通过化驱动的酸性浸出和化驱动的性沉来有效地从消化的污泥和超物中去除金属
Chenkai Niu1, Tao Liu2, Zheng Kong1
1Australian Centre for Water and Environmental Biotechnology (ACWEB, formerly AWMC), The University of Queensland, St. Lucia, Queensland 4072, Australia.
Water research
|October 7, 2025
概括
本研究介绍了一种两步生物工艺,用于从污泥中去除重金属. 它使用化和脱过程中的pH值变化来回收金属和去除,提供可持续的污泥管理解决方案.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 废水污泥中的重金属污染给环境和处置带来了重大挑战.
- 有效的污泥管理策略对于减轻与重金属转移相关的风险至关重要.
- 目前从污泥中去除重金属的方法通常涉及苛刻的化学品或能源密集型工艺.
研究的目的:
- 开发和评估一种新的两步生物过程,用于同时从消化的污泥和超浮物中去除重金属和.
- 用膜生物膜反应器研究pH驱动的生物溶解和随后的金属沉的有效性.
- 探索微生物群落和挥发性脂肪酸在处理过程中的作用.
主要方法:
- 采用了两阶段的生物工艺:第一阶段涉及耐酸氨氧化细菌 (AOB),用于污泥酸化和金属溶解.
- 第二阶段使用/二氧化碳 (H2/CO2) 基膜生物膜反应器 (MBfR) 进行脱,去和金属沉.
- 进行了微生物社区分析和现场批量测试,以确定关键的微生物和电子捐赠者.
主要成果:
- 第一个阶段在pH值~2.3时,为Cu (84.1%),Zn (94.5%),Mg (83.9%) 和Al (72.3%) 实现了高溶解效率.
- 第二阶段证明了超过90%的去除和超过90%的Cu,Zn和Al沉在pH>7.7时.
- 挥发性脂肪酸 (VFA) 被确定为二次电子捐赠者,与一起,支持生物过程.
结论:
- 拟议的两步生物处理有效地从污泥和超物中去除重金属,而不需要外部酸或.
- 这种方法为污泥管理和资源回收提供了一种可持续和综合的方法.
- 这些发现支持微生物过程在解决复杂的环境污染问题方面的潜力.
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