通过使用无氧动态养工艺通过乳酸促进产生聚酸酸盐的颗粒性污泥的形成
Jiaxing Xi1, Wenjie Fang2, Huihui Zhang3
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Chongqing Key Laboratory of Agricultural Resources and Environment, College of Resources and Environment, Southwest University, Chongqing 400715, China.
Journal of biotechnology
|September 20, 2024
概括
无氧动态养 (AnDF) 过程有效地促进颗粒型污泥的形成,并增强聚酸酸盐 (PHAs) 的产生. 添加乳酸显著提高了污泥颗粒和PHA合成能力.
科学领域:
- 环境生物技术环境生物技术
- 微生物生态学 微生物生态学
- 生物聚合物生产生产
背景情况:
- 颗粒式污泥在废水处理和生物聚合物合成方面具有优势.
- 优化污泥颗粒化是提高聚酸酸盐 (PHAs) 生产的关键.
- 现有的方法需要改进,以有效地形成产生PHA的颗粒性污泥 (PHAGS).
研究的目的:
- 调查无氧动态养 (AnDF) 过程,以促进颗粒性污泥的形成.
- 评估乳酸 (LA) 含量对污泥颗粒和PHA合成的影响.
- 定义识别PHAGS的标准.
主要方法:
- 使用了三台AnDF反应堆,其乳酸 (LA) 度不同 (0%,20%,40%COD).
- 在50天内监测了污泥颗粒度,颗粒大小和PHA含量.
- 根据颗粒大小和PHA含量来表征PHAGS.
主要成果:
- 使用LA的AnDF工艺显著增强了污泥颗粒和PHA合成能力.
- 颗粒在反应堆中以40%的LA迅速 (50天) 形成,直径达到0.69毫米.
- 在40%的LA反应堆中,最大PHA含量达到了47.0重量%,与对照组相比增加了30.09%.
- 产生细胞外聚合物物质 (EPS) 的细菌被确定为PHAGS形成的潜在驱动因素.
结论:
- AnDF工艺有效地促进了具有高PHA合成能力的颗粒性污泥的形成.
- 乳酸添加对于增强污泥颗粒和PHA生产至关重要.
- 该研究将PHAGS定义为颗粒型污泥,尺寸>0.30毫米,PHA含量>40% (CDW).
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