Effects of temperature on biofilm formation and resource recovery during anoxyphototrophic treatment of fuel-synthesis wastewater

IF 2.4 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of chemical technology and biotechnology Pub Date : 2025-06-16 DOI:10.1002/jctb.7919

Sultan Shaikh, Soumia Gasmi, Adriaan Stephanus Luyt, Gordon McKay, Hamish Robert Mackey

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引用次数: 0

Abstract

BACKGROUND

Fuel-synthesis wastewater (FSW), a byproduct of the Fischer-Tropsch process, requiring efficient treatment and resource recovery strategies. This study aimed to optimize temperature conditions for purple non-sulfur bacteria (PNSB) biofilm formation and bioproduct recovery while simultaneously treating FSW. Experiments were conducted in biofilm photobioreactors operated at 30 °C, 35 °C, and 45 °C under illuminated anaerobic conditions. The study evaluated PNSB growth, wastewater treatment efficiency, and the yields of bioproducts, including polyhydroxybutyrate (PHB), single cell protein (SCP), lipids, carbohydrates and pigments.

RESULTS

No PNSB growth was observed at 45 °C, while the highest suspended growth occurred at 35 °C and biofilm growth at 30 °C. Biofilm formation significantly increased PHB accumulation (17%) compared to suspended growth (4.3%–7.4%), highlighting the efficiency of biofilm-based cultivation. Temperature had a minimal effect on PHB composition but influenced its crystallinity and morphology. The protein content remained consistent across conditions, while lipids increased with temperature.

CONCLUSION

Temperature selection between 30 °C and 35 °C significantly influences biofilm versus suspended biomass ratios and differentially affects bioproduct yields. Biofilm cultivation is preferable for maximizing PHB recovery, indicating potential for sustainable resource recovery and wastewater treatment strategies, particularly in tropical regions where external temperature regulation may be unnecessary. © 2025 The Author(s). Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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厌氧营养处理燃料合成废水过程中温度对生物膜形成和资源回收的影响

燃料合成废水（FSW）是费托工艺的副产品，需要有效的处理和资源回收策略。本研究旨在优化紫色非硫细菌（PNSB）生物膜形成和生物产物回收的温度条件，同时处理垃圾。实验在30°C、35°C和45°C光照厌氧条件下的生物膜光生物反应器中进行。该研究评估了PNSB的生长、废水处理效率以及生物制品的产量，包括聚羟基丁酸盐（PHB）、单细胞蛋白（SCP）、脂类、碳水化合物和色素。结果在45°C条件下，PNSB未生长，35°C条件下悬浮生长最高，30°C条件下生物膜生长最高。与悬浮生长（4.3%-7.4%）相比，生物膜的形成显著增加了PHB积累（17%），突出了生物膜培养的效率。温度对PHB的组成影响很小，但对其结晶度和形貌有影响。蛋白质含量在不同条件下保持一致，而脂质随温度升高而增加。结论30 ~ 35℃的温度选择显著影响生物膜与悬浮生物量的比例，并对生物产品产量产生差异。生物膜培养更有利于PHB的最大化回收，这表明可持续资源回收和废水处理策略的潜力，特别是在热带地区，外部温度调节可能是不必要的。©2025作者。由John Wiley &； Sons Ltd代表美国化学工业学会（SCI）出版的化学技术与生物技术杂志。

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来源期刊

Journal of chemical technology and biotechnology 工程技术-工程：化工

CiteScore

7.00

自引率

5.90%

发文量

268

审稿时长

1.7 months

期刊介绍： Journal of Chemical Technology and Biotechnology(JCTB) is an international, inter-disciplinary peer-reviewed journal concerned with the application of scientific discoveries and advancements in chemical and biological technology that aim towards economically and environmentally sustainable industrial processes.