基于微藻的废水处理对鱼循环水产养殖系统的环境可行性的生命周期评估
April J Arbour1, Pankaj Bhatt2, Halis Simsek2
1Department of Food Science, Purdue University, West Lafayette, IN, United States.
Bioresource technology
|March 13, 2024
概括
在养殖场的微藻污水处理是环境可行的,大大减少了淡水和海洋化. 优化电力来源,特别是可再生能源,是最大限度地减少系统的关键.
科学领域:
- 环境科学 环境科学
- 水产养殖工程 水产养殖工程
- 生物技术是生物技术.
背景情况:
- 用于养殖的循环水产养殖系统 (RAS) 面临着环境挑战,包括废水排放.
- 微藻为水产养殖废水处理提供了潜在的生物解决方案.
- 生命周期评估 (LCA) 对于评估集成系统的环境可持续性至关重要.
研究的目的:
- 评估将基于微藻的废水处理整合到使用RAS的养殖场的环境影响.
- 为了比较微藻处理与传统活性污泥处理的性能.
- 确定影响综合系统整体环境足迹的关键因素.
主要方法:
- 进行综合生命周期评估 (LCA) 的养殖场与集成的微藻废水处理.
- 量化环境影响,如淡水优化潜力 (FEP),海洋优化潜力 (MEP) 和全球变暖潜力 (GWP).
- 分析不同的场景,包括藻类生物质 (沼气,料,生物柴油) 的能源和最终用途.
主要成果:
- 微藻处理对该系统的FEP,MEP和GWP贡献不到10%,主要是由电力消耗驱动的.
- 微藻处理显示出与活性污泥相比,FEP的减少程度相当,在海洋环保修复中表现优越.
- 可再生能源大大降低了系统的环境影响 (高达99%);从藻类生物质中生产生物气有利地减少了MEP,而料和生物柴油生产没有优势.
结论:
- 基于微藻的废水处理是RAS的养殖场的环境可行的选择.
- 系统设计和运营选择,特别是电力供应和藻类生物质利用,显著影响环境性能.
- 这项研究为开发更可持续的RAS操作和扩大微藻处理技术提供了宝贵的见解.
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