表面活性剂（十二烷基硫酸钠、曲通 X-100 和十六烷基三甲基溴化铵）对微藻生物质加压过滤脱水性能的影响。
The effects of surfactants (sodium dodecyl sulfate, triton X-100 and cetyl trimethyl ammonium bromide) on the dewaterability of microalgae biomass using pressure filtration.
机构信息
Institute of Engineering Research, Seoul National University, Seoul 08826, South Korea.
Department of Civil and Environmental Engineering, Seoul National University, Seoul 151-744, South Korea.
出版信息
Bioresour Technol. 2019 Feb;273:565-572. doi: 10.1016/j.biortech.2018.11.062. Epub 2018 Nov 16.
The application of pressure filtration in microalgae harvesting requires chemical pretreatment in order to reduce membrane fouling and to increase water flux. Surfactants have shown potential to enhance microalgae dewaterability by charge neutralization, bridging and releasing extracellular polymeric substances (EPS) and bound water. In this study, the effect of three surfactants including anionic sodium dodecyl sulfate (SDS), non-ionic triton X-100 and cationic cetyl trimethyl ammonium bromide (CTAB) on the dewaterability of Chlamydomonas sp. was investigated. Filtration fluxes and biomass concentrations were used to evaluate the microalgae dewaterability. Based on the results, SDS and Triton X-100 had a negative effect on the dewaterability of microalgae biomass. However, CTAB improved the dewaterability by decreasing the reversible and irreversible fouling resistance. The optimum dosage of CTAB was found to be 1500 mg/L, and resulted in 95.8% and 140% improvement on average water flux and biomass recovery efficiency, respectively.
压力过滤在微藻收获中的应用需要进行化学预处理，以减少膜污染并提高水通量。表面活性剂通过电荷中和、桥接和释放细胞外聚合物物质 (EPS) 和结合水，显示出提高微藻脱水性能的潜力。在这项研究中，研究了三种表面活性剂（阴离子十二烷基硫酸钠 (SDS)、非离子曲拉通 X-100 和阳离子十六烷基三甲基溴化铵 (CTAB)）对小球藻脱水性能的影响。过滤通量和生物质浓度用于评估微藻的脱水性能。结果表明，SDS 和曲拉通 X-100 对微藻生物质的脱水性能有负面影响。然而，CTAB 通过降低可逆和不可逆的堵塞阻力来改善脱水性能。发现 CTAB 的最佳剂量为 1500mg/L，平均水通量和生物质回收率分别提高了 95.8%和 140%。
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