Formulation of Green Bioactivator Based on Natural Products for Remediation of Polluted Waters
2021
Xu, Qiang | Xing, Hui | He, Chunling | Huang, Guangtuan
Bioactivator is a kind of agent rich in nutrients and a variety of active substances, which is considered as one of the green methods to deal with the pollution of natural waters because of its high efficiency, low cost, environment-friendly, and causing no secondary pollution. In this study, a green bioactivator formulation composed of fulvic acid, seaweed extract, and molasses (fulvic acid 1.744 mg/L: seaweed extract 1.756 mg/L: molasses 0.5 mg/L) was obtained by mixture design experiments, which can improve the removal rates of COD and NH₃-N by 15–25% and 7–15%, respectively, compared with untreated water. The effects of adding various carbon sources, trace elements, and growth factors on the basis of the developed formulation were explored to optimize the developed formulation and improve the effect of water remediation; the experiment results showed that sodium acetate and glucose as carbon sources were beneficial to the removal of NH₃-N; Mn, Mo, and B as trace elements can further increase the COD removal rates by 5.0–8.2%; niacin and vitamin B12 (VB12) as growth factors can increase COD removal rate by 7.5% and 4.7%, respectively. This study provides a green biological activator with good application prospect, which can be applied to the remediation of polluted water.
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