。在最初仅设计用于硝化的苏黎世 - 韦尔德赫茨利污水处理厂，设置了占总活性污泥体积28%的缺氧区，除其他多项优化措施外，还实现了60%的氮去除率。2001年，苏黎世 - 格拉特污水处理厂停止运行，其废水接入了韦尔德赫茨利污水处理厂。为提高氮去除率，韦尔德赫茨利污水处理厂共同资助了两个研究项目；一个是采用厌氧氨氧化工艺对消化池上清液进行单独处理，串联运行两个序批式反应器；另一个是应用铵传感器进行曝气控制，以降低能耗并提高出水水质。本文讨论了这两个项目的结果以及对韦尔德赫茨利污水处理厂的影响。