磁铁提升污泥无氧发酵以改善废水的生物去除:试点规模验证
Binbin Jiang1, Donghui Lu2, Xiaojia Shen3
1College of Environmental & Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
Chemosphere
|June 14, 2023
概括
磁石增强废物污泥的性无氧发酵,产生短链脂肪酸 (SCFA). 这通过促进有益的微生物群落和酶活性来改善城市废水处理中的去除.
科学领域:
- 环境工程 环境工程
- 生物技术是生物技术.
- 废水处理 废水处理
背景情况:
- 废弃活性污泥对处置来说是一个挑战.
- 性无氧发酵通过产生短链脂肪酸 (SCFA) 来恢复资源.
- 添加磁铁可能会提高发酵液质量.
研究的目的:
- 研究用于SCFA生产的污泥的用磁铁增强的性无氧发酵.
- 评估使用富含SCFA的发酵液作为城市污水中生物去除的外部碳来源.
- 分析磁石对微生物群落和在去除过程中的酶活性的影响.
主要方法:
- 试点规模的废弃活性污泥的性无氧发酵,添加磁铁.
- 在发酵液中SCFA生产的特征.
- 发酵液在主流的A2O过程中用于去除的应用.
- 微生物社区分析和酶活性测定.
主要成果:
- 磁铁石显著增加了SCFA的产量,达到平均3718.6±101.5毫克COD/L,酸达到2368.8±132.1毫克COD/L.
- 使用富含SCFA的发酵液,A2O过程中的总 (TN) 去除效率从48.0%±5.4%提高到62.2%±6.6%.
- 磁铁促进了有利于脱的微生物群落的继承,并增强了相关酶的活性.
结论:
- 用磁铁增强的污泥无氧发酵是一种有效的SCFA生产方法.
- 生产的SCFA作为一种有价值的外部碳来源,可显著改善城市废水中的生物去除.
- 该过程在经济和技术上是可行的,以提高废水处理效率.
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