Evaluation of bioavailable dissolved organic nitrogen in municipal wastewater using green algae Chlamydomonas reinhardtii and Chlorella vulgaris

This paper deals with the accumulation of lipids, carbohydrates and proteins in the biomass of the green algae Chlorella vulgaris that is cultivated in the municipal wastewater of Vilnius City. The growth rate of the culture on different chemical compositions of media was investigated. Dependence of lipid, carbohydrate and protein content on total phosphorus and nitrogen initial concentrations in wastewater and removal of nutrients was investigated. Data showed that the higher amount of total nitrogen is the main factor leading to a higher rate of biomass increase. The study showed that Chlorella vulgaris is capable of very efficient nutrient removal from wastewater (up to 86% of total nitrogen and 87% phosphorus was removed). Data showed that there is strong correlation between the initial concentration of nitrogen, and in some cases phosphorus, in the media and content of proteins and carbohydrates in the biomass. A higher amount of nitrogen in the starting media leads to a higher amount of proteins and a lower amount of carbohydrate in the biomass. There was no correlation found between the initial nitrogen or phosphorus concentration in the media and content of lipids in the biomass.

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Algal Uptake of Hydrophobic and Hydrophilic Dissolved Organic Nitrogen in Effluent from Biological Nutrient Removal Municipal Wastewater Treatment Systems

Environmental Science & Technology ◽

10.1021/es203085y ◽

2011 ◽

Vol 46 (2) ◽

pp. 713-721 ◽

Cited By ~ 76

Author(s):

Haizhou Liu ◽

Joonseon Jeong ◽

Holly Gray ◽

Scott Smith ◽

David L. Sedlak

Keyword(s):

Wastewater Treatment ◽

Nutrient Removal ◽

Dissolved Organic Nitrogen ◽

Organic Nitrogen ◽

Municipal Wastewater ◽

Biological Nutrient Removal ◽

Municipal Wastewater Treatment ◽

Wastewater Treatment Systems

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Effect of some physical factors (Temperature, light intensity) on ability of algae (Scendesmus quadricauda , Chlorella vulgaris) to remove pollutants

Baghdad Science Journal ◽

10.21123/bsj.7.2.918-926 ◽

2010 ◽

Vol 7 (2) ◽

pp. 918-926

Author(s):

Baghdad Science Journal

Keyword(s):

Growth Rate ◽

Light Intensity ◽

Green Algae ◽

Chlorella Vulgaris ◽

Maximum Rate ◽

Doubling Time ◽

Municipal Wastewater ◽

Removal Rate ◽

Physical Factors ◽

Maximum Removal

The study included studying some of the optimum environmental conditions(temperature ,light intensity ) on the production of several green algae Scendesmus quadricauda and Chlorella vulgaris in a selected culture and municipal wastewater . The study also included the recording of growth rate ,doubling time and removal of phosphate and nitrate , maximum rate was recorded to the growth with minimum in doubling time and maximum removal rate of nitrogen-nitrate and phosor- phosphate in each selected culture and municipal wastewater in each species of green algae at 25 C? and a light intensity 380 µ E / m2 / s.

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