Laboratory of Protistology and Aquatic Ecology, Department of Biology, Ghent University, Krijgslaan 281-S8, 9000 Gent, Belgium.
Laboratory of Protistology and Aquatic Ecology, Department of Biology, Ghent University, Krijgslaan 281-S8, 9000 Gent, Belgium.
Bioresour Technol. 2015 Mar;179:234-242. doi: 10.1016/j.biortech.2014.12.028. Epub 2014 Dec 16.
The N/P ratio of wastewater can vary greatly and directly affect algal growth and nutrient removal process. Three benthic filamentous algae species Cladophora sp., Klebsormidium sp. and Pseudanabaena sp. were isolated from a periphyton bioreactor and cultured under laboratory conditions on varying N/P ratios to determine their ability to remove nitrate and phosphorus. The N/P ratio significantly influenced the algal growth and phosphorus uptake process. Appropriate N/P ratios for nitrogen and phosphorus removal were 5-15, 7-10 and 7-20 for Cladophora sp., Klebsormidium sp. and Pseudanabaena sp., respectively. Within these respective ranges, Cladophora sp. had the highest biomass production, while Pseudanabaena sp. had the highest nitrogen and phosphorus contents. This study indicated that Cladophora sp. had a high capacity of removing phosphorus from wastewaters of low N/P ratio, and Pseudanabaena sp. was highly suitable for removing nitrogen from wastewaters with high N/P ratio.
污水中的 N/P 比值变化较大，会直接影响藻类的生长和营养去除过程。从附着生物反应器中分离出三种底栖丝状藻类，即 Cladophora sp.、Klebsormidium sp. 和 Pseudanabaena sp.，并在实验室条件下在不同的 N/P 比值下培养，以确定它们去除硝酸盐和磷的能力。N/P 比值显著影响藻类的生长和磷吸收过程。Cladophora sp.、Klebsormidium sp. 和 Pseudanabaena sp. 分别适合用于氮磷去除的 N/P 比值为 5-15、7-10 和 7-20。在这些相应的范围内，Cladophora sp. 的生物量产量最高，而 Pseudanabaena sp. 的氮和磷含量最高。本研究表明，Cladophora sp. 具有从低 N/P 比值废水中去除磷的高能力，而 Pseudanabaena sp. 非常适合从高 N/P 比值废水中去除氮。
