Norström A, Larsdotter K, Gumaelius L, la Cour Jansen J, Dalhammar G
Environmental Microbiology, Royal Institute of Technology, 106 91 Stockholm, Sweden.
Water Sci Technol. 2003;48(11-12):161-7.
A treatment plant using conventional biological treatment combined with hydroponics and microalgae is constructed in a greenhouse in the area of Stockholm, Sweden. The treatment plant is built for research purposes and presently treats 0.559 m3 of domestic wastewater from the surrounding area per day. The system uses anoxic pre-denitrification followed by aerobic tanks for nitrification and plant growth. A microalgal step further reduces phosphorus, and a final sand filter polishes the water. During a three week period in July 2002 the treatment capacity of this system was evaluated with respect to removal of organic matter, phosphorus and nitrogen. 90% COD removal was obtained early in the system. Nitrification and denitrification was well established with total nitrogen reduction of 72%. Phosphorus was removed by 47% in the process. However, higher phosphorus removal values are expected as the microalgal step will be further developed. The results show that acceptable treatment can be achieved using this kind of system. Further optimisation of the system will lead to clean water as well as valuable plants to be harvested from the nutrient rich wastewater.
瑞典斯德哥尔摩地区的一个温室中建造了一座采用传统生物处理与水培和微藻相结合的处理厂。该处理厂是为研究目的而建，目前每天处理来自周边地区的0.559立方米生活污水。该系统采用缺氧预脱硝，随后是用于硝化和植物生长的好氧池。微藻步骤进一步降低磷含量，最后通过砂滤对水进行净化。在2002年7月的三周时间里，对该系统去除有机物、磷和氮的处理能力进行了评估。在系统早期实现了90%的化学需氧量去除率。硝化和反硝化效果良好，总氮减少了72%。该过程中磷的去除率为47%。然而，随着微藻步骤的进一步发展，预计磷的去除值会更高。结果表明，使用这种系统可以实现可接受的处理效果。系统的进一步优化将产生清洁的水以及可从富含营养的废水中收获的有价值的植物。
