Recent Progress in Sludge-Derived Biochar and Its Role in Wastewater Purification

Yujun Zhou, Jiamin Gao, Xuran Yang, Hao Ni, Junwen Qi, Zhigao Zhu, Yue Yang, Di Fang, Lixiang Zhou and Jiansheng Li ()
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Yujun Zhou: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Jiamin Gao: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Xuran Yang: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Hao Ni: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Junwen Qi: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Zhigao Zhu: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Yue Yang: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
Lixiang Zhou: Department of Environmental Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Jiansheng Li: School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China

Sustainability, 2024, vol. 16, issue 12, 1-16

Abstract: As the by-product of wastewater treatment, a large amount of sludge is generated annually. Turning this waste into a resource is a feasible and sustainable strategy to reduce potential environmental risks and recover energy. As a way to realize the international goal of carbon dioxide emission peak and carbon neutrality, producing biochar from sludge has gained worldwide attention. This review evaluates recent progress in synthesis techniques for biochar of sludge origin. Different preparation techniques and their key affecting factors are compared and described. The obtained sludge-derived biochar could be employed for eliminating aqueous pollution or purifying wastewater, mainly through adsorption and catalytic reactions. The removal of various pollutants by sludge-derived biochar and its related mechanisms are discussed and summarized in detail. This review will be conducive for a comprehensive understanding of recent progress in sludge-derived biochar study and for guiding the purposeful production of biochar, as well as for developing wastewater purification technology based on sludge-derived biochar.

Keywords: sludge; biochar; pyrolysis; wastewater; adsorption; advanced oxidation process (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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