EPS solubilization treatment by applying the biosurfactant rhamnolipid to reduce clogging in constructed wetlands
| Autor: | Qiaohong Zhou, Du Mingpu, Xu Dong, Zhenbin Wu, Yi Zhang, Xuantung Trinh, Wu Junmei, Shuangyuan Liu, Wang Mei |
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| Rok vydání: | 2016 |
| Předmět: |
Environmental Engineering
Polymers Microorganism 0208 environmental biotechnology Bioengineering Wetland 02 engineering and technology 010501 environmental sciences Dispersion (geology) Waste Disposal Fluid 01 natural sciences Clogging chemistry.chemical_compound Extracellular polymeric substance Waste Management and Disposal Dissolution 0105 earth and related environmental sciences Pollutant geography geography.geographical_feature_category Renewable Energy Sustainability and the Environment Chemistry Environmental engineering Rhamnolipid food and beverages General Medicine Pulp and paper industry 020801 environmental engineering Solubility Wetlands Glycolipids |
| Zdroj: | Bioresource Technology. 218:833-841 |
| ISSN: | 0960-8524 |
| Popis: | Application of extracellular polymeric substances (EPS) solubilization treatment with biosurfactant rhamnolipid (RL) to reduce clogging in constructed wetlands was first conducted in this study. The results showed significant improvement in the solubilization and dispersion of clogging matter following the treatment. And RL dosage of 0.09-0.15g/L altered microbial group make-up and had an overall positive effect on the growth of microorganisms. Moreover, RL was found to enhance EPS dissolution and dispersion, which was beneficial for the release of enzymes embedded in the EPS, and resulted in enhanced pollutant removal. The treatment had no apparent detrimental effect on wetland plants. Our results indicate that the optimum dosage of RL is 0.12g/L, and that the approach provides a promising and moderate option to reverse wetland clogging through RL-mediated solubilization treatment. |
| Databáze: | OpenAIRE |
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