Life cycle and environmental impact assessment of vegetation-activated sludge process (V-ASP) for decentralized wastewater treatment

IF 3.6 Q2 BIOTECHNOLOGY & APPLIED MICROBIOLOGY
Pu Li , Xiaomeng Hu , Jiajia Yuan , Feiyun Sun , Pengfei Li , Wenyi Dong , Erdeng Du , Mingguo Peng
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引用次数: 0

Abstract

The integrated Vegetation-Activated Sludge Process (V-ASP) has emerged as a promising solution for decentralized wastewater treatment, offering a unique combination of landscape vegetation with the traditional Anaerobic-Anoxic-Oxic process (AAO). The experiments displayed that V-ASP consistently demonstrated remarkable treatment performance, maintaining stable removal efficiency exceeding 90 % for COD, NH4+-N, and TP. The vegetation growth is helpful for the removal of pollutants and the microbial community in the allocated vegetation root, while the bulk suspended sludge was changed significantly by using PCR test. To comprehensively evaluate the environmental footprint of V-ASP, a Life Cycle Assessment (LCA) was conducted. The mass balance calculation containing wastewater treatment performance, energy consumption, vegetation growth behavior, greenhouse gas (GHG) emissions, treated water, and sludge discharge was carried out to establish the life cycle inventories (LCI). SimaPro 9.0 software and the ReCiPe (H) midpoint impact assessment method were employed, which revealed that the V-ASP system boasts low GHG emissions and freshwater eutrophication potential compared to the traditional AAO process. In essence, this study provides a comprehensive understanding of the V-ASP system, especially the environmental impacts, guiding its potential for sustainable decentralized sewage treatment applications.

Abstract Image

用于分散式污水处理的植被活性污泥法(V-ASP)的生命周期和环境影响评估
综合植被-活性污泥法(V-ASP)将景观植被与传统的厌氧-缺氧-缺氧工艺(AAO)独特地结合在一起,成为一种前景广阔的分散式污水处理解决方案。实验表明,V-ASP 的处理效果显著,对 COD、NH4+-N 和 TP 的去除率稳定在 90% 以上。植被的生长有助于污染物的去除和分配植被根部的微生物群落,而通过 PCR 测试,大量悬浮污泥发生了显著变化。为全面评估 V-ASP 的环境足迹,进行了生命周期评估(LCA)。质量平衡计算包括废水处理性能、能耗、植被生长行为、温室气体排放、处理水和污泥排放,以建立生命周期清单(LCI)。采用 SimaPro 9.0 软件和 ReCiPe (H) 中点影响评估方法,结果表明与传统 AAO 工艺相比,V-ASP 系统具有较低的温室气体排放和淡水富营养化潜力。从本质上讲,本研究提供了对 V-ASP 系统的全面了解,尤其是对环境影响的了解,并为其在可持续分散式污水处理应用中的潜力提供了指导。
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来源期刊
Current Research in Biotechnology
Current Research in Biotechnology Biochemistry, Genetics and Molecular Biology-Biotechnology
CiteScore
6.70
自引率
3.60%
发文量
50
审稿时长
38 days
期刊介绍: Current Research in Biotechnology (CRBIOT) is a new primary research, gold open access journal from Elsevier. CRBIOT publishes original papers, reviews, and short communications (including viewpoints and perspectives) resulting from research in biotechnology and biotech-associated disciplines. Current Research in Biotechnology is a peer-reviewed gold open access (OA) journal and upon acceptance all articles are permanently and freely available. It is a companion to the highly regarded review journal Current Opinion in Biotechnology (2018 CiteScore 8.450) and is part of the Current Opinion and Research (CO+RE) suite of journals. All CO+RE journals leverage the Current Opinion legacy-of editorial excellence, high-impact, and global reach-to ensure they are a widely read resource that is integral to scientists' workflow.
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