对高度有机废水处理的传统和新兴方法进行生命周期比较评估
Yilin Yuan1, Fengming Zhang2, Yuxin Qiu3
1Guangzhou Institute of Advanced Technology, Guangzhou 511458, China; China University of Geosciences, Wuhan 430074, China.
The Science of the total environment
|December 8, 2024
概括
焚烧和超临界氧化水 (SCWO) 显示,随着化学氧气需求 (COD) 的增加,高度有机废水对环境的影响较低. 传统的测序批量反应堆激活污泥工艺 (SBR) 的影响最大.
科学领域:
- 环境科学 环境科学
- 化学工程是化学工程的重要组成部分.
- 废水处理技术 废水处理技术
背景情况:
- 电子制造等行业的高度有机废水带来了重大的环境挑战.
- 传统方法 (焚烧,SBR) 和新兴技术 (SCWO,CWO-SBR) 被评估他们的环境足迹.
- 印刷油墨废水被用作具有代表性的高COD废水,用于比较分析.
研究的目的:
- 为了比较焚烧对环境的影响,SBR,SCWO和CWO-SBR用于处理高度有机废水.
- 分析不同化学氧需求 (COD) 度对每个工艺的环境性能的影响.
- 量化评估整体环境影响和处理方法的全面竞争力.
主要方法:
- 使用Simapro 9.3软件与Traci影响评估方法和Ecoinvent 3.8数据库进行生命周期评估 (LCA).
- 评估了四种废水处理工艺:焚烧,序列批量反应堆激活污泥工艺 (SBR),超临界水氧化 (SCWO) 和与SBR结合的催化湿氧化 (CWO-SBR).
- 通过将印刷油墨废水稀释到各种COD度进行了灵敏度分析.
主要成果:
- 焚烧和SCWO显示,由于燃料和能源需求减少,COD度增加,环境影响减少.
- CWO-SBR和SBR表现出相反的趋势,在COD度增加时,环境影响更大.
- 在基准案例COD为234,000 mg/L时,焚烧对环境总影响最低 (0.030),而SBR对环境总影响最高 (1.117). 斯科沃表现出最高的综合指数 (0.956).
结论:
- 像SCWO这样的新兴技术为高度有机废水处理提供了具有竞争力的环境性能.
- 处理过程对环境的影响受到初始废水COD度的重大影响.
- 与SBR和CWO-SBR相比,焚烧和SCWO在经过测试的高COD条件下呈现出更有利的环境状况.
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