caa a22 4500 475784103 CHVBK 20180406123653.0 cr unu---uuuuu 170329e20000301xx s 000 0 eng 10.1023/A:1008168128654 doi (NATIONALLICENCE)springer-10.1023/A:1008168128654 Nitrogen and phosphorus removal by high latitude mat-forming cyanobacteria for potential use in tertiary wastewater treatment [Elektronische Daten] [P. Chevalier, D. Proulx, P. Lessard, W.F. Vincent, J. de la Noüe] As part of a program to develop biological wastewatertreatment systems for cold climate areas four strainsof filamentous, mat-forming cyanobacteria isolatedfrom Arctic and Antarctic environments were evaluatedfor their nutrient stripping and growth capabilities. A tropical strain, Phormidium bohneri, known forits excellent performance in wastewater treatment, wasused as a comparison. Experiments were done inartificial media under controlled batch cultureconditions to avoid interactions with indigenousmicroorganisms such as bacteria and protozoa. Theculture medium simulated real effluents containinghigh concentrations of nitrate and phosphate.Temperatures (5, 15 and 25°C) and irradiances(80, 210, 350, 640 and 1470 µmol photon m-2s-1) wereselected according to situations encountered in avariety of field conditions. For all irradiancelevels, growth was satisfactory at 15 and 25 °C,but limited at 5 °C. At 25 °C a satisfactory nitrogen removal rate (3.5and 4.0 mg N L-1d-1) was obtained forone polar strain (Phormidium tenue) and thecontrol P. bohneri. At 15 °C, the bestnitrogen removal rate (3.5 mg N L-1d-1)was measured with P. bohneri while the best ratefor the polar strains was around 2.3 mg NL-1d-1. At 15 °C, a phosphorusremoval rate of 0.6 mg P L-1d-1 wasobtained with P. bohneri and polar strains P. tenue and Oscillatoria O-210. Nitrogen(NO3 -) and phosphorus (PO4 3-)uptake rates increased as a function of irradianceover the range 80 to 350 μmolphoton m-2s-1. Our results indicate thattertiary biological wastewater treatment at lowtemperatures (5 °C) cannot be anticipated withthe polar strains tested, because they arepsychrotrophic rather than psychrophilic and thus growtoo slowly under conditions of extreme cold. However, it appears that these cyanobacteria would beuseful for wastewater treatment at moderately cooltemperatures (c. 15 °C), which are commonduring spring and fall in northern climates. Kluwer Academic Publishers, 2000 Antarctica nationallicence Arctic nationallicence cyanobacteria nationallicence nutrients nationallicence Oscillatoria nationallicence Phormidium subfuscum nationallicence Phormidium bohneri nationallicence Schizothrix calcicola nationallicence tertiary treatment nationallicence wastewater nationallicence Chevalier P. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut Proulx D. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut Lessard P. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut Vincent W.F. Département de biologie, Université Laval, G1K 7P4, Sainte-Foy, Québec, Canada aut de la Noüe J. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut Journal of Applied Phycology Kluwer Academic Publishers 12/2(2000-03-01), 105-112 0921-8971 12:2<105 2000 12 10811 https://doi.org/10.1023/A:1008168128654 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008168128654 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chevalier P. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut NATIONALLICENCE 700 1- Proulx D. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut NATIONALLICENCE 700 1- Lessard P. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut NATIONALLICENCE 700 1- Vincent W.F. Département de biologie, Université Laval, G1K 7P4, Sainte-Foy, Québec, Canada aut NATIONALLICENCE 700 1- de la Noüe J. Groupe de Recherche en Recyclage Biologique et Aquiculture(GREREBA), Canada aut NATIONALLICENCE 773 0- Journal of Applied Phycology Kluwer Academic Publishers 12/2(2000-03-01), 105-112 0921-8971 12:2<105 2000 12 10811 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer