Resource utilization of waste tailings: Simulated removal of nitrogen from secondary effluent by autotrophic denitrification based on pyrite tailings

Jie Mao; Jie Mao; Jie Mao; Mengqi He; Mengqi He; Ying Qin; You Chen; Xinyu Wang; Haojie Che; Haojie Che; Chun Cheng; Chun Cheng; Tiantian Wang; Wenliang Wang; Bai Sun; Bai Sun; Bai Sun; Shuguang Zhu; Shuguang Zhu; Shuguang Zhu

doi:10.3389/fenvs.2022.949618

Frontiers in Environmental Science (Aug 2022)

Resource utilization of waste tailings: Simulated removal of nitrogen from secondary effluent by autotrophic denitrification based on pyrite tailings

Jie Mao,
Jie Mao,
Jie Mao,
Mengqi He,
Mengqi He,
Ying Qin,
You Chen,
Xinyu Wang,
Haojie Che,
Haojie Che,
Chun Cheng,
Chun Cheng,
Tiantian Wang,
Wenliang Wang,
Bai Sun,
Bai Sun,
Bai Sun,
Shuguang Zhu,
Shuguang Zhu,
Shuguang Zhu

Affiliations

Jie Mao: Engineering Research Center of Ministry of Education, Anhui Jianzhu University, Hefei, China
Jie Mao: Key Laboratory of Water Pollution Control and Wastewater Recycling of Anhui Province, Hefei, China
Jie Mao: School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, China
Mengqi He: Key Laboratory of Water Pollution Control and Wastewater Recycling of Anhui Province, Hefei, China
Mengqi He: School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, China
Ying Qin: School of Mechanical and Electrical Engineering, Anhui Jianzhu University, Hefei, China
You Chen: School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, China
Xinyu Wang: Nanjing University Environmental Planning and Design Research Institute Group Co., Nanjing, China
Haojie Che: Key Laboratory of Water Pollution Control and Wastewater Recycling of Anhui Province, Hefei, China
Haojie Che: School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, China
Chun Cheng: Key Laboratory of Water Pollution Control and Wastewater Recycling of Anhui Province, Hefei, China
Chun Cheng: School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, China
Tiantian Wang: School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, China
Wenliang Wang: Anhui Magang Zhangzhuang Mining Co., Ltd., Luan, China
Bai Sun: Engineering Research Center of Ministry of Education, Anhui Jianzhu University, Hefei, China
Bai Sun: Key Laboratory of Water Pollution Control and Wastewater Recycling of Anhui Province, Hefei, China
Bai Sun: School of Environmental and Energy Engineering, Anhui Jianzhu University, Hefei, China
Shuguang Zhu: Engineering Research Center of Ministry of Education, Anhui Jianzhu University, Hefei, China
Shuguang Zhu: Key Laboratory of Water Pollution Control and Wastewater Recycling of Anhui Province, Hefei, China
Shuguang Zhu: Energy Saving Research Institute, Anhui Jianzhu University, Hefei, China

DOI: https://doi.org/10.3389/fenvs.2022.949618
Journal volume & issue: Vol. 10

Abstract

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In this report, eco-friendly and low-cost pyrite tailings are utilized as denitrification materials, while pyrite and magnetite are used as the control experimental groups to explore the denitrification performance of pyrite tailings. The results show that the removal effect of pyrite tailings on NO3− is slightly lower than that of pyrite. However, the concentration of NH4+ decreased, and the effluent SO42- concentration was lower than that of pyrite. In addition, pyrite with different particle sizes is prepared by the ball milling method, and the effect of particle size on the denitrification performance of pyrite is studied. The results show that with the decrease in particle size, microorganisms are more likely to use S in tailings as electron donors, the denitrification rate is faster, and the denitrification effect was better at the same time.

Published in Frontiers in Environmental Science

ISSN: 2296-665X (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Geography. Anthropology. Recreation: Environmental sciences
Website: https://www.frontiersin.org/journals/environmental-science

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