A novel sulfur-based fiber carrier fixed-bed reactor for nitrate-contaminated wastewater treatment: Performance, operational characteristics and cold-tolerant mechanism

IF 7.4 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of Environmental Chemical Engineering Pub Date : 2024-09-20 DOI:10.1016/j.jece.2024.114203

Mingdong Chang , Xiubo Chen , Jian Shen , Tong Zhu , Tangfu Xiao , Jianqiao Wang , Chao Wang , Youzhao Wang

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引用次数: 0

Abstract

In the view of the serious prejudice of nitrates, sulfur-based autotrophic denitrification filter (SADF) has been widely used for deep nitrate removal from electron-donor-deficient water. However, it faces many challenges like slow start-up, reliance on backwashing, and poor low-temperature tolerance. For these challenges, a novel sulfur-based fiber carrier fixed bed reactor (SFFR) was developed in this study. It was found that SFFR had great film-forming ability and flow field characteristics, which promoted it to obtain superior denitrification performance, and the maximum nitrogen removal rate of 0.53 kg-N/m³/d. Meanwhile, SFFR shows significant cold tolerance, and alleviating the acidification problem of effluent to a certain extent. To sum up, the SFFR possesses the potential to be widely used in real-world wastewater treatment applications, especially as a promising solution for nitrate removal in cold regions. This study can provide an important reference for the improvement of the elemental sulfur autotrophic denitrification process.

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用于硝酸盐污染废水处理的新型硫基纤维载体固定床反应器：性能、运行特点和耐寒机制

鉴于硝酸盐的严重危害，硫基自养反硝化过滤器（SADF）已被广泛用于深度去除缺电子供体水体中的硝酸盐。然而，它面临着启动慢、依赖反冲洗、耐低温性差等诸多挑战。针对这些挑战，本研究开发了一种新型硫基纤维载体固定床反应器（SFFR）。研究发现，硫基纤维载体固定床反应器具有良好的成膜能力和流场特性，使其获得了优异的脱氮性能，最大脱氮率达到 0.53 kg-N/m3/d。同时，SFFR 具有明显的耐寒性，在一定程度上缓解了污水酸化问题。总之，SFFR 具有在实际污水处理中广泛应用的潜力，尤其是作为寒冷地区去除硝酸盐的一种有前途的解决方案。本研究可为元素硫自养反硝化工艺的改进提供重要参考。

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来源期刊

Journal of Environmental Chemical Engineering Environmental Science-Pollution

CiteScore

11.40

自引率

6.50%

发文量

2017

审稿时长

27 days

期刊介绍： The Journal of Environmental Chemical Engineering (JECE) serves as a platform for the dissemination of original and innovative research focusing on the advancement of environmentally-friendly, sustainable technologies. JECE emphasizes the transition towards a carbon-neutral circular economy and a self-sufficient bio-based economy. Topics covered include soil, water, wastewater, and air decontamination; pollution monitoring, prevention, and control; advanced analytics, sensors, impact and risk assessment methodologies in environmental chemical engineering; resource recovery (water, nutrients, materials, energy); industrial ecology; valorization of waste streams; waste management (including e-waste); climate-water-energy-food nexus; novel materials for environmental, chemical, and energy applications; sustainability and environmental safety; water digitalization, water data science, and machine learning; process integration and intensification; recent developments in green chemistry for synthesis, catalysis, and energy; and original research on contaminants of emerging concern, persistent chemicals, and priority substances, including microplastics, nanoplastics, nanomaterials, micropollutants, antimicrobial resistance genes, and emerging pathogens (viruses, bacteria, parasites) of environmental significance.