Department of Environmental Science, Babasaheb Bhimrao Ambedkar University, Lucknow, India.
Int J Phytoremediation. 2022;24(8):831-841. doi: 10.1080/15226514.2021.1979463. Epub 2021 Nov 8.
The present study was conducted to assess the strain aptness, phycoremediation potential and lipid yield in microalgae and sp. Results revealed that microalgae treated with different concentration of wastewater (25%, 50%, 75% and 100%) recovered nutrients (Nitrogen: 50.55-85.90%, Phosphorus: 69.98-93.72%) and removed heavy metals (24.17-88.10%) from wastewater. Microalgae showed significant reduction in physico-chemical parameters of wastewater at 25% and 50% respectively with considerable increase in lipid production (1.61 folds) at 50% wastewater concentration. In order to counterbalance the wastewater induced toxicity, both microalgae exhibited stimulated antioxidants viz., proline (1.26-4.04 folds), ascorbic acid (1.01-9.21 folds), cysteine (1.44-4.92 folds), catalase (0.99-3.63 folds), superoxide dismutase (1.15-1.43 folds) and glutathione reductase (1.43-6.67 folds) at different wastewater concentrations. Further, Fourier transforms infrared spectroscopy spectral elucidation of at 50% reflected high lipid peak in the regions 3000-2800cm as compared to sp. Thus, growth characteristics, biochemical responses and lipid yield presented the suitability of the to be used in phycoremedation, resource recovery as well as lipid production, which may be further utilized as potent feedstock for third generation energy demand.
本研究旨在评估微藻和 sp. 的菌株适应性、光生物修复潜力和产油量。结果表明，微藻处理不同浓度的废水（25%、50%、75%和 100%）后，可回收营养物质（氮：50.55-85.90%，磷：69.98-93.72%）并去除废水中的重金属（24.17-88.10%）。微藻在 25%和 50%的废水浓度下，分别使废水的理化参数显著降低，同时在 50%的废水浓度下，产油量显著增加（1.61 倍）。为了抵消废水引起的毒性，两种微藻均表现出抗氧化剂脯氨酸（1.26-4.04 倍）、抗坏血酸（1.01-9.21 倍）、半胱氨酸（1.44-4.92 倍）、过氧化氢酶（0.99-3.63 倍）、超氧化物歧化酶（1.15-1.43 倍）和谷胱甘肽还原酶（1.43-6.67 倍）的刺激作用，其活性随废水浓度的变化而变化。进一步，50%废水浓度下的傅里叶变换红外光谱分析表明，与 sp. 相比，在 3000-2800cm 区域有较高的脂质峰。因此，生长特性、生化响应和产油量表明 适合用于光生物修复、资源回收以及产油，可进一步作为第三代能源需求的潜在原料加以利用。
