在低C/N废水中利用回收污泥衍生的生物炭增强除:可持续的解决方案
Yinglin Wang1, Luling Tian1, Jingjing Zheng1
1College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China.
Water research
|October 6, 2024
概括
在废水处理中添加污泥衍生生物炭显著增加了的去除,即使碳含量有限. 这种可持续的方法提高了城市废水处理厂 (WWTP) 的脱化效率和污泥回收.
科学领域:
- 环境科学 环境科学
- 环境工程 环境工程
- 微生物学 微生物学
背景情况:
- 对于废水处理厂 (WWTP) 来说,脱是至关重要的,但低碳/ (C/N) 比率阻碍了效率.
- 有机碳的有限可用性限制了城市废水中的微生物脱过程.
研究的目的:
- 研究污泥衍生生物炭对低C/N条件下的活性污泥中去除的影响.
- 评估生物炭作为污泥回收和改善废水处理的可持续解决方案的潜力.
主要方法:
- 基于污泥的生物炭的表征,重点关注物理化学性质和表面功能组.
- 批量测试以确定用于脱的最佳生物炭剂量.
- 测序批量反应器 (SBR) 实验,以评估生物炭对COD,NH4+-N和TN去除的影响.
- 代谢和电化学分析以了解生物炭对微生物活动和电子转移的影响.
主要成果:
- 在400°C准备的生物炭显示了电子转移的最佳特性.
- 4g/L生物炭的剂量显著提高了脱率和总 (TN) 清除效率.
- 使用生物炭的SBR实现了高的去除效率:COD的97.2 ± 1.2%,NH4+-N的99.2 ± 0.6%,TN的83.8 ± 2.4%.
- 生物炭添加增加了脱酶活性,功能基因丰度和电子转移系统活性 (ETSA) 60.1 ± 3.7%.
结论:
- 污泥衍生的生物炭有效地增强了低C/N比率的WWTP中的去除.
- 生物炭充当电子运送器,促进脱酶活性和微生物过程.
- 本研究提出了污泥回收利用和提高废水处理效率的可持续方法.
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