EFFECT OF TYPICAL FLOCCULANTS ON FORMATION AND ADSORPTION CHARACTERISTICS OF SLUDGE-DERIVED HYDROCHAR

WANG Tao; LING Xiaolong; DONG Yuanyuan; BU Jiuhe; HU Xiaohui

doi:10.13205/j.hjgc.202412020

Volume 42 Issue 12

Dec. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(12): 166-173

Wang Qiong, Wang Ping, Fu Hongyuan, He Zhongming. ADSORPTION OF HEXAVALENT CHROMIUM IN WASTEWATER BY MODIFIED FLY ASH DOPING PYRITE CINDERFLY ASH DOPING PYRITE CINDERWASTEWATER/WASTE TREATMENT[J]. ENVIRONMENTAL ENGINEERING , 2015, 33(10): 1-4. doi: 10.13205/j.hjgc.201510001

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WANG Tao, LING Xiaolong, DONG Yuanyuan, BU Jiuhe, HU Xiaohui. EFFECT OF TYPICAL FLOCCULANTS ON FORMATION AND ADSORPTION CHARACTERISTICS OF SLUDGE-DERIVED HYDROCHAR[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 166-173. doi: 10.13205/j.hjgc.202412020

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EFFECT OF TYPICAL FLOCCULANTS ON FORMATION AND ADSORPTION CHARACTERISTICS OF SLUDGE-DERIVED HYDROCHAR

doi: 10.13205/j.hjgc.202412020

1. School of Environmental Engineering, Wuxi University, Wuxi 214105, China;
2. School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China

Received Date: 2023-10-08
Available Online: 2025-01-18

Abstract

Abstract

Hydrothermal carbonization technology is a potential technology for the resource utilization of municipal sludge. As the main product, sludge-derived hydrochar can be used as an adsorbent for wastewater treatment. However, the effects of flocculant addition in sludge dewatering on formation and adsorption characteristics of sludge-derived hydrochar are still unclear. Therefore, in this study, three typical flocculants (polyaluminum chloride, polyferric sulfate, and polyacrylamide) were added to municipal sludge and incubated at 180 ℃ for 4 h to prepare three kinds of sludge-derived hydrochar. After that, methylene blue and tetracycline were used as simulated pollutants to investigate the effects of flocculant addition on the yield and adsorption characteristics of sludge-derived hydrochar. The results showed that different flocculants could affect not only the yield but also the adsorption characteristics of sludge-derived hydrochar. In detail, the yield of hydrochar was up to 70.14% after adding polyaluminum chloride, which was significantly improved compared with 65.35% in the blank group. In terms of adsorption, when the target pollutant was tetracycline, polyferric sulfate had a great influence on the adsorption behavior of sludge-derived hydrochar, and the adsorption capacity was up to 47.89 mg/g. When the target pollutant was methylene blue, polyacrylamide had a great influence on the adsorption behavior of sludge-derived hydrochar, and the adsorption capacity reached 23.39 mg/g. This study can provide theoretical support for effective utilization of sludge-derived hydrochar.
- municipal sludge,
- hydrocar,
- flocculant,
- adsorbent

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References

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