Harvesting of Rhodotorula glutinis via Polyaluminum Chloride or Cationic Polyacrylamide Using the Extended DLVO Theory
- 8 April 2021
- journal article
- research article
- Published by Springer Science and Business Media LLC in Applied Biochemistry and Biotechnology
- Vol. 193 (9), 2717-2728
- https://doi.org/10.1007/s12010-021-03549-1
Abstract
Polyaluminum chloride (PAC) and cationic polyacrylamide (CPAM) play a crucial role for separating microorganisms from bulk media. However, the mechanism of adsorption between cells and flocculants remain to be further defined to improve the flocculation efficiency (FE) in extreme conditions. This study conducted the flocculation process of Rhodotorula glutinis induced by PAC and CPAM, firstly. The result demonstrated that CPAM possessed more efficient harvesting ability for R. glutinis compared to PAC. The difference of flocculation capacity was then thermodynamically explained by the extended DLVO (eDLVO) theory; it turned out that the poor harvesting efficiency of PAC was attributed to lacking of binding sites as well as low adsorption force within particles. Based on this, the FE of PAC to R. glutinis was mechanically enhanced to 99.84% from 32.89% with 0.2 g/L CPAM modification at an optimum pH of 9. Also, the paper will play a guiding role in the treatment of inorganic salt ions and organic matters in wastewater.Keywords
Funding Information
- the national key Research and Development Program of China (2017YFB0306800)
- the 111 Project (B13005)
This publication has 26 references indexed in Scilit:
- Improved Carotenoid Productivity and COD Removal Efficiency by Co-culture of Rhodotorula glutinis and Chlorella vulgaris Using Starch Wastewaters as Raw MaterialApplied Biochemistry and Biotechnology, 2019
- Harvesting of the Microalga Nannochloropsis sp. by Bioflocculation with Mung Bean Protein ExtractApplied Biochemistry and Biotechnology, 2016
- Biosynthesis of silver nanoparticle and its application in cell wall disruption to release carbohydrate and lipid from C. vulgaris for biofuel productionBiotechnology Reports, 2016
- Microalgae flocculation: Impact of flocculant type, algae species and cell concentrationAlgal Research, 2013
- Rapid Aggregation of Biofuel-Producing Algae by the Bacterium Bacillus sp. Strain RP1137Applied and Environmental Microbiology, 2013
- Flocculation as a low-cost method for harvesting microalgae for bulk biomass productionTrends in Biotechnology, 2013
- Two-step in situ biodiesel production from microalgae with high free fatty acid contentBioresource Technology, 2013
- A review of the harvesting of micro-algae for biofuel productionReviews in Environmental Science and Bio/Technology, 2012
- Medium optimization for lipid production through co‐fermentation of glucose and xylose by the oleaginous yeast Lipomyces starkeyiEuropean Journal of Lipid Science and Technology, 2008
- Effective cell harvesting of the halotolerant microalga Dunaliella tertiolecta with pH controlJournal of Bioscience and Bioengineering, 2003