Removal of nitrogen and phosphorus from thickening effluent of an urban wastewater treatment plant by an isolated green microalga
| Autor: | Michele Maglie, Costanza Baldisserotto, Lorenzo Ferroni, Francesco Avolio, Linda Benetti, Sara Demaria, Roberta Marchesini, Ornella Accoto, Marcello Zanella, Simonetta Pancaldi |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
0106 biological sciences
Nitrogen Biofertilizer Biomass Plant Science Photosynthetic pigment 010501 environmental sciences Photosynthesis Autochthonous microalgae Nitrogen Nutrient removal Phosphorus Urban wastewaters 01 natural sciences Article Urban wastewaters chemistry.chemical_compound 010608 biotechnology Nutrient removal Effluent Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences LS9_9 LS9_8 Ecology Botany food and beverages Ambientale Phosphorus Pulp and paper industry Phytoremediation Wastewater chemistry QK1-989 Sewage treatment Autochthonous microalgae |
| Zdroj: | Plants Plants, Vol 9, Iss 1802, p 1802 (2020) Volume 9 Issue 12 |
| Popis: | Microalgae are photosynthetic microorganisms and are considered excellent candidates for a wide range of biotechnological applications, including the removal of nutrients from urban wastewaters, which they can recover and convert into biomass. Microalgae-based systems can be integrated into conventional urban wastewater treatment plants (WW-TP) to improve the water depuration process. However, microalgal strain selection represents a crucial step for effective phytoremediation. In this work, a microalga isolated from the effluent derived from the thickening stage of waste sludge of an urban WW-TP was selected and tested to highlight its potential for nutrient removal. Ammonium and phosphate abatements by microalgae were evaluated using both the effluent and a synthetic medium in a comparative approach. Parallelly, the isolate was characterized in terms of growth capability, morphology, photosynthetic pigment content and photosystem II maximum quantum yield. The isolated microalga showed surprisingly high biomass yield and removal efficiency of both ammonium and phosphate ions from the effluent but not from the synthetic medium. This suggests its clear preference to grow in the effluent, linked to the overall characteristics of this matrix. Moreover, biomass from microalgae cultivated in wastewater was enriched in photosynthetic pigments, polyphosphates, proteins and starch, but not lipids, suggesting its possible use as a biofertilizer. |
| Databáze: | OpenAIRE |
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