Non-dispersive infrared (NDIR) sensor for real-time nitrate monitoring in wastewater treatment

Non-dispersive infrared (NDIR) sensor for real-time nitrate monitoring in wastewater treatment
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用于废水处理中实时硝酸盐监测的非色散红外 (NDIR) 传感器

DOI:
10.1117/12.2506550
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发表时间:
2019
期刊:
SPIE Photonics West
影响因子:
--
通讯作者:
Robbins, Dennis
Robbins, Dennis
中科院分区:
--
文献类型:
--
作者:
Roodenko, Katy;Hinojos, David;Hodges, Kimari L.;Veyan, J.-F.;Chabal, Yves J.;Clark, Kevin;Katzir, Abraham;Robbins, Dennis

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硝酸盐是一种常见的水污染物,它是由人类活动引起的,如过量施用化肥和农业径流以及人类和动物废物的不当处理。流域中硝酸盐含量过高会引发有害藻华和生物多样性丧失,其后果影响经济并对人类健康构成威胁。因此,城市饮用水和废水处理厂必须控制氮含量,以确保饮用水的安全和污水的适当排放。硝酸盐在红外光谱范围内具有明显的吸收带。虽然红外辐射在水中会强烈衰减,但光纤倏逝波光谱(FEWS)的实现能够以高灵敏度实时监测水污染物。这项工作概述了非色散红外(NNDT)检测器的开发,用于实时监测硝酸盐,亚硝酸盐和氨浓度,目标是在城市污水处理厂(WWTPs)和现场污水处理系统(OWTS)实施。
Nitrate is a frequent water pollutant that results from human activities such as fertilizer over-application and agricultural runoff and improper disposal of human and animals waste. Excess levels of nitrate in watersheds can trigger harmful algal blooms (HABs) and biodiversity loss with consequences that affect the economy and pose a threat to human health. Municipal drinking water and wastewater treatment plants are therefore required to control nitrogen levels to ensure the safety of drinking water and the proper discharge of effluent. Nitrate exhibits distinct absorption bands in the infrared spectral range. While infrared radiation is strongly attenuated in water, implementation of fiber optic evanescent wave spectroscopy (FEWS) enables monitoring of water contaminants in real-time with high sensitivity. This work outlines the development of a non-dispersive infrared (NDIR) detector for the real-time monitoring of nitrate, nitrite and ammonia concentrations targeting implementation at municipal wastewater treatment plants (WWTPs) and onsite wastewater treatment systems (OWTS).
用于传感应用的红外光纤倏逝波光谱 (FEWS)(会议演示)
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