Kinetic study of nutrients removal from municipal wastewater by Chlorella vulgaris in photobioreactor supplied with CO2-enriched air
| Autor: | Anil Kumar Dikshit, Yen Wah Tong, Ramjee Chaudhary |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Bubble column
0208 environmental biotechnology Chlorella vulgaris Photobioreactor 02 engineering and technology General Medicine 010501 environmental sciences Pulp and paper industry 01 natural sciences 020801 environmental engineering Environmental biotechnology Nutrient Wastewater Environmental Chemistry Environmental science Waste Management and Disposal 0105 earth and related environmental sciences Water Science and Technology |
| DOI: | 10.6084/m9.figshare.7229369.v2 |
| Popis: | The microalgae Chlorella vulgaris ATCC 13482 was used in the present study for municipal wastewater treatment. Batch experiments were performed in bubble column photobioreactors of 7 L working volume maintained at 25 ± 2°C and 14 h/10 h of photo and dark cycle. The treatment process was enhanced by using CO2-augmented air (5% CO2 v/v) supply into the microalgal culture in comparison to the use of normal air (0.03% CO2 v/v). For a period of 7 days, C. vulgaris effected maximum removals of 74.4% soluble fraction of chemical oxygen demand, 72% ammonia (NH4–N), 60% nitrate (NO3–N) and 81.93% orthophosphate (PO4–P) with use of normal air, whereas 84.6% sCOD, 88% NH4–N, 72% NO3–N and 92.8% PO4–P removals, respectively, with use of 5% CO2/air supply. Using kinetic study data, the specific rates of ammonia and phosphate uptake (qammonia and qphosphate) by C. vulgaris at 5% CO2/air supply were found to be 2.41 and 0.85 d−1, respectively. Using the algal remediation technology, nitrogen–phosphorus–potassium recovery from sewage treatment plant of 37.5 million litres per day wastewater influent capacity was calculated to be ∼298.5, 55.4 and 83.7 kg d−1, respectively. |
| Databáze: | OpenAIRE |
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