通过传统的活性污泥,膜生物反应器和有氧颗粒污泥技术从工业废水中生产PHA和EPS:全面比较
Francesco Traina1, Marco Capodici1, Michele Torregrossa1
1Department of Engineering, University of Palermo, Viale delle Scienze, Ed. 8, 90128, Palermo, Italy.
Chemosphere
|March 27, 2024
概括
使用活性污泥膜生物反应器 (AS-MBR) 整合聚酸 (PHA) 生产与废水处理,可提供稳定的碳去除和高PHA产量. 这种方法非常适合工业应用,可同时进行废水净化和生物聚合物回收.
科学领域:
- 环境生物技术 环境生物技术
- 生物聚合物生产 生物聚合物生产
- 废水处理技术 废水处理技术
背景情况:
- 工业废水处理通常需要有效的有机碳去除.
- 聚酸酸盐 (PHAs) 是一种具有潜在应用的可生物降解聚合物.
- 将PHA生产整合到现有的废水处理中可以提高可持续性.
研究的目的:
- 评估聚酸 (PHA) 生产与工业废水处理的主流整合.
- 为了比较三种测序批量反应器 (SBR) 技术的性能:活性污泥 (AS-SBR),膜生物反应器 (AS-MBR) 和有氧颗粒污泥 (AGS).
- 评估不同的有机载荷率 (OLR) 对碳去除和PHA生产率的影响.
主要方法:
- 三个SBR系统 (AS-SBR,AS-MBR,AGS) 在完全有氧的盛宴/饥荒战略下运行.
- 系统受到不断增加的有机载荷率 (1,2,和3 kgCOD/m3·d).
- 监测了生物质与PHA储存细菌的丰富以及PHA生产率.
主要成果:
- 在所有OLR中,AS-MBR展示了优越和稳定的碳去除效率.
- 在AS-MBR中,PHA生产率与OLR相比增加 (最大35%w/w),但在AGS中下降 (最大14%w/w).
- AS-SBR显示PHA含量降低超过2kgCOD/m3·dOLR (最大20%w/w);AGS产生显著的细胞外聚合物质 (EPS) (最大75%w/w).
结论:
- 完全有氧的盛宴/饥荒策略适用于花污泥技术,如AS-SBR和AS-MBR用于PHA生产.
- 由于工艺稳定性和废水回收潜力,AS-MBR是将PHA生产整合到主流工业废水处理中最有前途的技术.
- AGS系统可能为回收其他生物聚合物 (如EPS) 提供了机会.
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