Use of Chlorella vulgaris microalgae in the treatment of dairy wastewater
Background and Objective: Nutrient-rich effluents (mainly nitrogen and phosphorus) may lead to algae blooms and many harmful effects in aquatic environments. Micro-algae have been more effective among the various methods used for the removing of nutrients from wastewater. Microalgae Chlorella vulgar...
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| Format: | Article |
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Tehran University of Medical Sciences
2019-09-01
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| Series: | سلامت و محیط |
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| Online Access: | http://ijhe.tums.ac.ir/article-1-6198-en.html |
| _version_ | 1819097323339251712 |
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| author | M Khalaji SA Hiseini R Ghorbani N Agh H Rezayi |
| author_facet | M Khalaji SA Hiseini R Ghorbani N Agh H Rezayi |
| author_sort | M Khalaji |
| collection | DOAJ |
| description | Background and Objective: Nutrient-rich effluents (mainly nitrogen and phosphorus) may lead to algae blooms and many harmful effects in aquatic environments. Micro-algae have been more effective among the various methods used for the removing of nutrients from wastewater. Microalgae Chlorella vulgaris has specific characteristics such as rapid growth, resistant to systems manipulation, simple and inexpensive production technology, as well as the rapid uptake of nutrients such as phosphate and nitrate.
Materials and Methods: In the present study, two concentrations of chlorella vulgaris microalgae (13 and 26 million cells/mL) were injected into dairy effluent, diluted using distilled water by 25, 50 and 75%, and the amount of nutrient removal and microalgae growth were examined during the growth period.
Results: Results indicated that different concentrations of algae at various percentages of dilution (25, 50, 75%) had a significant effect on the removal of nutrients and algal growth (p<0.05). The absorption of nutrients (nitrate, phosphate and ammonia) were 57.01, 51.84 and 43.15 percent respectively that containing lower density of initial algae compared to the treatments of 2nd group (29.15, 51.84 and 43.15 percent) with higher algae concentration. In both algal concentrations, the highest percentage of phosphate and ammonia adsorption were in dilution of 25% effluent and the highest percentage of nitrate adsorption were in the first group with 50% dilution and in the second group with 75% dilution.
Conclusion: The more percentage of nutrients (nitrate, phosphate, ammonia) was eliminated compared to the second group (26 million cells / mL) when the microalgae concentration (group I) was 13 million cells / mL. Absorption of nutrients was decreased by increasing the concentration of microalgae. Regarding to the percentage of nitrate adsorption, the higher absorbance in the dilution was occurred at the highest concentration of algae. |
| first_indexed | 2024-12-22T00:13:16Z |
| format | Article |
| id | doaj.art-76788fa0b98245269a1003a72bce2e84 |
| institution | Directory Open Access Journal |
| issn | 2008-2029 2008-3718 |
| language | fas |
| last_indexed | 2024-12-22T00:13:16Z |
| publishDate | 2019-09-01 |
| publisher | Tehran University of Medical Sciences |
| record_format | Article |
| series | سلامت و محیط |
| spelling | doaj.art-76788fa0b98245269a1003a72bce2e842022-12-21T18:45:23ZfasTehran University of Medical Sciencesسلامت و محیط2008-20292008-37182019-09-01122307318Use of Chlorella vulgaris microalgae in the treatment of dairy wastewaterM Khalaji0SA Hiseini1R Ghorbani2N Agh3H Rezayi4 Department of Aquatic Production and Exploitation, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Recourses, Gorgan, Iran Department of Aquatic Production and Exploitation, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Recourses, Gorgan, Iran Department of Aquatic Production and Exploitation, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Recourses, Gorgan, Iran Artemia and Aquaculture Research Institute, Department of Biology and Reproduction, Faculty of Fisheries, Urumieh University, Urumieh, Iran Department of Environment, Faculty of Fisheries and Environment, Gorgan University of Agricultural Sciences and Natural Recourses, Gorgan, Iran Background and Objective: Nutrient-rich effluents (mainly nitrogen and phosphorus) may lead to algae blooms and many harmful effects in aquatic environments. Micro-algae have been more effective among the various methods used for the removing of nutrients from wastewater. Microalgae Chlorella vulgaris has specific characteristics such as rapid growth, resistant to systems manipulation, simple and inexpensive production technology, as well as the rapid uptake of nutrients such as phosphate and nitrate. Materials and Methods: In the present study, two concentrations of chlorella vulgaris microalgae (13 and 26 million cells/mL) were injected into dairy effluent, diluted using distilled water by 25, 50 and 75%, and the amount of nutrient removal and microalgae growth were examined during the growth period. Results: Results indicated that different concentrations of algae at various percentages of dilution (25, 50, 75%) had a significant effect on the removal of nutrients and algal growth (p<0.05). The absorption of nutrients (nitrate, phosphate and ammonia) were 57.01, 51.84 and 43.15 percent respectively that containing lower density of initial algae compared to the treatments of 2nd group (29.15, 51.84 and 43.15 percent) with higher algae concentration. In both algal concentrations, the highest percentage of phosphate and ammonia adsorption were in dilution of 25% effluent and the highest percentage of nitrate adsorption were in the first group with 50% dilution and in the second group with 75% dilution. Conclusion: The more percentage of nutrients (nitrate, phosphate, ammonia) was eliminated compared to the second group (26 million cells / mL) when the microalgae concentration (group I) was 13 million cells / mL. Absorption of nutrients was decreased by increasing the concentration of microalgae. Regarding to the percentage of nitrate adsorption, the higher absorbance in the dilution was occurred at the highest concentration of algae.http://ijhe.tums.ac.ir/article-1-6198-en.htmlmicroalgae chlorella vulgariseffluentdairy industrynutrientsbiodegradation |
| spellingShingle | M Khalaji SA Hiseini R Ghorbani N Agh H Rezayi Use of Chlorella vulgaris microalgae in the treatment of dairy wastewater سلامت و محیط microalgae chlorella vulgaris effluent dairy industry nutrients biodegradation |
| title | Use of Chlorella vulgaris microalgae in the treatment of dairy wastewater |
| title_full | Use of Chlorella vulgaris microalgae in the treatment of dairy wastewater |
| title_fullStr | Use of Chlorella vulgaris microalgae in the treatment of dairy wastewater |
| title_full_unstemmed | Use of Chlorella vulgaris microalgae in the treatment of dairy wastewater |
| title_short | Use of Chlorella vulgaris microalgae in the treatment of dairy wastewater |
| title_sort | use of chlorella vulgaris microalgae in the treatment of dairy wastewater |
| topic | microalgae chlorella vulgaris effluent dairy industry nutrients biodegradation |
| url | http://ijhe.tums.ac.ir/article-1-6198-en.html |
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