以元素硫为驱动的自无化工艺,有效地去除水产养殖废水中的酸盐:性能,动力学和微生物群落
Chemosphere
|July 2, 2023
概括
以元素硫为驱动的自脱 (SDAD) 有效地从碳缺乏的农业废水中去除酸盐. 这项研究优化了SDAD的性能,并确定了Sulfurimonas作为控制沿海肥胖的主要细菌.
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:
- 由于酸盐含量高和有机碳含量低,鱼类养殖废水带来了挑战.
- 以元素硫为驱动的自脱 (SDAD) 是在这种环境中去除酸盐的潜在解决方案.
- 缺乏对水产养殖废水的SDAD进行系统研究.
研究的目的:
- 研究SDAD生物膜工艺的操作性能,动力特征和微生物群体.
- 通过使用SDAD,评估从水产养殖废水中去除酸盐 (NO3--N) 的效率.
- 确定影响SDAD表现和微生物社区结构的因素.
主要方法:
- 建立了一个装载式反应堆,并连续运行了230天.
- 研究了液压保留时间 (HRT),影响NO3--N度,溶解氧 (DO) 和温度对NO3--N去除的影响.
- 使用分子技术分析了运动模型,副产品形成 (亚酸盐,氨酸盐,硫酸盐) 和微生物社区组成.
主要成果:
- 实现了从51.4%到98.6%的NO3 - - N去除效率和从0.054到0.546gL-1d-1.1的去除率.
- 操作条件显著影响了去除效率,动力学 (半级到零级) 和副产品形成.
- 硫胺被确定为占主导地位的属和主要的功能细菌,随着时间的推移,微生物多样性下降.
结论:
- SDAD是一种有前途的技术,可以从水产养殖废水中去除酸盐,减轻沿海肥胖.
- 优化操作参数,如HRT,影响NO3--N,DO和温度对于高效的SDAD至关重要.
- 硫胺的占主导地位凸显了它在SDAD生物膜过程中去除的重要性.
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