管理微生物硫不成比例,以在试点规模的元素硫包装床生物反应器中实现最佳的硫自化脱
Yi-Lu Sun1, Si-Yuan Zhai1, Zhi-Min Qian2
1Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China.
Water research
|July 29, 2023
概括
在元素硫包装床 (S0PB) 生物反应器中的微生物硫不成比例 (MS0D) 可以阻碍深度脱. 这项研究确定了低硫异质电子受体是诱导MS0D的关键,提供了控制硫化物生产的策略.
科学领域:
- 环境微生物学环境微生物学
- 废水处理技术 废水处理技术
- 生物地质化学硫循环循环.
背景情况:
- 基本硫包装床 (S0PB) 生物反应器由于成本效益和低排放,对自性脱有希望.
- 微生物硫不成比例 (MS0D),其中细菌使用硫作为电子捐赠者和接受者,是S0PB系统中鲜为人知的过程.
- 在S0PB反应堆内的深度脱过程中,MS0D可能会导致重大缺陷.
研究的目的:
- 在试点规模的S0PB生物反应器中调查MS0D的诱导.
- 为了确定影响MS0D在深度自营性脱过程中发展的因素.
- 探索用于减轻不必要的硫化物生产的操作策略.
主要方法:
- 经营了一个试点规模的S0PB生物反应器,用于酸盐去除.
- 通过减少影响酸盐和保持低水平的其他硫异质电子受体 (SHEAs) 来诱导MS0D.
- 分析了微生物群落的转移,并将SHEA度与硫化物生产相关联.
主要成果:
- 在使用枯竭的SHEAs (化,DO) 的条件下成功诱导MS0D,导致高硫酸盐和硫化物产生.
- 微生物群落发生了明显的转变,硫不成比例的细菌 (SDB) 丰富,硫氧化细菌 (SOB) 减少.
- 缩短空床接触时间 (EBCT) 和增加反流比率有效地将硫化物产量从43.9 mg/L降至25.5 mg/L以下.
结论:
- 缺少SHEAs是S0PB生物反应器中诱导MS0D的主要因素.
- 了解和管理MS0D对于优化S0PB系统以实现可持续的自营性脱至关重要.
- 像EBCT和反流率这样的操作调整可以控制硫化物副产品的形成.
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