Sustainable electroless nutrient recovery from natural agro-industrial and livestock farm wastewater effluents with a flow cell reactor

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2024-10-16 DOI:10.1016/j.resconrec.2024.107972

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引用次数: 0

Abstract

Nutrient removal using renewable/green energy sources and their impact on the surrounding environment is still limited. To fill this knowledge gap, we studied the simultaneous production of struvite, hydrogen, and electricity with no applied voltage/current or chemical adjustment using a flow-cell reactor in farm wastewater compositions, and their impact on the surrounding environment by using life cycle assessment (LCA). In a 3 h experiment, the flow cell reactor removed up to 87 % of phosphate and 77 % of ammonia thus improving water quality. The produced electricity decreased over time due to the formation of a passivating film and hydrogen bubbles on the magnesium anode. Surface characterization techniques (FT-IR, XRD, SEM) indicated that the obtained struvite was of good quality, while chemical analysis showed < 2.6 % of Ca²⁺as co-precipitate. The LCA showed that generation of struvite, hydrogen, and electricity provided major environmental credits, but the manufacturing of magnesium anode had environmental burdens.

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利用流动池反应器从天然农用工业废水和畜牧场废水中进行可持续的无电解营养回收

利用可再生/绿色能源去除养分及其对周围环境的影响仍然有限。为了填补这一知识空白，我们研究了在农场废水成分中使用流动电池反应器，在不施加电压/电流或化学调整的情况下同时生产硬质合金、氢气和电能的情况，并通过生命周期评估（LCA）研究了它们对周围环境的影响。在 3 小时的实验中，流动池反应器去除了高达 87% 的磷酸盐和 77% 的氨氮，从而改善了水质。由于在镁阳极上形成了钝化膜和氢气泡，产生的电量随着时间的推移而减少。表面表征技术（傅立叶变换红外光谱、X 射线衍射、扫描电子显微镜）表明，所获得的硬石膏质量良好，而化学分析则显示有 < 2.6 % 的 Ca2+ 作为共沉淀。生命周期分析表明，产生的硬石膏、氢气和电力提供了主要的环境效益，但镁阳极的制造却带来了环境负担。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.