Effects of depth, sediment and grazers on the degradation of drifting filamentous algae (Cladophora glomerata and Pilayella littoralis)

2004 ◽  
Vol 298 (1) ◽  
pp. 93-109 ◽  
Author(s):  
Sonja Salovius ◽  
Erik Bonsdorff
Keyword(s):  
Filamentous Algae ◽  
Cladophora Glomerata ◽  
Pilayella Littoralis

Effect of Simazine on Photosynthesis and Growth of Filamentous Algae

Weed Science ◽  
1983 ◽  
Vol 31 (6) ◽  
pp. 899-903 ◽  
Author(s):  
Steven W. O'Neal ◽  
Carole A. Lembi
Keyword(s):  
Light Intensity ◽  
Algal Species ◽  
Filamentous Algae ◽  
Cladophora Glomerata ◽  
Light Intensities ◽  
The Relationship ◽  
Algicidal Effects

Simazine [2-chloro-4,6-bis(ethylamino)-s-triazine] inhibited photosynthesis 50% at concentrations of 1.1 μM forSpirogyra jurgensii(Kutz), 3.0 μM forPithophora oedogonia(Mont.) Wittr., and 3.8 μM forCladophora glomerata(L.) Kutz. Photosynthesis ofAnkistrodesmus braunii(Brun.), a nonfilamentous species, was inhibited the same amount by 4.7 μM simazine. The filamentous algal species had significant reductions in growth but no other phytotoxic symptoms when exposed to 5 μM simazine at light intensities of 100 μE·m–2·s–1and below. Algicidal effects did occur at a light intensity of 400 μE·m–2·s–1and were most severe inSpirogyra.The relationship between light intensity and simazine toxicity indicates algicidal effectiveness on these filamentous algae will be limited in habitats where light is reduced by turbidity, depth, or self-shading.

Removal of nutrients from Organic Liquid Agricultural Waste using filamentous algae.

2020 ◽  
Author(s):  
Gonzalo Flores-Morales ◽  
Mónica Díaz ◽  
Patricia Arancibia-Avila ◽  
Michelle Muñoz-Carrasco ◽  
Pamela Jara-Zapata ◽  
...  
Keyword(s):  
Organic Waste ◽  
Low Cost ◽  
Organic Liquid ◽  
Agricultural Waste ◽  
Filamentous Algae ◽  
Tertiary Treatment ◽  
Nutrient Reduction ◽  
Algae Removal ◽  
Algae Growth ◽  
Waste Effluents

Abstract A feasibility analysis of tertiary treatment for Organic Liquid Agricultural Waste is presented using filamentous algae belonging to the genus Cladophora sp. as an alternative to chemical tertiary treatment. The main advantages of tertiary treatments that use biological systems are the low cost investment and the minimal dependence on environmental variables. In this work we demonstrate that filamentous algae reduces the nutrient load of nitrate (circa 75%) and phosphate (circa 86%) from the organic waste effluents coming from dairy farms after nine days of culture, with the added advantage being that after the treatment period, algae removal can be achieved by simple procedures. Currently, the organic wastewater is discarded into fields and local streams. However, the algae can acquire value as a by-product since it has various uses as compost, cellulose, and biogas. A disadvantage of this system is that clean water must be used to achieve enough water transparency to allow algae growth. Even so, the nutrient reduction system of the organic effluents proposed is friendly to the ecosystem, compared to tertiary treatments that use chemicals to precipitate and collect nutrients such as nitrates and phosphates.

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