Nutrients removal from piggery wastewater coupled to lipid production by a newly isolated self-flocculating microalga Desmodesmus sp. PW1
| Autor: | Bilian Chen, Mingzi Wang, Qingqing Luo, Zhihong Chen, Meiqing Zheng, Mingmin Zheng, Shanshan Shao, Yongjin He |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Flocculation Environmental Engineering Nitrogen Linoleic acid Photobioreactor Bioengineering 010501 environmental sciences Wastewater 01 natural sciences chemistry.chemical_compound Extracellular polymeric substance 010608 biotechnology Microalgae Food science Biomass Waste Management and Disposal 0105 earth and related environmental sciences biology Renewable Energy Sustainability and the Environment Desmodesmus Phosphorus General Medicine Nutrients biology.organism_classification Oleic acid chemistry Sewage treatment |
| Zdroj: | Bioresource technology. 302 |
| ISSN: | 1873-2976 |
| Popis: | A newly isolated microalgal strain, Desmodesmus sp. PW1, possessing not only high potential for removing nitrogen and phosphorous from piggery wastewater but excellent self-flocculating ability, was provided here. Strain PW1 grew well in diluted and undiluted piggery wastewater, and could effectively remove total nitrogen and total phosphorus with removal rates up to 90% and 70%, respectively. In the laboratory scale by 30-L photobioreactor, microalga also performed well in TN (65.3%) and TP (83.5%) removal. Strain PW1 cultivated in the stationary phase achieved high self-flocculating efficiency (>90%) in 2.5 h of settling; meanwhile, temperature and pH slightly influenced on the flocculation. The potential mechanism on self-flocculation was considered related to hydrophobic extracellular polymeric substances. Furthermore, the fatty acid compositions of PW1 were mainly hexadecanoic acid, oleic acid and linoleic acid. Taken together, Desmodesmus sp. PW1 was the promising candidate to overcome the microalgae harvesting problem in piggery wastewater treatment. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect