典型絮凝剂对污泥基水热炭生成及吸附特性影响

王涛; 凌肖龙; 董媛媛; 卜久贺; 胡晓会

doi:10.13205/j.hjgc.202412020

典型絮凝剂对污泥基水热炭生成及吸附特性影响

doi: 10.13205/j.hjgc.202412020

1. 无锡学院环境工程学院, 江苏无锡 214105;
2. 南京信息工程大学环境科学与工程学院, 南京 210044

基金项目:

江苏省自然科学基金面上项目(BK20211035)

详细信息

作者简介:
王涛(1984-),男,讲师,主要研究方向为有机固废处理与资源化。wangtao0532@cwxu.edu.cn

通讯作者:
胡晓会(1990-),女,讲师,主要研究方向为有机固废资源化处理。huxiaohui@cwxu.edu.cn

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出版历程
- 收稿日期: 2023-10-08
- 网络出版日期: 2025-01-18

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

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

摘要

摘要: 水热碳化技术(hydrothermal carbonization, HTC)是市政污泥资源化利用的潜力技术,主要产品水热炭可作为水处理吸附剂进行使用,但污泥脱水中添加的絮凝剂对后续水热炭生成及吸附特性的影响尚不清楚。实验以市政污泥为原料,分别添加了3种典型絮凝剂[聚合氯化铝(PAC)、聚合硫酸铁(PFS)及聚丙烯酰胺(PAM)],在180 ℃、4 h条件下制备获得污泥基水热炭。随后以亚甲基蓝(methylene blue, MB)、四环素(tetracycline, TC)作为模拟污染物,分析了絮凝剂加入对污泥水热炭产率及吸附特性的影响。结果表明:絮凝剂的加入不仅影响了污泥水热炭的产率和吸附特性,且不同絮凝剂造成的影响并不相同。其中聚合氯化铝加入后,水热炭的产率最高可达70.14%,相比未添加絮凝剂的空白组产率(65.35%)得到了明显提升。在吸附方面,目标污染物为TC时,PFS对污泥基水热炭的吸附行为影响较大,吸附量最高达到47.89 mg/g。目标污染物为MB时,DAM对污泥基水热炭的吸附行为影响较大,吸附量最高达到23.39 mg/g。该研究成果可为污泥水热炭的后续利用提供相应支撑。
- 市政污泥 /
- 水热炭 /
- 絮凝剂 /
- 吸附剂
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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参考文献(20)

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