Optimal strategies for bioremediation of nitrate-contaminated groundwater and microalgae biomass production
| Autor: | Mohammad-Hossein Sarrafzadeh, Hee-Mock Oh, Fariba Rezvani, Seong-Hyun Seo |
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| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Nitrogen Health Toxicology and Mutagenesis Chlorella vulgaris Chlorella 010501 environmental sciences 01 natural sciences Phosphates chemistry.chemical_compound Nutrient Bioremediation Nitrate 010608 biotechnology Microalgae Environmental Chemistry Ecotoxicology Biomass Groundwater 0105 earth and related environmental sciences Ettlia Nitrates biology Chlamydomonas Phosphorus General Medicine biology.organism_classification Pulp and paper industry Pollution Biodegradation Environmental chemistry Environmental science Contaminated groundwater Water Pollutants Chemical |
| Zdroj: | Environmental science and pollution research international. 25(27) |
| ISSN: | 1614-7499 |
| Popis: | Optimizing the mono-cultivation and mixed cultivation of Chlamydomonas reinhardtii, Chlorella vulgaris, and an Ettlia sp. was evaluated for treating nitrate-contaminated groundwater and biomass production. Ettlia sp. showed the highest nutrient assimilation and growth rate among the three microalgae during bioremediation. Light-dark cycle was the effective condition for nutrient removal and COD mitigation by microalgae. Mixed microalgae with a larger presence of the Ettlia sp. exhibited the highest biomass productivity, nitrate-nitrogen, and phosphate-phosphorus removal rates of 0.21 g/L/d, 16.6, and 3.06 mg/L/d, respectively. An N:P mass ratio of 5 was necessary to increase the mixed-microalgal performance. The settling efficiency of the mixed microalgae increased up to 0.55 when using pH modulation during 30 min. Therefore, applying an Ettlia sp.-dominant consortium was the optimum strategy for the bioremediation of nitrate-contaminated groundwater in 3 days. |
| Databáze: | OpenAIRE |
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