Cultivation of Nannochloropsis sp. microalgae in palm oil mill effluent (POME) media for phycoremediation and biomass production: Effect of microalgae cells with and without beads
Cultivation of Nannochloropsis sp. microalgae in palm oil mill effluent (POME) media for phycoremediation and biomass production: Effect of microalgae cells with and without beads
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DOI：
10.1016/j.jwpe.2019.101043
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发表时间：
2020-02-01
影响因子：
7
通讯作者：
Harun, Razif
中科院分区：
文献类型：
--
作者：
Emparan, Quin;Jye, Yew Sing;Harun, Razif
微藻固定化是一种快速有效的藻修复方法，可用于污水处理和CO2生物封存。在本研究中，纳米绿藻的微藻细胞。在10%棕榈油厂废水（POME）培养基中，固定化海藻酸钠微球培养sp，用于废水处理和生物质生产。在处理过程中监测了固定化微藻条件下微藻细胞的生长和化学需氧量（COD）的还原速率，并与悬浮游离细胞进行了比较。结果表明，固定化微藻细胞的生物量浓度为1.27 g/L， COD降低率为71%，高于悬浮的自由细胞，生物量浓度为0.37 g/L， COD降低率为48%。固定化的微藻细胞在处理过程中表现出系统的生长，证明了海藻酸钠微球作为微藻固定化的生物相容性聚合物载体的适用性。海藻酸钠微球使POME培养基中的营养物质通过微球的膜孔运输，以支持微藻的生长。结果表明，海藻酸钠固定化纳米绿藻细胞是一种可持续、连续处理POME并同时生产生物质的可行技术。这将有助于开发新的和改进的POME治疗技术的研究工作。
Immobilization of microalgae presents a sustainable approach for rapid and effective phycoremediation such as wastewater treatment and CO2 biosequestration. In this study, microalgae cells of Nannochloropsis. sp immobilized on sodium alginate beads were cultivated in 10% Palm Oil Mill Effluent (POME) media for wastewater treatment and biomass production. The microalgae cells growth and the rate of Chemical Oxygen Demand (COD) reduction under immobilized microalgae conditions were monitored during the treatment process and compared to that of suspended free-cells. It was found that the immobilized microalgal cells demonstrated a higher biomass concentration of 1.27 g/L and COD reduction of 71% than the suspended free-cells which demonstrated a biomass concentration of 0.37 g/L and COD reduction of 48%. The immobilized microalgae cells showed a systematic growth during the treatment process, demonstrating the suitability of sodium alginate beads as a bio-compatible polymeric carrier for microalgal immobilization. The sodium alginate beads enabled the transport of nutrients from the POME medium through the membrane pores of the beads to support microalgae growth. The results indicated that the sodium alginate-immobilized Nannochloropsis sp. cells could be a viable technology for sustainable and continuous POME treatment with simultaneous biomass production. This will contribute to research efforts towards the development of new and improved technologies for POME treatment.