Razzak S A
Department of Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.
Interdisciplinary Research Center for Refining and Advanced Chemicals, King Fahd University of Petroleum & Minerals, Dhahran, Saudi Arabia.
Biotechnol Notes. 2024 Dec 14;6:32-43. doi: 10.1016/j.biotno.2024.12.002. eCollection 2025.
This study investigates the potential of phototrophic microalgae, specifically Chlorella protothecoides, for biological wastewater treatment, with a focus on the effects of air temperature and CO concentration on nutrient removal from tertiary municipal wastewater. Utilizing both the Monod and Arrhenius kinetic models, the research examines how temperature and nutrient availability influence microalgal growth and nutrient removal. The study finds that optimal biomass productivity occurs at 25 °C, with growth slowing at higher temperatures (30 °C, 40 °C, and 45 °C). The Monod and Arrhenius models, which showed strong agreement with experimental data, revealed that temperature significantly impacted growth kinetics, with the Arrhenius model accurately predicting growth rates at lower temperatures. Activation energies for growth and cell death were determined as 5.4 kJ mol⁻ and 88.4 kJ mol⁻, respectively. The study also demonstrated that optimal nitrogen and phosphorus removal occurred at 25°C-30 °C, with 100 % total nitrogen (TN) removal and 85 % total phosphorus (TP) removal achieved at 30 °C. Additionally, CO concentration influenced biomass productivity, with peak productivity and nutrient removal at 6 % CO, highlighting the importance of CO levels in optimizing growth and nutrient elimination. These findings provide valuable insights into optimizing conditions for microalgae-based wastewater treatment, particularly in seasonal cultivation strategies, and contribute to improving biodiesel production and nutrient removal efficiency.
本研究调查了光合微藻，特别是原壳小球藻用于生物废水处理的潜力，重点关注气温和一氧化碳浓度对城市三级废水营养物去除的影响。利用莫诺德和阿累尼乌斯动力学模型，该研究考察了温度和营养物可用性如何影响微藻生长和营养物去除。研究发现，最佳生物量生产力出现在25℃，在较高温度（30℃、40℃和45℃）下生长减缓。与实验数据高度吻合的莫诺德和阿累尼乌斯模型表明，温度对生长动力学有显著影响，阿累尼乌斯模型能准确预测较低温度下的生长速率。生长和细胞死亡的活化能分别确定为5.4 kJ mol⁻ 和88.4 kJ mol⁻。该研究还表明，最佳氮和磷去除发生在25℃至30℃，在30℃时实现了100%的总氮（TN）去除和85%的总磷（TP）去除。此外，一氧化碳浓度影响生物量生产力，在6%一氧化碳时生产力和营养物去除达到峰值，突出了一氧化碳水平在优化生长和营养物去除方面的重要性。这些发现为优化基于微藻的废水处理条件提供了宝贵见解，特别是在季节性养殖策略方面，并有助于提高生物柴油产量和营养物去除效率。
